Source: kcursor.h

# Source: kcursor.h |
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    /* This file is part of the KDE libraries
       Copyright (C) 1998 Kurt Granroth (granroth@kde.org)
                     2000 Carsten Pfeiffer

       This library is free software; you can redistribute it and/or
       modify it under the terms of the GNU Library General Public
       License version 2 as published by the Free Software Foundation.

       This library is distributed in the hope that it will be useful,
       but WITHOUT ANY WARRANTY; without even the implied warranty of
       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
       Library General Public License for more details.

       You should have received a copy of the GNU Library General Public License
       along with this library; see the file COPYING.LIB.  If not, write to
       the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
       Boston, MA 02111-1307, USA.
    */
    /*
     * $Id: kcursor.h,v 1.15 2001/12/11 12:19:15 lunakl Exp $
     *
     */
    #ifndef _KCURSOR_H
    #define _KCURSOR_H

    #include

    class QWidget;

    /**
     * A wrapper around @ref QCursor that allows for "themed" cursors.
     *
     * Currently, the only themed cursor is a hand shaped cursor.
     *
     * A typical usage would be
     *
     * 	setCursor(KCursor::handCursor());
     *
     *
     * @short A QCursor wrapper allowing "themed" cursors and auto-hiding cursors.
     * @author Kurt Granroth
     */
    class KCursor : public Qt
    {
    public:
        /**
         * Constructor.
         *
         * Does not do anything so far.
         **/
        KCursor();

        /**
         * Returns the proper hand cursor according to
         * the current GUI style (static function).
         */
        static QCursor handCursor();

        /**
         * Returns the proper arrow+hourglass cursor according to
         * the current GUI style (static function).
         */
        static QCursor workingCursor();

        /**
         * Returns the proper arrow cursor according to
         * the current GUI style (static function).
         */
        static QCursor arrowCursor();

        /**
         * Returns the proper up arrow cursor according to
         * the current GUI style (static function).
         */
        static QCursor upArrowCursor();

        /**
         * Returns the proper cross-hair cursor according to
         * the current GUI style (static function).
         */
        static QCursor crossCursor();

        /**
         * Returns the proper hourglass cursor according to
         * the current GUI style (static function).
         */
        static QCursor waitCursor();

        /**
         * Returns the proper text cursor according to
         * the current GUI style (static function).
         */
        static QCursor ibeamCursor();

        /**
         * Returns the proper vertical resize cursor
         * according to the current GUI style (static function).
         */
        static QCursor sizeVerCursor();

        /**
         * Returns the proper horizontal resize cursor
         * according to the current GUI style (static function).
         */
        static QCursor sizeHorCursor();

        /**
         * Returns the proper diagonal resize (/) cursor
         * according to the current GUI style (static function).
         */
        static QCursor sizeBDiagCursor();

        /**
         * Returns the proper diagonal resize (\) cursor
         * according to the current GUI style (static function).
         */
        static QCursor sizeFDiagCursor();

        /**
         * Returns the proper all-directions resize cursor
         * according to the current GUI style (static function).
         */
        static QCursor sizeAllCursor();

        /**
         * Returns a blank or invisible cursor (static function).
         */
        static QCursor blankCursor();

        /**
         * Returns a WhatsThis cursor (static function).
         */
        static QCursor whatsThisCursor();

        /**
         * Sets auto-hiding the cursor for widget @p w. Enabling it will result in
         * the cursor being hidden when
         * @li a key-event happens
         * @li there are no key-events for a configured time-frame (see
         *     @ref setHideCursorDelay())
         *
         * The cursor will be shown again when the focus is lost or a mouse-event
         * happens.
         *
         * Side effect: when enabling auto-hide, mouseTracking is enabled for the
         * specified widget, because it's needed to get mouse-move-events. So
         * don't disable mouseTracking for a widget while using auto-hide for it.
         *
         * When disabling auto-hide, mouseTracking will be disabled, so if you need
         * mouseTracking after disabling auto-hide, you have to reenable
         * mouseTracking.
         *
         * If you want to use auto-hiding for widgets that don't take focus, e.g.
         * a QCanvasView, then you have to pass all key-events that should trigger
         * auto-hiding to @ref autoHideEventFilter().
         */
        static void setAutoHideCursor( QWidget *w, bool enable );

        /**
         * Overloaded method for the case where you have an event-filter installed
         * on the widget you want to enable auto-cursor-hiding.
         *
         * In this case set @p customEventFilter to true and call
         * @ref autoHideEventFilter() from the beginning of your eventFilter().
         *
         * @see #autoHideEventFilter
         */
        static void setAutoHideCursor( QWidget *w, bool enable,
    				   bool customEventFilter );

        /**
         * Sets the delay time in milliseconds for auto-hiding. When no keyboard
         * events arrive for that time-frame, the cursor will be hidden.
         *
         * Default is 5000, i.e. 5 seconds.
         */
        static void setHideCursorDelay( int ms );

        /**
         * @returns the current auto-hide delay time.
         *
         * Default is 5000, i.e. 5 seconds.
         */
        static int hideCursorDelay();

        /**
         * KCursor has to install an eventFilter over the widget you want to
         * auto-hide. If you have an own eventFilter() on that widget and stop
         * some events by returning true, you might break auto-hiding, because
         * KCursor doesn't get those events.
         *
         * In this case, you need to call setAutoHideCursor( widget, true, true );
         * to tell KCursor not to install an eventFilter. Then you call this method
         * from the beginning of your eventFilter, for example:
         *
         * edit = new KEdit( this, "some edit widget" );
         * edit->installEventFilter( this );
         * KCursor::setAutoHideCursor( edit, true, true );
         *
         * [...]
         *
         * bool YourClass::eventFilter( QObject *o, QEvent *e )
         * {
         *     if ( o == edit ) // only that widget where you enabled auto-hide!
         *         KCursor::autoHideEventFilter( o, e );
         *
         *     // now you can do your own event-processing
         *     [...]
         * }
         *
         *
         * Note that you must not call KCursor::autoHideEventFilter() when you
         * didn't enable or after disabling auto-hiding.
         */
        static void autoHideEventFilter( QObject *, QEvent * );

    private:
        static QCursor *s_handCursor;
    };

    #endif // _KCURSOR_H

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