"Layout panels" (RequiresResize) need to be sized "from the outside" (they
don't have an "intrinsic size" depending on their content), and this means
you either need to give them an explicit, absolute size (i.e. no
percentages or other relative units) or have an uninterruptible chain of
parent layout panels (RequiresResize/ProvidesResize, or IIRC possibly
HeaderPanel's content widget) up until one has and an explicit, absolute
size, or can give one to its content (RootLayoutPanel or ResizeLayoutPanel)
Your FlowPanels and Composites break that chain. Maybe try using
LayoutPanel/DockLayoutPanel instead (and ResizeComposite).
But understand that this is a fundamental shift in how the UI is built and
behaves (e.g. no scrolling, unless you use ScrollPanels; and no "intrinsic
sizing"). Layout panels are much more "app-y" than "webby".
On Thursday, May 25, 2017 at 3:27:33 PM UTC+2, Harry Wagner wrote:
>
> I have inherited a GWT application that was written back in GWT's 1.x
> days. It has since been migrated to 2.4 but will only run in quirks mode. I
> am tasked with migrating it to 2.8 and making it run in standards mode. It
> is a challenge for me. I have years of Java experience but no GWT
> experience. The app relies heavily on HorizontalPanel and VerticalPanel
> which I am changing to FlowPanel. The app also uses VerticalSplitPanel
> which I am trying to replace with SplitLayoutPanel but can't get the
> splitters to show, even when this LOC "Window.alert("SplitterSize: " +
> rightPanel.getSplitterSize());" indicates 10px, which is what I am
> expecting. I have struggled with this and am wondering if I might be trying
> to do something not in SplitLayoutPanel's nature? Here is what my panel
> layout looks like (I am not using UIBinder). Hopefully downstream
> formatting won't make a mess of the layout.
>
> Should this work, or am I doing something with SplitLayoutPanel that it
> was not designed for? TIA!
>
> Harry
>
> Root Panel (RootLayoutPanel)
> RootWidget (extends FlowPanel)
> Top Panel (FlowPanel)
> hpPanel (FlowPanel)
> cmdPanel (Composite)
> vpPanel(FlowPanel)
> rpPanel (SplitLayoutPanel)
> listPanel (extends FlexTable)
> detailPanel (extends Composite)
> iconPanel (extends FlowPanel)
>
>
> ------------------------------------------
> top panel |
> ------------------------------------------|
> cmdPanel |. listPanel. |
> | |
> | |
> |----- splitter here ----|
> | |
>
> | detailPanel. |
> | |
> |----- splitter here ----|
> | |
> | iconPanel. |
> | |
> ------------------------------------------
> -------------------------------------------
>
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