Set up work for rearranging control layout to be depth-first and to relayout the entire window on a change.

redo/reredo/control.c

@@ -42,6 +42,21 @@ uiControl *uiControlParent(uiControl *c)
 	return cb->parent;
 }
 
+// returns self if self is a window
+uiControl *toplevelOwning(uiControl *c)
+{
+	struct controlBase *cb;
+
+	for (;;) {
+		if (uiIsA(c, uiWindowType(), 0) != NULL)
+			return c;
+		cb = controlBase(c);
+		if (cb->parent == NULL)
+			return NULL;
+		c = cb->parent;
+	}
+}
+
 static void controlUpdateState(uiControl *);
 
 void uiControlSetParent(uiControl *c, uiControl *parent)

redo/reredo/darwin/control.m

@@ -10,14 +10,15 @@ uintmax_t uiDarwinControlType(void)
 	return type_uiDarwinControl;
 }
 
-void uiDarwinControlRelayoutParent(uiDarwinControl *c)
+void uiDarwinControlTriggerRelayout(uiDarwinControl *c)
 {
 	uiControl *p;
 
-	p = uiControlParent(uiControl(c));
+	p = toplevelOwning(uiControl(c));
-	if (p == NULL)
+	if (p == NULL)		// not in a window
 		return;
-	(*(uiDarwinControl(p)->Relayout))(uiDarwinControl(p));
+	c = uiDarwinControl(p);
+	(*(c->Relayout))(uiDarwinControl(c));
 }
 
 void osCommitShow(uiControl *c)

redo/reredo/ui_darwin.h

@@ -15,7 +15,7 @@ struct uiDarwinControl {
 _UI_EXTERN uintmax_t uiDarwinControlType(void);
 #define uiDarwinControl(this) ((uiDarwinControl *) uiIsA((this), uiDarwinControlType(), 1))
 // TODO document
-_UI_EXTERN void uiDarwinControlRelayoutParent(uiDarwinControl *);
+_UI_EXTERN void uiDarwinControlTriggerRelayout(uiDarwinControl *);
 
 // TODO document
 #define uiDarwinDefineControlWithOnDestroy(type, typefn, handlefield, onDestroy) \
@@ -42,7 +42,7 @@ _UI_EXTERN void uiDarwinControlRelayoutParent(uiDarwinControl *);
 	} \
 	static void _ ## type ## Relayout(uiDarwinControl *c) \
 	{ \
-		uiDarwinControlRelayoutParent(uiDarwinControl(c)); \
+		/* do nothing */ \
 	}
 
 #define uiDarwinDefineControl(type, typefn, handlefield) \

redo/reredo/uipriv.h

@@ -15,6 +15,8 @@ extern void uiFree(void *);
 
 extern void complain(const char *, ...);
 
+extern uiControl *toplevelOwning(uiControl *);
+
 extern void osCommitShow(uiControl *);
 extern void osCommitHide(uiControl *);
 extern void osCommitEnable(uiControl *);