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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#include "layoutinfo_p.h"
#include <QtDesigner/abstractformeditor.h>
#include <QtDesigner/container.h>
#include <QtDesigner/abstractmetadatabase.h>
#include <QtDesigner/qextensionmanager.h>
#include <QtWidgets/qboxlayout.h>
#include <QtWidgets/qformlayout.h>
#include <QtWidgets/qsplitter.h>
#include <QtCore/qdebug.h>
#include <QtCore/qhash.h>
#include <QtCore/qrect.h>
QT_BEGIN_NAMESPACE
using namespace Qt::StringLiterals;
namespace qdesigner_internal {
/*!
\overload
*/
LayoutInfo::Type LayoutInfo::layoutType(const QDesignerFormEditorInterface *core, const QLayout *layout)
{
Q_UNUSED(core);
if (!layout)
return NoLayout;
if (qobject_cast<const QHBoxLayout*>(layout))
return HBox;
if (qobject_cast<const QVBoxLayout*>(layout))
return VBox;
if (qobject_cast<const QGridLayout*>(layout))
return Grid;
if (qobject_cast<const QFormLayout*>(layout))
return Form;
return UnknownLayout;
}
static const QHash<QString, LayoutInfo::Type> &layoutNameTypeMap()
{
static const QHash<QString, LayoutInfo::Type> nameTypeMap = {
{u"QVBoxLayout"_s, LayoutInfo::VBox},
{u"QHBoxLayout"_s, LayoutInfo::HBox},
{u"QGridLayout"_s, LayoutInfo::Grid},
{u"QFormLayout"_s, LayoutInfo::Form}
};
return nameTypeMap;
}
LayoutInfo::Type LayoutInfo::layoutType(const QString &typeName)
{
return layoutNameTypeMap().value(typeName, NoLayout);
}
QString LayoutInfo::layoutName(Type t)
{
return layoutNameTypeMap().key(t);
}
/*!
\overload
*/
LayoutInfo::Type LayoutInfo::layoutType(const QDesignerFormEditorInterface *core, const QWidget *w)
{
if (const QSplitter *splitter = qobject_cast<const QSplitter *>(w))
return splitter->orientation() == Qt::Horizontal ? HSplitter : VSplitter;
return layoutType(core, w->layout());
}
LayoutInfo::Type LayoutInfo::managedLayoutType(const QDesignerFormEditorInterface *core,
const QWidget *w,
QLayout **ptrToLayout)
{
if (ptrToLayout)
*ptrToLayout = nullptr;
if (const QSplitter *splitter = qobject_cast<const QSplitter *>(w))
return splitter->orientation() == Qt::Horizontal ? HSplitter : VSplitter;
QLayout *layout = managedLayout(core, w);
if (!layout)
return NoLayout;
if (ptrToLayout)
*ptrToLayout = layout;
return layoutType(core, layout);
}
QWidget *LayoutInfo::layoutParent(const QDesignerFormEditorInterface *core, QLayout *layout)
{
Q_UNUSED(core);
QObject *o = layout;
while (o) {
if (QWidget *widget = qobject_cast<QWidget*>(o))
return widget;
o = o->parent();
}
return nullptr;
}
void LayoutInfo::deleteLayout(const QDesignerFormEditorInterface *core, QWidget *widget)
{
if (QDesignerContainerExtension *container = qt_extension<QDesignerContainerExtension*>(core->extensionManager(), widget))
widget = container->widget(container->currentIndex());
Q_ASSERT(widget != nullptr);
QLayout *layout = managedLayout(core, widget);
if (layout == nullptr || core->metaDataBase()->item(layout) != nullptr) {
delete layout;
widget->updateGeometry();
return;
}
qDebug() << "trying to delete an unmanaged layout:" << "widget:" << widget << "layout:" << layout;
}
LayoutInfo::Type LayoutInfo::laidoutWidgetType(const QDesignerFormEditorInterface *core,
QWidget *widget,
bool *isManaged,
QLayout **ptrToLayout)
{
if (isManaged)
*isManaged = false;
if (ptrToLayout)
*ptrToLayout = nullptr;
QWidget *parent = widget->parentWidget();
if (!parent)
return NoLayout;
// 1) Splitter
