C# SolidColorBrush.Clone方法代码示例

        private static void ApplyThemeInternal(this FrameworkElement control, Theme? theme, SolidColorBrush accentBrush, SolidColorBrush contrastBrush)
        {
            ValidationHelper.NotNull(control, () => control);

            // Resource dictionaries paths
            var lightBrushesUri = new Uri("/Elysium;component/Themes/LightBrushes.xaml", UriKind.Relative);
            var darkBrushesUri = new Uri("/Elysium;component/Themes/DarkBrushes.xaml", UriKind.Relative);

            // Resource dictionaries
            var lightBrushesDictionary = new ResourceDictionary { Source = lightBrushesUri };
            var darkBrushesDictionary = new ResourceDictionary { Source = darkBrushesUri };

            if (theme == Theme.Light)
            {
                // Add LightBrushes.xaml, if not included
                if (control.Resources.MergedDictionaries.All(dictionary => dictionary.Source != lightBrushesUri))
                {
                    control.Resources.MergedDictionaries.Add(lightBrushesDictionary);
                }

                // Remove DarkBrushes.xaml, if included
                var darkColorsDictionaries = control.Resources.MergedDictionaries.Where(dictionary => dictionary.Source == darkBrushesUri).ToList();
                foreach (var dictionary in darkColorsDictionaries)
                {
                    control.Resources.MergedDictionaries.Remove(dictionary);
                }
            }
            if (theme == Theme.Dark)
            {
                // Add DarkBrushes.xaml, if not included
                if (control.Resources.MergedDictionaries.All(dictionary => dictionary.Source != darkBrushesUri))
                {
                    control.Resources.MergedDictionaries.Add(darkBrushesDictionary);
                }

                // Remove LightBrushes.xaml, if included
                var lightColorsDictionaries = control.Resources.MergedDictionaries.Where(dictionary => dictionary.Source == lightBrushesUri).ToList();
                foreach (var dictionary in lightColorsDictionaries)
                {
                    control.Resources.MergedDictionaries.Remove(dictionary);
                }
            }

            // Bug in WPF 4: http://connect.microsoft.com/VisualStudio/feedback/details/555322/global-wpf-styles-are-not-shown-when-using-2-levels-of-references
            if (control.Resources.Keys.Count == 0)
            {
                control.Resources.Add(typeof(Window), new Style(typeof(Window)));
            }

            if (accentBrush != null)
            {
                var accentBrushFrozen = !accentBrush.IsFrozen && accentBrush.CanFreeze ? accentBrush.GetAsFrozen() : accentBrush;
                if (control.Resources.Contains("AccentBrush"))
                {
                    // Set AccentBrush value, if key exist
                    control.Resources["AccentBrush"] = accentBrushFrozen;
                }
                else
                {
                    // Add AccentBrush key and value, if key doesn't exist
                    control.Resources.Add("AccentBrush", accentBrushFrozen);
                }
            }

            if (contrastBrush != null)
            {
                var contrastBrushFrozen = !contrastBrush.IsFrozen && contrastBrush.CanFreeze ? contrastBrush.GetAsFrozen() : contrastBrush;
                if (control.Resources.Contains("ContrastBrush"))
                {
                    // Set ContrastBrush value, if key exist
                    control.Resources["ContrastBrush"] = contrastBrushFrozen;
                }
                else
                {
                    // Add ContrastBrush key and value, if key doesn't exist
                    control.Resources.Add("ContrastBrush", contrastBrushFrozen);
                }

                var semitransparentContrastBrush = contrastBrush.Clone();
                semitransparentContrastBrush.Opacity = 1d / 8d;
                var semitransparentContrastBrushFrozen = !semitransparentContrastBrush.IsFrozen && semitransparentContrastBrush.CanFreeze
                                                             ? semitransparentContrastBrush.GetAsFrozen()
                                                             : semitransparentContrastBrush;
                if (control.Resources.Contains("SemitransparentContrastBrush"))
                {
                    // Set SemitransparentContrastBrush value, if key exist
                    control.Resources["SemitransparentContrastBrush"] = semitransparentContrastBrushFrozen;
                }
                else
                {
                    // Add SemitransparentContrastBrush key and value, if key doesn't exist
                    control.Resources.Add("SemitransparentContrastBrush", semitransparentContrastBrushFrozen);
                }
            }

            // Add Generic.xaml, if not included
            var genericDictionaryUri = new Uri("/Elysium;component/Themes/Generic.xaml", UriKind.Relative);
            if (control.Resources.MergedDictionaries.All(dictionary => dictionary.Source != genericDictionaryUri))
            {
                control.Resources.MergedDictionaries.Add(new ResourceDictionary { Source = genericDictionaryUri });
//.........这里部分代码省略.........

