comp.windows.x Frequently Asked Questions (FAQ) 7/7

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149) I'm writing a widget and can't use a float as a resource value.
150) Is this a memory leak in the X11R4 XtDestroyWidget()?!
151) Is this a memory leak in the X11R4 deletion of work procs?!
152) Why does the process size of my X programs go up,up,up?
153) Are callbacks guaranteed to be called in the order registered?
154) Why doesn't XtDestroyWidget() actually destroy the widget?
155) How can I open multiple displays with Xt?
156) How do I query the user synchronously using Xt?
157) How do I determine the name of an existing widget?
158) Why do I get a BadDrawable error drawing to XtWindow(widget)?
159) Where can I get documentation on Xaw, the Athena widget set?
160) What's the difference between actions and callbacks?
161) How do I simulate a button press/release event for a widget?
162) Can I make Xt or Xlib calls from a signal handler?
163)! What are these "Xlib: unexpected async reply" errors?
164) What are these "Xlib sequence lost" errors?
165) How can my Xt program handle socket, pipe, or file input?
166) Why doesn't my Xt timer go off when it is supposed to (sic) ?
167) What's this R6 error: X Toolkit Error: NULL ArgVal in XtGetValues?
168) Why do I get a BadMatch error when calling XGetImage?
169) How can my application tell if it is being run under X?
170) How do I make a "busy cursor" while my application is computing?
171) How do I fork without hanging my parent X program?
172) Why doesn't anything appear when I run this simple program?
173) What is the difference between a Screen and a screen?
174) Can XGetWindowAttributes get a window's background pixel/pixmap?
175) How do I create a transparent window?
176) Why doesn't GXxor produce mathematically-correct color values?
177) Why does every color I allocate show up as black?
178) Why do I get a protocol error when creating a cursor (sic)?
179) Why can't my program get a standard colormap?
180) Why doesn't the shared-memory extension appear to work?
181) Why does the pixmap I copy to the screen show up as garbage?
182) How do I get the width/height of an existing pixmap?
183) How can I most quickly send an image to the X server?
184) How do I check whether a window ID is valid?
185) Can I have two applications draw to the same window?
186) Why can't my program work with tvtwm or swm?
187) Can I rely on a server which offers backing store?
188) How do I catch the "close window" event to avoid "fatal IO error"?
189) How do I keep a window from being resized by the user?
190) How do I keep a window in the foreground at all times?
191) How do I make text and bitmaps blink in X?
192) How do I get a double-click in Xlib?
193) How do I render rotated text?
194) Why doesn't my multi-threaded X program work (sic) ?
195) How can I ensure that only one instance of my application is running?
196) How can I have two applications communicate via the X server?
197) Where can I get information on internationalizing applications?
198) What is the X Registry? (How do I reserve names?)

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Last Update March 27 2014 @ 02:12 PM

comp.windows.x Frequently Asked Questions (FAQ) 7/7

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comp.windows.x Frequently Asked Questions (FAQ) 7/7

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