60 lines
2.3 KiB
C#
60 lines
2.3 KiB
C#
using System;
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using System.Globalization;
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using System.Windows;
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using System.Windows.Data;
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namespace RadialMenu.Converters
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{
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internal class RadialMenuItemToContentPosition : IMultiValueConverter
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{
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public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
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{
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if (values.Length != 6)
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{
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throw new ArgumentException("RadialMenuItemToContentPosition converter needs 6 values (double angle, double centerX, double centerY, double contentWidth, double contentHeight, double contentRadius) !", "values");
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}
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if (parameter == null)
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{
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throw new ArgumentNullException("parameter", "RadialMenuItemToContentPosition converter needs the parameter (string axis) !");
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}
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string axis = (string)parameter;
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if (axis != "X" && axis != "Y")
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{
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throw new ArgumentException("RadialMenuItemToContentPosition parameter needs to be 'X' or 'Y' !", "parameter");
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}
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double angle = (double)values[0];
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double centerX = (double)values[1];
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double centerY = (double)values[2];
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double contentWidth = (double)values[3];
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double contentHeight = (double)values[4];
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double contentRadius = (double)values[5];
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Point contentPosition = ComputeCartesianCoordinate(new Point(centerX, centerY), angle, contentRadius);
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if (axis == "X")
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{
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return contentPosition.X - (contentWidth / 2);
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}
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return contentPosition.Y - (contentHeight / 2);
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}
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public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)
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{
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throw new InvalidOperationException("RadialMenuItemToContentPosition is a One-Way converter only !");
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}
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private static Point ComputeCartesianCoordinate(Point center, double angle, double radius)
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{
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// Converts to radians
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double radiansAngle = (Math.PI / 180.0) * (angle - 90);
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double x = radius * Math.Cos(radiansAngle);
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double y = radius * Math.Sin(radiansAngle);
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return new Point(x + center.X, y + center.Y);
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}
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}
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}
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