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    Length: 2170 (0x87a)
    Types: TextFile
    Names: »XMenuLocate.c«

└─⟦a0efdde77⟧ Bits:30001252 EUUGD11 Tape, 1987 Spring Conference Helsinki
    └─⟦526ad3590⟧ »EUUGD11/gnu-31mar87/X.V10.R4.tar.Z« 
        └─⟦2109abc41⟧ 
            └─⟦this⟧ »./X.V10R4/XMenu/XMenuLocate.c« 

TextFile

#include <X/mit-copyright.h>

/* $Header: XMenuLocate.c,v 10.5 86/07/11 16:49:17 tony Rel $ */
/* Copyright    Massachusetts Institute of Technology    1985	*/

/*
 * XMenu:	MIT Project Athena, X Window system menu package
 *
 *	XMenuLocate - Return data necessary to position and locate
 *		      a menu on the screen.
 *
 *	Author:		Tony Della Fera, DEC
 *			January 11, 1985
 *
 */

#include "XMenuInternal.h"

int
XMenuLocate(menu, p_num, s_num, x_pos, y_pos, ul_x, ul_y, width, height)
    register XMenu *menu;	/* Menu object being located. */
    int p_num;			/* Active pane number. */
    int s_num;			/* Active selection number. */
    int x_pos;			/* X coordinate of mouse active position. */
    int y_pos;			/* Y coordinate of mouse active position. */
    int *ul_x;			/* Returned upper left menu X coordinate. */
    int *ul_y;			/* Returned upper left menu Y coordinate. */
    int *width;			/* Returned menu width. */
    int *height;		/* Returned menu height. */
{
    register int i;		/* Loop counter. */
    register XMPane *p_ptr;	/* XMPane pointer. */
    register XMSelect *s_ptr;	/* XMSelect pointer. */
    
    /*
     * Are the position arguments positive?
     */
    if ((x_pos <= 0) || (y_pos <= 0)) {
	_XMErrorCode = XME_ARG_BOUNDS;
	return(XM_FAILURE);
    }

    /*
     * Find the right pane.
     */
    p_ptr = _XMGetPanePtr(menu, p_num);
    if (p_ptr == NULL) return(XM_FAILURE);

    /*
     * Find the right selection.
     */
    s_ptr = _XMGetSelectionPtr(p_ptr, s_num);

    /*
     * Check to see that the menu's dependencies have been
     * recomputed and are up to date.  If not, do it now.
     */
    if (menu->recompute) XMenuRecompute(menu);

    /*
     * Compute the new menu origin such that the active point lies
     * in the center of the desired active pane and selection.
     * This sets the values of ul_x and ul_y.
     */
    _XMTransToOrigin(menu, p_ptr, s_ptr, x_pos, y_pos, ul_x, ul_y);

    /*
     * Set remaining return argument values.
     */
    *width = menu->width;
    *height = menu->height;

    /*
     * Return successfully.
     */
    _XMErrorCode = XME_NO_ERROR;
    return(XM_SUCCESS);
}