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Diffstat (limited to 'src/designer/src/lib/shared/qlayout_widget.cpp')
| -rw-r--r-- | src/designer/src/lib/shared/qlayout_widget.cpp | 2107 |
1 files changed, 2107 insertions, 0 deletions
diff --git a/src/designer/src/lib/shared/qlayout_widget.cpp b/src/designer/src/lib/shared/qlayout_widget.cpp new file mode 100644 index 000000000..66e7a795b --- /dev/null +++ b/src/designer/src/lib/shared/qlayout_widget.cpp @@ -0,0 +1,2107 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the Qt Designer of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qlayout_widget_p.h" +#include "qdesigner_utils_p.h" +#include "layout_p.h" +#include "layoutinfo_p.h" +#include "invisible_widget_p.h" +#include "qdesigner_widgetitem_p.h" + +#include <QtDesigner/QDesignerFormWindowInterface> +#include <QtDesigner/QExtensionManager> +#include <QtDesigner/QDesignerFormEditorInterface> +#include <QtDesigner/QDesignerPropertySheetExtension> +#include <QtDesigner/QDesignerWidgetFactoryInterface> + +#include <QtGui/QPainter> +#include <QtGui/QHBoxLayout> +#include <QtGui/QVBoxLayout> +#include <QtGui/QGridLayout> +#include <QtGui/QFormLayout> +#include <QtGui/qevent.h> + +#include <QtCore/qdebug.h> +#include <QtCore/QtAlgorithms> +#include <QtCore/QMap> +#include <QtCore/QStack> +#include <QtCore/QPair> +#include <QtCore/QSet> + +enum { ShiftValue = 1 }; +enum { debugLayout = 0 }; +enum { FormLayoutColumns = 2 }; +enum { indicatorSize = 2 }; +// Grid/form Helpers: get info (overloads to make templates work) + +namespace { // Do not use static, will break HP-UX due to templates + +QT_USE_NAMESPACE + +// overloads to make templates over QGridLayout/QFormLayout work +inline int gridRowCount(const QGridLayout *gridLayout) +{ + return gridLayout->rowCount(); +} + +inline int gridColumnCount(const QGridLayout *gridLayout) +{ + return gridLayout->columnCount(); +} + +// QGridLayout/QFormLayout Helpers: get item position (overloads to make templates work) +inline void getGridItemPosition(QGridLayout *gridLayout, int index, + int *row, int *column, int *rowspan, int *colspan) +{ + gridLayout->getItemPosition(index, row, column, rowspan, colspan); +} + +QRect gridItemInfo(QGridLayout *grid, int index) +{ + int row, column, rowSpan, columnSpan; + // getItemPosition is not const, grmbl.. + grid->getItemPosition(index, &row, &column, &rowSpan, &columnSpan); + return QRect(column, row, columnSpan, rowSpan); +} + +inline int gridRowCount(const QFormLayout *formLayout) { return formLayout->rowCount(); } +inline int gridColumnCount(const QFormLayout *) { return FormLayoutColumns; } + +inline void getGridItemPosition(QFormLayout *formLayout, int index, int *row, int *column, int *rowspan, int *colspan) +{ + qdesigner_internal::getFormLayoutItemPosition(formLayout, index, row, column, rowspan, colspan); +} + +QRect gridItemInfo(const QFormLayout *form, int index) +{ + int row; + int column; + int colspan; + qdesigner_internal::getFormLayoutItemPosition(form, index, &row, &column, 0, &colspan); + return QRect(column, row, colspan, 1); +} +} // namespace anonymous + +QT_BEGIN_NAMESPACE + +static const char *objectNameC = "objectName"; +static const char *sizeConstraintC = "sizeConstraint"; + +/* A padding spacer element that is used to represent an empty form layout cell. It should grow with its cell. + * Should not be used on a grid as it causes resizing inconsistencies */ +namespace qdesigner_internal { + class PaddingSpacerItem : public QSpacerItem { + public: + PaddingSpacerItem() : QSpacerItem(0, 0, QSizePolicy::MinimumExpanding, QSizePolicy::MinimumExpanding) {} + virtual Qt::Orientations expandingDirections () const { return Qt::Vertical | Qt::Horizontal; } + }; +} + +static inline QSpacerItem *createGridSpacer() +{ + return new QSpacerItem(0, 0); +} + +static inline QSpacerItem *createFormSpacer() +{ + return new qdesigner_internal::PaddingSpacerItem; +} + +// QGridLayout/QFormLayout Helpers: Debug items of GridLikeLayout +template <class GridLikeLayout> +static QDebug debugGridLikeLayout(QDebug str, const GridLikeLayout &gl) +{ + const int count = gl.count(); + str << "Grid: " << gl.objectName() << gridRowCount(&gl) << " rows x " << gridColumnCount(&gl) + << " cols " << count << " items\n"; + for (int i = 0; i < count; i++) { + QLayoutItem *item = gl.itemAt(i); + str << "Item " << i << item << item->widget() << gridItemInfo(const_cast<GridLikeLayout *>(&gl), i) << " empty=" << qdesigner_internal::LayoutInfo::isEmptyItem(item) << "\n"; + } + return str; +} + +static inline QDebug operator<<(QDebug str, const QGridLayout &gl) { return debugGridLikeLayout(str, gl); } +static inline QDebug operator<<(QDebug str, const QFormLayout &fl) { return debugGridLikeLayout(str, fl); } + +static inline bool isEmptyFormLayoutRow(const QFormLayout *fl, int row) +{ + // Spanning can never be empty + if (fl->itemAt(row, QFormLayout::SpanningRole)) + return false; + return qdesigner_internal::LayoutInfo::isEmptyItem(fl->itemAt(row, QFormLayout::LabelRole)) && qdesigner_internal::LayoutInfo::isEmptyItem(fl->itemAt(row, QFormLayout::FieldRole)); +} + +static inline bool canSimplifyFormLayout(const QFormLayout *formLayout, const QRect &restrictionArea) +{ + if (restrictionArea.x() >= FormLayoutColumns) + return false; + // Try to find empty rows + const int bottomCheckRow = qMin(formLayout->rowCount(), restrictionArea.top() + restrictionArea.height()); + for (int r = restrictionArea.y(); r < bottomCheckRow; r++) + if (isEmptyFormLayoutRow(formLayout, r)) + return true; + return false; +} + +// recreate a managed layout (which does not automagically remove +// empty rows/columns like grid or form layout) in case it needs to shrink + +static QLayout *recreateManagedLayout(const QDesignerFormEditorInterface *core, QWidget *w, QLayout *lt) +{ + const qdesigner_internal::LayoutInfo::Type t = qdesigner_internal::LayoutInfo::layoutType(core, lt); + qdesigner_internal::LayoutProperties properties; + const int mask = properties.fromPropertySheet(core, lt, qdesigner_internal::LayoutProperties::AllProperties); + qdesigner_internal::LayoutInfo::deleteLayout(core, w); + QLayout *rc = core->widgetFactory()->createLayout(w, 0, t); + properties.toPropertySheet(core, rc, mask, true); + return rc; +} + +// QGridLayout/QFormLayout Helpers: find an item on a form/grid. Return index +template <class GridLikeLayout> +int findGridItemAt(GridLikeLayout *gridLayout, int at_row, int at_column) +{ + Q_ASSERT(gridLayout); + const int count = gridLayout->count(); + for (int index = 0; index < count; index++) { + int row, column, rowspan, colspan; + getGridItemPosition(gridLayout, index, &row, &column, &rowspan, &colspan); + if (at_row >= row && at_row < (row + rowspan) + && at_column >= column && at_column < (column + colspan)) { + return index; + } + } + return -1; +} +// QGridLayout/QFormLayout Helpers: remove dummy spacers on form/grid +template <class GridLikeLayout> +static bool removeEmptyCellsOnGrid(GridLikeLayout *grid, const QRect &area) +{ + // check if there are any items in the way. Should be only spacers + // Unique out items that span rows/columns. + QVector<int> indexesToBeRemoved; + indexesToBeRemoved.reserve(grid->count()); + const int rightColumn = area.x() + area.width(); + const int bottomRow = area.y() + area.height(); + for (int c = area.x(); c < rightColumn; c++) + for (int r = area.y(); r < bottomRow; r++) { + const int index = findGridItemAt(grid, r ,c); + if (index != -1) + if (QLayoutItem *item = grid->itemAt(index)) { + if (qdesigner_internal::LayoutInfo::isEmptyItem(item)) { + if (indexesToBeRemoved.indexOf(index) == -1) + indexesToBeRemoved.push_back(index); + } else { + return false; + } + } + } + // remove, starting from last + if (!indexesToBeRemoved.empty()) { + qStableSort(indexesToBeRemoved.begin(), indexesToBeRemoved.end()); + for (int i = indexesToBeRemoved.size() - 1; i >= 0; i--) + delete grid->takeAt(indexesToBeRemoved[i]); + } + return true; +} + +namespace qdesigner_internal { +// --------- LayoutProperties + +LayoutProperties::LayoutProperties() +{ + clear(); +} + +void LayoutProperties::clear() +{ + qFill(m_margins, m_margins + MarginCount, 0); + qFill(m_marginsChanged, m_marginsChanged + MarginCount, false); + qFill(m_spacings, m_spacings + SpacingsCount, 0); + qFill(m_spacingsChanged, m_spacingsChanged + SpacingsCount, false); + + m_objectName = QVariant(); + m_objectNameChanged = false; + m_sizeConstraint = QVariant(QLayout::SetDefaultConstraint); + m_sizeConstraintChanged = false; + + m_fieldGrowthPolicyChanged = m_rowWrapPolicyChanged = m_labelAlignmentChanged = m_formAlignmentChanged = false; + m_fieldGrowthPolicy = m_rowWrapPolicy = m_formAlignment = QVariant(); + + m_boxStretchChanged = m_gridRowStretchChanged = m_gridColumnStretchChanged = m_gridRowMinimumHeightChanged = false; + m_boxStretch = m_gridRowStretch = m_gridColumnStretch = m_gridRowMinimumHeight = QVariant(); +} + +int LayoutProperties::visibleProperties(const QLayout *layout) +{ + // Grid like layout have 2 spacings. + const bool isFormLayout = qobject_cast<const QFormLayout*>(layout); + const bool isGridLike = qobject_cast<const QGridLayout*>(layout) || isFormLayout; + int rc = ObjectNameProperty|LeftMarginProperty|TopMarginProperty|RightMarginProperty|BottomMarginProperty| + SizeConstraintProperty; + + rc |= isGridLike ? (HorizSpacingProperty|VertSpacingProperty) : SpacingProperty; + if (isFormLayout) { + rc |= FieldGrowthPolicyProperty|RowWrapPolicyProperty|LabelAlignmentProperty|FormAlignmentProperty; + } else { + if (isGridLike) { + rc |= GridRowStretchProperty|GridColumnStretchProperty|GridRowMinimumHeightProperty|GridColumnMinimumWidthProperty; + } else { + rc |= BoxStretchProperty; + } + } + return rc; +} + +static const char *marginPropertyNamesC[] = {"leftMargin", "topMargin", "rightMargin", "bottomMargin"}; +static const char *spacingPropertyNamesC[] = {"spacing", "horizontalSpacing", "verticalSpacing" }; +static const char *fieldGrowthPolicyPropertyC = "fieldGrowthPolicy"; +static const char *rowWrapPolicyPropertyC = "rowWrapPolicy"; +static const char *labelAlignmentPropertyC = "labelAlignment"; +static const char *formAlignmentPropertyC = "formAlignment"; +static const char *boxStretchPropertyC = "stretch"; +static const char *gridRowStretchPropertyC = "rowStretch"; +static const char *gridColumnStretchPropertyC = "columnStretch"; +static const char *gridRowMinimumHeightPropertyC = "rowMinimumHeight"; +static const char *gridColumnMinimumWidthPropertyC = "columnMinimumWidth"; + +static bool intValueFromSheet(const QDesignerPropertySheetExtension *sheet, const QString &name, int *value, bool *changed) +{ + const int sheetIndex = sheet->indexOf(name); + if (sheetIndex == -1) + return false; + *value = sheet->property(sheetIndex).toInt(); + *changed = sheet->isChanged(sheetIndex); + return true; +} + +static void variantPropertyFromSheet(int mask, int flag, const QDesignerPropertySheetExtension *sheet, const QString &name, + QVariant *value, bool *changed, int *returnMask) +{ + if (mask & flag) { + const int sIndex = sheet->indexOf(name); + if (sIndex != -1) { + *value = sheet->property(sIndex); + *changed = sheet->isChanged(sIndex); + *returnMask |= flag; + } + } +} + +int LayoutProperties::fromPropertySheet(const QDesignerFormEditorInterface *core, QLayout *l, int mask) +{ + int rc = 0; + const QDesignerPropertySheetExtension *sheet = qt_extension<QDesignerPropertySheetExtension*>(core->extensionManager(), l); + Q_ASSERT(sheet); + // name + if (mask & ObjectNameProperty) { + const int nameIndex = sheet->indexOf(QLatin1String(objectNameC)); + Q_ASSERT(nameIndex != -1); + m_objectName = sheet->property(nameIndex); + m_objectNameChanged = sheet->isChanged(nameIndex); + rc |= ObjectNameProperty; + } + // -- Margins + const int marginFlags[MarginCount] = { LeftMarginProperty, TopMarginProperty, RightMarginProperty, BottomMarginProperty}; + for (int i = 0; i < MarginCount; i++) + if (mask & marginFlags[i]) + if (intValueFromSheet(sheet, QLatin1String(marginPropertyNamesC[i]), m_margins + i, m_marginsChanged + i)) + rc |= marginFlags[i]; + + const int spacingFlags[] = { SpacingProperty, HorizSpacingProperty, VertSpacingProperty}; + for (int i = 0; i < SpacingsCount; i++) + if (mask & spacingFlags[i]) + if (intValueFromSheet(sheet, QLatin1String(spacingPropertyNamesC[i]), m_spacings + i, m_spacingsChanged + i)) + rc |= spacingFlags[i]; + // sizeConstraint, flags + variantPropertyFromSheet(mask, SizeConstraintProperty, sheet, QLatin1String(sizeConstraintC), &m_sizeConstraint, &m_sizeConstraintChanged, &rc); + variantPropertyFromSheet(mask, FieldGrowthPolicyProperty, sheet, QLatin1String(fieldGrowthPolicyPropertyC), &m_fieldGrowthPolicy, &m_fieldGrowthPolicyChanged, &rc); + variantPropertyFromSheet(mask, RowWrapPolicyProperty, sheet, QLatin1String(rowWrapPolicyPropertyC), &m_rowWrapPolicy, &m_rowWrapPolicyChanged, &rc); + variantPropertyFromSheet(mask, LabelAlignmentProperty, sheet, QLatin1String(labelAlignmentPropertyC), &m_labelAlignment, &m_labelAlignmentChanged, &rc); + variantPropertyFromSheet(mask, FormAlignmentProperty, sheet, QLatin1String(formAlignmentPropertyC), &m_formAlignment, &m_formAlignmentChanged, &rc); + variantPropertyFromSheet(mask, BoxStretchProperty, sheet, QLatin1String(boxStretchPropertyC), &m_boxStretch, & m_boxStretchChanged, &rc); + variantPropertyFromSheet(mask, GridRowStretchProperty, sheet, QLatin1String(gridRowStretchPropertyC), &m_gridRowStretch, &m_gridRowStretchChanged, &rc); + variantPropertyFromSheet(mask, GridColumnStretchProperty, sheet, QLatin1String(gridColumnStretchPropertyC), &m_gridColumnStretch, &m_gridColumnStretchChanged, &rc); + variantPropertyFromSheet(mask, GridRowMinimumHeightProperty, sheet, QLatin1String(gridRowMinimumHeightPropertyC), &m_gridRowMinimumHeight, &m_gridRowMinimumHeightChanged, &rc); + variantPropertyFromSheet(mask, GridColumnMinimumWidthProperty, sheet, QLatin1String(gridColumnMinimumWidthPropertyC), &m_gridColumnMinimumWidth, &m_gridColumnMinimumWidthChanged, &rc); + return rc; +} + +static bool intValueToSheet(QDesignerPropertySheetExtension *sheet, const QString &name, int value, bool changed, bool applyChanged) + +{ + + const int sheetIndex = sheet->indexOf(name); + if (sheetIndex == -1) { + qWarning() << " LayoutProperties: Attempt to set property " << name << " that does not exist for the layout."; + return false; + } + sheet->setProperty(sheetIndex, QVariant(value)); + if (applyChanged) + sheet->setChanged(sheetIndex, changed); + return true; +} + +static void variantPropertyToSheet(int mask, int flag, bool applyChanged, QDesignerPropertySheetExtension *sheet, const QString &name, + const QVariant &value, bool changed, int *returnMask) +{ + if (mask & flag) { + const int sIndex = sheet->indexOf(name); + if (sIndex != -1) { + sheet->setProperty(sIndex, value); + if (applyChanged) + sheet->setChanged(sIndex, changed); + *returnMask |= flag; + } + } +} + +int LayoutProperties::toPropertySheet(const QDesignerFormEditorInterface *core, QLayout *l, int mask, bool applyChanged) const +{ + int rc = 0; + QDesignerPropertySheetExtension *sheet = qt_extension<QDesignerPropertySheetExtension*>(core->extensionManager(), l); + Q_ASSERT(sheet); + // name + if (mask & ObjectNameProperty) { + const int nameIndex = sheet->indexOf(QLatin1String(objectNameC)); + Q_ASSERT(nameIndex != -1); + sheet->setProperty(nameIndex, m_objectName); + if (applyChanged) + sheet->setChanged(nameIndex, m_objectNameChanged); + rc |= ObjectNameProperty; + } + // margins + const int marginFlags[MarginCount] = { LeftMarginProperty, TopMarginProperty, RightMarginProperty, BottomMarginProperty}; + for (int i = 0; i < MarginCount; i++) + if (mask & marginFlags[i]) + if (intValueToSheet(sheet, QLatin1String(marginPropertyNamesC[i]), m_margins[i], m_marginsChanged[i], applyChanged)) + rc |= marginFlags[i]; + + const int spacingFlags[] = { SpacingProperty, HorizSpacingProperty, VertSpacingProperty}; + for (int i = 0; i < SpacingsCount; i++) + if (mask & spacingFlags[i]) + if (intValueToSheet(sheet, QLatin1String(spacingPropertyNamesC[i]), m_spacings[i], m_spacingsChanged[i], applyChanged)) + rc |= spacingFlags[i]; + // sizeConstraint + variantPropertyToSheet(mask, SizeConstraintProperty, applyChanged, sheet, QLatin1String(sizeConstraintC), m_sizeConstraint, m_sizeConstraintChanged, &rc); + variantPropertyToSheet(mask, FieldGrowthPolicyProperty, applyChanged, sheet, QLatin1String(fieldGrowthPolicyPropertyC), m_fieldGrowthPolicy, &m_fieldGrowthPolicyChanged, &rc); + variantPropertyToSheet(mask, RowWrapPolicyProperty, applyChanged, sheet, QLatin1String(rowWrapPolicyPropertyC), m_rowWrapPolicy, m_rowWrapPolicyChanged, &rc); + variantPropertyToSheet(mask, LabelAlignmentProperty, applyChanged, sheet, QLatin1String(labelAlignmentPropertyC), m_labelAlignment, m_labelAlignmentChanged, &rc); + variantPropertyToSheet(mask, FormAlignmentProperty, applyChanged, sheet, QLatin1String(formAlignmentPropertyC), m_formAlignment, m_formAlignmentChanged, &rc); + variantPropertyToSheet(mask, BoxStretchProperty, applyChanged, sheet, QLatin1String(boxStretchPropertyC), m_boxStretch, m_boxStretchChanged, &rc); + variantPropertyToSheet(mask, GridRowStretchProperty, applyChanged, sheet, QLatin1String(gridRowStretchPropertyC), m_gridRowStretch, m_gridRowStretchChanged, &rc); + variantPropertyToSheet(mask, GridColumnStretchProperty, applyChanged, sheet, QLatin1String(gridColumnStretchPropertyC), m_gridColumnStretch, m_gridColumnStretchChanged, &rc); + variantPropertyToSheet(mask, GridRowMinimumHeightProperty, applyChanged, sheet, QLatin1String(gridRowMinimumHeightPropertyC), m_gridRowMinimumHeight, m_gridRowMinimumHeightChanged, &rc); + variantPropertyToSheet(mask, GridColumnMinimumWidthProperty, applyChanged, sheet, QLatin1String(gridColumnMinimumWidthPropertyC), m_gridColumnMinimumWidth, m_gridColumnMinimumWidthChanged, &rc); + return rc; +} + +// ---------------- LayoutHelper +LayoutHelper::LayoutHelper() +{ +} + +LayoutHelper::~LayoutHelper() +{ +} + +int LayoutHelper::indexOf(const QLayout *lt, const QWidget *widget) +{ + if (!lt) + return -1; + + const