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# qevent.h

This is the verbatim text of the qevent.h include file. It is provided only for illustration; the copyright remains with Trolltech.

    /****************************************************************************
    ** $Id: qt/src/kernel/qevent.h   2.3.10 $
    **
    ** Definition of event classes
    **
    ** Created : 931029
    **
    ** Copyright (C) 1992-2000 Trolltech AS.  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 AS 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.
    **
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    **   information about Qt Commercial License Agreements.
    ** See http://www.trolltech.com/qpl/ for QPL licensing information.
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    **********************************************************************/

    #ifndef QEVENT_H
    #define QEVENT_H

    #ifndef QT_H
    #include "qwindowdefs.h"
    #include "qregion.h"
    #include "qnamespace.h"
    #include "qmime.h"
    #endif // QT_H

    class Q_EXPORT QEvent: public Qt                // event base class
    {
    public:
        enum Type {

            // NOTE: if you get a strange compiler error on the line with "None",
            //       it's probably because you're trying to include X11, which
            //       has a mess of #defines in it.  Put the messy X11 includes
            //       *AFTER* the nice clean Qt includes.

            None = 0,                               // invalid event

            Timer = 1,                              // timer event
            MouseButtonPress = 2,                   // mouse button pressed
            MouseButtonRelease = 3,                 // mouse button released
            MouseButtonDblClick= 4,                 // mouse button double click
            MouseMove = 5,                          // mouse move
            KeyPress = 6,                           // key pressed
            KeyRelease = 7,                         // key released
            FocusIn = 8,                            // keyboard focus received
            FocusOut = 9,                           // keyboard focus lost
            Enter = 10,                             // mouse enters widget
            Leave = 11,                             // mouse leaves widget
            Paint = 12,                             // paint widget
            Move = 13,                              // move widget
            Resize = 14,                            // resize widget
            Create = 15,                            // after object creation
            Destroy = 16,                           // during object destruction
            Show = 17,                              // widget is shown
            Hide = 18,                              // widget is hidden
            Close = 19,                             // request to close widget
            Quit = 20,                              // request to quit application
            Reparent = 21,                          // widget has been reparented
            ShowMinimized = 22,                     // widget is shown minimized
            ShowNormal = 23,                        // widget is shown normal
            WindowActivate = 24,                    // window was activated
            WindowDeactivate = 25,                  // window was deactivated
            ShowToParent = 26,                      // widget is shown to parent
            HideToParent = 27,                      // widget is hidden to parent
            ShowMaximized = 28,                     // widget is shown maximized
            Accel = 30,                             // accelerator event
            Wheel = 31,                             // wheel event
            AccelAvailable = 32,                    // accelerator available event
            CaptionChange = 33,                     // caption changed
            IconChange = 34,                        // icon changed
            ParentFontChange = 35,                  // parent font changed
            ApplicationFontChange = 36,             // application font changed
            ParentPaletteChange = 37,               // parent font changed
            ApplicationPaletteChange = 38,          // application palette changed
            Clipboard = 40,                         // internal clipboard event
            Speech = 42,                            // reserved for speech input
            SockAct = 50,                           // socket activation
            AccelOverride = 51,                     // accelerator override event
            DragEnter = 60,                         // drag moves into widget
            DragMove = 61,                          // drag moves in widget
            DragLeave = 62,                         // drag leaves or is cancelled
            Drop = 63,                              // actual drop
            DragResponse = 64,                      // drag accepted/rejected
            ChildInserted = 70,                     // new child widget
            ChildRemoved = 71,                      // deleted child widget
            LayoutHint = 72,                        // child min/max size changed
            ShowWindowRequest = 73,                 // widget's window should be mapped
            ActivateControl = 80,                   // ActiveX activation
            DeactivateControl = 81,                 // ActiveX deactivation

            IMStart = 83,                           // input method composition start
            IMCompose = 84,                         // input method composition
            IMEnd = 85,                             // input method composition end

    #ifdef QT_KEYPAD_MODE
            EnterModalEdit = 100,                   // enter modal edit in keypad mode
            LeaveModalEdit = 101,                   // leave modal edit in keypad mode
    #endif

            User = 1000                             // first user event id
        };

        QEvent( Type type ) : t(type), posted(FALSE) {}
        virtual ~QEvent();
        Type  type() const  { return t; }
    protected:
        Type  t;
    private:
        bool  posted;
    #if defined(_CC_MSVC_)
        friend class QEvent;
    #endif

        friend class QApplication;
        friend class QBaseApplication;
    };

    class Q_EXPORT QTimerEvent : public QEvent
    {
    public:
        QTimerEvent( int timerId )
            : QEvent(Timer), id(timerId) {}
        int   timerId()     const   { return id; }
    protected:
        int   id;
    };

    class Q_EXPORT QMouseEvent : public QEvent
    {
    public:
        QMouseEvent( Type type, const QPoint &pos, int button, int state );

