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Annotation of researchv9/X11/src/X.V11R1/lib/oldXMenu/AddPane.c, revision 1.1

1.1     ! root        1: #include <X11/copyright.h>
        !             2: 
        !             3: /* $Header: AddPane.c,v 1.2 87/08/04 10:25:30 toddb Exp $ */
        !             4: /* Copyright    Massachusetts Institute of Technology    1985  */
        !             5: 
        !             6: /*
        !             7:  * XMenu:      MIT Project Athena, X Window system menu package
        !             8:  *
        !             9:  *     XMenuAddPane - Adds a pane to an XMenu object.
        !            10:  *
        !            11:  *     Author:         Tony Della Fera, DEC
        !            12:  *                     August, 1985
        !            13:  *
        !            14:  */
        !            15: 
        !            16: #include "XMenuInternal.h"
        !            17: 
        !            18: int
        !            19: XMenuAddPane(display, menu, label, active)
        !            20:     Display *display;           
        !            21:     register XMenu *menu;      /* Menu object to be modified. */
        !            22:     register char *label;      /* Selection label. */
        !            23:     int active;                        /* Make selection active? */
        !            24: {
        !            25:     register XMPane *pane;     /* Newly created pane. */
        !            26:     register XMSelect *select; /* Initial selection for the new pane. */
        !            27:         
        !            28:     int label_length;          /* Label length in characters. */
        !            29:     int label_width;           /* Label width in pixels. */
        !            30: 
        !            31:     /*
        !            32:      * Check for NULL pointers!
        !            33:      */
        !            34:     if (label == NULL) {
        !            35:        _XMErrorCode = XME_ARG_BOUNDS;
        !            36:        return(XM_FAILURE);
        !            37:     }
        !            38: 
        !            39:     /*
        !            40:      * Calloc the XMPane structure and the initial XMSelect.
        !            41:      */
        !            42:     pane = (XMPane *)calloc(1, sizeof(XMPane));
        !            43:     if (pane == NULL) {
        !            44:        _XMErrorCode = XME_CALLOC;
        !            45:        return(XM_FAILURE);
        !            46:     }
        !            47:     select = (XMSelect *)calloc(1, sizeof(XMSelect));
        !            48:     if (select == NULL) {
        !            49:        _XMErrorCode = XME_CALLOC;
        !            50:        return(XM_FAILURE);
        !            51:     }
        !            52:     
        !            53:     /*
        !            54:      * Determine label size.
        !            55:      */
        !            56:     label_length = strlen(label);
        !            57:     label_width = XTextWidth(menu->p_fnt_info,
        !            58:                             label,
        !            59:                             label_length);
        !            60:     
        !            61:     /*
        !            62:      * Set up the initial selection.
        !            63:      * Values not explicitly set are zeroed by calloc.
        !            64:      */
        !            65:     select->next = select;
        !            66:     select->prev = select;
        !            67:     select->type = SL_HEADER;
        !            68:     select->serial = -1;
        !            69:     select->parent_p = pane;
        !            70: 
        !            71:     /*
        !            72:      * Fill the XMPane structure.
        !            73:      * X and Y position are set to 0 since a recompute will follow.
        !            74:      */
        !            75:     pane->type = PANE;
        !            76:     pane->active = active;
        !            77:     pane->serial = -1;
        !            78:     pane->label = label;
        !            79:     pane->label_width = label_width;
        !            80:     pane->label_length = label_length;
        !            81:     pane->s_list = select;
        !            82: 
        !            83:     /*
        !            84:      * Insert the pane at the end of the pane list.
        !            85:      */
        !            86:     insque(pane, menu->p_list->prev);
        !            87: 
        !            88:     /*
        !            89:      * Update the pane count. 
        !            90:      */
        !            91:     menu->p_count++;
        !            92: 
        !            93:     /*
        !            94:      * Schedule a recompute.
        !            95:      */
        !            96:     menu->recompute = 1;
        !            97: 
        !            98:     /*
        !            99:      * Return the pane number just added.
        !           100:      */
        !           101:     _XMErrorCode = XME_NO_ERROR;
        !           102:     return((menu->p_count - 1));
        !           103: }

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