如何将图像平移限制在范围内

Question

我有一个图像，我在缩放后将其平移，在水平平移时，图像被移动，左侧留有空白。我想限制图像何时达到左边界。顶部，右侧，底部平移也是如此。

Panned image Expected output

     private void Grid1_MouseMove(object sender, MouseEventArgs e)
    {
        if (!image1.IsMouseCaptured) return;

        Point p = e.MouseDevice.GetPosition(image1);

        var rect2 = new Rect(image1.RenderSize);
        Bounds = image1.TransformToAncestor(grid1).TransformBounds(rect2);

        matrix = zoomMatrixTransform.Matrix;
        Vector v = start - e.GetPosition(grid1);

        matrix.OffsetX = origin.X - v.X;
        matrix.OffsetY = origin.Y - v.Y;

        zoomMatrixTransform.Matrix = matrix;

        image1.RenderTransformOrigin = new Point(0.5, 0.5);
        image1.LayoutTransform = zoomMatrixTransform;
    }

我已附加平移的图像，并且希望限制红色突出显示区域。还附上了预期的输出。