} // ThumbPreviewMouseLeftButtonDown
// ----------------------------------------------------------------------
private void GridColumnWidthChanged(object sender, EventArgs e)
{
if (!loaded)
{
return;
}
GridViewColumn gridViewColumn = sender as GridViewColumn;
// suppress column resizing for proportional and fixed columns
if (ProportionalColumn.IsProportionalColumn(gridViewColumn) || FixedColumn.IsFixedColumn(gridViewColumn))
{
return;
}
// ensure range column within the bounds
if (RangeColumn.IsRangeColumn(gridViewColumn))
{
// special case: auto column width - maybe conflicts with min/max range
if (gridViewColumn != null && gridViewColumn.Width.Equals(double.NaN))
{
autoSizedColumn = gridViewColumn;
return; // handled by the change header size event
}
// ensure column bounds
if (Math.Abs(SetRangeColumnToBounds(gridViewColumn) - 0) > zeroWidthRange)
{
return;
}
}
DoResizeColumns();
} // GridColumnWidthChanged
} // ListViewUnloaded
// ----------------------------------------------------------------------
private void ThumbPreviewMouseMove(object sender, MouseEventArgs e)
{
Thumb thumb = sender as Thumb;
if (thumb == null)
{
return;
}
GridViewColumn gridViewColumn = FindParentColumn(thumb);
if (gridViewColumn == null)
{
return;
}
// suppress column resizing for proportional, fixed and range fill columns
if (ProportionalColumn.IsProportionalColumn(gridViewColumn) ||
FixedColumn.IsFixedColumn(gridViewColumn) ||
IsFillColumn(gridViewColumn))
{
thumb.Cursor = null;
return;
}
// check range column bounds
if (thumb.IsMouseCaptured && RangeColumn.IsRangeColumn(gridViewColumn))
{
double?minWidth = RangeColumn.GetRangeMinWidth(gridViewColumn);
double?maxWidth = RangeColumn.GetRangeMaxWidth(gridViewColumn);
if ((minWidth.HasValue && maxWidth.HasValue) && (minWidth > maxWidth))
{
return; // invalid case
}
if (resizeCursor == null)
{
resizeCursor = thumb.Cursor; // save the resize cursor
}
if (minWidth.HasValue && gridViewColumn.Width <= minWidth.Value)
{
thumb.Cursor = Cursors.No;
}
else if (maxWidth.HasValue && gridViewColumn.Width >= maxWidth.Value)
{
thumb.Cursor = Cursors.No;
}
else
{
thumb.Cursor = resizeCursor; // between valid min/max
}
}
} // ThumbPreviewMouseMove
} // FindColumnHeader
// ----------------------------------------------------------------------
private void InitColumns()
{
GridView view = listView.View as GridView;
if (view == null)
{
return;
}
foreach (GridViewColumn gridViewColumn in view.Columns)
{
if (!RangeColumn.IsRangeColumn(gridViewColumn))
{
continue;
}
double?minWidth = RangeColumn.GetRangeMinWidth(gridViewColumn);
double?maxWidth = RangeColumn.GetRangeMaxWidth(gridViewColumn);
if (!minWidth.HasValue && !maxWidth.HasValue)
{
continue;
}
GridViewColumnHeader columnHeader = FindColumnHeader(listView, gridViewColumn);
if (columnHeader == null)
{
continue;
}
double actualWidth = columnHeader.ActualWidth;
if (minWidth.HasValue)
{
columnHeader.MinWidth = minWidth.Value;
if (!double.IsInfinity(actualWidth) && actualWidth < columnHeader.MinWidth)
{
gridViewColumn.Width = columnHeader.MinWidth;
}
}
if (maxWidth.HasValue)
{
columnHeader.MaxWidth = maxWidth.Value;
if (!double.IsInfinity(actualWidth) && actualWidth > columnHeader.MaxWidth)
{
gridViewColumn.Width = columnHeader.MaxWidth;
}
}
}
} // InitColumns
