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Annotation of 43BSDTahoe/new/X/XMenu/XMenuAddPane.c, revision 1.1.1.1

1.1       root        1: #include <X/mit-copyright.h>
                      2: 
                      3: /* $Header: XMenuAddPane.c,v 10.7 86/02/12 16:18:29 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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