        QMouseEvent( Type type, const QPoint &pos, const QPoint&globalPos,
                     int button, int state )
            : QEvent(type), p(pos), g(globalPos), b(button),s((ushort)state) {};

        const QPoint &pos() const   { return p; }
        const QPoint &globalPos() const { return g; }
        int    x()          const   { return p.x(); }
        int    y()          const   { return p.y(); }
        int    globalX()    const   { return g.x(); }
        int    globalY()    const   { return g.y(); }
        ButtonState button() const  { return (ButtonState) b; }
        ButtonState state() const   { return (ButtonState) s; }
        ButtonState stateAfter() const;
    protected:
        QPoint p;
        QPoint g;
        int    b; // ### Make ushort in 3.0? Here it's an int...
        ushort s; // ### ...and here an ushort. But both are ButtonState!
    };

    class Q_EXPORT QWheelEvent : public QEvent
    {
    public:
        QWheelEvent( const QPoint &pos, int delta, int state );
        QWheelEvent( const QPoint &pos, const QPoint& globalPos, int delta, int state )
            : QEvent(Wheel), p(pos), g(globalPos), d(delta), s((ushort)state),
              accpt(TRUE) {}
        int    delta()      const   { return d; }
        const QPoint &pos() const   { return p; }
        const QPoint &globalPos() const     { return g; }
        int    x()          const   { return p.x(); }
        int    y()          const   { return p.y(); }
        int    globalX()    const   { return g.x(); }
        int    globalY()    const   { return g.y(); }
        ButtonState state() const   { return ButtonState(s); }
        bool   isAccepted() const   { return accpt; }
        void   accept()             { accpt = TRUE; }
        void   ignore()             { accpt = FALSE; }
    protected:
        QPoint p;
        QPoint g;
        int d;
        ushort s;
        bool   accpt;
    };

    class Q_EXPORT QKeyEvent : public QEvent
    {
    public:
        QKeyEvent( Type type, int key, int ascii, int state,
                    const QString& text=QString::null, bool autorep=FALSE, ushort count=1 )
            : QEvent(type), txt(text), k((ushort)key), s((ushort)state),
                a((uchar)ascii), accpt(TRUE), autor(autorep), c(count) {}
        int    key()        const   { return k; }
        int    ascii()      const   { return a; }
        ButtonState state() const   { return ButtonState(s); }
        ButtonState stateAfter() const;
        bool   isAccepted() const   { return accpt; }
        QString text()      const   { return txt; }
        bool   isAutoRepeat() const { return autor; }
        int   count() const { return int(c); }
        void   accept()             { accpt = TRUE; }
        void   ignore()             { accpt = FALSE; }

    protected:
        QString txt;
        ushort k, s;
        uchar  a;
        uint   accpt:1;
        uint   autor:1;
        ushort c;
    };

    class Q_EXPORT QFocusEvent : public QEvent
    {
    public:

        QFocusEvent( Type type )
            : QEvent(type) {}

        bool   gotFocus()   const { return type() == FocusIn; }
        bool   lostFocus()  const { return type() == FocusOut; }

        enum Reason { Mouse, Tab, ActiveWindow, Popup, Shortcut, Other };
        static Reason reason();
        static void setReason( Reason reason );
        static void resetReason();

    private:
        static Reason m_reason;
        static Reason prev_reason;
    };

    class Q_EXPORT QPaintEvent : public QEvent
    {
    public:
        QPaintEvent( const QRegion& paintRegion, bool erased = TRUE)
            : QEvent(Paint),
              rec(paintRegion.boundingRect()),
              reg(paintRegion),
              erase(erased){}
        QPaintEvent( const QRect &paintRect, bool erased = TRUE )
            : QEvent(Paint),
              rec(paintRect),
              reg(paintRect),
              erase(erased){}
        const QRect &rect() const     { return rec; }
        const QRegion &region() const { return reg; }
        bool erased() const { return erase; }
    protected:
        friend class QApplication;
        friend class QBaseApplication;
        QRect rec;
        QRegion reg;
        bool erase;
    };

    class Q_EXPORT QMoveEvent : public QEvent
    {
    public:
        QMoveEvent( const QPoint &pos, const QPoint &oldPos )
            : QEvent(Move), p(pos), oldp(oldPos) {}
        const QPoint &pos()   const { return p; }
        const QPoint &oldPos()const { return oldp;}
    protected:
        QPoint p, oldp;
        friend class QApplication;
        friend class QBaseApplication;
    };

    class Q_EXPORT QResizeEvent : public QEvent
    {
    public:
        QResizeEvent( const QSize &size, const QSize &oldSize )
            : QEvent(Resize), s(size), olds(oldSize) {}
        const QSize &size()   const { return s; }
        const QSize &oldSize()const { return olds;}
    protected:
        QSize s, olds;
        friend class QApplication;
        friend class QBaseApplication;
    };

    class Q_EXPORT QCloseEvent : public QEvent
    {
    public:
        QCloseEvent()
            : QEvent(Close), accpt(FALSE) {}
        bool   isAccepted() const   { return accpt; }
        void   accept()             { accpt = TRUE; }
        void   ignore()             { accpt = FALSE; }
    protected:
        bool   accpt;
    };

