[BUG] xtd::forms - Adding collapsible_panel::parent call results in very minimal main window

[jimorc]

Describe the bug

Calling collapsible_panel::parent to attach to a form or panel causes the program to start with a minimal title bar and nothing else. See the screenshot below.

To Reproduce

Steps to reproduce the behavior:

1. Build and execute the sample program collapsible_panel.cpp. Program opens with display as shown in screenshot.
2. Comment out the lines

   collapsible_panel2.parent(*this);
   ...
   collapsible_panel1.parent(*this);

3. Build and execute. Program opens with form1 client area visible.

Expected behaviour

Program should open with form1 client area visible and containing the collapsible panels.

Screenshots

Desktop (please complete the following information)

• OS: MacOS
• Version: 12.5.1
  • xtd version: from master a few days ago

Additional context

N/A

Workaround

None known

[gammasoft71]

The development of the collapsible_panel control is not yet finished. There is a draft at the moment which is far from being satisfactory. It is planned for version 0.2.0.

For more information see the roadmap, Kanban board and the related issue #60.

Duplicate #60.