On Wed, 2018-11-28 at 17:17 +0100, Радомир Хаџић via gtk-app-devel-list wrote: > Hello. > > I've sent as an attachment a code for a very simple PDF viewer. It is > not that well written but that's because I wanted it to be simple and > easy to understand. The purpose of the program is to illustrate a > problem that I'm having with my larger project. > > The problem is that if a user changes page (by clicking "Previous > Page" or "Next Page") and the page when scaled accordingly is bigger > than the visible portion of the page rendering area (GtkDrawingArea), > then only the part of the page will render. You can try this > yourself: > 1. Open a document 2. Make sure that the next page is not completely > visible on the screen (so the scrollbars appear, this can be usually > achieved by clicking "Fit Width") 3. Click "Next page" and try > scrolling. You'll notice that one part of the page is not rendered. > > So, why is this happening and how can I solve it? What also confuses > me is that rendering() function is definitely called when I scroll > but > the page does not render (though it does render as it should when I > scroll the first page of a just opened document) properly, but if I > then resize the window the page renders properly.
I do not see any attachment. My guess is: the page maybe cached somewhere, and it is reloaded (re- rendered) when the view size changes. -- Germán Poo-Caamaño http://calcifer.org/
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