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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the Qt Designer of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists for the convenience
// of Qt Designer. This header
// file may change from version to version without notice, or even be removed.
//
// We mean it.
//
#ifndef QLAYOUT_WIDGET_H
#define QLAYOUT_WIDGET_H
#include "shared_global_p.h"
#include <QtDesigner/QDesignerLayoutDecorationExtension>
#include <QtCore/QPointer>
#include <QtCore/QVariant>
#include <QtGui/QWidget>
#include <QtGui/QLayout>
QT_BEGIN_NAMESPACE
class QDesignerFormWindowInterface;
class QDesignerFormEditorInterface;
class QGridLayout;
class QFormLayout;
namespace qdesigner_internal {
// ---- LayoutProperties: Helper struct that stores all layout-relevant properties
// with functions to retrieve and apply to property sheets. Can be used to store the state
// for undo commands and while rebuilding layouts.
struct QDESIGNER_SHARED_EXPORT LayoutProperties
{
LayoutProperties();
void clear();
enum Margins { LeftMargin, TopMargin, RightMargin, BottomMargin, MarginCount };
enum Spacings { Spacing, HorizSpacing, VertSpacing, SpacingsCount };
enum PropertyMask {
ObjectNameProperty = 0x1,
LeftMarginProperty = 0x2, TopMarginProperty = 0x4, RightMarginProperty = 0x8, BottomMarginProperty = 0x10,
SpacingProperty = 0x20, HorizSpacingProperty = 0x40, VertSpacingProperty = 0x80,
SizeConstraintProperty = 0x100,
FieldGrowthPolicyProperty = 0x200, RowWrapPolicyProperty = 0x400, LabelAlignmentProperty = 0x0800, FormAlignmentProperty = 0x1000,
BoxStretchProperty = 0x2000, GridRowStretchProperty = 0x4000, GridColumnStretchProperty = 0x8000,
GridRowMinimumHeightProperty = 0x10000, GridColumnMinimumWidthProperty = 0x20000,
AllProperties = 0xFFFF};
// return a PropertyMask of visible properties
static int visibleProperties(const QLayout *layout);
// Retrieve from /apply to sheet: A property mask is returned indicating the properties found in the sheet
int fromPropertySheet(const QDesignerFormEditorInterface *core, QLayout *l, int mask = AllProperties);
int toPropertySheet(const QDesignerFormEditorInterface *core, QLayout *l, int mask = AllProperties, bool applyChanged = true) const;
int m_margins[MarginCount];
bool m_marginsChanged[MarginCount];
int m_spacings[SpacingsCount];
bool m_spacingsChanged[SpacingsCount];
QVariant m_objectName; // receives a PropertySheetStringValue
bool m_objectNameChanged;
QVariant m_sizeConstraint;
bool m_sizeConstraintChanged;
bool m_fieldGrowthPolicyChanged;
QVariant m_fieldGrowthPolicy;
bool m_rowWrapPolicyChanged;
QVariant m_rowWrapPolicy;
bool m_labelAlignmentChanged;
QVariant m_labelAlignment;
bool m_formAlignmentChanged;
QVariant m_formAlignment;
bool m_boxStretchChanged;
QVariant m_boxStretch;
bool m_gridRowStretchChanged;
QVariant m_gridRowStretch;
bool m_gridColumnStretchChanged;
QVariant m_gridColumnStretch;
bool m_gridRowMinimumHeightChanged;
QVariant m_gridRowMinimumHeight;
bool m_gridColumnMinimumWidthChanged;
QVariant m_gridColumnMinimumWidth;
};
// -- LayoutHelper: For use with the 'insert widget'/'delete widget' command,
// able to store and restore states.
// This could become part of 'QDesignerLayoutDecorationExtensionV2',
// but to keep any existing old extensions working, it is provided as
// separate class with a factory function.
class LayoutHelper {
protected:
LayoutHelper();
public:
virtual ~LayoutHelper();
static LayoutHelper *createLayoutHelper(int type);
static int indexOf(const QLayout *lt, const QWidget *widget);
// Return area of an item (x == columns)
QRect itemInfo(QLayout *lt, const QWidget *widget) const;
virtual QRect itemInfo(QLayout *lt, int index) const = 0;
virtual void insertWidget(QLayout *lt, const QRect &info, QWidget *w) = 0;
virtual void removeWidget(QLayout *lt, QWidget *widget) = 0;
// Since 4.5: The 'morphing' feature requires an API for replacing widgets on layouts.
virtual void replaceWidget(QLayout *lt, QWidget *before, QWidget *after) = 0;
// Simplify a grid, remove empty columns, rows within the rectangle
// The DeleteWidget command restricts the area to be simplified.
virtual bool canSimplify(const QDesignerFormEditorInterface *core, const QWidget *widgetWithManagedLayout, const QRect &restrictionArea) const = 0;
virtual void simplify(const QDesignerFormEditorInterface *core, QWidget *widgetWithManagedLayout, const QRect &restrictionArea) = 0;
// Push and pop a state. Can be used for implementing undo for
// simplify/row, column insertion commands, provided that
// the widgets remain the same.
