protected internal virtual void RenderRecursive(DrawingContext dc)
{
Debug.Assert(this.IsMeasureValid && this.IsArrangeValid);
dc.Translate(_offsetX, _offsetY);
dc.PushClippingRectangle(0, 0, _renderWidth, _renderHeight);
try
{
Debug.Assert(this.Visibility == Visibility.Visible);
if (!dc.EmptyClipRect)
{
OnRender(dc);
UIElementCollection children = _logicalChildren;
if (children != null)
{
int n = children.Count;
for (int i = 0; i < n; i++)
{
UIElement child = children[i];
if (child.IsRenderable())
{
child.RenderRecursive(dc);
}
}
}
}
}
finally
{
dc.PopClippingRectangle();
dc.Translate(-_offsetX, -_offsetY);
//-------------------------------------------------------------------------------
// Reset the render flags.
_flags &= ~(Flags.IsSubtreeDirtyForRender | Flags.IsDirtyForRender);
}
}
public override void OnRender(DrawingContext dc)
{
if (_pushClippingRectangle)
{
try
{
dc.PushClippingRectangle(x0, y0, xDimension, yDimension);
}
catch (ArgumentException ex)
{
Log.Comment("Caught " + ex.Message + " when Pushing a clipping rectangle at (" + x0 + ", " + y0 + ")" +
" and Width = " + xDimension + " Height = " + yDimension);
_argumentException = true;
}
}
if (_popClippingRectangle)
{
dc.PopClippingRectangle();
}
if (_getClippingRectangle)
{
dc.GetClippingRectangle(out x1, out y1, out wd, out ht);
}
if (_drawLine)
{
dc.DrawLine(_pen, x0, y0, x1, y1);
}
if (_drawRectangle)
{
try
{
dc.DrawRectangle(_brush, _pen, r, s, xDimension, yDimension);
}
catch (ArgumentException ex)
{
Log.Comment("Caught " + ex.Message + " when drawing a Rectangle at (" + r + ", " + s + ")" +
" Width = " + xDimension + " Height = " + yDimension);
_argumentException = true;
}
}
if (_drawEllipse)
{
dc.DrawEllipse(_brush, _pen, r, s, xDimension, yDimension);
}
if (_drawPolygon)
{
dc.DrawPolygon(_brush, _pen, pts);
}
if (_clear)
{
dc.Clear();
}
if (_setPixel)
{
dc.SetPixel(_color, r, s);
}
if (_drawImage)
{
try
{
dc.DrawImage(bmp1, r, s);
}
catch (NullReferenceException ex)
{
Log.Comment("Caught " + ex.Message + " when drawing a null Image");
_nullReferenceException = true;
}
}
if (_drawCroppedImage)
{
try
{
dc.DrawImage(bmp1, r, s, x0, y0, xDimension, yDimension);
}
catch (ArgumentException ex)
{
Log.Comment("Caught " + ex.Message + " when drawing an Image at (" + r + ", " + s + ")" +
"from a source Image at(" + x0 + ", " + y0 + ") Width = " + xDimension + " Height = " + yDimension);
_argumentException = true;
}
catch (NullReferenceException ex)
{
Log.Comment("Caught " + ex.Message + " when drawing a null Image");
_nullReferenceException = true;
}
}
if (_translate)
{
dc.Translate(r, s);
}
if (_blendImage)
{
dc.BlendImage(bmp2, x0, y0, x1, y1, xDimension, yDimension, _opacity);
}
if (_drawText)
{
_textFits = dc.DrawText(ref _str, _font, _color, r, s, xDimension, yDimension, _alignment, _trimming);
}
base.OnRender(dc);
_pBitmap = dc.Bitmap;
Master_Media.autoEvent.Set();
}
