HYL_OK3568_LINUX/app/forlinx/DWKeyboard/include/inputengine.h

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** This file is part of the Qt Virtual Keyboard module of the Qt Toolkit.
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#ifndef INPUTENGINE_H
#define INPUTENGINE_H

#include <QObject>
#include <QPointer>
#include "dwkeyboard_global.h"

namespace QtVirtualKeyboard {

class InputContext;
class SelectionListModel;
class AbstractInputMethod;
class InputEnginePrivate;
class Trace;

class DWKEYBOARDSHARED_EXPORT InputEngine : public QObject
{
    Q_OBJECT
    Q_DISABLE_COPY(InputEngine)
    Q_DECLARE_PRIVATE(InputEngine)
    Q_ENUMS(TextCase)
    Q_ENUMS(InputMode)
    Q_ENUMS(PatternRecognitionMode)
    Q_FLAGS(ReselectFlags)
    Q_PROPERTY(Qt::Key activeKey READ activeKey NOTIFY activeKeyChanged)
    Q_PROPERTY(Qt::Key previousKey READ previousKey NOTIFY previousKeyChanged)
    Q_PROPERTY(QtVirtualKeyboard::AbstractInputMethod *inputMethod READ inputMethod WRITE setInputMethod NOTIFY inputMethodChanged)
    Q_PROPERTY(QList<int> inputModes READ inputModes NOTIFY inputModesChanged)
    Q_PROPERTY(InputMode inputMode READ inputMode WRITE setInputMode NOTIFY inputModeChanged)
    Q_PROPERTY(QList<int> patternRecognitionModes READ patternRecognitionModes NOTIFY patternRecognitionModesChanged)
    Q_PROPERTY(QtVirtualKeyboard::SelectionListModel *wordCandidateListModel READ wordCandidateListModel NOTIFY wordCandidateListModelChanged)
    Q_PROPERTY(bool wordCandidateListVisibleHint READ wordCandidateListVisibleHint NOTIFY wordCandidateListVisibleHintChanged)

    explicit InputEngine(InputContext *parent = 0);

public:
    enum TextCase {
        Lower,
        Upper
    };
    enum InputMode {
        Latin,      // 英文[拉丁]
        Numeric,
        Dialable,
        Pinyin,     // 拼音
        Cangjie,    // 仓颉编码
        Zhuyin,
        Hangul,     // 韩语
        Hiragana,   // 平假名
        Katakana,   // 片假名
        FullwidthLatin
    };
    enum PatternRecognitionMode {
        PatternRecognitionDisabled,
        HandwritingRecoginition
    };
    enum ReselectFlag {
        WordBeforeCursor = 0x1,
        WordAfterCursor = 0x2,
        WordAtCursor = WordBeforeCursor | WordAfterCursor
    };
    Q_DECLARE_FLAGS(ReselectFlags, ReselectFlag)

public:
    ~InputEngine();

    Q_INVOKABLE bool virtualKeyPress(Qt::Key key, const QString &text, Qt::KeyboardModifiers modifiers, bool repeat);
    Q_INVOKABLE void virtualKeyCancel();
    Q_INVOKABLE bool virtualKeyRelease(Qt::Key key, const QString &text, Qt::KeyboardModifiers modifiers);
    Q_INVOKABLE bool virtualKeyClick(Qt::Key key, const QString &text, Qt::KeyboardModifiers modifiers);

    InputContext *inputContext() const;
    Qt::Key activeKey() const;
    Qt::Key previousKey() const;

    AbstractInputMethod *inputMethod() const;
    void setInputMethod(AbstractInputMethod *inputMethod);

    QList<int> inputModes() const;

    InputMode inputMode() const;
    void setInputMode(InputMode inputMode);

    SelectionListModel *wordCandidateListModel() const;
    bool wordCandidateListVisibleHint() const;

    QList<int> patternRecognitionModes() const;
    Q_INVOKABLE QtVirtualKeyboard::Trace *traceBegin(int traceId, QtVirtualKeyboard::InputEngine::PatternRecognitionMode patternRecognitionMode,
                                                     const QVariantMap &traceCaptureDeviceInfo, const QVariantMap &traceScreenInfo);
    Q_INVOKABLE bool traceEnd(QtVirtualKeyboard::Trace *trace);

    Q_INVOKABLE bool reselect(int cursorPosition, const ReselectFlags &reselectFlags);

signals:
    void virtualKeyClicked(Qt::Key key, const QString &text, Qt::KeyboardModifiers modifiers, bool isAutoRepeat);
    void activeKeyChanged(Qt::Key key);
    void previousKeyChanged(Qt::Key key);
    void inputMethodChanged();
    void inputMethodReset();
    void inputMethodUpdate();
    void inputModesChanged();
    void inputModeChanged();
    void patternRecognitionModesChanged();
    void wordCandidateListModelChanged();
    void wordCandidateListVisibleHintChanged();

private slots:
    void reset();
    void update();
    void shiftChanged();

protected:
    void timerEvent(QTimerEvent *timerEvent);

private:
    friend class InputContext;
};

} // namespace QtVirtualKeyboard

Q_DECLARE_METATYPE(QtVirtualKeyboard::InputEngine::TextCase)
Q_DECLARE_METATYPE(QtVirtualKeyboard::InputEngine::InputMode)
Q_DECLARE_OPERATORS_FOR_FLAGS(QtVirtualKeyboard::InputEngine::ReselectFlags)

#endif