- Added button align code:

uiBlockBeginAlign(block, 'v');  'v'= vertical. 'h'=horizontal
  ..... (button def calls)
  uiBlockEndAlign(block);

  this will allow new themes to have buttons nicely drawn together.
- added new rounded draw theme, to test & illustrate the above.
- only did parts of button code with align... rest for later
- fixed 'minimal' theme to make it usable (with some decoration)
- put back 'oldskool' theme... but it just looks plain ugly! remove?

Lazy people: http://www.blender.org/bf/rt.jpg
check the top header, or Nkey menu, to see the meaning of 'align'.

source/blender/include/BIF_interface.h

@@ -74,6 +74,7 @@ struct ScrArea;
 #define UI_BLOCK_BUSY		8
 #define UI_BLOCK_NUMSELECT	16
 #define UI_BLOCK_ENTER_OK	32
+	/* block->flag bits 12-15 are identical to but->flag bits */
 
 /* block->font, for now: bold = medium+1 */
 #define UI_HELV			0
@@ -100,6 +101,13 @@ struct ScrArea;
 #define UI_MAKE_RIGHT	1024
 	/* dont draw hilite on mouse over */
 #define UI_NO_HILITE	2048
+	/* button align flag, for drawing groups together */
+#define UI_BUT_ALIGN		(15<<12)
+#define UI_BUT_ALIGN_TOP	(1<<12)
+#define UI_BUT_ALIGN_LEFT	(1<<13)
+#define UI_BUT_ALIGN_RIGHT	(1<<14)
+#define UI_BUT_ALIGN_DOWN	(1<<15)
+
 
 /* Button types */
 #define CHA	32
@@ -166,6 +174,10 @@ void uiFreeBlocks(struct ListBase *lb);
 void uiFreeBlocksWin(struct ListBase *lb, int win);
 uiBlock *uiNewBlock(struct ListBase *lb, char *name, short dt, short font, short win);
 uiBlock *uiGetBlock(char *name, struct ScrArea *sa);
+
+void uiBlockBeginAlign(uiBlock *block, char dir);
+void uiBlockEndAlign(uiBlock *block);
+
 uiBut *uiDefBut(uiBlock *block, 
 					   int type, int retval, char *str, 
 					   short x1, short y1, 

source/blender/include/interface.h

@@ -111,8 +111,9 @@ typedef struct {
 
 struct uiBut {
 	uiBut *next, *prev;
-	short type, pointype, bit, bitnr, retval, flag, strwidth, ofs, pos;
-
+	short type, pointype, bit, bitnr, retval, strwidth, ofs, pos;
+	int flag;
+	
 	char *str;
 	char strdata[UI_MAX_NAME_STR];
 	char drawstr[UI_MAX_DRAW_STR];
@@ -182,13 +183,12 @@ struct uiBlock {
 	void (*drawextra)();
 
 	int themecol;	/* themecolor id */
-	short but_align;	/* aligning buttons, horiz/vertical */
 	
 	short font;	/* indices */
-	int afterval;
+	int afterval, flag;
 	void *curfont;
 	
-	short autofill, flag, win, winq, direction, dt, frontbuf, auto_open;  //frontbuf see below
+	short autofill, win, winq, direction, dt, frontbuf, auto_open;  //frontbuf see below
 	void *saveunder;
 	
 	float xofs, yofs;  	// offset to parent button
@@ -208,6 +208,7 @@ extern void ui_window_to_graphics(int win, float *x, float *y);
 /* interface_panel.c */
 extern void ui_draw_panel(uiBlock *block);
 extern void ui_do_panel(uiBlock *block, uiEvent *uevent);
+extern void gl_round_box(float minx, float miny, float maxx, float maxy, float rad);
 
 /* interface_draw.c */
 extern void ui_set_embossfunc(uiBut *but, int drawtype);