workspace/plasma/applets/kickoff/ui/tabbar.h

   1 /*
   2     Copyright 2007 Robert Knight <robertknight@gmail.com>
   3
   4     This library is free software; you can redistribute it and/or
   5     modify it under the terms of the GNU Library General Public
   6     License as published by the Free Software Foundation; either
   7     version 2 of the License, or (at your option) any later version.
   8
   9     This library is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12     Library General Public License for more details.
  13
  14     You should have received a copy of the GNU Library General Public License
  15     along with this library; see the file COPYING.LIB.  If not, write to
  16     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  17     Boston, MA 02110-1301, USA.
  18 */
  19
  20 #ifndef TABBAR_H
  21 #define TABBAR_H
  22
  23 #include <QTabBar>
  24 #include <QTimer>
  25
  26 namespace Plasma
  27 {
  28 class FrameSvg;
  29 }
  30
  31 namespace Kickoff
  32 {
  33
  34 class TabBar : public QTabBar
  35 {
  36     Q_OBJECT
  37
  38 public:
  39     TabBar(QWidget *parent);
  40
  41     QSize sizeHint() const;
  42     /** Like the setCurrentIndex() method but switches the tab without using any
  43     animation. This is used e.g. within Launcher::reset() to switch back to the
  44     favorite tab before Kickoff got shown. */
  45     void setCurrentIndexWithoutAnimation(int index);
  46
  47     /** Specifies whether hovering switches between tabs or if a click is required to switch the tabs. */
  48     void setSwitchTabsOnHover(bool switchOnHover);
  49     bool switchTabsOnHover() const;
  50     void setAnimateSwitch(bool animateSwitch);
  51     bool animateSwitch();
  52     void setShape(Shape shape);
  53
  54 protected:
  55     int lastIndex() const;
  56
  57     // reimplemented from QTabBar
  58     virtual QSize tabSizeHint(int index) const;
  59     virtual void paintEvent(QPaintEvent *event);
  60     virtual void leaveEvent(QEvent *event);
  61     virtual void mouseMoveEvent(QMouseEvent *event);
  62     virtual void resizeEvent(QResizeEvent* event);
  63
  64     bool isHorizontal() const;
  65     bool isVertical() const;
  66
  67 protected slots:
  68     void switchToHoveredTab();
  69     void animationFinished();
  70     void startAnimation();
  71     void onValueChanged(qreal val);
  72
  73 private:
  74     QPainterPath tabPath(const QRect &r);
  75
  76     static const int TAB_CONTENTS_MARGIN = 6;
  77     int m_hoveredTabIndex;
  78     QTimer m_tabSwitchTimer;
  79     bool m_switchOnHover;
  80     bool m_animateSwitch;
  81     QRect m_currentAnimRect;
  82     int m_lastIndex[2];
  83     qreal m_animProgress;
  84     Plasma::FrameSvg *background;
  85
  86     QSize tabSize(int index) const;
  87     void storeLastIndex();
  88 };
  89
  90 }
  91
  92 #endif // TABBAR_H