1notcurses_tabbed(3)                                        notcurses_tabbed(3)
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NAME

6       notcurses_tabbed – tabbed interface widget
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SYNOPSIS

9       #include <notcurses/notcurses.h>
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11              #define NCTABBED_OPTION_BOTTOM 0x0001
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13              struct nctabbed;
14              struct ncplane;
15              struct nctab;
16
17              typedef struct nctabbed_options {
18                uint64_t selchan; // channel for the selected tab header
19                uint64_t hdrchan; // channel for unselected tab headers
20                uint64_t sepchan; // channel for the tab separator
21                const char* separator; // separator string (copied by nctabbed_create())
22                uint64_t flags;   // bitmask of NCTABBED_OPTION_*
23              } nctabbed_options;
24
25              typedef void (*tabcb)(struct nctab* t, struct ncplane* ncp, void* userptr);
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27       struct    nctabbed*    nctabbed_create(struct   ncplane*   ncp,   const
28       nctabbed_options* opts);
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30       void nctabbed_destroy(struct nctabbed* nt);
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32       void nctabbed_redraw(struct nctabbed* nt);
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34       void nctabbed_ensure_selected_header_visible(struct nctabbed* nt);
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36       struct nctab* nctabbed_selected(struct nctabbed* nt);
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38       struct nctab* nctabbed_leftmost(struct nctabbed* nt);
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40       int nctabbed_tabcount(struct nctabbed* nt);
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42       struct ncplane* nctabbed_plane(struct nctabbed* nt);
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44       struct ncplane* nctabbed_content_plane(struct nctabbed* nt);
45
46       tabcb nctab_cb(struct nctab* t);
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48       const char* nctab_name(struct nctab* t);
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50       int nctab_name_width(struct nctab* t);
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52       void* nctab_userptr(struct nctab* t);
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54       struct nctab* nctab_next(struct nctab* t);
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56       struct nctab* nctab_prev(struct nctab* t);
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58       struct nctab* nctabbed_add(struct nctabbed* nt,  struct  nctab*  after,
59       struct nctab* before, tabcb tcb, const char* name, void* opaque**);
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61       int nctabbed_del(struct nctabbed* nt, struct nctab* t);
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63       int  nctab_move(struct nctabbed* nt, struct nctab* t, struct nctab* af‐
64       ter, struct nctab* before);
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66       void nctab_move_right(struct nctabbed* nt, struct nctab* t);
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68       void nctab_move_left(struct nctabbed* nt, struct nctab* t);
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70       void nctabbed_rotate(struct nctabbed* nt, int amt);
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72       struct nctab* nctabbed_next(struct nctabbed* nt);
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74       struct nctab* nctabbed_prev(struct nctabbed* nt);
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76       struct nctab* nctabbed_select(struct nctabbed* nt, struct nctab* t);
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78       void nctabbed_channels(struct nctabbed* nt, uint64_t* RESTRICT hdrchan,
79       uint64_t* RESTRICT selchan, uint64_t* RESTRICT sepchan);
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81       uint64_t nctabbed_hdrchan(struct nctabbed* nt);
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83       uint64_t nctabbed_selchan(struct nctabbed* nt);
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85       uint64_t nctabbed_sepchan(struct nctabbed* nt);
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87       const char* nctabbed_separator(struct nctabbed* nt);
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89       int nctabbed_separator_width(struct nctabbed* nt);
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91       void nctabbed_set_hdrchan(struct nctabbed* nt, uint64_t chan);
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93       void nctabbed_set_selchan(struct nctabbed* nt, uint64_t chan);
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95       void nctabbed_set_sepchan(struct nctabbed* nt, uint64_t chan);
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97       tabcb nctab_set_cb(struct nctab* t, tabcb newcb);
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99       int nctab_set_name(struct nctab* t, const char* newname);
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101       void* nctab_set_userptr(struct nctab* t, void* newopaque);
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103       int nctabbed_set_separator(struct nctabbed* nt, const char* separator);
104

DESCRIPTION

106       An  nctabbed  is a widget with one area for data display and a bar with
107       names of tabs.  Unless there are no tabs, exactly one tab  is  "select‐
108       ed",  and  exactly  one tab is "leftmost".  The selected tab is the one
109       that controls the tab content plane.  The leftmost tab is  the  one  of
110       which the header is visible furthest to the left.  Any tab can be moved
111       to and from anywhere in the list.  The tabs can be "rotated", which re‐
112       ally  means  the  leftmost  tab gets shifted.  The widget is drawn only
113       when nctabbed_redraw or ntabbed_create are called.
114
115   LAYOUT
116       The widget has a tab list either on the top or the bottom, 1 row thick.
117       The  tab  list contains tab headers (i.e.  their names), separated with
118       the separator specified in nctabbed_create  or  nctabbed_set_separator.
119       The  channels  for the selected tab's header, other tab headers and the
120       separator can be set independently of each other.   The  tab  separator
121       can  be  0-length, or NULL, in which case there is no visible separator
122       between tab headers.  The selected tab can be made sure to  be  visible
123       when  drawn  (by  changing  the leftmost tab) by calling the very long-
124       named nctabbed_ensure_selected_header_visible.  The rest of the  widget
125       is an ncplane housing the selected tab content.  (if any)
126
127   THE TAB CALLBACK
128       The  tab  callback  (of type tabcb) takes a tab, the tab content plane,
129       and the opaque pointer given to nctabbed_add  or  nctabbed_set_userptr.
130       It is called when the tab content is supposed to be drawn, that is when
131       the whole widget is redrawn.  It should draw the tab content and possi‐
132       bly  make  other  actions,  but it should not assume anything about the
133       current state of the tab content plane, nor should it modify  the  wid‐
134       get's or the tab's state.
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RETURN VALUES

137       nctabbed_create returns the newly created widget, or NULL when the wid‐
138       get failed to be created.  This destroys the ncplane given to  it  even
139       if it fails.
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141       nctabbed_selected  and  nctabbed_leftmost return the selected and left‐
142       most tabs, respectively.  If there are no tabs, these return NULL.
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144       nctab_name returns the tab's name.  This is not a copy, and  it  should
145       not  be stored, since it is freed when the tab's name is changed or the
146       tab is deleted.
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148       nctabbed_next, nctabbed_prev and nctabbed_select return the  newly  se‐
149       lected tab.
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151       nctabbed_separator  returns the tab separator.  This is not a copy, and
152       it should not be stored, since  it  is  freed  when  the  separator  is
153       changed or the widget is deleted.
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155       Functions returning int return -1 on failure.
156

SEE ALSO

158       notcurses(3), notcurses_channels(3), notcurses_plane(3)
159

AUTHORS

161       v3.0.8.
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165                                                           notcurses_tabbed(3)
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