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/*
* SPDX-FileCopyrightText: 2013-2020 Mattia Basaglia
* SPDX-FileCopyrightText: 2014 Calle Laakkonen
* SPDX-FileCopyrightText: 2017 caryoscelus
*
* SPDX-License-Identifier: LGPL-3.0-or-later
*/
#ifndef GRADIENT_SLIDER_HPP
#define GRADIENT_SLIDER_HPP
#include "colorwidgets_global.hpp"
#include <QSlider>
#include <QGradient>
namespace color_widgets {
/**
* \brief A slider that moves on top of a gradient
*/
class QCP_EXPORT GradientSlider : public QSlider
{
Q_OBJECT
Q_PROPERTY(QBrush background READ background WRITE setBackground NOTIFY backgroundChanged)
Q_PROPERTY(QGradientStops colors READ colors WRITE setColors DESIGNABLE false)
Q_PROPERTY(QColor firstColor READ firstColor WRITE setFirstColor STORED false)
Q_PROPERTY(QColor lastColor READ lastColor WRITE setLastColor STORED false)
Q_PROPERTY(QLinearGradient gradient READ gradient WRITE setGradient)
public:
explicit GradientSlider(QWidget *parent = nullptr);
explicit GradientSlider(Qt::Orientation orientation, QWidget *parent = nullptr);
~GradientSlider();
/// Get the background, it's visible for transparent gradient stops
QBrush background() const;
/// Set the background, it's visible for transparent gradient stops
void setBackground(const QBrush &bg);
/// Get the colors that make up the gradient
QGradientStops colors() const;
/// Set the colors that make up the gradient
void setColors(const QGradientStops &colors);
/// Get the gradient
QLinearGradient gradient() const;
/// Set the gradient
void setGradient(const QLinearGradient &gradient);
/**
* Overload: create an evenly distributed gradient of the given colors
*/
void setColors(const QVector<QColor> &colors);
/**
* \brief Set the first color of the gradient
*
* If the gradient is currently empty it will create a stop with the given color
*/
void setFirstColor(const QColor &c);
/**
* \brief Set the last color of the gradient
*
* If the gradient is has less than two colors,
* it will create a stop with the given color
*/
void setLastColor(const QColor &c);
/**
* \brief Get the first color
*
* \returns QColor() con empty gradient
*/
QColor firstColor() const;
/**
* \brief Get the last color
*
* \returns QColor() con empty gradient
*/
QColor lastColor() const;
Q_SIGNALS:
void backgroundChanged(const QBrush&);
protected:
void paintEvent(QPaintEvent *ev) override;
void mousePressEvent(QMouseEvent *ev) override;
void mouseMoveEvent(QMouseEvent *ev) override;
void mouseReleaseEvent(QMouseEvent *ev) override;
private:
class Private;
Private * const p;
};
} // namespace color_widgets
#endif // GRADIENT_SLIDER_HPP
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