    class Q_EXPORT QShowEvent : public QEvent
    {
    public:
        QShowEvent(bool spontaneous)
            : QEvent(Show), spont(spontaneous) {}
        bool spontaneous() const { return spont; }
    protected:
        bool spont;
    };

    class Q_EXPORT QHideEvent : public QEvent
    {
    public:
        QHideEvent(bool spontaneous)
            : QEvent(Hide), spont(spontaneous) {}
        bool spontaneous() const { return spont; }
    protected:
        bool spont;
    };

    class Q_EXPORT QIMEvent : public QEvent
    {
    public:
        QIMEvent( Type type, const QString &text, int cursorPosition )
            : QEvent(type), txt(text), cpos(cursorPosition), a(FALSE) {}
        const QString &text() const { return txt; }
        int cursorPos() const { return cpos; }
        bool isAccepted() const { return a; }
        void accept() { a = TRUE; }
        void ignore() { a = FALSE; }
        int selectionLength() const;

    private:
        QString txt;
        int cpos;
        bool a;
    };

    class Q_EXPORT QIMComposeEvent : public QIMEvent
    {
    public:
        QIMComposeEvent( Type type, const QString &text, int cursorPosition,
                         int selLength )
            : QIMEvent( type, text, cursorPosition ), selLen( selLength ) { }

    private:
        int selLen;

        friend class QIMEvent;
    };

    inline int QIMEvent::selectionLength() const
    {
        if ( type() != IMCompose ) return 0;
        QIMComposeEvent *that = (QIMComposeEvent *) this;
        return that->selLen;
    }

    #ifndef QT_NO_DRAGANDDROP

    // This class is rather closed at the moment.  If you need to create your
    // own DND event objects, write to qt-bugs@trolltech.com and we'll try to
    // find a way to extend it so it covers your needs.

    class Q_EXPORT QDropEvent : public QEvent, public QMimeSource
    {
    public:
        QDropEvent( const QPoint& pos, Type typ=Drop )
            : QEvent(typ), p(pos),
              act(0), accpt(0), accptact(0), resv(0),
              d(0)
            {}
        const QPoint &pos() const   { return p; }
        bool isAccepted() const     { return accpt || accptact; }
        void accept(bool y=TRUE)    { accpt = y; }
        void ignore()               { accpt = FALSE; }

        bool isActionAccepted() const { return accptact; }
        void acceptAction(bool y=TRUE) { accptact = y; }
        enum Action { Copy, Link, Move, Private, UserAction=100 };
        void setAction( Action a ) { act = (uint)a; }
        Action action() const { return Action(act); }

        QWidget* source() const;
        const char* format( int n = 0 ) const;
        QByteArray encodedData( const char* ) const;
        bool provides( const char* ) const;

        QByteArray data(const char* f) const { return encodedData(f); }

        void setPoint( const QPoint& np ) { p = np; }

    protected:
        QPoint p;
        uint act:8;
        uint accpt:1;
        uint accptact:1;
        uint resv:5;
        void * d;
    };

    class Q_EXPORT QDragMoveEvent : public QDropEvent
    {
    public:
        QDragMoveEvent( const QPoint& pos, Type typ=DragMove )
            : QDropEvent(pos,typ),
              rect( pos, QSize( 1, 1 ) ) {}
        QRect answerRect() const { return rect; }
        void accept( bool y=TRUE ) { QDropEvent::accept(y); }
        void accept( const QRect & r) { accpt = TRUE; rect = r; }
        void ignore( const QRect & r) { accpt =FALSE; rect = r; }
        void ignore()               { QDropEvent::ignore(); }

    protected:
        QRect rect;
    };

    class Q_EXPORT QDragEnterEvent : public QDragMoveEvent
    {
    public:
        QDragEnterEvent( const QPoint& pos ) :
            QDragMoveEvent(pos, DragEnter) { }
    };

    /* An internal class */
    class Q_EXPORT QDragResponseEvent : public QEvent
    {
    public:
        QDragResponseEvent( bool accepted )
            : QEvent(DragResponse), a(accepted) {}
        bool   dragAccepted() const { return a; }
    protected:
        bool a;
    };

    class Q_EXPORT QDragLeaveEvent : public QEvent
    {
    public:
        QDragLeaveEvent()
            : QEvent(DragLeave) {}
    };

    #endif // QT_NO_DRAGANDDROP

    class Q_EXPORT QChildEvent : public QEvent
    {
    public:
        QChildEvent( Type type, QObject *child )
            : QEvent(type), c(child) {}
        QObject *child() const      { return c; }
        bool inserted() const { return t == ChildInserted; }
        bool removed() const { return t == ChildRemoved; }
    protected:
        QObject *c;
    };

    class Q_EXPORT QCustomEvent : public QEvent
    {
    public:
        QCustomEvent( int type );
        QCustomEvent( Type type, void *data )
            : QEvent(type), d(data) {};
        void       *data()  const   { return d; }
        void        setData( void* data )   { d = data; }
    private:
        void       *d;
    };

    #endif // QEVENT_H