503 lines
18 KiB
C++
503 lines
18 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/legal
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**
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** This file is part of the demonstration applications of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Digia. For licensing terms and
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** conditions see http://qt.digia.com/licensing. For further information
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** use the contact form at http://qt.digia.com/contact-us.
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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, Digia gives you certain additional
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** rights. These rights are described in the Digia 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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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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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 "gradients.h"
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#include "hoverpoints.h"
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ShadeWidget::ShadeWidget(ShadeType type, QWidget *parent)
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: QWidget(parent), m_shade_type(type), m_alpha_gradient(QLinearGradient(0, 0, 0, 0))
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{
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// Checkers background
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if (m_shade_type == ARGBShade) {
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QPixmap pm(20, 20);
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QPainter pmp(&pm);
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pmp.fillRect(0, 0, 10, 10, Qt::lightGray);
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pmp.fillRect(10, 10, 10, 10, Qt::lightGray);
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pmp.fillRect(0, 10, 10, 10, Qt::darkGray);
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pmp.fillRect(10, 0, 10, 10, Qt::darkGray);
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pmp.end();
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QPalette pal = palette();
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pal.setBrush(backgroundRole(), QBrush(pm));
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setAutoFillBackground(true);
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setPalette(pal);
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} else {
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setAttribute(Qt::WA_NoBackground);
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}
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QPolygonF points;
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points << QPointF(0, sizeHint().height())
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<< QPointF(sizeHint().width(), 0);
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m_hoverPoints = new HoverPoints(this, HoverPoints::CircleShape);
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// m_hoverPoints->setConnectionType(HoverPoints::LineConnection);
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m_hoverPoints->setPoints(points);
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m_hoverPoints->setPointLock(0, HoverPoints::LockToLeft);
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m_hoverPoints->setPointLock(1, HoverPoints::LockToRight);
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m_hoverPoints->setSortType(HoverPoints::XSort);
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setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
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connect(m_hoverPoints, SIGNAL(pointsChanged(QPolygonF)), this, SIGNAL(colorsChanged()));
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}
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QPolygonF ShadeWidget::points() const
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{
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return m_hoverPoints->points();
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}
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uint ShadeWidget::colorAt(int x)
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{
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generateShade();
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QPolygonF pts = m_hoverPoints->points();
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for (int i=1; i < pts.size(); ++i) {
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if (pts.at(i-1).x() <= x && pts.at(i).x() >= x) {
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QLineF l(pts.at(i-1), pts.at(i));
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l.setLength(l.length() * ((x - l.x1()) / l.dx()));
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return m_shade.pixel(qRound(qMin(l.x2(), (qreal(m_shade.width() - 1)))),
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qRound(qMin(l.y2(), qreal(m_shade.height() - 1))));
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}
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}
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return 0;
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}
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void ShadeWidget::setGradientStops(const QGradientStops &stops)
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{
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if (m_shade_type == ARGBShade) {
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m_alpha_gradient = QLinearGradient(0, 0, width(), 0);
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for (int i=0; i<stops.size(); ++i) {
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QColor c = stops.at(i).second;
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m_alpha_gradient.setColorAt(stops.at(i).first, QColor(c.red(), c.green(), c.blue()));
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}
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m_shade = QImage();
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generateShade();
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update();
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}
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}
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void ShadeWidget::paintEvent(QPaintEvent *)
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{
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generateShade();
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QPainter p(this);
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p.drawImage(0, 0, m_shade);
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p.setPen(QColor(146, 146, 146));
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p.drawRect(0, 0, width() - 1, height() - 1);
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}
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void ShadeWidget::generateShade()
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{
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if (m_shade.isNull() || m_shade.size() != size()) {
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if (m_shade_type == ARGBShade) {
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m_shade = QImage(size(), QImage::Format_ARGB32_Premultiplied);
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m_shade.fill(0);
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QPainter p(&m_shade);
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p.fillRect(rect(), m_alpha_gradient);
