新增全局热键示例

3rd_qhotkey/3rd_qhotkey.pri

@@ -0,0 +1,20 @@
+CONFIG += C++11
+HEADERS += $$PWD/qhotkey.h
+HEADERS += $$PWD/qhotkey_p.h
+SOURCES += $$PWD/qhotkey.cpp
+
+win32 {
+LIBS += -luser32
+SOURCES += $$PWD/qhotkey_win.cpp
+}
+
+unix:!macx {
+QT += x11extras
+LIBS += -lX11
+SOURCES += $$PWD/qhotkey_x11.cpp
+}
+
+macx {
+LIBS += -framework Carbon
+SOURCES += $$PWD/qhotkey_mac.cpp
+}

3rd_qhotkey/qhotkey.cpp

@@ -0,0 +1,349 @@
+#include "qhotkey.h"
+#include "qhotkey_p.h"
+#include <QCoreApplication>
+#include <QAbstractEventDispatcher>
+#include <QMetaMethod>
+#include <QThread>
+#include <QDebug>
+
+QHotkey::QHotkey(QObject *parent) : QObject(parent)
+{
+    _keyCode = Qt::Key_unknown;
+    _modifiers = Qt::NoModifier;
+    _nativeShortcut = 0;
+    _registered = false;
+}
+
+QHotkey::QHotkey(const QKeySequence &sequence, bool autoRegister, QObject *parent) : QHotkey(parent)
+{
+    setShortcut(sequence, autoRegister);
+}
+
+QHotkey::QHotkey(Qt::Key keyCode, Qt::KeyboardModifiers modifiers, bool autoRegister, QObject *parent) : QHotkey(parent)
+{
+    setShortcut(keyCode, modifiers, autoRegister);
+}
+
+QHotkey::QHotkey(const QHotkey::NativeShortcut &shortcut, bool autoRegister, QObject *parent) : QHotkey(parent)
+{
+    setNativeShortcut(shortcut, autoRegister);
+}
+
+QHotkey::~QHotkey()
+{
+    if (_registered) {
+        QHotkeyPrivate::instance()->removeShortcut(this);
+    }
+}
+
+QKeySequence QHotkey::shortcut() const
+{
+    if (_keyCode == Qt::Key_unknown) {
+        return QKeySequence();
+    } else {
+        return QKeySequence(_keyCode | _modifiers);
+    }
+}
+
+Qt::Key QHotkey::keyCode() const
+{
+    return _keyCode;
+}
+
+Qt::KeyboardModifiers QHotkey::modifiers() const
+{
+    return _modifiers;
+}
+
+QHotkey::NativeShortcut QHotkey::currentNativeShortcut() const
+{
+    return _nativeShortcut;
+}
+
+bool QHotkey::isRegistered() const
+{
+    return _registered;
+}
+
+bool QHotkey::setShortcut(const QKeySequence &shortcut, bool autoRegister)
+{
+    if (shortcut.isEmpty()) {
+        return resetShortcut();
+    } else if (shortcut.count() > 1) {
+        qDebug() << "Keysequences with multiple shortcuts are not allowed Only the first shortcut will be used!";;
+    }
+
+    return setShortcut(Qt::Key(shortcut[0] & ~Qt::KeyboardModifierMask),
+                       Qt::KeyboardModifiers(shortcut[0] & Qt::KeyboardModifierMask),
+                       autoRegister);
+}
+
+bool QHotkey::setShortcut(Qt::Key keyCode, Qt::KeyboardModifiers modifiers, bool autoRegister)
+{
+    if (_registered) {
+        if (autoRegister) {
+            if (!QHotkeyPrivate::instance()->removeShortcut(this)) {
+                return false;
+            }
+        } else {
+            return false;
+        }
+    }
+
+    if (keyCode == Qt::Key_unknown) {
+        _keyCode = Qt::Key_unknown;
+        _modifiers = Qt::NoModifier;
+        _nativeShortcut = NativeShortcut();
+        return true;
+    }
+
+    _keyCode = keyCode;
+    _modifiers = modifiers;
+    _nativeShortcut = QHotkeyPrivate::instance()->nativeShortcut(keyCode, modifiers);
+    if (_nativeShortcut.isValid()) {
+        if (autoRegister) {
+            return QHotkeyPrivate::instance()->addShortcut(this);
+        } else {
+            return true;
+        }
+    } else {
+        qDebug() << "Unable to map shortcut to native keys. Key:" << keyCode << "Modifiers:" << modifiers;
+        _keyCode = Qt::Key_unknown;
+        _modifiers = Qt::NoModifier;
+        _nativeShortcut = NativeShortcut();
+        return false;
+    }
+}
+
+bool QHotkey::resetShortcut()
+{
+    if (_registered &&
+        !QHotkeyPrivate::instance()->removeShortcut(this)) {
+        return false;
+    }
+
+    _keyCode = Qt::Key_unknown;
+    _modifiers = Qt::NoModifier;
+    _nativeShortcut = NativeShortcut();
+    return true;
+}
+
+bool QHotkey::setNativeShortcut(QHotkey::NativeShortcut nativeShortcut, bool autoRegister)
+{
+    if (_registered) {
+        if (autoRegister) {
+            if (!QHotkeyPrivate::instance()->removeShortcut(this)) {
+                return false;
+            }
+        } else {
+            return false;
+        }
+    }
+
+    if (nativeShortcut.isValid()) {
+        _keyCode = Qt::Key_unknown;
+        _modifiers = Qt::NoModifier;
+        _nativeShortcut = nativeShortcut;
+        if (autoRegister) {
+            return QHotkeyPrivate::instance()->addShortcut(this);
+        } else {
+            return true;
+        }
+    } else {
+        _keyCode = Qt::Key_unknown;
+        _modifiers = Qt::NoModifier;
+        _nativeShortcut = NativeShortcut();
+        return true;
+    }
+}
+
+bool QHotkey::setRegistered(bool registered)
+{
+    if (_registered && !registered) {
+        return QHotkeyPrivate::instance()->removeShortcut(this);
+    } else if (!_registered && registered) {
+        if (!_nativeShortcut.isValid()) {
+            return false;
+        } else {
+            return QHotkeyPrivate::instance()->addShortcut(this);
+        }
+    } else {
+        return true;
+    }
+}
+
+
+
+// ---------- QHotkeyPrivate implementation ----------
+
+QHotkeyPrivate::QHotkeyPrivate()
+{
+    shortcuts = QMultiHash<QHotkey::NativeShortcut, QHotkey *>();
+    Q_ASSERT_X(qApp, Q_FUNC_INFO, "QHotkey requires QCoreApplication to be instantiated");
+    qApp->eventDispatcher()->installNativeEventFilter(this);
+}
+
+QHotkeyPrivate::~QHotkeyPrivate()
+{
+    if (!shortcuts.isEmpty()) {
+        qDebug() << "QHotkeyPrivate destroyed with registered shortcuts!";
+    }
+    if (qApp && qApp->eventDispatcher()) {
+        qApp->eventDispatcher()->removeNativeEventFilter(this);
+    }
+}
+
+QHotkey::NativeShortcut QHotkeyPrivate::nativeShortcut(Qt::Key keycode, Qt::KeyboardModifiers modifiers)
+{
+    Qt::ConnectionType conType = (QThread::currentThread() == thread() ?
