Home · 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.
 **
 ** Licensees holding a valid Qt License Agreement may use this file in
 ** accordance with the rights, responsibilities and obligations
 ** contained therein.  Please consult your licensing agreement or
 ** contact sales@trolltech.com if any conditions of this licensing
 ** agreement are not clear to you.
 **
 ** Further information about Qt licensing is available at:
 ** http://www.trolltech.com/products/qt/licensing.html or by
 ** contacting info@trolltech.com.
 **
 ** 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


Copyright © 2008 Trolltech Trademarks
Qt 4.3.5