} // ThumbPreviewMouseMove // ---------------------------------------------------------------------- private void ThumbPreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e) { Thumb thumb = sender as Thumb; GridViewColumn gridViewColumn = FindParentColumn(thumb); // suppress column resizing for proportional, fixed and range fill columns if (ProportionalColumn.IsProportionalColumn(gridViewColumn) || FixedColumn.IsFixedColumn(gridViewColumn) || IsFillColumn(gridViewColumn)) { e.Handled = true; } } // ThumbPreviewMouseLeftButtonDown
} // Refresh // ---------------------------------------------------------------------- private void RegisterEvents(DependencyObject start) { for (int i = 0; i < VisualTreeHelper.GetChildrenCount(start); i++) { Visual childVisual = VisualTreeHelper.GetChild(start, i) as Visual; if (childVisual is Thumb) { GridViewColumn gridViewColumn = FindParentColumn(childVisual); if (gridViewColumn != null) { Thumb thumb = childVisual as Thumb; if (ProportionalColumn.IsProportionalColumn(gridViewColumn) || FixedColumn.IsFixedColumn(gridViewColumn) || IsFillColumn(gridViewColumn)) { thumb.IsHitTestVisible = false; } else { thumb.PreviewMouseMove += ThumbPreviewMouseMove; thumb.PreviewMouseLeftButtonDown += ThumbPreviewMouseLeftButtonDown; DependencyPropertyDescriptor.FromProperty( GridViewColumn.WidthProperty, typeof(GridViewColumn)).AddValueChanged(gridViewColumn, GridColumnWidthChanged); } } } else if (childVisual is GridViewColumnHeader) { GridViewColumnHeader columnHeader = childVisual as GridViewColumnHeader; columnHeader.SizeChanged += GridColumnHeaderSizeChanged; } else if (_scrollViewer == null && childVisual is ScrollViewer) { _scrollViewer = childVisual as ScrollViewer; _scrollViewer.ScrollChanged += ScrollViewerScrollChanged; // assume we do the regulation of the horizontal scrollbar _scrollViewer.HorizontalScrollBarVisibility = ScrollBarVisibility.Hidden; _scrollViewer.VerticalScrollBarVisibility = _verticalScrollBarVisibility; } RegisterEvents(childVisual); // recursive } } // RegisterEvents
} // RegisterEvents // ---------------------------------------------------------------------- private void UnregisterEvents(DependencyObject start) { for (int i = 0; i < VisualTreeHelper.GetChildrenCount(start); i++) { Visual childVisual = VisualTreeHelper.GetChild(start, i) as Visual; if (childVisual is Thumb) { GridViewColumn gridViewColumn = FindParentColumn(childVisual); if (gridViewColumn != null) { Thumb thumb = childVisual as Thumb; if (ProportionalColumn.IsProportionalColumn(gridViewColumn) || FixedColumn.IsFixedColumn(gridViewColumn) || IsFillColumn(gridViewColumn)) { thumb.IsHitTestVisible = true; } else { thumb.PreviewMouseMove -= ThumbPreviewMouseMove; thumb.PreviewMouseLeftButtonDown -= ThumbPreviewMouseLeftButtonDown; DependencyPropertyDescriptor.FromProperty( GridViewColumn.WidthProperty, typeof(GridViewColumn)).RemoveValueChanged(gridViewColumn, GridColumnWidthChanged); } } } else if (childVisual is GridViewColumnHeader) { GridViewColumnHeader columnHeader = childVisual as GridViewColumnHeader; columnHeader.SizeChanged -= GridColumnHeaderSizeChanged; } else if (_scrollViewer == null && childVisual is ScrollViewer) { _scrollViewer = childVisual as ScrollViewer; _scrollViewer.ScrollChanged -= ScrollViewerScrollChanged; } UnregisterEvents(childVisual); // recursive } } // UnregisterEvents