Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!uunet!seismo!mcvax!uvabick!thomas From: thomas@uvabick.UUCP (Thomas Fruin) Newsgroups: comp.sys.mac Subject: Window Manager problem (perhaps even a bug) Message-ID: <225@uvabick.UUCP> Date: Thu, 9-Jul-87 19:04:03 EDT Article-I.D.: uvabick.225 Posted: Thu Jul 9 19:04:03 1987 Date-Received: Sun, 12-Jul-87 09:31:43 EDT Organization: uvabick Lines: 57 Keywords: Window Manager SendBehind problem Thought I'd try my luck on Usenet too, after not hearing from Info-Mac for about two weeks... I'm confused by a Window Manager problem I've run into. Maybe I've even found an error in Inside Macintosh. Let me explain what I'm trying to do: The program I'm working on will have a "palette" window similar to those windows in FullPaint: a window that always stays on top, but doesn't act as the active window. My program will have several document windows below this palette that should behave as normal as possible to the user. This means that when a user clicks in a window that isn't the active one, that window should be brought to the front, BUT stay below the palette window. Obviously I cannot use SelectWindow for this. Instead I use SendBehind, which seems exactly the function for this purpose (forget about highlighting for now). Here is where the problem occurs. Inside Macintosh tells me that if I use SendBehind to move a window closer to the front, I should make some extra low-level Window Manager calls after calling SendBehind. Specifically a call to PaintOne and one to CalcVis. But I don't think these are sufficient. Whenever I try this out by clicking in one of my windows to bring it to the "front", the visRgn of the window that used to be in front is screwed up. Anything I draw in it doesn't stay in its visible region, but flows into the window I just brought to the front. See the figure. It shows two windows before and after the SendBehind, PaintOne and CalcVis calls, when I start drawing into one of them. -------------------- -------------------- |behind | |in front | | ------------------- | |--- | |I am drawing text| | I am drawing text| ----|into lower right | -----into-lower-right | |window only. | |window only. | ------------------- ------------------- By changing the CalcVis call to a CalcVisBehind things go back to normal. So it seems to me SendBehind is not updating the visRgn of the window(s) it is covering up. Of course it should. The Apple traplist in the Sybex book Using the Mac Toolbox with C says that SendBehind already calls CalcVisBehind... Can anyone help me with this one? If I'm doing things all wrong, I'd also welcome suggestions to other and better ways to implement such a palette window. -- Thomas Fruin fruin@hlerul5.BITNET thomas@uvabick.UUCP Leiden University, Netherlands