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Diffstat (limited to 'demos/qtdemo/headingitem.cpp')
-rw-r--r-- | demos/qtdemo/headingitem.cpp | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/demos/qtdemo/headingitem.cpp b/demos/qtdemo/headingitem.cpp new file mode 100644 index 0000000..80a255a --- /dev/null +++ b/demos/qtdemo/headingitem.cpp @@ -0,0 +1,104 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the demonstration applications of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain +** additional rights. These rights are described in the Nokia Qt LGPL +** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this +** package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "headingitem.h" +#include "colors.h" + +HeadingItem::HeadingItem(const QString &text, QGraphicsScene *scene, QGraphicsItem *parent) + : DemoItem(scene, parent) +{ + this->text = text; + this->noSubPixeling = true; +} + +QImage *HeadingItem::createImage(const QMatrix &matrix) const +{ + float sx = qMin(matrix.m11(), matrix.m22()); + float sy = matrix.m22() < sx ? sx : matrix.m22(); + QFontMetrics fm(Colors::headingFont()); + + float w = fm.width(this->text) + 1; + float h = fm.height(); + float xShadow = 3.0f; + float yShadow = 3.0f; + + QImage *image = new QImage(int((w + xShadow) * sx), int((h + yShadow) * sy), QImage::Format_ARGB32_Premultiplied); + image->fill(QColor(0, 0, 0, 0).rgba()); + QPainter painter(image); + painter.setFont(Colors::headingFont()); + painter.scale(sx, sy); + + //draw shadow + QLinearGradient brush_shadow(xShadow, yShadow, w, yShadow); + brush_shadow.setSpread(QLinearGradient::PadSpread); + if (Colors::useEightBitPalette) + brush_shadow.setColorAt(0.0f, QColor(0, 0, 0)); + else + brush_shadow.setColorAt(0.0f, QColor(0, 0, 0, 100)); + QPen pen_shadow; + pen_shadow.setBrush(brush_shadow); + painter.setPen(pen_shadow); + painter.drawText(int(xShadow), int(yShadow), int(w), int(h), Qt::AlignLeft, this->text); + + // draw text + QLinearGradient brush_text(0, 0, w, w); + brush_text.setSpread(QLinearGradient::PadSpread); + brush_text.setColorAt(0.0f, QColor(255, 255, 255)); + brush_text.setColorAt(0.2f, QColor(255, 255, 255)); + brush_text.setColorAt(0.5f, QColor(190, 190, 190)); + QPen pen_text; + pen_text.setBrush(brush_text); + painter.setPen(pen_text); + painter.drawText(0, 0, int(w), int(h), Qt::AlignLeft, this->text); + return image; +} + + +void HeadingItem::animationStarted(int) +{ + this->noSubPixeling = false; +} + + +void HeadingItem::animationStopped(int) +{ + this->noSubPixeling = true; +} |