+                                  Qt::DirectConnection :
+                                  Qt::BlockingQueuedConnection);
+    QHotkey::NativeShortcut res;
+    if (!QMetaObject::invokeMethod(this, "nativeShortcutInvoked", conType,
+                                   Q_RETURN_ARG(QHotkey::NativeShortcut, res),
+                                   Q_ARG(Qt::Key, keycode),
+                                   Q_ARG(Qt::KeyboardModifiers, modifiers))) {
+        return QHotkey::NativeShortcut();
+    } else {
+        return res;
+    }
+}
+
+bool QHotkeyPrivate::addShortcut(QHotkey *hotkey)
+{
+    if (hotkey->_registered) {
+        return false;
+    }
+
+    Qt::ConnectionType conType = (QThread::currentThread() == thread() ?
+                                  Qt::DirectConnection :
+                                  Qt::BlockingQueuedConnection);
+    bool res = false;
+    if (!QMetaObject::invokeMethod(this, "addShortcutInvoked", conType,
+                                   Q_RETURN_ARG(bool, res),
+                                   Q_ARG(QHotkey *, hotkey))) {
+        return false;
+    } else {
+        if (res) {
+            emit hotkey->registeredChanged(true);
+        }
+        return res;
+    }
+}
+
+bool QHotkeyPrivate::removeShortcut(QHotkey *hotkey)
+{
+    if (!hotkey->_registered) {
+        return false;
+    }
+
+    Qt::ConnectionType conType = (QThread::currentThread() == thread() ?
+                                  Qt::DirectConnection :
+                                  Qt::BlockingQueuedConnection);
+    bool res = false;
+    if (!QMetaObject::invokeMethod(this, "removeShortcutInvoked", conType,
+                                   Q_RETURN_ARG(bool, res),
+                                   Q_ARG(QHotkey *, hotkey))) {
+        return false;
+    } else {
+        if (res) {
+            emit hotkey->registeredChanged(false);
+        }
+        return res;
+    }
+}
+
+void QHotkeyPrivate::activateShortcut(QHotkey::NativeShortcut shortcut)
+{
+    QMetaMethod signal = QMetaMethod::fromSignal(&QHotkey::activated);
+    foreach (QHotkey *hkey, shortcuts.values(shortcut)) {
+        signal.invoke(hkey, Qt::QueuedConnection);
+    }
+}
+
+bool QHotkeyPrivate::addShortcutInvoked(QHotkey *hotkey)
+{
+    QHotkey::NativeShortcut shortcut = hotkey->_nativeShortcut;
+
+    if (!shortcuts.contains(shortcut)) {
+        if (!registerShortcut(shortcut)) {
+            return false;
+        }
+    }
+
+    shortcuts.insert(shortcut, hotkey);
+    hotkey->_registered = true;
+    return true;
+}
+
+bool QHotkeyPrivate::removeShortcutInvoked(QHotkey *hotkey)
+{
+    QHotkey::NativeShortcut shortcut = hotkey->_nativeShortcut;
+    if (shortcuts.remove(shortcut, hotkey) == 0) {
+        return false;
+    }
+
+    hotkey->_registered = false;
+    emit hotkey->registeredChanged(true);
+
+    if (shortcuts.count(shortcut) == 0) {
+        return unregisterShortcut(shortcut);
+    } else {
+        return true;
+    }
+}
+
+QHotkey::NativeShortcut QHotkeyPrivate::nativeShortcutInvoked(Qt::Key keycode, Qt::KeyboardModifiers modifiers)
+{
+    bool ok1, ok2 = false;
+    quint32 k = nativeKeycode(keycode, ok1);
+    quint32 m = nativeModifiers(modifiers, ok2);
+    if (ok1 && ok2) {
+        return QHotkey::NativeShortcut(k, m);
+    } else {
+        return QHotkey::NativeShortcut();
+    }
+}
+
+QHotkey::NativeShortcut::NativeShortcut()
+{
+    this->key = Qt::Key_unknown;
+    this->modifier = Qt::NoModifier;
+    this->valid = false;
+}
+
+QHotkey::NativeShortcut::NativeShortcut(quint32 key, quint32 modifier)
+{
+    this->key = key;
+    this->modifier = modifier;
+    this->valid = true;
+}
+
+bool QHotkey::NativeShortcut::isValid() const
+{
+    return valid;
+}
+
+bool QHotkey::NativeShortcut::operator ==(const QHotkey::NativeShortcut &other) const
+{
+    return (key == other.key) &&
+           (modifier == other.modifier) &&
+           valid == other.valid;
+}
+
+bool QHotkey::NativeShortcut::operator !=(const QHotkey::NativeShortcut &other) const
+{
+    return (key != other.key) ||
+           (modifier != other.modifier) ||
+           valid != other.valid;
+}
+
+uint qHash(const QHotkey::NativeShortcut &key)
+{
+    return qHash(key.key) ^ qHash(key.modifier);
+}
+
+uint qHash(const QHotkey::NativeShortcut &key, uint seed)
+{
+    return qHash(key.key, seed) ^ qHash(key.modifier, seed);
+}

3rd_qhotkey/qhotkey.h

@@ -0,0 +1,111 @@
