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    Default Sencha GXT Grid and overlap over components

    Sencha GXT Grid and overlap over components


    I am using the sencha grid component and sometimes after the grid completes rendering, it will overlap on top of components above the grid. For example, if I add a search box field at row1 and then the paging grid on row2. The paging grid will overlap the component in row1 so you can't see the search box.


    Is there anyway for this component to refresh properly?


    import com.sencha.gxt.widget.core.client.grid.Grid;


    VerticalLayoutContainer container = new VerticalLayoutContainer();
    container.add(new FieldLabel() new VerticalLayoutContainer.VerticalLayoutData(.99, .1, new Margins(2, 2, 2, 2)));
    applicantGrid = new Grid();
    container.add(applicantGrid, new VerticalLayoutContainer.VerticalLayoutData(.99, .8, new Margins(2, 2, 2, 2)));
    So the field label (row1) will not get shown properly because the 'applicantGrid' is slightly overlapping the row1 field label.


    Is there a refresh or something I can do to the 'Grid' widget to make it work properly.

    GXT version: 3.0.1

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    Yes. The problem is in your layout data. Remember, values < 0 mean use the actual height/width, values from zero to including 1 are treated as percentages, and values over 1 are treated as pixels.

    What you most likely want is 1.0, -1.0 for your first row and 1.0, 1.0 for your grid. This tells the first row to render at 100% width and actual height and the grid to be 100% width and take up all the remaining vertical space.

    If you need to add anything else to your VLC, e.g., a paging tool bar, that would probably be 1.0, -1.0 as well but obviously depends on your needs/use case.

    Give that a go and see if it fixes your problem. If not, you may need to call forceLayout() on the VLC after rendering but this is not always needed.

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    inner.clear();
    final Widget w = event.getContainer().asWidget();
    inner.add(w, new VerticalLayoutContainer.VerticalLayoutData(1, 1));
    this.forceLayout();

    Another issue also, we are clearing and then re-adding those components. I wonder if there is a better 'refresh' type of operation.

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    It looks like the verticallayout data with gxt allows me to use 0 to 1 values. Where each percentage is a percentage is a percentage of that particular portion of screen out of 1.0.

    Is there a way to have components add naturally so that I dont' have to define the height with vertical layout data.

    E.g. if I add a textfield of height 30px and then a gridpanel of 70px. I don't have to use verticallayoutdata with 0.3 and 0.7. Can I just add those widgets.

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    What type of widget is "inner?" If it's a HasOneWidget, you don't need the clear because setWidget will remove the old widget if it exists.

    Since you are dynamically changing out the contents of stuff, the forceLayout() may be necessary and this is essentially the "refresh" operation.

    To answer your other question, I don't know. Try creating a widget of a fixed size, and then calling VLC.add(...) without any layout data. I think it should work, but am not sure.

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    If you call setPixelWidth and setPixelHeight, using -1 is ok or omitting the VLD all together is fine. No VLD implies -1.0, -1.0.

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