ui/app: rename DrawEvent to UpdateEvent and Window.Draw to Window.Update

Window.Draw is not the right name for a method that does more than
just drawing. Rename to Update instead, and rename the DrawEvent
accordingly for symmetry.

Signed-off-by: Elias Naur <mail@eliasnaur.com>

ui/app/app.go

@@ -13,9 +13,9 @@ import (
 	"gioui.org/ui"
 )
 
-// DrawEvent is sent when a Window's Draw
+// UpdateEvent is sent when a Window's Update
 // method must be called.
-type DrawEvent struct {
+type UpdateEvent struct {
 	Config Config
 	Size   image.Point
 	Insets Insets
@@ -178,7 +178,7 @@ func newWindowRendezvous() *windowRendezvous {
 	return wr
 }
 
-func (_ DrawEvent) ImplementsEvent()     {}
+func (_ UpdateEvent) ImplementsEvent()   {}
 func (_ StageEvent) ImplementsEvent()    {}
 func (_ *CommandEvent) ImplementsEvent() {}
 func (_ DestroyEvent) ImplementsEvent()  {}

ui/app/os_android.go

@@ -300,7 +300,7 @@ func (w *window) draw(sync bool) {
 		return
 	}
 	ppdp := float32(w.dpi) * inchPrDp
-	w.event(DrawEvent{
+	w.event(UpdateEvent{
 		Size: image.Point{
 			X: int(width),
 			Y: int(height),

ui/app/os_ios.go

@@ -80,7 +80,7 @@ func onDraw(view C.CFTypeRef, dpi, sdpi, width, height C.CGFloat, sync C.int, to
 	if sync != 0 {
 		isSync = true
 	}
-	w.w.event(DrawEvent{
+	w.w.event(UpdateEvent{
 		Size: image.Point{
 			X: int(width + .5),
 			Y: int(height + .5),

ui/app/os_js.go

@@ -345,7 +345,7 @@ func (w *window) draw(sync bool) {
 	w.scale = float32(scale)
 	w.mu.Unlock()
 	cfg.now = time.Now()
-	w.w.event(DrawEvent{
+	w.w.event(UpdateEvent{
 		Size: image.Point{
 			X: width,
 			Y: height,

ui/app/os_macos.go

@@ -198,7 +198,7 @@ func (w *window) draw(sync bool) {
 	cfg := configFor(w.ppdp, w.scale)
 	cfg.now = time.Now()
 	w.setStage(StageRunning)
-	w.w.event(DrawEvent{
+	w.w.event(UpdateEvent{
 		Size: image.Point{
 			X: width,
 			Y: height,

ui/app/os_wayland.go

@@ -1050,7 +1050,7 @@ func (w *window) draw(sync bool) {
 		C.gio_wl_callback_add_listener(w.lastFrameCallback, unsafe.Pointer(w.surf))
 	}
 	cfg.now = time.Now()
-	w.w.event(DrawEvent{
+	w.w.event(UpdateEvent{
 		Size: image.Point{
 			X: width,
 			Y: height,

ui/app/os_windows.go

@@ -420,7 +420,7 @@ func (w *window) draw(sync bool) {
 	w.height = int(r.bottom - r.top)
 	cfg := configForDC(w.hdc)
 	cfg.now = time.Now()
-	w.w.event(DrawEvent{
+	w.w.event(UpdateEvent{
 		Size: image.Point{
 			X: w.width,
 			Y: w.height,

ui/app/window.go

@@ -59,7 +59,7 @@ type driverEvent struct {
 // of a Window.
 var _ interface {
 	// setAnimating sets the animation flag. When the window is animating,
-	// DrawEvents are delivered as fast as the display can handle them.
+	// UpdateEvents are delivered as fast as the display can handle them.
 	setAnimating(anim bool)
 	// showTextInput updates the virtual keyboard state.
 	showTextInput(show bool)
@@ -104,7 +104,7 @@ func (w *Window) Queue() *Queue {
 	return &w.queue
 }
 
-func (w *Window) Draw(frame *ui.Ops) {
+func (w *Window) Update(frame *ui.Ops) {
 	w.frames <- frame
 }
 
@@ -138,7 +138,7 @@ func (w *Window) draw(size image.Point, frame *ui.Ops) {
 	w.updateAnimation()
 }
 
-// Invalidate the current window such that a DrawEvent will be generated
+// Invalidate the current window such that a UpdateEvent will be generated
 // immediately. If the window is not active, the redraw will trigger
 // when the window becomes active.
 func (w *Window) Invalidate() {
@@ -237,7 +237,7 @@ func (w *Window) run(opts *WindowOptions) {
 				w.updateAnimation()
 				w.out <- e
 				w.waitAck()
-			case DrawEvent:
+			case UpdateEvent:
 				if e2.Size == (image.Point{}) {
 					panic(errors.New("internal error: zero-sized Draw"))
 				}