Scrolling a textpane with pgup key.

Question

Well, i want to add so that the user can scroll up 1 page in a jtextpane lying in a jscrollpane by pressing the page up key.
Been looking around how to do this, but havent found anything so far...
Can anyone give some suggestions?

Answer 1

Not sure I understand this question. This is the default behaviour of the text pane when it has focus.
Well, I have never tried this but the JViewport has a couple of methods for scrolling:
1) scrollRectToVisible(...)
2) setViewPosition(...)
There is also a method getViewSize(). The getViewSize returns a Rectangle which contains the x,y and width height values.
So, you could just add/subtract the height of the current position to get a new view position and then uses of the above methods to do the scrolling.
Or, JTextPane implements the Scrollable interface which contains a method, getScrollableBlockIncrement(...) which could be used to calculate a new position.
Or, JScrollBar has a getBlockIncrement(...) method. It also has getValue(), setValue(...) methods. So maybe something like:
JScrollBar bar = scrollpane.getVerticalScrollBar();
bar.setValue( bar.getValue() + bar.getBlockIncrement(...) );