[Okular-devel] [Bug 155566] Scrolling becomes slow when text is selected

[Robert Knight]

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http://bugs.kde.org/show_bug.cgi?id=155566         




------- Additional Comments From robertknight gmail com  2008-01-12 21:55 -------
With Qt's paint debugging feature enabled (export QT_FLUSH_PAINT=1) you can see that when selecting text, Okular repaints the entire viewport whenever the selection is changed.

When scrolling without a text selection, only the newly exposed content in the viewport is drawn.

When scrolling with a text selection, the entire viewport is repainted every time the content is moved.