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scrollbar handling by X11

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Looking up scrollbars did not work as intended.  The code wanted an
ancestor widget that had both horizontal and vertical scrollbars,
but menus either have none or just vertical.  The lookup code found
some top level widget and returned bad data.
This commit is contained in:
PatR
2021-03-12 18:06:43 -08:00
parent 015380fecf
commit 160344feaa
5 changed files with 23 additions and 14 deletions
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16
win/X11/winX.c
View File

@@ -2682,14 +2682,24 @@ win_X11_init(int dir)
}
void
find_scrollbars(Widget w, Widget *horiz, Widget *vert)
find_scrollbars(
Widget w, /* widget of interest; scroll bars are probably attached
to its parent or grandparent */
Widget last_w, /* if non-zero, don't search ancestory beyond this point */
Widget *horiz, /* output: horizontal scrollbar */
Widget *vert) /* output: vertical scrollbar */
{
*horiz = *vert = (Widget) 0;
/* for 3.6 this looked for an ancestor with both scrollbars but
menus might have only vertical */
if (w) {
do {
*horiz = XtNameToWidget(w, "*horizontal");
*vert = XtNameToWidget(w, "*vertical");
if (*horiz || *vert)
break;
w = XtParent(w);
} while (!*horiz && !*vert && w);
} while (w && (!last_w || w != last_w));
}
}
@@ -2715,7 +2725,7 @@ nh_keyscroll(Widget viewport, XEvent *event, String *params,
direction = atoi(params[0]);
find_scrollbars(viewport, &horiz_sb, &vert_sb);
find_scrollbars(viewport, (Widget) 0, &horiz_sb, &vert_sb);
#define H_DELTA 0.25 /* distance of horiz shift */
/* vert shift is half of curr distance */

11
win/X11/winmenu.c
View File

@@ -290,17 +290,17 @@ menu_key(Widget w, XEvent *event, String *params, Cardinal *num_params)
X11_nhbell();
return;
} else if (ch == MENU_FIRST_PAGE || ch == MENU_LAST_PAGE) {
Widget hbar = (Widget) 0, vbar = (Widget) 0;
Widget hbar, vbar;
float top = (ch == MENU_FIRST_PAGE) ? 0.0 : 1.0;
find_scrollbars(wp->w, &hbar, &vbar);
find_scrollbars(wp->w, wp->popup, &hbar, &vbar);
if (vbar)
XtCallCallbacks(vbar, XtNjumpProc, &top);
return;
} else if (ch == MENU_NEXT_PAGE || ch == MENU_PREVIOUS_PAGE) {
Widget hbar = (Widget) 0, vbar = (Widget) 0;
Widget hbar, vbar;
find_scrollbars(wp->w, &hbar, &vbar);
find_scrollbars(wp->w, wp->popup, &hbar, &vbar);
if (vbar) {
float shown, top;
Arg arg[2];
@@ -309,8 +309,7 @@ menu_key(Widget w, XEvent *event, String *params, Cardinal *num_params)
XtSetArg(arg[1], nhStr(XtNtopOfThumb), &top);
XtGetValues(vbar, arg, TWO);
top += ((ch == MENU_NEXT_PAGE) ? shown : -shown);
if (vbar)
XtCallCallbacks(vbar, XtNjumpProc, &top);
XtCallCallbacks(vbar, XtNjumpProc, &top);
}
return;
} else if (index(menu_info->curr_menu.gacc, ch)) {

6
win/X11/winmisc.c
View File

@@ -1814,16 +1814,14 @@ ec_key(Widget w, XEvent *event, String *params, Cardinal *num_params)
ec_active = FALSE;
return;
} else if (ch == MENU_FIRST_PAGE || ch == MENU_LAST_PAGE) {
hbar = vbar = (Widget) 0;
find_scrollbars(w, &hbar, &vbar);
find_scrollbars(w, (Widget) 0, &hbar, &vbar);
if (vbar) {
top = (ch == MENU_FIRST_PAGE) ? 0.0 : 1.0;
XtCallCallbacks(vbar, XtNjumpProc, &top);
}
return;
} else if (ch == MENU_NEXT_PAGE || ch == MENU_PREVIOUS_PAGE) {
hbar = vbar = (Widget) 0;
find_scrollbars(w, &hbar, &vbar);
find_scrollbars(w, (Widget) 0, &hbar, &vbar);
if (vbar) {
XtSetArg(arg[0], nhStr(XtNshown), &shown);
XtSetArg(arg[1], nhStr(XtNtopOfThumb), &top);