Add input state queries

application.go

@@ -36,16 +36,20 @@ func (application *Application) Run (callback func (application *Application)) {
 		color.RGBA { R: 0xFF, G: 0xFF, B: 0xFF, A: 0xFF },
 	}
 
+	// TODO: instead, return the error
+	var err error
+	application.backend, err = instantiateBackend(application)
+	if err != nil { panic(err.Error()) }
 	application.backend.Run(callback)
 }
 
 func (application *Application) Await (timeout time.Duration) (keepRunning bool) {
-	keepRunning = application.Await(timeout)
+	keepRunning = application.backend.Await(timeout)
 	return
 }
 
 func (application *Application) Poll () (keepRunning bool) {
-	keepRunning = application.Poll()
+	keepRunning = application.backend.Poll()
 	return
 }
 
@@ -59,10 +63,10 @@ func (application *Application) Config () (config *Config) {
 	return
 }
 
-// func (application *Application) Resized () (resized bool) {
-	// resized = application.boundsDirty
-	// return
-// }
+func (application *Application) Resized () (resized bool) {
+	resized = application.backend.Resized()
+	return
+}
 
 
 // // updateWindowSize updates the window size according to the buffer size.

backends/pixel/pixel.go

@@ -83,6 +83,36 @@ func (backend *Backend) SetTitle (title string) {
 	}
 }
 
+func (backend *Backend) JustPressed (button stone.Button) (pressed bool) {
+	pressed = backend.window.JustPressed(pixelgl.Button(button))
+	return
+}
+
+func (backend *Backend) JustReleased (button stone.Button) (released bool) {
+	released = backend.window.JustReleased(pixelgl.Button(button))
+	return
+}
+
+func (backend *Backend) Pressed (button stone.Button) (pressed bool) {
+	pressed = backend.window.Pressed(pixelgl.Button(button))
+	return
+}
+
+func (backend *Backend) Repeated (button stone.Button) (repeated bool) {
+	repeated = backend.window.Repeated(pixelgl.Button(button))
+	return
+}
+
+func (backend *Backend) Typed () (text string) {
+	text = backend.window.Typed()
+	return
+}
+
+func (backend *Backend) Resized () (resized bool) {
+	resized = backend.boundsDirty
+	return
+}
+
 func (backend *Backend) draw () {
 	didDrawing := false