author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Fri, 19 Feb 2010 23:40:16 +0200 | |
branch | RCL_3 |
changeset 4 | 3b1da2848fc7 |
parent 0 | 1918ee327afb |
permissions | -rw-r--r-- |
0 | 1 |
/**************************************************************************** |
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** |
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3b1da2848fc7
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). |
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** All rights reserved. |
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** Contact: Nokia Corporation (qt-info@nokia.com) |
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** |
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** This file is part of the examples of the Qt Toolkit. |
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** |
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** $QT_BEGIN_LICENSE:LGPL$ |
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** No Commercial Usage |
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** This file contains pre-release code and may not be distributed. |
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** You may use this file in accordance with the terms and conditions |
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** contained in the Technology Preview License Agreement accompanying |
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** this package. |
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** |
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** GNU Lesser General Public License Usage |
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** Alternatively, this file may be used under the terms of the GNU Lesser |
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** General Public License version 2.1 as published by the Free Software |
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** Foundation and appearing in the file LICENSE.LGPL included in the |
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** packaging of this file. Please review the following information to |
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** ensure the GNU Lesser General Public License version 2.1 requirements |
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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** |
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** In addition, as a special exception, Nokia gives you certain additional |
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** rights. These rights are described in the Nokia Qt LGPL Exception |
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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** |
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** If you have questions regarding the use of this file, please contact |
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** Nokia at qt-info@nokia.com. |
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** |
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** |
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** |
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** |
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** |
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** |
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** |
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** |
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** $QT_END_LICENSE$ |
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** |
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****************************************************************************/ |
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#include <math.h> |
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#include <QtGui> |
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#ifndef M_PI |
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#define M_PI 3.1415927 |
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#endif |
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#include "pieview.h" |
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PieView::PieView(QWidget *parent) |
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: QAbstractItemView(parent) |
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{ |
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horizontalScrollBar()->setRange(0, 0); |
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verticalScrollBar()->setRange(0, 0); |
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margin = 8; |
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totalSize = 300; |
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pieSize = totalSize - 2*margin; |
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validItems = 0; |
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totalValue = 0.0; |
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rubberBand = 0; |
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} |
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||
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void PieView::dataChanged(const QModelIndex &topLeft, |
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const QModelIndex &bottomRight) |
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{ |
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QAbstractItemView::dataChanged(topLeft, bottomRight); |
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validItems = 0; |
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totalValue = 0.0; |
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for (int row = 0; row < model()->rowCount(rootIndex()); ++row) { |
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QModelIndex index = model()->index(row, 1, rootIndex()); |
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double value = model()->data(index).toDouble(); |
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if (value > 0.0) { |
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totalValue += value; |
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validItems++; |
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} |
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} |
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viewport()->update(); |
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} |
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bool PieView::edit(const QModelIndex &index, EditTrigger trigger, QEvent *event) |
