public override UIElement[] CreateLabels(ITicksInfo <DateTime> ticksInfo)
        {
            object info  = ticksInfo.Info;
            var    ticks = ticksInfo.Ticks;

            UIElement[] res       = new UIElement[ticks.Length - 1];
            int         labelsNum = 3;

            if (info is DifferenceIn)
            {
                DifferenceIn diff = (DifferenceIn)info;
                DateFormat = GetDateFormat(diff);
            }
            else if (info is MajorLabelsInfo)
            {
                MajorLabelsInfo mInfo = (MajorLabelsInfo)info;
                DifferenceIn    diff  = (DifferenceIn)mInfo.Info;
                DateFormat = GetDateFormat(diff);
                labelsNum  = mInfo.MajorLabelsCount + 1;

                //DebugVerify.Is(labelsNum < 100);
            }

            DebugVerify.Is(ticks.Length < 10);

            LabelTickInfo <DateTime> tickInfo = new LabelTickInfo <DateTime>();

            for (int i = 0; i < ticks.Length - 1; i++)
            {
                tickInfo.Info = info;
                tickInfo.Tick = ticks[i];

                string tickText = GetString(tickInfo);

                Grid grid = new Grid {
                };

                // doing binding as described at http://sdolha.spaces.live.com/blog/cns!4121802308C5AB4E!3724.entry?wa=wsignin1.0&sa=835372863

                grid.SetBinding(Grid.BackgroundProperty, new Binding {
                    Path = new PropertyPath("(0)", DateTimeAxis.MajorLabelBackgroundBrushProperty), RelativeSource = new RelativeSource(RelativeSourceMode.FindAncestor)
                    {
                        AncestorType = typeof(AxisControlBase)
                    }
                });
                Rectangle rect = new Rectangle
                {
                    StrokeThickness = 2
                };
                rect.SetBinding(Rectangle.StrokeProperty, new Binding {
                    Path = new PropertyPath("(0)", DateTimeAxis.MajorLabelRectangleBorderPropertyProperty), RelativeSource = new RelativeSource(RelativeSourceMode.FindAncestor)
                    {
                        AncestorType = typeof(AxisControlBase)
                    }
                });

                Grid.SetColumn(rect, 0);
                Grid.SetColumnSpan(rect, labelsNum);

                for (int j = 0; j < labelsNum; j++)
                {
                    grid.ColumnDefinitions.Add(new ColumnDefinition());
                }

                grid.Children.Add(rect);

                for (int j = 0; j < labelsNum; j++)
                {
                    var tb = new TextBlock
                    {
                        Text = tickText,
                        HorizontalAlignment = HorizontalAlignment.Center,
                        Margin = new Thickness(0, 3, 0, 3)
                    };
                    Grid.SetColumn(tb, j);
                    grid.Children.Add(tb);
                }

                ApplyCustomView(tickInfo, grid);

                res[i] = grid;
            }

            return(res);
        }
예제 #2
0
        private void DoDrawMajorLabels()
        {
            ITicksProvider <T> majorTicksProvider = ticksProvider.MajorProvider;

            additionalLabelsCanvas.Children.Clear();

            if (majorTicksProvider != null && majorLabelProvider != null)
            {
                additionalLabelsCanvas.Visibility = Visibility.Visible;

                Size renderSize = RenderSize;
                var  majorTicks = majorTicksProvider.GetTicks(range, DefaultTicksProvider.DefaultTicksCount);

                double[] screenCoords = majorTicks.Ticks.Select(tick => createDataPoint(convertToDouble(tick))).
                                        Select(p => p.DataToScreen(transform)).Select(p => getCoordinate(p)).ToArray();

                // todo this is not the best decision - when displaying, for example,
                // milliseconds, it causes to create hundreds and thousands of textBlocks.
                double rangesRatio = GetRangesRatio(majorTicks.Ticks.GetPairs().ToArray()[0], range);

                object          info    = majorTicks.Info;
                MajorLabelsInfo newInfo = new MajorLabelsInfo
                {
                    Info             = info,
                    MajorLabelsCount = (int)Math.Ceiling(rangesRatio)
                };

                var newMajorTicks = new TicksInfo <T>
                {
                    Info      = newInfo,
                    Ticks     = majorTicks.Ticks,
                    TickSizes = majorTicks.TickSizes
                };

                UIElement[] additionalLabels = MajorLabelProvider.CreateLabels(newMajorTicks);

                for (int i = 0; i < additionalLabels.Length; i++)
                {
                    if (screenCoords[i].IsNaN())
                    {
                        continue;
                    }

                    UIElement tickLabel = additionalLabels[i];

                    tickLabel.Measure(renderSize);

                    StackCanvas.SetCoordinate(tickLabel, screenCoords[i]);
                    StackCanvas.SetEndCoordinate(tickLabel, screenCoords[i + 1]);

                    if (tickLabel is FrameworkElement)
                    {
                        ((FrameworkElement)tickLabel).LayoutTransform = additionalLabelTransform;
                    }

                    additionalLabelsCanvas.Children.Add(tickLabel);
                }
            }
            else
            {
                additionalLabelsCanvas.Visibility = Visibility.Collapsed;
            }
        }