Implement touch control

tools/viewer/Viewer.cpp

Index: tools/viewer/Viewer.cpp
diff --git a/tools/viewer/Viewer.cpp b/tools/viewer/Viewer.cpp
index 7dd265e6e2183cd75c4e726410be8a845aa12d41..c8b6aef15b719da6805bd7799210f9999ff59577 100644
--- a/tools/viewer/Viewer.cpp
+++ b/tools/viewer/Viewer.cpp
@@ -224,10 +224,8 @@ void Viewer::updateMatrix(){
         m.postTranslate(cx, cy);
     }
 
-    // TODO: add gesture support
-    // Apply any gesture matrix
-    //m.preConcat(fGesture.localM());
-    //m.preConcat(fGesture.globalM());
+    m.preConcat(fWindow->getGestureLocalM());
+    m.preConcat(fWindow->getGestureGlobalM());
 
     fLocalMatrix = m;
 }
@@ -260,6 +258,9 @@ void Viewer::onPaint(SkCanvas* canvas) {
         drawStats(canvas);
     }
     fCommands.drawHelp(canvas);
+
+    // Update the matrix to reflect touch/click zoom or move
+    updateMatrix();

[djsollen, 2016/05/16 19:09:03]

shouldn't this update happen as a reponse to touch input or an inval and not on
every paint?

[liyuqian, 2016/05/16 20:34:55]

Done.

 }
 
 void Viewer::drawStats(SkCanvas* canvas) {