void MeasureImage(IListBoxExItem item, ref int width, ref int height)
{
if (item.Image == null)
{
return;
}
width = Math.Max(ItemPadding.Left + ItemPadding.Right + item.Image.Width, width);
height = Math.Max(ItemPadding.Top + ItemPadding.Bottom + item.Image.Height, height);
}
void MeasureCaptionSize(Graphics g, IListBoxExItem item, ref int width, ref int height)
{
if (item.DisplayText.IsNullOrEmpty())
{
return;
}
var font = ShowDescription ? CaptionFont : _listControl.Font;
//获得文字区最大长度，准备换行
var maxTextWidth = width - (item.Image == null ? 0 : item.Image.Width) - ImageTextSpace - ItemPadding.Left - ItemPadding.Right;
var size = g.MeasureString(item.DisplayText, font, maxTextWidth > 10 ? maxTextWidth : width);
var sizeDescription = SizeF.Empty;
var space = 0;
if (ShowDescription && !item.Description.IsNullOrEmpty())
{
sizeDescription = g.MeasureString(item.Description, _listControl.Font, maxTextWidth);
space = DescriptionSpace;
}
height = Math.Max(height, ItemPadding.Top + ItemPadding.Bottom + space + (int)size.Height + (int)sizeDescription.Height);
}
