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_ACTIVE = 0,             /* Dialog is visible and active */
  66     DLG_SUSPENDED = 1,          /* Dialog is suspended */
  67     DLG_CLOSED = 2              /* Dialog is closed */
  68 } dlg_state_t;
  69
  70 /* Dialog color constants */
  71 typedef enum
  72 {
  73     DLG_COLOR_NORMAL,
  74     DLG_COLOR_FOCUS,
  75     DLG_COLOR_HOT_NORMAL,
  76     DLG_COLOR_HOT_FOCUS,
  77     DLG_COLOR_TITLE,
  78     DLG_COLOR_COUNT
  79 } dlg_colors_enum_t;
  80
  81 /*** typedefs(not structures) ********************************************************************/
  82
  83 /* get string representation of shortcut assigned  with command */
  84 /* as menu is a widget of dialog, ask dialog about shortcut string */
  85 typedef char *(*dlg_shortcut_str) (unsigned long command);
  86
  87 /* get dialog name to show in dialog list */
  88 typedef char *(*dlg_title_str) (const Dlg_head * h, size_t len);
  89
  90 typedef int dlg_colors_t[DLG_COLOR_COUNT];
  91
  92 /* Dialog callback */
  93 typedef cb_ret_t (*dlg_cb_fn) (Dlg_head * h, Widget * sender, dlg_msg_t msg, int parm, void *data);
  94
  95 /* menu command execution */
  96 typedef cb_ret_t (*menu_exec_fn) (int command);
  97
  98 /*** structures declarations (and typedefs of structures)*****************************************/
  99
 100 struct Dlg_head
 101 {
 102     /* Set by the user */
 103     gboolean modal;             /* type of dialog: modal or not */
 104     dlg_flags_t flags;          /* User flags */
 105     const char *help_ctx;       /* Name of the help entry */
 106     dlg_colors_t color;         /* Color set. Unused in viewer and editor */
 107     char *title;                /* Title of the dialog */
 108
 109     /* Set and received by the user */
 110     int ret_value;              /* Result of run_dlg() */
 111
 112     /* Geometry */
 113     int x, y;                   /* Position relative to screen origin */
 114     int cols, lines;            /* Width and height of the window */
 115
 116     /* Internal flags */
 117     dlg_state_t state;
 118     gboolean fullscreen;        /* Parents dialogs don't need refresh */
 119     gboolean winch_pending;     /* SIGWINCH signal has been got. Resize dialog after rise */
 120     int mouse_status;           /* For the autorepeat status of the mouse */
 121
 122     /* Internal variables */
 123     GList *widgets;             /* widgets list */
 124     GList *current;             /* Curently active widget */
 125     void *data;                 /* Data can be passed to dialog */
 126     char *event_group;          /* Name of event group for this dialog */
 127
 128     dlg_cb_fn callback;
 129     dlg_shortcut_str get_shortcut;      /* Shortcut string */
 130     dlg_title_str get_title;    /* useless for modal dialogs */
 131 };
 132
 133 /*** global variables defined in .c file *********************************************************/
 134
 135 /* Color styles for normal and error dialogs */
 136 extern dlg_colors_t dialog_colors;
 137 extern dlg_colors_t alarm_colors;
 138
 139 extern GList *top_dlg;
 140
 141 /* A hook list for idle events */
 142 extern hook_t *idle_hook;
 143
 144 extern int fast_refresh;
 145 extern int mouse_close_dialog;
 146
 147 extern const global_keymap_t *dialog_map;
 148
 149 /*** declarations of public functions ************************************************************/
 150
 151 /* draw box in window */
 152 void draw_box (Dlg_head * h, int y, int x, int ys, int xs, gboolean single);
 153
 154 /* Creates a dialog head  */
 155 Dlg_head *create_dlg (gboolean modal, int y1, int x1, int lines, int cols,
 156                       const int *colors, dlg_cb_fn callback,
 157                       const char *help_ctx, const char *title, dlg_flags_t flags);
 158
 159 void dlg_set_default_colors (void);
 160
 161 int add_widget_autopos (Dlg_head * dest, void *w, widget_pos_flags_t pos_flags);
 162 int add_widget (Dlg_head * dest, void *w);
 163
 164 /* sets size of dialog, leaving positioning to automatic mehtods
 165    according to dialog flags */
 166 void dlg_set_size (Dlg_head * h, int lines, int cols);
 167 /* this function allows to set dialog position */
 168 void dlg_set_position (Dlg_head * h, int y1, int x1, int y2, int x2);
 169
 170 void init_dlg (Dlg_head * h);
 171 int run_dlg (Dlg_head * d);
 172 void destroy_dlg (Dlg_head * h);
 173
 174 void dlg_run_done (Dlg_head * h);
 175 void dlg_save_history (Dlg_head * h);
 176 void dlg_process_event (Dlg_head * h, int key, Gpm_Event * event);
 177
 178 char *dlg_get_title (const Dlg_head * h, size_t len);
 179
 180 /* To activate/deactivate the idle message generation */
 181 void set_idle_proc (Dlg_head * d, int enable);
 182
 183 void dlg_redraw (Dlg_head * h);
 184
 185 void dlg_broadcast_msg (Dlg_head * h, widget_msg_t message, gboolean reverse);
 186
 187 /* Default callback for dialogs */
 188 cb_ret_t default_dlg_callback (Dlg_head * h, Widget * sender, dlg_msg_t msg, int parm, void *data);
 189
 190 /* Default paint routine for dialogs */
 191 void common_dialog_repaint (Dlg_head * h);
 192
 193 void dlg_replace_widget (Widget * old, Widget * new);
 194 int dlg_overlap (Widget * a, Widget * b);
 195 void dlg_erase (Dlg_head * h);
 196 void dlg_stop (Dlg_head * h);
 197
 198 /* Widget selection */
 199 void dlg_select_widget (void *widget);
 200 void dlg_one_up (Dlg_head * h);
 201 void dlg_one_down (Dlg_head * h);
 202 int dlg_focus (Dlg_head * h);
 203 Widget *find_widget_type (const Dlg_head * h, callback_fn callback);
 204 Widget *dlg_find_by_id (const Dlg_head * h, unsigned int id);
 205 void dlg_select_by_id (const Dlg_head * h, unsigned int id);
 206
 207 /* Redraw all dialogs */
 208 void do_refresh (void);
 209
 210 /* Used in load_prompt() */
 211 void update_cursor (Dlg_head * h);
 212
 213 /*** inline functions ****************************************************************************/
 214
 215 /* Return TRUE if the widget is active, FALSE otherwise */
 216 static inline gboolean
 217 dlg_widget_active (void *w)
 218 {
 219     Widget *w1 = (Widget *) w;
 220     return ((Widget *) w1->owner->current->data == w1);
 221 }
 222
 223
 224 static inline unsigned int
 225 dlg_get_current_widget_id (const struct Dlg_head *h)
 226 {
 227     return ((Widget *) h->current->data)->id;
 228 }
 229
 230 #endif /* MC__DIALOG_H */