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Anna
660
ExpansionIndicator doesn't work correctly
posted
If I do this (Actions 1):    public Constructor()      {            ...xamDataGrid1.MouseLeftButtonDown += new MouseButtonEventHandler(xamDataGrids_MouseDown);} void xamDataGrids_MouseDown(object sender, MouseButtonEventArgs e)      {...}And result: my procedure xamDataGrids_MouseDown doesn't called, but ExpancionIndicator works correctly for every DataRecords in grid:
  1. When I press on “+” ExpansionIndicator by LeftMouseButton, it changing for “-”, and activ datarecord.IsExpand = true, and all child collection of this active datarecord I able to see.
  2. but when ExpansionIndicator has not pressed (released) by LeftMouseButton, the datarecord.IsExpand = true, and all child collection of this active datarecord I still can see, and icon of ExpansionIndicator is “-”.
  If I do this(Actions 2):    public Constructor()      {            ...xamDataGrid1.PreviewMouseDown += new MouseButtonEventHandler(xamDataGrids_MouseDown);} void xamDataGrids_MouseDown(object sender, MouseButtonEventArgs e)      {...      e.Handled = false; //this action nothing change} And result: my procedure xamDataGrids_MouseDown is called, but ExpancionIndicator doesn’t work correctly for every DataRecords in grid.
  1. When I press on “+” ExpansionIndicator by LeftMouseButton, it changing for “-”, and activ datarecord.IsExpand = true, and all child collection of this active datarecord I can see.
  2. but when ExpansionIndicator has not pressed (released) by LeftMouseButton, the datarecord.IsExpand = false, and all child collection of this active datarecord I can’t see, and icon of ExpansionIndicator is “+”.
 I’d like to do some actions in PreviewMouseDown, but I’d like, that ExpancionIndicator works correctly.  Any Ideas? Thanks for help.

 

  • 4850
    Offline posted

    You can see if you are over the expansion indicator in the Preview event and then return out. e.g.:

    void OnPreviewMouseDown(object sender, MouseButtonEventArgs e)

    {

    DependencyObject source = e.OriginalSource as DependencyObject;if (source != null)

    {

    ExpansionIndicator indicator = source as ExpansionIndicator;

    if (indicator == null)

    indicator = Utilities.GetAncestorFromType(source, typeof(ExpansionIndicator), true) as ExpansionIndicator;

    if (indicator != null)return;

    }

    // do some stuff

    e.Handled = true;

    }