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  1. #1
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    Exclamation CenterLayoutContainer : Container misses the Resize command ?

    CenterLayoutContainer : Container misses the Resize command ?


    On gxt 3.0.0 beta 2, i have an simple CenterLayoutContainer with a single panel inside it (a copy-paste from the showcase actually). But i was surprised, the content of my container is not centered, but located in the upper-left side of the my screen!
    Here is my listing

    Code:
    public class CenterLayoutExample implements EntryPoint {
    
    
        public void onModuleLoad() {
            CenterLayoutContainer con = new CenterLayoutContainer();
            ContentPanel panel = new ContentPanel();
            panel.setBodyStyle("padding: 6px");
            panel.setHeadingText("CenterLayout");
            panel.add(new Label("I should be centered"));
            panel.setWidth(200);
            con.add(panel);
            RootLayoutPanel.get().add(con);
        }
    }
    BUT, if i manually resize the browser window, then the container is moved to the center of my browser window. (cf images attached : first image, at the startup of the application ; second image, after i manually resize the application).
    If i add a deffered command to trigger a resize operation on the RootLayoutPanel, the container is immediately when i start the application.

    Code:
    Scheduler.get().scheduleDeferred(new ScheduledCommand() {
        public void execute() {
            RootLayoutPanel.get().onResize();
        }
    });
    So my assumption is that the container ignores the some resize operation at the startup of the application ...
    Attached Images

  2. #2
    Sencha User rohdef's Avatar
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    Try wrapping the CenterLayoutContainer into a SimpleContainer if I recall correctly that solved my problems. This is probably due some layout calls that the underlying GWT doesn't do (probably due to it not being GXT), although I think I had similar problems in some GXT containers.

    Code:
    public class CenterLayoutExample implements EntryPoint {
    
        public void onModuleLoad() {
            SimpleContainer outerContainer = new SimpleContainer();
            CenterLayoutContainer con = new CenterLayoutContainer();
            ContentPanel panel = new ContentPanel();
            panel.setBodyStyle("padding: 6px");
            panel.setHeadingText("CenterLayout");
            panel.add(new Label("I should be centered"));
            panel.setWidth(200);
            con.add(panel);
            outerContainer.setWidget(con);
            RootLayoutPanel.get().add(outerContainer);
        }
    }

  3. #3
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    You need to size your CenterLayoutContainer. Else it will not work correctly.

  4. #4
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    Thanks for your reply.

    But what if i want my container to fill the whole browser window ? I'd expected the same behavior as straight gwt panels which automatically fill the window browser when i add them to RootLayoutPanel.get(). It's kind of difficult to get interoperability between panels of gxt and those from gwt if the behave differently when added to RootLayoutPanel.
    I think it's a bug.

    thanks

    HR

  5. #5
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    Sorry i missed that you are using RootLayoutPanel. In that case you simple need to call forceLayout on it:

    RootLayoutPanel.get().forceLayout();

  6. #6
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    Thanks for your reply, steven.

    Hermann

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