108 lines
4.0 KiB
C++
108 lines
4.0 KiB
C++
#include "ElaColorPicker.h"
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#include <QMouseEvent>
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#include <QPainter>
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#include <QPainterPath>
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#include <utility>
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#include "ElaTheme.h"
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ElaColorPicker::ElaColorPicker(QWidget *parent) : QWidget{parent} {
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setFixedSize(260, 260);
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_pThemeMode = eTheme->getThemeMode();
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// 初始化色相图
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QPixmap colorPickerPix(QSize(360, 360));
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QImage colorPickerImage = colorPickerPix.toImage();
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for (int y = 0; y < colorPickerImage.height(); y++) {
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for (int x = 0; x < colorPickerImage.width(); x++) {
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QColor pixColor;
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pixColor.setHsvF((qreal)1 / colorPickerPix.width() * x, 1 - (qreal)1 / (colorPickerPix.height() - 1) * y, 1);
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pixColor = pixColor.toRgb();
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colorPickerImage.setPixelColor(x, y, pixColor);
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}
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}
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_colorPickerImage = colorPickerImage;
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}
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ElaColorPicker::~ElaColorPicker() {}
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void ElaColorPicker::setSelectedColor(QColor color) {
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_selectedColor = std::move(color);
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_selectedPoint = QPoint(qRound(3 + 254 * _selectedColor.hueF() + 0.5f), qRound(257 - 254 * _selectedColor.saturationF() + 0.5f));
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update();
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}
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QColor ElaColorPicker::getSelectedColor() const { return _selectedColor; }
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void ElaColorPicker::mousePressEvent(QMouseEvent *event) {
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_selectedPoint = _adjustPointLimit(event->pos());
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QPointF colorPoint((_selectedPoint.x() - 3) / 254.0 * 359, (_selectedPoint.y() - 3) / 254.0 * 359);
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QColor pixColor;
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pixColor.setHsvF((qreal)1 / _colorPickerImage.width() * colorPoint.x(), 1 - (qreal)1 / (_colorPickerImage.height() - 1) * colorPoint.y(), 1);
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_selectedColor = pixColor.toRgb();
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Q_EMIT selectedColorChanged(_selectedColor);
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QWidget::mousePressEvent(event);
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update();
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}
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void ElaColorPicker::mouseReleaseEvent(QMouseEvent *event) {
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_selectedPoint = _adjustPointLimit(event->pos());
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QPointF colorPoint((_selectedPoint.x() - 3) / 254.0 * 359, (_selectedPoint.y() - 3) / 254.0 * 359);
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QColor pixColor;
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pixColor.setHsvF((qreal)1 / _colorPickerImage.width() * colorPoint.x(), 1 - (qreal)1 / (_colorPickerImage.height() - 1) * colorPoint.y(), 1);
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_selectedColor = pixColor.toRgb();
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Q_EMIT selectedColorChanged(_selectedColor);
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QWidget::mouseReleaseEvent(event);
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update();
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}
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void ElaColorPicker::mouseMoveEvent(QMouseEvent *event) {
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_selectedPoint = _adjustPointLimit(event->pos());
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QPointF colorPoint((_selectedPoint.x() - 3) / 254.0 * 359, (_selectedPoint.y() - 3) / 254.0 * 359);
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QColor pixColor;
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pixColor.setHsvF((qreal)1 / _colorPickerImage.width() * colorPoint.x(), 1 - (qreal)1 / (_colorPickerImage.height() - 1) * colorPoint.y(), 1);
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_selectedColor = pixColor.toRgb();
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Q_EMIT selectedColorChanged(_selectedColor);
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QWidget::mouseMoveEvent(event);
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update();
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}
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void ElaColorPicker::paintEvent(QPaintEvent *event) {
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int penWidth = 3;
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int borderRadius = 5;
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QPainter painter(this);
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painter.save();
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painter.setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform);
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// 色相图绘制
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QRect pickerRect = rect();
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pickerRect.adjust(penWidth, penWidth, -penWidth, -penWidth);
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painter.setPen(QPen(ElaThemeColor(_pThemeMode, BasicBorder), penWidth));
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painter.drawRoundedRect(pickerRect, borderRadius, borderRadius);
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QPainterPath path;
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path.addRoundedRect(pickerRect, borderRadius, borderRadius);
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painter.setClipPath(path);
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painter.drawImage(pickerRect, _colorPickerImage);
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// 取色点绘制
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if (!_selectedPoint.isNull()) {
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painter.setPen(QPen(Qt::black, 2));
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painter.setBrush(Qt::NoBrush);
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painter.drawEllipse(_selectedPoint, 8, 8);
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}
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painter.restore();
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}
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QPoint ElaColorPicker::_adjustPointLimit(QPoint point) {
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QRect pickerRect = rect();
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if (point.x() < 3) {
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point.setX(3);
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} else if (point.x() > pickerRect.width() - 3) {
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point.setX(pickerRect.width() - 3);
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}
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if (point.y() < 3) {
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point.setY(3);
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} else if (point.y() > pickerRect.height() - 3) {
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point.setY(pickerRect.height() - 3);
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}
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return point;
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}
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