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    41 

    42 #ifndef QWIDGETRESIZEHANDLER_P_H

    43 #define QWIDGETRESIZEHANDLER_P_H

    44 

    45 //

    46 //  W A R N I N G

    47 //  -------------

    48 //

    49 // This file is not part of the Qt API.  This header file may

    50 // change from version to version without notice, or even be

    51 // removed.

    52 //

    53 // We mean it.

    54 //

    55 

    56 #include "QtCore/qobject.h"

    57 #include "QtCore/qpoint.h"

    58 

    59 #ifndef QT_NO_RESIZEHANDLER

    60 

    61 QT_BEGIN_NAMESPACE

    62 

    63 class QMouseEvent;

    64 class QKeyEvent;

    65 

    66 class Q_GUI_EXPORT QWidgetResizeHandler : public QObject

    67 {

    68     Q_OBJECT

    69 

    70 public:

    71     enum Action {

    72         Move        = 0x01,

    73         Resize        = 0x02,

    74         Any        = Move|Resize

    75     };

    76 

    77     explicit QWidgetResizeHandler(QWidget *parent, QWidget *cw = 0);

    78     void setActive(bool b) { setActive(Any, b); }

    79     void setActive(Action ac, bool b);

    80     bool isActive() const { return isActive(Any); }

    81     bool isActive(Action ac) const;

    82     void setMovingEnabled(bool b) { movingEnabled = b; }

    83     bool isMovingEnabled() const { return movingEnabled; }

    84 

    85     bool isButtonDown() const { return buttonDown; }

    86 

    87     void setExtraHeight(int h) { extrahei = h; }

    88     void setSizeProtection(bool b) { sizeprotect = b; }

    89 

    90     void setFrameWidth(int w) { fw = w; }

    91 

    92     void doResize();

    93     void doMove();

    94 

    95 Q_SIGNALS:

    96     void activate();

    97 

    98 protected:

    99     bool eventFilter(QObject *o, QEvent *e);

   100     void mouseMoveEvent(QMouseEvent *e);

   101     void keyPressEvent(QKeyEvent *e);

   102 

   103 private:

   104     Q_DISABLE_COPY(QWidgetResizeHandler)

   105 

   106     enum MousePosition {

   107         Nowhere,

   108         TopLeft, BottomRight, BottomLeft, TopRight,

   109         Top, Bottom, Left, Right,

   110         Center

   111     };

   112 

   113     QWidget *widget;

   114     QWidget *childWidget;

   115     QPoint moveOffset;

   116     QPoint invertedMoveOffset;

   117     MousePosition mode;

   118     int fw;

   119     int extrahei;

   120     int range;

   121     uint buttonDown            :1;

   122     uint moveResizeMode            :1;

   123     uint activeForResize    :1;

   124     uint sizeprotect            :1;

   125     uint movingEnabled                    :1;

   126     uint activeForMove            :1;

   127 

   128     void setMouseCursor(MousePosition m);

   129     bool isMove() const {

   130         return moveResizeMode && mode == Center;

   131     }

   132     bool isResize() const {

   133         return moveResizeMode && !isMove();

   134     }

   135 };

   136 

   137 QT_END_NAMESPACE

   138 

   139 #endif // QT_NO_RESIZEHANDLER

   140 

   141 #endif // QWIDGETRESIZEHANDLER_P_H