+#ifndef QHOTKEY_H
+#define QHOTKEY_H
+
+#include <QObject>
+#include <QKeySequence>
+#include <QPair>
+
+#ifdef QHOTKEY_LIB
+#ifdef QHOTKEY_LIB_BUILD
+#define QHOTKEY_SHARED_EXPORT Q_DECL_EXPORT
+#else
+#define QHOTKEY_SHARED_EXPORT Q_DECL_IMPORT
+#endif
+#else
+#define QHOTKEY_SHARED_EXPORT
+#endif
+
+//! A class to define global, systemwide Hotkeys
+class QHOTKEY_SHARED_EXPORT QHotkey : public QObject
+{
+    Q_OBJECT
+    friend class QHotkeyPrivate;
+
+    //! Specifies whether this hotkey is currently registered or not
+    Q_PROPERTY(bool registered READ isRegistered WRITE setRegistered NOTIFY registeredChanged)
+    //! Holds the shortcut this hotkey will be triggered on
+    Q_PROPERTY(QKeySequence shortcut READ shortcut WRITE setShortcut RESET resetShortcut)
+
+public:
+    //! Defines shortcut with native keycodes
+    class QHOTKEY_SHARED_EXPORT NativeShortcut
+    {
+    public:
+        //! The native keycode
+        quint32 key;
+        //! The native modifiers
+        quint32 modifier;
+
+        //! Creates an invalid native shortcut
+        NativeShortcut();
+        //! Creates a valid native shortcut, with the given key and modifiers
+        NativeShortcut(quint32 key, quint32 modifier = 0);
+
+        //! Checks, whether this shortcut is valid or not
+        bool isValid() const;
+
+        //! Equality operator
+        bool operator ==(const NativeShortcut &other) const;
+        //! Inequality operator
+        bool operator !=(const NativeShortcut &other) const;
+
+    private:
+        bool valid;
+    };
+
+    //! Constructor
+    explicit QHotkey(QObject *parent = 0);
+    //! Constructs a hotkey with a shortcut and optionally registers it
+    explicit QHotkey(const QKeySequence &shortcut, bool autoRegister = false, QObject *parent = 0);
+    //! Constructs a hotkey with a key and modifiers and optionally registers it
+    explicit QHotkey(Qt::Key keyCode, Qt::KeyboardModifiers modifiers, bool autoRegister = false, QObject *parent = 0);
+    //! Constructs a hotkey from a native shortcut and optionally registers it
+    explicit QHotkey(const NativeShortcut &shortcut, bool autoRegister = false, QObject *parent = 0);
+    //! Destructor
+    ~QHotkey();
+
+    //! READ-Accessor for QHotkey::registered
+    bool isRegistered() const;
+    //! READ-Accessor for QHotkey::shortcut - the key and modifiers as a QKeySequence
+    QKeySequence shortcut() const;
+    //! READ-Accessor for QHotkey::shortcut - the key only
+    Qt::Key keyCode() const;
+    //! READ-Accessor for QHotkey::shortcut - the modifiers only
+    Qt::KeyboardModifiers modifiers() const;
+
+    //! Get the current native shortcut
+    NativeShortcut currentNativeShortcut() const;
+
+public slots:
+    //! WRITE-Accessor for QHotkey::registered
+    bool setRegistered(bool registered);
+
+    //! WRITE-Accessor for QHotkey::shortcut
+    bool setShortcut(const QKeySequence &shortcut, bool autoRegister = false);
+    //! WRITE-Accessor for QHotkey::shortcut
+    bool setShortcut(Qt::Key keyCode, Qt::KeyboardModifiers modifiers, bool autoRegister = false);
+    //! RESET-Accessor for QHotkey::shortcut
+    bool resetShortcut();
+
+    //! Set this hotkey to a native shortcut
+    bool setNativeShortcut(NativeShortcut nativeShortcut, bool autoRegister = false);
+
+signals:
+    //! Will be emitted if the shortcut is pressed
+    void activated();
+
+    //! NOTIFY-Accessor for QHotkey::registered
+    void registeredChanged(bool registered);
+
+private:
+    Qt::Key _keyCode;
+    Qt::KeyboardModifiers _modifiers;
+
+    NativeShortcut _nativeShortcut;
+    bool _registered;
+};
+
+uint QHOTKEY_SHARED_EXPORT qHash(const QHotkey::NativeShortcut &key);
+uint QHOTKEY_SHARED_EXPORT qHash(const QHotkey::NativeShortcut &key, uint seed);
+
+#endif // QHOTKEY_H

3rd_qhotkey/qhotkey_mac.cpp

@@ -0,0 +1,268 @@
+#include "qhotkey.h"
+#include "qhotkey_p.h"
+#include <Carbon/Carbon.h>
+#include <QDebug>
+
+class QHotkeyPrivateMac : public QHotkeyPrivate
+{
+public:
+    // QAbstractNativeEventFilter interface
+    bool nativeEventFilter(const QByteArray &eventType, void *message, long *result) Q_DECL_OVERRIDE;
+
+    static OSStatus hotkeyEventHandler(EventHandlerCallRef nextHandler, EventRef event, void *data);
+
+protected:
+    // QHotkeyPrivate interface
+    quint32 nativeKeycode(Qt::Key keycode, bool &ok) Q_DECL_OVERRIDE;
+    quint32 nativeModifiers(Qt::KeyboardModifiers modifiers, bool &ok) Q_DECL_OVERRIDE;
