public static void UpdateBindingTargets(this DependencyObject dependencyObject)
{
foreach (DependencyObject element in dependencyObject.EnumerateVisualDescendents())
{
LocalValueEnumerator localValueEnumerator = element.GetLocalValueEnumerator();
while (localValueEnumerator.MoveNext())
{
BindingExpressionBase bindingExpression = BindingOperations.GetBindingExpressionBase(element, localValueEnumerator.Current.Property);
bindingExpression?.UpdateTarget();
}
var itemsControl = element as ItemsControl;
itemsControl?.Items.Refresh();
}
}
private Inline ImageInlineEvaluator(Match match)
{
if (match == null)
{
throw new ArgumentNullException("match");
}
string linkText = match.Groups[2].Value;
string url = match.Groups[3].Value;
BitmapImage imgSource = null;
try
{
if (!Uri.IsWellFormedUriString(url, UriKind.Absolute) && !System.IO.Path.IsPathRooted(url))
{
url = System.IO.Path.Combine(AssetPathRoot ?? string.Empty, url);
}
imgSource = new BitmapImage(new Uri(url, UriKind.RelativeOrAbsolute));
}
catch (Exception)
{
return(new Run("!" + url)
{
Foreground = Brushes.Red
});
}
Image image = new Image {
Source = imgSource, Tag = linkText
};
if (ImageStyle == null)
{
image.Margin = new Thickness(0);
}
else
{
image.Style = ImageStyle;
}
// Bind size so document is updated when image is downloaded
if (imgSource.IsDownloading)
{
Binding binding = new Binding(nameof(BitmapImage.Width));
binding.Source = imgSource;
binding.Mode = BindingMode.OneWay;
BindingExpressionBase bindingExpression = BindingOperations.SetBinding(image, Image.WidthProperty, binding);
EventHandler downloadCompletedHandler = null;
downloadCompletedHandler = (sender, e) =>
{
imgSource.DownloadCompleted -= downloadCompletedHandler;
bindingExpression.UpdateTarget();
};
imgSource.DownloadCompleted += downloadCompletedHandler;
}
else
{
image.Width = imgSource.Width;
}
return(new InlineUIContainer(image));
}
/// <summary>
/// DragEnd event handler from DragDrop behavior.
/// </summary>
private void SourceDoDragDrop(ITextSelection selection, IDataObject dataObject)
{
// Run OLE drag-drop process. It will eat all user input until the drop
DragDropEffects allowedDragDropEffects = DragDropEffects.Copy;
if (!_textEditor.IsReadOnly)
{
allowedDragDropEffects |= DragDropEffects.Move;
}
DragDropEffects resultingDragDropEffects = DragDropEffects.None;
try
{
resultingDragDropEffects = DragDrop.DoDragDrop( //
_textEditor.UiScope, // dragSource,
dataObject, //
allowedDragDropEffects);
}
// Ole32's DoDragDrop can return E_UNEXCEPTED, which comes to us as a COMException,
// if something unexpected happened during the drag and drop operation,
// e.g. the application receiving the drop failed. In this case we should
// not fail, we should catch the exception and act as if the drop wasn't allowed.
catch (COMException ex) when(ex.HResult == NativeMethods.E_UNEXPECTED)
{
}
// Remove source selection
if (!_textEditor.IsReadOnly && //
resultingDragDropEffects == DragDropEffects.Move && //
_dragSourceTextRange != null &&
!_dragSourceTextRange.IsEmpty)
{
// Normally we delete the source selection from OnDrop event,
// unless source and target TextBoxes are different.
// In this case the source selection is still not empty,
// which means that target was in a different TextBox.
// So we still need to delete the selected content in the source one.
// This will create an undo unit different from a dropping one,
// which is ok, because it will be in different TextBox's undo stack.
using (selection.DeclareChangeBlock())
{
// This is end of Move - we need to delete source content
_dragSourceTextRange.Text = String.Empty;
}
}
// Clean up the text range.
_dragSourceTextRange = null;
// Check the data binding expression and update the source and target if the drag source
// has the binding expression. Without this, data binding is broken after complete the
// drag-drop operation because Drop() paste the object then set the focus to the target.
