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GTK+ 3 uses GdkRGBA instead of GdkColor. GdkColor is widely used through SWT, some classes have number of getter/setter functions that return GdkColor. What is the expected procedure to substitute GdkColor with GdkRGBA? Should GdkRGBA has its own getter/setter methods ? If yes what is the naming policy of this methods, should this getter/setters be flagged that they are for Gtk+ 3 only ? As an example of use of GdkColor here are methods from Control.java: GdkColor getForegroundColor () { return getFgColor (); } GdkColor getFgColor () { int /*long*/ fontHandle = fontHandle (); OS.gtk_widget_realize (fontHandle); GdkColor color = new GdkColor (); OS.gtk_style_get_fg (OS.gtk_widget_get_style (fontHandle), OS.GTK_STATE_NORMAL, color); return color; } ....etc Implementation of GdkRGBA is needed because it is used by GtkStyleContext that replaces GtkStyle in Gtk3.Without GdkRGBA we cannot substitute this GtkStyle methods: gtk_style_get_bg_gc gtk_style_get_black_gc gtk_style_get_dark_gc gtk_style_get_fg_gc gtk_style_get_light_gc gtk_style_get_mid_gc gtk_style_get_text_aa_gc gtk_style_get_text_gc gtk_style_get_white_gc gtk_style_render_icon
For now, we need to keep our color handle as a GdkColor so that we can run on GTK2, but we have to convert a GdkColor to GdkRGBA and use the new GtkStyleContext API to change colors and fonts on widgets. This is fixed in the branch below. I will push to master when M3 is done. http://git.eclipse.org/c/platform/eclipse.platform.swt.git/log/?h=silenio/Bug389910
Pushed to master.