+    bool registerShortcut(QHotkey::NativeShortcut shortcut) Q_DECL_OVERRIDE;
+    bool unregisterShortcut(QHotkey::NativeShortcut shortcut) Q_DECL_OVERRIDE;
+
+private:
+    static bool isHotkeyHandlerRegistered;
+    static QHash<QHotkey::NativeShortcut, EventHotKeyRef> hotkeyRefs;
+};
+NATIVE_INSTANCE(QHotkeyPrivateMac)
+
+bool QHotkeyPrivateMac::isHotkeyHandlerRegistered = false;
+QHash<QHotkey::NativeShortcut, EventHotKeyRef> QHotkeyPrivateMac::hotkeyRefs;
+
+bool QHotkeyPrivateMac::nativeEventFilter(const QByteArray &eventType, void *message, long *result)
+{
+    Q_UNUSED(eventType);
+    Q_UNUSED(message);
+    Q_UNUSED(result);
+    return false;
+}
+
+quint32 QHotkeyPrivateMac::nativeKeycode(Qt::Key keycode, bool &ok)
+{
+    // Constants found in NSEvent.h from AppKit.framework
+    ok = true;
+    switch (keycode) {
+        case Qt::Key_Return:
+            return kVK_Return;
+        case Qt::Key_Enter:
+            return kVK_ANSI_KeypadEnter;
+        case Qt::Key_Tab:
+            return kVK_Tab;
+        case Qt::Key_Space:
+            return kVK_Space;
+        case Qt::Key_Backspace:
+            return kVK_Delete;
+        case Qt::Key_Escape:
+            return kVK_Escape;
+        case Qt::Key_CapsLock:
+            return kVK_CapsLock;
+        case Qt::Key_Option:
+            return kVK_Option;
+        case Qt::Key_F17:
+            return kVK_F17;
+        case Qt::Key_VolumeUp:
+            return kVK_VolumeUp;
+        case Qt::Key_VolumeDown:
+            return kVK_VolumeDown;
+        case Qt::Key_F18:
+            return kVK_F18;
+        case Qt::Key_F19:
+            return kVK_F19;
+        case Qt::Key_F20:
+            return kVK_F20;
+        case Qt::Key_F5:
+            return kVK_F5;
+        case Qt::Key_F6:
+            return kVK_F6;
+        case Qt::Key_F7:
+            return kVK_F7;
+        case Qt::Key_F3:
+            return kVK_F3;
+        case Qt::Key_F8:
+            return kVK_F8;
+        case Qt::Key_F9:
+            return kVK_F9;
+        case Qt::Key_F11:
+            return kVK_F11;
+        case Qt::Key_F13:
+            return kVK_F13;
+        case Qt::Key_F16:
+            return kVK_F16;
+        case Qt::Key_F14:
+            return kVK_F14;
+        case Qt::Key_F10:
+            return kVK_F10;
+        case Qt::Key_F12:
+            return kVK_F12;
+        case Qt::Key_F15:
+            return kVK_F15;
+        case Qt::Key_Help:
+            return kVK_Help;
+        case Qt::Key_Home:
+            return kVK_Home;
+        case Qt::Key_PageUp:
+            return kVK_PageUp;
+        case Qt::Key_Delete:
+            return kVK_ForwardDelete;
+        case Qt::Key_F4:
+            return kVK_F4;
+        case Qt::Key_End:
+            return kVK_End;
+        case Qt::Key_F2:
+            return kVK_F2;
+        case Qt::Key_PageDown:
+            return kVK_PageDown;
+        case Qt::Key_F1:
+            return kVK_F1;
+        case Qt::Key_Left:
+            return kVK_LeftArrow;
+        case Qt::Key_Right:
+            return kVK_RightArrow;
+        case Qt::Key_Down:
+            return kVK_DownArrow;
+        case Qt::Key_Up:
+            return kVK_UpArrow;
+        default:
+            ok = false;
+            break;
+    }
+
+    UTF16Char ch = keycode;
+
+    CFDataRef currentLayoutData;
+    TISInputSourceRef currentKeyboard = TISCopyCurrentKeyboardInputSource();
+
+    if (currentKeyboard == NULL) {
+        return 0;
+    }
+
+    currentLayoutData = (CFDataRef)TISGetInputSourceProperty(currentKeyboard, kTISPropertyUnicodeKeyLayoutData);
+    CFRelease(currentKeyboard);
+    if (currentLayoutData == NULL) {
+        return 0;
+    }
+
+    UCKeyboardLayout *header = (UCKeyboardLayout *)CFDataGetBytePtr(currentLayoutData);
+    UCKeyboardTypeHeader *table = header->keyboardTypeList;
+
+    uint8_t *data = (uint8_t *)header;
+    for (quint32 i = 0; i < header->keyboardTypeCount; i++) {
+        UCKeyStateRecordsIndex *stateRec = 0;
+        if (table[i].keyStateRecordsIndexOffset != 0) {
+            stateRec = reinterpret_cast<UCKeyStateRecordsIndex *>(data + table[i].keyStateRecordsIndexOffset);
+            if (stateRec->keyStateRecordsIndexFormat != kUCKeyStateRecordsIndexFormat) {
+                stateRec = 0;
+            }
+        }
+
+        UCKeyToCharTableIndex *charTable = reinterpret_cast<UCKeyToCharTableIndex *>(data + table[i].keyToCharTableIndexOffset);
