Francois.Bitz@SAM.CS.CMU.EDU (08/05/88)
I seem to have some trouble in the following simple statements:
XMapWindow(display,window);
XDrawImagestring(display,window,mygc,20,20,string,strlen(string);
most of the times (when the window is previously unmappped)
these statements get executed the text DOES NOT show up on the
window, whereas a second call to the same lines when the window is already
MAPPED prints text in the window correctly.
I tried doing a XFlush(), but nothing seems to help...
Any suggestions ?
thanks
diamant@hpfclp.SDE.HP.COM (John Diamant) (08/06/88)
> I seem to have some trouble in the following simple statements: > > XMapWindow(display,window); > > XDrawImagestring(display,window,mygc,20,20,string,strlen(string); > > > most of the times (when the window is previously unmappped) > these statements get executed the text DOES NOT show up on the > window, whereas a second call to the same lines when the window is already > MAPPED prints text in the window correctly. You need to do your XDrawImagestring in response to an expose event, not immediately following the XMapWindow. Windows take a finite amount of time to map (especially under a reparenting window manager) and doing what you are doing is time-dependent. Also, your way, the window can't refresh itself if it gets obscured and exposed. You need to put the draw command inside your event loop as specified above (response to expose). John Diamant Software Development Environments Hewlett-Packard Co. ARPA Internet: diamant@hpfclp.sde.hp.com Fort Collins, CO UUCP: {hplabs,hpfcla}!hpfclp!diamant