After some research, I found a few more serious issues with Gtk3. I will not bother filing bugs as the issues seem too ingrained to the implementation.
Here are some problems: 1) TGtkWidget makes custom drawing an inaccessible private field value that cannot be set. What this means is that only certain predefined widgets (with enumerated contents) in Gtk3Widgets.pas are allowed to receive paint handling events. 2) The CreateWidget virtual method of TGtkWidget is designed to create an underlying Gtk3 widget instance. But the design makes brings inheritance problems, as you cannot make use of the inherited CreateWidget implementation if you want a different widget type. For example, a TCustomControl backed by a Gtk.DrawingArea. 3) TGtkWidget is defined as having a "property Widget: PGtkWidget". PGtkWidget is ^TGtkWidget. TGtkWidget is not a TGtkWidget. Ridiculous. 4) There are a reduplication of header file translations, and they are each incomplete in their own different ways. There is LazGtk3.pas and Gtk3.pas, LazGdk3.pas and Gdk3, Pango and LazPango1. The latter names in the list are duplicates to the lclgtk3 widgetset and are incomplete and different from the former named units. 5) Colors are not being handled correctly with the Gtk3 implementation. I don't know how many I have found where clWindowText is not being correctly translated to a valid RGB (ColorToRGB). For example on my system theme clWindowText is near white, but with lots of code parts of this Gtk3 implementation it's translated to near black because no RGB translations are being made. 6) All drawing is being handled by cairo on Gtk3 and drawing on a parent control (a Form for example) can change the drawing state in a child control (TPaintBox for example). If I invalidate a form and draw using a transform, the paintbox drawing is automatically transformed. There are cairo functions to preserve the state, but they are not being used correclty in the Gtk3 widgetset implementation. 7) There are lots of other problems. I completed a couple of tasks related
-- _______________________________________________ lazarus mailing list lazarus@lists.lazarus-ide.org https://lists.lazarus-ide.org/listinfo/lazarus
