Added simpler method of detecting window bounds change on draw

backends/x/draw.go

@@ -11,21 +11,16 @@ func (backend *Backend) Draw () {
 	backend.lock.Lock()
 	defer backend.lock.Unlock()
 
-	boundsChanged :=
-		backend.memory.windowWidth  != backend.metrics.windowWidth ||
-		backend.memory.windowHeight != backend.metrics.windowHeight
-	backend.memory.windowWidth  = backend.metrics.windowWidth
-	backend.memory.windowHeight = backend.metrics.windowHeight
-
-	if boundsChanged {
+	if backend.windowBoundsClean {
+		backend.canvas.XPaintRects (
+			backend.window.Id,
+			backend.drawCells(false)...)
+	} else {
 		backend.reallocateCanvas()
 		backend.drawCells(true)
 		backend.canvas.XDraw()
 		backend.canvas.XPaint(backend.window.Id)
-	} else {
-		backend.canvas.XPaintRects (
-			backend.window.Id,
-			backend.drawCells(false)...)
+		backend.windowBoundsClean = true
 	}
 }
 

backends/x/event.go

@@ -46,6 +46,8 @@ func (backend *Backend) handleConfigureNotify (
 			(backend.metrics.windowWidth - frameWidth) / 2
 		backend.metrics.paddingY =
 			(backend.metrics.windowHeight - frameHeight) / 2
+
+		backend.windowBoundsClean = false
 	}
 	
 	backend.lock.Unlock()

backends/x/x.go

@@ -43,10 +43,7 @@ type Backend struct {
 		descent      int
 	}
 
-	memory struct {
-		windowWidth  int
-		windowHeight int
-	}
+	windowBoundsClean bool
 }
 
 func (backend *Backend) SetTitle (title string) (err error) {