virtual void pushState(const QDesignerFormEditorInterface *core, const QWidget *widgetWithManagedLayout) = 0;
virtual void popState(const QDesignerFormEditorInterface *core, QWidget *widgetWithManagedLayout) = 0;
};
// Base class for layout decoration extensions.
class QDESIGNER_SHARED_EXPORT QLayoutSupport: public QObject, public QDesignerLayoutDecorationExtension
{
Q_OBJECT
Q_INTERFACES(QDesignerLayoutDecorationExtension)
protected:
QLayoutSupport(QDesignerFormWindowInterface *formWindow, QWidget *widget, LayoutHelper *helper, QObject *parent = 0);
public:
virtual ~QLayoutSupport();
inline QDesignerFormWindowInterface *formWindow() const { return m_formWindow; }
// DecorationExtension V2
LayoutHelper* helper() const { return m_helper; }
// DecorationExtension
virtual int currentIndex() const { return m_currentIndex; }
virtual InsertMode currentInsertMode() const { return m_currentInsertMode; }
virtual QPair<int, int> currentCell() const { return m_currentCell; }
virtual int findItemAt(const QPoint &pos) const;
virtual int indexOf(QWidget *widget) const;
virtual int indexOf(QLayoutItem *item) const;
virtual void adjustIndicator(const QPoint &pos, int index);
virtual QList<QWidget*> widgets(QLayout *layout) const;
// Pad empty cells with dummy spacers. Called by layouting commands.
static void createEmptyCells(QGridLayout *gridLayout);
// remove dummy spacers in the area. Returns false if there are non-empty items in the way
static bool removeEmptyCells(QGridLayout *gridLayout, const QRect &area);
static void createEmptyCells(QFormLayout *formLayout); // ditto.
static bool removeEmptyCells(QFormLayout *formLayout, const QRect &area);
// grid helpers: find item index
static int findItemAt(QGridLayout *, int row, int column);
// grid helpers: Quick check whether simplify should be enabled for grids. May return false positives.
static bool canSimplifyQuickCheck(const QGridLayout *);
static bool canSimplifyQuickCheck(const QFormLayout *fl);
// Factory function, create layout support according to layout type of widget
static QLayoutSupport *createLayoutSupport(QDesignerFormWindowInterface *formWindow, QWidget *widget, QObject *parent = 0);
protected:
// figure out insertion position and mode from indicator on empty cell if supported
virtual void setCurrentCellFromIndicatorOnEmptyCell(int index) = 0;
// figure out insertion position and mode from indicator
virtual void setCurrentCellFromIndicator(Qt::Orientation indicatorOrientation, int index, int increment) = 0;
// Overwrite to return the extended geometry of an item, that is,
// if it is a border item, include the widget border for the indicator to work correctly
virtual QRect extendedGeometry(int index) const = 0;
virtual bool supportsIndicatorOrientation(Qt::Orientation indicatorOrientation) const = 0;
QRect itemInfo(int index) const;
QLayout *layout() const;
QGridLayout *gridLayout() const;
QWidget *widget() const { return m_widget; }
void setInsertMode(InsertMode im);
void setCurrentCell(const QPair<int, int> &cell);
private:
enum Indicator { LeftIndicator, TopIndicator, RightIndicator, BottomIndicator, NumIndicators };
void hideIndicator(Indicator i);
void showIndicator(Indicator i, const QRect &geometry, const QPalette &);
QDesignerFormWindowInterface *m_formWindow;
LayoutHelper* m_helper;
QPointer<QWidget> m_widget;
QPointer<QWidget> m_indicators[NumIndicators];
int m_currentIndex;
InsertMode m_currentInsertMode;
QPair<int, int> m_currentCell;
};
} // namespace qdesigner_internal
// Red layout widget.
class QDESIGNER_SHARED_EXPORT QLayoutWidget: public QWidget
{
Q_OBJECT
public:
explicit QLayoutWidget(QDesignerFormWindowInterface *formWindow, QWidget *parent = 0);
int layoutLeftMargin() const;
void setLayoutLeftMargin(int layoutMargin);
int layoutTopMargin() const;
void setLayoutTopMargin(int layoutMargin);
int layoutRightMargin() const;
void setLayoutRightMargin(int layoutMargin);
int layoutBottomMargin() const;
void setLayoutBottomMargin(int layoutMargin);
inline QDesignerFormWindowInterface *formWindow() const { return m_formWindow; }
protected:
virtual bool event(QEvent *e);
virtual void paintEvent(QPaintEvent *e);
private:
QDesignerFormWindowInterface *m_formWindow;
int m_leftMargin;
int m_topMargin;
int m_rightMargin;
int m_bottomMargin;
};
QT_END_NAMESPACE
#endif // QDESIGNER_WIDGET_H
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