An SWT Canvas can be used to provide custom rendering for a view. As a starting point for drawing a clock, the Canvas will use drawArc to create a circle.
Remove the content of the
ClockView, leaving behind an empty implementation of thesetFocusandcreatePartControlmethods.Run the target Eclipse instance and you will see that the
ClockViewis now empty.Create a new method called
drawClockthat takes aPaintEvent, and use the graphics contextgcfrom the event to draw the circle.In the
createPartControlmethod, do the following:Create a
new Canvas, which is a drawable widget.Add a
PaintListenerto theCanvasthat uses a method reference to thedrawClockmethod.
The code will look like this:
package com.packtpub.e4.clock.ui.views; import org.eclipse.swt.*; import org.eclipse.swt.events.*; import org.eclipse.swt.widgets.*; import org.eclipse.ui.part.ViewPart; public class ClockView extends ViewPart { public void createPartControl(Composite parent) ...