Revision control
++ // Copyright (C) 2016 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
++
++ #include "gradients.h"
++ #include "hoverpoints.h"
++
++ #include <QLabel>
++
++ #include <algorithm>
++
++ 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_OpaquePaintEvent);
++ }
++
++ 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, &HoverPoints::pointsChanged,
++ this, &ShadeWidget::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));
++ if (qIsNull(l.dx()))
++ continue;
++ 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 (const auto &stop : stops) {
++ QColor c = stop.second;
++ m_alpha_gradient.setColorAt(stop.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->setContentsMargins(1, 1, 1, 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, &ShadeWidget::colorsChanged,
++ this, &GradientEditor::pointsUpdated);
++ connect(m_green_shade, &ShadeWidget::colorsChanged,
++ this, &GradientEditor::pointsUpdated);
++ connect(m_blue_shade, &ShadeWidget::colorsChanged,
++ this, &GradientEditor::pointsUpdated);
++ connect(m_alpha_shade, &ShadeWidget::colorsChanged,
++ this, &GradientEditor::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();
++
++ std::sort(points.begin(), points.end(), x_less_than);
++
++ for (int i = 0; i < points.size(); ++i) {
++ const int x = int(points.at(i).x());
++ if (i + 1 < points.size() && x == int(points.at(i + 1).x()))
++ continue;
++ QColor color((0x00ff0000 & m_red_shade->colorAt(x)) >> 16,
++ (0x0000ff00 & m_green_shade->colorAt(x)) >> 8,
++ (0x000000ff & m_blue_shade->colorAt(x)),
++ (0xff000000 & m_alpha_shade->colorAt(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);
++
++ QWidget *mainContentWidget = new QWidget();
++ QGroupBox *mainGroup = new QGroupBox(mainContentWidget);
++ 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 *presetsGroup = new QGroupBox(mainGroup);
++ presetsGroup->setTitle(tr("Presets"));
++ m_presetLabel = new QLabel(presetsGroup);
++ m_presetLabel->setAlignment(Qt::AlignCenter);
++ QPushButton *prevPresetButton = new QPushButton(tr("<"), presetsGroup);
++ QPushButton *nextPresetButton = new QPushButton(tr(">"), presetsGroup);
++ updatePresetName();
++
++ QGroupBox *defaultsGroup = new QGroupBox(mainGroup);
++ defaultsGroup->setTitle(tr("Examples"));
++ 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);
++
++ mainGroup->setFixedWidth(200);
++ QVBoxLayout *mainGroupLayout = new QVBoxLayout(mainGroup);
++ mainGroupLayout->addWidget(editorGroup);
++ mainGroupLayout->addWidget(typeGroup);
++ mainGroupLayout->addWidget(spreadGroup);
++ mainGroupLayout->addWidget(presetsGroup);
++ mainGroupLayout->addWidget(defaultsGroup);
++ mainGroupLayout->addStretch(1);
++
++ 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);
++
++ QVBoxLayout *presetsGroupLayout = new QVBoxLayout(presetsGroup);
++ presetsGroupLayout->addWidget(m_presetLabel);
++ QHBoxLayout *presetButtonsLayout = new QHBoxLayout;
++ presetButtonsLayout->addWidget(prevPresetButton);
++ presetButtonsLayout->addWidget(nextPresetButton);
++ presetsGroupLayout->addLayout(presetButtonsLayout);
++
++ QHBoxLayout *defaultsGroupLayout = new QHBoxLayout(defaultsGroup);
++ defaultsGroupLayout->addWidget(default1Button);
++ defaultsGroupLayout->addWidget(default2Button);
++ defaultsGroupLayout->addWidget(default3Button);
++ editorGroupLayout->addWidget(default4Button);
++
++ mainGroup->setLayout(mainGroupLayout);
++
++ QVBoxLayout *mainContentLayout = new QVBoxLayout();
++ mainContentLayout->addWidget(mainGroup);
++ mainContentWidget->setLayout(mainContentLayout);
++
++ QScrollArea *mainScrollArea = new QScrollArea();
++ mainScrollArea->setWidget(mainContentWidget);
++ mainScrollArea->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Preferred);
++
++ // Layouts
++ QHBoxLayout *mainLayout = new QHBoxLayout(this);
++ mainLayout->addWidget(m_renderer);
++ mainLayout->addWidget(mainScrollArea);
++
++ // Open large enough to show the controls without scrolling.
