85 lines
3.1 KiB
C#
85 lines
3.1 KiB
C#
using System.Threading;
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using System.Windows;
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using System.Windows.Media;
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using System;
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namespace Microsoft.Research.DynamicDataDisplay.PointMarkers
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{
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/// <summary>Renders specified text near the point</summary>
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public class CenteredTextMarker : PointMarker
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{
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public static double DEFAULT_VERTICAL_SHIFT=-20;
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public static double DEFAULT_HORIZONTAL_SHIFT=0;
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public string Text
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{
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get { return (string)GetValue(TextProperty); }
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set { SetValue(TextProperty, value); }
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}
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public static readonly DependencyProperty TextProperty =
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DependencyProperty.Register(
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"Text",
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typeof(string),
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typeof(CenteredTextMarker),
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new FrameworkPropertyMetadata(""));
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public static readonly DependencyProperty VerticalShiftProperty =
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DependencyProperty.Register(
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"VerticalShift",
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typeof(string),
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typeof(CenteredTextMarker),
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new FrameworkPropertyMetadata(""));
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public static readonly DependencyProperty HorizontalShiftProperty =
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DependencyProperty.Register(
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"HorizontalShift",
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typeof(string),
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typeof(CenteredTextMarker),
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new FrameworkPropertyMetadata(""));
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public string VerticalShift
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{
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get { return (string)GetValue(VerticalShiftProperty); }
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set { SetValue(VerticalShiftProperty, value); }
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}
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public string HorizontalShift
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{
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get { return (string)GetValue(HorizontalShiftProperty); }
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set { SetValue(HorizontalShiftProperty, value); }
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}
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public override void Render(DrawingContext dc, Point screenPoint)
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{
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FormattedText textToDraw = new FormattedText(Text, Thread.CurrentThread.CurrentCulture,
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FlowDirection.LeftToRight, new Typeface("Arial"), 12, Brushes.Black,1.0);
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double width = textToDraw.Width;
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double height = textToDraw.Height;
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double verticalShift = DEFAULT_VERTICAL_SHIFT; // px
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if (null != VerticalShift&&!"".Equals(VerticalShift))verticalShift = double.Parse(VerticalShift);
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double horizontalShift=DEFAULT_HORIZONTAL_SHIFT;
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if (null != HorizontalShift&&!"".Equals(HorizontalShift)) horizontalShift = double.Parse(HorizontalShift);
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// Rect bounds = RectExtensions.FromCenterSize(new Point(screenPoint.X+horizontalShift, screenPoint.Y + verticalShift - height / 2),new Size(width, height));
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double xPoint=0.00;
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double yPoint=0.00;
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if(0.00==horizontalShift)xPoint=screenPoint.X+horizontalShift;
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else xPoint=screenPoint.X+horizontalShift - width/2;
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yPoint=screenPoint.Y + verticalShift - height / 2;
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Rect bounds = RectExtensions.FromCenterSize(new Point(xPoint, yPoint),new Size(width, height));
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// forcing the X bound is incorrect as this will always force the text into the visible viewport even when it should be out of view
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// if(bounds.X<0)bounds.X=Math.Abs(horizontalShift);
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Point loc = bounds.Location;
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bounds = CoordinateUtilities.RectZoom(bounds, 1.05, 1.15);
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dc.DrawLine(new Pen(Brushes.Black, 1), Point.Add(screenPoint, new Vector(0, verticalShift)), screenPoint);
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dc.DrawRectangle(Brushes.White, new Pen(Brushes.Black, 1), bounds);
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dc.DrawText(textToDraw, loc);
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}
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}
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}
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