[2] | 1 | /****************************************************************************
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| 2 | **
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[846] | 3 | ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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[561] | 4 | ** All rights reserved.
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| 5 | ** Contact: Nokia Corporation ([email protected])
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[2] | 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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[846] | 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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[2] | 11 | **
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[846] | 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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[2] | 25 | **
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[846] | 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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[2] | 37 | ** $QT_END_LICENSE$
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| 38 | **
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| 39 | ****************************************************************************/
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| 40 |
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| 41 | #include <QtGui>
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| 42 | #include <math.h>
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| 43 |
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| 44 | #include "starrating.h"
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| 45 |
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| 46 | const int PaintingScaleFactor = 20;
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| 47 |
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| 48 | //! [0]
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| 49 | StarRating::StarRating(int starCount, int maxStarCount)
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| 50 | {
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| 51 | myStarCount = starCount;
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| 52 | myMaxStarCount = maxStarCount;
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| 53 |
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| 54 | starPolygon << QPointF(1.0, 0.5);
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| 55 | for (int i = 1; i < 5; ++i)
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| 56 | starPolygon << QPointF(0.5 + 0.5 * cos(0.8 * i * 3.14),
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| 57 | 0.5 + 0.5 * sin(0.8 * i * 3.14));
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| 58 |
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| 59 | diamondPolygon << QPointF(0.4, 0.5) << QPointF(0.5, 0.4)
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| 60 | << QPointF(0.6, 0.5) << QPointF(0.5, 0.6)
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| 61 | << QPointF(0.4, 0.5);
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| 62 | }
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| 63 | //! [0]
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| 64 |
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| 65 | //! [1]
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| 66 | QSize StarRating::sizeHint() const
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| 67 | {
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| 68 | return PaintingScaleFactor * QSize(myMaxStarCount, 1);
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| 69 | }
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| 70 | //! [1]
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| 71 |
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| 72 | //! [2]
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| 73 | void StarRating::paint(QPainter *painter, const QRect &rect,
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| 74 | const QPalette &palette, EditMode mode) const
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| 75 | {
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| 76 | painter->save();
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| 77 |
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| 78 | painter->setRenderHint(QPainter::Antialiasing, true);
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| 79 | painter->setPen(Qt::NoPen);
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| 80 |
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| 81 | if (mode == Editable) {
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| 82 | painter->setBrush(palette.highlight());
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| 83 | } else {
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| 84 | painter->setBrush(palette.foreground());
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| 85 | }
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| 86 |
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| 87 | int yOffset = (rect.height() - PaintingScaleFactor) / 2;
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| 88 | painter->translate(rect.x(), rect.y() + yOffset);
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| 89 | painter->scale(PaintingScaleFactor, PaintingScaleFactor);
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| 90 |
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| 91 | for (int i = 0; i < myMaxStarCount; ++i) {
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| 92 | if (i < myStarCount) {
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| 93 | painter->drawPolygon(starPolygon, Qt::WindingFill);
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| 94 | } else if (mode == Editable) {
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| 95 | painter->drawPolygon(diamondPolygon, Qt::WindingFill);
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| 96 | }
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| 97 | painter->translate(1.0, 0.0);
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| 98 | }
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| 99 |
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| 100 | painter->restore();
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| 101 | }
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| 102 | //! [2]
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