| 1 | /****************************************************************************
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| 2 | **
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| 3 | ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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| 4 | ** All rights reserved.
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| 5 | ** Contact: Nokia Corporation (qt-info@nokia.com)
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| 6 | **
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| 7 | ** This file is part of the examples of the Qt Toolkit.
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| 8 | **
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| 9 | ** $QT_BEGIN_LICENSE:BSD$
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| 10 | ** You may use this file under the terms of the BSD license as follows:
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| 11 | **
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| 12 | ** "Redistribution and use in source and binary forms, with or without
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| 13 | ** modification, are permitted provided that the following conditions are
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| 14 | ** met:
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| 15 | ** * Redistributions of source code must retain the above copyright
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| 16 | ** notice, this list of conditions and the following disclaimer.
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| 17 | ** * Redistributions in binary form must reproduce the above copyright
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| 18 | ** notice, this list of conditions and the following disclaimer in
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| 19 | ** the documentation and/or other materials provided with the
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| 20 | ** distribution.
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| 21 | ** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
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| 22 | ** the names of its contributors may be used to endorse or promote
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| 23 | ** products derived from this software without specific prior written
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| 24 | ** permission.
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| 25 | **
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| 26 | ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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| 27 | ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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| 28 | ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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| 29 | ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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| 30 | ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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| 31 | ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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| 32 | ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 33 | ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 34 | ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 35 | ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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| 36 | ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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| 37 | ** $QT_END_LICENSE$
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| 38 | **
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| 39 | ****************************************************************************/
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| 40 |
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| 41 | #ifndef PIEVIEW_H
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| 42 | #define PIEVIEW_H
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| 43 |
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| 44 | #include <QAbstractItemView>
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| 45 | #include <QFont>
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| 46 | #include <QItemSelection>
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| 47 | #include <QItemSelectionModel>
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| 48 | #include <QModelIndex>
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| 49 | #include <QRect>
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| 50 | #include <QSize>
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| 51 | #include <QPoint>
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| 52 | #include <QWidget>
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| 53 |
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| 54 | QT_BEGIN_NAMESPACE
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| 55 | class QRubberBand;
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| 56 | QT_END_NAMESPACE
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| 57 |
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| 58 | //! [0]
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| 59 | class PieView : public QAbstractItemView
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| 60 | {
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| 61 | Q_OBJECT
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| 62 |
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| 63 | public:
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| 64 | PieView(QWidget *parent = 0);
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| 65 |
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| 66 | QRect visualRect(const QModelIndex &index) const;
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| 67 | void scrollTo(const QModelIndex &index, ScrollHint hint = EnsureVisible);
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| 68 | QModelIndex indexAt(const QPoint &point) const;
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| 69 |
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| 70 | protected slots:
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| 71 | void dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight);
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| 72 | void rowsInserted(const QModelIndex &parent, int start, int end);
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| 73 | void rowsAboutToBeRemoved(const QModelIndex &parent, int start, int end);
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| 74 |
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| 75 | protected:
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| 76 | bool edit(const QModelIndex &index, EditTrigger trigger, QEvent *event);
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| 77 | QModelIndex moveCursor(QAbstractItemView::CursorAction cursorAction,
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| 78 | Qt::KeyboardModifiers modifiers);
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| 79 |
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| 80 | int horizontalOffset() const;
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| 81 | int verticalOffset() const;
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| 82 |
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| 83 | bool isIndexHidden(const QModelIndex &index) const;
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| 84 |
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| 85 | void setSelection(const QRect&, QItemSelectionModel::SelectionFlags command);
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| 86 |
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| 87 | void mousePressEvent(QMouseEvent *event);
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| 88 |
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| 89 | void mouseMoveEvent(QMouseEvent *event);
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| 90 | void mouseReleaseEvent(QMouseEvent *event);
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| 91 |
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| 92 | void paintEvent(QPaintEvent *event);
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| 93 | void resizeEvent(QResizeEvent *event);
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| 94 | void scrollContentsBy(int dx, int dy);
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| 95 |
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| 96 | QRegion visualRegionForSelection(const QItemSelection &selection) const;
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| 97 |
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| 98 | private:
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| 99 | QRect itemRect(const QModelIndex &item) const;
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| 100 | QRegion itemRegion(const QModelIndex &index) const;
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| 101 | int rows(const QModelIndex &index = QModelIndex()) const;
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| 102 | void updateGeometries();
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| 103 |
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| 104 | int margin;
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| 105 | int totalSize;
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| 106 | int pieSize;
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| 107 | int validItems;
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| 108 | double totalValue;
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| 109 | QPoint origin;
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| 110 | QRubberBand *rubberBand;
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| 111 | };
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| 112 | //! [0]
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| 113 |
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| 114 | #endif
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