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Diffstat (limited to 'src/gui/kernel/qformlayout.cpp')
| -rw-r--r-- | src/gui/kernel/qformlayout.cpp | 2079 |
1 files changed, 0 insertions, 2079 deletions
diff --git a/src/gui/kernel/qformlayout.cpp b/src/gui/kernel/qformlayout.cpp deleted file mode 100644 index d098c01f0f..0000000000 --- a/src/gui/kernel/qformlayout.cpp +++ /dev/null @@ -1,2079 +0,0 @@ -/**************************************************************************** -** -** 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 QtGui module 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 "qapplication.h" -#include "qdebug.h" -#include "qformlayout.h" -#include "qlabel.h" -#include "qlayout_p.h" -#include "qlayoutengine_p.h" -#include "qrect.h" -#include "qvector.h" -#include "qwidget.h" - -QT_BEGIN_NAMESPACE - -namespace { -// Fixed column matrix, stores items as [i11, i12, i21, i22...], -// with FORTRAN-style index operator(r, c). -template <class T, int NumColumns> -class FixedColumnMatrix { -public: - typedef QVector<T> Storage; - - FixedColumnMatrix() { } - - void clear() { m_storage.clear(); } - - const T &operator()(int r, int c) const { return m_storage[r * NumColumns + c]; } - T &operator()(int r, int c) { return m_storage[r * NumColumns + c]; } - - int rowCount() const { return m_storage.size() / NumColumns; } - void addRow(const T &value); - void insertRow(int r, const T &value); - void removeRow(int r); - - bool find(const T &value, int *rowPtr, int *colPtr) const ; - int count(const T &value) const { return m_storage.count(value); } - - // Hmmpf.. Some things are faster that way. - const Storage &storage() const { return m_storage; } - - static void storageIndexToPosition(int idx, int *rowPtr, int *colPtr); - -private: - Storage m_storage; -}; - -template <class T, int NumColumns> -void FixedColumnMatrix<T, NumColumns>::addRow(const T &value) -{ - for (int i = 0; i < NumColumns; ++i) - m_storage.append(value); -} - -template <class T, int NumColumns> -void FixedColumnMatrix<T, NumColumns>::insertRow(int r, const T &value) -{ - Q_TYPENAME Storage::iterator it = m_storage.begin(); - it += r * NumColumns; - m_storage.insert(it, NumColumns, value); -} - -template <class T, int NumColumns> -void FixedColumnMatrix<T, NumColumns>::removeRow(int r) -{ - m_storage.remove(r * NumColumns, NumColumns); -} - -template <class T, int NumColumns> -bool FixedColumnMatrix<T, NumColumns>::find(const T &value, int *rowPtr, int *colPtr) const -{ - const int idx = m_storage.indexOf(value); - if (idx == -1) - return false; - storageIndexToPosition(idx, rowPtr, colPtr); - return true; -} - -template <class T, int NumColumns> -void FixedColumnMatrix<T, NumColumns>::storageIndexToPosition(int idx, int *rowPtr, int *colPtr) -{ - *rowPtr = idx / NumColumns; - *colPtr = idx % NumColumns; -} -} // namespace - -// special values for unset fields; must not clash with values of FieldGrowthPolicy or -// RowWrapPolicy -const uint DefaultFieldGrowthPolicy = 255; -const uint DefaultRowWrapPolicy = 255; - -enum { ColumnCount = 2 }; - -// -- our data structure for our items -// This owns the QLayoutItem -struct QFormLayoutItem -{ - QFormLayoutItem(QLayoutItem* i) : item(i), fullRow(false), isHfw(false) { } - ~QFormLayoutItem() { delete item; } - - // Wrappers - QWidget *widget() const { return item->widget(); } - QLayout *layout() const { return item->layout(); } - - bool hasHeightForWidth() const { return item->hasHeightForWidth(); } - int heightForWidth(int width) const { return item->heightForWidth(width); } - int minimumHeightForWidth(int width) const { return item->minimumHeightForWidth(width); } - Qt::Orientations expandingDirections() const { return item->expandingDirections(); } - QSizePolicy::ControlTypes controlTypes() const { return item->controlTypes(); } - int vStretch() const { return widget() ? widget()->sizePolicy().verticalStretch() : 0; } - - void setGeometry(const QRect& r) { item->setGeometry(r); } - QRect geometry() const { return item->geometry(); } - - // For use with FixedColumnMatrix - bool operator==(const QFormLayoutItem& other) { return item == other.item; } - - QLayoutItem *item; - bool fullRow; - - // set by updateSizes - bool isHfw; - QSize minSize; - QSize sizeHint; - QSize maxSize; - - // also set by updateSizes - int sbsHSpace; // only used for side by side, for the field item only (not label) - int vSpace; // This is the spacing to the item in the row above - - // set by setupVerticalLayoutData - bool sideBySide; - int vLayoutIndex; - - // set by setupHorizontalLayoutData - int layoutPos; - int layoutWidth; -}; - -class QFormLayoutPrivate : public QLayoutPrivate -{ - Q_DECLARE_PUBLIC(QFormLayout) - -public: - typedef FixedColumnMatrix<QFormLayoutItem *, ColumnCount> ItemMatrix; - - QFormLayoutPrivate(); - ~QFormLayoutPrivate() { } - - int insertRow(int row); - void insertRows(int row, int count); - void setItem(int row, QFormLayout::ItemRole role, QLayoutItem *item); - void setLayout(int row, QFormLayout::ItemRole role, QLayout *layout); - void setWidget(int row, QFormLayout::ItemRole role, QWidget *widget); - - void arrangeWidgets(const QVector<QLayoutStruct>& layouts, QRect &rect); - - void updateSizes(); - - void setupVerticalLayoutData(int width); - void setupHorizontalLayoutData(int width); - - QStyle* getStyle() const; - - inline bool haveHfwCached(int width) const - { - return (hfw_width == width) || (width == sh_width && hfw_sh_height >= 0); - } - - void recalcHFW(int w); - void setupHfwLayoutData(); - - uint fieldGrowthPolicy : 8; - uint rowWrapPolicy : 8; - uint has_hfw : 2; - uint dirty : 2; // have we laid out yet? - uint sizesDirty : 2; // have we (not) gathered layout item sizes? - uint expandVertical : 1; // Do we expand vertically? - uint expandHorizontal : 1; // Do we expand horizonally? - Qt::Alignment labelAlignment; - Qt::Alignment formAlignment; - - ItemMatrix m_matrix; - QList<QFormLayoutItem *> m_things; - - int layoutWidth; // the last width that we called setupVerticalLayoutData on (for vLayouts) - - int hfw_width; // the last width we calculated HFW for - int hfw_height; // what that height was - int hfw_minheight; // what that minheight was - - int hfw_sh_height; // the hfw for sh_width - int hfw_sh_minheight; // the minhfw for sh_width - - int min_width; // the width that gets turned into minSize (from updateSizes) - int sh_width; // the width that gets turned into prefSize (from updateSizes) - int thresh_width; // the width that we start splitting label/field pairs at (from updateSizes) - QSize minSize; - QSize prefSize; - int formMaxWidth; - void calcSizeHints(); - - QVector<QLayoutStruct> vLayouts; // set by setupVerticalLayoutData; - int vLayoutCount; // Number of rows we calculated in setupVerticalLayoutData - int maxLabelWidth; // the label width we calculated in setupVerticalLayoutData - - QVector<QLayoutStruct> hfwLayouts; - - int hSpacing; - int vSpacing; -}; - -QFormLayoutPrivate::QFormLayoutPrivate() - : fieldGrowthPolicy(DefaultFieldGrowthPolicy), - rowWrapPolicy(DefaultRowWrapPolicy), has_hfw(false), dirty(true), sizesDirty(true), - expandVertical(0), expandHorizontal(0), labelAlignment(0), formAlignment(0), - layoutWidth(-1), hfw_width(-1), hfw_sh_height(-1), min_width(-1), - sh_width(-1), thresh_width(QLAYOUTSIZE_MAX), hSpacing(-1), vSpacing(-1) -{ -} - -static Qt::Alignment fixedAlignment(Qt::Alignment alignment, Qt::LayoutDirection layoutDirection) -{ - if (layoutDirection == Qt::RightToLeft && alignment & Qt::AlignAbsolute) { - // swap left and right, and eliminate absolute flag - return Qt::Alignment((alignment & ~(Qt::AlignLeft | Qt::AlignRight | Qt::AlignAbsolute)) - | ((alignment & Qt::AlignRight) ? Qt::AlignLeft : 0) - | ((alignment & Qt::AlignLeft) ? Qt::AlignRight : 0)); - } else { - return alignment & ~Qt::AlignAbsolute; - } -} - -static int storageIndexFromLayoutItem(const QFormLayoutPrivate::ItemMatrix &m, - QFormLayoutItem *item) -{ - if (item) { - return m.storage().indexOf(item); - } else { - return -1; - } -} - -static void updateFormLayoutItem(QFormLayoutItem *item, int userVSpacing, - QFormLayout::FieldGrowthPolicy fieldGrowthPolicy, - bool fullRow) -{ - item->minSize = item->item->minimumSize(); - item->sizeHint = item->item->sizeHint(); - item->maxSize = item->item->maximumSize(); - - if (!fullRow && (fieldGrowthPolicy == QFormLayout::FieldsStayAtSizeHint - || (fieldGrowthPolicy == QFormLayout::ExpandingFieldsGrow - && !(item->item->expandingDirections() & Qt::Horizontal)))) - item->maxSize.setWidth(item->sizeHint.width()); - - item->isHfw = item->item->hasHeightForWidth(); - item->vSpace = userVSpacing; -} - -/* - Iterate over all the controls and gather their size information - (min, sizeHint and max). Also work out what the spacing between - pairs of controls should be, and figure out the min and sizeHint - widths. -*/ -void QFormLayoutPrivate::updateSizes() -{ - Q_Q(QFormLayout); - - if (sizesDirty) { - QFormLayout::RowWrapPolicy wrapPolicy = q->rowWrapPolicy(); - bool wrapAllRows = (wrapPolicy == QFormLayout::WrapAllRows); - bool dontWrapRows = (wrapPolicy == QFormLayout::DontWrapRows); - int rr = m_matrix.rowCount(); - - has_hfw = false; - - // If any control can expand, so can this layout - // Wrapping doesn't affect expansion, though, just the minsize - bool expandH = false; - bool expandV = false; - - QFormLayoutItem *prevLbl = 0; - QFormLayoutItem *prevFld = 0; - - QWidget *parent = q->parentWidget(); - QStyle *style = parent ? parent->style() : 0; - - int userVSpacing = q->verticalSpacing(); - int userHSpacing = wrapAllRows ? 0 : q->horizontalSpacing(); - - int maxMinLblWidth = 0; - int maxMinFldWidth = 0; // field with label - int maxMinIfldWidth = 0; // independent field - - int maxShLblWidth = 0; - int maxShFldWidth = 0; - int maxShIfldWidth = 0; - - for (int i = 0; i < rr; ++i) { - QFormLayoutItem *label = m_matrix(i, 0); - QFormLayoutItem *field = m_matrix(i, 1); - - // Skip empty rows - if (!label && !field) - continue; - - if (label) { - updateFormLayoutItem(label, userVSpacing, q->fieldGrowthPolicy(), false); - if (label->isHfw) - has_hfw = true; - Qt::Orientations o = label->expandingDirections(); - - if (o & Qt::Vertical) - expandV = true; - if (o & Qt::Horizontal) - expandH = true; - } - if (field) { - updateFormLayoutItem(field, userVSpacing, q->fieldGrowthPolicy(), !label && field->fullRow); - field->sbsHSpace = (!label && field->fullRow) ? 0 : userHSpacing; - if (field->isHfw) - has_hfw = true; - - Qt::Orientations o = field->expandingDirections(); - - if (o & Qt::Vertical) - expandV = true; - if (o & Qt::Horizontal) - expandH = true; - } - - // See if we need to calculate default spacings - if ((userHSpacing < 0 || userVSpacing < 0) && style) { - QSizePolicy::ControlTypes lbltypes = - QSizePolicy::ControlTypes(label ? label->controlTypes() : QSizePolicy::DefaultType); - QSizePolicy::ControlTypes fldtypes = - QSizePolicy::ControlTypes(field ? field->controlTypes() : QSizePolicy::DefaultType); - - // VSpacing - if (userVSpacing < 0) { - if (wrapAllRows) { - // label spacing is to a previous item - QFormLayoutItem *lbltop = prevFld ? prevFld : prevLbl; - // field spacing is to the label (or a previous item) - QFormLayoutItem *fldtop = label ? label : lbltop; - QSizePolicy::ControlTypes lbltoptypes = - QSizePolicy::ControlTypes(lbltop ? lbltop->controlTypes() : QSizePolicy::DefaultType); - QSizePolicy::ControlTypes fldtoptypes = - QSizePolicy::ControlTypes(fldtop ? fldtop->controlTypes() : QSizePolicy::DefaultType); - if (label && lbltop) - label->vSpace = style->combinedLayoutSpacing(lbltoptypes, lbltypes, Qt::Vertical, 0, parent); - if (field && fldtop) - field->vSpace = style->combinedLayoutSpacing(fldtoptypes, fldtypes, Qt::Vertical, 0, parent); - } else { - // Side by side.. we have to also consider the spacings to empty cells, which can strangely be more than - // non empty cells.. - QFormLayoutItem *lbltop = prevLbl ? prevLbl : prevFld; - QFormLayoutItem *fldtop = prevFld; - QSizePolicy::ControlTypes lbltoptypes = - QSizePolicy::ControlTypes(lbltop ? lbltop->controlTypes() : QSizePolicy::DefaultType); - QSizePolicy::ControlTypes fldtoptypes = - QSizePolicy::ControlTypes(fldtop ? fldtop->controlTypes() : QSizePolicy::DefaultType); - - // To be compatible to QGridLayout, we have to compare solitary labels & fields with both predecessors - if (label) { - if (!field) { - int lblspacing = style->combinedLayoutSpacing(lbltoptypes, lbltypes, Qt::Vertical, 0, parent); - int fldspacing = style->combinedLayoutSpacing(fldtoptypes, lbltypes, Qt::Vertical, 0, parent); - label->vSpace = qMax(lblspacing, fldspacing); - } else - label->vSpace = style->combinedLayoutSpacing(lbltoptypes, lbltypes, Qt::Vertical, 0, parent); - } - - if (field) { - // check spacing against both the previous label and field - if (!label) { - int lblspacing = style->combinedLayoutSpacing(lbltoptypes, fldtypes, Qt::Vertical, 0, parent); - int fldspacing = style->combinedLayoutSpacing(fldtoptypes, fldtypes, Qt::Vertical, 0, parent); - field->vSpace = qMax(lblspacing, fldspacing); - } else - field->vSpace = style->combinedLayoutSpacing(fldtoptypes, fldtypes, Qt::Vertical, 0, parent); - } - } - } - - // HSpacing - // hard-coded the left and right control types so that all the rows have the same - // inter-column spacing (otherwise the right column isn't always left aligned) - if (userHSpacing < 0 && !wrapAllRows && (label || !field->fullRow) && field) - field->sbsHSpace = style->combinedLayoutSpacing(QSizePolicy::Label, QSizePolicy::LineEdit, Qt::Horizontal, 0, parent); - } - - // Now update our min/sizehint widths - // We choose to put the spacing in the field side in sbs, so - // the right edge of the labels will align, but fields may - // be a little ragged.. since different controls may have - // different appearances, a slight raggedness in the left - // edges of fields can be tolerated. - // (Note - field->sbsHSpace is 0 for WrapAllRows mode) - if (label) { - maxMinLblWidth = qMax(maxMinLblWidth, label->minSize.width()); - maxShLblWidth = qMax(maxShLblWidth, label->sizeHint.width()); - if (field) { - maxMinFldWidth = qMax(maxMinFldWidth, field->minSize.width() + field->sbsHSpace); - maxShFldWidth = qMax(maxShFldWidth, field->sizeHint.width() + field->sbsHSpace); - } - } else if (field) { - maxMinIfldWidth = qMax(maxMinIfldWidth, field->minSize.width()); - maxShIfldWidth = qMax(maxShIfldWidth, field->sizeHint.width()); - } - - prevLbl = label; - prevFld = field; - } - - // Now, finally