IsMouseEvent boolean on all current mouse events

event/event.go

@@ -27,8 +27,9 @@ type State struct {
 	keydown map[string]interface{}
 
 	// Cursor position
-	CursorX int
-	CursorY int
+	IsMouseEvent bool // A mouse event this tick
+	CursorX      int
+	CursorY      int
 
 	// Window resized
 	WindowResized bool

sdl/events.go

@@ -25,6 +25,7 @@ func (r *Renderer) Poll() (*event.State, error) {
 	// Reset some events.
 	s.WindowResized = false
 	s.Touching = false
+	s.IsMouseEvent = false
 
 	// helper function to push keyboard key names on keyDown events only.
 	pushKey := func(name string, state uint8) {
@@ -56,6 +57,7 @@ func (r *Renderer) Poll() (*event.State, error) {
 					t.Timestamp, sdl.GetTicks(), t.Type, t.Which, t.X, t.Y, t.XRel, t.YRel,
 				)
 			}
+			s.IsMouseEvent = true
 
 			// Push the cursor position.
 			s.CursorX = int(t.X)
@@ -66,6 +68,7 @@ func (r *Renderer) Poll() (*event.State, error) {
 					t.Timestamp, sdl.GetTicks(), t.Type, t.Which, t.X, t.Y, t.Button, t.State,
 				)
 			}
+			s.IsMouseEvent = true
 
 			// Push the cursor position.
 			s.CursorX = int(t.X)
@@ -108,6 +111,7 @@ func (r *Renderer) Poll() (*event.State, error) {
 					t.Timestamp, sdl.GetTicks(), t.Type, t.Which, t.X, t.Y,
 				)
 			}
+			s.IsMouseEvent = true
 		case *sdl.TouchFingerEvent:
 			if DebugTouchEvents {
 				fmt.Printf("[%d ms] tick:%d TouchFinger  type:%d  Finger=%d  TouchID=%+v  Pressure=%f  XY=%f,%f\n",