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Annotation of 43BSD/contrib/X/XMenu/XMenuAddPane.c, revision 1.1

1.1     ! root        1: #include <X/mit-copyright.h>
        !             2: 
        !             3: /* $Header: XMenuAddPane.c,v 10.7 86/02/01 16:14:20 tony Rel $ */
        !             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(menu, label, active)
        !            20:     register XMenu *menu;      /* Menu object to be modified. */
        !            21:     register char *label;      /* Selection label. */
        !            22:     int active;                        /* Make selection active? */
        !            23: {
        !            24:     register XMPane *pane;     /* Newly created pane. */
        !            25:     register XMSelect *select; /* Initial selection for the new pane. */
        !            26:         
        !            27:     int label_length;          /* Label lenght in characters. */
        !            28:     int label_width;           /* Label width in pixels. */
        !            29: 
        !            30:     /*
        !            31:      * Check for NULL pointers!
        !            32:      */
        !            33:     if (label == NULL) {
        !            34:        _XMErrorCode = XME_ARG_BOUNDS;
        !            35:        return(XM_FAILURE);
        !            36:     }
        !            37: 
        !            38:     /*
        !            39:      * Calloc the XMPane structure and the initial XMSelect.
        !            40:      */
        !            41:     pane = (XMPane *)calloc(1, sizeof(XMPane));
        !            42:     if (pane == NULL) {
        !            43:        _XMErrorCode = XME_CALLOC;
        !            44:        return(XM_FAILURE);
        !            45:     }
        !            46:     select = (XMSelect *)calloc(1, sizeof(XMSelect));
        !            47:     if (select == NULL) {
        !            48:        _XMErrorCode = XME_CALLOC;
        !            49:        return(XM_FAILURE);
        !            50:     }
        !            51: 
        !            52:     /*
        !            53:      * Determine label size.
        !            54:      */
        !            55:     label_width = XQueryWidth(label, menu->p_fnt_info->id);
        !            56:     label_length = strlen(label);
        !            57: 
        !            58:     /*
        !            59:      * Set up the initial selection.
        !            60:      * Values not explicitly set are zeroed by calloc.
        !            61:      */
        !            62:     select->next = select;
        !            63:     select->prev = select;
        !            64:     select->type = SL_HEADER;
        !            65:     select->serial = -1;
        !            66:     select->parent_p = pane;
        !            67: 
        !            68:     /*
        !            69:      * Fill the XMPane structure.
        !            70:      * X and Y position are set to 0 since a recompute will follow.
        !            71:      */
        !            72:     pane->type = PANE;
        !            73:     pane->active = active;
        !            74:     pane->serial = -1;
        !            75:     pane->label = label;
        !            76:     pane->label_width = label_width;
        !            77:     pane->label_length = label_length;
        !            78:     pane->s_list = select;
        !            79: 
        !            80:     /*
        !            81:      * Insert the pane at the end of the pane list.
        !            82:      */
        !            83:     insque(pane, menu->p_list->prev);
        !            84: 
        !            85:     /*
        !            86:      * Update the pane count. 
        !            87:      */
        !            88:     menu->p_count++;
        !            89: 
        !            90:     /*
        !            91:      * Schedule a recompute.
        !            92:      */
        !            93:     menu->recompute = 1;
        !            94: 
        !            95:     /*
        !            96:      * Return the pane number just added.
        !            97:      */
        !            98:     _XMErrorCode = XME_NO_ERROR;
        !            99:     return((menu->p_count - 1));
        !           100: }

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