kim@analog.UUCP (Kim Helliwell ) (03/19/85)
I am working on a Mac application and have the following question for anyone who has gotten further than I have in understanding Mac arcana. Consider a window with a vertical scroll bar and some text in it. In order to scroll the text when the scroll bar is manipulated, you merely call TEScrollText (or something like that). Now, suppose what you have in the window is NOT merely the text of a single edit record, but several different entities (different TE records, for example). How does one scroll that stuff around? I have considered two approaches. The first is to do a SetOrigin to move the window's grafport where you want it and then repaint the window. The catch is that that moves the scroll bar out of the window, too! So what you have to do is SetOrigin, paint, SetOrigin back to normal, and call DrawControls. That quickly gets messy, esp if you want to use the mouse to point to and select object anywhere in the window. The second approach is to open an auxiliary GrafPort which you position over the actual display area of the window, and use that for displaying and manipulating the window contents and keep the window's GP intact for showing the scroll bar. Just describing this makes it sound like it's not going to work! Even if it did work, think about the mess you would have in moving the window around on the screen! Sooooo, how do you experts out there do this sort of thing? There must be a simpler way than I can see!