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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at */
#ifndef WinGesture_h__
#define WinGesture_h__
* nsWinGesture - Touch input handling for tablet displays.
#include "nsdefs.h"
#include <winuser.h>
#include <tpcshrd.h>
#include "nsPoint.h"
#include "mozilla/EventForwards.h"
#include "mozilla/TouchEvents.h"
class nsPointWin : public nsIntPoint {
nsPointWin& operator=(const POINTS& aPoint) {
x = aPoint.x;
y = aPoint.y;
return *this;
nsPointWin& operator=(const POINT& aPoint) {
x = aPoint.x;
y = aPoint.y;
return *this;
nsPointWin& operator=(int val) {
x = y = val;
return *this;
void ScreenToClient(HWND hWnd) {
POINT tmp;
tmp.x = x;
tmp.y = y;
::ScreenToClient(hWnd, &tmp);
*this = tmp;
class nsWinGesture {
bool SetWinGestureSupport(
HWND hWnd, mozilla::WidgetGestureNotifyEvent::PanDirection aDirection);
bool ShutdownWinGestureSupport();
// Simple gesture process
bool ProcessGestureMessage(HWND hWnd, WPARAM wParam, LPARAM lParam,
mozilla::WidgetSimpleGestureEvent& evt);
// Pan processing
bool IsPanEvent(LPARAM lParam);
bool ProcessPanMessage(HWND hWnd, WPARAM wParam, LPARAM lParam);
bool PanDeltaToPixelScroll(mozilla::WidgetWheelEvent& aWheelEvent);
void UpdatePanFeedbackX(HWND hWnd, int32_t scrollOverflow, bool& endFeedback);
void UpdatePanFeedbackY(HWND hWnd, int32_t scrollOverflow, bool& endFeedback);
void PanFeedbackFinalize(HWND hWnd, bool endFeedback);
// Delay load info
bool InitLibrary();
// Pan and feedback state
nsPointWin mPanIntermediate;
nsPointWin mPanRefPoint;
nsPointWin mPixelScrollDelta;
bool mPanActive;
bool mFeedbackActive;
bool mXAxisFeedback;
bool mYAxisFeedback;
bool mPanInertiaActive;
nsPointWin mPixelScrollOverflow;
// Zoom state
double mZoomIntermediate;
// Rotate state
double mRotateIntermediate;
#endif /* WinGesture_h__ */