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86 lines
2.3 KiB
C++
86 lines
2.3 KiB
C++
/* This file is part of the KDE and the Kate project
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*
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* Copyright (C) 2013 Dominik Haumann <dhaumann@kde.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef KATE_FADE_EFFECT_H
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#define KATE_FADE_EFFECT_H
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#include <QObject>
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#include <QPointer>
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#include <QWidget>
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#include <QTimeLine>
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#include <QGraphicsOpacityEffect>
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/**
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* This class provides a fade in/out effect for arbitrary QWidget%s.
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* Example:
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* \code
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* KateFadeEffect* fadeEffect = new KateFadeEffect(someWidget);
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* fadeEffect->fadeIn();
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* //...
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* fadeEffect->fadeOut();
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* \endcode
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*/
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class KateFadeEffect : public QObject
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{
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Q_OBJECT
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public:
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/**
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* Constructor.
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* By default, the widget is fully opaque (opacity = 1.0).
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*/
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KateFadeEffect(QWidget* widget = 0);
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public Q_SLOTS:
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/**
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* Call to fade out and hide the widget.
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*/
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void fadeOut();
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/**
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* Call to show and fade in the widget
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*/
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void fadeIn();
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Q_SIGNALS:
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/**
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* This signal is emitted when the hiding animation is finished.
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* At this point, the associated widget is hidden.
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*/
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void widgetHidden();
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protected Q_SLOTS:
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/**
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* Helper to update opacity value
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*/
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void opacityChanged(qreal value);
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/**
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* When the animation is finished, hide the widget if fading out.
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*/
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void animationFinished();
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private:
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QPointer<QWidget> m_widget; ///< the fading widget
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QTimeLine* m_timeLine; ///< update time line
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QPointer<QGraphicsOpacityEffect> m_effect; ///< graphics opacity effect
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};
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#endif
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// kate: space-indent on; indent-width 2; replace-tabs on;
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