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comparison: widget/windows/nsWinGesture.h

widget/windows/nsWinGesture.h

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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 // Desktop builds target apis for 502. Win8 Metro builds target 602.
21 #if WINVER < 0x0602
22
23 DECLARE_HANDLE(HGESTUREINFO);
24
25 /*
26 * Gesture flags - GESTUREINFO.dwFlags
27 */
28 #define GF_BEGIN 0x00000001
29 #define GF_INERTIA 0x00000002
30 #define GF_END 0x00000004
31
32 /*
33 * Gesture configuration structure
34 * - Used in SetGestureConfig and GetGestureConfig
35 * - Note that any setting not included in either GESTURECONFIG.dwWant or
36 * GESTURECONFIG.dwBlock will use the parent window's preferences or
37 * system defaults.
38 */
39 typedef struct tagGESTURECONFIG {
40 DWORD dwID; // gesture ID
41 DWORD dwWant; // settings related to gesture ID that are to be turned on
42 DWORD dwBlock; // settings related to gesture ID that are to be turned off
43 } GESTURECONFIG, *PGESTURECONFIG;
44
45 /*
46 * Gesture information structure
47 * - Pass the HGESTUREINFO received in the WM_GESTURE message lParam into the
48 * GetGestureInfo function to retrieve this information.
49 * - If cbExtraArgs is non-zero, pass the HGESTUREINFO received in the WM_GESTURE
50 * message lParam into the GetGestureExtraArgs function to retrieve extended
51 * argument information.
52 */
53 typedef struct tagGESTUREINFO {
54 UINT cbSize; // size, in bytes, of this structure (including variable length Args field)
55 DWORD dwFlags; // see GF_* flags
56 DWORD dwID; // gesture ID, see GID_* defines
57 HWND hwndTarget; // handle to window targeted by this gesture
58 POINTS ptsLocation; // current location of this gesture
59 DWORD dwInstanceID; // internally used
60 DWORD dwSequenceID; // internally used
61 ULONGLONG ullArguments; // arguments for gestures whose arguments fit in 8 BYTES
62 UINT cbExtraArgs; // size, in bytes, of extra arguments, if any, that accompany this gesture
63 } GESTUREINFO, *PGESTUREINFO;
64 typedef GESTUREINFO const * PCGESTUREINFO;
65
66 /*
67 * Gesture notification structure
68 * - The WM_GESTURENOTIFY message lParam contains a pointer to this structure.
69 * - The WM_GESTURENOTIFY message notifies a window that gesture recognition is
70 * in progress and a gesture will be generated if one is recognized under the
71 * current gesture settings.
72 */
73 typedef struct tagGESTURENOTIFYSTRUCT {
74 UINT cbSize; // size, in bytes, of this structure
75 DWORD dwFlags; // unused
76 HWND hwndTarget; // handle to window targeted by the gesture
77 POINTS ptsLocation; // starting location
78 DWORD dwInstanceID; // internally used
79 } GESTURENOTIFYSTRUCT, *PGESTURENOTIFYSTRUCT;
80
81
82 /*
83 * Gesture argument helpers
84 * - Angle should be a double in the range of -2pi to +2pi
85 * - Argument should be an unsigned 16-bit value
86 */
87 #define GID_ROTATE_ANGLE_TO_ARGUMENT(_arg_) ((USHORT)((((_arg_) + 2.0 * 3.14159265) / (4.0 * 3.14159265)) * 65535.0))
88 #define GID_ROTATE_ANGLE_FROM_ARGUMENT(_arg_) ((((double)(_arg_) / 65535.0) * 4.0 * 3.14159265) - 2.0 * 3.14159265)
89
90 /*
91 * Gesture configuration flags
92 */
93 #define GC_ALLGESTURES 0x00000001
94
95 #define GC_ZOOM 0x00000001
96
97 #define GC_PAN 0x00000001
98 #define GC_PAN_WITH_SINGLE_FINGER_VERTICALLY 0x00000002