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{ |
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if (index.column() == 0) |
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return QAbstractItemView::edit(index, trigger, event); |
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else |
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return false; |
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} |
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||
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/* |
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Returns the item that covers the coordinate given in the view. |
|
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*/ |
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QModelIndex PieView::indexAt(const QPoint &point) const |
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{ |
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if (validItems == 0) |
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return QModelIndex(); |
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// Transform the view coordinates into contents widget coordinates. |
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int wx = point.x() + horizontalScrollBar()->value(); |
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int wy = point.y() + verticalScrollBar()->value(); |
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if (wx < totalSize) { |
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double cx = wx - totalSize/2; |
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double cy = totalSize/2 - wy; // positive cy for items above the center |
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// Determine the distance from the center point of the pie chart. |
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double d = pow(pow(cx, 2) + pow(cy, 2), 0.5); |
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if (d == 0 || d > pieSize/2) |
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return QModelIndex(); |
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// Determine the angle of the point. |
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double angle = (180 / M_PI) * acos(cx/d); |
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if (cy < 0) |
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angle = 360 - angle; |
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// Find the relevant slice of the pie. |
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double startAngle = 0.0; |
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for (int row = 0; row < model()->rowCount(rootIndex()); ++row) { |
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QModelIndex index = model()->index(row, 1, rootIndex()); |
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double value = model()->data(index).toDouble(); |
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if (value > 0.0) { |
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double sliceAngle = 360*value/totalValue; |
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if (angle >= startAngle && angle < (startAngle + sliceAngle)) |
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return model()->index(row, 1, rootIndex()); |
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startAngle += sliceAngle; |
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} |
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} |
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} else { |
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double itemHeight = QFontMetrics(viewOptions().font).height(); |
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int listItem = int((wy - margin) / itemHeight); |
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int validRow = 0; |
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for (int row = 0; row < model()->rowCount(rootIndex()); ++row) { |
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QModelIndex index = model()->index(row, 1, rootIndex()); |
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if (model()->data(index).toDouble() > 0.0) { |
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if (listItem == validRow) |
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return model()->index(row, 0, rootIndex()); |
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// Update the list index that corresponds to the next valid row. |
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validRow++; |
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} |
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} |
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} |
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return QModelIndex(); |
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} |
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bool PieView::isIndexHidden(const QModelIndex & /*index*/) const |
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{ |
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return false; |
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} |
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/* |
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Returns the rectangle of the item at position \a index in the |
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model. The rectangle is in contents coordinates. |
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*/ |
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QRect PieView::itemRect(const QModelIndex &index) const |
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{ |
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if (!index.isValid()) |
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return QRect(); |
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// Check whether the index's row is in the list of rows represented |
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// by slices. |
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QModelIndex valueIndex; |
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if (index.column() != 1) |
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valueIndex = model()->index(index.row(), 1, rootIndex()); |
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else |
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valueIndex = index; |
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if (model()->data(valueIndex).toDouble() > 0.0) { |
