lib/widget/dialog.h

   1 /*
   2    Dialog box features module for the Midnight Commander
   3  */
   4
   5 /** \file dialog.h
   6  *  \brief Header: dialog box features module
   7  */
   8
   9 #ifndef MC__DIALOG_H
  10 #define MC__DIALOG_H
  11
  12 #include <sys/types.h>          /* size_t */
  13
  14 #include "lib/global.h"
  15 #include "lib/hook.h"           /* hook_t */
  16 #include "lib/keybind.h"        /* global_keymap_t */
  17
  18 /*** defined constants ***************************************************************************/
  19
  20 /* Common return values */
  21 #define B_EXIT          0
  22 #define B_CANCEL        1
  23 #define B_ENTER         2
  24 #define B_HELP          3
  25 #define B_USER          100
  26
  27 #define dlg_move(h, _y, _x) tty_gotoyx (((Dlg_head *)(h))->y + _y, ((Dlg_head *)(h))->x + _x)
  28
  29 /*** enums ***************************************************************************************/
  30
  31 /* Dialog messages */
  32 typedef enum
  33 {
  34     DLG_INIT = 0,               /* Initialize dialog */
  35     DLG_IDLE = 1,               /* The idle state is active */
  36     DLG_DRAW = 2,               /* Draw dialog on screen */
  37     DLG_FOCUS = 3,              /* A widget has got focus */
  38     DLG_UNFOCUS = 4,            /* A widget has been unfocused */
  39     DLG_RESIZE = 5,             /* Window size has changed */
  40     DLG_KEY = 6,                /* Key before sending to widget */
  41     DLG_HOTKEY_HANDLED = 7,     /* A widget has got the hotkey */
  42     DLG_POST_KEY = 8,           /* The key has been handled */
  43     DLG_UNHANDLED_KEY = 9,      /* Key that no widget handled */
  44     DLG_ACTION = 10,            /* State of check- and radioboxes has changed
  45                                  * and listbox current entry has changed */
  46     DLG_VALIDATE = 11,          /* Dialog is to be closed */
  47     DLG_END = 12                /* Shut down dialog */
  48 } dlg_msg_t;
  49
  50 /* Flags for create_dlg */
  51 typedef enum
  52 {
  53     DLG_REVERSE = (1 << 5),     /* Tab order is opposite to the add order */
  54     DLG_WANT_TAB = (1 << 4),    /* Should the tab key be sent to the dialog? */
  55     DLG_WANT_IDLE = (1 << 3),   /* Dialog wants idle events */
  56     DLG_COMPACT = (1 << 2),     /* Suppress spaces around the frame */
  57     DLG_TRYUP = (1 << 1),       /* Try to move two lines up the dialog */
  58     DLG_CENTER = (1 << 0),      /* Center the dialog */
  59     DLG_NONE = 0                /* No options */
  60 } dlg_flags_t;
  61
  62 /* Dialog state */
  63 typedef enum
  64 {
  65     DLG_CONSTRUCT = 0,          /* DIalog has been constructed but bot run yet */
  66     DLG_ACTIVE = 1,             /* Dialog is visible and active */
  67     DLG_SUSPENDED = 2,          /* Dialog is suspended */
  68     DLG_CLOSED = 3              /* Dialog is closed */
  69 } dlg_state_t;
  70
  71 /* Dialog color constants */
  72 typedef enum
  73 {
  74     DLG_COLOR_NORMAL,
  75     DLG_COLOR_FOCUS,
  76     DLG_COLOR_HOT_NORMAL,
  77     DLG_COLOR_HOT_FOCUS,
  78     DLG_COLOR_TITLE,
  79     DLG_COLOR_COUNT
  80 } dlg_colors_enum_t;
  81
  82 /*** typedefs(not structures) ********************************************************************/
  83
  84 /* get string representation of shortcut assigned  with command */
  85 /* as menu is a widget of dialog, ask dialog about shortcut string */
  86 typedef char *(*dlg_shortcut_str) (unsigned long command);
  87
  88 /* get dialog name to show in dialog list */
  89 typedef char *(*dlg_title_str) (const Dlg_head * h, size_t len);
  90
  91 typedef int dlg_colors_t[DLG_COLOR_COUNT];
  92
  93 /* Dialog callback */
  94 typedef cb_ret_t (*dlg_cb_fn) (Dlg_head * h, Widget * sender, dlg_msg_t msg, int parm, void *data);
  95
  96 /* menu command execution */
  97 typedef cb_ret_t (*menu_exec_fn) (int command);
  98
  99 /*** structures declarations (and typedefs of structures)*****************************************/
 100
 101 struct Dlg_head
 102 {
 103     /* Set by the user */
 104     gboolean modal;             /* type of dialog: modal or not */
 105     dlg_flags_t flags;          /* User flags */
 106     const char *help_ctx;       /* Name of the help entry */
 107     dlg_colors_t color;         /* Color set. Unused in viewer and editor */
 108     char *title;                /* Title of the dialog */
 109
 110     /* Set and received by the user */
 111     int ret_value;              /* Result of run_dlg() */
 112
 113     /* Geometry */
 114     int x, y;                   /* Position relative to screen origin */
 115     int cols, lines;            /* Width and height of the window */
 116
 117     /* Internal flags */
