C++ (Cpp) AssignMax Examples

Example #1

File: ScrollByL.c Project: aosm/X11apps

static Boolean
ScrollVerticalText(
Widget w,
int new_line,
Boolean force_redisp)
{
  ScrollByLineWidget sblw = (ScrollByLineWidget) w;
  int num_lines = sblw->scroll.num_visible_lines;
  int max_lines, old_line;
  Boolean move_thumb = FALSE;

/*
 * Do not let the window extend out of bounds.
 */

  if ( new_line < 0) {
    new_line = 0;
    move_thumb = TRUE;
  }
  else {
    max_lines = sblw->scroll.lines - (int)w->core.height / sblw->scroll.font_height;
    AssignMax(max_lines, 0);

    if ( new_line > max_lines ) {
      new_line = max_lines;
      move_thumb = TRUE;
    }
  }

/* 
 * If forced to redisplay then do a full redisplay and return.
 */

  old_line = sblw->scroll.line_pointer;	
  sblw->scroll.line_pointer = new_line;	/* Set current top of page. */

  if (force_redisp) 
    MoveAndClearText(w, 0, /* cause a full redisplay */ 0, 0);

  if (new_line == old_line)
    return(move_thumb);

/*
 * Scroll forward.
 */

  else if (new_line < old_line) {
    int lines_to_scroll = old_line - new_line;
    MoveAndClearText(w, 0, num_lines - lines_to_scroll, lines_to_scroll);
  }

/* 
 * Scroll back.
 */

  else {
    int lines_to_scroll = new_line - old_line;
    MoveAndClearText(w, lines_to_scroll, num_lines - lines_to_scroll, 0);
  }

  return(move_thumb);
}

Example #2

File: Viewport.c Project: freedesktop-unofficial-mirror/xorg__lib__libXaw

/*
 * Function:
 *	ComputeWithForceBars
 *
 * Parameters:
 *	widget	    - viewport widget
 *	query	    - whether or not to query the child
 *	intended    - cache of the childs height is stored here
 *		      (used and returned)
 *	clip_width  - size of clip window (used and returned)
 *	clip_height - ""
 *
 * Description:
 *	Computes the layout give forcebars is set.
 */
static void
ComputeWithForceBars(Widget widget, Bool query, XtWidgetGeometry *intended,
		     int *clip_width, int *clip_height)
{
    ViewportWidget w = (ViewportWidget)widget;
    Widget child = w->viewport.child;
    XtWidgetGeometry preferred;

    /*
     * If forcebars then needs = allows = has
     * Thus if needsvert is set it MUST have a scrollbar
     */
    if (w->viewport.allowvert) {
	if (w->viewport.vert_bar == NULL)
	    w->viewport.vert_bar = CreateScrollbar(w, False);

	*clip_width -= XtWidth(w->viewport.vert_bar) +
		       XtBorderWidth(w->viewport.vert_bar);
    }

    if (w->viewport.allowhoriz) {
	if (w->viewport.horiz_bar == NULL)
	    w->viewport.horiz_bar = CreateScrollbar(w, True);

	*clip_height -= XtHeight(w->viewport.horiz_bar) +
			XtBorderWidth(w->viewport.horiz_bar);
    }

    AssignMax(*clip_width, 1);
    AssignMax(*clip_height, 1);

    if (!w->viewport.allowvert) {
	intended->height = *clip_height;
	intended->request_mode = CWHeight;
    }
    if (!w->viewport.allowhoriz) {
	intended->width = *clip_width;
	intended->request_mode = CWWidth;
    }

    if (query) {
	if (w->viewport.allowvert || w->viewport.allowhoriz) {
	    XtQueryGeometry(child, intended, &preferred);

	    if (!(intended->request_mode & CWWidth)) {
		if (preferred.request_mode & CWWidth)
		    intended->width = preferred.width;
		else
		    intended->width = XtWidth(child);
	    }

	    if (!(intended->request_mode & CWHeight)) {
		if (preferred.request_mode & CWHeight)
		    intended->height = preferred.height;
		else
		    intended->height = XtHeight(child);
	    }
	}
    }
    else {
	if (w->viewport.allowvert)
	    intended->height = XtHeight(child);
	if (w->viewport.allowhoriz)
	    intended->width = XtWidth(child);
    }

    if (*clip_width > (int)intended->width)
	intended->width = *clip_width;
    if (*clip_height > (int)intended->height)
	intended->height = *clip_height;
}