Пример #1
0
        }         // ThumbPreviewMouseLeftButtonDown

        // ----------------------------------------------------------------------
        private void GridColumnWidthChanged(object sender, EventArgs e)
        {
            if (!this.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.Width.Equals(double.NaN))
                {
                    this.autoSizedColumn = gridViewColumn;
                    return;                     // handled by the change header size event
                }

                // ensure column bounds
                if (SetRangeColumnToBounds(gridViewColumn) != 0)
                {
                    return;
                }
            }

            DoResizeColumns();
        }         // GridColumnWidthChanged
Пример #2
0
        }         // 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;
                return;
            }
        }         // ThumbPreviewMouseLeftButtonDown
Пример #3
0
        }         // ListViewUnloaded

        // ----------------------------------------------------------------------
        private void ThumbPreviewMouseMove(object sender, MouseEventArgs e)
        {
            Thumb          thumb          = sender as Thumb;
            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 (this.resizeCursor == null)
                {
                    this.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 = this.resizeCursor;                     // between valid min/max
                }
            }
        }         // ThumbPreviewMouseMove
Пример #4
0
        }         // InitColumns

        // ----------------------------------------------------------------------
        protected virtual void ResizeColumns()
        {
            if (listView == null || listView.Columns.Count == 0)
            {
                return;
            }

            // listview width
            double actualWidth = double.PositiveInfinity;

            if (this.scrollViewer != null)
            {
                actualWidth = this.scrollViewer.ViewportWidth;
            }
            if (double.IsInfinity(actualWidth))
            {
                actualWidth = this.listView.ActualWidth;
            }
            if (double.IsInfinity(actualWidth) || actualWidth <= 0)
            {
                return;
            }

            double resizeableRegionCount = 0;
            double otherColumnsWidth     = 0;

            // determine column sizes
            foreach (GridViewColumn gridViewColumn in listView.Columns)
            {
                if (ProportionalColumn.IsProportionalColumn(gridViewColumn))
                {
                    resizeableRegionCount += ProportionalColumn.GetProportionalWidth(gridViewColumn).Value;
                }
                else
                {
                    otherColumnsWidth += gridViewColumn.ActualWidth;
                }
            }

            if (resizeableRegionCount <= 0)
            {
                // no proportional columns present: commit the regulation to the scroll viewer
                this.scrollViewer.HorizontalScrollBarVisibility = ScrollBarVisibility.Auto;

                // search the first fill column
                GridViewColumn fillColumn = null;
                for (int i = 0; i < listView.Columns.Count; i++)
                {
                    GridViewColumn gridViewColumn = listView.Columns[i];
                    if (IsFillColumn(gridViewColumn))
                    {
                        fillColumn = gridViewColumn;
                        break;
                    }
                }

                if (fillColumn != null)
                {
                    double otherColumnsWithoutFillWidth = otherColumnsWidth - fillColumn.ActualWidth;
                    double fillWidth = actualWidth - otherColumnsWithoutFillWidth;
                    if (fillWidth > 0)
                    {
                        double?minWidth = RangeColumn.GetRangeMinWidth(fillColumn);
                        double?maxWidth = RangeColumn.GetRangeMaxWidth(fillColumn);

                        bool setWidth = true;
                        if (minWidth.HasValue && fillWidth < minWidth.Value)
                        {
                            setWidth = false;
                        }
                        if (maxWidth.HasValue && fillWidth > maxWidth.Value)
                        {
                            setWidth = false;
                        }
                        if (setWidth)
                        {
                            this.scrollViewer.HorizontalScrollBarVisibility = ScrollBarVisibility.Hidden;
                            fillColumn.Width = fillWidth;
                        }
                    }
                }
                return;
            }

            double resizeableColumnsWidth = actualWidth - otherColumnsWidth;

            if (resizeableColumnsWidth <= 0)
            {
                return;                 // missing space
            }

            // resize columns
            double resizeableRegionWidth = resizeableColumnsWidth / resizeableRegionCount;

            foreach (GridViewColumn gridViewColumn in listView.Columns)
            {
                if (ProportionalColumn.IsProportionalColumn(gridViewColumn))
                {
                    gridViewColumn.Width = ProportionalColumn.GetProportionalWidth(gridViewColumn).Value *resizeableRegionWidth;
                }
            }
        }         // ResizeColumns