<title> Popup Windows </title>

<ul>
 <li> <a href="#popup"> Popup Windows </a>
 <li> <a href="popups.html#fGYN"> GetYesNo </a>
 <li> <a href="popups.html#fGO">  GetOkay </a>
 <li> <a href="popups.html#fGTRS">GetTriState </a>
 <li> <a href="popups.html#fGS">  GetString </a>
 <li> <a href="popups.html#fGLS">  GetLongString </a>
 <li> <a href="popups.html#fGTXT">  GetText </a>
 <li> <a href="popups.html#fGF">  GetFile </a>
 <li> <a href="popups.html#fSFF"> SetFreqFilter </a>
</ul>
<hr>
<p>
<h2> <a name="popup"> Popup Windows </a> </h2>
<p>
Popup windows are simple dialog boxes that get a simple yes/no or
string answer from the user.  When these windows popup, they block
input to the previously active window.
<hr>
<p>
<a name="fGYN"> <b>
int GetYesNo(char *question);
</b> </a>
<p>
This function allows you to prompt the user for the answer to a simple
yes or no type of question.  It simply pops up a dialog box with the
text contained in the string question, and two okay/cancel buttons.
<p>
If the user clicks Okay, this function returns TRUE.  If the user
clicks Cancel, this function returns FALSE.  The text in the question
string can have embedded newlines (\n characters) to break things up
or to add spacing.
<p>
SEE ALSO : 
<a href="popups.html#fGO">       GetOkay() </a>, 
<a href="popups.html#fTRS">       GetTriState() </a>, 
<a href="popups.html#fGS">        GetString() </a>,
<a href="popups.html#fGTXT">      GetText() </a>
<hr>
<p>
<a name="fGO"><b>
int GetOkay(char *question);
</b></a>
<p>
This function is mainly for short informational displays.  It pops up
a dialog box with the text contained in the string question, and an
okay button.
<p>
The text in the question string can have embedded newlines (\n
characters) to break things up or to add spacing.
<p>
SEE ALSO : 
<a href="popups.html#fGYN">       GetYesNo() </a>, 
<a href="popups.html#fTRS">       GetTriState() </a>, 
<a href="popups.html#fGS">        GetString() </a>,
<a href="popups.html#fGTXT">      GetText() </a>
<hr>
<p>
<a name="fGTRS"><b>
int GetTriState(char *question);
</b></a>
<p>
This function allows you to prompt the user for the answer to a simple
yes or no type of question, and in addition, the user has a Cancel
option.  The dialog box contains the string pointed to by the argument
question and it also contains three buttons, Yes, No and Cancel. 
<p>
If the user clicks the Yes button, this function returns TRUE.  If the
user clicks the No button, this function returns FALSE.  If the user
clicks the Cancel button, a -1 is returned.  It is important to keep
in mind that you can't just test for true/false as you can with
<a href="popups.html#fGYN">       GetYesNo() </a> since a return of Cancel would test as true (since it is a
non-zero value).
<p>
The text in the question string can have embedded newlines (\n
characters) to break things up or to add spacing.
<p>
SEE ALSO : 
<a href="popups.html#fGYN">       GetYesNo() </a>, 
<a href="popups.html#fGO">        GetOkay() </a>, 
<a href="popups.html#fGS">        GetString() </a>,
<a href="popups.html#fGTXT">      GetText() </a>
<hr>
<p>
<a name="fGS"><b>
char *GetString(char *msg, char *default);
</b> </a>
<p>
This function allows you to prompt the user for a string of input.
The first argument, msg, is a pointer to a string which will be
displayed in the dialog box.  The next argument, default, is the
default string to place in the text string box (it can be NULL or ""). 
<p>
When you call this function, it pops up a small dialog box on the
screen, and the user can enter the line of text.  When the user clicks
ok or cancel, the function returns a pointer to the string of text the
user entered.
<p>
The string that is returned to your application is dynamically
allocated with malloc().  It is the application's responsibility to
free it when it is done.
<p>
If the user clicks cancel, you get a NULL return value.
<p>
SEE ALSO : 
<a href="popups.html#fGYN">       GetYesNo() </a>,
<a href="popups.html#fGTXT">      GetText() </a>
<hr>
<p>
<a name="fGLS"><b>
char *GetLongString(char *msg, char *default, int width);
</b> </a>
<p>
Similar to GetString(), with an additional argument controlling the
width of the input box (in pixels).
<p>
SEE ALSO : 
<a href="popups.html#fGS">        GetString() </a>,
<a href="popups.html#fGTXT">      GetText() </a>
<hr>
<p>
<a name="fGTXT"><b>
char *GetText(char *msg, char *default, int width, int height);
</b> </a>
<p>
Similar to GetString(), but the dialog box is replaced by
an editable window of dimensions width x height, which scrolls
in both vertical and horizontal directions.
<p>
SEE ALSO :
<a href="popups.html#fGS">       GetString() </a>,
<a href="popups.html#fGLS">      GetLongString() </a>
<hr>
<p>
<a name="fGFILE"><b>
char *GetFile(char info_label, char file_or_dir_name, FreqCB func, void *data)
</b> </a>
<p>
This is the API call to the File Requestor, which allows you to
browse files from a directory or filesystem. The initial directory is 
set to be the directory file_or_dir_name -- or the directory containing
that file if it is not a directory. The top information label is set
to be info_label, usually some information to be passed to users.
If the callback function (FreqCB) func is not NULL, a double click
on an item in the scroll list allows 'func' to be executed without
quitting the File Requestor. The syntax for the callback function is
<pre>
      void func(Widget w, char *dir_name, char *file_name, void *data)
</pre>
where dir_name and file_name are set to the values selected with the 
File Requestor.
<p>
SEE ALSO: 
<a href="popups.html#SFF">      SetFreqFilter()     </a>
<hr>
<p>
<a name="fSFF"><b>
void SetFreqFilter(char *filter)
</b> </a>
<p>
Sets the "filter" to be used in the GetFile() procedure. The default
filter is "*", which lets all files be listed in the file requestor. 
If filter is set to "*.txt", then only files possessing a .txt suffix
will be listed. An arbitrary number of wild card characters '*' can be
used.  The length of filter cannot exceed 80 characters in total.
<p>
SEE ALSO: 
<a href="popups.html#GFILE">      GetFile()     </a>