增加预览页介绍信息显示

client/gui/dialogs/EntityIntroPopup.h

@@ -0,0 +1,37 @@
+#pragma once
+
+#include "core/domain/EntityIntro.h"
+
+#include <QWidget>
+
+class QLabel;
+class QTextEdit;
+class QVBoxLayout;
+
+namespace gui {
+
+/// 预览模式下在实体附近显示的介绍浮层（非模态，可随内容伸缩）
+class EntityIntroPopup final : public QWidget {
+    Q_OBJECT
+public:
+    explicit EntityIntroPopup(QWidget* parent = nullptr);
+
+    void setProjectDir(const QString& absoluteProjectDir);
+    void setContent(const core::EntityIntroContent& content);
+    void showNearCanvasPoint(const QPoint& viewPos, QWidget* canvasWidget);
+
+    void clearAndHide();
+
+protected:
+    void paintEvent(QPaintEvent* e) override;
+
+private:
+    QString m_projectDirAbs;
+    QLabel* m_title = nullptr;
+    QTextEdit* m_body = nullptr;
+    QWidget* m_imagesHost = nullptr;
+    QVBoxLayout* m_imagesLayout = nullptr;
+    QLabel* m_videoHint = nullptr;
+};
+
+}  // namespace gui