[CRD iOS] Trackpad Input Mode

remoting/client/ui/input_strategy.h

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef REMOTING_CLIENT_UI_INPUT_STRATEGY_H_
 #define REMOTING_CLIENT_UI_INPUT_STRATEGY_H_
 
 #include "remoting/client/ui/view_matrix.h"
 
 namespace remoting {
 
 class DesktopViewport;
 
 // This is an interface used by GestureInterpreter to customize the way gestures
 // are handled.
 class InputStrategy {
  public:
   enum InputFeedbackType {
     TAP_FEEDBACK,
-    LONG_PRESS_FEEDBACK,
+    DRAG_FEEDBACK,
+  };
+
+  enum Gesture {
+    NONE,
+    ZOOM,
+    DRAG,
   };
 
   virtual ~InputStrategy() {}
 
-  // Called when the GestureInterpreter receives a pinch gesture. The
+  // Called when the GestureInterpreter receives a zoom gesture. The
   // implementation is responsible for modifying the viewport and observing the
   // change.
-  virtual void HandlePinch(const ViewMatrix::Point& pivot,
-                           float scale,
-                           DesktopViewport* viewport) = 0;
+  virtual void HandleZoom(const ViewMatrix::Point& pivot,
+                          float scale,
+                          DesktopViewport* viewport) = 0;
 
   // Called when the GestureInterpreter receives a pan gesture. The
   // implementation is responsible for modifying the viewport and observing the
   // change.
-  // is_dragging_mode: true if the user is trying to drag something while
-  //     panning on the screen.
-  virtual void HandlePan(const ViewMatrix::Vector2D& translation,
-                         bool is_dragging_mode,
+  // simultaneous_gesture: Gesture that is simultaneously in progress.
+  // Returns true if this changes the cursor position.
+  virtual bool HandlePan(const ViewMatrix::Vector2D& translation,
+                         Gesture simultaneous_gesture,
                          DesktopViewport* viewport) = 0;
 
   // Called when a touch input (which will end up injecting a mouse event at
   // certain position in the host) is done at |touch_point|.
   // The implementation should move the cursor to proper position.
   virtual void TrackTouchInput(const ViewMatrix::Point& touch_point,
                                const DesktopViewport& viewport) = 0;
 
   // Returns the current cursor position.
   virtual ViewMatrix::Point GetCursorPosition() const = 0;
@@ skipping 11 matching lines @@
   // should be shown.
   virtual float GetFeedbackRadius(InputFeedbackType type) const = 0;
 
   // Returns true if the input strategy maintains a visible cursor on the
   // desktop.
   virtual bool IsCursorVisible() const = 0;
 };
 
 }  // namespace remoting
 #endif  // REMOTING_CLIENT_UI_INPUT_STRATEGY_H_