protected override void OnMouseClick(MouseEventArgs e)
{
base.OnMouseClick(e);
ScrollableListItem item = HitTest(e.Location);
if (item == null)
{
return;
}
//设置选择状态
bool bSelectChange = false;
if (item.Selected)
{
if (this.ToggleSelection)
{
item.Selected = false;
this.SelectedItems.Remove(item);
bSelectChange = true;
}
}
else
{
if (!this.MultipleSelect)
{
//只能单选时
foreach (ScrollableListItem i in this.SelectedItems)
{
i.Selected = false;
}
this.SelectedItems.Clear();
}
item.Selected = true;
this.SelectedItems.Add(item);
bSelectChange = true;
}
//触发点击事件
ItemClickedEventArgs args = new ItemClickedEventArgs(item, e.Button, e.Location);
OnItemClicked(args);
if (bSelectChange)
{
//触发选择变化事件
OnSelectionChanged(new EventArgs());
}
//描绘选择状态
this.Invalidate(item.Bounds);
}
protected virtual void OnItemClicked(ItemClickedEventArgs args)
{
ItemClicked?.Invoke(this, args);
}