 118     dlg_state_t state;
 119     gboolean fullscreen;        /* Parents dialogs don't need refresh */
 120     gboolean winch_pending;     /* SIGWINCH signal has been got. Resize dialog after rise */
 121     int mouse_status;           /* For the autorepeat status of the mouse */
 122
 123     /* Internal variables */
 124     GList *widgets;             /* widgets list */
 125     GList *current;             /* Curently active widget */
 126     unsigned long widget_id;    /* maximum id of all widgets */
 127     void *data;                 /* Data can be passed to dialog */
 128     char *event_group;          /* Name of event group for this dialog */
 129
 130     dlg_cb_fn callback;
 131     dlg_shortcut_str get_shortcut;      /* Shortcut string */
 132     dlg_title_str get_title;    /* useless for modal dialogs */
 133 };
 134
 135 /*** global variables defined in .c file *********************************************************/
 136
 137 /* Color styles for normal and error dialogs */
 138 extern dlg_colors_t dialog_colors;
 139 extern dlg_colors_t alarm_colors;
 140
 141 extern GList *top_dlg;
 142
 143 /* A hook list for idle events */
 144 extern hook_t *idle_hook;
 145
 146 extern int fast_refresh;
 147 extern int mouse_close_dialog;
 148
 149 extern const global_keymap_t *dialog_map;
 150
 151 /*** declarations of public functions ************************************************************/
 152
 153 /* draw box in window */
 154 void draw_box (Dlg_head * h, int y, int x, int ys, int xs, gboolean single);
 155
 156 /* Creates a dialog head  */
 157 Dlg_head *create_dlg (gboolean modal, int y1, int x1, int lines, int cols,
 158                       const int *colors, dlg_cb_fn callback,
 159                       const char *help_ctx, const char *title, dlg_flags_t flags);
 160
 161 void dlg_set_default_colors (void);
 162
 163 unsigned long add_widget_autopos (Dlg_head * dest, void *w, widget_pos_flags_t pos_flags,
 164                                   const void *before);
 165 unsigned long add_widget (Dlg_head * dest, void *w);
 166 unsigned long add_widget_before (Dlg_head * h, void *w, void *before);
 167 void del_widget (void *w);
 168
 169 /* sets size of dialog, leaving positioning to automatic mehtods
 170    according to dialog flags */
 171 void dlg_set_size (Dlg_head * h, int lines, int cols);
 172 /* this function allows to set dialog position */
 173 void dlg_set_position (Dlg_head * h, int y1, int x1, int y2, int x2);
 174
 175 void init_dlg (Dlg_head * h);
 176 int run_dlg (Dlg_head * d);
 177 void destroy_dlg (Dlg_head * h);
 178
 179 void dlg_run_done (Dlg_head * h);
 180 void dlg_save_history (Dlg_head * h);
 181 void dlg_process_event (Dlg_head * h, int key, Gpm_Event * event);
 182
 183 char *dlg_get_title (const Dlg_head * h, size_t len);
 184
 185 /* To activate/deactivate the idle message generation */
 186 void set_idle_proc (Dlg_head * d, int enable);
 187
 188 void dlg_redraw (Dlg_head * h);
 189
 190 void dlg_broadcast_msg (Dlg_head * h, widget_msg_t message, gboolean reverse);
 191
 192 /* Default callback for dialogs */
 193 cb_ret_t default_dlg_callback (Dlg_head * h, Widget * sender, dlg_msg_t msg, int parm, void *data);
 194
 195 /* Default paint routine for dialogs */
 196 void common_dialog_repaint (Dlg_head * h);
 197
 198 void dlg_replace_widget (Widget * old, Widget * new);
 199 int dlg_overlap (Widget * a, Widget * b);
 200 void dlg_erase (Dlg_head * h);
 201 void dlg_stop (Dlg_head * h);
 202
 203 /* Widget selection */
 204 void dlg_select_widget (void *w);
 205 void dlg_set_top_widget (void *w);
 206 void dlg_one_up (Dlg_head * h);
 207 void dlg_one_down (Dlg_head * h);
 208 gboolean dlg_focus (Dlg_head * h);
 209 Widget *find_widget_type (const Dlg_head * h, callback_fn callback);
 210 Widget *dlg_find_by_id (const Dlg_head * h, unsigned long id);
 211 void dlg_select_by_id (const Dlg_head * h, unsigned long id);
 212
 213 /* Redraw all dialogs */
 214 void do_refresh (void);
 215
 216 /* Used in load_prompt() */
 217 void update_cursor (Dlg_head * h);
 218
 219 /*** inline functions ****************************************************************************/
 220
 221 /* Return TRUE if the widget is active, FALSE otherwise */
 222 static inline gboolean
 223 dlg_widget_active (void *w)
 224 {
 225     Widget *w1 = (Widget *) w;
 226     return ((Widget *) w1->owner->current->data == w1);
 227 }
 228
 229 /* --------------------------------------------------------------------------------------------- */
 230
 231 static inline unsigned long
 232 dlg_get_current_widget_id (const struct Dlg_head *h)
 233 {
 234     return ((Widget *) h->current->data)->id;
 235 }
 236
 237 #endif /* MC__DIALOG_H */