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From: sundar@WHEATIES.AI.MIT.EDU (Sundar Narasimhan)
Newsgroups: comp.windows.x
Subject: Expose, EnterNotify events
Message-ID: <8901190105.AA10095@special-k.ai.mit.edu>
Date: 19 Jan 89 01:05:50 GMT
Sender: daemon@bloom-beacon.MIT.EDU
Organization: The Internet
Lines: 28

Hi: I have a ttyWidget that expects to draw the cursor when it
receives an EnterNotify event (sort of like emacs). It also expects to
redraw the entire text in it when it receives an Expose event.

This works fine normally, but when the user uses a chorded
window-manager key (like say Meta-LEFT) to circulate the window up
from a behind a whole stack of windows, the widget seems to get the
Expose all right, but not the EnterNotify event. Needless to say, this
causes the text to be displayed correctly, but not the cursor. This is
somewhat annoying. Can someone explain to me what the right behaviour
(at the widget level) should be? (Should Expose be really treated as
Expose&EnterNotify)?

Secondly, in R3, what is the right way to deal with the mouse cursor
when you are managing text in a widget by yourself? The reason I ask
this is that in my ttyWidget since I have to manage the block cursor
myself, I have to paint the characters in inversevideo myself (I am
using XDrawImageString for this). However, when I do this I notice that
sometimes the mouse cursor causes silly turd like droppings on the
screen if it happens to be near where my text cursor is. Is one
supposed to hide the mouse cursor before calling XDrawImageString? How
does one prevent the mouse cursor from interacting with
XDrawImageString, or is there something else I am doing wrong?

-Sundar

Why, oh why do we have to worry about cursors ?! (Every program is now
going to have to maintain state for this, what fun!)