private void TryReCreateCanvasHost(bool isUseDefaultBackgroudLayer)
{
if (_runtime == null)
{
return;
}
if (_canvasHost == null)
{
_canvasHost = new CanvasHost();
_canvasHost.CreateCanvas();
_canvasHost.Dock = DockStyle.Fill;
_canvasHost.Canvas.IsDrawScalePercent = false;
_canvasHost.Canvas.OnEnvelopeChanged += new EventHandler((sender, e) =>
{
_isNeedReRender = true;
});
if (_canvasHost.Canvas != null && _canvasHost.Canvas.CanvasSetting != null && _canvasHost.Canvas.CanvasSetting.RenderSetting != null)
{
_canvasHost.Canvas.CanvasSetting.RenderSetting.BackColor = Color.White;
}
TryApplyDefaultBackgroudLayer(isUseDefaultBackgroudLayer);
Controls.Add(_canvasHost);
}
_canvasHost.Size = Size;
if (_buffer == null || _buffer.Width != _canvasHost.Width || _buffer.Height != _canvasHost.Height)
{
if (_buffer != null)
{
_buffer.Dispose();
}
_buffer = new Bitmap(_canvasHost.Width, _canvasHost.Height, PixelFormat.Format24bppRgb);
}
}
private void button11_Click(object sender, EventArgs e)
{
_rasterLayer = null;
this.Controls.Remove(canvasHost1);
_canvas = null;
CanvasHost host = this.canvasHost1;
this.canvasHost1 = null;
(host as IDisposable).Dispose();
(host as UserControl).Dispose();
GC.Collect();
}
void IDisposable.Dispose()
{
if (_canvasHost != null)
{
if (_canvasHost as IDisposable != null)
{
(_canvasHost as IDisposable).Dispose();
}
_canvasHost.Dispose();
_canvasHost = null;
}
if (_buffer != null)
{
_buffer.Dispose();
_buffer = null;
}
_runtime = null;
_dataFrame = null;
}
