新增qwt源码版本

qwtdemo/examples/itemeditor/editor.h

@@ -0,0 +1,66 @@
+#ifndef _EDITOR_H_
+#define _EDITOR_H_
+
+#include <qobject.h>
+#include <qregion.h>
+#include <qpointer.h>
+#include <qwt_widget_overlay.h>
+
+class QwtPlot;
+class QwtPlotShapeItem;
+class QPainter;
+class QPoint;
+
+class Editor: public QObject
+{
+    Q_OBJECT
+
+public:
+    enum Mode
+    {
+        NoMask,
+        Mask,
+        AlphaMask,
+        AlphaMaskRedraw,
+        AlphaMaskCopyMask
+    };
+
+    Editor( QwtPlot * );
+    virtual ~Editor();
+
+    const QwtPlot *plot() const;
+    QwtPlot *plot();
+
+    virtual void setEnabled( bool on );
+    bool isEnabled() const;
+
+    void drawOverlay( QPainter * ) const;
+    QRegion maskHint() const;
+
+    virtual bool eventFilter( QObject *, QEvent *);
+
+    void setMode( Mode mode );
+    Mode mode() const;
+
+private:
+    bool pressed( const QPoint & );
+    bool moved( const QPoint & );
+    void released( const QPoint & );
+
+    QwtPlotShapeItem* itemAt( const QPoint& ) const;
+    void raiseItem( QwtPlotShapeItem * );
+
+    QRegion maskHint( QwtPlotShapeItem * ) const;
+    void setItemVisible( QwtPlotShapeItem *item, bool on );
+
+    bool d_isEnabled;
+    QPointer<QwtWidgetOverlay> d_overlay;
+
+    // Mouse positions
+    QPointF d_currentPos;
+    QwtPlotShapeItem* d_editedItem;
+
+    Mode d_mode;
+};
+
+#endif