update the min/sizeHint widths - if (wrapAllRows) { - sh_width = qMax(maxShLblWidth, qMax(maxShIfldWidth, maxShFldWidth)); - min_width = qMax(maxMinLblWidth, qMax(maxMinIfldWidth, maxMinFldWidth)); - // in two line, we don't care as much about the threshold width - thresh_width = 0; - } else if (dontWrapRows) { - // This is just the max widths glommed together - sh_width = qMax(maxShLblWidth + maxShFldWidth, maxShIfldWidth); - min_width = qMax(maxMinLblWidth + maxMinFldWidth, maxMinIfldWidth); - thresh_width = QWIDGETSIZE_MAX; - } else { - // This is just the max widths glommed together - sh_width = qMax(maxShLblWidth + maxShFldWidth, maxShIfldWidth); - // min width needs to be the min when everything is wrapped, - // otherwise we'll never get set with a width that causes wrapping - min_width = qMax(maxMinLblWidth, qMax(maxMinIfldWidth, maxMinFldWidth)); - // We split a pair at label sh + field min (### for now..) - thresh_width = maxShLblWidth + maxMinFldWidth; - } - - // Update the expansions - expandVertical = expandV; - expandHorizontal = expandH; - } - sizesDirty = false; -} - -void QFormLayoutPrivate::recalcHFW(int w) -{ - setupHfwLayoutData(); - - int h = 0; - int mh = 0; - - for (int r = 0; r < vLayoutCount; ++r) { - int spacing = hfwLayouts.at(r).spacing; - h += hfwLayouts.at(r).sizeHint + spacing; - mh += hfwLayouts.at(r).minimumSize + spacing; - } - - if (sh_width > 0 && sh_width == w) { - hfw_sh_height = qMin(QLAYOUTSIZE_MAX, h); - hfw_sh_minheight = qMin(QLAYOUTSIZE_MAX, mh); - } else { - hfw_width = w; - hfw_height = qMin(QLAYOUTSIZE_MAX, h); - hfw_minheight = qMin(QLAYOUTSIZE_MAX, mh); - } -} - -void QFormLayoutPrivate::setupHfwLayoutData() -{ - // setupVerticalLayoutData must be called before this - // setupHorizontalLayoutData must also be called before this - // copies non hfw data into hfw - // then updates size and min - - - // Note: QGridLayout doesn't call minimumHeightForWidth, - // but instead uses heightForWidth for both min and sizeHint. - // For the common case where minimumHeightForWidth just calls - // heightForWidth, we do the calculation twice, which can be - // very expensive for word wrapped QLabels/QTextEdits, for example. - // So we just use heightForWidth as well. - int i; - int rr = m_matrix.rowCount(); - - hfwLayouts.clear(); - hfwLayouts.resize(vLayoutCount); - for (i = 0; i < vLayoutCount; ++i) - hfwLayouts[i] = vLayouts.at(i); - - for (i = 0; i < rr; ++i) { - QFormLayoutItem *label = m_matrix(i, 0); - QFormLayoutItem *field = m_matrix(i, 1); - - if (label) { - if (label->isHfw) { - // We don't check sideBySide here, since a label is only - // ever side by side with its field - int hfw = label->heightForWidth(label->layoutWidth); - hfwLayouts[label->vLayoutIndex].minimumSize = hfw; - hfwLayouts[label->vLayoutIndex].sizeHint = hfw; - } else { - // Reset these here, so the field can do a qMax below (the previous value may have - // been the fields non-hfw values, which are often larger than hfw) - hfwLayouts[label->vLayoutIndex].sizeHint = label->sizeHint.height(); - hfwLayouts[label->vLayoutIndex].minimumSize = label->minSize.height(); - } - } - - if (field) { - int hfw = field->isHfw ? field->heightForWidth(field->layoutWidth) : 0; - int h = field->isHfw ? hfw : field->sizeHint.height(); - int mh = field->isHfw ? hfw : field->minSize.height(); - - if (field->sideBySide) { - int oh = hfwLayouts.at(field->vLayoutIndex).sizeHint; - int omh = hfwLayouts.at(field->vLayoutIndex).minimumSize; - - hfwLayouts[field->vLayoutIndex].sizeHint = qMax(h, oh); - hfwLayouts[field->vLayoutIndex].minimumSize = qMax(mh, omh); - } else { - hfwLayouts[field->vLayoutIndex].sizeHint = h; - hfwLayouts[field->vLayoutIndex].minimumSize = mh; - } - } - } -} - -/* - Given up to four items involved in a vertical spacing calculation - (two rows * two columns), return the max vertical spacing for the - row containing item1 (which may also include item2) - We assume parent and item1 are not null. - - If a particular row is split, then the spacings for that row and - the following row are affected, and this function should be - called with recalculate = true for both rows (note: only rows with both - a label and a field can be split). - - In particular: - - 1) the split label's row vspace needs to be changed to qMax(label/prevLabel, label/prevField) - [call with item1 = label, item2 = null, prevItem1 & prevItem2 as before] - 2) the split field's row vspace needs to be changed to the label/field spacing - [call with item1 = field, item2 = null, prevItem1 = label, prevItem2 = null] - - [if the next row has one item, 'item'] - 3a) the following row's vspace needs to be changed to item/field spacing (would - previously been the qMax(item/label, item/field) spacings) - [call with item1 = item, item2 = null, prevItem1 = field, prevItem2 = null] - - [if the next row has two items, 'label2' and 'field2'] - 3b) the following row's vspace needs to be changed to be qMax(field/label2, field/field2) spacing - [call with item1 = label2, item2 = field2, prevItem1 = field, prevItem2 = null] - - In the (common) non split case, we can just use the precalculated vspace (possibly qMaxed between - label and field). - - If recalculate is true, we expect: - - parent != null - - item1 != null - - item2 can be null - - prevItem1 can be null - - if item2 is not null, prevItem2 will be null (e.g. steps 1 or 3 above) - - if prevItem1 is null, prevItem2 will be null -*/ -static inline int spacingHelper(QWidget* parent, QStyle *style, int userVSpacing, bool recalculate, QFormLayoutItem* item1, QFormLayoutItem* item2, QFormLayoutItem* prevItem1, QFormLayoutItem *prevItem2) -{ - int spacing = userVSpacing; - if (spacing < 0) { - if (!recalculate) { - if (item1) - spacing = item1->vSpace; - if (item2) - spacing = qMax(spacing, item2->vSpace); - } else { - if (style && prevItem1) { - QSizePolicy::ControlTypes itemtypes = - QSizePolicy::ControlTypes(item1 ? item1->controlTypes() : QSizePolicy::DefaultType); - int spacing2 = 0; - - spacing = style->combinedLayoutSpacing(itemtypes, prevItem1->controlTypes(), Qt::Vertical, 0, parent); - - // At most of one of item2 and prevItem2 will be nonnull - if (item2) - spacing2 = style->combinedLayoutSpacing(item2->controlTypes(), prevItem1->controlTypes(), Qt::Vertical, 0, parent); - else if (prevItem2) - spacing2 = style->combinedLayoutSpacing(itemtypes, prevItem2->controlTypes(), Qt::Vertical, 0, parent); - - spacing = qMax(spacing, spacing2); - } - } - } else { - if (prevItem1) { - QWidget *wid = prevItem1->item->widget(); - if (wid) - spacing = qMax(spacing, prevItem1->geometry().top() - wid->geometry().top() ); - } - if (prevItem2) { - QWidget *wid = prevItem2->item->widget(); - if (wid) - spacing = qMax(spacing, prevItem2->geometry().top() - wid->geometry().top() ); - } - } - return spacing; -} - -static inline void initLayoutStruct(QLayoutStruct& sl, QFormLayoutItem* item) -{ - sl.init(item->vStretch(), item->minSize.height()); - sl.sizeHint = item->sizeHint.height(); - sl.maximumSize = item->maxSize.height(); - sl.expansive = (item->expandingDirections() & Qt::Vertical); - sl.empty = false; -} - -void QFormLayoutPrivate::setupVerticalLayoutData(int width) -{ - Q_Q(QFormLayout); - - // Early out if we have no changes that