/// <summary>
/// Delegate called when a mouse is mouving on a thumb.
/// </summary>
/// <param name="pSender">The event sender.</param>
/// <param name="pEventArgs">The event arguments.</param>
private void OnThumbPreviewMouseMove(object pSender, MouseEventArgs pEventArgs)
{
Thumb lThumb = pSender as Thumb;
if (lThumb == null)
{
return;
}
GridViewColumn lColumn = this.FindParentColumn(lThumb);
if (lColumn == null)
{
return;
}
// Suppress column resizing for fixed and range fill columns.
if (FixedColumn.IsFixedColumn(lColumn) || this.IsFillColumn(lColumn))
{
// Cursor is hidden.
lThumb.Cursor = null;
return;
}
// Check range column bounds.
if (lThumb.IsMouseCaptured && RangeColumn.IsRangeColumn(lColumn))
{
double?lMinWidth = RangeColumn.GetRangeMinWidth(lColumn);
double?lMaxWidth = RangeColumn.GetRangeMaxWidth(lColumn);
if ((lMinWidth.HasValue && lMaxWidth.HasValue) && (lMinWidth > lMaxWidth))
{
// Invalid case.
return;
}
if (this.mBackCursor == null)
{
// First time = save the resize cursor.
this.mBackCursor = lThumb.Cursor;
}
// Updating the cursor.
if (lMinWidth.HasValue && lColumn.Width <= lMinWidth.Value)
{
lThumb.Cursor = Cursors.No;
}
else if (lMaxWidth.HasValue && lColumn.Width >= lMaxWidth.Value)
{
lThumb.Cursor = Cursors.No;
}
else
{
lThumb.Cursor = this.mBackCursor;
}
}
}
/// <summary>
/// Initialize the columns by applying there properties.
/// </summary>
private void InitColumns()
{
if (this.mListView.View == null)
{
return;
}
foreach (GridViewColumn lColumn in this.mListView.View.Columns)
{
if (RangeColumn.IsRangeColumn(lColumn) == false)
{
continue;
}
double?lMinWidth = RangeColumn.GetRangeMinWidth(lColumn);
double?lMaxWidth = RangeColumn.GetRangeMaxWidth(lColumn);
if (lMinWidth.HasValue == false && lMaxWidth.HasValue == false)
{
continue;
}
GridViewColumnHeader lColumnHeader = this.FindColumnHeader(this.mListView, lColumn);
if (lColumnHeader == null)
{
continue;
}
double lActualWidth = lColumnHeader.ActualWidth;
if (lMinWidth.HasValue)
{
lColumnHeader.MinWidth = lMinWidth.Value;
if (!double.IsInfinity(lActualWidth) && lActualWidth < lColumnHeader.MinWidth)
{
lColumn.Width = lColumnHeader.MinWidth;
}
}
if (lMaxWidth.HasValue)
{
lColumnHeader.MaxWidth = lMaxWidth.Value;
if (double.IsInfinity(lActualWidth) == false && lActualWidth > lColumnHeader.MaxWidth)
{
lColumn.Width = lColumnHeader.MaxWidth;
}
}
}
}
/// <summary>
/// Delegate called when a column width change.
/// </summary>
/// <param name="pSender">The event sender.</param>
/// <param name="pEventArgs">The event arguments.</param>
private void OnGridColumnWidthChanged(object pSender, EventArgs pEventArgs)
{
if (this.mLoaded == false)
{
return;
}
GridViewColumn lColumn = pSender as GridViewColumn;
if (lColumn == null)
{
return;
}
// Suppress column resizing for fixed columns.
if (FixedColumn.IsFixedColumn(lColumn))
{
return;
}
// Ensure range column within the bounds.
if (RangeColumn.IsRangeColumn(lColumn))
{
// Special case: auto column width - maybe conflicts with min/max range.
if (lColumn != null && lColumn.Width.Equals(double.NaN))
{
// Resize is handled by the change header size event.
this.mAutoSizedColumn = lColumn;
return;
}
// ensure column bounds
if (Math.Abs(this.SetRangeColumnToBounds(lColumn) - 0) > ZERO_WIDTH_RANGE)
{
return;
}
}
// Force resize.
this.DoResizeColumns(this.mListView.View.Columns.IndexOf(lColumn));
}