2 /** \file widget-common.h
3 * \brief Header: shared stuff of widgets
6 #ifndef MC__WIDGET_INTERNAL_H
7 #define MC__WIDGET_INTERNAL_H
9 #include "lib/tty/mouse.h"
10 #include "lib/widget/mouse.h" /* typedef easy_mouse_callback */
12 /*** typedefs(not structures) and defined constants **********************************************/
14 #define WIDGET(x) ((Widget *)(x))
16 #define widget_move(w, _y, _x) tty_gotoyx (WIDGET(w)->y + (_y), WIDGET(w)->x + (_x))
17 /* Sets/clear the specified flag in the options field */
18 #define widget_want_cursor(w,i) widget_set_options(w, W_WANT_CURSOR, i)
19 #define widget_want_hotkey(w,i) widget_set_options(w, W_WANT_HOTKEY, i)
20 #define widget_want_idle(w,i) widget_set_options(w, W_WANT_IDLE, i)
21 #define widget_disable(w,i) widget_set_options(w, W_DISABLED, i)
23 /*** enums ***************************************************************************************/
28 MSG_INIT
= 0, /* Initialize widget */
29 MSG_FOCUS
, /* Draw widget in focused state or widget has got focus */
30 MSG_UNFOCUS
, /* Draw widget in unfocused state or widget has been unfocused */
31 MSG_DRAW
, /* Draw widget on screen */
32 MSG_KEY
, /* Sent to widgets on key press */
33 MSG_HOTKEY
, /* Sent to widget to catch preprocess key */
34 MSG_HOTKEY_HANDLED
, /* A widget has got the hotkey */
35 MSG_UNHANDLED_KEY
, /* Key that no widget handled */
36 MSG_POST_KEY
, /* The key has been handled */
37 MSG_ACTION
, /* Send to widget to handle command */
38 MSG_NOTIFY
, /* Typically sent to dialog to inform it of state-change
39 * of listboxes, check- and radiobuttons. */
40 MSG_CURSOR
, /* Sent to widget to position the cursor */
41 MSG_IDLE
, /* The idle state is active */
42 MSG_RESIZE
, /* Screen size has changed */
43 MSG_VALIDATE
, /* Dialog is to be closed */
44 MSG_END
, /* Shut down dialog */
45 MSG_DESTROY
/* Sent to widget at destruction time */
48 /* Widgets are expected to answer to the following messages:
49 MSG_FOCUS: MSG_HANDLED if the accept the focus, MSG_NOT_HANDLED if they do not.
50 MSG_UNFOCUS: MSG_HANDLED if they accept to release the focus, MSG_NOT_HANDLED if they don't.
51 MSG_KEY: MSG_HANDLED if they actually used the key, MSG_NOT_HANDLED if not.
52 MSG_HOTKEY: MSG_HANDLED if they actually used the key, MSG_NOT_HANDLED if not.
65 W_WANT_HOTKEY
= (1 << 1),
66 W_WANT_CURSOR
= (1 << 2),
67 W_WANT_IDLE
= (1 << 3),
68 W_IS_INPUT
= (1 << 4),
69 W_DISABLED
= (1 << 5) /* Widget cannot be selected */
72 /* Flags for widget repositioning on dialog resize */
75 WPOS_CENTER_HORZ
= (1 << 0), /* center widget in horizontal */
76 WPOS_CENTER_VERT
= (1 << 1), /* center widget in vertical */
77 WPOS_KEEP_LEFT
= (1 << 2), /* keep widget distance to left border of dialog */
78 WPOS_KEEP_RIGHT
= (1 << 3), /* keep widget distance to right border of dialog */
79 WPOS_KEEP_TOP
= (1 << 4), /* keep widget distance to top border of dialog */
80 WPOS_KEEP_BOTTOM
= (1 << 5), /* keep widget distance to bottom border of dialog */
81 WPOS_KEEP_HORZ
= WPOS_KEEP_LEFT
| WPOS_KEEP_RIGHT
,
82 WPOS_KEEP_VERT
= WPOS_KEEP_TOP
| WPOS_KEEP_BOTTOM
,
83 WPOS_KEEP_ALL
= WPOS_KEEP_HORZ
| WPOS_KEEP_VERT
,
84 WPOS_KEEP_DEFAULT
= WPOS_KEEP_LEFT
| WPOS_KEEP_TOP
86 /* NOTE: if WPOS_CENTER_HORZ flag is used, other horizontal flags (WPOS_KEEP_LEFT, WPOS_KEEP_RIGHT,
87 * and WPOS_KEEP_HORZ are ignored).
