osx: add gesture support

sqweek · Apr 16, 2016 · 780d12d · 780d12d
1 parent 805bb27
commit 780d12d
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Showing 2 changed files with 11 additions and 0 deletions.
diff --git a/sqribe_wde.go b/sqribe_wde.go
@@ -104,6 +104,10 @@ func event(win wde.Window, redraw chan Widget, done chan bool, wg *sync.WaitGrou
 				cur = G.ww.MouseMoved(e.Where)
 			}
 			win.SetCursor(cur)
+		case wde.ScrollEvent:
+			G.ww.ScrollPixels(-e.Delta.X)
+		case wde.MagnifyEvent:
+			G.ww.Zoom(1.0 / e.Magnification)
 		case wde.KeyDownEvent:
 			switch e.Key {
 			case wde.KeyLeftShift, wde.KeyRightShift:

diff --git a/ww.go b/ww.go
@@ -389,6 +389,13 @@ func (ww *WaveWidget) ScrollPixels(dx int) int {
 
 func (ww *WaveWidget) Zoom(factor float64) float64 {
 	fpp := int(float64(ww.frames_per_pixel) * factor)
+	if fpp == ww.frames_per_pixel {
+		if factor < 1.0 {
+			fpp--
+		} else if factor > 1.0 {
+			fpp++
+		}
+	}
 	if fpp < 1 {
 		fpp = 1
 	}