would cause a change in vertical layout - if ((width == layoutWidth || (width >= thresh_width && layoutWidth >= thresh_width)) && !dirty && !sizesDirty) - return; - - layoutWidth = width; - - int rr = m_matrix.rowCount(); - int vidx = 1; - QFormLayout::RowWrapPolicy rowWrapPolicy = q->rowWrapPolicy(); - bool wrapAllRows = (rowWrapPolicy == QFormLayout::WrapAllRows); - bool addTopBottomStretch = true; - - vLayouts.clear(); - vLayouts.resize((2 * rr) + 2); // a max, some may be unused - - QStyle *style = 0; - - int userVSpacing = q->verticalSpacing(); - - if (userVSpacing < 0) { - if (QWidget *widget = q->parentWidget()) - style = widget->style(); - } - - // make sure our sizes are up to date - updateSizes(); - - // Grab the widest label width here - // This might be different from the value computed during - // sizeHint/minSize, since we don't count label/field pairs that - // are split. - maxLabelWidth = 0; - if (!wrapAllRows) { - for (int i = 0; i < rr; ++i) { - const QFormLayoutItem *label = m_matrix(i, 0); - const QFormLayoutItem *field = m_matrix(i, 1); - if (label && (label->sizeHint.width() + (field ? field->minSize.width() : 0) <= width)) - maxLabelWidth = qMax(maxLabelWidth, label->sizeHint.width()); - } - } else { - maxLabelWidth = width; - } - - QFormLayoutItem *prevItem1 = 0; - QFormLayoutItem *prevItem2 = 0; - bool prevRowSplit = false; - - for (int i = 0; i < rr; ++i) { - QFormLayoutItem *label = m_matrix(i, 0); - QFormLayoutItem *field = m_matrix(i, 1); - - // Totally ignore empty rows... - if (!label && !field) - continue; - - QSize min1; - QSize min2; - QSize sh1; - QSize sh2; - if (label) { - min1 = label->minSize; - sh1 = label->sizeHint; - } - if (field) { - min2 = field->minSize; - sh2 = field->sizeHint; - } - - // In separate lines, we make a vLayout for everything that isn't null - // in side by side, we only separate label/field if we're going to wrap it - bool splitSideBySide = (rowWrapPolicy == QFormLayout::WrapLongRows) - && ((maxLabelWidth < sh1.width()) || (width < (maxLabelWidth + min2.width()))); - - if (wrapAllRows || splitSideBySide) { - if (label) { - initLayoutStruct(vLayouts[vidx], label); - - if (vidx > 1) - vLayouts[vidx - 1].spacing = spacingHelper(q->parentWidget(), style, userVSpacing, splitSideBySide || prevRowSplit, label, 0, prevItem1, prevItem2); - - label->vLayoutIndex = vidx; - label->sideBySide = false; - - prevItem1 = label; - prevItem2 = 0; - - if (vLayouts[vidx].stretch > 0) - addTopBottomStretch = false; - - ++vidx; - } - - if (field) { - initLayoutStruct(vLayouts[vidx], field); - - if (vidx > 1) - vLayouts[vidx - 1].spacing = spacingHelper(q->parentWidget(), style, userVSpacing, splitSideBySide || prevRowSplit, field, 0, prevItem1, prevItem2); - - field->vLayoutIndex = vidx; - field->sideBySide = false; - - prevItem1 = field; - prevItem2 = 0; - - if (vLayouts[vidx].stretch > 0) - addTopBottomStretch = false; - - ++vidx; - } - - prevRowSplit = splitSideBySide; - } else { - // we're in side by side mode, and we have enough space to do that - QSize max1(QWIDGETSIZE_MAX, QWIDGETSIZE_MAX); - QSize max2(QWIDGETSIZE_MAX, QWIDGETSIZE_MAX); - - int stretch1 = 0; - int stretch2 = 0; - bool expanding = false; - - if (label) { - max1 = label->maxSize; - if (label->expandingDirections() & Qt::Vertical) - expanding = true; - - label->sideBySide = (field != 0); - label->vLayoutIndex = vidx; - stretch1 = label->vStretch(); - } - - if (field) { - max2 = field->maxSize; - if (field->expandingDirections() & Qt::Vertical) - expanding = true; - - field->sideBySide = (label || !field->fullRow); - field->vLayoutIndex = vidx; - stretch2 = field->vStretch(); - } - - vLayouts[vidx].init(qMax(stretch1, stretch2), qMax(min1.height(), min2.height())); - vLayouts[vidx].sizeHint = qMax(sh1.height(), sh2.height()); - vLayouts[vidx].maximumSize = qMin(max1.height(), max2.height()); - vLayouts[vidx].expansive = expanding || (vLayouts[vidx].stretch > 0); - vLayouts[vidx].empty = false; - - if (vLayouts[vidx].stretch > 0) - addTopBottomStretch = false; - - if (vidx > 1) - vLayouts[vidx - 1].spacing = spacingHelper(q->parentWidget(), style, userVSpacing, prevRowSplit, label, field, prevItem1, prevItem2); - - if (label) { - prevItem1 = label; - prevItem2 = field; - } else { - prevItem1 = field; - prevItem2 = 0; - } - - prevRowSplit = false; - ++vidx; - } - } - - if (addTopBottomStretch) { - Qt::Alignment formAlignment = q->formAlignment(); - - if (!(formAlignment & Qt::AlignBottom)) { - // AlignTop (default if unspecified) or AlignVCenter: We add a stretch at the bottom - vLayouts[vidx].init(1, 0); - vLayouts[vidx].expansive = true; - ++vidx; - } - - if (formAlignment & (Qt::AlignVCenter | Qt::AlignBottom)) { - // AlignVCenter or AlignBottom: We add a stretch at the top - vLayouts[0].init(1, 0); - vLayouts[0].expansive = true; - } else { - vLayouts[0].init(0, 0); - } - } else { - vLayouts[0].init(0, 0); - } - - vLayoutCount = vidx; - dirty = false; -} - -void QFormLayoutPrivate::setupHorizontalLayoutData(int width) -{ - Q_Q(QFormLayout); - - // requires setupVerticalLayoutData to be called first - - int fieldMaxWidth = 0; - - int rr = m_matrix.rowCount(); - bool wrapAllRows = (q->rowWrapPolicy() == QFormLayout::WrapAllRows); - - for (int i = 0; i < rr; ++i) { - QFormLayoutItem *label = m_matrix(i, 0); - QFormLayoutItem *field = m_matrix(i, 1); - - // Totally ignore empty rows... - if (!label && !field) - continue; - - if (label) { - // if there is a field, and we're side by side, we use maxLabelWidth - // otherwise we just use the sizehint - label->layoutWidth = (field && label->sideBySide) ? maxLabelWidth : label->sizeHint.width(); - label->layoutPos = 0; - } - - if (field) { - // This is the default amount allotted to fields in sbs - int fldwidth = width - maxLabelWidth - field->sbsHSpace; - - // If we've split a row, we still decide to align - // the field with all the other field if it will fit - // Fields in sbs mode get the remnants of the maxLabelWidth - if (!field->sideBySide) { - if (wrapAllRows || (!label && field->fullRow) || field->sizeHint.width() > fldwidth) { - field->layoutWidth = width; - field->layoutPos = 0; - } else { - field->layoutWidth = fldwidth; - field->layoutPos = width - fldwidth; - } - } else { - // We're sbs, so we should have a label - field->layoutWidth = fldwidth; - field->layoutPos = width - fldwidth; - } - - fieldMaxWidth = qMax(fieldMaxWidth, field->maxSize.width()); - } - } - - formMaxWidth = maxLabelWidth + fieldMaxWidth; -} - -void QFormLayoutPrivate::calcSizeHints() -{ - Q_Q(QFormLayout); - - int leftMargin, topMargin, rightMargin, bottomMargin; - q->getContentsMargins(&leftMargin, &topMargin, &rightMargin, &bottomMargin); - - updateSizes(); - setupVerticalLayoutData(QLAYOUTSIZE_MAX); - // Don't need to call setupHorizontal here - - int h = topMargin + bottomMargin; - int mh = topMargin + bottomMargin; - - // The following are set in updateSizes - int w = sh_width + leftMargin + rightMargin; - int mw = min_width + leftMargin + rightMargin; - - for (int i = 0; i < vLayoutCount; ++i) { - int spacing = vLayouts.at(i).spacing; - h += vLayouts.at(i).sizeHint + spacing; - mh += vLayouts.at(i).minimumSize + spacing; - } - - minSize.rwidth() = qMin(mw, QLAYOUTSIZE_MAX); - minSize.rheight() = qMin(mh, QLAYOUTSIZE_MAX); - prefSize.rwidth() = qMin(w, QLAYOUTSIZE_MAX); - prefSize.rheight() = qMin(h, QLAYOUTSIZE_MAX); -} - -int QFormLayoutPrivate::insertRow(int row) -{ - int rowCnt = m_matrix.rowCount(); - if (uint(row) > uint(rowCnt)) - row = rowCnt; - - insertRows(row, 1); - return row; -} - -void QFormLayoutPrivate::insertRows(int row, int count) -{ - while (count > 0) { - m_matrix.insertRow(row, 0); - --count; - } -} - -void QFormLayoutPrivate::setItem(int row, QFormLayout::ItemRole role, QLayoutItem *item) -{ - const bool fullRow = role == QFormLayout::SpanningRole; - const int column = role == QFormLayout::SpanningRole ? 