99 #define GC_PAN_WITH_SINGLE_FINGER_HORIZONTALLY 0x00000004
100 #define GC_PAN_WITH_GUTTER 0x00000008
101 #define GC_PAN_WITH_INERTIA 0x00000010
102
103 #define GC_ROTATE 0x00000001
104
105 #define GC_TWOFINGERTAP 0x00000001
106
107 #define GC_PRESSANDTAP 0x00000001
108
109 /*
110 * Gesture IDs
111 */
112 #define GID_BEGIN 1
113 #define GID_END 2
114 #define GID_ZOOM 3
115 #define GID_PAN 4
116 #define GID_ROTATE 5
117 #define GID_TWOFINGERTAP 6
118 #define GID_PRESSANDTAP 7
119
120 // Maximum number of gestures that can be included
121 // in a single call to SetGestureConfig / GetGestureConfig
122 #define GESTURECONFIGMAXCOUNT 256
123
124 // If specified, GetGestureConfig returns consolidated configuration
125 // for the specified window and it's parent window chain
126 #define GCF_INCLUDE_ANCESTORS 0x00000001
127
128 // Window events we need to respond to or receive
129 #define WM_GESTURE 0x0119
130 #define WM_GESTURENOTIFY 0x011A
131
132 typedef struct _TOUCHINPUT {
133 LONG x;
134 LONG y;
135 HANDLE hSource;
136 DWORD dwID;
137 DWORD dwFlags;
138 DWORD dwMask;
139 DWORD dwTime;
140 ULONG_PTR dwExtraInfo;
141 DWORD cxContact;
142 DWORD cyContact;
143 } TOUCHINPUT, *PTOUCHINPUT;
144
145 typedef HANDLE HTOUCHINPUT;
146
147 #define WM_TOUCH 0x0240
148
149 #define TOUCHEVENTF_MOVE 0x0001
150 #define TOUCHEVENTF_DOWN 0x0002
151 #define TOUCHEVENTF_UP 0x0004
152 #define TOUCHEVENTF_INRANGE 0x0008
153 #define TOUCHEVENTF_PRIMARY 0x0010
154 #define TOUCHEVENTF_NOCOALESCE 0x0020
155 #define TOUCHEVENTF_PEN 0x0040
156 #define TOUCHEVENTF_PALM 0x0080
157
158 #define TOUCHINPUTMASKF_TIMEFROMSYSTEM 0x0001
159 #define TOUCHINPUTMASKF_EXTRAINFO 0x0002
160 #define TOUCHINPUTMASKF_CONTACTAREA 0x0004
161
162 #define TOUCH_COORD_TO_PIXEL(C) (C/100)
163
164 #define TWF_FINETOUCH 0x0001
165 #define TWF_WANTPALM 0x0002
166
167 #endif // WINVER < 0x0602
168
169 // WM_TABLET_QUERYSYSTEMGESTURESTATUS return values
170 #define TABLET_ROTATE_GESTURE_ENABLE 0x02000000
171
172 class nsPointWin : public nsIntPoint
173 {
174 public:
175 nsPointWin& operator=(const POINTS& aPoint) {
176 x = aPoint.x; y = aPoint.y;
177 return *this;
178 }
179 nsPointWin& operator=(const POINT& aPoint) {
180 x = aPoint.x; y = aPoint.y;
181 return *this;
182 }
183 nsPointWin& operator=(int val) {
184 x = y = val;
185 return *this;
186 }
187 void ScreenToClient(HWND hWnd) {
188 POINT tmp;
189 tmp.x = x; tmp.y = y;
190 ::ScreenToClient(hWnd, &tmp);
191 *this = tmp;
192 }
193 };
194
195 class nsWinGesture
196 {
197 public:
198 nsWinGesture();
199
200 public:
201 bool SetWinGestureSupport(HWND hWnd, mozilla::WidgetGestureNotifyEvent::ePanDirection aDirection);
202 bool ShutdownWinGestureSupport();
203 bool RegisterTouchWindow(HWND hWnd);
204 bool UnregisterTouchWindow(HWND hWnd);
205 bool GetTouchInputInfo(HTOUCHINPUT hTouchInput, uint32_t cInputs, PTOUCHINPUT pInputs);
206 bool CloseTouchInputHandle(HTOUCHINPUT hTouchInput);
207 bool IsAvailable();
208
209 // Simple gesture process
210 bool ProcessGestureMessage(HWND hWnd, WPARAM wParam, LPARAM lParam, mozilla::WidgetSimpleGestureEvent& evt);
211
212 // Pan processing
213 bool IsPanEvent(LPARAM lParam);
214 bool ProcessPanMessage(HWND hWnd, WPARAM wParam, LPARAM lParam);
215 bool PanDeltaToPixelScroll(mozilla::WidgetWheelEvent& aWheelEvent);
216 void UpdatePanFeedbackX(HWND hWnd, int32_t scrollOverflow, bool& endFeedback);
