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39 
40 #ifndef QWINDOWSMOUSEHANDLER_H
41 #define QWINDOWSMOUSEHANDLER_H
42 
43 #include "qtwindowsglobal.h"
44 #include <QtCore/qt_windows.h>
45 
46 #include <QtCore/qpointer.h>
47 #include <QtCore/qhash.h>
48 #include <QtGui/qevent.h>
49 
50 QT_BEGIN_NAMESPACE
51 
52 class QWindow;
53 class QTouchDevice;
54 
55 class QWindowsMouseHandler
56 {
57     Q_DISABLE_COPY_MOVE(QWindowsMouseHandler)
58 public:
59     QWindowsMouseHandler();
60 
touchDevice()61     QTouchDevice *touchDevice() const { return m_touchDevice; }
62     QTouchDevice *ensureTouchDevice();
63 
64     bool translateMouseEvent(QWindow *widget, HWND hwnd,
65                              QtWindows::WindowsEventType t, MSG msg,
66                              LRESULT *result);
67     bool translateTouchEvent(QWindow *widget, HWND hwnd,
68                              QtWindows::WindowsEventType t, MSG msg,
69                              LRESULT *result);
70     bool translateGestureEvent(QWindow *window, HWND hwnd,
71                                QtWindows::WindowsEventType,
72                                MSG msg, LRESULT *);
73     bool translateScrollEvent(QWindow *window, HWND hwnd,
74                               MSG msg, LRESULT *result);
75 
76     static inline Qt::MouseButtons keyStateToMouseButtons(WPARAM);
77     static inline Qt::KeyboardModifiers keyStateToModifiers(int);
78     static inline int mouseButtonsToKeyState(Qt::MouseButtons);
79 
80     static Qt::MouseButtons queryMouseButtons();
windowUnderMouse()81     QWindow *windowUnderMouse() const { return m_windowUnderMouse.data(); }
clearWindowUnderMouse()82     void clearWindowUnderMouse() { m_windowUnderMouse = nullptr; }
83     void clearEvents();
84 
85 private:
86     inline bool translateMouseWheelEvent(QWindow *window, HWND hwnd,
87                                          MSG msg, LRESULT *result);
88 
89     QPointer<QWindow> m_windowUnderMouse;
90     QPointer<QWindow> m_trackedWindow;
91     QHash<DWORD, int> m_touchInputIDToTouchPointID;
92     QHash<int, QPointF> m_lastTouchPositions;
93     QTouchDevice *m_touchDevice = nullptr;
94     bool m_leftButtonDown = false;
95     QWindow *m_previousCaptureWindow = nullptr;
96     QEvent::Type m_lastEventType = QEvent::None;
97     Qt::MouseButton m_lastEventButton = Qt::NoButton;
98 };
99 
keyStateToMouseButtons(WPARAM wParam)100 Qt::MouseButtons QWindowsMouseHandler::keyStateToMouseButtons(WPARAM wParam)
101 {
102     Qt::MouseButtons mb(Qt::NoButton);
103     if (wParam & MK_LBUTTON)
104         mb |= Qt::LeftButton;
105     if (wParam & MK_MBUTTON)
106         mb |= Qt::MiddleButton;
107     if (wParam & MK_RBUTTON)
108         mb |= Qt::RightButton;
109     if (wParam & MK_XBUTTON1)
110         mb |= Qt::XButton1;
111     if (wParam & MK_XBUTTON2)
112         mb |= Qt::XButton2;
113     return mb;
114 }
115 
keyStateToModifiers(int wParam)116 Qt::KeyboardModifiers QWindowsMouseHandler::keyStateToModifiers(int wParam)
117 {
118     Qt::KeyboardModifiers mods(Qt::NoModifier);
119     if (wParam & MK_CONTROL)
120       mods |= Qt::ControlModifier;
121     if (wParam & MK_SHIFT)
122       mods |= Qt::ShiftModifier;
123     if (GetKeyState(VK_MENU) < 0)
124       mods |= Qt::AltModifier;
125     return mods;
126 }
127 
mouseButtonsToKeyState(Qt::MouseButtons mb)128 int QWindowsMouseHandler::mouseButtonsToKeyState(Qt::MouseButtons mb)
129 {
130     int result = 0;
131     if (mb & Qt::LeftButton)
132         result |= MK_LBUTTON;
133     if (mb & Qt::MiddleButton)
134         result |= MK_MBUTTON;
135     if (mb & Qt::RightButton)
136         result |= MK_RBUTTON;
137     if (mb & Qt::XButton1)
138         result |= MK_XBUTTON1;
139     if (mb & Qt::XButton2)
140         result |= MK_XBUTTON2;
141     return result;
142 }
143 
144 QT_END_NAMESPACE
145 
146 #endif // QWINDOWSMOUSEHANDLER_H
147