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p.setCompositionMode(QPainter::CompositionMode_DestinationIn);
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QLinearGradient fade(0, 0, 0, height());
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fade.setColorAt(0, QColor(0, 0, 0, 255));
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fade.setColorAt(1, QColor(0, 0, 0, 0));
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p.fillRect(rect(), fade);
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} else {
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m_shade = QImage(size(), QImage::Format_RGB32);
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QLinearGradient shade(0, 0, 0, height());
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shade.setColorAt(1, Qt::black);
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if (m_shade_type == RedShade)
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shade.setColorAt(0, Qt::red);
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else if (m_shade_type == GreenShade)
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shade.setColorAt(0, Qt::green);
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else
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shade.setColorAt(0, Qt::blue);
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QPainter p(&m_shade);
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p.fillRect(rect(), shade);
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}
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}
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}
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GradientEditor::GradientEditor(QWidget *parent)
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: QWidget(parent)
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{
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QVBoxLayout *vbox = new QVBoxLayout(this);
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vbox->setSpacing(1);
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vbox->setMargin(1);
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m_red_shade = new ShadeWidget(ShadeWidget::RedShade, this);
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m_green_shade = new ShadeWidget(ShadeWidget::GreenShade, this);
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m_blue_shade = new ShadeWidget(ShadeWidget::BlueShade, this);
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m_alpha_shade = new ShadeWidget(ShadeWidget::ARGBShade, this);
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vbox->addWidget(m_red_shade);
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vbox->addWidget(m_green_shade);
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vbox->addWidget(m_blue_shade);
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vbox->addWidget(m_alpha_shade);
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connect(m_red_shade, SIGNAL(colorsChanged()), this, SLOT(pointsUpdated()));
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connect(m_green_shade, SIGNAL(colorsChanged()), this, SLOT(pointsUpdated()));
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connect(m_blue_shade, SIGNAL(colorsChanged()), this, SLOT(pointsUpdated()));
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connect(m_alpha_shade, SIGNAL(colorsChanged()), this, SLOT(pointsUpdated()));
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}
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inline static bool x_less_than(const QPointF &p1, const QPointF &p2)
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{
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return p1.x() < p2.x();
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}
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void GradientEditor::pointsUpdated()
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{
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qreal w = m_alpha_shade->width();
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QGradientStops stops;
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QPolygonF points;
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points += m_red_shade->points();
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points += m_green_shade->points();
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points += m_blue_shade->points();
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points += m_alpha_shade->points();
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qSort(points.begin(), points.end(), x_less_than);
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for (int i = 0; i < points.size(); ++i) {
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qreal x = int(points.at(i).x());
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if (i + 1 < points.size() && x == points.at(i + 1).x())
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continue;
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QColor color((0x00ff0000 & m_red_shade->colorAt(int(x))) >> 16,
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(0x0000ff00 & m_green_shade->colorAt(int(x))) >> 8,
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(0x000000ff & m_blue_shade->colorAt(int(x))),
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(0xff000000 & m_alpha_shade->colorAt(int(x))) >> 24);
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if (x / w > 1)
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return;
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stops << QGradientStop(x / w, color);
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}
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m_alpha_shade->setGradientStops(stops);
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emit gradientStopsChanged(stops);
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}
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static void set_shade_points(const QPolygonF &points, ShadeWidget *shade)
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{
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shade->hoverPoints()->setPoints(points);
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shade->hoverPoints()->setPointLock(0, HoverPoints::LockToLeft);
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shade->hoverPoints()->setPointLock(points.size() - 1, HoverPoints::LockToRight);
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shade->update();
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}
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void GradientEditor::setGradientStops(const QGradientStops &stops)
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{
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QPolygonF pts_red, pts_green, pts_blue, pts_alpha;
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qreal h_red = m_red_shade->height();
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qreal h_green = m_green_shade->height();
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qreal h_blue = m_blue_shade->height();
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qreal h_alpha = m_alpha_shade->height();
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for (int i = 0; i < stops.size(); ++i) {
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qreal pos = stops.at(i).first;
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QRgb color = stops.at(i).second.rgba();
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pts_red << QPointF(pos * m_red_shade->width(), h_red - qRed(color) * h_red / 255);
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pts_green << QPointF(pos * m_green_shade->width(), h_green - qGreen(color) * h_green / 255);