1 : static_cast<int>(role); - if (uint(row) >= uint(m_matrix.rowCount()) || uint(column) > 1U) { - qWarning("QFormLayoutPrivate::setItem: Invalid cell (%d, %d)", row, column); - return; - } - - if (!item) - return; - - if (m_matrix(row, column)) { - qWarning("QFormLayoutPrivate::setItem: Cell (%d, %d) already occupied", row, column); - return; - } - - QFormLayoutItem *i = new QFormLayoutItem(item); - i->fullRow = fullRow; - m_matrix(row, column) = i; - - m_things.append(i); -} - -void QFormLayoutPrivate::setLayout(int row, QFormLayout::ItemRole role, QLayout *layout) -{ - if (layout) { - Q_Q(QFormLayout); - q->addChildLayout(layout); - setItem(row, role, layout); - } -} - -void QFormLayoutPrivate::setWidget(int row, QFormLayout::ItemRole role, QWidget *widget) -{ - if (widget) { - Q_Q(QFormLayout); - q->addChildWidget(widget); - setItem(row, role, QLayoutPrivate::createWidgetItem(q, widget)); - } -} - -QStyle* QFormLayoutPrivate::getStyle() const -{ - Q_Q(const QFormLayout); - - // ### cache - if (QWidget *parentWidget = q->parentWidget()) - return parentWidget->style(); - else - return QApplication::style(); -} - -/*! - \class QFormLayout - \since 4.4 - \brief The QFormLayout class manages forms of input widgets and their associated labels. - - \ingroup geomanagement - - - QFormLayout is a convenience layout class that lays out its - children in a two-column form. The left column consists of labels - and the right column consists of "field" widgets (line editors, - spin boxes, etc.). - - Traditionally, such two-column form layouts were achieved using - QGridLayout. QFormLayout is a higher-level alternative that - provides the following advantages: - - \list - \o \bold{Adherence to the different platform's look and feel guidelines.} - - For example, the - \l{Mac OS X Aqua} and KDE guidelines specify that the - labels should be right-aligned, whereas Windows and GNOME - applications normally use left-alignment. - - \o \bold{Support for wrapping long rows.} - - For devices with small displays, QFormLayout can be set to - \l{WrapLongRows}{wrap long rows}, or even to - \l{WrapAllRows}{wrap all rows}. - - \o \bold{Convenient API for creating label--field pairs.} - - The addRow() overload that takes a QString and a QWidget * - creates a QLabel behind the scenes and automatically set up - its buddy. We can then write code like this: - - \snippet doc/src/snippets/code/src_gui_kernel_qformlayout.cpp 0 - - Compare this with the following code, written using QGridLayout: - - \snippet doc/src/snippets/code/src_gui_kernel_qformlayout.cpp 1 - \endlist - - The table below shows the default appearance in different styles. - - \table - \header - \o QCommonStyle derived styles (except QPlastiqueStyle) - \o QMacStyle - \o QPlastiqueStyle - \o Qt Extended styles - \row - \o \inlineimage qformlayout-win.png - \o \inlineimage qformlayout-mac.png - \o \inlineimage qformlayout-kde.png - \o \inlineimage qformlayout-qpe.png - \row - \o Traditional style used for Windows, GNOME, and earlier - versions of KDE. Labels are left aligned, and expanding - fields grow to fill the available space. (This normally - corresponds to what we would get using a two-column - QGridLayout.) - \o Style based on the - \l{Mac OS X Aqua} guidelines. Labels are right-aligned, - the fields don't grow beyond their size hint, and the - form is horizontally centered. - \o Recommended style for - \l{KDE applications}. Similar to MacStyle, except that the form - is left-aligned and all fields grow to fill the available - space. - \o Default style for Qt Extended styles. Labels are right-aligned, - expanding fields grow to fill the available space, and row - wrapping is enabled for long lines. - \endtable - - The form styles can be also be overridden individually by calling - setLabelAlignment(), setFormAlignment(), setFieldGrowthPolicy(), - and setRowWrapPolicy(). For example, to simulate the form layout - appearance of QMacStyle on all platforms, but with left-aligned - labels, you could write: - - \snippet doc/src/snippets/code/src_gui_kernel_qformlayout.cpp 2 - - \sa QGridLayout, QBoxLayout, QStackedLayout -*/ - - -/*! - \enum QFormLayout::FieldGrowthPolicy - - This enum specifies the different policies that can be used to - control the way in which the form's fields grow. - - \value FieldsStayAtSizeHint - The fields never grow beyond their - \l{QWidgetItem::sizeHint()}{effective size hint}. This is - the default for QMacStyle. - - \value ExpandingFieldsGrow - Fields with an horizontal \l{QSizePolicy}{size policy} of - \l{QSizePolicy::}{Expanding} or - \l{QSizePolicy::}{MinimumExpanding} will grow to fill the - available space. The other fields will not grow beyond - their effective size hint. This is the default policy for - Plastique. - - \value AllNonFixedFieldsGrow - All fields with a size policy that allows them to grow - will grow to fill the available space. This is the default - policy for most styles. - - \sa fieldGrowthPolicy -*/ - -/*! - \enum QFormLayout::RowWrapPolicy - - This enum specifies the different policies that can be used to - control the way in which the form's rows wrap. - - \value DontWrapRows - Fields are always laid out next to their label. This is - the default policy for all styles except Qt Extended styles - and QS60Style. - - \value WrapLongRows - Labels are given enough horizontal space to fit the widest label, - and the rest of the space is given to the fields. If the minimum - size of a field pair is wider than the available space, the field - is wrapped to the next line. This is the default policy for - Qt Extended styles and and QS60Style. - - \value WrapAllRows - Fields are always laid out below their label. - - \sa rowWrapPolicy -*/ - -/*! - \enum QFormLayout::ItemRole - - This enum specifies the types of widgets (or other layout items) - that may appear in a row. - - \value LabelRole A label widget. - \value FieldRole A field widget. - \value SpanningRole A widget that spans label and field columns. - - \sa itemAt(), getItemPosition() -*/ - -/*! - Constructs a new form layout with the given \a parent widget. - - \sa QWidget::setLayout() -*/ -QFormLayout::QFormLayout(QWidget *parent) - : QLayout(*new QFormLayoutPrivate, 0, parent) -{ -} - -/*! - Destroys the form layout. -*/ -QFormLayout::~QFormLayout() -{ - Q_D(QFormLayout); - - /* - The clearing and destruction order here is important. We start by clearing - m_things so that QLayout and the rest of the world know that we don't babysit - the layout items anymore and don't care if they are destroyed. - */ - d->m_things.clear(); - qDeleteAll(d->m_matrix.storage()); - d->m_matrix.clear(); -} - -/*! - Adds