private void PaintGroup(Graphics graphics, ToolboxGroup group, SolidBrush backgroundBrush, ref int offset)
{
group.Top = offset;
offset += 19;
SolidBrush groupBrush = new SolidBrush(groupColor);
Rectangle groupRect = new Rectangle(1, group.Top, this.Width - 1, 18);
graphics.FillRectangle(groupBrush, groupRect);
groupBrush.Dispose();
Pen backgroundPen = new Pen(backgroundBrush);
int lineLocation = group.Top + 16;
graphics.DrawLine(backgroundPen,
1,
lineLocation,
this.Width - 1,
lineLocation);
backgroundPen.Dispose();
graphics.DrawString(group.Caption,
this.Font,
Brushes.Black,
new RectangleF(20, group.Top + 2, this.Width - 30, group.Top + 13));
if (group.Expanded)
{
graphics.DrawImage(Properties.Resources.minus, new Point(6, group.Top + 4));
foreach (ToolboxItem item in group.Items)
{
PaintItem(graphics, item, backgroundBrush, ref offset);
}
}
else
{
graphics.DrawImage(Properties.Resources.plus, new Point(6, group.Top + 4));
foreach (ToolboxItem item in group.Items)
{
item.Top = -1;
}
}
}
private void GroupMouseDown(ToolboxGroup group)
{
if (group == null)
{
return;
}
group.Expanded = !group.Expanded;
if (group.Expanded)
{
this.AutoScrollMinSize = new Size(this.Width - 30, this.AutoScrollMinSize.Height + group.ItemHeight);
}
else
{
this.AutoScrollMinSize = new Size(this.Width - 30, this.AutoScrollMinSize.Height - group.ItemHeight);
}
Invalidate(this.ClientRectangle);
}