++ const QSize contentHint = mainContentWidget->sizeHint();
++ const QMargins margins = mainLayout->contentsMargins();
++ const int frameV = 2 * mainScrollArea->frameWidth() + margins.top() + margins.bottom();
++ const int scrollBarExtent = style()->pixelMetric(QStyle::PM_ScrollBarExtent);
++ resize(m_renderer->sizeHint().width() + contentHint.width() + frameV + scrollBarExtent,
++ qMax(m_renderer->sizeHint().height(), contentHint.height() + frameV));
++
++ connect(m_editor, &GradientEditor::gradientStopsChanged,
++ m_renderer, &GradientRenderer::setGradientStops);
++ connect(m_linearButton, &QRadioButton::clicked,
++ m_renderer, &GradientRenderer::setLinearGradient);
++ connect(m_radialButton, &QRadioButton::clicked,
++ m_renderer, &GradientRenderer::setRadialGradient);
++ connect(m_conicalButton,&QRadioButton::clicked,
++ m_renderer, &GradientRenderer::setConicalGradient);
++
++ connect(m_padSpreadButton, &QRadioButton::clicked,
++ m_renderer, &GradientRenderer::setPadSpread);
++ connect(m_reflectSpreadButton, &QRadioButton::clicked,
++ m_renderer, &GradientRenderer::setReflectSpread);
++ connect(m_repeatSpreadButton, &QRadioButton::clicked,
++ m_renderer, &GradientRenderer::setRepeatSpread);
++
++ connect(prevPresetButton, &QPushButton::clicked,
++ this, &GradientWidget::setPrevPreset);
++ connect(nextPresetButton, &QPushButton::clicked,
++ this, &GradientWidget::setNextPreset);
++
++ connect(default1Button, &QPushButton::clicked,
++ this, &GradientWidget::setDefault1);
++ connect(default2Button, &QPushButton::clicked,
++ this, &GradientWidget::setDefault2);
++ connect(default3Button, &QPushButton::clicked,
++ this, &GradientWidget::setDefault3);
++ connect(default4Button, &QPushButton::clicked,
++ this, &GradientWidget::setDefault4);
++
++ QTimer::singleShot(50, this, &GradientWidget::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);
++ }
++
++ void GradientWidget::updatePresetName()
++ {
++ QMetaEnum presetEnum = QMetaEnum::fromType<QGradient::Preset>();
++ m_presetLabel->setText(QLatin1String(presetEnum.key(m_presetIndex)));
++ }
++
++ void GradientWidget::changePresetBy(int indexOffset)
++ {
++ QMetaEnum presetEnum = QMetaEnum::fromType<QGradient::Preset>();
++ int maxIndex = presetEnum.keyCount() - 1;
++ if (qstrcmp(presetEnum.key(maxIndex), "NumPresets") == 0)
++ --maxIndex;
++ m_presetIndex = qBound(0, m_presetIndex + indexOffset, maxIndex);
++
++ QGradient::Preset preset = static_cast<QGradient::Preset>(presetEnum.value(m_presetIndex));
++ QGradient gradient(preset);
++ if (gradient.type() != QGradient::LinearGradient)
++ return;
++
++ QLinearGradient *linearGradientPointer = static_cast<QLinearGradient *>(&gradient);
++ QLineF objectStopsLine(linearGradientPointer->start(), linearGradientPointer->finalStop());
++ qreal scaleX = qFuzzyIsNull(objectStopsLine.dx()) ? 1.0 : (0.8 * m_renderer->width() / qAbs(objectStopsLine.dx()));
++ qreal scaleY = qFuzzyIsNull(objectStopsLine.dy()) ? 1.0 : (0.8 * m_renderer->height() / qAbs(objectStopsLine.dy()));
++ QLineF logicalStopsLine = QTransform::fromScale(scaleX, scaleY).map(objectStopsLine);
++ logicalStopsLine.translate(m_renderer->rect().center() - logicalStopsLine.center());
++ QPolygonF logicalStops;
++ logicalStops << logicalStopsLine.p1() << logicalStopsLine.p2();
++
++ m_linearButton->animateClick();
++ m_padSpreadButton->animateClick();
++ m_editor->setGradientStops(gradient.stops());
++ m_renderer->hoverPoints()->setPoints(logicalStops);
++ m_renderer->setGradientStops(gradient.stops());
++
++ updatePresetName();
++ }
++
++ 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);
++
++ QList<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::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 = QLineF(0, 0, 1, 0).angleTo(l);
++ g = QConicalGradient(pts.at(0), angle);
++ }
++
++ for (const auto &stop : std::as_const(m_stops))
++ g.setColorAt(stop.first, stop.second);
++
++ g.setSpread(m_spread);
++
++ p->setBrush(g);
++ p->setPen(Qt::NoPen);
++
++ p->drawRect(rect());
++
++ }