src/qt/src/kernel/qaccessible.h

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/****************************************************************************
** $Id: qt/qaccessible.h   3.3.8   edited Jan 11 14:46 $
**
** Definition of QAccessible and QAccessibleObject classes
**
** Copyright (C) 2000-2007 Trolltech ASA.  All rights reserved.
**
** This file is part of the kernel module of the Qt GUI Toolkit.
**
** This file may be distributed under the terms of the Q Public License
** as defined by Trolltech ASA of Norway and appearing in the file
** LICENSE.QPL included in the packaging of this file.
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
**
** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
** licenses may use this file in accordance with the Qt Commercial License
** Agreement provided with the Software.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
**   information about Qt Commercial License Agreements.
** See http://www.trolltech.com/qpl/ for QPL licensing information.
** See http://www.trolltech.com/gpl/ for GPL licensing information.
**
** Contact info@trolltech.com if any conditions of this licensing are
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**********************************************************************/

#ifndef QACCESSIBLE_H
#define QACCESSIBLE_H

#ifndef QT_H
#include "qobject.h"
#include <private/qcom_p.h>
#include "qrect.h"
#include "qguardedptr.h"
#include "qmemarray.h"
#endif // QT_H

#if defined(QT_ACCESSIBILITY_SUPPORT)

struct QAccessibleInterface;

class Q_EXPORT QAccessible
{
private:
#ifdef Q_WS_MAC
    static QMAC_PASCAL OSStatus globalEventProcessor(EventHandlerCallRef,  EventRef, void *);
    static QObject *queryAccessibleObject(QAccessibleInterface *);
#endif
public:
    enum Event {
        SoundPlayed         = 0x0001,
        Alert               = 0x0002,
        ForegroundChanged   = 0x0003,
        MenuStart           = 0x0004,
        MenuEnd             = 0x0005,
        PopupMenuStart      = 0x0006,
        PopupMenuEnd        = 0x0007,
        ContextHelpStart    = 0x000C,
        ContextHelpEnd      = 0x000D,
        DragDropStart       = 0x000E,
        DragDropEnd         = 0x000F,
        DialogStart         = 0x0010,
        DialogEnd           = 0x0011,
        ScrollingStart      = 0x0012,
        ScrollingEnd        = 0x0013,

        MenuCommand         = 0x0018,

        ObjectCreated       = 0x8000,
        ObjectDestroyed     = 0x8001,
        ObjectShow          = 0x8002,
        ObjectHide          = 0x8003,
        ObjectReorder       = 0x8004,
        Focus               = 0x8005,
        Selection           = 0x8006,
        SelectionAdd        = 0x8007,
        SelectionRemove     = 0x8008,
        SelectionWithin     = 0x8009,
        StateChanged        = 0x800A,
        LocationChanged     = 0x800B,
        NameChanged         = 0x800C,
        DescriptionChanged  = 0x800D,
        ValueChanged        = 0x800E,
        ParentChanged       = 0x800F,
        HelpChanged         = 0x80A0,
        DefaultActionChanged= 0x80B0,
        AcceleratorChanged  = 0x80C0
    };

    enum State {
        Normal          = 0x00000000,
        Unavailable     = 0x00000001,
        Selected        = 0x00000002,
        Focused         = 0x00000004,
        Pressed         = 0x00000008,
        Checked         = 0x00000010,
        Mixed           = 0x00000020,
        ReadOnly        = 0x00000040,
        HotTracked      = 0x00000080,
        Default         = 0x00000100,
        Expanded        = 0x00000200,
        Collapsed       = 0x00000400,
        Busy            = 0x00000800,
        Floating        = 0x00001000,
        Marqueed        = 0x00002000,
        Animated        = 0x00004000,
        Invisible       = 0x00008000,
        Offscreen       = 0x00010000,
        Sizeable        = 0x00020000,
        Moveable        = 0x00040000,
        SelfVoicing     = 0x00080000,
        Focusable       = 0x00100000,
        Selectable      = 0x00200000,
        Linked          = 0x00400000,
        Traversed       = 0x00800000,
        MultiSelectable = 0x01000000,
        ExtSelectable   = 0x02000000,
        AlertLow        = 0x04000000,
        AlertMedium     = 0x08000000,
        AlertHigh       = 0x10000000,
        Protected       = 0x20000000,
        Valid           = 0x3fffffff
    };