+        if (charTable->keyToCharTableIndexFormat != kUCKeyToCharTableIndexFormat) {
+            continue;
+        }
+
+        for (quint32 j = 0; j < charTable->keyToCharTableCount; j++) {
+            UCKeyOutput *keyToChar = reinterpret_cast<UCKeyOutput *>(data + charTable->keyToCharTableOffsets[j]);
+            for (quint32 k = 0; k < charTable->keyToCharTableSize; k++) {
+                if (keyToChar[k] & kUCKeyOutputTestForIndexMask) {
+                    long idx = keyToChar[k] & kUCKeyOutputGetIndexMask;
+                    if (stateRec && idx < stateRec->keyStateRecordCount) {
+                        UCKeyStateRecord *rec = reinterpret_cast<UCKeyStateRecord *>(data + stateRec->keyStateRecordOffsets[idx]);
+                        if (rec->stateZeroCharData == ch) {
+                            ok = true;
+                            return k;
+                        }
+                    }
+                } else if (!(keyToChar[k] & kUCKeyOutputSequenceIndexMask) && keyToChar[k] < 0xFFFE) {
+                    if (keyToChar[k] == ch) {
+                        ok = true;
+                        return k;
+                    }
+                }
+            }
+        }
+    }
+    return 0;
+}
+
+quint32 QHotkeyPrivateMac::nativeModifiers(Qt::KeyboardModifiers modifiers, bool &ok)
+{
+    quint32 nMods = 0;
+    if (modifiers & Qt::ShiftModifier) {
+        nMods |= shiftKey;
+    }
+    if (modifiers & Qt::ControlModifier) {
+        nMods |= cmdKey;
+    }
+    if (modifiers & Qt::AltModifier) {
+        nMods |= optionKey;
+    }
+    if (modifiers & Qt::MetaModifier) {
+        nMods |= controlKey;
+    }
+    if (modifiers & Qt::KeypadModifier) {
+        nMods |= kEventKeyModifierNumLockMask;
+    }
+    ok = true;
+    return nMods;
+}
+
+bool QHotkeyPrivateMac::registerShortcut(QHotkey::NativeShortcut shortcut)
+{
+    if (!this->isHotkeyHandlerRegistered) {
+        EventTypeSpec eventSpec;
+        eventSpec.eventClass = kEventClassKeyboard;
+        eventSpec.eventKind = kEventHotKeyPressed;
+        InstallApplicationEventHandler(&QHotkeyPrivateMac::hotkeyEventHandler, 1, &eventSpec, NULL, NULL);
+    }
+
+    EventHotKeyID hkeyID;
+    hkeyID.signature = shortcut.key;
+    hkeyID.id = shortcut.modifier;
+
+    EventHotKeyRef eventRef = 0;
+    OSStatus status = RegisterEventHotKey(shortcut.key,
+                                          shortcut.modifier,
+                                          hkeyID,
+                                          GetApplicationEventTarget(),
+                                          0,
+                                          &eventRef);
+    if (status != noErr) {
+        qDebug() << "Failed to register hotkey. Error:" << status;
+        return false;
+    } else {
+        this->hotkeyRefs.insert(shortcut, eventRef);
+        return true;
+    }
+}
+
+bool QHotkeyPrivateMac::unregisterShortcut(QHotkey::NativeShortcut shortcut)
+{
+    EventHotKeyRef eventRef = QHotkeyPrivateMac::hotkeyRefs.value(shortcut);
+    OSStatus status = UnregisterEventHotKey(eventRef);
+    if (status != noErr) {
+        qDebug() << "Failed to unregister hotkey. Error:" << status;
+        return false;
+    } else {
+        this->hotkeyRefs.remove(shortcut);
+        return true;
+    }
+}
+
+OSStatus QHotkeyPrivateMac::hotkeyEventHandler(EventHandlerCallRef nextHandler, EventRef event, void *data)
+{
+    Q_UNUSED(nextHandler);
+    Q_UNUSED(data);
+
+    if (GetEventClass(event) == kEventClassKeyboard &&
+        GetEventKind(event) == kEventHotKeyPressed) {
+        EventHotKeyID hkeyID;
+        GetEventParameter(event,
+                          kEventParamDirectObject,
+                          typeEventHotKeyID,
+                          NULL,
+                          sizeof(EventHotKeyID),
+                          NULL,
+                          &hkeyID);
+        hotkeyPrivate->activateShortcut(QHotkey::NativeShortcut(hkeyID.signature, hkeyID.id));
+    }
+
+    return noErr;
+}

3rd_qhotkey/qhotkey_p.h

@@ -0,0 +1,49 @@
+#ifndef QHOTKEY_P_H
+#define QHOTKEY_P_H
+
+#include "qhotkey.h"
+#include <QAbstractNativeEventFilter>
+#include <QMultiHash>
+#include <QMutex>
+#include <QGlobalStatic>
+
+class QHOTKEY_SHARED_EXPORT QHotkeyPrivate : public QObject, public QAbstractNativeEventFilter
+{
+    Q_OBJECT
+
+public: QHotkeyPrivate();//singleton!!!
