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39 
40 #ifndef QWINDOWSINPUTCONTEXT_H
41 #define QWINDOWSINPUTCONTEXT_H
42 
43 #include <QtCore/qt_windows.h>
44 
45 #include <QtCore/qlocale.h>
46 #include <QtCore/qpointer.h>
47 #include <qpa/qplatforminputcontext.h>
48 
49 QT_BEGIN_NAMESPACE
50 
51 class QInputMethodEvent;
52 class QWindowsWindow;
53 
54 class QWindowsInputContext : public QPlatformInputContext
55 {
56     Q_DISABLE_COPY_MOVE(QWindowsInputContext)
57     Q_OBJECT
58 
59     struct CompositionContext
60     {
61         HWND hwnd = nullptr;
62         QString composition;
63         int position = 0;
64         bool isComposing = false;
65         QPointer<QObject> focusObject;
66     };
67 public:
68     explicit QWindowsInputContext();
69     ~QWindowsInputContext() override;
70 
71     static void setWindowsImeEnabled(QWindowsWindow *platformWindow, bool enabled);
72 
73     bool hasCapability(Capability capability) const override;
locale()74     QLocale locale() const override { return m_locale; }
75 
76     void reset() override;
77     void update(Qt::InputMethodQueries) override;
78     void invokeAction(QInputMethod::Action, int cursorPosition) override;
79     void setFocusObject(QObject *object) override;
80 
81     QRectF keyboardRect() const override;
82     bool isInputPanelVisible() const override;
83     void showInputPanel() override;
84     void hideInputPanel() override;
85 
86     bool startComposition(HWND hwnd);
87     bool composition(HWND hwnd, LPARAM lParam);
88     bool endComposition(HWND hwnd);
isComposing()89     inline bool isComposing() const { return m_compositionContext.isComposing; }
90 
91     int reconvertString(RECONVERTSTRING *reconv);
92 
93     bool handleIME_Request(WPARAM wparam, LPARAM lparam, LRESULT *result);
94     void handleInputLanguageChanged(WPARAM wparam, LPARAM lparam);
95 
96 private slots:
97     void cursorRectChanged();
98 
99 private:
100     void initContext(HWND hwnd, QObject *focusObject);
101     void doneContext();
102     void startContextComposition();
103     void endContextComposition();
104     void updateEnabled();
105     HWND getVirtualKeyboardWindowHandle() const;
106 
107     const DWORD m_WM_MSIME_MOUSE;
108     bool m_caretCreated = false;
109     HBITMAP m_transparentBitmap;
110     CompositionContext m_compositionContext;
111     bool m_endCompositionRecursionGuard = false;
112     LCID m_languageId;
113     QLocale m_locale;
114 };
115 
116 QT_END_NAMESPACE
117 
118 #endif // QWINDOWSINPUTCONTEXT_H
119