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Diffstat (limited to 'examples/painting/gradients/gradients.cpp')
-rw-r--r-- | examples/painting/gradients/gradients.cpp | 516 |
1 files changed, 0 insertions, 516 deletions
diff --git a/examples/painting/gradients/gradients.cpp b/examples/painting/gradients/gradients.cpp deleted file mode 100644 index 9dad51a8e4..0000000000 --- a/examples/painting/gradients/gradients.cpp +++ /dev/null @@ -1,516 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). -** Contact: http://www.qt-project.org/ -** -** This file is part of the demonstration applications of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** GNU Lesser General Public License Usage -** 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 1.1, 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. -** -** Other Usage -** Alternatively, this file may be used in accordance with the terms and -** conditions contained in a signed written agreement between you and Nokia. -** -** -** -** -** -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include "gradients.h" -#include "hoverpoints.h" - -ShadeWidget::ShadeWidget(ShadeType type, QWidget *parent) - : QWidget(parent), m_shade_type(type), m_alpha_gradient(QLinearGradient(0, 0, 0, 0)) -{ - - // Checkers background - if (m_shade_type == ARGBShade) { - QPixmap pm(20, 20); - QPainter pmp(&pm); - pmp.fillRect(0, 0, 10, 10, Qt::lightGray); - pmp.fillRect(10, 10, 10, 10, Qt::lightGray); - pmp.fillRect(0, 10, 10, 10, Qt::darkGray); - pmp.fillRect(10, 0, 10, 10, Qt::darkGray); - pmp.end(); - QPalette pal = palette(); - pal.setBrush(backgroundRole(), QBrush(pm)); - setAutoFillBackground(true); - setPalette(pal); - - } else { - setAttribute(Qt::WA_NoBackground); - - } - - QPolygonF points; - points << QPointF(0, sizeHint().height()) - << QPointF(sizeHint().width(), 0); - - m_hoverPoints = new HoverPoints(this, HoverPoints::CircleShape); -// m_hoverPoints->setConnectionType(HoverPoints::LineConnection); - m_hoverPoints->setPoints(points); - m_hoverPoints->setPointLock(0, HoverPoints::LockToLeft); - m_hoverPoints->setPointLock(1, HoverPoints::LockToRight); - m_hoverPoints->setSortType(HoverPoints::XSort); - - setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed); - - connect(m_hoverPoints, SIGNAL(pointsChanged(QPolygonF)), this, SIGNAL(colorsChanged())); -} - - -QPolygonF ShadeWidget::points() const -{ - return m_hoverPoints->points(); -} - - -uint ShadeWidget::colorAt(int x) -{ - generateShade(); - - QPolygonF pts = m_hoverPoints->points(); - for (int i=1; i < pts.size(); ++i) { - if (pts.at(i-1).x() <= x && pts.at(i).x() >= x) { - QLineF l(pts.at(i-1), pts.at(i)); - l.setLength(l.length() * ((x - l.x1()) / l.dx())); - return m_shade.pixel(qRound(qMin(l.x2(), (qreal(m_shade.width() - 1)))), - qRound(qMin(l.y2(), qreal(m_shade.height() - 1)))); - } - } - return 0; -} - - -void ShadeWidget::setGradientStops(const QGradientStops &stops) -{ - if (m_shade_type == ARGBShade) { - m_alpha_gradient = QLinearGradient(0, 0, width(), 0); - - for (int i=0; i<stops.size(); ++i) { - QColor c = stops.at(i).second; - m_alpha_gradient.setColorAt(stops.at(i).first, QColor(c.red(), c.green(), c.blue())); - } - - m_shade = QImage(); - generateShade(); - update(); - } -} - - -void ShadeWidget::paintEvent(QPaintEvent *) -{ - generateShade(); - - QPainter p(this); - p.drawImage(0, 0, m_shade); - - p.setPen(QColor(146, 146, 146)); - p.drawRect(0, 0, width() - 1, height() - 1); -} - - -void ShadeWidget::generateShade() -{ - if (m_shade.isNull() || m_shade.size() != size()) { - - if (m_shade_type == ARGBShade) { - m_shade = QImage(size(), QImage::Format_ARGB32_Premultiplied); - m_shade.fill(0); - - QPainter p(&m_shade); - p.fillRect(rect(), m_alpha_gradient); - - p.setCompositionMode(QPainter::CompositionMode_DestinationIn); - QLinearGradient fade(0, 0, 0, height()); - fade.setColorAt(0, QColor(0, 0, 0, 255)); - fade.setColorAt(1, QColor(0, 0, 0, 0)); - p.fillRect(rect(), fade); - - } else { - m_shade = QImage(size(), QImage::Format_RGB32); - QLinearGradient shade(0, 0, 0, height()); - shade.setColorAt(1, Qt::black); - - if (m_shade_type == RedShade) - shade.setColorAt(0, Qt::red); - else if (m_shade_type == GreenShade) - shade.setColorAt(0, Qt::green); - else - shade.setColorAt(0, Qt::blue); - - QPainter p(&m_shade); - p.fillRect(rect(), shade); - } - } - - -} - - -GradientEditor::GradientEditor(QWidget *parent) - : QWidget(parent) -{ - QVBoxLayout *vbox = new QVBoxLayout(this); - vbox->setSpacing(1); - vbox->setMargin(1); - - m_red_shade = new ShadeWidget(ShadeWidget::RedShade, this); - m_green_shade = new ShadeWidget(ShadeWidget::GreenShade, this); - m_blue_shade = new ShadeWidget(ShadeWidget::BlueShade, this); - m_alpha_shade = new ShadeWidget(ShadeWidget::ARGBShade, this); - - vbox->addWidget(m_red_shade); - vbox->addWidget(m_green_shade); - vbox->addWidget(m_blue_shade); - vbox->addWidget(m_alpha_shade); - - connect(m_red_shade, SIGNAL(colorsChanged()), this, SLOT(pointsUpdated())); - connect(m_green_shade, SIGNAL(colorsChanged()), this, SLOT(pointsUpdated())); - connect(m_blue_shade, SIGNAL(colorsChanged()), this, SLOT(pointsUpdated())); - connect(m_alpha_shade, SIGNAL(colorsChanged()), this, SLOT(pointsUpdated())); -} - - -inline static bool x_less_than(const QPointF &p1, const QPointF &p2) -{ - return p1.x() < p2.x(); -} - - -void GradientEditor::pointsUpdated() -{ - qreal w = m_alpha_shade->width(); - - QGradientStops stops; - - QPolygonF points; - - points += m_red_shade->points(); - points += m_green_shade->points(); - points += m_blue_shade->points(); - points += m_alpha_shade->points(); - - qSort(points.begin(), points.end(), x_less_than); - - for (int i=0; i<points.size(); ++i) { - qreal x = int(points.at(i).x()); - if (i+1 < points.size() && x == points.at(i+1).x()) - continue; - QColor color((0x00ff0000 & m_red_shade->colorAt(int(x))) >> 16, - (0x0000ff00 & m_green_shade->colorAt(int(x))) >> 8, - (0x000000ff & m_blue_shade->colorAt(int(x))), - (0xff000000 & m_alpha_shade->colorAt(int(x))) >> 24); - - if (x / w > 1) - return; - - stops << QGradientStop(x / w, color); - } - - m_alpha_shade->setGradientStops(stops); - - emit gradientStopsChanged(stops); -} - - -static void set_shade_points(const QPolygonF &points, ShadeWidget *shade) -{ - shade->hoverPoints()->setPoints(points); - shade->hoverPoints()->setPointLock(0, HoverPoints::LockToLeft); - shade->hoverPoints()->setPointLock(points.size() - 1, HoverPoints::LockToRight); - shade->update(); -} - -void GradientEditor::setGradientStops(const QGradientStops &stops) -{ - QPolygonF