public KeyValueListBox()
{
Items = new AeList <KeyValueListItem>();
Items.ItemAddedEvent += Items_ItemAddedEvent;
Items.ItemInsertedEvent += Items_ItemInsertedEvent;
Items.ItemRemovedEvent += Items_ItemRemovedEvent;
Items.ItemsClearedEvent += Items_ItemsClearedEvent;
InitializeComponent();
flowPanel.ControlAdded += (s, e) =>
{
Control c = e.Control;
c.Width = flowPanel.Width - 1;
c.Margin = ItemsPadding;
if (c.Height + c.Top >= Height)
{
isUseScrollBar = true;
ChangeControlsWidth(isUseScrollBar);
}
};
flowPanel.ControlRemoved += (s, e) =>
{
// 如果控件通过其他方式移除(非Items中移除)，需要在Items中将其移除
Items.Remove((KeyValueListItem)e.Control);
var controls = flowPanel.Controls;
int count = controls.Count;
if (count == 0)
{
return;
}
Control c = controls[count - 1];
if (c.Height + c.Top >= Height)
{
isUseScrollBar = false;
ChangeControlsWidth(isUseScrollBar);
}
};
flowPanel.SizeChanged += (s, e) =>
{
var controls = flowPanel.Controls;
int count = controls.Count;
if (count == 0)
{
return;
}
Control c = controls[count - 1];
isUseScrollBar = (c.Height + c.Top >= Height);
ChangeControlsWidth(isUseScrollBar);
};
}
private void Items_ItemInsertedEvent(AeList <KeyValueListItem> list, ListItemsChangedEventArgs <KeyValueListItem> e)
{
// 不能做插入操作，当添加处理
Items_ItemAddedEvent(list, e);
}
private void Items_ItemAddedEvent(AeList <KeyValueListItem> list, ListItemsChangedEventArgs <KeyValueListItem> e)
{
flowPanel.Controls.Add(e.Item);
}
private void Items_ItemsClearedEvent(AeList <KeyValueListItem> list, EventArgs e)
{
flowPanel.Controls.Clear();
}
