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tabbar.h

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00001 /*
00002     Copyright 2007 Robert Knight <robertknight@gmail.com>
00003 
00004     This library is free software; you can redistribute it and/or
00005     modify it under the terms of the GNU Library General Public
00006     License as published by the Free Software Foundation; either
00007     version 2 of the License, or (at your option) any later version.
00008 
00009     This library is distributed in the hope that it will be useful,
00010     but WITHOUT ANY WARRANTY; without even the implied warranty of
00011     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012     Library General Public License for more details.
00013 
00014     You should have received a copy of the GNU Library General Public License
00015     along with this library; see the file COPYING.LIB.  If not, write to
00016     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
00017     Boston, MA 02110-1301, USA.
00018 */
00019 
00020 #ifndef TABBAR_H
00021 #define TABBAR_H
00022 
00023 #include <QTabBar>
00024 #include <QTimer>
00025 
00026 namespace Plasma
00027 {
00028 class FrameSvg;
00029 }
00030 
00031 namespace Kickoff
00032 {
00033 
00034 class TabBar : public QTabBar
00035 {
00036     Q_OBJECT
00037 
00038 public:
00039     TabBar(QWidget *parent);
00040 
00041     QSize sizeHint() const;
00045     void setCurrentIndexWithoutAnimation(int index);
00046 
00048     void setSwitchTabsOnHover(bool switchOnHover);
00049     bool switchTabsOnHover() const;
00050     void setAnimateSwitch(bool animateSwitch);
00051     bool animateSwitch();
00052     void setShape(Shape shape);
00053 
00054 protected:
00055     int lastIndex() const;
00056 
00057     // reimplemented from QTabBar
00058     virtual QSize tabSizeHint(int index) const;
00059     virtual void paintEvent(QPaintEvent *event);
00060     virtual void leaveEvent(QEvent *event);
00061     virtual void mouseMoveEvent(QMouseEvent *event);
00062     virtual void resizeEvent(QResizeEvent* event);
00063 
00064     bool isHorizontal() const;
00065     bool isVertical() const;
00066 
00067 protected slots:
00068     void switchToHoveredTab();
00069     void animationFinished();
00070     void startAnimation();
00071     void onValueChanged(qreal val);
00072 
00073 private:
00074     QPainterPath tabPath(const QRect &r);
00075 
00076     static const int TAB_CONTENTS_MARGIN = 6;
00077     int m_hoveredTabIndex;
00078     QTimer m_tabSwitchTimer;
00079     bool m_switchOnHover;
00080     bool m_animateSwitch;
00081     QRect m_currentAnimRect;
00082     int m_lastIndex[2];
00083     qreal m_animProgress;
00084     Plasma::FrameSvg *background;
00085 
00086     QSize tabSize(int index) const;
00087     void storeLastIndex();
00088 };
00089 
00090 }
00091 
00092 #endif // TABBAR_H

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