How to use ResizerWidget in Dlangui app..?

[ShadoLight]

On Wednesday, 1 January 2020 at 10:52:02 UTC, Ron Tarrant wrote:
> On Monday, 30 December 2019 at 23:32:37 UTC, ShadoLight wrote:
>> dragging with the left mouse button does nothing.
>
>>     Window window = Platform.instance.createWindow("DlangUI 
>> example", null);
>
> I'm not familiar with this toolkit, but my guess is that you 
> didn't pass in a `flags` value and therefore you aren't using 
> the appropriate overload of the createWindow() function to 
> achieve what you're after.
>
> The following is from the DLangUI GitHub site 
> (https://github.com/buggins/dlangui/wiki/Getting-Started). Take 
> a look at the third argument:
>
> Window createWindow(
>     dstring windowCaption, // window caption
>     Window parent,         // parent window, pass null for main 
> (first) window.
>     uint flags = WindowFlag.Resizable, // various flags - bit 
> fields from WindowFlag enum values
>     uint width = 0,        // initial window width
>     uint height = 0        // initial window height
> );

Thanks for the reply, Ron.

Yes, as you say WindowFlag.Resizable is the default value for the 
'flags' argument in the createWindow call, so that was the 
setting I had.

But the problem is actually not in resizing the full app window 
(that actually works - including keeping the relative proportions 
of the widget children sizes), but rather in resizing 2 widgets 
that are separated by a ResizerWidget inside the app window. The 
app window size should actually not be affected since, as 1 
widget on one side of the ResizerWidget shrinks by N pixels in 
height or width (depending on the orientation of the 
ResizerWidget), the opposite widget should grow by the same N 
pixels in height/width, leaving the parent size unaffected.

I can see that is actually what is coded, but it is not working 
when I run the app.

But I thought you may be on to something and I should check if 
children widgets of the app window inherits some settings from 
the parent, so I checked the WindowFlag flags. According to [1] 
you can have:
- Fullscreen
- Modal
- Resizable

However, checking the code there are additional options:
/// window creation flags
enum WindowFlag : uint {
     /// window can be resized
     Resizable = 1,
     /// window should be shown in fullscreen mode
     Fullscreen = 2,
     /// modal window - grabs input focus
     Modal = 4,
     /// measure window size on window.show() - helps if you want 
scrollWindow but on show() you want to set window to mainWidget 
measured size
     MeasureSize = 8,
     /// window without decorations
     Borderless = 16,
     /// expand window size if main widget minimal size is greater 
than size defined in window constructor
     ExpandSize = 32,
}

So it looks like the documentation isn't completely up to date 
either. Anyway, I also tried to pass WindowFlag.Resizable | 
WindowFlag.MeasureSize as flags argument in the call to 
createWindow, but it did not help.

I was hoping for a quick answer on the forum from someone who has 
run into the same, but I think I'm going to need to dig into 
dlangui code to figure out what is going wrong.

[1]: 
http://buggins.github.io/dlangui/ddox/dlangui/platforms/common/platform/WindowFlag.html