int itemCount = lt->count(); + for (int i = 0; i < itemCount; i++) + if (lt->itemAt(i)->widget() == widget) + return i; + return -1; +} + +QRect LayoutHelper::itemInfo(QLayout *lt, const QWidget *widget) const +{ + const int index = indexOf(lt, widget); + if (index == -1) { + qWarning() << "LayoutHelper::itemInfo: " << widget << " not in layout " << lt; + return QRect(0, 0, 1, 1); + } + return itemInfo(lt, index); +} + + // ---------------- BoxLayoutHelper + class BoxLayoutHelper : public LayoutHelper { + public: + BoxLayoutHelper(const Qt::Orientation orientation) : m_orientation(orientation) {} + + virtual QRect itemInfo(QLayout *lt, int index) const; + virtual void insertWidget(QLayout *lt, const QRect &info, QWidget *w); + virtual void removeWidget(QLayout *lt, QWidget *widget); + virtual void replaceWidget(QLayout *lt, QWidget *before, QWidget *after); + + virtual void pushState(const QDesignerFormEditorInterface *, const QWidget *); + virtual void popState(const QDesignerFormEditorInterface *, QWidget *); + + virtual bool canSimplify(const QDesignerFormEditorInterface *, const QWidget *, const QRect &) const { return false; } + virtual void simplify(const QDesignerFormEditorInterface *, QWidget *, const QRect &) {} + + // Helper for restoring layout states + typedef QVector <QLayoutItem *> LayoutItemVector; + static LayoutItemVector disassembleLayout(QLayout *lt); + static QLayoutItem *findItemOfWidget(const LayoutItemVector &lv, QWidget *w); + + private: + typedef QVector<QWidget *> BoxLayoutState; + + static BoxLayoutState state(const QBoxLayout*lt); + + QStack<BoxLayoutState> m_states; + const Qt::Orientation m_orientation; + }; + + QRect BoxLayoutHelper::itemInfo(QLayout * /*lt*/, int index) const + { + return m_orientation == Qt::Horizontal ? QRect(index, 0, 1, 1) : QRect(0, index, 1, 1); + } + + void BoxLayoutHelper::insertWidget(QLayout *lt, const QRect &info, QWidget *w) + { + QDesignerWidgetItemInstaller wii; // Make sure we use QDesignerWidgetItem. + QBoxLayout *boxLayout = qobject_cast<QBoxLayout *>(lt); + Q_ASSERT(boxLayout); + boxLayout->insertWidget(m_orientation == Qt::Horizontal ? info.x() : info.y(), w); + } + + void BoxLayoutHelper::removeWidget(QLayout *lt, QWidget *widget) + { + QBoxLayout *boxLayout = qobject_cast<QBoxLayout *>(lt); + Q_ASSERT(boxLayout); + boxLayout->removeWidget(widget); + } + + void BoxLayoutHelper::replaceWidget(QLayout *lt, QWidget *before, QWidget *after) + { + bool ok = false; + QDesignerWidgetItemInstaller wii; // Make sure we use QDesignerWidgetItem. + if (QBoxLayout *boxLayout = qobject_cast<QBoxLayout *>(lt)) { + const int index = boxLayout->indexOf(before); + if (index != -1) { + const bool visible = before->isVisible(); + delete boxLayout->takeAt(index); + if (visible) + before->hide(); + before->setParent(0); + boxLayout->insertWidget(index, after); + ok = true; + } + } + if (!ok) + qWarning() << "BoxLayoutHelper::replaceWidget : Unable to replace " << before << " by " << after << " in " << lt; + } + + BoxLayoutHelper::BoxLayoutState BoxLayoutHelper::state(const QBoxLayout*lt) + { + BoxLayoutState rc; + if (const int count = lt->count()) { + rc.reserve(count); + for (int i = 0; i < count; i++) + if (QWidget *w = lt->itemAt(i)->widget()) + rc.push_back(w); + } + return rc; + } + + void BoxLayoutHelper::pushState(const QDesignerFormEditorInterface *core, const QWidget *w) + { + const QBoxLayout *boxLayout = qobject_cast<const QBoxLayout *>(LayoutInfo::managedLayout(core, w)); + Q_ASSERT(boxLayout); + m_states.push(state(boxLayout)); + } + + QLayoutItem *BoxLayoutHelper::findItemOfWidget(const LayoutItemVector &lv, QWidget *w) + { + const LayoutItemVector::const_iterator cend = lv.constEnd(); + for (LayoutItemVector::const_iterator it = lv.constBegin(); it != cend; ++it) + if ( (*it)->widget() == w) + return *it; + + return 0; + } + + BoxLayoutHelper::LayoutItemVector BoxLayoutHelper::disassembleLayout(QLayout *lt) + { + // Take items + const int count = lt->count(); + if (count == 0) + return LayoutItemVector(); + LayoutItemVector rc; + rc.reserve(count); + for (int i = count - 1; i >= 0; i--) + rc.push_back(lt->takeAt(i)); + return rc; + } + + void BoxLayoutHelper::popState(const QDesignerFormEditorInterface *core, QWidget *w) + { + QBoxLayout *boxLayout = qobject_cast<QBoxLayout *>(LayoutInfo::managedLayout(core, w)); + Q_ASSERT(boxLayout); + const BoxLayoutState savedState = m_states.pop(); + const BoxLayoutState currentState = state(boxLayout); + // Check for equality/empty. Note that this will currently + // always trigger as box layouts do not have a state apart from + // the order and there is no layout order editor yet. + if (savedState == state(boxLayout)) + return; + + const int count = savedState.size(); + Q_ASSERT(count == currentState.size()); + // Take items and reassemble in saved order + const LayoutItemVector items = disassembleLayout(boxLayout); + for (int i = 0; i < count; i++) { + QLayoutItem *item = findItemOfWidget(items, savedState[i]); + Q_ASSERT(item); + boxLayout->addItem(item); + } + } + + // Grid Layout state. Datatype storing the state of a GridLayout as a map of + // widgets to QRect(columns, rows) and size. Used to store the state for undo operations + // that do not change the widgets within the layout; also provides some manipulation + // functions and ability to apply the state to a layout provided its widgets haven't changed. + struct GridLayoutState { + GridLayoutState(); + + void fromLayout(QGridLayout *l); + void applyToLayout(const QDesignerFormEditorInterface *core, QWidget *w) const; + + void insertRow(int row); + void insertColumn(int column); + + bool simplify(const QRect &r, bool testOnly); + void removeFreeRow(int row); + void removeFreeColumn(int column); + + + // State of a cell in one dimension + enum DimensionCellState { + Free, + Spanned, // Item spans it + Occupied // Item bordering on it + }; + // Horiontal, Vertical pair of state + typedef QPair<DimensionCellState, DimensionCellState> CellState; + typedef QVector<CellState> CellStates; + + // Figure out states of a cell and return as a flat vector of + // [column1, column2,...] (address as row * columnCount + col) + static CellStates cellStates(const QList<QRect> &rects, int numRows, int numColumns); + + typedef QMap<QWidget *, QRect> WidgetItemMap; + typedef QMap<QWidget *, Qt::Alignment> WidgetAlignmentMap; + + WidgetItemMap widgetItemMap; + WidgetAlignmentMap widgetAlignmentMap; + + int rowCount; + int colCount; + }; + + static inline bool needsSpacerItem(const GridLayoutState::CellState &cs) { + return cs.first == GridLayoutState::Free && cs.second == GridLayoutState::Free; + } + + static inline QDebug operator<<(QDebug str, const GridLayoutState &gs) + { + str << "GridLayoutState: " << gs.rowCount << " rows x " << gs.colCount + << " cols " << gs.widgetItemMap.size() << " items\n"; + + const GridLayoutState::WidgetItemMap::const_iterator wcend = gs.widgetItemMap.constEnd(); + for (GridLayoutState::WidgetItemMap::const_iterator it = gs.widgetItemMap.constBegin(); it != wcend; ++it) + str << "Item " << it.key() << it.value() << '\n'; + return str; + } + + GridLayoutState::GridLayoutState() : + rowCount(0), + colCount(0) + { + } + + GridLayoutState::CellStates GridLayoutState::cellStates(const QList<QRect> &rects, int numRows, int numColumns) + { + CellStates rc = CellStates(numRows * numColumns, CellState(Free, Free)); + const QList<QRect>::const_iterator rcend = rects.constEnd(); + for (QList<QRect>::const_iterator it = rects.constBegin(); it != rcend; ++it) { + const int leftColumn = it->x(); + const int topRow = it->y(); + const int rightColumn = leftColumn + it->width() - 1; + const int bottomRow = topRow + it->height() - 1; + for (int r = topRow; r <= bottomRow; r++) + for (int c = leftColumn; c <= rightColumn; c++) { + const int flatIndex = r * numColumns + c; + // Bordering horizontally? + DimensionCellState &horizState = rc[flatIndex].first; + if (c == leftColumn || c == rightColumn) { + horizState = Occupied; + } else { + if (horizState < Spanned) + horizState = Spanned; + } + // Bordering vertically? + DimensionCellState &vertState = rc[flatIndex].second; + if (r == topRow || r == bottomRow) { + vertState = Occupied; + } else { + if (vertState < Spanned) + vertState = Spanned; + } + } + } + if (debugLayout) { + qDebug() << "GridLayoutState::cellStates: " << numRows << " x " << numColumns; + for (int r = 0; r < numRows; r++) + for (int c = 0; c < numColumns; c++) + qDebug() << " Row: " << r << " column: " << c << rc[r * numColumns + c]; + } + return rc; + } + + void GridLayoutState::fromLayout(QGridLayout *l) + { + rowCount = l->rowCount(); + colCount = l->columnCount(); + const int count = l->count(); + for (int i = 0; i < count; i++) { + QLayoutItem *item = l->itemAt(i); + if (!LayoutInfo::isEmptyItem(item)) { + widgetItemMap.insert(item->widget(), gridItemInfo(l, i)); + if (item->alignment()) + widgetAlignmentMap.insert(item->widget(), item->alignment()); + } + } + } + + void GridLayoutState::applyToLayout(const QDesignerFormEditorInterface *core, QWidget *w) const + { + typedef QMap<QLayoutItem *, QRect> LayoutItemRectMap; + QGridLayout *grid = qobject_cast<QGridLayout *>(LayoutInfo::managedLayout(core, w)); + Q_ASSERT(grid); + if (debugLayout) + qDebug() << ">GridLayoutState::applyToLayout" << *this << *grid; + const bool shrink = grid->rowCount() > rowCount || grid->columnCount() > colCount; + // Build a map of existing items to rectangles via widget map, delete spacers + LayoutItemRectMap itemMap; + while (grid->count()) { + QLayoutItem *item = grid->takeAt(0); + if (!LayoutInfo::isEmptyItem(item)) { + QWidget *itemWidget = item->widget(); + const WidgetItemMap::const_iterator it = widgetItemMap.constFind(itemWidget); + if (it == widgetItemMap.constEnd()) + qFatal("GridLayoutState::applyToLayout: Attempt to apply to a layout that has a widget '%s'/'%s' added after saving the state.", + itemWidget->metaObject()->className(), itemWidget->objectName().toUtf8().constData()); + itemMap.insert(item, it.value()); + } else { + delete item; + } + } + Q_ASSERT(itemMap.size() == widgetItemMap.size()); + // recreate if shrink + if (shrink) + grid = static_cast<QGridLayout*>(recreateManagedLayout(core, w, grid)); + + // Add widgets items + const LayoutItemRectMap::const_iterator icend = itemMap.constEnd(); + for (LayoutItemRectMap::const_iterator it = itemMap.constBegin(); it != icend; ++it) { + const QRect info = it.value(); + const Qt::Alignment alignment = widgetAlignmentMap.value(it.key()->widget(), Qt::Alignment(0)); + grid->addItem(it.key(), info.y(), info.x(), info.height(), info.width(), alignment); + } + // create spacers + const CellStates cs = cellStates(itemMap.values(), rowCount, colCount); + for (int r = 0; r < rowCount; r++) + for (int c = 0; c < colCount; c++) + if (needsSpacerItem(cs[r * colCount + c])) + grid->addItem(createGridSpacer(), r, c); + grid->activate(); + if (debugLayout) + qDebug() << "<GridLayoutState::applyToLayout" << *grid; + } + + void GridLayoutState::insertRow(int row) + { + rowCount++; + const WidgetItemMap::iterator iend = widgetItemMap.end(); + for (WidgetItemMap::iterator it = widgetItemMap.begin(); it != iend; ++it) { + const int topRow = it.value().y(); + if (topRow >= row) { + it.value().translate(0, 1); + } else { //Over it: Does it span it -> widen? + const int rowSpan = it.value().height(); + if (rowSpan > 1 && topRow + rowSpan > row) + it.value().setHeight(rowSpan + 1); + } + } + } + + void GridLayoutState::insertColumn(int column) + { + colCount++; + const WidgetItemMap::iterator iend = widgetItemMap.end(); + for (WidgetItemMap::iterator it = widgetItemMap.begin(); it != iend; ++it) { + const int leftColumn = it.value().x(); + if (leftColumn >= column) { + it.value().translate(1, 0); + } else { // Left of it: Does it span it -> widen? + const int colSpan = it.value().width(); + if (colSpan > 1 && leftColumn + colSpan > column) + it.value().setWidth(colSpan + 1); + } + } + } + + // Simplify: Remove empty columns/rows and such ones that are only spanned (shrink + // spanning items). + // 'AB.C.' 'ABC' + // 'DDDD.' ==> 'DDD' + // 'EF.G.' 'EFG' + bool GridLayoutState::simplify(const QRect &r, bool testOnly) + { + // figure out free rows/columns. + QVector<bool> occupiedRows(rowCount, false); + QVector<bool> occupiedColumns(colCount, false); + // Mark everything outside restriction rectangle as occupied + const int restrictionLeftColumn = r.x(); + const int restrictionRightColumn = restrictionLeftColumn + r.width(); + const int restrictionTopRow = r.y(); + const int restrictionBottomRow = restrictionTopRow + r.height(); + if (restrictionLeftColumn > 0 || restrictionRightColumn < colCount || + restrictionTopRow > 0 || restrictionBottomRow < rowCount) { + for (int r = 0; r < rowCount; r++) + if (r < restrictionTopRow || r >= restrictionBottomRow) + occupiedRows[r] = true; + for (int c = 0; c < colCount; c++) + if (c < restrictionLeftColumn || c >= restrictionRightColumn) + occupiedColumns[c] = true; + } + // figure out free fields and tick off occupied rows and columns + const CellStates cs = cellStates(widgetItemMap.values(), rowCount, colCount); + for (int r = 0; r < rowCount; r++) + for (int c = 0; c < colCount; c++) { + const CellState &state = cs[r * colCount + c]; + if (state.first == Occupied) + occupiedColumns[c] = true; + if (state.second == Occupied) + occupiedRows[r] = true; + } + // Any free rows/columns? + if (occupiedRows.indexOf(false) == -1 && occupiedColumns.indexOf(false) == -1) + return false; + if (testOnly) + return true; + // remove rows + for (int r = rowCount - 1; r >= 0; r--) + if (!occupiedRows[r]) + removeFreeRow(r); + // remove columns + for (int c = colCount - 1; c >= 0; c--) + if (!occupiedColumns[c]) + removeFreeColumn(c); + return true; + } + + void GridLayoutState::removeFreeRow(int removeRow) + { + const WidgetItemMap::iterator iend = widgetItemMap.end(); + for (WidgetItemMap::iterator it = widgetItemMap.begin(); it != iend; ++it) { + const int r = it.value().y(); + Q_ASSERT(r != removeRow); // Free rows only + if (r < removeRow) { // Does the item span it? - shrink it + const int rowSpan = it.value().height(); + if (rowSpan > 1) { + const int bottomRow = r + rowSpan; + if (bottomRow > removeRow) + it.value().setHeight(rowSpan - 1); + } + } else + if (r > removeRow) // Item below it? - move. + it.value().translate(0, -1); + } + rowCount--; + } + + void GridLayoutState::removeFreeColumn(int removeColumn) + { + const WidgetItemMap::iterator iend = widgetItemMap.end(); + for (WidgetItemMap::iterator it = widgetItemMap.begin(); it != iend; ++it) { + const int c = it.value().x(); + Q_ASSERT(c != removeColumn); // Free columns only + if (c < removeColumn) { // Does the item span it? - shrink it + const int colSpan = it.value().width(); + if (colSpan > 1) { + const int rightColumn = c + colSpan; + if (rightColumn > removeColumn) + it.value().setWidth(colSpan - 1); + } + } else + if (c > removeColumn) // Item to the right of it? - move. + it.value().translate(-1, 0); + } + colCount--; + } + + // ---------------- GridLayoutHelper + class GridLayoutHelper : public LayoutHelper { + public: + GridLayoutHelper() {} + + virtual QRect itemInfo(QLayout *lt, int index) const; + virtual void insertWidget(QLayout *lt, const QRect &info, QWidget *w); + virtual void removeWidget(QLayout *lt, QWidget *widget); + virtual void replaceWidget(QLayout *lt, QWidget *before, QWidget *after); + + virtual void pushState(const QDesignerFormEditorInterface *core, const QWidget *widgetWithManagedLayout); + virtual void popState(const QDesignerFormEditorInterface *core, QWidget *widgetWithManagedLayout); + + virtual bool canSimplify(const QDesignerFormEditorInterface *core, const QWidget *widgetWithManagedLayout, const QRect &restrictionArea) const; + virtual void simplify(const QDesignerFormEditorInterface *core, QWidget *widgetWithManagedLayout, const QRect &restrictionArea); + + static void insertRow(QGridLayout *grid, int row); + + private: + QStack<GridLayoutState> m_states; + }; + + void GridLayoutHelper::insertRow(QGridLayout *grid, int row) + { + GridLayoutState state; + state.fromLayout(grid); + state.insertRow(row); + QDesignerFormWindowInterface *fw = QDesignerFormWindowInterface::findFormWindow(grid); + state.applyToLayout(fw->core(), grid->parentWidget()); + } + + QRect GridLayoutHelper::itemInfo(QLayout * lt, int index) const + { + QGridLayout *grid = qobject_cast<QGridLayout *>(lt); + Q_ASSERT(grid); + return gridItemInfo(grid, index); + } + + void GridLayoutHelper::insertWidget(QLayout *lt, const QRect &info, QWidget *w) + { + QDesignerWidgetItemInstaller wii; // Make sure we use QDesignerWidgetItem. + QGridLayout *gridLayout = qobject_cast<QGridLayout *>(lt); + Q_ASSERT(gridLayout); + // check if there are any items. Should be only spacers, else something is wrong + const int row = info.y(); + int column = info.x(); + int colSpan = info.width(); + int rowSpan = info.height(); + // If not empty: A multiselection was dropped on an empty item, insert row + // and spread items along new row + if (!removeEmptyCellsOnGrid(gridLayout, info)) { + int freeColumn = -1; + colSpan = rowSpan = 1; + // First look to the right for a free column + const int columnCount = gridLayout->columnCount(); + for (int c = column; c < columnCount; c++) { + const int idx = findGridItemAt(gridLayout, row, c); + if (idx != -1 && LayoutInfo::isEmptyItem(gridLayout->itemAt(idx))) { + freeColumn = c; + break; + } + } + if (freeColumn != -1) { + removeEmptyCellsOnGrid(gridLayout, QRect(freeColumn, row, 1, 1)); + column = freeColumn; + } else { + GridLayoutHelper::insertRow(gridLayout, row); + column = 0; + } + } + gridLayout->addWidget(w, row , column, rowSpan, colSpan); + } + + void GridLayoutHelper::removeWidget(QLayout *lt, QWidget *widget) + { + QGridLayout *gridLayout = qobject_cast<QGridLayout *>(lt); + Q_ASSERT(gridLayout); + const int index = gridLayout->indexOf(widget); + if (index == -1) { + qWarning() << "GridLayoutHelper::removeWidget : Attempt to remove " << widget << " which is not in the layout."; + return; + } + // delete old item