방법: 시각적 요소의 그리기 콘텐츠 열거

Drawing 개체는 Visual의 콘텐츠를 열거하기 위한 개체 모델을 제공합니다.

예시

다음 예제에서는 GetDrawing 메서드를 사용하여 값이 Visual인 DrawingGroup을 찾아옵니다.

public void RetrieveDrawing(Visual v)
{
    DrawingGroup drawingGroup = VisualTreeHelper.GetDrawing(v);
    EnumDrawingGroup(drawingGroup);
}

// Enumerate the drawings in the DrawingGroup.
public void EnumDrawingGroup(DrawingGroup drawingGroup)
{
    DrawingCollection dc = drawingGroup.Children;

    // Enumerate the drawings in the DrawingCollection.
    foreach (Drawing drawing in dc)
    {
        // If the drawing is a DrawingGroup, call the function recursively.
        if (drawing is DrawingGroup group)
        {
            EnumDrawingGroup(group);
        }
        else if (drawing is GeometryDrawing)
        {
            // Perform action based on drawing type.
        }
        else if (drawing is ImageDrawing)
        {
            // Perform action based on drawing type.
        }
        else if (drawing is GlyphRunDrawing)
        {
            // Perform action based on drawing type.
        }
        else if (drawing is VideoDrawing)
        {
            // Perform action based on drawing type.
        }
    }
}

참고하십시오

• Drawing
• DrawingGroup
• VisualTreeHelper
• Drawing 개체 개요
• WPF 그래픽 렌더링 개요