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// SPDX-License-Identifier: GPL-2.0
// Wrappers around QSGImageNode that allow painting onto an image
// and then turning that into a texture to be displayed in a QQuickItem.
#ifndef CHART_ITEM_H
#define CHART_ITEM_H
#include <memory>
#include <QPainter>
class QSGImageNode;
class QSGTexture;
class StatsView;
enum class ChartZValue : int;
class ChartItem {
public:
ChartItem(StatsView &v, ChartZValue z);
~ChartItem();
// Attention: The children are responsible for updating the item. None of these calls will.
void resize(QSizeF size); // Resets the canvas. Attention: image is *unitialized*.
void setPos(QPointF pos);
void render(); // Only call on render thread!
QRectF getRect() const;
bool dirty; // If true, call render() when rebuilding the scene
const ChartZValue zValue;
protected:
std::unique_ptr<QPainter> painter;
std::unique_ptr<QImage> img;
QSizeF sceneSize() const;
void setTextureDirty();
void setPositionDirty();
private:
StatsView &view;
QRectF rect;
bool positionDirty;
bool textureDirty;
std::unique_ptr<QSGImageNode> node;
std::unique_ptr<QSGTexture> texture;
};
// Draw a rectangular background after resize. Children are responsible for calling update().
class ChartRectItem : public ChartItem {
public:
ChartRectItem(StatsView &v, ChartZValue z, const QPen &pen, const QBrush &brush, double radius);
~ChartRectItem();
void resize(QSizeF size);
private:
QPen pen;
QBrush brush;
double radius;
};
#endif
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