and pad with by spacer items + int row, column, rowspan, colspan; + gridLayout->getItemPosition(index, &row, &column, &rowspan, &colspan); + delete gridLayout->takeAt(index); + const int rightColumn = column + colspan; + const int bottomRow = row + rowspan; + for (int c = column; c < rightColumn; c++) + for (int r = row; r < bottomRow; r++) + gridLayout->addItem(createGridSpacer(), r, c); + } + + void GridLayoutHelper::replaceWidget(QLayout *lt, QWidget *before, QWidget *after) + { + bool ok = false; + QDesignerWidgetItemInstaller wii; // Make sure we use QDesignerWidgetItem. + if (QGridLayout *gridLayout = qobject_cast<QGridLayout *>(lt)) { + const int index = gridLayout->indexOf(before); + if (index != -1) { + int row, column, rowSpan, columnSpan; + gridLayout->getItemPosition (index, &row, &column, &rowSpan, &columnSpan); + const bool visible = before->isVisible(); + delete gridLayout->takeAt(index); + if (visible) + before->hide(); + before->setParent(0); + gridLayout->addWidget(after, row, column, rowSpan, columnSpan); + ok = true; + } + } + if (!ok) + qWarning() << "GridLayoutHelper::replaceWidget : Unable to replace " << before << " by " << after << " in " << lt; + } + + void GridLayoutHelper::pushState(const QDesignerFormEditorInterface *core, const QWidget *widgetWithManagedLayout) + { + QGridLayout *gridLayout = qobject_cast<QGridLayout *>(LayoutInfo::managedLayout(core, widgetWithManagedLayout)); + Q_ASSERT(gridLayout); + GridLayoutState gs; + gs.fromLayout(gridLayout); + m_states.push(gs); + } + + void GridLayoutHelper::popState(const QDesignerFormEditorInterface *core, QWidget *widgetWithManagedLayout) + { + Q_ASSERT(!m_states.empty()); + const GridLayoutState state = m_states.pop(); + state.applyToLayout(core, widgetWithManagedLayout); + } + + bool GridLayoutHelper::canSimplify(const QDesignerFormEditorInterface *core, const QWidget *widgetWithManagedLayout, const QRect &restrictionArea) const + { + QGridLayout *gridLayout = qobject_cast<QGridLayout *>(LayoutInfo::managedLayout(core, widgetWithManagedLayout)); + Q_ASSERT(gridLayout); + GridLayoutState gs; + gs.fromLayout(gridLayout); + return gs.simplify(restrictionArea, true); + } + + void GridLayoutHelper::simplify(const QDesignerFormEditorInterface *core, QWidget *widgetWithManagedLayout, const QRect &restrictionArea) + { + QGridLayout *gridLayout = qobject_cast<QGridLayout *>(LayoutInfo::managedLayout(core, widgetWithManagedLayout)); + Q_ASSERT(gridLayout); + if (debugLayout) + qDebug() << ">GridLayoutHelper::simplify" << *gridLayout; + GridLayoutState gs; + gs.fromLayout(gridLayout); + if (gs.simplify(restrictionArea, false)) + gs.applyToLayout(core, widgetWithManagedLayout); + if (debugLayout) + qDebug() << "<GridLayoutHelper::simplify" << *gridLayout; + } + + // ---------------- FormLayoutHelper + class FormLayoutHelper : public LayoutHelper { + public: + typedef QPair<QWidget *, QWidget *> WidgetPair; + typedef QVector<WidgetPair> FormLayoutState; + + FormLayoutHelper() {} + + virtual QRect itemInfo(QLayout *lt, int index) const; + virtual void insertWidget(QLayout *lt, const QRect &info, QWidget *w); + virtual void removeWidget(QLayout *lt, QWidget *widget); + virtual void replaceWidget(QLayout *lt, QWidget *before, QWidget *after); + + virtual void pushState(const QDesignerFormEditorInterface *core, const QWidget *widgetWithManagedLayout); + virtual void popState(const QDesignerFormEditorInterface *core, QWidget *widgetWithManagedLayout); + + virtual bool canSimplify(const QDesignerFormEditorInterface *core, const QWidget *, const QRect &) const; + virtual void simplify(const QDesignerFormEditorInterface *, QWidget *, const QRect &); + + private: + static FormLayoutState state(const QFormLayout *lt); + + QStack<FormLayoutState> m_states; + }; + + QRect FormLayoutHelper::itemInfo(QLayout * lt, int index) const + { + QFormLayout *form = qobject_cast<QFormLayout *>(lt); + Q_ASSERT(form); + int row, column, colspan; + getFormLayoutItemPosition(form, index, &row, &column, 0, &colspan); + return QRect(column, row, colspan, 1); + } + + void FormLayoutHelper::insertWidget(QLayout *lt, const QRect &info, QWidget *w) + { + if (debugLayout) + qDebug() << "FormLayoutHelper::insertWidget:" << w << info; + QDesignerWidgetItemInstaller wii; // Make sure we use QDesignerWidgetItem. + QFormLayout *formLayout = qobject_cast<QFormLayout *>(lt); + Q_ASSERT(formLayout); + // check if there are any nonspacer items? (Drop on 3rd column or drop of a multiselection + // on an empty item. As the Form layout does not have insert semantics; we need to manually insert a row + const bool insert = !removeEmptyCellsOnGrid(formLayout, info); + formLayoutAddWidget(formLayout, w, info, insert); + QLayoutSupport::createEmptyCells(formLayout); + } + + void FormLayoutHelper::removeWidget(QLayout *lt, QWidget *widget) + { + QFormLayout *formLayout = qobject_cast<QFormLayout *>(lt); + Q_ASSERT(formLayout); + const int index = formLayout->indexOf(widget); + if (index == -1) { + qWarning() << "FormLayoutHelper::removeWidget : Attempt to remove " << widget << " which is not in the layout."; + return; + } + // delete old item and pad with by spacer items + int row, column, colspan; + getFormLayoutItemPosition(formLayout, index, &row, &column, 0, &colspan); + if (debugLayout) + qDebug() << "FormLayoutHelper::removeWidget: #" << index << widget << " at " << row << column << colspan; + delete formLayout->takeAt(index); + if (colspan > 1 || column == 0) + formLayout->setItem(row, QFormLayout::LabelRole, createFormSpacer()); + if (colspan > 1 || column == 1) + formLayout->setItem(row, QFormLayout::FieldRole, createFormSpacer()); + } + + void FormLayoutHelper::replaceWidget(QLayout *lt, QWidget *before, QWidget *after) + { + bool ok = false; + QDesignerWidgetItemInstaller wii; // Make sure we use QDesignerWidgetItem. + if (QFormLayout *formLayout = qobject_cast<QFormLayout *>(lt)) { + const int index = formLayout->indexOf(before); + if (index != -1) { + int row; + QFormLayout::ItemRole role; + formLayout->getItemPosition (index, &row, &role); + const bool visible = before->isVisible(); + delete formLayout->takeAt(index); + if (visible) + before->hide(); + before->setParent(0); + formLayout->setWidget(row, role, after); + ok = true; + } + } + if (!ok) + qWarning() << "FormLayoutHelper::replaceWidget : Unable to replace " << before << " by " << after << " in " << lt; + } + + FormLayoutHelper::FormLayoutState FormLayoutHelper::state(const QFormLayout *lt) + { + const int rowCount = lt->rowCount(); + if (rowCount == 0) + return FormLayoutState(); + FormLayoutState rc(rowCount, WidgetPair(0, 0)); + const int count = lt->count(); + int row, column, colspan; + for (int i = 0; i < count; i++) { + QLayoutItem *item = lt->itemAt(i); + if (!LayoutInfo::isEmptyItem(item)) { + QWidget *w = item->widget(); + Q_ASSERT(w); + getFormLayoutItemPosition(lt, i, &row, &column, 0, &colspan); + if (colspan > 1 || column == 0) + rc[row].first = w; + if (colspan > 1 || column == 1) + rc[row].second = w; + } + } + if (debugLayout) { + qDebug() << "FormLayoutHelper::state: " << rowCount; + for (int r = 0; r < rowCount; r++) + qDebug() << " Row: " << r << rc[r].first << rc[r].second; + } + return rc; + } + + void FormLayoutHelper::pushState(const QDesignerFormEditorInterface *core, const QWidget *widgetWithManagedLayout) + { + QFormLayout *formLayout = qobject_cast<QFormLayout *>(LayoutInfo::managedLayout(core, widgetWithManagedLayout)); + Q_ASSERT(formLayout); + m_states.push(state(formLayout)); + } + + void FormLayoutHelper::popState(const QDesignerFormEditorInterface *core, QWidget *widgetWithManagedLayout) + { + QFormLayout *formLayout = qobject_cast<QFormLayout *>(LayoutInfo::managedLayout(core, widgetWithManagedLayout)); + Q_ASSERT(!m_states.empty() && formLayout); + + const FormLayoutState storedState = m_states.pop(); + const FormLayoutState currentState = state(formLayout); + if (currentState == storedState) + return; + const int rowCount = storedState.size(); + // clear out, shrink if required, but maintain items via map, pad spacers + const BoxLayoutHelper::LayoutItemVector items = BoxLayoutHelper::disassembleLayout(formLayout); + if (rowCount < formLayout->rowCount()) + formLayout = static_cast<QFormLayout*>(recreateManagedLayout(core, widgetWithManagedLayout, formLayout )); + for (int r = 0; r < rowCount; r++) { + QWidget *widgets[FormLayoutColumns] = { storedState[r].first, storedState[r].second }; + const bool spanning = widgets[0] != 0 && widgets[0] == widgets[1]; + if (spanning) { + formLayout->setWidget(r, QFormLayout::SpanningRole, widgets[0]); + } else { + for (int c = 0; c < FormLayoutColumns; c++) { + const QFormLayout::ItemRole role = c == 0 ? QFormLayout::LabelRole : QFormLayout::FieldRole; + if (widgets[c] && BoxLayoutHelper::findItemOfWidget(items, widgets[c])) { + formLayout->setWidget(r, role, widgets[c]); + } else { + formLayout->setItem(r, role, createFormSpacer()); + } + } + } + } + } + + bool FormLayoutHelper::canSimplify(const QDesignerFormEditorInterface *core, const QWidget *widgetWithManagedLayout, const QRect &restrictionArea) const + { + const QFormLayout *formLayout = qobject_cast<QFormLayout *>(LayoutInfo::managedLayout(core, widgetWithManagedLayout)); + Q_ASSERT(formLayout); + return canSimplifyFormLayout(formLayout, restrictionArea); + } + + void FormLayoutHelper::simplify(const QDesignerFormEditorInterface *core, QWidget *widgetWithManagedLayout, const QRect &restrictionArea) + { + typedef QPair<QLayoutItem*, QLayoutItem*> LayoutItemPair; + typedef QVector<LayoutItemPair> LayoutItemPairs; + + QFormLayout *formLayout = qobject_cast<QFormLayout *>(LayoutInfo::managedLayout(core, widgetWithManagedLayout)); + Q_ASSERT(formLayout); + if (debugLayout) + qDebug() << "FormLayoutHelper::simplify"; + // Transform into vector of item pairs + const int rowCount = formLayout->rowCount(); + LayoutItemPairs pairs(rowCount, LayoutItemPair(0, 0)); + for (int i = formLayout->count() - 1; i >= 0; i--) { + int row, col,colspan; + getFormLayoutItemPosition(formLayout, i, &row, &col, 0, &colspan); + if (colspan > 1) { + pairs[row].first = pairs[row].second = formLayout->takeAt(i); + } else { + if (col == 0) + pairs[row].first = formLayout->takeAt(i); + else + pairs[row].second = formLayout->takeAt(i); + } + } + // Weed out empty ones + const int bottomCheckRow = qMin(rowCount, restrictionArea.y() + restrictionArea.height()); + for (int r = bottomCheckRow - 1; r >= restrictionArea.y(); r--) + if (LayoutInfo::isEmptyItem(pairs[r].first) && LayoutInfo::isEmptyItem(pairs[r].second)) { + delete pairs[r].first; + delete pairs[r].second; + pairs.remove(r); + } + const int simpleRowCount = pairs.size(); + if (simpleRowCount < rowCount) + formLayout = static_cast<QFormLayout *>(recreateManagedLayout(core, widgetWithManagedLayout, formLayout)); + // repopulate + for (int r = 0; r < simpleRowCount; r++) { + const bool spanning = pairs[r].first == pairs[r].second; + if (spanning) { + formLayout->setItem(r, QFormLayout::SpanningRole, pairs[r].first); + } else { + formLayout->setItem(r, QFormLayout::LabelRole, pairs[r].first); + formLayout->setItem(r, QFormLayout::FieldRole, pairs[r].second); + } + } + } + +LayoutHelper *LayoutHelper::createLayoutHelper(int type) +{ + LayoutHelper *rc = 0; + switch (type) { + case LayoutInfo::HBox: + rc = new BoxLayoutHelper(Qt::Horizontal); + break; + case LayoutInfo::VBox: + rc = new BoxLayoutHelper(Qt::Vertical); + break; + case LayoutInfo::Grid: + rc = new GridLayoutHelper; + break; + case LayoutInfo::Form: + return new FormLayoutHelper; + default: + break; + } + Q_ASSERT(rc); + return rc; +} + +// ---- QLayoutSupport (LayoutDecorationExtension) +QLayoutSupport::QLayoutSupport(QDesignerFormWindowInterface *formWindow, QWidget *widget, LayoutHelper *helper, QObject *parent) : + QObject(parent), + m_formWindow(formWindow), + m_helper(helper), + m_widget(widget), + m_currentIndex(-1), + m_currentInsertMode(QDesignerLayoutDecorationExtension::InsertWidgetMode) +{ +} + +QLayout * QLayoutSupport::layout() const +{ + return LayoutInfo::managedLayout(m_formWindow->core(), m_widget); +} + +void QLayoutSupport::hideIndicator(Indicator i) +{ + if (m_indicators[i]) + m_indicators[i]->hide(); +} + +void QLayoutSupport::showIndicator(Indicator i, const QRect &geometry, const QPalette &p) +{ + if (!m_indicators[i]) + m_indicators[i] = new qdesigner_internal::InvisibleWidget(m_widget); + QWidget *indicator = m_indicators[i]; + indicator->setAutoFillBackground(true); + indicator->setPalette(p); + indicator->setGeometry(geometry); + indicator->show(); + indicator->raise(); +} + +QLayoutSupport::~QLayoutSupport() +{ + delete m_helper; + for (int i = 0; i < NumIndicators; i++) + if (m_indicators[i]) + m_indicators[i]->deleteLater(); +} + +QGridLayout * QLayoutSupport::gridLayout() const +{ + return qobject_cast<QGridLayout*>(LayoutInfo::managedLayout(m_formWindow->core(), m_widget)); +} + +QRect QLayoutSupport::itemInfo(int index) const +{ + return m_helper->itemInfo(LayoutInfo::managedLayout(m_formWindow->core(), m_widget), index); +} + +void QLayoutSupport::setInsertMode(InsertMode im) +{ + m_currentInsertMode = im; +} + +void QLayoutSupport::setCurrentCell(const QPair<int, int> &cell) +{ + m_currentCell = cell; +} + +void QLayoutSupport::adjustIndicator(const QPoint &pos, int index) +{ + if (index == -1) { // first item goes anywhere + hideIndicator(LeftIndicator); + hideIndicator(TopIndicator); + hideIndicator(RightIndicator); + hideIndicator(BottomIndicator); + return; + } + m_currentIndex = index; + m_currentInsertMode = QDesignerLayoutDecorationExtension::InsertWidgetMode; + + QLayoutItem *item = layout()->itemAt(index); + const QRect g = extendedGeometry(index); + // ### cleanup + if (LayoutInfo::isEmptyItem(item)) { + // Empty grid/form cell. Draw a rectangle + QPalette redPalette; + redPalette.setColor(QPalette::Window, Qt::red); + + showIndicator(LeftIndicator, QRect(g.x(), g.y(), indicatorSize, g.height()), redPalette); + showIndicator(TopIndicator, QRect(g.x(), g.y(), g.width(), indicatorSize), redPalette); + showIndicator(RightIndicator, QRect(g.right(), g.y(), indicatorSize, g.height()), redPalette); + showIndicator(BottomIndicator, QRect(g.x(), g.bottom(), g.width(), indicatorSize), redPalette); + setCurrentCellFromIndicatorOnEmptyCell(m_currentIndex); + } else { + // Append/Insert. Draw a bar left/right or above/below + QPalette bluePalette; + bluePalette.setColor(QPalette::Window, Qt::blue); + hideIndicator(LeftIndicator); + hideIndicator(TopIndicator); + + const int fromRight = g.right() - pos.x(); + const int fromBottom = g.bottom() - pos.y(); + + const int fromLeft = pos.x() - g.x(); + const int fromTop = pos.y() - g.y(); + + const int fromLeftRight = qMin(fromRight, fromLeft ); + const int fromBottomTop = qMin(fromBottom, fromTop); + + const Qt::Orientation indicatorOrientation = fromLeftRight < fromBottomTop ? Qt::Vertical : Qt::Horizontal; + + if (supportsIndicatorOrientation(indicatorOrientation)) { + const QRect r(layout()->geometry().topLeft(), layout()->parentWidget()->size()); + switch (indicatorOrientation) { + case Qt::Vertical: { + hideIndicator(BottomIndicator); + const bool closeToLeft = fromLeftRight == fromLeft; + showIndicator(RightIndicator, QRect(closeToLeft ? g.x() : g.right() + 1 - indicatorSize, 0, indicatorSize, r.height()), bluePalette); + + const int incr = closeToLeft ? 0 : +1; + setCurrentCellFromIndicator(indicatorOrientation, m_currentIndex, incr); + } + break; + case Qt::Horizontal: { + hideIndicator(RightIndicator); + const bool closeToTop = fromBottomTop == fromTop; + showIndicator(BottomIndicator, QRect(r.x(), closeToTop ? g.y() : g.bottom() + 1 - indicatorSize, r.width(), indicatorSize), bluePalette); + + const int incr = closeToTop ? 0 : +1; + setCurrentCellFromIndicator(indicatorOrientation, m_currentIndex, incr); + } + break; + } + } else { + hideIndicator(RightIndicator); + hideIndicator(BottomIndicator); + } // can handle indicatorOrientation + } +} + +int QLayoutSupport::indexOf(QLayoutItem *i) const +{ + const QLayout *lt = layout(); + if (!lt) + return -1; + + int index = 0; + + while (QLayoutItem *item = lt->itemAt(index)) { + if (item == i) + return index; + + ++index; + } + + return -1; +} + +int QLayoutSupport::indexOf(QWidget *widget) const +{ + const QLayout *lt = layout(); + if (!lt) + return -1; + + int index = 0; + while (QLayoutItem *item = lt->itemAt(index)) { + if (item->widget() == widget) + return index; + + ++index; + } + + return -1; +} + +QList<QWidget*> QLayoutSupport::widgets(QLayout *layout) const +{ + if (!layout) + return QList<QWidget*>(); + + QList<QWidget*> lst; + int index = 0; + while (QLayoutItem *item = layout->itemAt(index)) { + ++index; + + QWidget *widget = item->widget(); + if (widget && formWindow()->isManaged(widget)) + lst.append(widget); + } + + return lst; +} + +int QLayoutSupport::findItemAt(QGridLayout *gridLayout, int at_row, int at_column) +{ + return findGridItemAt(gridLayout, at_row, at_column); +} + +// Quick check whether simplify should be enabled for grids. May return false positives. +// Note: Calculating the occupied area does not work as spanning items may also be simplified. + +bool QLayoutSupport::canSimplifyQuickCheck(const QGridLayout *gl) +{ + if (!gl) + return false; + const int colCount = gl->columnCount(); + const int rowCount = gl->rowCount(); + if (colCount < 2 || rowCount < 2) + return false; + // try to find a spacer. + const int count = gl->count(); + for (int index = 0; index < count; index++) + if (LayoutInfo::isEmptyItem(gl->itemAt(index))) + return true; + return false; +} + +bool QLayoutSupport::canSimplifyQuickCheck(const QFormLayout *fl) +{ + return canSimplifyFormLayout(fl, QRect(QPoint(0, 0), QSize(32767, 32767))); +} + +// remove dummy spacers +bool QLayoutSupport::removeEmptyCells(QGridLayout *grid, const QRect &area) +{ + return removeEmptyCellsOnGrid(grid, area); +} + +void QLayoutSupport::createEmptyCells(QGridLayout *gridLayout) +{ + Q_ASSERT(gridLayout); + GridLayoutState gs; + gs.fromLayout(gridLayout); + + const GridLayoutState::CellStates cs = GridLayoutState::cellStates(gs.widgetItemMap.values(), gs.rowCount, gs.colCount); + for (int c = 0; c < gs.colCount; c++) + for (int r = 0; r < gs.rowCount; r++) + if (needsSpacerItem(cs[r * gs.colCount + c])) { + const int existingItemIndex = findItemAt(gridLayout, r, c); + if (existingItemIndex == -1) + gridLayout->addItem(createGridSpacer(), r, c); + } +} + +bool QLayoutSupport::removeEmptyCells(QFormLayout *formLayout, const QRect &area) +{ + return removeEmptyCellsOnGrid(formLayout, area); +} + +void QLayoutSupport::createEmptyCells(QFormLayout *formLayout) +{ + // No spanning items here.. + if (const int rowCount = formLayout->rowCount()) + for (int c = 0; c < FormLayoutColumns; c++) + for (int r = 0; r < rowCount; r++) + if (findGridItemAt(formLayout, r, c) == -1) + formLayout->setItem(r, c == 0 ? QFormLayout::LabelRole : QFormLayout::FieldRole, createFormSpacer()); +} + +int QLayoutSupport::findItemAt(const QPoint &pos) const +{ + if (!layout()) + return -1; + + const QLayout *lt = layout(); + const int count = lt->count(); + + if (count == 0) + return -1; + + int best = -1; + int bestIndex = -1; + + for (int index = 0; index < count; index++) { + QLayoutItem *item = lt->itemAt(index); + bool visible = true; + // When dragging widgets within layout, the source widget is invisible and must not be hit + if (const QWidget *w = item->widget()) + visible = w->isVisible(); + if (visible) { + const QRect g = item->geometry(); + + const int dist = (g.center() - pos).manhattanLength(); + if (best == -1 || dist < best) { + best = dist; + bestIndex = index; + } + } + } + return bestIndex; +} + +// ------------ QBoxLayoutSupport (LayoutDecorationExtension) +namespace { +class QBoxLayoutSupport: public QLayoutSupport +{ +public: + QBoxLayoutSupport(QDesignerFormWindowInterface *formWindow, QWidget *widget, Qt::Orientation orientation, QObject *parent = 0); + + virtual void insertWidget(QWidget *widget, const QPair<int, int> &cell); + virtual void removeWidget(QWidget *widget); + virtual void simplify() {} + virtual void insertRow(int /*row*/) {} + virtual void insertColumn(int /*column*/) {} + + virtual int findItemAt(int /*at_row*/, int /*at_column*/) const { return -1; } + +private: + virtual void setCurrentCellFromIndicatorOnEmptyCell(int index); + virtual void setCurrentCellFromIndicator(Qt::Orientation indicatorOrientation, int index, int increment); + virtual bool supportsIndicatorOrientation(Qt::Orientation indicatorOrientation) const; + virtual QRect extendedGeometry(int index) const; + + const Qt::Orientation m_orientation; +}; + +void QBoxLayoutSupport::removeWidget(QWidget *widget) +{ + QLayout *lt = layout(); + const int index = lt->indexOf(widget); + // Adjust the current cell in case a widget was dragged within the same layout to a position + // of higher index, which happens as follows: + // Drag start: The widget is hidden + // Drop: Current cell is stored, widget is removed and re-added, causing an index offset that needs to be compensated + QPair<int, int> currCell = currentCell(); + switch (m_orientation) { + case Qt::Horizontal: + if (currCell.second > 0 && index < currCell.second ) { + currCell.second--; + setCurrentCell(currCell); + } + break; + case Qt::Vertical: + if (currCell.first > 0 && index < currCell.first) { + currCell.first--; + setCurrentCell(currCell); + } + break; + } + helper()->removeWidget(lt, widget); +} + +QBoxLayoutSupport::QBoxLayoutSupport(QDesignerFormWindowInterface *formWindow, QWidget *widget, Qt::Orientation orientation, QObject *parent) : + QLayoutSupport(formWindow, widget, new BoxLayoutHelper(orientation), parent), + m_orientation(orientation) +{ +} + +void QBoxLayoutSupport::setCurrentCellFromIndicatorOnEmptyCell(int index) +{ + qDebug() << "QBoxLayoutSupport::setCurrentCellFromIndicatorOnEmptyCell(): Warning: found a fake spacer inside a vbox layout at " << index; + setCurrentCell(qMakePair(0, 0)); +} + +void QBoxLayoutSupport::insertWidget(QWidget *widget, const QPair<int, int> &cell) +{ + switch (m_orientation) { + case Qt::Horizontal: + helper()->insertWidget(layout(), QRect(cell.second, 0, 1, 1), widget); + break; + case Qt::Vertical: + helper()->insertWidget(layout(), QRect(0, cell.first, 1, 1), widget); + break; + } +} + +void QBoxLayoutSupport::setCurrentCellFromIndicator(Qt::Orientation indicatorOrientation, int index, int increment) +{ + if (m_orientation == Qt::Horizontal && indicatorOrientation == Qt::Vertical) { + setCurrentCell(qMakePair(0, index + increment)); + } else if (m_orientation == Qt::Vertical && indicatorOrientation == Qt::Horizontal) { + setCurrentCell(qMakePair(index + increment, 0)); + } +} + +bool QBoxLayoutSupport::supportsIndicatorOrientation(Qt::Orientation indicatorOrientation) const +{ + return m_orientation != indicatorOrientation; +} + +QRect QBoxLayoutSupport::extendedGeometry(int index) const +{ + QLayoutItem *item = layout()->itemAt(index); + // start off with item geometry + QRect g = item->geometry(); + + const QRect info = itemInfo(index); + + // On left border: extend to widget border + if (info.x() == 0) { + QPoint topLeft = g.topLeft(); + topLeft.rx() = layout()->geometry().left(); + g.setTopLeft(topLeft); + } + + // On top border: extend to widget border + if (info.y() == 0) { + QPoint topLeft = g.topLeft(); + topLeft.ry() = layout()->geometry().top(); + g.setTopLeft(topLeft); + } + + // is this the last item? + const QBoxLayout *box = static_cast<const QBoxLayout*>(layout()); + if (index < box->count() -1) + return g; // Nope. + + // extend to widget border + QPoint bottomRight = g.bottomRight(); + switch (m_orientation) { + case Qt::Vertical: + bottomRight.ry() = layout()->geometry().bottom(); + break; + case Qt::Horizontal: + bottomRight.rx() = layout()->geometry().right(); + break; + } + g.setBottomRight(bottomRight); + return g; +} + +// -------------- Base class for QGridLayout-like support classes (LayoutDecorationExtension) +template <class GridLikeLayout> +class GridLikeLayoutSupportBase: public QLayoutSupport +{ +public: + + GridLikeLayoutSupportBase(QDesignerFormWindowInterface *formWindow, QWidget *widget, LayoutHelper *helper, QObject *parent = 0) : + QLayoutSupport(formWindow, widget, helper, parent) {} + + void insertWidget(QWidget *widget, const QPair<int, int> &cell); + virtual void removeWidget(QWidget *widget) { helper()->removeWidget(layout(), widget); } + virtual int findItemAt(int row, int column) const; + +protected: + GridLikeLayout *gridLikeLayout() const { + return qobject_cast<GridLikeLayout*>(LayoutInfo::managedLayout(formWindow()->core(), widget())); + } + +private: + + virtual void setCurrentCellFromIndicatorOnEmptyCell(int index); + virtual void setCurrentCellFromIndicator(Qt::Orientation indicatorOrientation, int index, int increment); + virtual bool supportsIndicatorOrientation(Qt::Orientation) const { return true; } + + virtual QRect extendedGeometry(int index) const; + + // Overwrite to check the insertion position (if there are limits) + virtual void checkCellForInsertion(int * /*row*/, int * /*col*/) const {} +}; + +template <class GridLikeLayout> +void GridLikeLayoutSupportBase<GridLikeLayout>::setCurrentCellFromIndicatorOnEmptyCell(int index) +{ + GridLikeLayout *grid = gridLikeLayout(); + Q_ASSERT(grid); + + setInsertMode(InsertWidgetMode); + int row, column, rowspan, colspan; + + getGridItemPosition(grid, index, &row, &column, &rowspan, &colspan); + setCurrentCell(qMakePair(row, column)); +} + +template <class GridLikeLayout> +void GridLikeLayoutSupportBase<GridLikeLayout>::setCurrentCellFromIndicator(Qt::Orientation indicatorOrientation, int index, int increment) { + const QRect info = itemInfo(index); + switch (indicatorOrientation) { + case Qt::Vertical: { + setInsertMode(InsertColumnMode); + int row = info.top(); + int column = increment ? info.right() + 1 : info.left(); + checkCellForInsertion(&row, &column); + setCurrentCell(qMakePair(row , column)); + } + break; + case Qt::Horizontal: { + setInsertMode(InsertRowMode); + int row = increment ? info.bottom() + 1 : info.top(); + int column = info.left(); + checkCellForInsertion(&row, &column); + setCurrentCell(qMakePair(row, column)); + } + break; + } +} + +template <class GridLikeLayout> +void GridLikeLayoutSupportBase<GridLikeLayout>::insertWidget(QWidget *widget, const QPair<int, int> &cell) +{ + helper()->insertWidget(layout(), QRect(cell.second, cell.first, 1, 1), widget); +} + +template <class GridLikeLayout> +int GridLikeLayoutSupportBase<GridLikeLayout>::findItemAt(int at_row, int at_column) const +{ + GridLikeLayout *grid = gridLikeLayout(); + Q_ASSERT(grid); + return findGridItemAt(grid, at_row, at_column); +} + +template <class GridLikeLayout> +QRect GridLikeLayoutSupportBase<GridLikeLayout>::extendedGeometry(int index) const +{ + QLayoutItem *item = layout()->itemAt(index); + // start off with item geometry + QRect g = item->geometry(); + + const QRect info = itemInfo(index); + + // On left border: extend to widget border + if (info.x() == 0) { + QPoint topLeft = g.topLeft(); + topLeft.rx() = layout()->geometry().left(); + g.setTopLeft(topLeft); + } + + // On