    enum Role {
        NoRole          = 0x00000000,
        TitleBar        = 0x00000001,
        MenuBar         = 0x00000002,
        ScrollBar       = 0x00000003,
        Grip            = 0x00000004,
        Sound           = 0x00000005,
        Cursor          = 0x00000006,
        Caret           = 0x00000007,
        AlertMessage    = 0x00000008,
        Window          = 0x00000009,
        Client          = 0x0000000A,
        PopupMenu       = 0x0000000B,
        MenuItem        = 0x0000000C,
        ToolTip         = 0x0000000D,
        Application     = 0x0000000E,
        Document        = 0x0000000F,
        Pane            = 0x00000010,
        Chart           = 0x00000011,
        Dialog          = 0x00000012,
        Border          = 0x00000013,
        Grouping        = 0x00000014,
        Separator       = 0x00000015,
        ToolBar         = 0x00000016,
        StatusBar       = 0x00000017,
        Table           = 0x00000018,
        ColumnHeader    = 0x00000019,
        RowHeader       = 0x0000001A,
        Column          = 0x0000001B,
        Row             = 0x0000001C,
        Cell            = 0x0000001D,
        Link            = 0x0000001E,
        HelpBalloon     = 0x0000001F,
        Character       = 0x00000020,
        List            = 0x00000021,
        ListItem        = 0x00000022,
        Outline         = 0x00000023,
        OutlineItem     = 0x00000024,
        PageTab         = 0x00000025,
        PropertyPage    = 0x00000026,
        Indicator       = 0x00000027,
        Graphic         = 0x00000028,
        StaticText      = 0x00000029,
        EditableText    = 0x0000002A,  // Editable, selectable, etc.
        PushButton      = 0x0000002B,
        CheckBox        = 0x0000002C,
        RadioButton     = 0x0000002D,
        ComboBox        = 0x0000002E,
        DropLest        = 0x0000002F,
        ProgressBar     = 0x00000030,
        Dial            = 0x00000031,
        HotkeyField     = 0x00000032,
        Slider          = 0x00000033,
        SpinBox         = 0x00000034,
        Diagram         = 0x00000035,
        Animation       = 0x00000036,
        Equation        = 0x00000037,
        ButtonDropDown  = 0x00000038,
        ButtonMenu      = 0x00000039,
        ButtonDropGrid  = 0x0000003A,
        Whitespace      = 0x0000003B,
        PageTabList     = 0x0000003C,
        Clock           = 0x0000003D
    };

    enum NavDirection {
        NavUp           = 0x00000001,
        NavDown         = 0x00000002,
        NavLeft         = 0x00000003,
        NavRight        = 0x00000004,
        NavNext         = 0x00000005,
        NavPrevious     = 0x00000006,
        NavFirstChild   = 0x00000007,
        NavLastChild    = 0x00000008,
        NavFocusChild   = 0x00000009
    };

    enum Text {
        Name            = 0,
        Description,
        Value,
        Help,
        Accelerator,
        DefaultAction
    };

    static QRESULT queryAccessibleInterface( QObject *, QAccessibleInterface ** );
    static void updateAccessibility( QObject *, int who, Event reason );
    static bool isActive();

    static void initialize();
    static void cleanup();
};

// {EC86CB9C-5DA0-4c43-A739-13EBDF1C6B14}
#define IID_QAccessible QUuid( 0xec86cb9c, 0x5da0, 0x4c43, 0xa7, 0x39, 0x13, 0xeb, 0xdf, 0x1c, 0x6b, 0x14 )

struct Q_EXPORT QAccessibleInterface : public QAccessible, public QUnknownInterface
{
    // check for valid pointers
    virtual bool        isValid() const = 0;

    // hierarchy
    virtual int         childCount() const = 0;
    virtual QRESULT     queryChild( int control, QAccessibleInterface** ) const = 0;
    virtual QRESULT     queryParent( QAccessibleInterface** ) const = 0;

    // navigation
    virtual int         controlAt( int x, int y ) const = 0;
    virtual QRect       rect( int control ) const = 0;
    virtual int         navigate( NavDirection direction, int startControl ) const = 0;

    // properties and state
    virtual QString     text( Text t, int control ) const = 0;
    virtual void        setText( Text t, int control, const QString &text ) = 0;
    virtual Role        role( int control ) const = 0;
    virtual State       state( int control ) const = 0;
    virtual QMemArray<int> selection() const = 0;

    // methods
    virtual bool        doDefaultAction( int control ) = 0;
    virtual bool        setFocus( int control ) = 0;
    virtual bool        setSelected( int control, bool on, bool extend ) = 0;
    virtual void        clearSelection() = 0;    
};

// {49F4C6A7-412F-41DE-9E24-648843421FD3} 
#ifndef IID_QAccessibleFactory
#define IID_QAccessibleFactory QUuid( 0x49f4c6a7, 0x412f, 0x41de, 0x9e, 0x24, 0x64, 0x88, 0x43, 0x42, 0x1f, 0xd3 )
#endif

struct Q_EXPORT QAccessibleFactoryInterface : public QAccessible, public QFeatureListInterface
{
    virtual QRESULT createAccessibleInterface( const QString &, QObject *, QAccessibleInterface** ) = 0;
};

class Q_EXPORT QAccessibleObject : public QObject, public QAccessibleInterface
{
public:
    QAccessibleObject( QObject *object );
    virtual ~QAccessibleObject();

    QRESULT     queryInterface( const QUuid &, QUnknownInterface** );
    Q_REFCOUNT

    bool        isValid() const;

protected:
    QObject *object() const;

private:
    QGuardedPtr<QObject> object_;
};

#define Q_DEFINED_QACCESSIBLE_OBJECT
#include "qwinexport.h"
#endif //QT_ACCESSIBILITY_SUPPORT

#endif //QACCESSIBLE_H