// The losting focus invoke the data binding expression's Update(), but the source isn't
// updated yet before complete DoDragDrop.
if (!_textEditor.IsReadOnly)
{
BindingExpressionBase bindingExpression = BindingOperations.GetBindingExpressionBase(
_textEditor.UiScope, TextBox.TextProperty);
if (bindingExpression != null)
{
bindingExpression.UpdateSource();
bindingExpression.UpdateTarget();
}
}
}
private Inline ImageInlineEvaluator(Match match)
{
if (match is null)
{
throw new ArgumentNullException(nameof(match));
}
string linkText = match.Groups[2].Value;
string url = match.Groups[3].Value;
BitmapImage imgSource = null;
try
{
if (!Uri.IsWellFormedUriString(url, UriKind.Absolute) && !System.IO.Path.IsPathRooted(url))
{
url = System.IO.Path.Combine(AssetPathRoot ?? string.Empty, url);
}
imgSource = new BitmapImage();
imgSource.BeginInit();
imgSource.CacheOption = BitmapCacheOption.None;
imgSource.UriCachePolicy = new RequestCachePolicy(RequestCacheLevel.BypassCache);
imgSource.CacheOption = BitmapCacheOption.OnLoad;
imgSource.CreateOptions = BitmapCreateOptions.IgnoreImageCache;
imgSource.UriSource = new Uri(url);
imgSource.EndInit();
}
catch (Exception)
{
return(new Run("!" + url)
{
Foreground = Brushes.Red
});
}
Image image = new Image {
Source = imgSource, Tag = linkText
};
if (ImageStyle is null)
{
image.Margin = new Thickness(0);
}
else
{
image.Style = ImageStyle;
}
// Bind size so document is updated when image is downloaded
if (imgSource.IsDownloading)
{
Binding binding = new Binding(nameof(BitmapImage.Width));
binding.Source = imgSource;
binding.Mode = BindingMode.OneWay;
BindingExpressionBase bindingExpression = BindingOperations.SetBinding(image, Image.WidthProperty, binding);
void downloadCompletedHandler(object sender, EventArgs e)
{
imgSource.DownloadCompleted -= downloadCompletedHandler;
bindingExpression.UpdateTarget();
}
imgSource.DownloadCompleted += downloadCompletedHandler;
}
else
{
image.Width = imgSource.Width;
}
return(new InlineUIContainer(image));
}
protected override void OnClick()
{
base.OnClick();
isCheckedBinding.UpdateTarget();
}
private Inline ImageInlineEvaluator(Match match)
{
if (match == null)
{
throw new ArgumentNullException("match");
}
string linkText = match.Groups[2].Value;
string url = match.Groups[3].Value;
BitmapImage imgSource = null;
Image image = null;
try {
string assembly_name = System.Reflection.Assembly.GetExecutingAssembly().GetName().Name;
//url = url.Replace('/', '\\');
string resource_url = $"pack://application:,,,/" + url; // https://stackoverflow.com/questions/12954327/dynamically-adding-and-loading-image-from-resources-in-c-sharp
Uri resource_uri = new Uri(resource_url);
// Загрузить изображение надо в любом случае т.к. надо узнать его ширину ниже.
BitmapImage bi = new BitmapImage();
bi.BeginInit();
bi.UriSource = resource_uri;
bi.EndInit();
imgSource = bi;
//Binding b = new Binding("ActualWidth");
// Анимированные gif-ки надо подгружать немного иначе через компонент XamlAnimatedGif:
if (System.IO.Path.GetExtension(url).ToLower().Equals(".gif") == true)
{
image = new Image()
{
Stretch = Stretch.UniformToFill /*, MaxWidth=500*/
};
XamlAnimatedGif.AnimationBehavior.SetSourceUri(image, imgSource.UriSource); // https://wpfanimatedgif.codeplex.com/documentation
}
else
{
image = new Image {
Source = imgSource, Tag = linkText, Stretch = Stretch.UniformToFill /*, MaxWidth = 500*/
};
}
//if (!Uri.IsWellFormedUriString(url, UriKind.Absolute) && !System.IO.Path.IsPathRooted(url)) {
// url = System.IO.Path.Combine(AssetPathRoot ?? string.Empty, url);
//}
//imgSource = new BitmapImage(new Uri(url, UriKind.RelativeOrAbsolute));
}
catch (Exception) {
return(new Run("!" + url)
{
Foreground = Brushes.Red
});
}
if (ImageStyle == null)
{
image.Margin = new Thickness(0);
}
else
{
image.Style = ImageStyle;
}
// Bind size so document is updated when image is downloaded
if (imgSource.IsDownloading)
{
Binding binding = new Binding(nameof(BitmapImage.Width));
binding.Source = imgSource;
binding.Mode = BindingMode.OneWay;
BindingExpressionBase bindingExpression = BindingOperations.SetBinding(image, Image.WidthProperty, binding);
EventHandler downloadCompletedHandler = null;
downloadCompletedHandler = (sender, e) =>
{
imgSource.DownloadCompleted -= downloadCompletedHandler;
bindingExpression.UpdateTarget();
};
imgSource.DownloadCompleted += downloadCompletedHandler;
}
else
{
//image.Width = imgSource.Width;
//image.SnapsToDevicePixels = true;
image.Width = imgSource.PixelWidth;
}
InlineUIContainer iuc = new InlineUIContainer(image);
return(iuc);
}
