/// <summary>
/// Draws a line of the content.
/// </summary>
/// <param name="e">Event arguments.</param>
protected virtual void OnDrawLine(DrawNodeLineEventArgs e)
{
DrawLine?.Invoke(this, e);
if (e.Handled)
{
return;
}
var eContent = new GetLineContentsEventArgs(e.Node, e.LineIndex, Color.Empty);
OnGetLineContents(eContent);
if (eContent.ShowBar)
{
// Free space indicator
using (Brush bBarBack = new SolidBrush(BarBackColor))
using (Brush bBarFill = new SolidBrush(!eContent.Color.IsEmpty ? eContent.Color : eContent.BarPercentage > BarCriticalPercentage ? BarCriticalFillColor : BarFillColor))
using (Pen pBarBorder = new Pen(BarBorderColor))
{
e.Graphics.FillRectangle(bBarBack, e.Bounds);
e.Graphics.FillRectangle(bBarFill, new RectangleF(e.Bounds.Left, e.Bounds.Top, e.Bounds.Width * eContent.BarPercentage, e.Bounds.Height));
e.Graphics.DrawRectangle(pBarBorder, Utility.ToRectangle(e.Bounds));
}
}
else
{
using (Brush brush = new SolidBrush(!eContent.Color.IsEmpty ? eContent.Color : e.LineIndex == 0 ? ForeColor : DetailTextColor))
using (StringFormat stringFormat = new StringFormat())
{
e.Graphics.DrawString(eContent.Contents, Font, brush, e.Bounds, stringFormat);
}
}
}
/// <summary>
/// Paints the contents of the control.
/// </summary>
/// <param name="e">Event arguments.</param>
protected virtual void OnDrawContents(DrawNodeEventArgs e)
{
DrawContents?.Invoke(this, e);
if (e.Handled)
{
return;
}
var eLines = new GetLineCountEventArgs(e.Node);
OnGetLineCount(eLines);
int lines = eLines.LineCount;
float textHeight = GetTextHeight(e.Node);
RectangleF iconRect = new RectangleF(e.Bounds.Left + ContentPadding.Width, e.Bounds.Top + (e.Bounds.Height - ThumbnailSize.Height) / 2f,
ThumbnailSize.Width, ThumbnailSize.Height);
RectangleF textRect = new RectangleF(e.Bounds.Left + ContentPadding.Width + ThumbnailSize.Width + ThumbnailTextSpacing, e.Bounds.Top + (e.Bounds.Height - textHeight) / 2f,
e.Bounds.Width - iconRect.Width - 2 * ContentPadding.Width - ThumbnailTextSpacing, textHeight);
// Draw the image
if (e.Node.Thumbnail != null)
{
Rectangle pos = Utility.GetSizedIconBounds(e.Node.Thumbnail, Utility.ToRectangle(iconRect), 0.0f, 0.5f);
e.Graphics.DrawImage(e.Node.Thumbnail, pos);
}
// Draw item text
RectangleF lineBounds = textRect;
for (int i = 0; i < eLines.LineCount; i++)
{
var eHeight = new GetLineHeightEventArgs(e.Node, i);
OnGetLineHeight(eHeight);
float lineHeight = eHeight.LineHeight > 0 ? eHeight.LineHeight : Font.Height;
lineBounds.Height = lineHeight;
// Draw line of text
DrawNodeLineEventArgs eLine = new DrawNodeLineEventArgs(e.Graphics,
Utility.ToRectangle(lineBounds), e.Node, e.Enabled, e.Selected, e.Hovered, e.ControlHasFocus, i);
OnDrawLine(eLine);
// Offset the bounds to the next line below
lineBounds.Offset(0, lineHeight + Font.Height * 0.2f);
}
}