[comp.windows.misc] Help for getting texts from several string text widgets of Xaw.

qiu@inf.ethz.ch (Yonggang Qiu) (12/15/89)

 	I want to get users' input from several string text widgets in  Xaw.
So I try to make  XtGetValues call on the XtNstring and the XtNselection. 
I don't know why I can't get correct texts. Making  XtGetValues call on the 
XtNstring can only obtain text from last active one of text widgets. 
Making  XtGetValues call on the XtNselection can't read texts at all.
Moreover, it changes text in  text widgets ( for example, "asd gfddgfdg" 
-->" asd g^@dg@d ") sometimes. The following is the program.

	Can anyone tell me how to obtain texts from several string text 
widgets of Xaw?

	Thanx in advance! Wish you Merry Christamas and Happy New Year!

---- Yonggang
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 Yonggang Qiu                           
 Institute for Information-system  |    e-mail: qiu@inf.ethz.ch
 ETH-Zentrum                       |    phone:  (41-1) 254 7223
 CH-8092 Zurich,Switzerland        |    fax:    (41-1) 262 3973
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


======================================= 
X#include <stdio.h>
X#include <strings.h>
X#include <ctype.h>
X#include <X11/Intrinsic.h>
X#include <X11/Command.h>
X#include <X11/Xlib.h>
X#include <X11/StringDefs.h>
X#include <X11/Shell.h>
X#include <X11/Form.h>
X#include <X11/Text.h>
X#include <X11/Box.h>
X#include <X11/AsciiText.h>

X#define  WIDTH	500
X#define  HEIGHT	50

Widget  toplevel;	/*	top widget     */
Widget  formw;
Widget	topboxwidget;
Widget	boxwidget[3];
Widget	textwidget[3];
Widget  test1widget;
Widget  test2widget;


Arg args[20];
Cardinal  i;

static XrmOptionDescRec options[] = {
	{"-lable","*button.lable",XrmoptionSepArg, NULL}
	};


/**********************************************************************
     inf_text(textstr, parent  )
     -- Create string text widget to display string : textstr,
 	return the widget
**********************************************************************/
Widget  inf_text(textstr, parent)
		/* display information in string text widget  */
char	*textstr;
Widget  parent;

{Widget tw;

 	i = 0;
	XtSetArg( args[i], XtNwidth,WIDTH);  i++;
	XtSetArg( args[i],XtNheight,HEIGHT);  i++;
	XtSetArg( args[i],XtNlength, 2000);    i++;
	XtSetArg( args[i],XtNstring,textstr); i++;
	XtSetArg( args[i],XtNtextSource, NULL);   i++;
	XtSetArg( args[i],XtNtextSink, NULL);    i++;
	XtSetArg( args[i],XtNeditType, XttextEdit);   i++;
        XtSetArg( args[i],XtNtextOptions,  editable | scrollVertical | wordBreak);
          i++;
	tw =
	XtCreateManagedWidget("text",asciiStringWidgetClass,parent,args,i);
	return(tw);
 }    /*  end of inf_text()  */


/**********************************************************************
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
		test1()
	--- GET TEXTS FROM SEVERAL TEXT WIDGET
		make XtGetValues call on XtNstring
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
**********************************************************************/
void  test1(w,client_data, call_data)
Widget w;
caddr_t client_data;
caddr_t call_data;
{  int      j;
   char     *str;

 	for( j=0; j<3; j++)
	 {
   	   XtSetArg( args[0], XtNstring, &str);
	   XtGetValues(textwidget[j], args, 1 );
           printf(" text string = %s\n",str);
	 }
}	/*   end of test1()   */

/**********************************************************************
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
		test2()
	--- GET TEXTS FROM SEVERAL TEXT WIDGET
		make XtGetValues call on XtNselection
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
**********************************************************************/
void  test2(w,client_data, call_data)
Widget w;
caddr_t client_data;
caddr_t call_data;
{  int      j;
   XtTextBlock	text;
   XtTextSelectType   selectall = { XtselectAll,XtselectNull };

	for( j=0; j<3; j++)
	 {
   	   XtSetArg( args[0], XtNselectTypes, selectall );
	   XtSetValues( textwidget[j], args, 1 );

	   XtSetArg( args[0], XtNselection, &text);
	   XtGetValues(textwidget[j], args, 1 );
           printf("text string= %s\n",text.ptr);

	   XtTextUnsetSelection(textwidget[j]);
	 }
}	/*   end of test2()   */



/**********************************************************************
	main(argc,argv)
	-- Creates widgets
	   Events handing
**********************************************************************/
void  main(argc,argv)
	unsigned int  argc;
	char **argv;
{
   int   row;

	toplevel = XtInitialize("main","Demo",options,XtNumber(options),
       	    &argc,argv);
	formw =
	XtCreateManagedWidget("FormW",formWidgetClass,toplevel,args,0);

        test1widget =
          XtCreateManagedWidget("XtNstring",commandWidgetClass,formw,args,0);
	XtAddCallback(testwidget, XtNcallback,test1,NULL);

	XtSetArg( args[0], XtNfromHoriz, test1widget);
        test2widget =
          XtCreateManagedWidget("XtNselection",commandWidgetClass,formw,args,1);
	XtAddCallback(testwidget, XtNcallback,test2,NULL);

	i = 0;
	XtSetArg( args[i], XtNwidth, WIDTH);   i++;
	XtSetArg( args[i], XtNfromVert, test1widget);  i++;
	topboxwidget =
	  XtCreateManagedWidget("Box",boxWidgetClass,formw,args,i);

	for ( row=0; row<3; row++)
	 boxwidget[row] = 
	  XtCreateManagedWidget("Box",boxWidgetClass,topboxwidget,args,0);

	textwidget[0] = inf_text("text 0",boxwidget[0] );
	textwidget[1] = inf_text("text 1",boxwidget[1] );
	textwidget[2] = inf_text("text 2",boxwidget[2] );

	XtRealizeWidget(toplevel);    /* Realize widgets   */

	XtMainLoop();			/* event handing   */
}      /*   end of main()    */


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