private bool IsDataChange(eDataChange changeType)
{
return ((_DataChangeType & changeType) == changeType);
}
protected override void OnDataSourceChanged(EventArgs e)
{
if (_MultiColumnDisplay != null)
_MultiColumnDisplay.DataSource = null;
_DataChangeType |= eDataChange.DataSourceChanged;
base.OnDataSourceChanged(e);
}
protected override void OnBindingContextChanged(EventArgs e)
{
_DataChangeType |= eDataChange.BindingContextChanged;
base.OnBindingContextChanged(e);
}
private void OpenMultiColumnDropDown()
{
_PopupController = null;
_MultiColumnDisplay = null;
if (_PopupController == null)
{
_PopupController = new PopupHostController();
_PopupController.Closed += PopupControllerClosed;
}
if (_MultiColumnDisplay == null)
{
_MultiColumnDisplay = CreateMultiColumnDisplayControl();
_DataChangeType = eDataChange.All;
}
if (IsDataChange(eDataChange.BindingContextChanged))
_MultiColumnDisplay.BindingContext = this.BindingContext;
if (_MultiColumnDisplay.DataSource != this.DataSource)
{
_DataChangeType = eDataChange.All;
}
if (IsDataChange(eDataChange.DataSourceChanged))
{
_MultiColumnDisplay.DataSource = this.DataSource;
}
if (IsDataChange(eDataChange.DropDownColumnsChanged))
_MultiColumnDisplay.DisplayMembers = _DropDownColumns;
if (!_PopupController.PopupUserSize || !_PreservePopupSize)
{
_MultiColumnDisplay.Height = this.DropDownHeight;
_MultiColumnDisplay.Width = this.DropDownWidth;
}
//tuyenhm
if (this._MultiColumnDisplay != null)
{
if (this._MultiColumnDisplay.Columns.Count > 0)
{
this._MultiColumnDisplay.Columns[0].Width.Absolute = _Col1Width;
}
if (this._MultiColumnDisplay.Columns.Count > 1)
{
this._MultiColumnDisplay.Columns[1].Width.Absolute = _Col2Width;
}
if (this._MultiColumnDisplay.Columns.Count > 2)
{
this._MultiColumnDisplay.Columns[2].Width.Absolute = _Col3Width;
}
}
CancelEventArgs cancelArgs = new CancelEventArgs();
OnBeforeMultiColumnPopupOpen(cancelArgs);
if (cancelArgs.Cancel)
return;
Point location = PointToScreen(new Point(0, Height));
ePopupResizeEdge resize = _EnablePopupResize ? ePopupResizeEdge.BottomRight : ePopupResizeEdge.None;
_PopupController.Show(_MultiColumnDisplay, location.X, location.Y, Width, Height, resize);
if (_MultiColumnDisplay.SelectedNode != null)
_MultiColumnDisplay.SelectedNode.EnsureVisible();
_DroppedDown = true;
_MultiDropDownOpenedAtTime = DateTime.Now;
_DataChangeType = eDataChange.None;
base.OnDropDown(EventArgs.Empty);
}
