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     2 **

     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

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     5 ** Contact: Nokia Corporation (qt-info@nokia.com)

     6 **

     7 ** This file is part of the Qt Designer of the Qt Toolkit.

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     9 ** $QT_BEGIN_LICENSE:LGPL$

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    16 ** GNU Lesser General Public License Usage

    17 ** Alternatively, this file may be used under the terms of the GNU Lesser

    18 ** General Public License version 2.1 as published by the Free Software

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    38 ** $QT_END_LICENSE$

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    40 ****************************************************************************/

    41 

    42 //

    43 //  W A R N I N G

    44 //  -------------

    45 //

    46 // This file is not part of the Qt API.  It exists for the convenience

    47 // of Qt Designer.  This header

    48 // file may change from version to version without notice, or even be removed.

    49 //

    50 // We mean it.

    51 //

    52 

    53 #ifndef LAYOUT_H

    54 #define LAYOUT_H

    55 

    56 #include "shared_global_p.h"

    57 #include "layoutinfo_p.h"

    58 

    59 #include <QtCore/QPointer>

    60 #include <QtCore/QObject>

    61 #include <QtCore/QMap>

    62 #include <QtCore/QHash>

    63 

    64 #include <QtGui/QLayout>

    65 #include <QtGui/QGridLayout>

    66 #include <QtGui/QWidget>

    67 

    68 QT_BEGIN_NAMESPACE

    69 

    70 class QDesignerFormWindowInterface;

    71 

    72 namespace qdesigner_internal {

    73 class QDESIGNER_SHARED_EXPORT Layout : public QObject

    74 {

    75     Q_OBJECT

    76     Q_DISABLE_COPY(Layout)

    77 protected:

    78     Layout(const QWidgetList &wl, QWidget *p, QDesignerFormWindowInterface *fw, QWidget *lb, LayoutInfo::Type layoutType);

    79 

    80 public:

    81     static  Layout* createLayout(const QWidgetList &widgets,  QWidget *parentWidget,

    82                                  QDesignerFormWindowInterface *fw,

    83                                  QWidget *layoutBase, LayoutInfo::Type layoutType);

    84 

    85     virtual ~Layout();

    86 

    87     virtual void sort() = 0;

    88     virtual void doLayout() = 0;

    89 

    90     virtual void setup();

    91     virtual void undoLayout();

    92     virtual void breakLayout();

    93 

    94     const QWidgetList &widgets() const { return m_widgets; }

    95     QWidget *parentWidget() const      { return m_parentWidget; }

    96     QWidget *layoutBaseWidget() const  { return m_layoutBase; }

    97 

    98     /* Determines whether instances of QLayoutWidget are unmanaged/hidden

    99      * after breaking a layout. Default is true. Can be turned off when

   100       * morphing */

   101     bool reparentLayoutWidget() const  { return m_reparentLayoutWidget; }

   102     void setReparentLayoutWidget(bool v) {  m_reparentLayoutWidget = v; }

   103 

   104 protected:

   105     virtual void finishLayout(bool needMove, QLayout *layout = 0);

   106     virtual bool prepareLayout(bool &needMove, bool &needReparent);

   107 

   108     void setWidgets(const  QWidgetList &widgets) { m_widgets = widgets; }

   109     QLayout *createLayout(int type);

   110     void reparentToLayoutBase(QWidget *w);

   111 

   112 private slots:

   113     void widgetDestroyed();

   114 

   115 private:

   116     QWidgetList m_widgets;

   117     QWidget *m_parentWidget;

   118     typedef QHash<QWidget *, QRect> WidgetGeometryHash;

   119     WidgetGeometryHash m_geometries;

   120     QWidget *m_layoutBase;

   121     QDesignerFormWindowInterface *m_formWindow;

   122     const LayoutInfo::Type m_layoutType;

   123     QPoint m_startPoint;

   124     QRect m_oldGeometry;

   125 

   126     bool m_reparentLayoutWidget;

   127     const bool m_isBreak;

   128 };

   129 

   130 namespace Utils

   131 {

   132 

   133 inline int indexOfWidget(QLayout *layout, QWidget *widget)

   134 {

   135     int index = 0;

   136     while (QLayoutItem *item = layout->itemAt(index)) {

   137         if (item->widget() == widget)

   138             return index;

   139 

   140         ++index;

   141     }

   142 

   143     return -1;

   144 }

   145 

   146 } // namespace Utils

   147 

   148 } // namespace qdesigner_internal

   149 

   150 QT_END_NAMESPACE

   151 

   152 #endif // LAYOUT_H