arne@yc.estec.nl (Arne Lundberg) (03/29/89)
I have some questions about the X toolkit and the HP X widgets.
1) I would like to have a function that displays a message box on the
screen containing several pushbuttons. And returns back to the
calling function an indication of which button the user pressed. I
would like to use this for asking questions of the type
-------------------------------
| 'Are yoy sure? (YES) (NO) |
-------------------------------
and get the answer back in a single function call.
I can get the box and the buttons etc on the screen. The problem is
that I have to exit the function in order to come back to XtMainLoop
and at that moment I don't which button the user will press.
Is this possible to do? How?
I have previosly done some programming with HP's XrLib for X10 and
in that library was built for this way of usage.
2) I want to have a bitmap created by bitmap(1) #included in my program
and converted to a XImage suitable for use with the static raster
widget. How is this done?
3) I am using the pulldown menu manager of the HP X widgets. Using this
menu manager I can create 'pullright' submenus for all menupanes
except the first one. Is this a known limitation in the X widgets?
Thanks in advance for all help.
-- Arne Lundberg; ESTEC/YCV, The Netherlands
arne@yc.estec.nl || arne@esatst.UUCP || ALUNDBER@ESTEC.BITNETmac@trantor.harris-atd.com (Mike McDonald) (03/30/89)
In article <1014@esatst.yc.estec.nl> arne@yc.estec.nl (Arne Lundberg) writes: > >2) I want to have a bitmap created by bitmap(1) #included in my program > and converted to a XImage suitable for use with the static raster > widget. How is this done? > >-- Arne Lundberg; ESTEC/YCV, The Netherlands > arne@yc.estec.nl || arne@esatst.UUCP || ALUNDBER@ESTEC.BITNET I just tried to do the same thing today. There is an example of this in the HP widget code. The file of interest is Xw/CreateTile.c. HP's basic stratigy if to create a Pixmap with the raster in it, create an XImage, and then use XPutImage to copy the Pixmap into the XImage. If my understanding of Pixmaps is correct, it's the responsibility of the Xlib's Pixmap routines to correct the byte ordering, bit ordering, etc. for the server. XImages on the other hand are the responsibility of the user. Hope this helps, Mike McDonald mac@trantor.harris-atd.com postmaster@trantor.harris-atd.com (407) 727-5060 Advanced Technology Dept. Harris Corp. M.S. 3A-1912 P.O. Box 37 Melbourne, Florida 32902
duanev@kauai.ACA.MCC.COM (Duane Voth) (03/31/89)
In article <1014@esatst.yc.estec.nl>, arne@yc.estec.nl (Arne Lundberg) writes: > 1) I would like to have a function that displays a message box on the > screen containing several pushbuttons. And returns back to the > calling function an indication of which button the user pressed. > The problem is > that I have to exit the function in order to come back to XtMainLoop > and at that moment I don't which button the user will press. I ran across this problem too. Insisting on returning back to XtMainLoop makes the application code look realy ugly. Calling XtMainLoop from within the function that displays the popup widget implies abuse ala setjmp/longjmp (gag!). XtMainLoop (XtAppMainLoop actually :) however is very straight forward and I can see no problem with duplicating the loop in your own function: while (global_var_that_gets_set_via_a_pushbutton) { XtAppNextEvent(app, &event); XtDispatchEvent(&event); } seems to perform admirably *and* looks pretty too. If the Xaw folks have a better way, I'd like to hear about it. This may also be an R3 only solution - I'm not familiar with R2. -- --- Effectiveness is the measure of Truth: ---- ALL systems are arbitrary! --- duane voth duanev@mcc.com --