88 * If WPOS_CENTER_VERT flag is used, other horizontal flags (WPOS_KEEP_TOP, WPOS_KEEP_BOTTOM,
89 * and WPOS_KEEP_VERT are ignored).
92 /*** structures declarations (and typedefs of structures)*****************************************/
95 typedef cb_ret_t (*widget_cb_fn
) (Widget
* widget
, Widget
* sender
, widget_msg_t msg
, int parm
,
98 /* Every Widget must have this as its first element */
103 widget_options_t options
;
104 widget_pos_flags_t pos_flags
; /* repositioning flags */
105 unsigned int id
; /* Number of the widget, starting with 0 */
106 widget_cb_fn callback
;
108 void (*set_options
) (Widget
* w
, widget_options_t options
, gboolean enable
);
110 /* Mouse-related fields. */
113 easy_mouse_callback callback
;
114 gboolean capture
; /* Whether the widget "owns" the mouse. */
115 gboolean forced_capture
; /* Overrides the above. Set explicitly by the programmer. */
117 /* "Mouse" capitalized -- as we already have a lowercase "mouse" here.
118 * @FIXME: rename "mouse" to something else. */
121 /* structure for label (caption) with hotkey, if original text does not contain
122 * hotkey, only start is valid and is equal to original text
123 * hotkey is defined as char*, but mc support only singlebyte hotkey
125 typedef struct hotkey_t
132 /*** global variables defined in .c file *********************************************************/
134 /*** declarations of public functions ************************************************************/
136 /* create hotkey from text */
137 hotkey_t
parse_hotkey (const char *text
);
138 /* release hotkey, free all mebers of hotkey_t */
139 void release_hotkey (const hotkey_t hotkey
);
140 /* return width on terminal of hotkey */
141 int hotkey_width (const hotkey_t hotkey
);
142 /* draw hotkey of widget */
143 void hotkey_draw (Widget
* w
, const hotkey_t hotkey
, gboolean focused
);
145 /* widget initialization */
146 void widget_init (Widget
* w
, int y
, int x
, int lines
, int cols
,
147 widget_cb_fn callback
, mouse_h mouse_handler
);
148 /* Default callback for widgets */
149 cb_ret_t
widget_default_callback (Widget
* w
, Widget
* sender
, widget_msg_t msg
, int parm
,
151 void widget_default_set_options_callback (Widget
* w
, widget_options_t options
, gboolean enable
);
152 void widget_set_options (Widget
* w
, widget_options_t options
, gboolean enable
);
153 void widget_set_size (Widget
* widget
, int y
, int x
, int lines
, int cols
);
154 /* select color for widget in dependance of state */
155 void widget_selectcolor (Widget
* w
, gboolean focused
, gboolean hotkey
);
156 void widget_redraw (Widget
* w
);
157 void widget_erase (Widget
* w
);
158 gboolean
widget_is_active (const void *w
);
159 gboolean
widget_overlapped (const Widget
* a
, const Widget
* b
);
160 void widget_replace (Widget
* old
, Widget
* new);
162 /* get mouse pointer location within widget */
163 Gpm_Event
mouse_get_local (const Gpm_Event
* global
, const Widget
* w
);
164 gboolean
mouse_global_in_widget (const Gpm_Event
* event
, const Widget
* w
);
166 /* --------------------------------------------------------------------------------------------- */
167 /*** inline functions ****************************************************************************/
168 /* --------------------------------------------------------------------------------------------- */
170 static inline cb_ret_t
171 send_message (void *w
, void *sender
, widget_msg_t msg
, int parm
, void *data
)
173 cb_ret_t ret
= MSG_NOT_HANDLED
;
176 if (w
!= NULL
) /* This must be always true, but... */
178 ret
= WIDGET (w
)->callback (WIDGET (w
), WIDGET (sender
), msg
, parm
, data
);
183 /* --------------------------------------------------------------------------------------------- */
185 #endif /* MC__WIDGET_INTERNAL_H */