[Okular-devel] CONTINUOUS PDF page problem

[向kmlyygy]

I am writing a simple PDF reader using poppler-qt4. 
  
 1. Here is what I have done:
 QScrollArea ---- show the a PDF file
 QWidget     ---- widget of the scrollArea
 QLabel        ---- labels in the widget, one label shows a PDF page. 
  
 2. Here is the problem:
 I load all the pages. It's continuous but it will be a long time to show the pages if the PDF file is very huge.
  
 3. My question:
 How okular deal with this problem? What should I do to make the PDF reader continuous and fast.
  
 4. Thanks a lot
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