pts_red, pts_green, pts_blue, pts_alpha; - - qreal h_red = m_red_shade->height(); - qreal h_green = m_green_shade->height(); - qreal h_blue = m_blue_shade->height(); - qreal h_alpha = m_alpha_shade->height(); - - for (int i=0; i<stops.size(); ++i) { - qreal pos = stops.at(i).first; - QRgb color = stops.at(i).second.rgba(); - pts_red << QPointF(pos * m_red_shade->width(), h_red - qRed(color) * h_red / 255); - pts_green << QPointF(pos * m_green_shade->width(), h_green - qGreen(color) * h_green / 255); - pts_blue << QPointF(pos * m_blue_shade->width(), h_blue - qBlue(color) * h_blue / 255); - pts_alpha << QPointF(pos * m_alpha_shade->width(), h_alpha - qAlpha(color) * h_alpha / 255); - } - - set_shade_points(pts_red, m_red_shade); - set_shade_points(pts_green, m_green_shade); - set_shade_points(pts_blue, m_blue_shade); - set_shade_points(pts_alpha, m_alpha_shade); - -} - -GradientWidget::GradientWidget(QWidget *parent) - : QWidget(parent) -{ - setWindowTitle(tr("Gradients")); - - m_renderer = new GradientRenderer(this); - - QGroupBox *mainGroup = new QGroupBox(this); - mainGroup->setTitle(tr("Gradients")); - - QGroupBox *editorGroup = new QGroupBox(mainGroup); - editorGroup->setTitle(tr("Color Editor")); - m_editor = new GradientEditor(editorGroup); - - QGroupBox *typeGroup = new QGroupBox(mainGroup); - typeGroup->setTitle(tr("Gradient Type")); - m_linearButton = new QRadioButton(tr("Linear Gradient"), typeGroup); - m_radialButton = new QRadioButton(tr("Radial Gradient"), typeGroup); - m_conicalButton = new QRadioButton(tr("Conical Gradient"), typeGroup); - - QGroupBox *spreadGroup = new QGroupBox(mainGroup); - spreadGroup->setTitle(tr("Spread Method")); - m_padSpreadButton = new QRadioButton(tr("Pad Spread"), spreadGroup); - m_reflectSpreadButton = new QRadioButton(tr("Reflect Spread"), spreadGroup); - m_repeatSpreadButton = new QRadioButton(tr("Repeat Spread"), spreadGroup); - - QGroupBox *defaultsGroup = new QGroupBox(mainGroup); - defaultsGroup->setTitle(tr("Defaults")); - QPushButton *default1Button = new QPushButton(tr("1"), defaultsGroup); - QPushButton *default2Button = new QPushButton(tr("2"), defaultsGroup); - QPushButton *default3Button = new QPushButton(tr("3"), defaultsGroup); - QPushButton *default4Button = new QPushButton(tr("Reset"), editorGroup); - - QPushButton *showSourceButton = new QPushButton(mainGroup); - showSourceButton->setText(tr("Show Source")); -#ifdef QT_OPENGL_SUPPORT - QPushButton *enableOpenGLButton = new QPushButton(mainGroup); - enableOpenGLButton->setText(tr("Use OpenGL")); - enableOpenGLButton->setCheckable(true); - enableOpenGLButton->setChecked(m_renderer->usesOpenGL()); - if (!QGLFormat::hasOpenGL()) - enableOpenGLButton->hide(); -#endif - QPushButton *whatsThisButton = new QPushButton(mainGroup); - whatsThisButton->setText(tr("What's This?")); - whatsThisButton->setCheckable(true); - - // Layouts - QHBoxLayout *mainLayout = new QHBoxLayout(this); - mainLayout->addWidget(m_renderer); - mainLayout->addWidget(mainGroup); - - mainGroup->setFixedWidth(180); - QVBoxLayout *mainGroupLayout = new QVBoxLayout(mainGroup); - mainGroupLayout->addWidget(editorGroup); - mainGroupLayout->addWidget(typeGroup); - mainGroupLayout->addWidget(spreadGroup); - mainGroupLayout->addWidget(defaultsGroup); - mainGroupLayout->addStretch(1); - mainGroupLayout->addWidget(showSourceButton); -#ifdef