+    ~QHotkeyPrivate();
+
+    static QHotkeyPrivate *instance();
+
+    QHotkey::NativeShortcut nativeShortcut(Qt::Key keycode, Qt::KeyboardModifiers modifiers);
+
+    bool addShortcut(QHotkey *hotkey);
+    bool removeShortcut(QHotkey *hotkey);
+
+protected:
+    void activateShortcut(QHotkey::NativeShortcut shortcut);
+
+    virtual quint32 nativeKeycode(Qt::Key keycode, bool &ok) = 0;//platform implement
+    virtual quint32 nativeModifiers(Qt::KeyboardModifiers modifiers, bool &ok) = 0;//platform implement
+
+    virtual bool registerShortcut(QHotkey::NativeShortcut shortcut) = 0;//platform implement
+    virtual bool unregisterShortcut(QHotkey::NativeShortcut shortcut) = 0;//platform implement
+
+private:
+    QMultiHash<QHotkey::NativeShortcut, QHotkey *> shortcuts;
+
+    Q_INVOKABLE bool addShortcutInvoked(QHotkey *hotkey);
+    Q_INVOKABLE bool removeShortcutInvoked(QHotkey *hotkey);
+    Q_INVOKABLE QHotkey::NativeShortcut nativeShortcutInvoked(Qt::Key keycode, Qt::KeyboardModifiers modifiers);
+};
+
+#define NATIVE_INSTANCE(ClassName) \
+	Q_GLOBAL_STATIC(ClassName, hotkeyPrivate) \
+	\
+	QHotkeyPrivate *QHotkeyPrivate::instance()\
+	{\
+		return hotkeyPrivate;\
+	}
+
+#endif // QHOTKEY_P_H

3rd_qhotkey/qhotkey_win.cpp

@@ -0,0 +1,274 @@
+#include "qhotkey.h"
+#include "qhotkey_p.h"
+#include <qt_windows.h>
+#include <QDebug>
+
+#define HKEY_ID(nativeShortcut) (((nativeShortcut.key ^ (nativeShortcut.modifier << 8)) & 0x0FFF) | 0x7000)
+
+class QHotkeyPrivateWin : public QHotkeyPrivate
+{
+public:
+    // QAbstractNativeEventFilter interface
+    bool nativeEventFilter(const QByteArray &eventType, void *message, long *result) Q_DECL_OVERRIDE;
+
+protected:
+    // QHotkeyPrivate interface
+    quint32 nativeKeycode(Qt::Key keycode, bool &ok) Q_DECL_OVERRIDE;
+    quint32 nativeModifiers(Qt::KeyboardModifiers modifiers, bool &ok) Q_DECL_OVERRIDE;
+    bool registerShortcut(QHotkey::NativeShortcut shortcut) Q_DECL_OVERRIDE;
+    bool unregisterShortcut(QHotkey::NativeShortcut shortcut) Q_DECL_OVERRIDE;
+
+private:
+    static QString formatWinError(DWORD winError);
+};
+NATIVE_INSTANCE(QHotkeyPrivateWin)
+
+bool QHotkeyPrivateWin::nativeEventFilter(const QByteArray &eventType, void *message, long *result)
+{
+    Q_UNUSED(eventType);
+    Q_UNUSED(result);
+
+    MSG *msg = static_cast<MSG *>(message);
+    if (msg->message == WM_HOTKEY) {
+        this->activateShortcut(QHotkey::NativeShortcut(HIWORD(msg->lParam), LOWORD(msg->lParam)));
+    }
+
+    return false;
+}
+
+quint32 QHotkeyPrivateWin::nativeKeycode(Qt::Key keycode, bool &ok)
+{
+    ok = true;
+    if (keycode <= 0xFFFF) { //Try to obtain the key from it's "character"
+        const SHORT vKey = VkKeyScanW(keycode);
+        if (vKey > -1) {
+            return LOBYTE(vKey);
+        }
+    }
+
+    //find key from switch/case --> Only finds a very small subset of keys
+    switch (keycode) {
+        case Qt::Key_Escape:
+            return VK_ESCAPE;
+        case Qt::Key_Tab:
+        case Qt::Key_Backtab:
+            return VK_TAB;
+        case Qt::Key_Backspace:
+            return VK_BACK;
+        case Qt::Key_Return:
+        case Qt::Key_Enter:
+            return VK_RETURN;
+        case Qt::Key_Insert:
+            return VK_INSERT;
+        case Qt::Key_Delete:
+            return VK_DELETE;
+        case Qt::Key_Pause:
+            return VK_PAUSE;
+        case Qt::Key_Print:
+            return VK_PRINT;
+        case Qt::Key_Clear:
+            return VK_CLEAR;
+        case Qt::Key_Home:
+            return VK_HOME;
+        case Qt::Key_End:
+            return VK_END;
+        case Qt::Key_Left:
+            return VK_LEFT;
+        case Qt::Key_Up:
+            return VK_UP;
+        case Qt::Key_Right:
+            return VK_RIGHT;
+        case Qt::Key_Down:
+            return VK_DOWN;
+        case Qt::Key_PageUp:
+            return VK_PRIOR;
+        case Qt::Key_PageDown:
+            return VK_NEXT;
+        case Qt::Key_CapsLock:
+            return VK_CAPITAL;
+        case Qt::Key_NumLock:
+            return VK_NUMLOCK;
+        case Qt::Key_ScrollLock:
+            return VK_SCROLL;
+
+        case Qt::Key_F1:
+            return VK_F1;
+        case Qt::Key_F2:
+            return VK_F2;
+        case Qt::Key_F3:
+            return VK_F3;
+        case Qt::Key_F4:
+            return VK_F4;
+        case Qt::Key_F5:
+            return VK_F5;
+        case Qt::Key_F6:
+            return VK_F6;
+        case Qt::Key_F7:
+            return VK_F7;
+        case Qt::Key_F8:
+            return VK_F8;
+        case Qt::Key_F9:
+            return VK_F9;
+        case Qt::Key_F10:
+            return VK_F10;
+        case Qt::Key_F11:
+            return VK_F11;
+        case Qt::Key_F12:
+            return VK_F12;
+        case Qt::Key_F13:
+            return VK_F13;
+        case Qt::Key_F14:
+            return VK_F14;
+        case Qt::Key_F15:
+            return VK_F15;
+        case Qt::Key_F16:
+            return VK_F16;
+        case Qt::Key_F17:
+            return VK_F17;
+        case Qt::Key_F18:
+            return VK_F18;
+        case Qt::Key_F19:
