We created a simple utility class, MultiMouseListener, that permits mutliple mouse listeners to be added to the same ChartView.
The MultiMouseListener class allows multiple MouseListener objects to be attached and processed by the chart. It does that by keeping an internal list of all MouseListener objects added to it. The MultiMouseListener is itself a MouseListener and can be attached to a ChartView. Inside it forwards every mouse message that it recieves to all MouseListener objects in its list. It is up to the programmer to make sure that the mouse event being trapped do not interfer with one another. An example program that includes the complete c# source of the MultiMouseListener can be downloaded here ->
http://quinn-curtis.com/examplecode/MultiMouseListenerDemo.zip
In use it works like:
DataToolTip datatooltip = new DataToolTip(chartVu);
datatooltip.SetDataToolTipFormat(ChartObj.DATA_TOOLTIP_XY_ONELINE);
datatooltip.SetButtonMask(MouseButtons.Left);
datatooltip.SetEnable(true);
ChartZoom zoomObj = new ChartZoom(chartVu, pTransform1, true);
zoomObj.SetButtonMask(MouseButtons.Right);
zoomObj.SetEnable(true);
MultiMouseListener multimouselistener = new MultiMouseListener(datatooltip);
multimouselistener.AddMouseListener(zoomObj);
chartVu.SetCurrentMouseListener(multimouselistener);
It does not handle the case of combined keyboard mouse input, since the mouse listeners do not process the keypresses in any way.
Are multiple mouse listeners possible ?
Posted - 09 Jun 2004 : 00:08:43