QT_OPENGL_SUPPORT - mainGroupLayout->addWidget(enableOpenGLButton); -#endif - mainGroupLayout->addWidget(whatsThisButton); - - QVBoxLayout *editorGroupLayout = new QVBoxLayout(editorGroup); - editorGroupLayout->addWidget(m_editor); - - QVBoxLayout *typeGroupLayout = new QVBoxLayout(typeGroup); - typeGroupLayout->addWidget(m_linearButton); - typeGroupLayout->addWidget(m_radialButton); - typeGroupLayout->addWidget(m_conicalButton); - - QVBoxLayout *spreadGroupLayout = new QVBoxLayout(spreadGroup); - spreadGroupLayout->addWidget(m_padSpreadButton); - spreadGroupLayout->addWidget(m_repeatSpreadButton); - spreadGroupLayout->addWidget(m_reflectSpreadButton); - - QHBoxLayout *defaultsGroupLayout = new QHBoxLayout(defaultsGroup); - defaultsGroupLayout->addWidget(default1Button); - defaultsGroupLayout->addWidget(default2Button); - defaultsGroupLayout->addWidget(default3Button); - editorGroupLayout->addWidget(default4Button); - - connect(m_editor, SIGNAL(gradientStopsChanged(QGradientStops)), - m_renderer, SLOT(setGradientStops(QGradientStops))); - - connect(m_linearButton, SIGNAL(clicked()), m_renderer, SLOT(setLinearGradient())); - connect(m_radialButton, SIGNAL(clicked()), m_renderer, SLOT(setRadialGradient())); - connect(m_conicalButton, SIGNAL(clicked()), m_renderer, SLOT(setConicalGradient())); - - connect(m_padSpreadButton, SIGNAL(clicked()), m_renderer, SLOT(setPadSpread())); - connect(m_reflectSpreadButton, SIGNAL(clicked()), m_renderer, SLOT(setReflectSpread())); - connect(m_repeatSpreadButton, SIGNAL(clicked()), m_renderer, SLOT(setRepeatSpread())); - - connect(default1Button, SIGNAL(clicked()), this, SLOT(setDefault1())); - connect(default2Button, SIGNAL(clicked()), this, SLOT(setDefault2())); - connect(default3Button, SIGNAL(clicked()), this, SLOT(setDefault3())); - connect(default4Button, SIGNAL(clicked()), this, SLOT(setDefault4())); - - connect(showSourceButton, SIGNAL(clicked()), m_renderer, SLOT(showSource())); -#ifdef QT_OPENGL_SUPPORT - connect(enableOpenGLButton, SIGNAL(clicked(bool)), m_renderer, SLOT(enableOpenGL(bool))); -#endif - connect(whatsThisButton, SIGNAL(clicked(bool)), m_renderer, SLOT(setDescriptionEnabled(bool))); - connect(whatsThisButton, SIGNAL(clicked(bool)), - m_renderer->hoverPoints(), SLOT(setDisabled(bool))); - connect(m_renderer, SIGNAL(descriptionEnabledChanged(bool)), - whatsThisButton, SLOT(setChecked(bool))); - connect(m_renderer, SIGNAL(descriptionEnabledChanged(bool)), - m_renderer->hoverPoints(), SLOT(setDisabled(bool))); - - m_renderer->loadSourceFile(":res/gradients/gradients.cpp"); - m_renderer->loadDescription(":res/gradients/gradients.html"); - - QTimer::singleShot(50, this, SLOT(setDefault1())); -} - -void GradientWidget::setDefault(int config) -{ - QGradientStops stops; - QPolygonF points; - switch (config) { - case 1: - stops << QGradientStop(0.00, QColor::fromRgba(0)); - stops << QGradientStop(0.04, QColor::fromRgba(0xff131360)); - stops << QGradientStop(0.08, QColor::fromRgba(0xff202ccc)); - stops << QGradientStop(0.42, QColor::fromRgba(0xff93d3f9)); - stops << QGradientStop(0.51, QColor::fromRgba(0xffb3e6ff)); - stops << QGradientStop(0.73, QColor::fromRgba(0xffffffec)); - stops << QGradientStop(0.92, QColor::fromRgba(0xff5353d9)); - stops << QGradientStop(0.96, QColor::fromRgba(0xff262666)); - stops << QGradientStop(1.00, QColor::fromRgba(0)); - m_linearButton->animateClick(); - m_repeatSpreadButton->animateClick(); - break; - - case 2: - stops << QGradientStop(0.00, QColor::fromRgba(0xffffffff)); - stops << QGradientStop(0.11, QColor::fromRgba(0xfff9ffa0)); - stops << QGradientStop(0.13, QColor::fromRgba(0xfff9ff99)); - stops << QGradientStop(0.14, QColor::fromRgba(0xfff3ff86)); - stops << QGradientStop(0.49, QColor::fromRgba(0xff93b353)); - stops << QGradientStop(0.87, QColor::fromRgba(0xff264619)); - stops << QGradientStop(0.96, QColor::fromRgba(0xff0c1306)); - stops << QGradientStop(1.00, QColor::fromRgba(0)); - m_radialButton->animateClick(); - m_padSpreadButton->animateClick(); - break; - - case 3: - stops << QGradientStop(0.00, QColor::fromRgba(0)); - stops << QGradientStop(0.10, QColor::fromRgba(0xffe0cc73)); - stops << QGradientStop(0.17, QColor::fromRgba(0xffc6a006)); - stops << QGradientStop(0.46, QColor::fromRgba(0xff600659)); - stops << QGradientStop(0.72, QColor::fromRgba(0xff0680ac)); - stops << QGradientStop(0.92, QColor::fromRgba(0xffb9d9e6)); - stops << QGradientStop(1.00, QColor::fromRgba(0)); - m_conicalButton->animateClick(); - m_padSpreadButton->animateClick(); - break; - - case 4: - stops << QGradientStop(0.00, QColor::fromRgba(0xff000000)); - stops << QGradientStop(1.00, QColor::fromRgba(0xffffffff)); - break; - - default: - qWarning("bad default: %d\n", config); - break; - } - - QPolygonF pts; - int h_off = m_renderer->width() / 10; - int v_off = m_renderer->height() / 8; - pts << QPointF(m_renderer->width() / 2, m_renderer->height() / 2) - << QPointF(m_renderer->width() / 2 - h_off, m_renderer->height() / 2 - v_off); - - m_editor->setGradientStops(stops); - m_renderer->hoverPoints()->setPoints(pts); - m_renderer->setGradientStops(stops); -} - - -GradientRenderer::GradientRenderer(QWidget *parent) - : ArthurFrame(parent) -{ - m_hoverPoints = new HoverPoints(this, HoverPoints::CircleShape); - m_hoverPoints->setPointSize(QSize(20, 20)); - m_hoverPoints->setConnectionType(HoverPoints::NoConnection); - m_hoverPoints->setEditable(false); - - QVector<QPointF> points; - points << QPointF(100, 100) << QPointF(200, 200); - m_hoverPoints->setPoints(points); - - m_spread = QGradient::PadSpread; - m_gradientType = Qt::LinearGradientPattern; -} - -void GradientRenderer::setGradientStops(const QGradientStops &stops) -{ - m_stops = stops; - update(); -} - - -void GradientRenderer::mousePressEvent(QMouseEvent *) -{ - setDescriptionEnabled(false); -} - -void GradientRenderer::paint(QPainter *p) -{ - QPolygonF pts = m_hoverPoints->points(); - - QGradient g; - - if (m_gradientType == Qt::LinearGradientPattern) { - g = QLinearGradient(pts.at(0), pts.at(1)); - - } else if (m_gradientType == Qt::RadialGradientPattern) { - g = QRadialGradient(pts.at(0), qMin(width(), height()) / 3.0, pts.at(1)); - - } else { - QLineF l(pts.at(0), pts.at(1)); - qreal angle = l.angle(QLineF(0, 0, 1, 0)); - if (l.dy() > 0) - angle = 360 - angle; - g = QConicalGradient(pts.at(0), angle); - } - - for (int i=0; i<m_stops.size(); ++i) - g.setColorAt(m_stops.at(i).first, m_stops.at(i).second); - - g.setSpread(m_spread); - - p->setBrush(g); - p->setPen(Qt::NoPen); - - p->drawRect(rect()); - -} |