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

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

     /****************************************************************************
     **
     ** Copyright (C) 2004-2008 Trolltech ASA. All rights reserved.
     **
     ** This file is part of the example classes of the Qt Toolkit.
     **
     ** 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 files LICENSE.GPL2 and LICENSE.GPL3
     ** included in the packaging of this file.  Alternatively you may (at
     ** your option) use any later version of the GNU General Public
     ** License if such license has been publicly approved by Trolltech ASA
     ** (or its successors, if any) and the KDE Free Qt Foundation. In
     ** addition, as a special exception, Trolltech gives you certain
     ** additional rights. These rights are described in the Trolltech GPL
     ** Exception version 1.2, which can be found at
     ** http://www.trolltech.com/products/qt/gplexception/ and in the file
     ** GPL_EXCEPTION.txt in this package.
     **
     ** Please review the following information to ensure GNU General
     ** Public Licensing requirements will be met:
     ** http://trolltech.com/products/qt/licenses/licensing/opensource/. If
     ** you are unsure which license is appropriate for your use, please
     ** review the following information:
     ** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
     ** or contact the sales department at sales@trolltech.com.
     **
     ** In addition, as a special exception, Trolltech, 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.
     **
     ** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
     ** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
     ** A PARTICULAR PURPOSE. Trolltech reserves all rights not expressly
     ** granted herein.
     **
     ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
     ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
     **
     ****************************************************************************/

     #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