Transition to another screen

tolmachevroman · ‎05-05-2011

Hi everyone,

I'm trying to implement screen transition, but nothing happens - newly pushed screen appears momentally, without any transitions at all. No errors in debugger. What I do is:

LevelCompleteSplashScreen spl = new LevelCompleteSplashScreen();
    	TransitionContext tr = new TransitionContext(TransitionContext.TRANSITION_SLIDE);
    	tr.setIntAttribute(TransitionContext.ATTR_DURATION, 1000);
    	tr.setIntAttribute(TransitionContext.ATTR_DIRECTION, TransitionContext.DIRECTION_RIGHT);
    	tr.setIntAttribute(TransitionContext.ATTR_STYLE, TransitionContext.STYLE_PUSH);

    	Ui.getUiEngineInstance().setTransition(null, spl, UiEngineInstance.TRIGGER_PUSH, tr);

and after some event in my app I just push this spl. I checked TransitionContext instance, it is not null, but it doesn't work. How do I do such a simple transition ?

ahmadahmad · ‎05-31-2011

here a simple

import net.rim.device.api.ui.*;
import net.rim.device.api.ui.component.*;
import net.rim.device.api.ui.container.*;
import net.rim.device.api.ui.decor.*;
public class ScreenTransitionSample extends UiApplication implements
FieldChangeListener {
private Screen _secondaryScreen;
private Runnable _popRunnable;
public static void main(String[] args) {
ScreenTransitionSample theApp = new ScreenTransitionSample ();
theApp.enterEventDispatcher();
}
public ScreenTransitionSample () {
_secondaryScreen = new FullScreen();
_secondaryScreen.setBackground(
BackgroundFactory.createSolidBackground(Color.LIGHTBLUE) );
LabelField labelField = new LabelField("The screen closes automatically in
two seconds by using a fade transition");
_secondaryScreen.add(labelField);
TransitionContext transition = new
TransitionContext(TransitionContext.TRANSITION_SLIDE);
transition.setIntAttribute(TransitionContext.ATTR_DURATION, 500);
transition.setIntAttribute(TransitionContext.ATTR_DIRECTION,
TransitionContext.DIRECTION_RIGHT);
transition.setIntAttribute(TransitionContext.ATTR_STYLE,
TransitionContext.STYLE_PUSH);
UiEngineInstance engine = Ui.getUiEngineInstance();
engine.setTransition(null, _secondaryScreen, UiEngineInstance.TRIGGER_PUSH,
transition);
transition = new TransitionContext(TransitionContext.TRANSITION_FADE);
transition.setIntAttribute(TransitionContext.ATTR_DURATION, 500);
transition.setIntAttribute(TransitionContext.ATTR_KIND,
TransitionContext.KIND_OUT);
engine.setTransition(_secondaryScreen, null, UiEngineInstance.TRIGGER_POP,
transition);
MainScreen baseScreen = new MainScreen();
baseScreen.setTitle("Screen Transition Sample");
ButtonField buttonField = new ButtonField("View Transition",
ButtonField.CONSUME_CLICK) ;
buttonField.setChangeListener(this);
baseScreen.add(buttonField);
pushScreen(baseScreen);
_popRunnable = new Runnable() {
public void run() {
popScreen(_secondaryScreen);
}
};
}
public void fieldChanged(Field field, int context)
{
pushScreen(_secondaryScreen);
invokeLater(_popRunnable, 2000, false);
}
}

tolmachevroman · ‎05-05-2011

thanx for replying but I've read this example at

http://docs.blackberry.com/en/developers/deliverables/11958/Screen_transitions_detailed_overview_806...

The reason I created new post is that I face problems implementing this example. I tried to follow this as closely as possible, but no results so far.

And a small notice - you can use code button on the panel to insert chunks, its much more readable.

tolmachevroman · ‎05-05-2011

Ok, finally I got things working. I guess the reason was this part:

UiApplication.getUiApplication().pushScreen(new LevelCompleteSplashScreen());

I misunderstood and didn't use explicitly created spl. Now I just replaced this new instance with spl and transition works. Thanks for everyone reading and spending your time.

rocketsciencegh · ‎06-12-2012

okay, so could you post the new working sample to help some of us here?

kamal_nigam · ‎07-23-2012

******************* working sample*************************************

UiEngineInstance engine = Ui.getUiEngineInstance();

//this for push animation

TransitionContext transition = new TransitionContext(TransitionContext.TRANSITION_SLIDE);
transition.setIntAttribute(TransitionContext.ATTR_DURATION, 500);
transition.setIntAttribute(TransitionContext.ATTR_DIRECTION,
TransitionContext.DIRECTION_RIGHT);
transition.setIntAttribute(TransitionContext.ATTR_STYLE,
TransitionContext.STYLE_PUSH);
engine.setTransition(null, screen, UiEngineInstance.TRIGGER_PUSH, transition);

//this for pop animation

transition = new TransitionContext(TransitionContext.TRANSITION_SLIDE);
transition.setIntAttribute(TransitionContext.ATTR_DURATION, 500);
transition.setIntAttribute(TransitionContext.ATTR_DIRECTION,
TransitionContext.DIRECTION_RIGHT);
engine.setTransition(screen, null, UiEngineInstance.TRIGGER_POP, transition);

UiApplication.getUiApplication().pushScreen(screen); (screen is object of main screen which you are going to push into stack)

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