setting label to "" causes height to go to 0

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howud...@gmail.com

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Oct 17, 2017, 12:26:30 PM10/17/17

to CodenameOne Discussions

IDE: Eclipse
Simulator

When I add a label to BorderLayout.SOUTH and then set the label to "" the height of the label shrinks to 0 or maybe 1 pixel. It seems to happen when using the map container. When I just add it to a simple form, it doesn't shrink, however when I add it to a form that also contains mapcontainer then it makes the label disappear.

The code below reproduces the problem

public class FrmMap extends com.codename1.ui.Form {
	protected MapContainer cnt = new MapContainer(new GoogleMapsProvider("AIzaSyDq8k10JtB2aViAR30rKK-o2zfCAgTQg-0"));
    Container cntMain = new Container(new BorderLayout());
	protected Label lblStatus = new Label("Status");
    public FrmMap() {
        this(Resources.getGlobalResources());
    }
    
    public FrmMap(Resources resourceObjectInstance) {
        initManualComponents();
		Display.getInstance().callSerially(() -> { 
	        centerMapToLocation();
		});
    }
	protected void initManualComponents() {
        setLayout(new BorderLayout());
        setTitle("Map");
        setName("FrmMap");

		this.setScrollable(false);
        cnt.addMapListener(new MapListener() {
			
			@Override
			public void mapPositionUpdated(Component source, int zoom, Coord center) {
				onMapUpdate(zoom, center);
			}
		});
        
        cntMain.add(BorderLayout.CENTER, cnt);
		cntMain.add(BorderLayout.SOUTH, lblStatus);
        
		this.add(BorderLayout.CENTER, cntMain);
	}
		
	protected void centerMapToLocation() {
        LocationManager l = LocationManager.getLocationManager(); 
        l.setLocationListener(new LocationListener() {
        	public void locationUpdated(Location loc) {     
        		Coord c = new Coord(loc.getLatitude(), loc.getLongitude());
        		cnt.zoom(c , 13);
        		l.setLocationListener(null);
        		onMapUpdate(13, c);
        	}

        	public void providerStateChanged(int newState) {
        	}
        }); 
	}

	protected void onMapUpdate(int zoom, Coord center) {
		cnt.clearMapLayers();
		cnt.addMarker(null,
				center,
				"Test", "Test",
				new ActionListener<ActionEvent>() {
					public void actionPerformed(ActionEvent evt) {
						onClickList();
					}
				}
			);
		lblStatus.setText("");
	}
	
	protected void onClickList() {
		Log.p("Clicked");
	}
	
}

Shai Almog

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Oct 18, 2017, 12:35:18 AM10/18/17

to CodenameOne Discussions

That's by design. Blank labels/buttons disappear. The solutions is:

- Use " " instead of ""

- Set an icon

- Use setShowEvenIfBlank(true)

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