--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/designer/src/lib/shared/layoutinfo.cpp Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,312 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 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 "layoutinfo_p.h"
+
+#include <QtDesigner/QDesignerFormEditorInterface>
+#include <QtDesigner/QDesignerContainerExtension>
+#include <QtDesigner/QDesignerMetaDataBaseInterface>
+#include <QtDesigner/QExtensionManager>
+
+#include <QtGui/QHBoxLayout>
+#include <QtGui/QFormLayout>
+#include <QtGui/QSplitter>
+#include <QtCore/QDebug>
+#include <QtCore/QHash>
+#include <QtCore/QRect>
+
+QT_BEGIN_NAMESPACE
+
+namespace qdesigner_internal {
+/*!
+ \overload
+*/
+LayoutInfo::Type LayoutInfo::layoutType(const QDesignerFormEditorInterface *core, const QLayout *layout)
+{
+ Q_UNUSED(core)
+ if (!layout)
+ return NoLayout;
+ else if (qobject_cast<const QHBoxLayout*>(layout))
+ return HBox;
+ else if (qobject_cast<const QVBoxLayout*>(layout))
+ return VBox;
+ else if (qobject_cast<const QGridLayout*>(layout))
+ return Grid;
+ else if (qobject_cast<const QFormLayout*>(layout))
+ return Form;
+ return UnknownLayout;
+}
+
+static const QHash<QString, LayoutInfo::Type> &layoutNameTypeMap()
+{
+ static QHash<QString, LayoutInfo::Type> nameTypeMap;
+ if (nameTypeMap.empty()) {
+ nameTypeMap.insert(QLatin1String("QVBoxLayout"), LayoutInfo::VBox);
+ nameTypeMap.insert(QLatin1String("QHBoxLayout"), LayoutInfo::HBox);
+ nameTypeMap.insert(QLatin1String("QGridLayout"), LayoutInfo::Grid);
+ nameTypeMap.insert(QLatin1String("QFormLayout"), 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 = 0;
+ 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 0;
+}
+
+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 != 0);
+
+ QLayout *layout = managedLayout(core, widget);
+
+ if (layout == 0 || core->metaDataBase()->item(layout) != 0) {
+ 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 = 0;
+
+ 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 QList<QLayout*> childLayouts = qFindChildren<QLayout*>(parentLayout);
+ if (childLayouts.empty())
+ return NoLayout;
+ const QList<QLayout*>::const_iterator lcend = childLayouts.constEnd();
+ for (QList<QLayout*>::const_iterator it = childLayouts.constBegin(); it != lcend; ++it) {
+ QLayout *layout = *it;
+ 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)
+{
+ QLayout *widgetLayout = widget->layout();
+ if (widgetLayout && widget->inherits("Q3GroupBox")) {
+ if (widgetLayout->count()) {
+ widgetLayout = widgetLayout->itemAt(0)->layout();
+ } else {
+ widgetLayout = 0;
+ }
+ }
+ return widgetLayout;
+}
+
+
+QLayout *LayoutInfo::managedLayout(const QDesignerFormEditorInterface *core, const QWidget *widget)
+{
+ if (widget == 0)
+ return 0;
+
+ QLayout *layout = widget->layout();
+ if (!layout)
+ return 0;
+
+ return managedLayout(core, layout);
+}
+
+QLayout *LayoutInfo::managedLayout(const QDesignerFormEditorInterface *core, QLayout *layout)
+{
+ 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 == 0) {
+ layout = qFindChild<QLayout*>(layout);
+ item = metaDataBase->item(layout);
+ }
+ if (!item)
+ return 0;
+ return layout;
+}
+
+// Is it a a dummy grid placeholder created by Designer?
+bool LayoutInfo::isEmptyItem(QLayoutItem *item)
+{
+ if (item == 0) {
+ qDebug() << "** WARNING Zero-item passed on to isEmptyItem(). This indicates a layout inconsistency.";
+ return true;
+ }
+ return item->spacerItem() != 0;
+}
+
+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 = 0, *field = 0;
+ 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