/// <summary>
/// The <see cref="TreeView.DrawNode"/> event handler
/// for the <see cref="TreeView"/> <see cref="trvSlideshow"/>.
/// Performs customized drawing of the <see cref="TreeNode"/>s.
/// That is a trial icon or a dice icon when trial or shuffling mode is set.
/// </summary>
/// <param name="sender">Source of the event.</param>
/// <param name="e">A <see cref="DrawTreeNodeEventArgs"/> that contains the event data.</param>
private void trvSlideshow_DrawNode(object sender, DrawTreeNodeEventArgs e)
{
e.DrawDefault = true;
Rectangle idBounds = e.Node.Bounds;
idBounds.Offset(e.Node.Bounds.Width + 2, 0);
string idString = "(ID:" + e.Node.Name + ")";
e.Graphics.DrawString(idString, this.trvSlideshow.Font, Brushes.Black, idBounds.Location);
SizeF textSize = e.Graphics.MeasureString(idString, this.trvSlideshow.Font);
// If the randomize flag is set, draw a dice icon
// to the right of the label text.
bool randomize = ((SlideshowTreeNode)e.Node).Randomize;
if (randomize)
{
Rectangle diceBounds = e.Node.Bounds;
diceBounds.Offset(e.Node.Bounds.Width + 10 + (int)textSize.Width, 0);
Slideshow.DrawDice(e.Graphics, diceBounds.Location);
}
// If the disabled flag is set, draw a disabled icon
// to the right of the label text.
var node = e.Node as SlideshowTreeNode;
if (node.Slide != null)
{
if (node.Slide.IsDisabled)
{
Rectangle disabledBounds = e.Node.Bounds;
disabledBounds.Offset(e.Node.Bounds.Width + 10 + (int)textSize.Width, 0);
Slideshow.DrawDisabled(e.Graphics, disabledBounds.Location);
}
}
}