+            return VK_F19;
+        case Qt::Key_F20:
+            return VK_F20;
+        case Qt::Key_F21:
+            return VK_F21;
+        case Qt::Key_F22:
+            return VK_F22;
+        case Qt::Key_F23:
+            return VK_F23;
+        case Qt::Key_F24:
+            return VK_F24;
+
+        case Qt::Key_Menu:
+            return VK_APPS;
+        case Qt::Key_Help:
+            return VK_HELP;
+        case Qt::Key_MediaNext:
+            return VK_MEDIA_NEXT_TRACK;
+        case Qt::Key_MediaPrevious:
+            return VK_MEDIA_PREV_TRACK;
+        case Qt::Key_MediaPlay:
+            return VK_MEDIA_PLAY_PAUSE;
+        case Qt::Key_MediaStop:
+            return VK_MEDIA_STOP;
+        case Qt::Key_VolumeDown:
+            return VK_VOLUME_DOWN;
+        case Qt::Key_VolumeUp:
+            return VK_VOLUME_UP;
+        case Qt::Key_VolumeMute:
+            return VK_VOLUME_MUTE;
+        case Qt::Key_Mode_switch:
+            return VK_MODECHANGE;
+        case Qt::Key_Select:
+            return VK_SELECT;
+        case Qt::Key_Printer:
+            return VK_PRINT;
+        case Qt::Key_Execute:
+            return VK_EXECUTE;
+        case Qt::Key_Sleep:
+            return VK_SLEEP;
+        case Qt::Key_Period:
+            return VK_DECIMAL;
+        case Qt::Key_Play:
+            return VK_PLAY;
+        case Qt::Key_Cancel:
+            return VK_CANCEL;
+
+        case Qt::Key_Forward:
+            return VK_BROWSER_FORWARD;
+        case Qt::Key_Refresh:
+            return VK_BROWSER_REFRESH;
+        case Qt::Key_Stop:
+            return VK_BROWSER_STOP;
+        case Qt::Key_Search:
+            return VK_BROWSER_SEARCH;
+        case Qt::Key_Favorites:
+            return VK_BROWSER_FAVORITES;
+        case Qt::Key_HomePage:
+            return VK_BROWSER_HOME;
+
+        case Qt::Key_LaunchMail:
+            return VK_LAUNCH_MAIL;
+        case Qt::Key_LaunchMedia:
+            return VK_LAUNCH_MEDIA_SELECT;
+        case Qt::Key_Launch0:
+            return VK_LAUNCH_APP1;
+        case Qt::Key_Launch1:
+            return VK_LAUNCH_APP2;
+
+        case Qt::Key_Massyo:
+            return VK_OEM_FJ_MASSHOU;
+        case Qt::Key_Touroku:
+            return VK_OEM_FJ_TOUROKU;
+
+        default:
+            ok = false;
+            return 0;
+    }
+}
+
+quint32 QHotkeyPrivateWin::nativeModifiers(Qt::KeyboardModifiers modifiers, bool &ok)
+{
+    quint32 nMods = 0;
+    if (modifiers & Qt::ShiftModifier) {
+        nMods |= MOD_SHIFT;
+    }
+    if (modifiers & Qt::ControlModifier) {
+        nMods |= MOD_CONTROL;
+    }
+    if (modifiers & Qt::AltModifier) {
+        nMods |= MOD_ALT;
+    }
+    if (modifiers & Qt::MetaModifier) {
+        nMods |= MOD_WIN;
+    }
+    ok = true;
+    return nMods;
+}
+
+bool QHotkeyPrivateWin::registerShortcut(QHotkey::NativeShortcut shortcut)
+{
+    BOOL ok = RegisterHotKey(NULL,
+                             HKEY_ID(shortcut),
+                             shortcut.modifier,
+                             shortcut.key);
+    if (ok) {
+        return true;
+    } else {
+        qDebug() << "Failed to register hotkey. Error:"
+                 << qPrintable(QHotkeyPrivateWin::formatWinError(::GetLastError()));
+        return false;
+    }
+}
+
+bool QHotkeyPrivateWin::unregisterShortcut(QHotkey::NativeShortcut shortcut)
+{
+    BOOL ok = UnregisterHotKey(NULL, HKEY_ID(shortcut));
+    if (ok) {
+        return true;
+    } else {
+        qDebug() << "Failed to unregister hotkey. Error:"
+                 << qPrintable(QHotkeyPrivateWin::formatWinError(::GetLastError()));
+        return false;
+    }
+}
+
+QString QHotkeyPrivateWin::formatWinError(DWORD winError)
+{
+    wchar_t *buffer = NULL;
+    DWORD num = FormatMessageW(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
+                               NULL,
+                               winError,
+                               0,
+                               (LPWSTR)&buffer,
+                               0,
+                               NULL);
+    if (buffer) {
+        QString res = QString::fromWCharArray(buffer, num);
+        LocalFree(buffer);
+        return res;
+    } else {
+        return QString();
+    }
+}

3rd_qhotkey/qhotkey_x11.cpp

@@ -0,0 +1,201 @@
+#include "qhotkey.h"
+#include "qhotkey_p.h"
+#include <QDebug>
+#include <QX11Info>
+#include <QThreadStorage>
+#include <X11/Xlib.h>
+#include <xcb/xcb.h>
+
+class QHotkeyPrivateX11 : public QHotkeyPrivate
+{
+public:
+    // QAbstractNativeEventFilter interface
+    bool nativeEventFilter(const QByteArray &eventType, void *message, long *result) Q_DECL_OVERRIDE;
+
+protected:
+    // QHotkeyPrivate interface
+    quint32 nativeKeycode(Qt::Key keycode, bool &ok) Q_DECL_OVERRIDE;
+    quint32 nativeModifiers(Qt::KeyboardModifiers modifiers, bool &ok) Q_DECL_OVERRIDE;
+    bool registerShortcut(QHotkey::NativeShortcut shortcut) Q_DECL_OVERRIDE;
+    bool unregisterShortcut(QHotkey::NativeShortcut shortcut) Q_DECL_OVERRIDE;
+
+private:
+    static const QVector<quint32> specialModifiers;
+    static const quint32 validModsMask;
+
