How do you prevent updateLayout during screen change.

I don't know if I thought that, but I think I read somewhere once that it is possible to 'lock' the layout as you work in it.

For example, I now call you deleteAll() in a Manager custom that I created, just to add a few new custom fields and add even some abandoned fields.

The problem is that when I call deleteAll() for this, a call to sublayout and custom fields are not there and then he complained abuot that. * Bleep *, I know that they are not there and I don't want to put a giant if around them in the method sublayout, just to see if they are childs of the Manager or not.

Is there something else I can do? as:

stopUpdatingLayout();

reArrangeEverything();

nowYouCanUpdateLayoutAgain();

THX

RGS,

Dan

I have an idea: do the first level or even screen Manager custom with the following substitution of sublayout:

protected void sublayout(int width, int height) {
  boolean layoutDisabled = false;
  synchronized (this) {
    layoutDisabled = this._layoutDisabled;
  }
  if (layoutDisabled) {
    setExtent(width, height); // makes sense for MainScreen, FullScreen etc.
  } else {
    super.sublayout(width, height);
  }
}

Protect the place where you do all your deleteAll() / add manipulations like this:

myMainScreen.layoutDisable(true); // a synchronized method setting _layoutDisabled (see above)
UiApplication.getUiApplication().suspendPainting(true);
//...
// Adding / deleting fields goes here
//...
UiApplication.getUiApplication().suspendPainting(false);
myMainScreen.layoutDisable(false);
UiApplication.getUiApplication().relayout(); // force the re-layout after we enabled it

Just some pseudo-code - hope you can see what I mean...

Tags: BlackBerry Developers

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