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pts_blue << QPointF(pos * m_blue_shade->width(), h_blue - qBlue(color) * h_blue / 255);
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pts_alpha << QPointF(pos * m_alpha_shade->width(), h_alpha - qAlpha(color) * h_alpha / 255);
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}
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set_shade_points(pts_red, m_red_shade);
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set_shade_points(pts_green, m_green_shade);
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set_shade_points(pts_blue, m_blue_shade);
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set_shade_points(pts_alpha, m_alpha_shade);
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}
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GradientWidget::GradientWidget(QWidget *parent)
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: QWidget(parent)
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{
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setWindowTitle(tr("Gradients"));
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m_renderer = new GradientRenderer(this);
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QGroupBox *mainGroup = new QGroupBox(this);
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mainGroup->setTitle(tr("Gradients"));
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QGroupBox *editorGroup = new QGroupBox(mainGroup);
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editorGroup->setTitle(tr("Color Editor"));
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m_editor = new GradientEditor(editorGroup);
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QGroupBox *typeGroup = new QGroupBox(mainGroup);
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typeGroup->setTitle(tr("Gradient Type"));
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m_linearButton = new QRadioButton(tr("Linear Gradient"), typeGroup);
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m_radialButton = new QRadioButton(tr("Radial Gradient"), typeGroup);
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m_conicalButton = new QRadioButton(tr("Conical Gradient"), typeGroup);
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QGroupBox *spreadGroup = new QGroupBox(mainGroup);
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spreadGroup->setTitle(tr("Spread Method"));
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m_padSpreadButton = new QRadioButton(tr("Pad Spread"), spreadGroup);
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m_reflectSpreadButton = new QRadioButton(tr("Reflect Spread"), spreadGroup);
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m_repeatSpreadButton = new QRadioButton(tr("Repeat Spread"), spreadGroup);
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QGroupBox *defaultsGroup = new QGroupBox(mainGroup);
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defaultsGroup->setTitle(tr("Defaults"));
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QPushButton *default1Button = new QPushButton(tr("1"), defaultsGroup);
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QPushButton *default2Button = new QPushButton(tr("2"), defaultsGroup);
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QPushButton *default3Button = new QPushButton(tr("3"), defaultsGroup);
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QPushButton *default4Button = new QPushButton(tr("Reset"), editorGroup);
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QPushButton *showSourceButton = new QPushButton(mainGroup);
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showSourceButton->setText(tr("Show Source"));
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#ifdef QT_OPENGL_SUPPORT
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QPushButton *enableOpenGLButton = new QPushButton(mainGroup);
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enableOpenGLButton->setText(tr("Use OpenGL"));
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enableOpenGLButton->setCheckable(true);
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enableOpenGLButton->setChecked(m_renderer->usesOpenGL());
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if (!QGLFormat::hasOpenGL())
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enableOpenGLButton->hide();
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#endif
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QPushButton *whatsThisButton = new QPushButton(mainGroup);
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whatsThisButton->setText(tr("What's This?"));
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whatsThisButton->setCheckable(true);
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// Layouts
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QHBoxLayout *mainLayout = new QHBoxLayout(this);
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mainLayout->addWidget(m_renderer);
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mainLayout->addWidget(mainGroup);
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mainGroup->setFixedWidth(180);
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QVBoxLayout *mainGroupLayout = new QVBoxLayout(mainGroup);
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mainGroupLayout->addWidget(editorGroup);
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mainGroupLayout->addWidget(typeGroup);
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mainGroupLayout->addWidget(spreadGroup);
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mainGroupLayout->addWidget(defaultsGroup);
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mainGroupLayout->addStretch(1);
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mainGroupLayout->addWidget(showSourceButton);
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#ifdef QT_OPENGL_SUPPORT
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mainGroupLayout->addWidget(enableOpenGLButton);
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#endif
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mainGroupLayout->addWidget(whatsThisButton);
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QVBoxLayout *editorGroupLayout = new QVBoxLayout(editorGroup);
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editorGroupLayout->addWidget(m_editor);
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QVBoxLayout *typeGroupLayout = new QVBoxLayout(typeGroup);
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typeGroupLayout->addWidget(m_linearButton);
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typeGroupLayout->addWidget(m_radialButton);
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typeGroupLayout->addWidget(m_conicalButton);
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QVBoxLayout *spreadGroupLayout = new QVBoxLayout(spreadGroup);
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spreadGroupLayout->addWidget(m_padSpreadButton);
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spreadGroupLayout->addWidget(m_repeatSpreadButton);
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spreadGroupLayout->addWidget(m_reflectSpreadButton);
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QHBoxLayout *defaultsGroupLayout = new QHBoxLayout(defaultsGroup);
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defaultsGroupLayout->addWidget(default1Button);
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defaultsGroupLayout->addWidget(default2Button);
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defaultsGroupLayout->addWidget(default3Button);
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editorGroupLayout->addWidget(default4Button);
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connect(m_editor, SIGNAL(gradientStopsChanged(QGradientStops)),
