|  | Home · All Namespaces · All Classes · Main Classes · Grouped Classes · Modules · Functions |

# pieview.h Example File
itemviews/chart/pieview.h

     /****************************************************************************
     **
     ** Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
     ** Contact: Qt Software Information (qt-info@nokia.com)
     **
     ** This file is part of the example classes of the Qt Toolkit.
     **
     ** Commercial Usage
     ** Licensees holding valid Qt Commercial licenses may use this file in
     ** accordance with the Qt Commercial License Agreement provided with the
     ** Software or, alternatively, in accordance with the terms contained in
     ** a written agreement between you and Nokia.
     **
     **
     ** GNU General Public License Usage
     ** Alternatively, this file may be used under the terms of the GNU
     ** General Public License versions 2.0 or 3.0 as published by the Free
     ** Software Foundation and appearing in the file LICENSE.GPL included in
     ** the packaging of this file.  Please review the following information
     ** to ensure GNU General Public Licensing requirements will be met:
     ** http://www.fsf.org/licensing/licenses/info/GPLv2.html and
     ** http://www.gnu.org/copyleft/gpl.html.  In addition, as a special
     ** exception, Nokia gives you certain additional rights. These rights
     ** are described in the Nokia Qt GPL Exception version 1.3, included in
     ** the file GPL_EXCEPTION.txt in this package.
     **
     ** Qt for Windows(R) Licensees
     ** As a special exception, Nokia, as the sole copyright holder for Qt
     ** Designer, grants users of the Qt/Eclipse Integration plug-in the
     ** right for the Qt/Eclipse Integration to link to functionality
     ** provided by Qt Designer and its related libraries.
     **
     ** If you are unsure which license is appropriate for your use, please
     ** contact the sales department at qt-sales@nokia.com.
     **
     ****************************************************************************/

     #ifndef PIEVIEW_H
     #define PIEVIEW_H

     #include <QAbstractItemView>
     #include <QFont>
     #include <QItemSelection>
     #include <QItemSelectionModel>
     #include <QModelIndex>
     #include <QRect>
     #include <QSize>
     #include <QPoint>
     #include <QWidget>

     class QRubberBand;

     class PieView : public QAbstractItemView
     {
         Q_OBJECT

     public:
         PieView(QWidget *parent = 0);

         QRect visualRect(const QModelIndex &index) const;
         void scrollTo(const QModelIndex &index, ScrollHint hint = EnsureVisible);
         QModelIndex indexAt(const QPoint &point) const;

     protected slots:
         void dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight);
         void rowsInserted(const QModelIndex &parent, int start, int end);
         void rowsAboutToBeRemoved(const QModelIndex &parent, int start, int end);

     protected:
         bool edit(const QModelIndex &index, EditTrigger trigger, QEvent *event);
         QModelIndex moveCursor(QAbstractItemView::CursorAction cursorAction,
                                Qt::KeyboardModifiers modifiers);

         int horizontalOffset() const;
         int verticalOffset() const;

         bool isIndexHidden(const QModelIndex &index) const;

         void setSelection(const QRect&, QItemSelectionModel::SelectionFlags command);

         void mousePressEvent(QMouseEvent *event);

         void mouseMoveEvent(QMouseEvent *event);
         void mouseReleaseEvent(QMouseEvent *event);

         void paintEvent(QPaintEvent *event);
         void resizeEvent(QResizeEvent *event);
         void scrollContentsBy(int dx, int dy);

         QRegion visualRegionForSelection(const QItemSelection &selection) const;

     private:
         QRect itemRect(const QModelIndex &item) const;
         QRegion itemRegion(const QModelIndex &index) const;
         int rows(const QModelIndex &index = QModelIndex()) const;
         void updateGeometries();

         int margin;
         int totalSize;
         int pieSize;
         int validItems;
         double totalValue;
         QPoint origin;
         QRubberBand *rubberBand;
     };

     #endif