a new row to the bottom of this form layout, with the given - \a label and \a field. - - \sa insertRow() -*/ -void QFormLayout::addRow(QWidget *label, QWidget *field) -{ - insertRow(-1, label, field); -} - -/*! - \overload -*/ -void QFormLayout::addRow(QWidget *label, QLayout *field) -{ - insertRow(-1, label, field); -} - -/*! - \overload - - This overload automatically creates a QLabel behind the scenes - with \a labelText as its text. The \a field is set as the new - QLabel's \l{QLabel::setBuddy()}{buddy}. -*/ -void QFormLayout::addRow(const QString &labelText, QWidget *field) -{ - insertRow(-1, labelText, field); -} - -/*! - \overload - - This overload automatically creates a QLabel behind the scenes - with \a labelText as its text. -*/ -void QFormLayout::addRow(const QString &labelText, QLayout *field) -{ - insertRow(-1, labelText, field); -} - -/*! - \overload - - Adds the specified \a widget at the end of this form layout. The - \a widget spans both columns. -*/ -void QFormLayout::addRow(QWidget *widget) -{ - insertRow(-1, widget); -} - -/*! - \overload - - Adds the specified \a layout at the end of this form layout. The - \a layout spans both columns. -*/ -void QFormLayout::addRow(QLayout *layout) -{ - insertRow(-1, layout); -} - -/*! - Inserts a new row at position \a row in this form layout, with - the given \a label and \a field. If \a row is out of bounds, the - new row is added at the end. - - \sa addRow() -*/ -void QFormLayout::insertRow(int row, QWidget *label, QWidget *field) -{ - Q_D(QFormLayout); - - row = d->insertRow(row); - if (label) - d->setWidget(row, LabelRole, label); - if (field) - d->setWidget(row, FieldRole, field); - invalidate(); -} - -/*! - \overload -*/ -void QFormLayout::insertRow(int row, QWidget *label, QLayout *field) -{ - Q_D(QFormLayout); - - row = d->insertRow(row); - if (label) - d->setWidget(row, LabelRole, label); - if (field) - d->setLayout(row, FieldRole, field); - invalidate(); -} - -/*! - \overload - - This overload automatically creates a QLabel behind the scenes - with \a labelText as its text. The \a field is set as the new - QLabel's \l{QLabel::setBuddy()}{buddy}. -*/ -void QFormLayout::insertRow(int row, const QString &labelText, QWidget *field) -{ - QLabel *label = 0; - if (!labelText.isEmpty()) { - label = new QLabel(labelText); -#ifndef QT_NO_SHORTCUT - label->setBuddy(field); -#endif - } - insertRow(row, label, field); -} - -/*! - \overload - - This overload automatically creates a QLabel behind the scenes - with \a labelText as its text. -*/ -void QFormLayout::insertRow(int row, const QString &labelText, QLayout *field) -{ - insertRow(row, labelText.isEmpty() ? 0 : new QLabel(labelText), field); -} - -/*! - \overload - - Inserts the specified \a widget at position \a row in this form - layout. The \a widget spans both columns. If \a row is out of - bounds, the widget is added at the end. -*/ -void QFormLayout::insertRow(int row, QWidget *widget) -{ - Q_D(QFormLayout); - - if (!widget) { - qWarning("QFormLayout: Cannot add null field to %s", qPrintable(objectName())); - return; - } - - row = d->insertRow(row); - d->setWidget(row, SpanningRole, widget); - invalidate(); -} - -/*! - \overload - - Inserts the specified \a layout at position \a row in this form - layout. The \a layout spans both columns. If \a row is out of - bounds, the widget is added at the end. -*/ -void QFormLayout::insertRow(int row, QLayout *layout) -{ - Q_D(QFormLayout); - - if (!layout) { - qWarning("QFormLayout: Cannot add null field to %s", qPrintable(objectName())); - return; - } - - row = d->insertRow(row); - d->setLayout(row, SpanningRole, layout); - invalidate(); -} - -/*! - \reimp -*/ -void QFormLayout::addItem(QLayoutItem *item) -{ - Q_D(QFormLayout); - - int row = d->insertRow(d->m_matrix.rowCount()); - d->setItem(row, FieldRole, item); - invalidate(); -} - -/*! - \reimp -*/ -int QFormLayout::count() const -{ - Q_D(const QFormLayout); - return d->m_things.count(); -} - -/*! - \reimp -*/ -QLayoutItem *QFormLayout::itemAt(int index) const -{ - Q_D(const QFormLayout); - if (QFormLayoutItem *formItem = d->m_things.value(index)) - return formItem->item; - return 0; -} - -/*! - \reimp -*/ -QLayoutItem *QFormLayout::takeAt(int index) -{ - Q_D(QFormLayout); - - const int storageIndex = storageIndexFromLayoutItem(d->m_matrix, d->m_things.value(index)); - if (storageIndex == -1) { - qWarning("QFormLayout::takeAt: Invalid index %d", index); - return 0; - } - - int row, col; - QFormLayoutPrivate::ItemMatrix::storageIndexToPosition(storageIndex, &row, &col); - Q_ASSERT(d->m_matrix(row, col)); - - QFormLayoutItem *item = d->m_matrix(row, col); - Q_ASSERT(item); - d->m_things.removeAt(index); - d->m_matrix(row, col) = 0; - - invalidate(); - - // grab ownership back from the QFormLayoutItem - QLayoutItem *i = item->item; - item->item = 0; - delete item; - return i; -} - -/*! - \reimp -*/ -Qt::Orientations QFormLayout::expandingDirections() const -{ - Q_D(const QFormLayout); - QFormLayoutPrivate *e = const_cast<QFormLayoutPrivate *>(d); - e->updateSizes(); - - Qt::Orientations o = 0; - if (e->expandHorizontal) - o = Qt::Horizontal; - if (e->expandVertical) - o |= Qt::Vertical; - return o; -} - -/*! - \reimp -*/ -bool QFormLayout::hasHeightForWidth() const -{ - Q_D(const QFormLayout); - QFormLayoutPrivate *e = const_cast<QFormLayoutPrivate *>(d); - e->updateSizes(); - return (d->has_hfw || rowWrapPolicy() == WrapLongRows); -} - -/*! - \reimp -*/ -int QFormLayout::heightForWidth(int width) const -{ - Q_D(const QFormLayout); - if (!hasHeightForWidth()) - return -1; - - int leftMargin, topMargin, rightMargin, bottomMargin; - getContentsMargins(&leftMargin, &topMargin, &rightMargin, &bottomMargin); - - int targetWidth = width - leftMargin - rightMargin; - - if (!d->haveHfwCached(targetWidth)) { - QFormLayoutPrivate *dat = const_cast<QFormLayoutPrivate *>(d); - dat->setupVerticalLayoutData(targetWidth); - dat->setupHorizontalLayoutData(targetWidth); - dat->recalcHFW(targetWidth); - } - if (targetWidth == d->sh_width) - return d->hfw_sh_height + topMargin + bottomMargin; - else - return d->hfw_height + topMargin + bottomMargin; -} - -/*! - \reimp -*/ -void QFormLayout::setGeometry(const QRect &rect) -{ - Q_D(QFormLayout); - if (d->dirty || rect != geometry()) { - QRect cr = rect; - int leftMargin, topMargin, rightMargin, bottomMargin; - getContentsMargins(&leftMargin, &topMargin, &rightMargin, &bottomMargin); - cr.adjust(+leftMargin, +topMargin, -rightMargin, -bottomMargin); - - bool hfw = hasHeightForWidth(); - d->setupVerticalLayoutData(cr.width()); - d->setupHorizontalLayoutData(cr.width()); - if (hfw && (!d->haveHfwCached(cr.width()) || d->hfwLayouts.size() != d->vLayoutCount)) - d->recalcHFW(cr.width()); - if (hfw) { - qGeomCalc(d->hfwLayouts, 0, d->vLayoutCount, cr.y(), cr.height()); - d->arrangeWidgets(d->hfwLayouts, cr); - } else { - qGeomCalc(d->vLayouts, 0, d->vLayoutCount, cr.y(), cr.height()); - d->arrangeWidgets(d->vLayouts, cr); - } - QLayout::setGeometry(rect); - } -} - -/*! - \reimp -*/ -QSize QFormLayout::sizeHint() const -{ - Q_D(const QFormLayout); - if (!d->prefSize.isValid()) { - QFormLayoutPrivate *dat = const_cast<QFormLayoutPrivate *>(d); - dat->calcSizeHints(); - } - return