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m_renderer, SLOT(setGradientStops(QGradientStops)));
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connect(m_linearButton, SIGNAL(clicked()), m_renderer, SLOT(setLinearGradient()));
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connect(m_radialButton, SIGNAL(clicked()), m_renderer, SLOT(setRadialGradient()));
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connect(m_conicalButton, SIGNAL(clicked()), m_renderer, SLOT(setConicalGradient()));
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connect(m_padSpreadButton, SIGNAL(clicked()), m_renderer, SLOT(setPadSpread()));
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connect(m_reflectSpreadButton, SIGNAL(clicked()), m_renderer, SLOT(setReflectSpread()));
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connect(m_repeatSpreadButton, SIGNAL(clicked()), m_renderer, SLOT(setRepeatSpread()));
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connect(default1Button, SIGNAL(clicked()), this, SLOT(setDefault1()));
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connect(default2Button, SIGNAL(clicked()), this, SLOT(setDefault2()));
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connect(default3Button, SIGNAL(clicked()), this, SLOT(setDefault3()));
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connect(default4Button, SIGNAL(clicked()), this, SLOT(setDefault4()));
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connect(showSourceButton, SIGNAL(clicked()), m_renderer, SLOT(showSource()));
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#ifdef QT_OPENGL_SUPPORT
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connect(enableOpenGLButton, SIGNAL(clicked(bool)), m_renderer, SLOT(enableOpenGL(bool)));
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#endif
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connect(whatsThisButton, SIGNAL(clicked(bool)), m_renderer, SLOT(setDescriptionEnabled(bool)));
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connect(whatsThisButton, SIGNAL(clicked(bool)),
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m_renderer->hoverPoints(), SLOT(setDisabled(bool)));
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connect(m_renderer, SIGNAL(descriptionEnabledChanged(bool)),
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whatsThisButton, SLOT(setChecked(bool)));
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connect(m_renderer, SIGNAL(descriptionEnabledChanged(bool)),
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m_renderer->hoverPoints(), SLOT(setDisabled(bool)));
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m_renderer->loadSourceFile(":res/gradients/gradients.cpp");
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m_renderer->loadDescription(":res/gradients/gradients.html");
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QTimer::singleShot(50, this, SLOT(setDefault1()));
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}
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void GradientWidget::setDefault(int config)
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{
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QGradientStops stops;
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QPolygonF points;
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switch (config) {
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case 1:
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stops << QGradientStop(0.00, QColor::fromRgba(0));
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stops << QGradientStop(0.04, QColor::fromRgba(0xff131360));
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stops << QGradientStop(0.08, QColor::fromRgba(0xff202ccc));
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stops << QGradientStop(0.42, QColor::fromRgba(0xff93d3f9));
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stops << QGradientStop(0.51, QColor::fromRgba(0xffb3e6ff));
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stops << QGradientStop(0.73, QColor::fromRgba(0xffffffec));
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stops << QGradientStop(0.92, QColor::fromRgba(0xff5353d9));
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stops << QGradientStop(0.96, QColor::fromRgba(0xff262666));
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stops << QGradientStop(1.00, QColor::fromRgba(0));
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m_linearButton->animateClick();
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m_repeatSpreadButton->animateClick();
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break;
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case 2:
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stops << QGradientStop(0.00, QColor::fromRgba(0xffffffff));
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stops << QGradientStop(0.11, QColor::fromRgba(0xfff9ffa0));
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stops << QGradientStop(0.13, QColor::fromRgba(0xfff9ff99));
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stops << QGradientStop(0.14, QColor::fromRgba(0xfff3ff86));
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stops << QGradientStop(0.49, QColor::fromRgba(0xff93b353));
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stops << QGradientStop(0.87, QColor::fromRgba(0xff264619));
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stops << QGradientStop(0.96, QColor::fromRgba(0xff0c1306));
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stops << QGradientStop(1.00, QColor::fromRgba(0));
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m_radialButton->animateClick();
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m_padSpreadButton->animateClick();
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break;
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case 3:
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stops << QGradientStop(0.00, QColor::fromRgba(0));
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stops << QGradientStop(0.10, QColor::fromRgba(0xffe0cc73));
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stops << QGradientStop(0.17, QColor::fromRgba(0xffc6a006));
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stops << QGradientStop(0.46, QColor::fromRgba(0xff600659));
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stops << QGradientStop(0.72, QColor::fromRgba(0xff0680ac));
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stops << QGradientStop(0.92, QColor::fromRgba(0xffb9d9e6));
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stops << QGradientStop(1.00, QColor::fromRgba(0));
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m_conicalButton->animateClick();
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m_padSpreadButton->animateClick();
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break;
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case 4:
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stops << QGradientStop(0.00, QColor::fromRgba(0xff000000));
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stops << QGradientStop(1.00, QColor::fromRgba(0xffffffff));
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break;
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default:
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qWarning("bad default: %d\n", config);
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break;
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}
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QPolygonF pts;
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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());
|
|
|
|
}
|