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int listItem = 0; |
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for (int row = index.row()-1; row >= 0; --row) { |
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if (model()->data(model()->index(row, 1, rootIndex())).toDouble() > 0.0) |
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listItem++; |
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} |
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double itemHeight; |
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switch (index.column()) { |
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case 0: |
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itemHeight = QFontMetrics(viewOptions().font).height(); |
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return QRect(totalSize, |
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int(margin + listItem*itemHeight), |
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totalSize - margin, int(itemHeight)); |
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case 1: |
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return viewport()->rect(); |
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} |
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} |
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return QRect(); |
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} |
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QRegion PieView::itemRegion(const QModelIndex &index) const |
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{ |
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if (!index.isValid()) |
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return QRegion(); |
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if (index.column() != 1) |
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return itemRect(index); |
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if (model()->data(index).toDouble() <= 0.0) |
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return QRegion(); |
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double startAngle = 0.0; |
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for (int row = 0; row < model()->rowCount(rootIndex()); ++row) { |
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QModelIndex sliceIndex = model()->index(row, 1, rootIndex()); |
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double value = model()->data(sliceIndex).toDouble(); |
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if (value > 0.0) { |
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double angle = 360*value/totalValue; |
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if (sliceIndex == index) { |
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QPainterPath slicePath; |
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slicePath.moveTo(totalSize/2, totalSize/2); |
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slicePath.arcTo(margin, margin, margin+pieSize, margin+pieSize, |
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startAngle, angle); |
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slicePath.closeSubpath(); |
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return QRegion(slicePath.toFillPolygon().toPolygon()); |
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} |
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startAngle += angle; |
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} |
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} |
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return QRegion(); |
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} |
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int PieView::horizontalOffset() const |
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{ |
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return horizontalScrollBar()->value(); |
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} |
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void PieView::mousePressEvent(QMouseEvent *event) |
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{ |
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QAbstractItemView::mousePressEvent(event); |
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origin = event->pos(); |
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if (!rubberBand) |
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rubberBand = new QRubberBand(QRubberBand::Rectangle, viewport()); |
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rubberBand->setGeometry(QRect(origin, QSize())); |
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259 |
rubberBand->show(); |
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} |
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261 |
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void PieView::mouseMoveEvent(QMouseEvent *event) |
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{ |
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if (rubberBand) |
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rubberBand->setGeometry(QRect(origin, event->pos()).normalized()); |
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QAbstractItemView::mouseMoveEvent(event); |
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} |
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void PieView::mouseReleaseEvent(QMouseEvent *event) |
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{ |
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QAbstractItemView::mouseReleaseEvent(event); |
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if (rubberBand) |
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rubberBand->hide(); |
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viewport()->update(); |
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} |
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QModelIndex PieView::moveCursor(QAbstractItemView::CursorAction cursorAction, |
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Qt::KeyboardModifiers /*modifiers*/) |
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{ |
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QModelIndex current = currentIndex(); |
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281 |
||
282 |
switch (cursorAction) { |
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case MoveLeft: |
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case MoveUp: |
