protected byte[] RenderText(string text)
{
if (!Application.Current.Dispatcher.HasShutdownStarted)
{
return(Application.Current.Dispatcher.Invoke(() =>
{
TextBlock textBlock = new TextBlock();
textBlock.BeginInit();
textBlock.Text = text;
textBlock.Width = double.IsNaN(Width) ? Width : Width - 10;
textBlock.TextAlignment = TextAlignment;
textBlock.TextWrapping = AutoSize ? TextWrapping.NoWrap : TextWrapping.Wrap;
textBlock.TextTrimming = TextTrimming.CharacterEllipsis;
textBlock.FontFamily = Font.Family;
textBlock.FontSize = Font.Size;
textBlock.FontWeight = Font.Weight;
textBlock.FontStyle = Font.Style;
textBlock.FontStretch = Font.Stretch;
textBlock.EndInit();
textBlock.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity));
textBlock.Arrange(new Rect(textBlock.DesiredSize));
textBlock.UpdateLayout();
RenderTargetBitmap bmp = new RenderTargetBitmap(Convert.ToInt32(Math.Ceiling(textBlock.ActualWidth)), Convert.ToInt32(Math.Ceiling(textBlock.ActualHeight)), 96, 96, PixelFormats.Pbgra32);
bmp.Render(textBlock);
var encoder = new PngBitmapEncoder();
encoder.Frames.Add(BitmapFrame.Create(bmp));
using (var stream = new MemoryStream())
{
encoder.Save(stream);
return stream.ToArray();
}
}));
}
return(new byte[0]);
}
protected void UpdateTagDisplay()
{
if (m_flagsBlock != null)
{
Children.Remove(m_flagsBlock);
m_flagsBlock = null;
}
if (!m_showMetadata)
{
return; // No metadata to be shown
}
string flagsText = m_title ?? string.Empty;
if (m_tags != null && m_tags.Count > 0)
{
flagsText = string.Concat(flagsText, "\r\n", string.Join("\r\n", m_tags));
}
if (!string.IsNullOrEmpty(flagsText))
{
m_flagsBlock = new TextBlock();
m_flagsBlock.BeginInit();
m_flagsBlock.Text = flagsText;
m_flagsBlock.FontSize = cTagsFontSize;
m_flagsBlock.Foreground = cTagsColor;
m_flagsBlock.FontWeight = FontWeights.Bold;
m_flagsBlock.HorizontalAlignment = HorizontalAlignment.Right;
m_flagsBlock.VerticalAlignment = VerticalAlignment.Top;
m_flagsBlock.EndInit();
Children.Add(m_flagsBlock);
}
}
protected void UpdateMetadata()
{
// Remove any existing metadata block
if (m_metadataBlock != null)
{
Children.Remove(m_metadataBlock);
m_metadataBlock = null;
}
if (!m_showMetadata)
{
return; // No metadata to be shown
}
StringBuilder builder = new StringBuilder();
if (m_uri != null)
{
string path = m_uri.OriginalString;
SlideShow slideShow = Parent as SlideShow;
if (slideShow != null)
{
string rootPath = slideShow.RootPath;
if (path.StartsWith(rootPath, StringComparison.OrdinalIgnoreCase))
{
path = path.Substring(rootPath.Length);
}
}
string[] pathParts = path.Split(sPathSeparators, StringSplitOptions.RemoveEmptyEntries);
foreach (string part in pathParts)
{
builder.Append("\r\n");
builder.Append(part);
}
}
if (m_dateTaken != null)
{
builder.Append("\r\n");
builder.Append(m_dateTaken);
}
if (builder.Length > 0)
{
m_metadataBlock = new TextBlock();
m_metadataBlock.BeginInit();
m_metadataBlock.Text = builder.ToString();
m_metadataBlock.FontSize = cMetadataFontSize;
m_metadataBlock.Foreground = cMetadataColor;
m_metadataBlock.HorizontalAlignment = HorizontalAlignment.Right;
m_metadataBlock.VerticalAlignment = VerticalAlignment.Bottom;
m_metadataBlock.TextAlignment = TextAlignment.Right;
m_metadataBlock.EndInit();
Children.Add(m_metadataBlock);
}
UpdateTagDisplay();
}
public void RenderText()
{
RenderTargetBitmap rtBitmap = new RenderTargetBitmap(_width, _height, 96.0, 96.0, PixelFormats.Pbgra32);
Grid grid = new Grid();
grid.BeginInit();
grid.Background = new ImageBrush(_bmp);
grid.Arrange(new Rect(new System.Windows.Size(_width, _height)));
foreach (Label l in TextList)
{
TextBlock txtBlock = new TextBlock();
txtBlock.BeginInit();
txtBlock.FontSize = 12;
txtBlock.HorizontalAlignment = HorizontalAlignment.Center;
txtBlock.Text = l.Text;
txtBlock.Arrange(new Rect(l.X1, l.Y1, l.X2 - l.X1, l.Y2 - l.Y1));
txtBlock.EndInit();
grid.Children.Add(txtBlock);
}
grid.EndInit();
rtBitmap.Render(grid);
_bmp.Lock();
rtBitmap.CopyPixels(new Int32Rect(0, 0, rtBitmap.PixelWidth, rtBitmap.PixelHeight), _bmp.BackBuffer, _bmp.BackBufferStride * _bmp.PixelHeight, _bmp.BackBufferStride);
_bmp.AddDirtyRect(new Int32Rect(0, 0, _width, _height));
_bmp.Unlock();
TextList.Clear();
}
private void OnLoadComplete()
{
try
{
if (m_bitmap != null)
{
Image image = new Image();
image.BeginInit();
image.Source = m_bitmap;
image.Stretch = Stretch.Uniform;
image.EndInit();
Children.Add(image);
}
else
{
string message = (m_loadError != null)
? string.Concat("Failed to load image:\r\n", m_loadError.Message)
: "Failed to load image.";
TextBlock label = new TextBlock();
label.BeginInit();
//label.Content = message;
//label.HorizontalContentAlignment = HorizontalAlignment.Center;
//label.VerticalContentAlignment = VerticalAlignment.Center;
label.Text = message;
label.FontSize = 20;
label.Foreground = Brushes.White;
label.TextWrapping = TextWrapping.Wrap;
label.EndInit();
Children.Add(label);
}
UpdateMetadata();
// Don't change the state if already displayed.
if (PanelState == PanelState.Init)
{
SetPanelState(PanelState.Ready);
}
}
catch (Exception err)
{
Debug.WriteLine(err.ToString());
}
}
public void Message(string msg)
{
if (fMessage != null)
{
Children.Remove(fMessage);
fMessage = null;
}
if (!string.IsNullOrEmpty(msg))
{
TextBlock txtblk = new TextBlock();
txtblk.BeginInit();
txtblk.Text = msg;
txtblk.FontSize = 28;
txtblk.Foreground = Brushes.Crimson;
txtblk.HorizontalAlignment = HorizontalAlignment.Left;
txtblk.VerticalAlignment = VerticalAlignment.Bottom;
txtblk.EndInit();
Children.Add(txtblk);
fMessage = txtblk;
fClearMessageAt = Environment.TickCount + cMessageDisplayPeriod;
}
}
