} // 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 += new MouseEventHandler(ThumbPreviewMouseMove); thumb.PreviewMouseLeftButtonDown += new MouseButtonEventHandler(ThumbPreviewMouseLeftButtonDown); DependencyPropertyDescriptor.FromProperty( GridViewColumn.WidthProperty, typeof(GridViewColumn)).AddValueChanged(gridViewColumn, GridColumnWidthChanged); } } } else if (childVisual is GridViewColumnHeader) { GridViewColumnHeader columnHeader = childVisual as GridViewColumnHeader; columnHeader.SizeChanged += new SizeChangedEventHandler(GridColumnHeaderSizeChanged); } else if (scrollViewer == null && childVisual is ScrollViewer) { scrollViewer = childVisual as ScrollViewer; scrollViewer.ScrollChanged += new ScrollChangedEventHandler(ScrollViewerScrollChanged); // assume we do the regulation of the horizontal scrollbar scrollViewer.HorizontalScrollBarVisibility = HorizontalScrollBarVisibility; 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 -= new MouseEventHandler(ThumbPreviewMouseMove); thumb.PreviewMouseLeftButtonDown -= new MouseButtonEventHandler(ThumbPreviewMouseLeftButtonDown); DependencyPropertyDescriptor.FromProperty( GridViewColumn.WidthProperty, typeof(GridViewColumn)).RemoveValueChanged(gridViewColumn, GridColumnWidthChanged); } } } else if (childVisual is GridViewColumnHeader) { GridViewColumnHeader columnHeader = childVisual as GridViewColumnHeader; columnHeader.SizeChanged -= new SizeChangedEventHandler(GridColumnHeaderSizeChanged); } else if (scrollViewer == null && childVisual is ScrollViewer) { scrollViewer = childVisual as ScrollViewer; scrollViewer.ScrollChanged -= new ScrollChangedEventHandler(ScrollViewerScrollChanged); } UnregisterEvents(childVisual); // recursive } } // UnregisterEvents