コード例 #1
0
        private static void OnIsEnabledPropertyChanged(DependencyObject source, DependencyPropertyChangedEventArgs args)
        {
            MenuIconImage menuIconImage = source as MenuIconImage;

            if (menuIconImage != null)
            {
                bool isEnabled = Convert.ToBoolean(args.NewValue);
                if (!isEnabled)
                {
                    // Get the source bitmap
                    BitmapImage bitmapImage = new BitmapImage(new Uri(menuIconImage.Source.ToString()));
                    // Convert it to grey
                    menuIconImage.Source = new FormatConvertedBitmap(bitmapImage, PixelFormats.Gray32Float, null, 0);
                    // Create opacity mask for greyscale image as FormatConvertedBitmap does not keep transparency info
                    menuIconImage.OpacityMask = new ImageBrush(bitmapImage);
                }
                else
                {
                    // Set the Source property to the original value
                    menuIconImage.Source = ((FormatConvertedBitmap)menuIconImage.Source).Source;
                    // Reset the opacity mask
                    menuIconImage.OpacityMask = null;
                }
            }
        }
コード例 #2
0
 /// <summary>
 /// Initialises a new instance of the MenuIconExtension class.
 /// </summary>
 /// <param name="sourceUri">The source URI of the image to display. Use the absolute path in the project, e. g. "/Images/myicon.png".</param>
 public MenuIconExtension(string sourceUri)
 {
     img = new MenuIconImage();
     BitmapImage bmp = new BitmapImage();
     bmp.BeginInit();
     bmp.UriSource = new Uri("pack://application:,,," + sourceUri, UriKind.Absolute);
     bmp.EndInit();
     img.Source = bmp;
     img.Width = bmp.PixelWidth;
     img.Height = bmp.PixelHeight;
 }
コード例 #3
0
        /// <summary>
        /// Initialises a new instance of the MenuIconExtension class.
        /// </summary>
        /// <param name="sourceUri">The source URI of the image to display. Use the absolute path in the project, e. g. "/Images/myicon.png".</param>
        public MenuIconExtension(string sourceUri)
        {
            img = new MenuIconImage();
            BitmapImage bmp = new BitmapImage();

            bmp.BeginInit();
            bmp.UriSource = new Uri("pack://application:,,," + sourceUri, UriKind.Absolute);
            bmp.EndInit();
            img.Source = bmp;
            img.Width  = bmp.PixelWidth;
            img.Height = bmp.PixelHeight;
        }