Submitted by Anonymous on Mon, 02/04/2002 - 19:03. Developers
I sent a report to motif-bugs@opengroup.org in december 13
(with a copy to comp.windows.x.motif) showing that an XmText
doesn`t updates the scrollbars if its parent is not a
XmScrolledWindow. It seems that the bug report was ignored,
since OpenMotif 2.2 doesn`t includes it. So I`m posting it here
again hoping that some kind soul will comit the patch.

Thanks

Submitter Name Carlos A. M. dos Santos
Organization Universidade Regional Integrada - RS/Brazil
Email Address casantos@urisan.tche.br
Phone +55 55 3313-7969
OSF License Number not applicable
Licensee`s Defect Number not applicable

Hardware/Software Configuration
-------------------------------

Offering and Version Motif 2.1.30
Component (Module) lib/Xm/Text.c
Client Hardware Dell OptiPlex GX1
Client Software FreeBSD 4.4, X11R6.5
Server Hardware SAME
Server Software SAME
Compiler GCC 2.95.3

Problem Description
-------------------

Severity Level Severe

Date of First Occurrence December 12, 2001

One Line Description

XmText doesn`t updates scrollbars if parent is not XmScrolledWindow

Full Description

Whet the parent of a XmText widget is of XmScrolledWindow widget
class, scrollbar hummb positions are properly updated when the user
uses the keyboard to navigate up and down. However, if the parent is a
subclass of XmScrolledWindow, like XmMainWindow, this doesen`t
happens. To workarround the problem the programmer must use
XmCreateScrolledText to create the work window of the main window.

Repeat By

Compile and run the following program. Fill the text buffer to make
scrolling necessary and navigate with the keyboard.

/*
* cc -o XmTextBug XmTextBug.c -I/usr/X11R6/include
* -L/usr/X11R6/lib -lXm -lXt -lX11
*/
#include
#include
#include
#include

int main(int argc, char *argv[])
{
XtAppContext app;
Widget top, main_w, menu, button, text;

top = XtAppInitialize(&app, "TextBug", NULL, 0,
&argc, argv, NULL, NULL, 0);
main_w = XtCreateManagedWidget("main_w", xmMainWindowWidgetClass,
top, NULL, 0);
menu = XmCreateMenuBar(main_w, "menu", NULL, 0);
button = XtCreateManagedWidget("Quit", xmPushButtonWidgetClass,
menu, NULL, 0);
XtManageChild(menu);
text = XtVaCreateManagedWidget("text", xmTextWidgetClass, main_w,
XmNeditMode, XmMULTI_LINE_EDIT, XmNcolumns, 80,
XmNrows, 25, NULL);
XtVaSetValues(main_w, XmNmenuBar, menu, XmNworkWindow, text, NULL);
XtRealizeWidget(top);
XtAppMainLoop(app);
return 0;
}

Proposed Solution

Apply the following patch.

--- motif/lib/Xm/Text.c.patch4 Thu Dec 13 015342 2001
+++ motif/lib/Xm/Text.c Thu Dec 13 015949 2001
@@ -2910,19 +2910,19 @@
if (XmDirectionMatch(XmPrim_layout_direction(widget),
XmTOP_TO_BOTTOM_RIGHT_TO_LEFT)) {
if (widget->text.output->data->scrollvertical &&
- XtClass(widget->core.parent) == xmScrolledWindowWidgetClass)
+ XmIsScrolledWindow(XtParent(widget)))
_XmRedisplayVBar(widget);
if (widget->text.output->data->scrollhorizontal &&
- XtClass(widget->core.parent) == xmScrolledWindowWidgetClass &&
+ XmIsScrolledWindow(XtParent(widget)) &&
!widget->text.hsbar_scrolling)
_XmChangeHSB(widget);
} else {
if (widget->text.output->data->scrollvertical &&
- XtClass(widget->core.parent) == xmScrolledWindowWidgetClass &&
+ XmIsScrolledWindow(XtParent(widget)) &&
!widget->text.vsbar_scrolling)
_XmChangeVSB(widget);
if (widget->text.output->data->scrollhorizontal &&
- XtClass(widget->core.parent) == xmScrolledWindowWidgetClass)
+ XmIsScrolledWindow(XtParent(widget)))
_XmRedisplayHBar(widget);
}
}