backends/x/event.go

@@ -32,7 +32,19 @@ func (backend *Backend) handleConfigureNotify (
 	if sizeChanged {
 		configureEvent =
 			backend.compressConfigureNotify(configureEvent)
-		backend.application.SetSize(backend.calculateBufferSize())
+
+		// resize buffer
+		width, height := backend.calculateBufferSize()
+		backend.application.SetSize(width, height)
+
+		// position buffer in the center of the screen
+		frameWidth  := width  * backend.metrics.cellWidth
+		frameHeight := height * backend.metrics.cellHeight
+		backend.metrics.paddingX =
+			(backend.metrics.windowWidth - frameWidth) / 2
+		backend.metrics.paddingY =
+			(backend.metrics.windowHeight - frameHeight) / 2
+		
 		backend.channel <- stone.EventResize { }
 	}
 }