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59 changes: 59 additions & 0 deletions
59
MahApps.Metro/Converters/BackgroundToForegroundConverter.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,59 @@ | ||
| using System; | ||
| using System.Globalization; | ||
| using System.Windows; | ||
| using System.Windows.Data; | ||
| using System.Windows.Media; | ||
|
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| namespace MahApps.Metro.Converters | ||
| { | ||
| public class BackgroundToForegroundConverter : IValueConverter | ||
| { | ||
| private static BackgroundToForegroundConverter _instance; | ||
|
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| // Explicit static constructor to tell C# compiler | ||
| // not to mark type as beforefieldinit | ||
| static BackgroundToForegroundConverter() | ||
| { | ||
| } | ||
|
|
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| private BackgroundToForegroundConverter() | ||
| { | ||
| } | ||
|
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| public static BackgroundToForegroundConverter Instance | ||
| { | ||
| get { return _instance ?? (_instance = new BackgroundToForegroundConverter()); } | ||
| } | ||
|
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| /// <summary> | ||
| /// Determining Ideal Text Color Based on Specified Background Color | ||
| /// http://www.codeproject.com/KB/GDI-plus/IdealTextColor.aspx | ||
| /// </summary> | ||
| /// <param name = "bg">The bg.</param> | ||
| /// <returns></returns> | ||
| private Color IdealTextColor(Color bg) | ||
| { | ||
| const int nThreshold = 105; | ||
| var bgDelta = System.Convert.ToInt32((bg.R * 0.299) + (bg.G * 0.587) + (bg.B * 0.114)); | ||
| var foreColor = (255 - bgDelta < nThreshold) ? Colors.Black : Colors.White; | ||
| return foreColor; | ||
| } | ||
|
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| public object Convert(object value, Type targetType, object parameter, CultureInfo culture) | ||
| { | ||
| if (value is SolidColorBrush) | ||
| { | ||
| var idealForegroundColor = this.IdealTextColor(((SolidColorBrush)value).Color); | ||
| var foreGroundBrush = new SolidColorBrush(idealForegroundColor); | ||
| foreGroundBrush.Freeze(); | ||
| return foreGroundBrush; | ||
| } | ||
| return Brushes.White; | ||
| } | ||
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| public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) | ||
| { | ||
| return DependencyProperty.UnsetValue; | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,43 @@ | ||
| using System; | ||
| using System.Globalization; | ||
| using System.Windows; | ||
| using System.Windows.Data; | ||
|
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| namespace MahApps.Metro.Converters | ||
| { | ||
| // this converter is only used by DatePicker to convert the font size to width and height of the icon button | ||
| public class FontSizeOffsetConverter : IValueConverter | ||
| { | ||
| private static FontSizeOffsetConverter _instance; | ||
|
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| // Explicit static constructor to tell C# compiler | ||
| // not to mark type as beforefieldinit | ||
| static FontSizeOffsetConverter() | ||
| { | ||
| } | ||
|
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| private FontSizeOffsetConverter() | ||
| { | ||
| } | ||
|
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| public static FontSizeOffsetConverter Instance | ||
| { | ||
| get { return _instance ?? (_instance = new FontSizeOffsetConverter()); } | ||
| } | ||
|
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| public object Convert(object value, Type targetType, object parameter, CultureInfo culture) | ||
| { | ||
| if (value is double && parameter is double) { | ||
| var offset = (double)parameter; | ||
| var orgValue = (double)value; | ||
| return Math.Round(orgValue + offset); | ||
| } | ||
| return value; | ||
| } | ||
|
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| public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) | ||
| { | ||
| return DependencyProperty.UnsetValue; | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,51 @@ | ||
| using System; | ||
| using System.Globalization; | ||
| using System.Windows; | ||
| using System.Windows.Controls; | ||
| using System.Windows.Data; | ||
| using System.Windows.Media; | ||
|
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| namespace MahApps.Metro.Converters | ||
| { | ||
| public class TreeViewMarginConverter : IValueConverter | ||
| { | ||
| public double Length { get; set; } | ||
|
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| public object Convert(object value, Type targetType, object parameter, CultureInfo culture) | ||
| { | ||
| var item = value as TreeViewItem; | ||
| if (item == null) | ||
| return new Thickness(0); | ||
|
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| return new Thickness(Length * item.GetDepth(), 0, 0, 0); | ||
| } | ||
|
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| public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) | ||
| { | ||
| throw new NotImplementedException(); | ||
| } | ||
| } | ||
|
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| public static class TreeViewItemExtensions | ||
| { | ||
| public static int GetDepth(this TreeViewItem item) | ||
| { | ||
| TreeViewItem parent; | ||
| while ((parent = GetParent(item)) != null) | ||
| { | ||
| return GetDepth(parent) + 1; | ||
| } | ||
| return 0; | ||
| } | ||
|
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| private static TreeViewItem GetParent(TreeViewItem item) | ||
| { | ||
| var parent = VisualTreeHelper.GetParent(item); | ||
| while (!(parent is TreeViewItem || parent is TreeView)) | ||
| { | ||
| parent = VisualTreeHelper.GetParent(parent); | ||
| } | ||
| return parent as TreeViewItem; | ||
| } | ||
| } | ||
| } |
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