private void SetHighlightCurrentLineBackground(SolidColorBrush brush)
{
try
{
var oldRenderer = null as HighlightCurrentLineBackgroundRenderer;
foreach (var item in this.TextArea.TextView.BackgroundRenderers)
{
if (item != null && item is HighlightCurrentLineBackgroundRenderer)
{
oldRenderer = item as HighlightCurrentLineBackgroundRenderer;
}
}
this.TextArea.TextView.BackgroundRenderers.Remove(oldRenderer);
if (this._currentLineRenderer != null)
{
if (this.TextArea.TextView.BackgroundRenderers.Contains(this._currentLineRenderer))
{
this.TextArea.TextView.BackgroundRenderers.Remove(this._currentLineRenderer);
}
this._currentLineRenderer = null;
}
this._currentLineRenderer = new HighlightCurrentLineBackgroundRenderer(this, brush.Clone());
this.TextArea.TextView.BackgroundRenderers.Add(this._currentLineRenderer);
}
catch (Exception ex)
{
Debug.WriteLine(ex);
}
}
/// <summary>
/// Reset the <seealso cref="SolidColorBrush"/> to be used for highlighting the current editor line.
/// </summary>
private void AdjustCurrentLineBackground()
{
HighlightCurrentLineBackgroundRenderer oldRenderer = null;
// Make sure there is only one of this type of background renderer
// Otherwise, we might keep adding and WPF keeps drawing them on top of each other
foreach (var item in this.TextArea.TextView.BackgroundRenderers)
{
if (item != null)
{
if (item is HighlightCurrentLineBackgroundRenderer)
{
oldRenderer = item as HighlightCurrentLineBackgroundRenderer;
}
}
}
if (oldRenderer != null)
{
this.TextArea.TextView.BackgroundRenderers.Remove(oldRenderer);
}
this.TextArea.TextView.BackgroundRenderers.Add(new HighlightCurrentLineBackgroundRenderer(this));
}
