comparison widgets/Panner.h @ 256:c492902dba40

* Make shift+mousewheel scroll vertically (where applicable) and alt+mousewheel
  zoom vertically (where applicable).  Closes #1734844

 
     void setDefaultRectCentre(float, float);
 
     void setThumbColour(QColor colour);
     void setAlpha(int backgroundAlpha, int thumbAlpha);
+
+    /**
+     * Set the amount the scroll() function or mouse wheel movement
+     * makes the panner rectangle move by.  The default value of 0
+     * means to select a value automatically based on the dimensions
+     * of the panner rectangle.
+     */
+    void setScrollUnit(float unit);
 
     void getRectExtents(float &x0, float &y0, float &width, float &height);
 
     virtual QSize sizeHint() const;
 

      * axis, as a proportion (0 -> 1) of the height of the whole panner
      * widget.
      */
     void setRectCentreY(float y);
 
+    /**
+     * Move up (if up is true) or down a bit.  This is basically the
+     * same action as rolling the mouse wheel one notch.
+     */
+    void scroll(bool up);
+
     void resetToDefault();
 
 protected:
     virtual void mousePressEvent(QMouseEvent *e);
     virtual void mouseDoubleClickEvent(QMouseEvent *e);

 
     float m_rectX;
     float m_rectY;
     float m_rectWidth;
     float m_rectHeight;
+    float m_scrollUnit;
 
     float m_defaultCentreX;
     float m_defaultCentreY;
     bool m_defaultsSet;