File indexing completed on 2024-05-26 04:32:51 

0001 /*
0002  * SPDX-FileCopyrightText: 2020 Mathias Wein <lynx.mw+kde@gmail.com>
0003  *
0004  * SPDX-License-Identifier: GPL-3.0-or-later
0005  */
0006 
0007 #ifndef WGSHADESLIDER_H
0008 #define WGSHADESLIDER_H
0009 
0010 #include "WGSelectorWidgetBase.h"
0011 
0012 #include <KisVisualColorModel.h>
0013 
0014 #include <QWidget>
0015 #include <QScopedPointer>
0016 #include <QVector4D>
0017 
0018 class QImage;
0019 
0020 class WGShadeSlider : public QWidget
0021 {
0022     Q_OBJECT
0023 public:
0024     explicit WGShadeSlider(WGSelectorDisplayConfigSP config, QWidget *parent = nullptr, KisVisualColorModelSP model = nullptr);
0025     ~WGShadeSlider() override;
0026 
0027     void setGradient(const QVector4D &range, const QVector4D &offset);
0028     void setDisplayMode(bool slider, int numPatches = -1);
0029     void setModel(KisVisualColorModelSP model);
0030     QVector4D channelValues() const;
0031     const QImage* background();
0032 
0033 public Q_SLOTS:
0034     void slotSetChannelValues(const QVector4D &values);
0035     void resetHandle();
0036 
0037 protected Q_SLOTS:
0038     void slotDisplayConfigurationChanged();
0039 
0040 protected:
0041     QSize minimumSizeHint() const override;
0042     void mousePressEvent(QMouseEvent *event) override;
0043     void mouseMoveEvent(QMouseEvent *event) override;
0044     void mouseReleaseEvent(QMouseEvent *event) override;
0045     //void tabletEvent(QTabletEvent *event) override;
0046     void paintEvent(QPaintEvent*) override;
0047     void resizeEvent(QResizeEvent *) override;
0048 
0049     bool adjustHandleValue(const QPointF &widgetPos);
0050     QPointF convertSliderValueToWidgetCoordinate(qreal value);
0051     qreal convertWidgetCoordinateToSliderValue(QPointF coordinate);
0052     QVector4D calculateChannelValues(qreal sliderPos) const;
0053     int getPatch(const QPointF pos) const;
0054     QRectF patchRect(int index) const;
0055     void recalculateParameters();
0056     bool sizeRequirementsMet() const;
0057     QImage renderBackground();
0058     /*!
0059      * \brief strokeRect
0060      * \param painter shall already be scaled so that 1 unit == 1 real Pixel
0061      * \param rect the rectangle to stroke in (logical) widget coordinates
0062      * \param pixelSize devicePixelRatioF() that was used to determine the real dimensions
0063      * \param shrinkX shrinks the rect by a multiple of the line width used to stroke
0064      */
0065     void strokeRect(QPainter &painter, const QRectF &rect, qreal pixelSize, qreal shrinkX);
0066 
0067 Q_SIGNALS:
0068     void sigChannelValuesChanged(const QVector4D &values);
0069     void sigInteraction(bool active);
0070 private:
0071     struct Private;
0072     const QScopedPointer<Private> m_d;
0073 };
0074 
0075 #endif // WGSHADESLIDER_H