/// <summary>
/// Zoom to a given rectangle.
/// The rectangle is in local space.
/// </summary>
public override void ZoomToRectangle(RectangleF rectangle)
{
using (var update = canvas.BeginUpdate())
{
var origRect = rectangle;
// Adjust (correct) rectangle
Size sz = Global2Local(this.Size);
if (rectangle.Left < 0)
{
rectangle.Offset(-rectangle.Left, 0);
}
if (rectangle.Top < 0)
{
rectangle.Offset(0, -rectangle.Top);
}
rectangle.Width = Math.Min(rectangle.Width, sz.Width);
rectangle.Height = Math.Min(rectangle.Height, sz.Height);
Size panelSize = LayoutManager.ClientSize(canvas.PanelSize);
float h = (float)panelSize.Width / rectangle.Width;
float v = (float)panelSize.Height / rectangle.Height;
canvas.ZoomFactor = Math.Min(h, v);
panelSize = canvas.PanelSize;
var zoomFactor = canvas.ZoomFactor;
float localPanelWidth = panelSize.Width / zoomFactor;
float localPanelHeight = panelSize.Height / zoomFactor;
float dx = (localPanelWidth - rectangle.Width) / 2;
float dy = (localPanelHeight - rectangle.Height) / 2;
canvas.VisibleLeft = (int)(rectangle.Left - dx);
canvas.VisibleTop = (int)(rectangle.Top - dy);
}
}
