新增qwt源码版本

qwtdemo/examples/stockchart/legend.h

@@ -0,0 +1,42 @@
+#ifndef _LEGEND_H_
+#define _LEGEND_H_
+
+#include <qwt_abstract_legend.h>
+
+class LegendTreeView;
+class QStandardItem;
+class QModelIndex;
+class QwtPlotItem;
+
+class Legend : public QwtAbstractLegend
+{
+    Q_OBJECT
+
+public:
+    explicit Legend( QWidget *parent = NULL );
+    virtual ~Legend();
+
+    virtual void renderLegend( QPainter *,
+        const QRectF &, bool fillBackground ) const;
+
+    virtual bool isEmpty() const;
+
+    virtual int scrollExtent( Qt::Orientation ) const;
+
+Q_SIGNALS:
+    void checked( QwtPlotItem *plotItem, bool on, int index );
+
+public Q_SLOTS:
+    virtual void updateLegend( const QVariant &,
+        const QList<QwtLegendData> & );
+
+private Q_SLOTS:
+    void handleClick( const QModelIndex & );
+
+private:
+    void updateItem( QStandardItem *, const QwtLegendData & );
+
+    LegendTreeView *d_treeView;
+};
+
+#endif