Re: StackPanel Toggle

I took a look at StackLayoutPanel (StackPanel is similar), and it doesn't have a "hideWidget" method, only a showWidget, which would have enabled us to implement the toggle on the headers by adding a ClickHandler on the Header widgets for instance.

So the only way I see to do what you want is to extend this class or rewrite your own version so that it either has a "hideWidget" method that hides any widget on demand (by its index for instance), or change the private showWidget method so that it doesn't ignore when a header is clicked and already selected, and instead hides it when selected/clicked again. See line 668 here:

https://gwt.googlesource.com/gwt/+/2.8.2/user/src/com/google/gwt/user/client/ui/StackLayoutPanel.java

On Wednesday, October 31, 2018 at 1:01:22 PM UTC-6, Hossein wrote:

@Rogelio, Thanks for your input. Please see animated gif here: http://www.AppyBuilder.com/temp/stackpanel.gif

It uses StackPanel. However, Stackpanel, by default opens-up the 1st panel. What I like to do is to be able to toggle and expand OR collapse (e.g. User Interface panel). 

So, what you are saying is that I need to overwrite the default behavior?

Thanks,

-Hossein.

On Wednesday, October 31, 2018 at 2:16:14 PM UTC-4, Rogelio Flores wrote:

Ok, I forgot about the StackPanel, which already does what you want, except you have to click on the header of each "stacked" panel, so I assume what you want is to click on the "body" of the panel (?) or add the ability to open multiple panels at the same time (?). I don't think StackPanel (or better, you should use StackLayoutPanel), support either of these two capabilities. To create that behavior, see if you can extend and overwrite the default behavior of StackPanel, otherwise, you might want to consider other widget libraries such as DominoUI which already has a Collapse component that supports multiple subpanels to be opened at the same time for example. I don't know of any widget that supports clicking anywhere to collapse/expand:

https://dominokit.github.io/domino-ui-demo/index.html?theme=indigo#components/collapse

On Tuesday, October 30, 2018 at 6:43:02 PM UTC-6, Hossein wrote:

@Rogelio,

Thanks for your response. Please see attached. How would I create that behavior myself? Any help would be appreciated.

Thanks

On Tuesday, October 30, 2018 at 7:13:51 PM UTC-4, Rogelio Flores wrote:

Of course you can always create that behavior yourself, or you could simply put your panel inside a DisclosurePanel:

http://samples.gwtproject.org/samples/Showcase/Showcase.html#!CwDisclosurePanel

On Monday, October 29, 2018 at 2:56:31 PM UTC-6, Hossein wrote:

Is it possible to toggle the StackPanel; i.e. clicking will open; and consecutive click will collapse.

Thanks,

Hossein.

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