void AsyncBmpGenerator_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
// invoke shouldn't be necessary... actually
//TESharedComponents.MyBackgroundWorker.BeginInvoke(() =>
//{
AsyncBmpData data = e.Result as AsyncBmpData;
// if filename has changed while the bmp was generated-> don't display
if (data.File == View.PdfPath)
{
// if returned bitmap null or error -> set unavailable
if (e.Error == null && data.bmp != null)
{
Bmp = data.bmp;
IsImageVisible = true;
IsUnavailable = false;
}
else
{
Bmp = null;
IsImageVisible = false;
IsUnavailable = true;
}
}
// restart compilation if job pending
NextBmpJob = NextBmpJob;
// });
}
/// <summary>
/// Updates the control state. Should be called whenever the PdfPath property changes
/// </summary>
public void Refresh()
{
if (View.PdfPath == "")
{
IsUnavailable = true;
IsImageVisible = false;
NextBmpJob = null; // if manually set to unavailable-> clear pending bmp jobs
myPdfBmpDoc.UnloadPdf();
}
else
{
RedrawBMP(true);
}
}
void AsyncBmpGenerator_DoWork(object sender, DoWorkEventArgs e)
{
AsyncBmpData data = e.Argument as AsyncBmpData;
if (data.File != null) //&& data.Reload)
{
myPdfBmpDoc.LoadPdf(data.File);
}
// this is not optimal since the pdf might be changing when called.... pass PdfWrapper instead to remedy....
//data.bmp = myPdfBmpDoc.GetBitmapSource(data.Resolution, data.RenderTransparent);
data.bmp = myPdfBmpDoc.GetBitmap(data.Resolution, data.RenderTransparent);
e.Result = data;
}
/// <summary>
/// This method draws the currently loaded Pdf into a bitmap, and displays this bitmap in the image control.
/// It is called, e.g., when the size of the TikzDisplay control changes
/// Warning: It reloads the Pdf only if ReloadFile is set.
/// </summary>
/// <param name="ReloadFile">Reload the pdf file from disk.</param>
public void RedrawBMP(bool ReloadFile)
{
if (myPdfBmpDoc != null)
{
AsyncBmpData data = new AsyncBmpData();
data.Resolution = View.Resolution;
data.RenderTransparent = View.RenderTransparent;
data.File = View.PdfPath;
data.Reload = ReloadFile;
NextBmpJob = data; // this automatically starts the background worker if no other job is in progress
return;
}
}