d->prefSize; -} - -/*! - \reimp -*/ -QSize QFormLayout::minimumSize() const -{ - // ### fix minimumSize if hfw - Q_D(const QFormLayout); - if (!d->minSize.isValid()) { - QFormLayoutPrivate *dat = const_cast<QFormLayoutPrivate *>(d); - dat->calcSizeHints(); - } - return d->minSize; -} - -/*! - \reimp -*/ -void QFormLayout::invalidate() -{ - Q_D(QFormLayout); - d->dirty = true; - d->sizesDirty = true; - d->minSize = QSize(); - d->prefSize = QSize(); - d->formMaxWidth = -1; - d->hfw_width = -1; - d->sh_width = -1; - d->layoutWidth = -1; - d->hfw_sh_height = -1; - QLayout::invalidate(); -} - -/*! - Returns the number of rows in the form. - - \sa QLayout::count() -*/ -int QFormLayout::rowCount() const -{ - Q_D(const QFormLayout); - return d->m_matrix.rowCount(); -} - -/*! - Returns the layout item in the given \a row with the specified \a - role (column). Returns 0 if there is no such item. - - \sa QLayout::itemAt(), setItem() -*/ -QLayoutItem *QFormLayout::itemAt(int row, ItemRole role) const -{ - Q_D(const QFormLayout); - if (uint(row) >= uint(d->m_matrix.rowCount())) - return 0; - switch (role) { - case SpanningRole: - if (QFormLayoutItem *item = d->m_matrix(row, 1)) - if (item->fullRow) - return item->item; - break; - case LabelRole: - case FieldRole: - if (QFormLayoutItem *item = d->m_matrix(row, (role == LabelRole) ? 0 : 1)) - return item->item; - break; - } - return 0; -} - -/*! - Retrieves the row and role (column) of the item at the specified - \a index. If \a index is out of bounds, *\a rowPtr is set to -1; - otherwise the row is stored in *\a rowPtr and the role is stored - in *\a rolePtr. - - \sa itemAt(), count(), getLayoutPosition(), getWidgetPosition() -*/ -void QFormLayout::getItemPosition(int index, int *rowPtr, ItemRole *rolePtr) const -{ - Q_D(const QFormLayout); - int col = -1; - int row = -1; - - const int storageIndex = storageIndexFromLayoutItem(d->m_matrix, d->m_things.value(index)); - if (storageIndex != -1) - QFormLayoutPrivate::ItemMatrix::storageIndexToPosition(storageIndex, &row, &col); - - if (rowPtr) - *rowPtr = row; - if (rolePtr && col != -1) { - const bool spanning = col == 1 && d->m_matrix(row, col)->fullRow; - if (spanning) { - *rolePtr = SpanningRole; - } else { - *rolePtr = ItemRole(col); - } - } -} - -/*! - Retrieves the row and role (column) of the specified child \a - layout. If \a layout is not in the form layout, *\a rowPtr is set - to -1; otherwise the row is stored in *\a rowPtr and the role is stored - in *\a rolePtr. -*/ -void QFormLayout::getLayoutPosition(QLayout *layout, int *rowPtr, ItemRole *rolePtr) const -{ - int n = count(); - int index = 0; - while (index < n) { - if (itemAt(index) == layout) - break; - ++index; - } - getItemPosition(index, rowPtr, rolePtr); -} - -/*! - Retrieves the row and role (column) of the specified \a widget in - the layout. If \a widget is not in the layout, *\a rowPtr is set - to -1; otherwise the row is stored in *\a rowPtr and the role is stored - in *\a rolePtr. - - \sa getItemPosition(), itemAt() -*/ -void QFormLayout::getWidgetPosition(QWidget *widget, int *rowPtr, ItemRole *rolePtr) const -{ - getItemPosition(indexOf(widget), rowPtr, rolePtr); -} - -// ### eliminate labelForField() - -/*! - Returns the label associated with the given \a field. - - \sa itemAt() -*/ -QWidget *QFormLayout::labelForField(QWidget *field) const -{ - Q_D(const QFormLayout); - - int row; - ItemRole role; - - getWidgetPosition(field, &row, &role); - - if (row != -1 && role == FieldRole) { - if (QFormLayoutItem *label = d->m_matrix(row, LabelRole)) - return label->widget(); - } - return 0; -} - -/*! - \overload -*/ -QWidget *QFormLayout::labelForField(QLayout *field) const -{ - Q_D(const QFormLayout); - - int row; - ItemRole role; - - getLayoutPosition(field, &row, &role); - - if (row != -1 && role == FieldRole) { - if (QFormLayoutItem *label = d->m_matrix(row, LabelRole)) - return label->widget(); - } - return 0; -} - -/*! - \property QFormLayout::fieldGrowthPolicy - \brief the way in which the form's fields grow - - The default value depends on the widget or application style. For - QMacStyle, the default is FieldsStayAtSizeHint; for QCommonStyle - derived styles (like Plastique and Windows), the default - is ExpandingFieldsGrow; for Qt Extended styles, the default is - AllNonFixedFieldsGrow. - - If none of the fields can grow and the form is resized, extra - space is distributed according to the current - \l{formAlignment}{form alignment}. - - \sa formAlignment, rowWrapPolicy -*/ - -void QFormLayout::setFieldGrowthPolicy(FieldGrowthPolicy policy) -{ - Q_D(QFormLayout); - if (FieldGrowthPolicy(d->fieldGrowthPolicy) != policy) { - d->fieldGrowthPolicy = policy; - invalidate(); - } -} - -QFormLayout::FieldGrowthPolicy QFormLayout::fieldGrowthPolicy() const -{ - Q_D(const QFormLayout); - if (d->fieldGrowthPolicy == DefaultFieldGrowthPolicy) { - return QFormLayout::FieldGrowthPolicy(d->getStyle()->styleHint(QStyle::SH_FormLayoutFieldGrowthPolicy)); - } else { - return QFormLayout::FieldGrowthPolicy(d->fieldGrowthPolicy); - } -} - -/*! - \property QFormLayout::rowWrapPolicy - \brief the way in which the form's rows wrap - - The default value depends on the widget or application style. For - Qt Extended styles and QS60Style, the default is WrapLongRows; - for the other styles, the default is DontWrapRows. - - If you want to display each label above its associated field - (instead of next to it), set this property to WrapAllRows. - - \sa fieldGrowthPolicy -*/ - -void QFormLayout::setRowWrapPolicy(RowWrapPolicy policy) -{ - Q_D(QFormLayout); - if (RowWrapPolicy(d->rowWrapPolicy) != policy) { - d->rowWrapPolicy = policy; - invalidate(); - } -} - -QFormLayout::RowWrapPolicy QFormLayout::rowWrapPolicy() const -{ - Q_D(const QFormLayout); - if (d->rowWrapPolicy == DefaultRowWrapPolicy) { - return QFormLayout::RowWrapPolicy(d->getStyle()->styleHint(QStyle::SH_FormLayoutWrapPolicy)); - } else { - return QFormLayout::RowWrapPolicy(d->rowWrapPolicy); - } -} - -/*! - \property QFormLayout::labelAlignment - \brief the horizontal alignment of the labels - - The default value depends on the widget or application style. For - QCommonStyle derived styles, except for QPlastiqueStyle, the - default is Qt::AlignLeft; for the other styles, the default is - Qt::AlignRight. - - \sa formAlignment -*/ - -void QFormLayout::setLabelAlignment(Qt::Alignment alignment) -{ - Q_D(QFormLayout); - if (d->labelAlignment != alignment) { - d->labelAlignment = alignment; - invalidate(); - } -} - -Qt::Alignment QFormLayout::labelAlignment() const -{ - Q_D(const QFormLayout); - if (!d->labelAlignment) { - return Qt::Alignment(d->getStyle()->styleHint(QStyle::SH_FormLayoutLabelAlignment)); - } else { - return d->labelAlignment; - } -} - -/*! - \property QFormLayout::formAlignment - \brief the alignment of the form layout's contents within the layout's geometry - - The default value depends on the widget or application style. For - QMacStyle, the default is Qt::AlignHCenter | Qt::AlignTop; for the - other styles, the default is Qt::AlignLeft | Qt::AlignTop. - - \sa labelAlignment, rowWrapPolicy -*/ - -void QFormLayout::setFormAlignment(Qt::Alignment alignment) -{ - Q_D(QFormLayout); - if (d->formAlignment != alignment) { - d->formAlignment = alignment; - invalidate(); - } -} - -Qt::Alignment QFormLayout::formAlignment() const -{ - Q_D(const QFormLayout); - if (!d->formAlignment) { - return Qt::Alignment(d->getStyle()->styleHint(QStyle::SH_FormLayoutFormAlignment)); - } else { - return d->formAlignment; - } -} - -/*! - \property QFormLayout::horizontalSpacing - \brief the spacing between widgets that are laid out side by side - - By default, if no value is explicitly set, the layout's horizontal - spacing is inherited from the parent layout, or from the style settings - for the parent widget. - - \sa verticalSpacing, QStyle::pixelMetric(), {QStyle::}{PM_LayoutHorizontalSpacing} -*/ -void QFormLayout::setHorizontalSpacing(int spacing) -{ - Q_D(QFormLayout); - if (spacing != d->hSpacing) { - d->hSpacing = spacing; - invalidate(); - } -} - -int QFormLayout::horizontalSpacing() const -{ - Q_D(const QFormLayout); - if (d->hSpacing >= 0) { - return d->hSpacing; - } else { - return qSmartSpacing(this, QStyle::PM_LayoutHorizontalSpacing); - } -} - -/*! - \property QFormLayout::verticalSpacing - \brief the spacing between widgets that are laid out vertically - - By default, if no value is explicitly set, the layout's vertical spacing is - inherited from the parent layout, or from the style settings for the parent - widget. - - \sa horizontalSpacing, QStyle::pixelMetric(), {QStyle::}{PM_LayoutHorizontalSpacing} -*/ -void QFormLayout::setVerticalSpacing(int spacing) -{ - Q_D(QFormLayout); - if (spacing != d->vSpacing) { - d->vSpacing = spacing; - invalidate(); - } -} - -int QFormLayout::verticalSpacing() const -{ - Q_D(const QFormLayout); - if (d->vSpacing >= 0) { - return d->vSpacing; - } else { - return qSmartSpacing(this, QStyle::PM_LayoutVerticalSpacing); - } -} - -/*! - This function sets both the vertical and horizontal spacing to - \a spacing. - - \sa setVerticalSpacing(), setHorizontalSpacing() -*/ -void QFormLayout::setSpacing(int spacing) -{ - Q_D(QFormLayout); - d->vSpacing = d->hSpacing = spacing; - invalidate(); -} - -/*! - If the vertical spacing is equal to the horizontal spacing, - this function returns that value; otherwise it returns -1. - - \sa setSpacing(), verticalSpacing(), horizontalSpacing() -*/ -int QFormLayout::spacing() const -{ - int hSpacing = horizontalSpacing(); - if (hSpacing == verticalSpacing()) { - return hSpacing; - } else { - return -1; - } -} - -void QFormLayoutPrivate::arrangeWidgets(const QVector<QLayoutStruct>& layouts, QRect &rect) -{ - Q_Q(QFormLayout); - - int i; - const int rr = m_matrix.rowCount(); - QWidget *w = q->parentWidget(); - Qt::LayoutDirection layoutDirection = w ? w->layoutDirection() : QApplication::layoutDirection(); - - Qt::Alignment formAlignment = fixedAlignment(q->formAlignment(), layoutDirection); - int leftOffset = 0; - int delta = rect.width() - formMaxWidth; - if (formAlignment & (Qt::AlignHCenter | Qt::AlignRight) && delta > 0) { - leftOffset = delta; - if (formAlignment & Qt::AlignHCenter) - leftOffset >>= 1; - } - - for (i = 0; i < rr; ++i) { - QFormLayoutItem *label = m_matrix(i, 0); - QFormLayoutItem *field = m_matrix(i, 1); - - if (label) { - int height = layouts.at(label->vLayoutIndex).size; - if ((label->expandingDirections() & Qt::Vertical) == 0) { - /* - If the field on the right-hand side is tall, - we want the label to be top-aligned, but not too - much. So we introduce a 7 / 4 factor so that it - gets some extra pixels at the top. - */ - height = qMin(height, - qMin(label->sizeHint.height() * 7 / 4, - label->maxSize.height())); - } - - QSize sz(qMin(label->layoutWidth, label->sizeHint.width()), height); - int x = leftOffset + rect.x() + label->layoutPos; - if (fixedAlignment(q->labelAlignment(), layoutDirection) & Qt::AlignRight) - x += label->layoutWidth - sz.width(); - QPoint p(x, layouts.at(label->vLayoutIndex).pos); - // ### expansion & sizepolicy stuff - - label->setGeometry(QStyle::visualRect(layoutDirection, rect, QRect(p, sz))); - } - - if (field) { - QSize sz(field->layoutWidth, layouts.at(field->vLayoutIndex).size); - QPoint p(field->layoutPos + leftOffset + rect.x(), layouts.at(field->vLayoutIndex).pos); -/* - if ((field->widget() && field->widget()->sizePolicy().horizontalPolicy() & (QSizePolicy::GrowFlag | QSizePolicy::ExpandFlag | QSizePolicy::IgnoreFlag)) - || (field->layout() && sz.width() < field->maxSize.width())) { - sz.rwidth() = field->layoutWidth; - } -*/ - if (field->maxSize.isValid()) - sz = sz.boundedTo(field->maxSize); - - field->setGeometry(QStyle::visualRect(layoutDirection, rect, QRect(p, sz))); - } - } -} - -/*! - Sets the widget in the given \a row for the given \a role to \a widget, extending the - layout with empty rows if necessary. - - If the cell is already occupied, the \a widget is not inserted and an error message is - sent to the console. - - \bold{Note:} For most applications, addRow() or insertRow() should be used instead of setWidget(). - - \sa setLayout() -*/ -void QFormLayout::setWidget(int row, ItemRole role, QWidget *widget) -{ - Q_D(QFormLayout); - int rowCnt = rowCount(); - if (row >= rowCnt) - d->insertRows(rowCnt, row - rowCnt + 1); - d->setWidget(row, role, widget); -} - -/*! - Sets the sub-layout in the given \a row for the given \a role to \a layout, extending the - form layout with empty rows if necessary. - - If the cell is already occupied, the \a layout is not inserted and an error message is - sent to the console. - - \bold{Note:} For most applications, addRow() or insertRow() should be used instead of setLayout(). - - \sa setWidget() -*/ -void QFormLayout::setLayout(int row, ItemRole role, QLayout *layout) -{ - Q_D(QFormLayout); - int rowCnt = rowCount(); - if (row >= rowCnt) - d->insertRows(rowCnt, row - rowCnt + 1); - d->setLayout(row, role, layout); -} - -/*! - Sets the item in the given \a row for the given \a role to \a item, extending the - layout with empty rows if necessary. - - If the cell is already occupied, the \a item is not inserted and an error message is - sent to the console. - The \a item spans both columns. - - \warning Do not use this function to add child layouts or child - widget items. Use setLayout() or setWidget() instead. - - \sa setLayout() -*/ -void QFormLayout::setItem(int row, ItemRole role, QLayoutItem *item) -{ - Q_D(QFormLayout); - int rowCnt = rowCount(); - if (row >= rowCnt) - d->insertRows(rowCnt, row - rowCnt + 1); - d->setItem(row, role, item); -} - -/*! - \internal - */ - -void QFormLayout::resetFieldGrowthPolicy() -{ - Q_D(QFormLayout); - d->fieldGrowthPolicy = DefaultFieldGrowthPolicy; -} - -/*! - \internal - */ - -void QFormLayout::resetRowWrapPolicy() -{ - Q_D(QFormLayout); - d->rowWrapPolicy = DefaultRowWrapPolicy; -} - -/*! - \internal - */ - -void QFormLayout::resetFormAlignment() -{ - Q_D(QFormLayout); - d->formAlignment = 0; -} - -/*! - \internal - */ - -void QFormLayout::resetLabelAlignment() -{ - Q_D(QFormLayout); - d->labelAlignment = 0; -} - -#if 0 -void QFormLayout::dump() const -{ - Q_D(const QFormLayout); - for (int i = 0; i < rowCount(); ++i) { - for (int j = 0; j < 2; ++j) { - qDebug("m_matrix(%d, %d) = %p", i, j, d->m_matrix(i, j)); - } - } - for (int i = 0; i < d->m_things.count(); ++i) - qDebug("m_things[%d] = %p", i, d->m_things.at(i)); -} -#endif - -QT_END_NAMESPACE |