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Subject: Re: why does this paint twice?
From: Greg Brown <gk_brown@verizon.net>
In-reply-to: 
 <2F5A71AA2EE83044AB46CB16CC1549F8017C1E36@FMSMSX108.amr.corp.intel.com>
Date: Thu, 07 Mar 2013 12:22:26 -0500
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References: 
 <2F5A71AA2EE83044AB46CB16CC1549F8017C1E36@FMSMSX108.amr.corp.intel.com>
To: user@pivot.apache.org

paint() is called any time any region of the screen needs to be updated. =
This update could be triggered by the application or it could be =
triggered by the OS (for example, if an overlapping window is moved).=20

The graphics context passed to paint() will be clipped to the bounds of =
the update region, but you should generally optimize your component's =
drawing code so it only draws that part that needs to be repainted.

On Mar 7, 2013, at 12:08 PM, "Schwartz, Cynthia L" =
<cynthia.l.schwartz@intel.com> wrote:

> I am writing a custom control and want to understand why this is =
painting twice. Complete code below.
> =20
> Thanks,
> Cynthia
> =20
> public class PaintTest extends Application.Adapter {
>     private Window window =3D null;
>     private Waveform waveform =3D null;
> =20
>     @Override
>     public void startup(Display display, Map<String, String> =
properties) {
>         window =3D new Window();
>                 waveform =3D new Waveform();
>                 window.setContent(waveform);
>         window.setMaximized(true);
>         window.open(display);
>     }
> =20
>     @Override
>     public boolean shutdown(boolean optional) {
>         if (window !=3D null) {
>             window.close();
>         }
> =20
>         return false;
>     }
> =20
>     public static void main(String[] args) {
>         DesktopApplicationContext.main(PaintTest.class, args);
>     }
> =20
> }
> =20
> package painttest;
> =20
> import java.awt.Graphics2D;
> import org.apache.pivot.wtk.Panel;
> =20
> public class Waveform extends Panel
> {
>        @Override
>         public void paint(Graphics2D graphics)
>     {
>                 System.out.println("Painting");
> }
> }
> =20
> =20