ui/app: drop Event

input.Event is enough if we stretch "input" to mean both input
devices and other events such as profiling events and system
commands.

The pointer and key packages are separate already, so I don't
expanding the meaning is unreasonable.

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

ui/app/app.go

@@ -13,10 +13,6 @@ import (
 	"gioui.org/ui"
 )
 
-type Event interface {
-	ImplementsEvent()
-}
-
 // DrawEvent is sent when a Window's Draw
 // method must be called.
 type DrawEvent struct {

ui/app/window.go

@@ -27,8 +27,8 @@ type Window struct {
 	drawStart time.Time
 	gpu       *gpu.GPU
 
-	out         chan Event
-	in          chan Event
+	out         chan input.Event
+	in          chan input.Event
 	ack         chan struct{}
 	invalidates chan struct{}
 	frames      chan *ui.Ops
@@ -66,7 +66,7 @@ var _ interface {
 } = (*window)(nil)
 
 // Pre-allocate the ack event to avoid garbage.
-var ackEvent Event
+var ackEvent input.Event
 
 // NewWindow creates a new window for a set of window
 // options. The options are hints; the platform is free to
@@ -86,8 +86,8 @@ func NewWindow(opts *WindowOptions) *Window {
 	}
 
 	w := &Window{
-		in:          make(chan Event),
-		out:         make(chan Event),
+		in:          make(chan input.Event),
+		out:         make(chan input.Event),
 		ack:         make(chan struct{}),
 		invalidates: make(chan struct{}, 1),
 		frames:      make(chan *ui.Ops),
@@ -96,7 +96,7 @@ func NewWindow(opts *WindowOptions) *Window {
 	return w
 }
 
-func (w *Window) Events() <-chan Event {
+func (w *Window) Events() <-chan input.Event {
 	return w.out
 }
 
@@ -178,7 +178,7 @@ func (w *Window) setDriver(d *window) {
 	w.event(driverEvent{d})
 }
 
-func (w *Window) event(e Event) {
+func (w *Window) event(e input.Event) {
 	w.in <- e
 	<-w.ack
 }
@@ -289,18 +289,18 @@ func (w *Window) run(opts *WindowOptions) {
 			case *CommandEvent:
 				w.out <- e
 				w.waitAck()
-			case input.Event:
-				if w.queue.q.Add(e2) {
-					w.setNextFrame(time.Time{})
-					w.updateAnimation()
-				}
-				w.out <- e
 			case driverEvent:
 				w.driver = e2.driver
 			case DestroyEvent:
 				w.out <- e2
 				w.ack <- struct{}{}
 				return
+			case input.Event:
+				if w.queue.q.Add(e2) {
+					w.setNextFrame(time.Time{})
+					w.updateAnimation()
+				}
+				w.out <- e
 			}
 			w.ack <- struct{}{}
 		}

ui/input/input.go

@@ -14,7 +14,7 @@ type Queue interface {
 // For a handler h, the key is typically &h.
 type Key interface{}
 
-// Event is the marker interface for input events.
+// Event is the marker interface for events.
 type Event interface {
-	ImplementsInputEvent()
+	ImplementsEvent()
 }

ui/key/key.go

@@ -80,9 +80,6 @@ func (h HideInputOp) Add(o *ui.Ops) {
 	o.Write(data)
 }
 
-func (EditEvent) ImplementsEvent()       {}
-func (ChordEvent) ImplementsEvent()      {}
-func (FocusEvent) ImplementsEvent()      {}
-func (EditEvent) ImplementsInputEvent()  {}
-func (ChordEvent) ImplementsInputEvent() {}
-func (FocusEvent) ImplementsInputEvent() {}
+func (EditEvent) ImplementsEvent()  {}
+func (ChordEvent) ImplementsEvent() {}
+func (FocusEvent) ImplementsEvent() {}

ui/pointer/pointer.go

@@ -182,5 +182,4 @@ func (s Source) String() string {
 	}
 }
 
-func (Event) ImplementsEvent()      {}
-func (Event) ImplementsInputEvent() {}
+func (Event) ImplementsEvent() {}

ui/system/system.go

@@ -38,4 +38,4 @@ func (p *ProfileOp) Decode(d []byte, refs []interface{}) {
 	}
 }
 
-func (p ProfileEvent) ImplementsInputEvent() {}
+func (p ProfileEvent) ImplementsEvent() {}