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/* This file is part of the KDE libraries Copyright (C) 1998 Kurt Granroth (granroth@kde.org) 2000 Carsten Pfeiffer <pfeiffer@kde.org> 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 84528 2001-02-27 00:42:21Z dfaure $ * */ #ifndef _KCURSOR_H #define _KCURSOR_H #include <kapp.h> 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 * <PRE> * setCursor(KCursor::handCursor()); * </PRE> * * @short A QCursor wrapper allowing "themed" cursors and auto-hiding cursors. * @author Kurt Granroth <granroth@kde.org> */ 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: * <pre> * 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 * [...] * } * </pre> * * 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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