first commit

2022-10-20 20:29:11 +08:00
commit 4d531f8044
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+#ifndef FGCANVASGROUP_H
+#define FGCANVASGROUP_H
+
+#include "fgcanvaselement.h"
+
+class FGCanvasGroup : public FGCanvasElement
+{
+    Q_OBJECT
+public:
+    explicit FGCanvasGroup(FGCanvasGroup* pr, LocalProp* prop);
+
+    const FGCanvasElementVec& children() const;
+
+    void markChildZIndicesDirty() const;
+
+    bool hasChilden() const;
+
+    unsigned int childCount() const;
+
+    FGCanvasElement* childAt(unsigned int index) const;
+
+    unsigned int indexOfChild(const FGCanvasElement* e) const;
+
+    CanvasItem* createQuickItem(QQuickItem *parent) override;
+    CanvasItem* quickItem() const override
+    { return _quick; }
+
+    void removeChild(FGCanvasElement* child);
+
+    void dumpElement() override;
+signals:
+    void childAdded();
+    void childRemoved(int index);
+
+    void canvasSizeChanged();
+protected:
+    virtual void doPaint(FGCanvasPaintContext* context) const override;
+
+    void doPolish() override;
+
+    bool onChildAdded(LocalProp *prop) override;
+    bool onChildRemoved(LocalProp *prop) override;
+
+    virtual void markStyleDirty() override;
+
+    void doDestroy() override;
+private:
+    void markCachedSymbolDirty();
+    int indexOfChildWithProp(LocalProp *prop) const;
+    void resetChildQuickItemZValues();
+
+private:
+    mutable FGCanvasElementVec _children;
+    mutable bool _zIndicesDirty = false;
+    mutable bool _cachedSymbolDirty = false;
+
+
+    CanvasItem* _quick = nullptr;
+};
+
+#endif // FGCANVASGROUP_H