top border: extend to widget border + if (info.y() == 0) { + QPoint topLeft = g.topLeft(); + topLeft.ry() = layout()->geometry().top(); + g.setTopLeft(topLeft); + } + const GridLikeLayout *grid = gridLikeLayout(); + Q_ASSERT(grid); + + // extend to widget border + QPoint bottomRight = g.bottomRight(); + if (gridRowCount(grid) == info.y()) + bottomRight.ry() = layout()->geometry().bottom(); + if (gridColumnCount(grid) == info.x()) + bottomRight.rx() = layout()->geometry().right(); + g.setBottomRight(bottomRight); + return g; +} + +// -------------- QGridLayoutSupport (LayoutDecorationExtension) +class QGridLayoutSupport: public GridLikeLayoutSupportBase<QGridLayout> +{ +public: + + QGridLayoutSupport(QDesignerFormWindowInterface *formWindow, QWidget *widget, QObject *parent = 0); + + virtual void simplify(); + virtual void insertRow(int row); + virtual void insertColumn(int column); + +private: +}; + +QGridLayoutSupport::QGridLayoutSupport(QDesignerFormWindowInterface *formWindow, QWidget *widget, QObject *parent) : + GridLikeLayoutSupportBase<QGridLayout>(formWindow, widget, new GridLayoutHelper, parent) +{ +} + +void QGridLayoutSupport::insertRow(int row) +{ + QGridLayout *grid = gridLayout(); + Q_ASSERT(grid); + GridLayoutHelper::insertRow(grid, row); +} + +void QGridLayoutSupport::insertColumn(int column) +{ + QGridLayout *grid = gridLayout(); + Q_ASSERT(grid); + GridLayoutState state; + state.fromLayout(grid); + state.insertColumn(column); + state.applyToLayout(formWindow()->core(), widget()); +} + +void QGridLayoutSupport::simplify() +{ + QGridLayout *grid = gridLayout(); + Q_ASSERT(grid); + GridLayoutState state; + state.fromLayout(grid); + + const QRect fullArea = QRect(0, 0, state.colCount, state.rowCount); + if (state.simplify(fullArea, false)) + state.applyToLayout(formWindow()->core(), widget()); +} + +// -------------- QFormLayoutSupport (LayoutDecorationExtension) +class QFormLayoutSupport: public GridLikeLayoutSupportBase<QFormLayout> +{ +public: + QFormLayoutSupport(QDesignerFormWindowInterface *formWindow, QWidget *widget, QObject *parent = 0); + + virtual void simplify() {} + virtual void insertRow(int /*row*/) {} + virtual void insertColumn(int /*column*/) {} + +private: + virtual void checkCellForInsertion(int * row, int *col) const; +}; + +QFormLayoutSupport::QFormLayoutSupport(QDesignerFormWindowInterface *formWindow, QWidget *widget, QObject *parent) : + GridLikeLayoutSupportBase<QFormLayout>(formWindow, widget, new FormLayoutHelper, parent) +{ +} + +void QFormLayoutSupport::checkCellForInsertion(int *row, int *col) const +{ + if (*col >= FormLayoutColumns) { // Clamp to 2 columns + *col = 1; + (*row)++; + } +} +} // anonymous namespace + +QLayoutSupport *QLayoutSupport::createLayoutSupport(QDesignerFormWindowInterface *formWindow, QWidget *widget, QObject *parent) +{ + const QLayout *layout = LayoutInfo::managedLayout(formWindow->core(), widget); + Q_ASSERT(layout); + QLayoutSupport *rc = 0; + switch (LayoutInfo::layoutType(formWindow->core(), layout)) { + case LayoutInfo::HBox: + rc = new QBoxLayoutSupport(formWindow, widget, Qt::Horizontal, parent); + break; + case LayoutInfo::VBox: + rc = new QBoxLayoutSupport(formWindow, widget, Qt::Vertical, parent); + break; + case LayoutInfo::Grid: + rc = new QGridLayoutSupport(formWindow, widget, parent); + break; + case LayoutInfo::Form: + rc = new QFormLayoutSupport(formWindow, widget, parent); + break; + default: + break; + } + Q_ASSERT(rc); + return rc; +} +} // namespace qdesigner_internal + +// -------------- QLayoutWidget +QLayoutWidget::QLayoutWidget(QDesignerFormWindowInterface *formWindow, QWidget *parent) + : QWidget(parent), m_formWindow(formWindow), + m_leftMargin(0), m_topMargin(0), m_rightMargin(0), m_bottomMargin(0) +{ +} + +void QLayoutWidget::paintEvent(QPaintEvent*) +{ + if (m_formWindow->currentTool() != 0) + return; + + // only draw red borders if we're editting widgets + + QPainter p(this); + + QMap<int, QMap<int, bool> > excludedRowsForColumn; + QMap<int, QMap<int, bool> > excludedColumnsForRow; + + QLayout *lt = layout(); + QGridLayout *grid = qobject_cast<QGridLayout *>(lt); + if (lt) { + if (const int count = lt->count()) { + p.setPen(QPen(QColor(255, 0, 0, 35), 1)); + for (int i = 0; i < count; i++) { + QLayoutItem *item = lt->itemAt(i); + if (grid) { + int row, column, rowSpan, columnSpan; + grid->getItemPosition(i, &row, &column, &rowSpan, &columnSpan); + QMap<int, bool> rows; + QMap<int, bool> columns; + for (int i = rowSpan; i > 1; i--) + rows[row + i - 2] = true; + for (int i = columnSpan; i > 1; i--) + columns[column + i - 2] = true; + + while (rowSpan > 0) { + excludedColumnsForRow[row + rowSpan - 1].unite(columns); + rowSpan--; + } + while (columnSpan > 0) { + excludedRowsForColumn[column + columnSpan - 1].unite(rows); + columnSpan--; + } + } + if (item->spacerItem()) { + const QRect geometry = item->geometry(); + if (!geometry.isNull()) + p.drawRect(geometry.adjusted(1, 1, -2, -2)); + } + } + } + } + if (grid) { + p.setPen(QPen(QColor(0, 0x80, 0, 0x80), 1)); + const int rowCount = grid->rowCount(); + const int columnCount = grid->columnCount(); + for (int i = 0; i < rowCount; i++) { + for (int j = 0; j < columnCount; j++) { + const QRect cellRect = grid->cellRect(i, j); + if (j < columnCount - 1 && excludedColumnsForRow.value(i).value(j, false) == false) { + const double y0 = (i == 0) + ? 0 : (grid->cellRect(i - 1, j).bottom() + cellRect.top()) / 2.0; + const double y1 = (i == rowCount - 1) + ? height() - 1 : (cellRect.bottom() + grid->cellRect(i + 1, j).top()) / 2.0; + const double x = (cellRect.right() + grid->cellRect(i, j + 1).left()) / 2.0; + p.drawLine(QPointF(x, y0), QPointF(x, y1)); + } + if (i < rowCount - 1 && excludedRowsForColumn.value(j).value(i, false) == false) { + const double x0 = (j == 0) + ? 0 : (grid->cellRect(i, j - 1).right() + cellRect.left()) / 2.0; + const double x1 = (j == columnCount - 1) + ? width() - 1 : (cellRect.right() + grid->cellRect(i, j + 1).left()) / 2.0; + const double y = (cellRect.bottom() + grid->cellRect(i + 1, j).top()) / 2.0; + p.drawLine(QPointF(x0, y), QPointF(x1, y)); + } + } + } + } + p.setPen(QPen(QColor(255, 0, 0, 128), 1)); + p.drawRect(0, 0, width() - 1, height() - 1); +} + +bool QLayoutWidget::event(QEvent *e) +{ + switch (e->type()) { + case QEvent::LayoutRequest: { + (void) QWidget::event(e); + // Magic: We are layouted, but the parent is not.. + if (layout() && qdesigner_internal::LayoutInfo::layoutType(formWindow()->core(), parentWidget()) == qdesigner_internal::LayoutInfo::NoLayout) { + resize(layout()->totalMinimumSize().expandedTo(size())); + } + + update(); + + return true; + } + + default: + break; + } + + return QWidget::event(e); +} + +int QLayoutWidget::layoutLeftMargin() const +{ + if (m_leftMargin < 0 && layout()) { + int margin; + layout()->getContentsMargins(&margin, 0, 0, 0); + return margin; + } + return m_leftMargin; +} + +void QLayoutWidget::setLayoutLeftMargin(int layoutMargin) +{ + m_leftMargin = layoutMargin; + if (layout()) { + int newMargin = m_leftMargin; + if (newMargin >= 0 && newMargin < ShiftValue) + newMargin = ShiftValue; + int left, top, right, bottom; + layout()->getContentsMargins(&left, &top, &right, &bottom); + layout()->setContentsMargins(newMargin, top, right, bottom); + } +} + +int QLayoutWidget::layoutTopMargin() const +{ + if (m_topMargin < 0 && layout()) { + int margin; + layout()->getContentsMargins(0, &margin, 0, 0); + return margin; + } + return m_topMargin; +} + +void QLayoutWidget::setLayoutTopMargin(int layoutMargin) +{ + m_topMargin = layoutMargin; + if (layout()) { + int newMargin = m_topMargin; + if (newMargin >= 0 && newMargin < ShiftValue) + newMargin = ShiftValue; + int left, top, right, bottom; + layout()->getContentsMargins(&left, &top, &right, &bottom); + layout()->setContentsMargins(left, newMargin, right, bottom); + } +} + +int QLayoutWidget::layoutRightMargin() const +{ + if (m_rightMargin < 0 && layout()) { + int margin; + layout()->getContentsMargins(0, 0, &margin, 0); + return margin; + } + return m_rightMargin; +} + +void QLayoutWidget::setLayoutRightMargin(int layoutMargin) +{ + m_rightMargin = layoutMargin; + if (layout()) { + int newMargin = m_rightMargin; + if (newMargin >= 0 && newMargin < ShiftValue) + newMargin = ShiftValue; + int left, top, right, bottom; + layout()->getContentsMargins(&left, &top, &right, &bottom); + layout()->setContentsMargins(left, top, newMargin, bottom); + } +} + +int QLayoutWidget::layoutBottomMargin() const +{ + if (m_bottomMargin < 0 && layout()) { + int margin; + layout()->getContentsMargins(0, 0, 0, &margin); + return margin; + } + return m_bottomMargin; +} + +void QLayoutWidget::setLayoutBottomMargin(int layoutMargin) +{ + m_bottomMargin = layoutMargin; + if (layout()) { + int newMargin = m_bottomMargin; + if (newMargin >= 0 && newMargin < ShiftValue) + newMargin = ShiftValue; + int left, top, right, bottom; + layout()->getContentsMargins(&left, &top, &right, &bottom); + layout()->setContentsMargins(left, top, right, newMargin); + } +} + +QT_END_NAMESPACE |