Fixed alpha transparency on Haiku, or so it seems. Assorted other notes too.

haiku/area.cpp

@@ -79,6 +79,11 @@ uiArea *uiNewArea(uiAreaHandler *ah)
 	a->area->a = a;
 	// TODO background color
 
+	// this is needed for alpha transparency (thanks mmu_man in irc.freenode.net/#haiku)
+	// unfortunately TODO it kills the other compositing modes
+	// (remember that if we ever drop Windows 7 we can use those)
+	a->area->SetDrawingMode(B_OP_ALPHA);
+
 	uiHaikuFinishNewControl(a, uiArea);
 
 	return a;

haiku/draw.cpp

@@ -3,8 +3,6 @@
 #include "uipriv_haiku.hpp"
 using namespace std;
 
-// TODO alpha doesn't work
-
 struct uiDrawPath {
 	BShape *shape;
 	uiDrawFillMode fillMode;

windows/stddialogs.c

@@ -5,6 +5,9 @@
 // - FOS_SUPPORTSTREAMABLEITEMS doesn't seem to be supported on windows vista, or at least not with the flags we use
 // - even with FOS_NOVALIDATE the dialogs will reject invalid filenames (at least on Vista, anyway)
 
+// TODO
+// - http://blogs.msdn.com/b/wpfsdk/archive/2006/10/26/uncommon-dialogs--font-chooser-and-color-picker-dialogs.aspx
+
 char *commonItemDialog(REFCLSID clsid, REFIID iid, FILEOPENDIALOGOPTIONS optsadd)
 {
 	IFileDialog *d;