public DrawNodeEventArgs(Graphics graphics, Rectangle bounds, FileSystemNode node, bool enabled, bool selected, bool hovered, bool controlHasFocus)
{
Graphics = graphics;
Bounds = bounds;
Node = node;
Enabled = enabled;
Selected = selected;
Hovered = hovered;
ControlHasFocus = controlHasFocus;
Handled = false;
}
/// <summary>
/// Renders a list item.
/// </summary>
/// <param name="graphics">The graphics object to draw on.</param>
/// <param name="bounds">Bounds of the item.</param>
/// <param name="node">The node to draw.</param>
/// <param name="enabled">Whether the item is enabled.</param>
/// <param name="selected">Whether the item is selected.</param>
/// <param name="hovered">Whether the mouse cursor is over the item.</param>
/// <param name="controlHasFocus">Whether the control has input focus.</param>
public void DrawItem(Graphics graphics, Rectangle bounds, FileSystemNode node, bool enabled, bool selected, bool hovered, bool controlHasFocus)
{
DrawNodeEventArgs e = new DrawNodeEventArgs(graphics, bounds, node, enabled, selected, hovered, controlHasFocus);
OnDrawBackground(e);
OnDrawBorder(e);
if (e.Node.IsPathValid)
{
OnDrawContents(e);
}
else
{
OnDrawErrorMessage(e);
}
}
/// <summary>
/// Gets the minimum height of an item.
/// </summary>
/// <param name="node">The node to measure.</param>
/// <returns>Minimum item height.</returns>
public int GetTextHeight(FileSystemNode node)
{
var e = new GetLineCountEventArgs(node);
OnGetLineCount(e);
float textHeight = 0;
for (int i = 0; i < e.LineCount; i++)
{
var eh = new GetLineHeightEventArgs(node, i);
textHeight += eh.LineHeight > 0 ? eh.LineHeight : Font.Height;
}
textHeight += (e.LineCount - 1) * Font.Height * LineSpacing;
return((int)textHeight);
}
/// <summary>
/// Gets the minimum height of an item.
/// </summary>
/// <param name="node">The node to measure.</param>
/// <returns>Minimum item height.</returns>
public int GetItemHeight(FileSystemNode node)
{
var e = new GetLineCountEventArgs(node);
OnGetLineCount(e);
float textHeight = 0;
for (int i = 0; i < e.LineCount; i++)
{
var eh = new GetLineHeightEventArgs(node, i);
textHeight += eh.LineHeight > 0 ? eh.LineHeight : Font.Height;
}
textHeight += (e.LineCount - 1) * Font.Height * LineSpacing;
float maxHeight = Math.Max(textHeight, ThumbnailSize.Height);
return((int)(maxHeight + 2 * ContentPadding.Height));
}
public GetLineHeightEventArgs(FileSystemNode node, int lineIndex)
{
Node = node;
LineIndex = lineIndex;
LineHeight = -1;
}
public GetLineCountEventArgs(FileSystemNode node)
{
Node = node;
LineCount = 0;
}
public DrawNodeLineEventArgs(Graphics graphics, Rectangle bounds, FileSystemNode node, bool enabled, bool selected, bool hovered, bool controlHasFocus, int lineIndex)
: base(graphics, bounds, node, enabled, selected, hovered, controlHasFocus)
{
LineIndex = lineIndex;
}
