} // 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
