first commit

ImagePreviewer.h

@@ -0,0 +1,30 @@
+#ifndef IMAGEPREVIEWER_H
+#define IMAGEPREVIEWER_H
+
+#include <QWidget>
+
+/**
+ * @brief 用于ImageLoader的图片预览器
+ */
+class ImagePreviewer : public QWidget
+{
+    Q_OBJECT
+public:
+    explicit ImagePreviewer(QWidget *parent = nullptr);
+
+    void setImg(QImage img);
+
+    void setMaxScaleMultiple(int m);
+
+protected:
+    virtual void paintEvent(QPaintEvent* event) override;
+
+signals:
+
+private:
+    QImage m_img;
+
+    int m_maxScaleMultiple = 3;
+};
+
+#endif // IMAGEPREVIEWER_H