ns.potapov/PIbd-31_PotapovNS_COP_20
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Добавил возможность указать максимальное количество чекнутых Item;
При достижении макс. количества последний чекнутый становится не чекнутым;
This commit is contained in:
Никита Потапов 2024-11-27 23:40:10 +04:00
parent aefab8a83b
commit d5384363ab
1 changed files with 13 additions and 3 deletions
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16
WinFormSolution/Components/UserControlCheckedList.cs
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@ -2,6 +2,8 @@
{ {
public partial class UserControlCheckedList : UserControl public partial class UserControlCheckedList : UserControl
{ {
private List<int> _lastCheckedIndexes = new List<int>();
public int MaxCheckedItemsCount { get; set; } = 1;
private EventHandler _onCheckedItemChangedEvent; private EventHandler _onCheckedItemChangedEvent;
public event EventHandler CheckedItemChanged public event EventHandler CheckedItemChanged
{ {
@ -43,16 +45,24 @@
public void ClearCheckedListBoxValues() public void ClearCheckedListBoxValues()
{ {
checkedListBox.Items.Clear(); checkedListBox.Items.Clear();
_lastCheckedIndexes.Clear();
} }
private void checkedListBox_ItemCheck(object sender, ItemCheckEventArgs e) private void checkedListBox_ItemCheck(object sender, ItemCheckEventArgs e)
{ {
for (int i = 0; i < checkedListBox.Items.Count; i++) if (e.NewValue == CheckState.Checked)
{ {
if (i != e.Index) _lastCheckedIndexes.Add(e.Index);
while (_lastCheckedIndexes.Count > MaxCheckedItemsCount)
{ {
checkedListBox.SetItemChecked(i, false); checkedListBox.SetItemCheckState(_lastCheckedIndexes[0], CheckState.Unchecked);
} }
} }
else if (e.NewValue == CheckState.Unchecked)
{
_lastCheckedIndexes.Remove(e.Index);
}
_onCheckedItemChangedEvent?.Invoke(sender, e); _onCheckedItemChangedEvent?.Invoke(sender, e);
} }
} }