37 lines
745 B
C++
37 lines
745 B
C++
#pragma once
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#include <QtGui/QImage>
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#include <QtCore/QMap>
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#include <QtCore/QPointF>
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namespace LAMPMainWidget {
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/**
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* 用于图层的渲染数据提供，每个图层必须包含与其对应的provider。
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*/
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class LayerProvider : public QObject {
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Q_OBJECT
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public slots:
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virtual void createTask(const QRectF &rect, int zoom) = 0;
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public:
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explicit LayerProvider(QObject *parent = nullptr)
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: QObject(parent) {}
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~LayerProvider() override = default;
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public:
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/**
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* 返回可显示的图像内容
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* @return 图像对象
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*/
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virtual const QImage preparedImage() const = 0;
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/**
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* 判断是否有数据可以使用
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* @return 有数据时为true，否则fasle
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*/
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virtual bool hasContent() const = 0;
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};
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}
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