G.1 Window Stream Operations in CLIM
G.1.2 The Viewport and Scrolling
A window stream viewport is the region of the drawing plane that is visible through the window. You can change the viewport by scrolling or by reshaping the window. The viewport does not change if the window is covered by another window (that is, the viewport is the region of the drawing plane that would be visible if the window were on top). A window stream has an end-of-line action and an end-of-page action, which control what happens when the cursor position moves out of the viewport (with-end-of-line-action and with-end-of-page-action, respectively).
CLIM 2.0 User's Guide - OCT 1998 Generated with Harlequin WebMaker