1 files changed, 51 insertions, 0 deletions
diff --git a/stats/chartitem.h b/stats/chartitem.h
new file mode 100644
index 000000000..fb4b67dff
--- /dev/null
+++ b/stats/chartitem.h
@@ -0,0 +1,51 @@
+// 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;
+
+class ChartItem {
+public:
+	ChartItem(StatsView &v);
+	~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
+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, const QPen &pen, const QBrush &brush, double radius);
+	~ChartRectItem();
+	void resize(QSizeF size);
+private:
+	QPen pen;
+	QBrush brush;
+	double radius;
+};
+
+#endif