Graeme Geldenhuys schrieb:

Moreover it can't work for TWinControl which has a window - HWND or GdkWindow since that windows are not transparent.

So how else would you create a transparent container component in LCL?

Some time ago I already suggested to introduce a new container or layout layer, between TControl and TWinControl. This TLayoutControl class could implement all kind of layout managers, e.g. anchor and tree docking (layout wise); the drag-dock support still could be reserved for windowed controls, depending on the widgetset constraints.

DoDi


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