public CheckedListBoxControl()
{
InitializeComponent();
listView1.ItemSelectionChanged +=
(sender, args) => {
ItemCheck?.Invoke(this, new ItemCheckEventArgs(args.ItemIndex, CheckState.Checked, CheckState.Unchecked));
};
}
private void item_CheckStateChanged(object sender, EventArgs e)
{
if (!_handleEvents || (!(sender is CheckBox)))
{
return;
}
var checkBox = (CheckBox)sender;
if ((checkBox.Tag is InternalItem) && checkBox.Enabled)
{
var item = (InternalItem)checkBox.Tag;
ItemCheckEventArgs eventArgs;
int itemIndex = _itemList.IndexOf(item);
if (checkBox.CheckState == CheckState.Checked)
{
eventArgs = new ItemCheckEventArgs(
itemIndex, CheckState.Checked, CheckState.Unchecked);
}
else
{
eventArgs = new ItemCheckEventArgs(
itemIndex, CheckState.Unchecked, CheckState.Checked);
}
if (ItemCheck != null)
{
try
{
_handleEvents = false;
ItemCheck.Invoke(this, eventArgs);
// Note: client might changed NewValue:
checkBox.CheckState = eventArgs.NewValue;
}
finally
{
_handleEvents = true;
}
}
}
}
private void listBox_ItemCheck(object sender, ItemCheckEventArgs e)
{
if (!manuallyFired)
{
// Force the update of the checkeditems
try
{
manuallyFired = true;
SetItemCheckState(e.Index, e.NewValue);
}
finally
{
manuallyFired = false;
}
// Update the combobox's text
displayText = GetTextValue();
Invalidate();
ItemCheck?.Invoke(sender, e);
}
}
internal void OnItemCheck(object sender, ItemCheckEventArgs e)
{
ItemCheck?.Invoke(sender, e);
}
/// <summary> /// Trigger the ItemCheck event /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void OnItemCheck(object sender, ItemCheckEventArgs e) => ItemCheck?.Invoke(this, e);
protected virtual void OnItemCheck(ItemCheckEventArgs e) => ItemCheck?.Invoke(this, e);