protected override void OnSizeChanged(EventArgs e)
{
VirtualDevice device = Device;
if (device != null)
{
float xScale = 1;
float yScale = 1;
float ppd = OffscreenGraphics.PixelsPerDip;
CefRect viewportRect = device.ViewportRect;
viewportRect.Scale(OffscreenGraphics.PixelsPerDip);
Rectangle clientRect = this.ClientRectangle;
if (viewportRect.Height > clientRect.Height)
{
yScale = Math.Max(clientRect.Height - 6.0f, 1.0f) / viewportRect.Height;
}
if (viewportRect.Width > clientRect.Width)
{
xScale = Math.Max(clientRect.Width - 6.0f, 1.0f) / viewportRect.Width;
}
device.Scale = Math.Min(xScale, yScale);
CefRect bounds = device.GetBounds(ppd);
device.X = (int)(((clientRect.Width - bounds.Width) >> 1) / ppd);
device.Y = (int)(((clientRect.Height - bounds.Height) >> 1) / ppd);
CefInvalidate();
}
base.OnSizeChanged(e);
}
protected CefRect GetViewportRect()
{
CefRect viewportRect;
VirtualDevice device = Device;
if (device == null)
{
viewportRect = new CefRect(0, 0, this.Width, this.Height);
viewportRect.Scale(OffscreenGraphics.PixelsPerDip);
return(viewportRect);
}
else
{
return(device.GetBounds(OffscreenGraphics.PixelsPerDip));
}
}