protected Brush GetBackBrush(DrawListViewSubItemEventArgs e)
{
int index = e.ItemIndex % ProtoListControlHelp.DefaultFocusColors.Count;
Color c = ProtoListControlHelp.DefaultBackColors[index];
return(new SolidBrush(ProtoListControlHelp.CheckEnabled(c, Enabled)));
}
protected Brush GetForeBrush(DrawItemEventArgs e)
{
if (GetFocused(e))
{
return(new SolidBrush(ProtoListControlHelp.DefaultForeColorOnFocus));
}
return(new SolidBrush(ProtoListControlHelp.CheckEnabled(ForeColor, Enabled)));
}
protected virtual Brush GetBrush()
{
if (ForeBrush != null)
{
return(ForeBrush);
}
if (DataColor != default(Color))
{
return(new SolidBrush(ProtoListControlHelp.CheckEnabled(DataColor, Enabled)));
}
return(new SolidBrush(Color.Gray));
}
protected Brush GetForeBrush(DrawListViewItemEventArgs e)
{
Color c;
if (GetFocused(e))
{
c = ProtoListControlHelp.DefaultForeColorOnFocus;
}
else
{
c = ForeColor;
}
return(new SolidBrush(ProtoListControlHelp.CheckEnabled(c, Enabled)));
}
protected Brush GetBackBrush(DrawItemEventArgs e)
{
if (!(this.DroppedDown || Focused))
{
return(new SolidBrush(this.BackColor));
}
if (GetFocused(e))
{
return(ProtoListControlHelp.GetFocusBrush(e.Bounds, BackColor));
}
int index = e.Index % ProtoListControlHelp.DefaultFocusColors.Count;
Color c = ProtoListControlHelp.DefaultBackColors[index];
return(new SolidBrush(ProtoListControlHelp.CheckEnabled(c, Enabled)));
}
protected override void OnDrawItem(DrawListViewItemEventArgs e)
{
if (e.ItemIndex < 0 || e.ItemIndex >= Items.Count)
{
return;
}
if (Items.Count == 0 && Focused)
{
ProtoListControlHelp.DrawFocusRectangle(e.Graphics, e.Bounds);
return;
}
Rectangle Bounds = new Rectangle(e.Bounds.X, e.Bounds.Y, this.ClientSize.Width, e.Bounds.Height);
// TODO：修正焦点条被截断的问题。
// 描绘背景图形
e.Graphics.FillRectangle(GetBackBrush(e), Bounds);
if (GetFocused(e))
{
e.Graphics.FillRectangle(ProtoListControlHelp.GetFocusBrush(e.Bounds, BackColor), e.Bounds);
ProtoListControlHelp.DrawFocusRectangle(e.Graphics, e.Bounds);
}
// 子类描绘调用
foreach (ListViewItem.ListViewSubItem item in e.Item.SubItems)
{
OnDrawSubItem(new DrawListViewSubItemEventArgs(
e.Graphics, item.Bounds, e.Item, item, e.ItemIndex, 0, null, e.State));
}
// 补齐剩余部分
if (e.ItemIndex == Items.Count - 1)
{
int cy = e.Bounds.Y + e.Bounds.Height, count = e.ItemIndex % ProtoListControlHelp.DefaultBackColors.Count;
while (cy <= this.ClientRectangle.Height)
{
count = (count + 1) % ProtoListControlHelp.DefaultBackColors.Count;
SolidBrush ExtraBackBrush = new SolidBrush(ProtoListControlHelp.
CheckEnabled(ProtoListControlHelp.DefaultBackColors[count], Enabled));
e.Graphics.FillRectangle(ExtraBackBrush, new Rectangle(e.Bounds.X, cy, this.ClientSize.Width, e.Bounds.Height));
cy += e.Bounds.Height;
}
}
}
protected Color CheckEnabled(Color c)
{
return(ProtoListControlHelp.CheckEnabled(c, Enabled));
}