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Annotation of 43BSDTahoe/new/X/XMenu/XMenuLocate.c, revision 1.1

1.1     ! root        1: #include <X/mit-copyright.h>
        !             2: 
        !             3: /* $Header: XMenuLocate.c,v 10.5 86/07/11 16:49:17 tony Rel $ */
        !             4: /* Copyright    Massachusetts Institute of Technology    1985  */
        !             5: 
        !             6: /*
        !             7:  * XMenu:      MIT Project Athena, X Window system menu package
        !             8:  *
        !             9:  *     XMenuLocate - Return data necessary to position and locate
        !            10:  *                   a menu on the screen.
        !            11:  *
        !            12:  *     Author:         Tony Della Fera, DEC
        !            13:  *                     January 11, 1985
        !            14:  *
        !            15:  */
        !            16: 
        !            17: #include "XMenuInternal.h"
        !            18: 
        !            19: int
        !            20: XMenuLocate(menu, p_num, s_num, x_pos, y_pos, ul_x, ul_y, width, height)
        !            21:     register XMenu *menu;      /* Menu object being located. */
        !            22:     int p_num;                 /* Active pane number. */
        !            23:     int s_num;                 /* Active selection number. */
        !            24:     int x_pos;                 /* X coordinate of mouse active position. */
        !            25:     int y_pos;                 /* Y coordinate of mouse active position. */
        !            26:     int *ul_x;                 /* Returned upper left menu X coordinate. */
        !            27:     int *ul_y;                 /* Returned upper left menu Y coordinate. */
        !            28:     int *width;                        /* Returned menu width. */
        !            29:     int *height;               /* Returned menu height. */
        !            30: {
        !            31:     register int i;            /* Loop counter. */
        !            32:     register XMPane *p_ptr;    /* XMPane pointer. */
        !            33:     register XMSelect *s_ptr;  /* XMSelect pointer. */
        !            34:     
        !            35:     /*
        !            36:      * Are the position arguments positive?
        !            37:      */
        !            38:     if ((x_pos <= 0) || (y_pos <= 0)) {
        !            39:        _XMErrorCode = XME_ARG_BOUNDS;
        !            40:        return(XM_FAILURE);
        !            41:     }
        !            42: 
        !            43:     /*
        !            44:      * Find the right pane.
        !            45:      */
        !            46:     p_ptr = _XMGetPanePtr(menu, p_num);
        !            47:     if (p_ptr == NULL) return(XM_FAILURE);
        !            48: 
        !            49:     /*
        !            50:      * Find the right selection.
        !            51:      */
        !            52:     s_ptr = _XMGetSelectionPtr(p_ptr, s_num);
        !            53: 
        !            54:     /*
        !            55:      * Check to see that the menu's dependencies have been
        !            56:      * recomputed and are up to date.  If not, do it now.
        !            57:      */
        !            58:     if (menu->recompute) XMenuRecompute(menu);
        !            59: 
        !            60:     /*
        !            61:      * Compute the new menu origin such that the active point lies
        !            62:      * in the center of the desired active pane and selection.
        !            63:      * This sets the values of ul_x and ul_y.
        !            64:      */
        !            65:     _XMTransToOrigin(menu, p_ptr, s_ptr, x_pos, y_pos, ul_x, ul_y);
        !            66: 
        !            67:     /*
        !            68:      * Set remaining return argument values.
        !            69:      */
        !            70:     *width = menu->width;
        !            71:     *height = menu->height;
        !            72: 
        !            73:     /*
        !            74:      * Return successfully.
        !            75:      */
        !            76:     _XMErrorCode = XME_NO_ERROR;
        !            77:     return(XM_SUCCESS);
        !            78: }

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