Mouse and Key buttons must share a common NumButtons iota, otherwise …

…the count is off

backends/opengl/input.go

@@ -298,9 +298,9 @@ func (w *Window) doUpdateInput() {
 	w.releaseEvents = w.tempReleaseEvents
 
 	// Clear last frame's temporary status
-	w.tempPressEvents = [pixel.NumKeys]bool{}
-	w.tempReleaseEvents = [pixel.NumKeys]bool{}
-	w.tempInp.repeat = [pixel.NumKeys]bool{}
+	w.tempPressEvents = [pixel.NumButtons]bool{}
+	w.tempReleaseEvents = [pixel.NumButtons]bool{}
+	w.tempInp.repeat = [pixel.NumButtons]bool{}
 	w.tempInp.scroll = pixel.ZV
 	w.tempInp.typed = ""
 

backends/opengl/window.go

@@ -99,14 +99,14 @@ type Window struct {
 
 	prevInp, currInp, tempInp struct {
 		mouse   pixel.Vec
-		buttons [pixel.NumKeys]bool
-		repeat  [pixel.NumKeys]bool
+		buttons [pixel.NumButtons]bool
+		repeat  [pixel.NumButtons]bool
 		scroll  pixel.Vec
 		typed   string
 	}
 
-	pressEvents, tempPressEvents     [pixel.NumKeys]bool
-	releaseEvents, tempReleaseEvents [pixel.NumKeys]bool
+	pressEvents, tempPressEvents     [pixel.NumButtons]bool
+	releaseEvents, tempReleaseEvents [pixel.NumButtons]bool
 
 	prevJoy, currJoy, tempJoy joystickState
 }

input.go

@@ -24,19 +24,8 @@ const (
 	MouseButton7
 	MouseButton8
 
-	// Last iota
-	// NOTE: These will be unexported in the future when Window is move to the pixel package.
-	NumMouseButtons int = iota
-
-	// Aliases
-	MouseButtonLeft   = MouseButton1
-	MouseButtonRight  = MouseButton2
-	MouseButtonMiddle = MouseButton3
-)
-
-const (
 	// List of all keyboard buttons.
-	KeySpace = iota + Button(NumMouseButtons)
+	KeySpace
 	KeyApostrophe
 	KeyComma
 	KeyMinus
@@ -159,7 +148,12 @@ const (
 
 	// Last iota
 	// NOTE: These will be unexported in the future when Window is move to the pixel package.
-	NumKeys int = iota
+	NumButtons int = iota
+
+	// Aliases
+	MouseButtonLeft   = MouseButton1
+	MouseButtonRight  = MouseButton2
+	MouseButtonMiddle = MouseButton3
 )
 
 var buttonNames = map[Button]string{