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if (current.row() > 0) |
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current = model()->index(current.row() - 1, current.column(), |
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rootIndex()); |
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else |
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current = model()->index(0, current.column(), rootIndex()); |
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break; |
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case MoveRight: |
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case MoveDown: |
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if (current.row() < rows(current) - 1) |
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current = model()->index(current.row() + 1, current.column(), |
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rootIndex()); |
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else |
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current = model()->index(rows(current) - 1, current.column(), |
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rootIndex()); |
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break; |
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default: |
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break; |
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} |
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viewport()->update(); |
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return current; |
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} |
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void PieView::paintEvent(QPaintEvent *event) |
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{ |
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QItemSelectionModel *selections = selectionModel(); |
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QStyleOptionViewItem option = viewOptions(); |
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QStyle::State state = option.state; |
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313 |
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314 |
QBrush background = option.palette.base(); |
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315 |
QPen foreground(option.palette.color(QPalette::WindowText)); |
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316 |
QPen textPen(option.palette.color(QPalette::Text)); |
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317 |
QPen highlightedPen(option.palette.color(QPalette::HighlightedText)); |
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318 |
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319 |
QPainter painter(viewport()); |
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320 |
painter.setRenderHint(QPainter::Antialiasing); |
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321 |
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322 |
painter.fillRect(event->rect(), background); |
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323 |
painter.setPen(foreground); |
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324 |
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325 |
// Viewport rectangles |
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326 |
QRect pieRect = QRect(margin, margin, pieSize, pieSize); |
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327 |
QPoint keyPoint = QPoint(totalSize - horizontalScrollBar()->value(), |
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328 |
margin - verticalScrollBar()->value()); |
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329 |
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if (validItems > 0) { |
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painter.save(); |
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333 |
painter.translate(pieRect.x() - horizontalScrollBar()->value(), |
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pieRect.y() - verticalScrollBar()->value()); |
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painter.drawEllipse(0, 0, pieSize, pieSize); |
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336 |
double startAngle = 0.0; |
|
337 |
int row; |
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338 |
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339 |
for (row = 0; row < model()->rowCount(rootIndex()); ++row) { |
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340 |
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341 |
QModelIndex index = model()->index(row, 1, rootIndex()); |
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342 |
double value = model()->data(index).toDouble(); |
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343 |
||
344 |
if (value > 0.0) { |
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345 |
double angle = 360*value/totalValue; |
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346 |
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347 |
QModelIndex colorIndex = model()->index(row, 0, rootIndex()); |
|
348 |
QColor color = QColor(model()->data(colorIndex, |
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349 |
Qt::DecorationRole).toString()); |
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350 |
||
351 |
if (currentIndex() == index) |
|
352 |
painter.setBrush(QBrush(color, Qt::Dense4Pattern)); |
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353 |
else if (selections->isSelected(index)) |
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354 |
painter.setBrush(QBrush(color, Qt::Dense3Pattern)); |
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355 |
else |
|
356 |
painter.setBrush(QBrush(color)); |
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357 |
||
358 |
painter.drawPie(0, 0, pieSize, pieSize, int(startAngle*16), |
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359 |
int(angle*16)); |
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360 |
||
361 |
startAngle += angle; |
|
362 |
} |
|
363 |
} |
|
364 |
painter.restore(); |
|
365 |
||
366 |
int keyNumber = 0; |
|
367 |
||
368 |
for (row = 0; row < model()->rowCount(rootIndex()); ++row) { |
|
369 |
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370 |
QModelIndex index = model()->index(row, 1, rootIndex()); |
|
371 |
double value = model()->data(index).toDouble(); |
|
372 |
||
373 |
if (value > 0.0) { |
|
374 |
QModelIndex labelIndex = model()->index(row, 0, rootIndex()); |
|
375 |
||
376 |
QStyleOptionViewItem option = viewOptions(); |
