widget/windows/nsWinGesture.h

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #ifndef WinGesture_h__
   7 #define WinGesture_h__
   8
   9 /*
  10  * nsWinGesture - Touch input handling for tablet displays.
  11  */
  12
  13 #include "nsdefs.h"
  14 #include <winuser.h>
  15 #include <tpcshrd.h>
  16 #include "nsPoint.h"
  17 #include "mozilla/EventForwards.h"
  18 #include "mozilla/TouchEvents.h"
  19
  20 // WM_TABLET_QUERYSYSTEMGESTURESTATUS return values
  21 #define TABLET_ROTATE_GESTURE_ENABLE 0x02000000
  22
  23 class nsPointWin : public nsIntPoint {
  24  public:
  25   nsPointWin& operator=(const POINTS& aPoint) {
  26     x = aPoint.x;
  27     y = aPoint.y;
  28     return *this;
  29   }
  30   nsPointWin& operator=(const POINT& aPoint) {
  31     x = aPoint.x;
  32     y = aPoint.y;
  33     return *this;
  34   }
  35   nsPointWin& operator=(int val) {
  36     x = y = val;
  37     return *this;
  38   }
  39   void ScreenToClient(HWND hWnd) {
  40     POINT tmp;
  41     tmp.x = x;
  42     tmp.y = y;
  43     ::ScreenToClient(hWnd, &tmp);
  44     *this = tmp;
  45   }
  46 };
  47
  48 class nsWinGesture {
  49  public:
  50   nsWinGesture();
  51
  52  public:
  53   bool SetWinGestureSupport(
  54       HWND hWnd, mozilla::WidgetGestureNotifyEvent::PanDirection aDirection);
  55   bool ShutdownWinGestureSupport();
  56
  57   // Simple gesture process
  58   bool ProcessGestureMessage(HWND hWnd, WPARAM wParam, LPARAM lParam,
  59                              mozilla::WidgetSimpleGestureEvent& evt);
  60
  61   // Pan processing
  62   bool IsPanEvent(LPARAM lParam);
  63   bool ProcessPanMessage(HWND hWnd, WPARAM wParam, LPARAM lParam);
  64   bool PanDeltaToPixelScroll(mozilla::WidgetWheelEvent& aWheelEvent);
  65   void UpdatePanFeedbackX(HWND hWnd, int32_t scrollOverflow, bool& endFeedback);
  66   void UpdatePanFeedbackY(HWND hWnd, int32_t scrollOverflow, bool& endFeedback);
  67   void PanFeedbackFinalize(HWND hWnd, bool endFeedback);
  68
  69  private:
  70   // Delay load info
  71   bool InitLibrary();
  72
  73   // Pan and feedback state
  74   nsPointWin mPanIntermediate;
  75   nsPointWin mPanRefPoint;
  76   nsPointWin mPixelScrollDelta;
  77   bool mPanActive;
  78   bool mFeedbackActive;
  79   bool mXAxisFeedback;
  80   bool mYAxisFeedback;
  81   bool mPanInertiaActive;
  82   nsPointWin mPixelScrollOverflow;
  83
  84   // Zoom state
  85   double mZoomIntermediate;
  86
  87   // Rotate state
  88   double mRotateIntermediate;
  89 };
  90
  91 #endif /* WinGesture_h__ */