steveh@tasman.cc.utas.edu.au (Steven Howell) (06/06/91)
G'day everyone, I'm experiencing a few simple problems with quickdraw. It's probably a basic problem, but I'm pretty new to programming with the toolbox, so here goes: (I'm using Think Pascal 2.0) My application starts up and lets the user open a window containing a graphic (for the sake of argument constructed with simple moveto's and lineto's). I set the current port to my window with SetPort(@mywindowrecord.port). The shape draws just fine. Now the problem: If the user pulls down the apple menu and selects "about", a modal dialog box appears, partially obscuring the graphic. When the dialog box is "put away", it leaves a hole in my window. My event loop successfully detects the updateEvent and faithfully attempts to redraw the window contents - however, none of my quickdraw calls show up. (Even if I halt my program, select "Instant" and type in a few moveto's and lineto's, nothing appears. What am I doing wrong? Thanks in advance, steve h. ps. I have tried re-calling Setport. I have also tried calling SelectWindow (a bit pointless, since it's already selected) and penpat(black), all to no avail. Help!
gourdol@imag.imag.fr (Gourdol Arnaud) (06/07/91)
In article <steveh.676185942@tasman> steveh@tasman.cc.utas.edu.au (Steven Howell) writes:
[I can't update my window]
On receiving the update event you must call SetPort,
then call BeginUpdate, then update your window, then call
EndUpdate.
Arno.
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/ Arno Gourdol. // On the Netland: Gourdol@imag.fr /
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