Performance problem with Custom Controls

[m.peter]

Hi,

I have a little performance problem with custom controls.
The custom control I use is a JTextField containing a JButton.

When I create a Window or Panel with 4 instances of this custom control, it needs more than 30 seconds to render the design view.

Is there a chance to render a dummy element instead of the real custom control ? ( An empty box for example )
I think that can increase the design mode performance.

Thanks for Your help,

Matthias

[Eric Clayberg]

When I create a Window or Panel with 4 instances of this custom control, it needs more than 30 seconds to render the design view.

Does this happen every time you close and re-open that window, or just the first time during an Eclipse session? Is the time dependent on the number of custom widget instances? I ask because the first time I open any window with a custom control, it does take a bit of extra time. After that, the same window or any other window opens up very quickly. If you are seeing a one-time effect, it may simply be the Designer plugin itself loading (or in the case of any custom widgets, initializing the Eclipse classloader and loading the custom class itself).

[m.peter]

It happens every time I change the window code.
Adding a new instance of the custom widget to the window ( in design view ) needs a long time, too.

The time to show the window depends on the number of custom widget instances.

I tried to simplify the custom widget ( there is an image on the button. i removed it. ) but it doesn't help.

[Eric Clayberg]

It happens every time I change the window code.
Adding a new instance of the custom widget to the window ( in design view ) needs a long time, too. The time to show the window depends on the number of custom widget instances. I tried to simplify the custom widget ( there is an image on the button. i removed it. ) but it doesn't help.

Would it be possible for you to send us a test case?

I can't reproduce this behavior with the test case that I have on my end.

[m.peter]

Hello,

I tried to create a test case. My Problem doesn't exists there.
I think the problem comes from the combination of my container widget
( a subclass of JPanel ) and the custom controls. All of them have initialization
code in their constructors. I'll try to find the core of the problem. If I find it i will post again.

Thanks for your help,

Matthias Peter