GUI2: added code for minimal buttons (buttons sans background)

data/gui/widget/button_25x25.cfg

@@ -261,5 +261,95 @@
 	()
 }
 
+#
+# Minimal-style buttons
+# These buttons don't have a background, only the overlay
+#
+
+#define _GUI_RESOLUTION_MINIMAL RESOLUTION SIZE IMAGE
+	[resolution]
+
+		{RESOLUTION}
+
+		min_width = {SIZE}
+		min_height = {SIZE}
+
+		default_width = {SIZE}
+		default_height = {SIZE}
+
+		max_width = {SIZE}
+		max_height = {SIZE}
+
+		[state_enabled]
+
+			[draw]
+
+				[image]
+					w = {SIZE}
+					h = {SIZE}
+					name = {IMAGE} + ".png"
+				[/image]
+
+			[/draw]
+
+		[/state_enabled]
+
+		[state_disabled]
+
+			[draw]
+
+				[image]
+					w = {SIZE}
+					h = {SIZE}
+					name = {IMAGE} + ".png~GS()"
+				[/image]
+
+			[/draw]
+
+		[/state_disabled]
+
+		[state_pressed]
+
+			[draw]
+
+				[image]
+					w = {SIZE}
+					h = {SIZE}
+					name = {IMAGE} + "-pressed.png"
+				[/image]
+
+			[/draw]
+
+		[/state_pressed]
+
+		[state_focused]
+
+			[draw]
+
+				[image]
+					w = {SIZE}
+					h = {SIZE}
+					name = {IMAGE} + "-active.png"
+				[/image]
+
+			[/draw]
+
+		[/state_focused]
+
+	[/resolution]
+#enddef
+
+#define _GUI_DEFINITION_MINIMAL ID DESCRIPTION IMAGE
+[button_definition]
+	id = {ID}
+	description = {DESCRIPTION}
+
+	{_GUI_RESOLUTION_MINIMAL () 25 ({IMAGE})}
+
+[/button_definition]
+#enddef
+
 #undef _GUI_DEFINITION
+#undef _GUI_DEFINITION_MINIMAL
 #undef _GUI_RESOLUTION
+#undef _GUI_RESOLUTION_MINIMAL