|
377 |
option.rect = visualRect(labelIndex); |
|
378 |
if (selections->isSelected(labelIndex)) |
|
379 |
option.state |= QStyle::State_Selected; |
|
380 |
if (currentIndex() == labelIndex) |
|
381 |
option.state |= QStyle::State_HasFocus; |
|
382 |
itemDelegate()->paint(&painter, option, labelIndex); |
|
383 |
||
384 |
keyNumber++; |
|
385 |
} |
|
386 |
} |
|
387 |
} |
|
388 |
} |
|
389 |
||
390 |
void PieView::resizeEvent(QResizeEvent * /* event */) |
|
391 |
{ |
|
392 |
updateGeometries(); |
|
393 |
} |
|
394 |
||
395 |
int PieView::rows(const QModelIndex &index) const |
|
396 |
{ |
|
397 |
return model()->rowCount(model()->parent(index)); |
|
398 |
} |
|
399 |
||
400 |
void PieView::rowsInserted(const QModelIndex &parent, int start, int end) |
|
401 |
{ |
|
402 |
for (int row = start; row <= end; ++row) { |
|
403 |
||
404 |
QModelIndex index = model()->index(row, 1, rootIndex()); |
|
405 |
double value = model()->data(index).toDouble(); |
|
406 |
||
407 |
if (value > 0.0) { |
|
408 |
totalValue += value; |
|
409 |
validItems++; |
|
410 |
} |
|
411 |
} |
|
412 |
||
413 |
QAbstractItemView::rowsInserted(parent, start, end); |
|
414 |
} |
|
415 |
||
416 |
void PieView::rowsAboutToBeRemoved(const QModelIndex &parent, int start, int end) |
|
417 |
{ |
|
418 |
for (int row = start; row <= end; ++row) { |
|
419 |
||
420 |
QModelIndex index = model()->index(row, 1, rootIndex()); |
|
421 |
double value = model()->data(index).toDouble(); |
|
422 |
if (value > 0.0) { |
|
423 |
totalValue -= value; |
|
424 |
validItems--; |
|
425 |
} |
|
426 |
} |
|
427 |
||
428 |
QAbstractItemView::rowsAboutToBeRemoved(parent, start, end); |
|
429 |
} |
|
430 |
||
431 |
void PieView::scrollContentsBy(int dx, int dy) |
|
432 |
{ |
|
433 |
viewport()->scroll(dx, dy); |
|
434 |
} |
|
435 |
||
436 |
void PieView::scrollTo(const QModelIndex &index, ScrollHint) |
|
437 |
{ |
|
438 |
QRect area = viewport()->rect(); |
|
439 |
QRect rect = visualRect(index); |
|
440 |
||
441 |
if (rect.left() < area.left()) |
|
442 |
horizontalScrollBar()->setValue( |
|
443 |
horizontalScrollBar()->value() + rect.left() - area.left()); |
|
444 |
else if (rect.right() > area.right()) |
|
445 |
horizontalScrollBar()->setValue( |
|
446 |
horizontalScrollBar()->value() + qMin( |
|
447 |
rect.right() - area.right(), rect.left() - area.left())); |
|
448 |
||
449 |
if (rect.top() < area.top()) |
|
450 |
verticalScrollBar()->setValue( |
|
451 |
verticalScrollBar()->value() + rect.top() - area.top()); |
|
452 |
else if (rect.bottom() > area.bottom()) |
|
453 |
verticalScrollBar()->setValue( |
|
454 |
verticalScrollBar()->value() + qMin( |
|
455 |
rect.bottom() - area.bottom(), rect.top() - area.top())); |
|
456 |
||
457 |
update(); |
|
458 |
} |
|
459 |
||
460 |
/* |
|
461 |
Find the indices corresponding to the extent of the selection. |
|
462 |
*/ |
|
463 |
||
464 |
void PieView::setSelection(const QRect &rect, QItemSelectionModel::SelectionFlags command) |
|
465 |
{ |
|
466 |
// Use content widget coordinates because we will use the itemRegion() |
|
467 |
// function to check for intersections. |
|
468 |
||
469 |
QRect contentsRect = rect.translated( |
|
470 |
horizontalScrollBar()->value(), |
|
471 |
verticalScrollBar()->value()).normalized(); |
|
472 |
||
473 |
int rows = model()->rowCount(rootIndex()); |
|
474 |
int columns = model()->columnCount(rootIndex()); |
|
475 |
QModelIndexList indexes; |
|
476 |
||
477 |
for (int row = 0; row < rows; ++row) { |
|
478 |
for (int column = 0; column < columns; ++column) { |
|
479 |
QModelIndex index = model()->index(row, column, rootIndex()); |
|
480 |
QRegion region = itemRegion(index); |
|
481 |
if (!region.intersect(contentsRect).isEmpty()) |
|
482 |
indexes.append(index); |
|
483 |
} |
|
484 |
} |
|
485 |
||
486 |
if (indexes.size() > 0) { |
|
487 |
int firstRow = indexes[0].row(); |
|
488 |
int lastRow = indexes[0].row(); |
|
489 |
int firstColumn = indexes[0].column(); |
|
490 |
int lastColumn = indexes[0].column(); |
|
491 |
||
492 |
for (int i = 1; i < indexes.size(); ++i) { |
|
493 |
firstRow = qMin(firstRow, indexes[i].row()); |
|
494 |
lastRow = qMax(lastRow, indexes[i].row()); |
|
495 |
firstColumn = qMin(firstColumn, indexes[i].column()); |
|
496 |
lastColumn = qMax(lastColumn, indexes[i].column()); |
|
497 |
} |
|
498 |
||
499 |
QItemSelection selection( |
|
500 |
model()->index(firstRow, firstColumn, rootIndex()), |
|
501 |
model()->index(lastRow, lastColumn, rootIndex())); |
|
502 |
selectionModel()->select(selection, command); |
|
503 |
} else { |
|
504 |
QModelIndex noIndex; |
|
505 |
QItemSelection selection(noIndex, noIndex); |
|
506 |
selectionModel()->select(selection, command); |
|
507 |
} |
|
508 |
||
509 |
update(); |
|
510 |
} |
|
511 |
||
512 |
void PieView::updateGeometries() |
|
513 |
{ |
|
514 |
horizontalScrollBar()->setPageStep(viewport()->width()); |
|
515 |
horizontalScrollBar()->setRange(0, qMax(0, 2*totalSize - viewport()->width())); |
|
516 |
verticalScrollBar()->setPageStep(viewport()->height()); |
|
517 |
verticalScrollBar()->setRange(0, qMax(0, totalSize - viewport()->height())); |
|
518 |
} |
|
519 |
||
520 |
int PieView::verticalOffset() const |
|
521 |
{ |
|
522 |
return verticalScrollBar()->value(); |
|
523 |
} |
|
524 |
||
525 |
/* |
|
526 |
Returns the position of the item in viewport coordinates. |
|
527 |
*/ |
|
528 |
||
529 |
QRect PieView::visualRect(const QModelIndex &index) const |
|
530 |
{ |
|
531 |
QRect rect = itemRect(index); |
|
532 |
if (rect.isValid()) |
|
533 |
return QRect(rect.left() - horizontalScrollBar()->value(), |
|
534 |
rect.top() - verticalScrollBar()->value(), |
|
535 |
rect.width(), rect.height()); |
|
536 |
else |
|
537 |
return rect; |
|
538 |
} |
|
539 |
||
540 |
/* |
|
541 |
Returns a region corresponding to the selection in viewport coordinates. |
|
542 |
*/ |
|
543 |
||
544 |
QRegion PieView::visualRegionForSelection(const QItemSelection &selection) const |
|
545 |
{ |
|
546 |
int ranges = selection.count(); |
|
547 |
||
548 |
if (ranges == 0) |
|
549 |
return QRect(); |
|
550 |
||
551 |
QRegion region; |
|
552 |
for (int i = 0; i < ranges; ++i) { |
|
553 |
QItemSelectionRange range = selection.at(i); |
|
554 |
for (int row = range.top(); row <= range.bottom(); ++row) { |
|
555 |
for (int col = range.left(); col <= range.right(); ++col) { |
|
556 |
QModelIndex index = model()->index(row, col, rootIndex()); |
|
557 |
region += visualRect(index); |
|
558 |
} |
|
559 |
} |
|
560 |
} |
|
561 |
return region; |
|
562 |
} |