217 void UpdatePanFeedbackY(HWND hWnd, int32_t scrollOverflow, bool& endFeedback);
218 void PanFeedbackFinalize(HWND hWnd, bool endFeedback);
219
220 public:
221 // Helpers
222 bool GetGestureInfo(HGESTUREINFO hGestureInfo, PGESTUREINFO pGestureInfo);
223 bool CloseGestureInfoHandle(HGESTUREINFO hGestureInfo);
224 bool GetGestureExtraArgs(HGESTUREINFO hGestureInfo, UINT cbExtraArgs, PBYTE pExtraArgs);
225 bool SetGestureConfig(HWND hWnd, UINT cIDs, PGESTURECONFIG pGestureConfig);
226 bool GetGestureConfig(HWND hWnd, DWORD dwFlags, PUINT pcIDs, PGESTURECONFIG pGestureConfig);
227 bool BeginPanningFeedback(HWND hWnd);
228 bool EndPanningFeedback(HWND hWnd);
229 bool UpdatePanningFeedback(HWND hWnd, LONG offsetX, LONG offsetY, BOOL fInInertia);
230
231 protected:
232
233 private:
234 // Function prototypes
235 typedef BOOL (WINAPI * GetGestureInfoPtr)(HGESTUREINFO hGestureInfo, PGESTUREINFO pGestureInfo);
236 typedef BOOL (WINAPI * CloseGestureInfoHandlePtr)(HGESTUREINFO hGestureInfo);
237 typedef BOOL (WINAPI * GetGestureExtraArgsPtr)(HGESTUREINFO hGestureInfo, UINT cbExtraArgs, PBYTE pExtraArgs);
238 typedef BOOL (WINAPI * SetGestureConfigPtr)(HWND hwnd, DWORD dwReserved, UINT cIDs, PGESTURECONFIG pGestureConfig, UINT cbSize);
239 typedef BOOL (WINAPI * GetGestureConfigPtr)(HWND hwnd, DWORD dwReserved, DWORD dwFlags, PUINT pcIDs, PGESTURECONFIG pGestureConfig, UINT cbSize);
240 typedef BOOL (WINAPI * BeginPanningFeedbackPtr)(HWND hWnd);
241 typedef BOOL (WINAPI * EndPanningFeedbackPtr)(HWND hWnd, BOOL fAnimateBack);
242 typedef BOOL (WINAPI * UpdatePanningFeedbackPtr)(HWND hWnd, LONG offsetX, LONG offsetY, BOOL fInInertia);
243 typedef BOOL (WINAPI * RegisterTouchWindowPtr)(HWND hWnd, ULONG flags);
244 typedef BOOL (WINAPI * UnregisterTouchWindowPtr)(HWND hWnd);
245 typedef BOOL (WINAPI * GetTouchInputInfoPtr)(HTOUCHINPUT hTouchInput, uint32_t cInputs, PTOUCHINPUT pInputs, int32_t cbSize);
246 typedef BOOL (WINAPI * CloseTouchInputHandlePtr)(HTOUCHINPUT hTouchInput);
247
248 // Static function pointers
249 static GetGestureInfoPtr getGestureInfo;
250 static CloseGestureInfoHandlePtr closeGestureInfoHandle;
251 static GetGestureExtraArgsPtr getGestureExtraArgs;
252 static SetGestureConfigPtr setGestureConfig;
253 static GetGestureConfigPtr getGestureConfig;
254 static BeginPanningFeedbackPtr beginPanningFeedback;
255 static EndPanningFeedbackPtr endPanningFeedback;
256 static UpdatePanningFeedbackPtr updatePanningFeedback;
257 static RegisterTouchWindowPtr registerTouchWindow;
258 static UnregisterTouchWindowPtr unregisterTouchWindow;
259 static GetTouchInputInfoPtr getTouchInputInfo;
260 static CloseTouchInputHandlePtr closeTouchInputHandle;
261
262 // Delay load info
263 bool InitLibrary();
264
265 static HMODULE sLibraryHandle;
266 static const wchar_t kGestureLibraryName[];
267
268 // Pan and feedback state
269 nsPointWin mPanIntermediate;
270 nsPointWin mPanRefPoint;
271 nsPointWin mPixelScrollDelta;
272 bool mPanActive;
273 bool mFeedbackActive;
274 bool mXAxisFeedback;
275 bool mYAxisFeedback;
276 bool mPanInertiaActive;
277 nsPointWin mPixelScrollOverflow;
278
279 // Zoom state
280 double mZoomIntermediate;
281
282 // Rotate state
283 double mRotateIntermediate;
284 };
285
286 #endif /* WinGesture_h__ */
287
288

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