add support for setting an explicit min size for libui controls. for now only supported by uiArea.

src/libui_sdl/libui/common/control.c

@@ -62,6 +62,14 @@ void uiControlSetFocus(uiControl *c)
 	(*(c->SetFocus))(c);
 }
 
+void uiControlSetMinSize(uiControl *c, int w, int h)
+{
+    c->MinWidth = w;
+    c->MinHeight = h;
+
+    // TODO: resize if needed
+}
+
 #define uiControlSignature 0x7569436F
 
 uiControl *uiAllocControl(size_t size, uint32_t OSsig, uint32_t typesig, const char *typenamestr)
@@ -72,6 +80,10 @@ uiControl *uiAllocControl(size_t size, uint32_t OSsig, uint32_t typesig, const c
 	c->Signature = uiControlSignature;
 	c->OSSignature = OSsig;
 	c->TypeSignature = typesig;
+
+	c->MinWidth = -1;
+	c->MinHeight = -1;
+
 	return c;
 }
 

src/libui_sdl/libui/ui.h

@@ -73,6 +73,8 @@ struct uiControl {
 	void (*Enable)(uiControl *);
 	void (*Disable)(uiControl *);
 	void (*SetFocus)(uiControl *);
+
+	int MinWidth, MinHeight;
 };
 // TOOD add argument names to all arguments
 #define uiControl(this) ((uiControl *) (this))
@@ -88,6 +90,7 @@ _UI_EXTERN int uiControlEnabled(uiControl *);
 _UI_EXTERN void uiControlEnable(uiControl *);
 _UI_EXTERN void uiControlDisable(uiControl *);
 _UI_EXTERN void uiControlSetFocus(uiControl *);
+_UI_EXTERN void uiControlSetMinSize(uiControl *, int w, int h); // -1 = no minimum
 
 _UI_EXTERN uiControl *uiAllocControl(size_t n, uint32_t OSsig, uint32_t typesig, const char *typenamestr);
 _UI_EXTERN void uiFreeControl(uiControl *);

src/libui_sdl/libui/windows/area.cpp

@@ -55,9 +55,11 @@ uiWindowsControlAllDefaults(uiArea)
 
 static void uiAreaMinimumSize(uiWindowsControl *c, int *width, int *height)
 {
-	// TODO
-	*width = 1;
-	*height = 1;
+	*width = c->c.MinWidth;
+	if (*width < 1) *width = 1;
+
+	*height = c->c.MinHeight;
+	if (*height < 1) *height = 1;
 }
 
 ATOM registerAreaClass(HICON hDefaultIcon, HCURSOR hDefaultCursor)

src/libui_sdl/main.cpp

@@ -592,6 +592,7 @@ int main(int argc, char** argv)
 
     MainDrawArea = uiNewArea(&areahandler);
     uiWindowSetChild(MainWindow, uiControl(MainDrawArea));
+    uiControlSetMinSize(uiControl(MainDrawArea), 256, 384);
 
     EmuRunning = 2;
     RunningSomething = false;