coords

include/Mw/Core.h

@@ -354,6 +354,11 @@ MWDECL void MwGetCursorCoord(MwWidget handle, MwPoint* point);
  */
 MWDECL void MwGetScreenSize(MwWidget handle, MwRect* rect);
 
+/*!
+ * @brief Reports whether a widget reports global or local coordinates upon GetXY/SetXY. Anything with a parent reports local, and most backends report global coordinates being supported for top level windows, but some (Wayland) do not.
+ */
+MWDECL int MwGetCoordinateType(MwWidget handle);
+
 #ifdef __cplusplus
 }
 #endif

include/Mw/LowLevel.h

@@ -33,6 +33,7 @@ struct _MwLLCommon {
 	void* user;
 	int   copy_buffer;
 	int   type;
+	int   coordinate_type;
 
 	MwLLHandler handler;
 };

include/Mw/TypeDefs.h

@@ -219,4 +219,10 @@ struct _MwClass {
 	void*			   reserved4;
 };
 
+/* Whether or not GetXY/SetXY works with global or local coordinates */
+enum MwCoordinateType {
+	MwCoordinatesGlobal = 0,
+	MwCoordinatesLocal,
+};
+
 #endif

src/backend/wayland.c

@@ -1344,6 +1344,10 @@ static MwLL MwLLCreateImpl(MwLL parent, int x, int y, int width, int height) {
 	memset(r, 0, sizeof(*r));
 	MwLLCreateCommon(r);
 
+	/* Wayland does not report global coordinates ever. Compositors are not even expected to have knowledge of this.
+	 */
+	r->common.coordinate_type = MwCoordinatesLocal;
+
 	r->common.type = MwLLBackendWayland;
 
 	if(width < 2) width = 2;

src/core.c

@@ -797,3 +797,11 @@ void MwGetCursorCoord(MwWidget handle, MwPoint* point) {
 void MwGetScreenSize(MwWidget handle, MwRect* rect) {
 	MwLLGetScreenSize(handle->lowlevel, rect);
 }
+
+int MwGetCoordinateType(MwWidget handle) {
+	if(handle->parent == NULL) {
+		return handle->lowlevel->common.coordinate_type;
+	} else {
+		return MwCoordinatesLocal;
+	}
+};

src/widget/submenu.c

@@ -183,10 +183,18 @@ static void mwSubMenuAppearImpl(MwWidget handle, MwMenu menu, MwPoint* point, in
 	MwLLMakeToolWindow(handle->lowlevel);
 	MwLLDetach(handle->lowlevel, &p);
 
-	if(MwGetInteger(handle, MwNy) + sz.height > rc.height) {
-		MwVaApply(handle,
-			  MwNy, rc.height - sz.height,
-			  NULL);
+	if(handle->lowlevel->common.coordinate_type == MwCoordinatesGlobal) {
+		if(MwGetInteger(handle, MwNy) + sz.height > rc.height) {
+			MwVaApply(handle,
+				  MwNy, rc.height - sz.height,
+				  NULL);
+		}
+	} else {
+		if(MwGetInteger(handle, MwNy) > sz.height) {
+			MwVaApply(handle,
+				  MwNy, sz.height,
+				  NULL);
+		}
 	}
 
 	MwLLEndStateChange(handle->lowlevel);