在WPF C＃中放大畫布

Question

我幾乎實現了Canvas和ToolBar（在WPF C＃中）以及類似於Paint的矢量圖形編輯器。 我在使用Zoom時遇到問題。 據我了解的縮放：

0）我選擇工具ZoomTool;
1）我在畫布上選擇一個點；
2）我點擊它，所有必要的工作在這里進行：

1.將所選點移動（移動）到“畫布”的中心；

2.相對於中心放大2倍（例如）

問題是這項工作的執行情況（移位和放大），該怎么做？ 在此處輸入圖片說明

Answer 1

這是我的代碼：

class RecZoomTool : Tool
{
        public RecZoomTool()
        {
        }

        public override void MouseDown(Point mousePosition)
        {
            Point pointDirection = new Point(Creator.CanvasWidth / 2, Creator.CanvasHeight /2);
            Creator.ShearingZoom(Point.Subtract(pointDirection, mousePosition));
            Creator.Zooming(2);
        }
}

然后--->

    public static void Zooming(double delta)
    {
        foreach (var figure in Figures)
        {
            for (int j = 0; j < figure.coordinates.Count; j++)
            {
                figure.coordinates[j] = new Point(
                    figure.coordinates[j].X * scaleZoom,
                    figure.coordinates[j].Y * scaleZoom
                );
            }
        }

    //    scaleZoom += delta;
    }
    public static void ShearingZoom(Point dPoint, Point mPoint)
    {
        foreach (var figure in Figures)
        {
            Vector delta = Point.Subtract(mPoint, dPoint);
            for (int j = 0; j < figure.coordinates.Count; j++)
            {
                figure.coordinates[j] = new Point(dPoint.X, dPoint.Y);
                //counterZoom++;
                //delta = Point.Subtract(figure.coordinates[j], dPoint);
                figure.coordinates[j] = Point.Add(figure.coordinates[j], delta);
            }

            offsetPosition += delta;
        }
    }

Answer 2

每次MouseClick的正確答案：

        public override void MouseDown(Point mousePosition)
        {
            double valueZoom = 2.0;
            Point pointDirection = new Point(0.0, 0.0);
            Creator.Shifting(Point.Subtract(pointDirection, mousePosition));
            Creator.Zooming(valueZoom);
        }

並且在主要課程中：

    public static int scaleZoom = 2;
    public static Vector offsetPosition = new Vector(0.0, 0.0);
    public static int counterZoom = 0;

    public static void Zooming(double scaleZoom)
    {
        foreach (var figure in Figures)
        {
            for (int j = 0; j < figure.coordinates.Count; j++)
            {
                figure.coordinates[j] = new Point(
                    figure.coordinates[j].X * scaleZoom,
                    figure.coordinates[j].Y * scaleZoom
                );
            }
        }
    }

    public static void Shifting(Vector delta)
    {
        offsetPosition = delta / scaleZoom;
        foreach (var figure in Figures)
        {
            for (int j = 0; j < figure.coordinates.Count; j++)
            {
                figure.coordinates[j] = Point.Add(figure.coordinates[j], offsetPosition);
            }
        }

    }