} // 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
} // 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