+    static QString formatX11Error(Display *display, int errorCode);
+
+    class HotkeyErrorHandler
+    {
+    public:
+        HotkeyErrorHandler();
+        ~HotkeyErrorHandler();
+
+        static bool hasError;
+        static QString errorString;
+
+    private:
+        XErrorHandler prevHandler;
+
+        static int handleError(Display *display, XErrorEvent *error);
+    };
+};
+NATIVE_INSTANCE(QHotkeyPrivateX11)
+
+const QVector<quint32> QHotkeyPrivateX11::specialModifiers = {0, Mod2Mask, LockMask, (Mod2Mask | LockMask)};
+const quint32 QHotkeyPrivateX11::validModsMask = ShiftMask | ControlMask | Mod1Mask | Mod4Mask;
+
+bool QHotkeyPrivateX11::nativeEventFilter(const QByteArray &eventType, void *message, long *result)
+{
+    Q_UNUSED(eventType);
+    Q_UNUSED(result);
+
+    xcb_generic_event_t *genericEvent = static_cast<xcb_generic_event_t *>(message);
+    if (genericEvent->response_type == XCB_KEY_PRESS) {
+        xcb_key_press_event_t *keyEvent = static_cast<xcb_key_press_event_t *>(message);
+        this->activateShortcut(QHotkey::NativeShortcut(keyEvent->detail, keyEvent->state & QHotkeyPrivateX11::validModsMask));
+    }
+
+    return false;
+}
+
+quint32 QHotkeyPrivateX11::nativeKeycode(Qt::Key keycode, bool &ok)
+{
+    KeySym keysym = XStringToKeysym(QKeySequence(keycode).toString(QKeySequence::NativeText).toLatin1().constData());
+    if (keysym == NoSymbol) {
+        //not found -> just use the key
+        if (keycode <= 0xFFFF) {
+            keysym = keycode;
+        } else {
+            return 0;
+        }
+    }
+
+    Display *display = QX11Info::display();
+    if (display) {
+        auto res = XKeysymToKeycode(QX11Info::display(), keysym);
+        if (res != 0) {
+            ok = true;
+        }
+        return res;
+    } else {
+        return 0;
+    }
+}
+
+quint32 QHotkeyPrivateX11::nativeModifiers(Qt::KeyboardModifiers modifiers, bool &ok)
+{
+    quint32 nMods = 0;
+    if (modifiers & Qt::ShiftModifier) {
+        nMods |= ShiftMask;
+    }
+    if (modifiers & Qt::ControlModifier) {
+        nMods |= ControlMask;
+    }
+    if (modifiers & Qt::AltModifier) {
+        nMods |= Mod1Mask;
+    }
+    if (modifiers & Qt::MetaModifier) {
+        nMods |= Mod4Mask;
+    }
+    ok = true;
+    return nMods;
+}
+
+bool QHotkeyPrivateX11::registerShortcut(QHotkey::NativeShortcut shortcut)
+{
+    Display *display = QX11Info::display();
+    if (!display) {
+        return false;
+    }
+
+    HotkeyErrorHandler errorHandler;
+    foreach (quint32 specialMod, QHotkeyPrivateX11::specialModifiers) {
+        XGrabKey(display,
+                 shortcut.key,
+                 shortcut.modifier | specialMod,
+                 DefaultRootWindow(display),
+                 True,
+                 GrabModeAsync,
+                 GrabModeAsync);
+    }
+    XSync(display, False);
+
+    if (errorHandler.hasError) {
+        qDebug() << "Failed to register hotkey. Error:" << qPrintable(errorHandler.errorString);
+        this->unregisterShortcut(shortcut);
+        return false;
+    } else {
+        return true;
+    }
+}
+
+bool QHotkeyPrivateX11::unregisterShortcut(QHotkey::NativeShortcut shortcut)
+{
+    Display *display = QX11Info::display();
+    if (!display) {
+        return false;
+    }
+
+    HotkeyErrorHandler errorHandler;
+    foreach (quint32 specialMod, QHotkeyPrivateX11::specialModifiers) {
+        XUngrabKey(display,
+                   shortcut.key,
+                   shortcut.modifier | specialMod,
+                   DefaultRootWindow(display));
+    }
+    XSync(display, False);
+
+    if (errorHandler.hasError) {
+        qDebug() << "Failed to unregister hotkey. Error:" << qPrintable(errorHandler.errorString);
+        return false;
+    } else {
+        return true;
+    }
+}
+
+QString QHotkeyPrivateX11::formatX11Error(Display *display, int errorCode)
+{
+    char errStr[256];
+    XGetErrorText(display, errorCode, errStr, 256);
+    return QString::fromLatin1(errStr);
+}
+
+
+
+// ---------- QHotkeyPrivateX11::HotkeyErrorHandler implementation ----------
+
+bool QHotkeyPrivateX11::HotkeyErrorHandler::hasError = false;
+QString QHotkeyPrivateX11::HotkeyErrorHandler::errorString;
+
+QHotkeyPrivateX11::HotkeyErrorHandler::HotkeyErrorHandler()
+{
+    prevHandler = XSetErrorHandler(&HotkeyErrorHandler::handleError);
+}
+
+QHotkeyPrivateX11::HotkeyErrorHandler::~HotkeyErrorHandler()
+{
+    XSetErrorHandler(prevHandler);
+    hasError = false;
+    errorString.clear();
+}
+
+int QHotkeyPrivateX11::HotkeyErrorHandler::handleError(Display *display, XErrorEvent *error)
+{
+    QT_WARNING_PUSH
+    QT_WARNING_DISABLE_GCC("-Wimplicit-fallthrough")
+    switch (error->error_code) {
+        case BadAccess:
+        case BadValue:
+        case BadWindow:
+            if (error->request_code == 33 || //grab key
+                error->request_code == 34) {// ungrab key
+                hasError = true;
+                errorString = QHotkeyPrivateX11::formatX11Error(display, error->error_code);
+                return 1;
+            }
+        default:
+            return 0;
+    }
+    QT_WARNING_POP
+}