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.html 132191 2002-01-17 21:32:13Z dfaure $
 *
 */
#ifndef _KCURSOR_H
#define _KCURSOR_H

#include 

class QCursor;
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: /** * Constructor. * * Does not do anything so far. **/ KCursor(); /** * Retrieve the proper hand cursor according to * the current GUI style (static function). */ static QCursor handCursor(); /** * Retrieve the proper arrow cursor according to * the current GUI style (static function). */ static QCursor arrowCursor(); /** * Retrieve the proper up arrow cursor according to * the current GUI style (static function). */ static QCursor upArrowCursor(); /** * Retrieve the proper cross-hair cursor according to * the current GUI style (static function). */ static QCursor crossCursor(); /** * Retrieve the proper hourglass cursor according to * the current GUI style (static function). */ static QCursor waitCursor(); /** * Retrieve the proper text cursor according to * the current GUI style (static function). */ static QCursor ibeamCursor(); /** * Retrieve the proper vertical resize cursor * according to the current GUI style (static function). */ static QCursor sizeVerCursor(); /** * Retrieve the proper horizontal resize cursor * according to the current GUI style (static function). */ static QCursor sizeHorCursor(); /** * Retrieve the proper diagonal resize (/) cursor * according to the current GUI style (static function). */ static QCursor sizeBDiagCursor(); /** * Retrieve the proper diagonal resize (\) cursor * according to the current GUI style (static function). */ static QCursor sizeFDiagCursor(); /** * Retrieve the proper all-directions resize cursor * according to the current GUI style (static function). */ static QCursor sizeAllCursor(); /** * Retrieve a blank or invisible cursor (static function). */ static QCursor blankCursor(); /** * 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 * ); }; #endif // _KCURSOR_H

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