if (QSplitter *splitter = qobject_cast<QSplitter*>(parent)) {
if (isManaged)
*isManaged = core->metaDataBase()->item(splitter);
return splitter->orientation() == Qt::Horizontal ? HSplitter : VSplitter;
}
// 2) Layout of parent
QLayout *parentLayout = parent->layout();
if (!parentLayout)
return NoLayout;
if (parentLayout->indexOf(widget) != -1) {
if (isManaged)
*isManaged = core->metaDataBase()->item(parentLayout);
if (ptrToLayout)
*ptrToLayout = parentLayout;
return layoutType(core, parentLayout);
}
// 3) Some child layout (see below comment about Q3GroupBox)
const auto childLayouts = parentLayout->findChildren<QLayout*>();
if (childLayouts.isEmpty())
return NoLayout;
for (QLayout *layout : childLayouts) {
if (layout->indexOf(widget) != -1) {
if (isManaged)
*isManaged = core->metaDataBase()->item(layout);
if (ptrToLayout)
*ptrToLayout = layout;
return layoutType(core, layout);
}
}
return NoLayout;
}
QLayout *LayoutInfo::internalLayout(const QWidget *widget)
{
return widget->layout();
}
QLayout *LayoutInfo::managedLayout(const QDesignerFormEditorInterface *core, const QWidget *widget)
{
if (widget == nullptr)
return nullptr;
QLayout *layout = widget->layout();
if (!layout)
return nullptr;
return managedLayout(core, layout);
}
QLayout *LayoutInfo::managedLayout(const QDesignerFormEditorInterface *core, QLayout *layout)
{
if (!layout)
return nullptr;
QDesignerMetaDataBaseInterface *metaDataBase = core->metaDataBase();
if (!metaDataBase)
return layout;
/* This code exists mainly for the Q3GroupBox class, for which
* widget->layout() returns an internal VBoxLayout. */
const QDesignerMetaDataBaseItemInterface *item = metaDataBase->item(layout);
if (item == nullptr) {
layout = layout->findChild<QLayout*>();
item = metaDataBase->item(layout);
}
if (!item)
return nullptr;
return layout;
}
// Is it a a dummy grid placeholder created by Designer?
bool LayoutInfo::isEmptyItem(QLayoutItem *item)
{
if (item == nullptr) {
qDebug() << "** WARNING Zero-item passed on to isEmptyItem(). This indicates a layout inconsistency.";
return true;
}
return item->spacerItem() != nullptr;
}
QDESIGNER_SHARED_EXPORT void getFormLayoutItemPosition(const QFormLayout *formLayout, int index, int *rowPtr, int *columnPtr, int *rowspanPtr, int *colspanPtr)
{
int row;
QFormLayout::ItemRole role;
formLayout->getItemPosition(index, &row, &role);
const int columnspan = role == QFormLayout::SpanningRole ? 2 : 1;
const int column = (columnspan > 1 || role == QFormLayout::LabelRole) ? 0 : 1;
if (rowPtr)
*rowPtr = row;
if (columnPtr)
*columnPtr = column;
if (rowspanPtr)
*rowspanPtr = 1;
if (colspanPtr)
*colspanPtr = columnspan;
}
static inline QFormLayout::ItemRole formLayoutRole(int column, int colspan)
{
if (colspan > 1)
return QFormLayout::SpanningRole;
return column == 0 ? QFormLayout::LabelRole : QFormLayout::FieldRole;
}
QDESIGNER_SHARED_EXPORT void formLayoutAddWidget(QFormLayout *formLayout, QWidget *w, const QRect &r, bool insert)
{
// Consistent API galore...
if (insert) {
const bool spanning = r.width() > 1;
if (spanning) {
formLayout->insertRow(r.y(), w);
} else {
QWidget *label = nullptr;
QWidget *field = nullptr;
if (r.x() == 0) {
label = w;
} else {
field = w;
}
formLayout->insertRow(r.y(), label, field);
}
} else {
formLayout->setWidget(r.y(), formLayoutRole(r.x(), r.width()), w);
}
}
} // namespace qdesigner_internal
QT_END_NAMESPACE
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