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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0 WITH Qt-GPL-exception-1.0
#include "huecontrol.h"
#include <QPainter>
#include <QMouseEvent>
static inline int clamp(int x, int lower, int upper)
{
if (x < lower)
x = lower;
if (x > upper)
x = upper;
return x;
}
namespace QmlEditorWidgets {
void HueControl::setCurrent(int y)
{
y = clamp(y, 0, 120);
int oldAlpha = m_color.alpha();
m_color.setHsv((y * 359)/120, m_color.hsvSaturation(), m_color.value());
m_color.setAlpha(oldAlpha);
update(); // redraw pointer
emit hueChanged(m_color.hsvHue());
}
void HueControl::setHue(int newHue)
{
if (m_color.hsvHue() == newHue)
return;
m_color.setHsv(newHue, m_color.hsvSaturation(), m_color.value());
update();
emit hueChanged(m_color.hsvHue());
}
void HueControl::paintEvent(QPaintEvent *event)
{
QWidget::paintEvent(event);
QPainter p(this);
int localHeight = 120;
if (m_cache.isNull()) {
m_cache = QPixmap(10, localHeight);
QPainter cacheP(&m_cache);
for (int i = 0; i < localHeight; i++)
{
QColor c;
c.setHsv( (i*359) / 120.0, 255,255);
cacheP.fillRect(0, i, 10, i + 1, c);
}
}
p.drawPixmap(0, 5, m_cache);
QVector<QPointF> points;
int y = m_color.hueF() * 120 + 5;
points.append(QPointF(5, y));
points.append(QPointF(15, y + 5));
points.append(QPointF(15, y - 5));
p.setRenderHint(QPainter::Antialiasing, true);
p.translate(0.5, 1.5);
p.setPen(QColor(0, 0, 0, 120));
p.drawPolygon(points);
p.translate(0, -1);
p.setPen(0x222222);
p.setBrush(QColor(0x707070));
p.drawPolygon(points);
}
void HueControl::mousePressEvent(QMouseEvent *e)
{
// The current cell marker is set to the cell the mouse is pressed in
QPoint pos = e->pos();
m_mousePressed = true;
setCurrent(pos.y() - 5);
}
void HueControl::mouseReleaseEvent(QMouseEvent * /* event */)
{
m_mousePressed = false;
}
void HueControl::mouseMoveEvent(QMouseEvent *e)
{
if (!m_mousePressed)
return;
QPoint pos = e->pos();
setCurrent(pos.y() - 5);
}
} //QmlEditorWidgets
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