        /// <summary>
        /// Constructor! Hurrah!
        /// </summary>
        /// <param name="feeditem"></param>
        public FeedWin(FeedConfigItem feeditem)
        {
            Log.Debug("Constructing feedwin. GUID:{0} URL: {1}", feeditem.Guid, feeditem.Url);
            InitializeComponent();

            fci = feeditem;
            Width = fci.Width;
            Left = fci.Position.X;
            Top = fci.Position.Y;
            //Kick of thread to figure out what sort of plugin to load for this sort of feed.
            ThreadPool.QueueUserWorkItem(state => GetFeedType(fci));

            //Set up the animations for the mouseovers
            fadein = new ColorAnimation { AutoReverse = false, From = fci.DefaultColor, To = fci.HoverColor, Duration = new Duration(TimeSpan.FromMilliseconds(200)), RepeatBehavior = new RepeatBehavior(1) };
            fadeout = new ColorAnimation { AutoReverse = false, To = fci.DefaultColor, From = fci.HoverColor, Duration = new Duration(TimeSpan.FromMilliseconds(200)), RepeatBehavior = new RepeatBehavior(1) };

            textbrush = new SolidColorBrush(feeditem.DefaultColor);

            //Add the right number of textblocks to the form, depending on what the user asked for.
            for (var ii = 0; ii < fci.DisplayedItems; ii++)
            {
                maingrid.RowDefinitions.Add(new RowDefinition());
                var textblock = new TextBlock
                                    {
                                        Style = (Style)FindResource("linkTextStyle"),
                                        Name = string.Format("TextBlock{0}", ii + 1),
                                        TextTrimming = TextTrimming.CharacterEllipsis,
                                        Foreground = textbrush.Clone(),
                                        Background = new SolidColorBrush(Color.FromArgb(1, 0, 0, 0)),
                                        FontFamily = fci.FontFamily,
                                        FontSize = fci.FontSize,
                                        FontStyle = fci.FontStyle,
                                        FontWeight = fci.FontWeight,
                                        Visibility = Visibility.Collapsed
                                    };

                textblock.SetValue(Grid.ColumnSpanProperty, 2);
                RegisterName(textblock.Name, textblock);
                maingrid.Children.Add(textblock);
                Grid.SetRow(textblock, ii + 1);
            }

            maingrid.RowDefinitions.Add(new RowDefinition());
            movehandle = new Image();
            movehandle.Width = movehandle.Height = 16;
            movehandle.Name = "movehandle";

            movehandle.HorizontalAlignment = HorizontalAlignment.Left;

            movehandle.Cursor = Cursors.SizeAll;
            movehandle.Source = new BitmapImage(new Uri("/Feedling;component/Resources/move-icon.png", UriKind.Relative));
            movehandle.SetValue(Grid.ColumnSpanProperty, 2);
            RegisterName(movehandle.Name, movehandle);
            maingrid.Children.Add(movehandle);
            movehandle.MouseDown += movehandle_MouseDown;
            movehandle.Visibility = Visibility.Collapsed;
            Grid.SetRow(movehandle, maingrid.RowDefinitions.Count);
        }

        /// <summary>
        /// Reset the <seealso cref="SolidColorBrush"/> to be used for highlighting the current editor line.
        /// </summary>
        /// <param name="newValue"></param>
        private void AdjustCurrentLineBackground(SolidColorBrush newValue)
        {
            if (newValue != null)
              {
            HighlightCurrentLineBackgroundRenderer oldRenderer = null;

            // Make sure there is only one of this type of background renderer
            // Otherwise, we might keep adding and WPF keeps drawing them on top of each other
            foreach (var item in this.TextArea.TextView.BackgroundRenderers)
            {
              if (item != null)
              {
            if (item is HighlightCurrentLineBackgroundRenderer)
            {
              oldRenderer = item as HighlightCurrentLineBackgroundRenderer;
            }
              }
            }

            this.TextArea.TextView.BackgroundRenderers.Remove(oldRenderer);

            this.TextArea.TextView.BackgroundRenderers.Add(new HighlightCurrentLineBackgroundRenderer(this, newValue.Clone()));

            // Remove reference to old background renderer instance (if any) and construct BracketRenderer from scratch
            if (this.mBracketRenderer != null)
            {
              this.TextArea.TextView.BackgroundRenderers.Remove(this.mBracketRenderer);
              this.mBracketRenderer = null;
            }

            this.mBracketRenderer = new BracketHighlightRenderer(this.TextArea.TextView);
            this.TextArea.TextView.BackgroundRenderers.Add(this.mBracketRenderer);
              }
        }