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Diffstat (limited to 'lib/widget/menu.c')
| -rw-r--r-- | lib/widget/menu.c | 1092 |
1 files changed, 1092 insertions, 0 deletions
diff --git a/lib/widget/menu.c b/lib/widget/menu.c new file mode 100644 index 0000000..32ee74c --- /dev/null +++ b/lib/widget/menu.c @@ -0,0 +1,1092 @@ +/* + Pulldown menu code + + Copyright (C) 1994-2022 + Free Software Foundation, Inc. + + Written by: + Andrew Borodin <aborodin@vmail.ru>, 2012-2022 + + This file is part of the Midnight Commander. + + The Midnight Commander is free software: you can redistribute it + and/or modify it under the terms of the GNU General Public License as + published by the Free Software Foundation, either version 3 of the License, + or (at your option) any later version. + + The Midnight Commander is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +/** \file menu.c + * \brief Source: pulldown menu code + */ + +#include <config.h> + +#include <ctype.h> +#include <stdarg.h> +#include <string.h> +#include <sys/types.h> + +#include "lib/global.h" + +#include "lib/tty/tty.h" +#include "lib/skin.h" +#include "lib/tty/key.h" /* key macros */ +#include "lib/strutil.h" +#include "lib/widget.h" +#include "lib/event.h" /* mc_event_raise() */ + +/*** global variables ****************************************************************************/ + +const global_keymap_t *menu_map = NULL; + +/*** file scope macro definitions ****************************************************************/ + +#define MENUENTRY(x) ((menu_entry_t *)(x)) +#define MENU(x) ((menu_t *)(x)) + +/*** file scope type declarations ****************************************************************/ + +struct menu_entry_t +{ + unsigned char first_letter; + hotkey_t text; + long command; + char *shortcut; +}; + +struct menu_t +{ + int start_x; /* position relative to menubar start */ + hotkey_t text; + GList *entries; + size_t max_entry_len; /* cached max length of entry texts (text + shortcut) */ + size_t max_hotkey_len; /* cached max length of shortcuts */ + unsigned int selected; /* pointer to current menu entry */ + char *help_node; +}; + +/*** file scope variables ************************************************************************/ + +/*** file scope functions ************************************************************************/ +/* --------------------------------------------------------------------------------------------- */ + +static void +menu_arrange (menu_t * menu, dlg_shortcut_str get_shortcut) +{ + if (menu != NULL) + { + GList *i; + size_t max_shortcut_len = 0; + + menu->max_entry_len = 1; + menu->max_hotkey_len = 1; + + for (i = menu->entries; i != NULL; i = g_list_next (i)) + { + menu_entry_t *entry = MENUENTRY (i->data); + + if (entry != NULL) + { + size_t len; + + len = (size_t) hotkey_width (entry->text); + menu->max_hotkey_len = MAX (menu->max_hotkey_len, len); + + if (get_shortcut != NULL) + entry->shortcut = get_shortcut (entry->command); + + if (entry->shortcut != NULL) + { + len = (size_t) str_term_width1 (entry->shortcut); + max_shortcut_len = MAX (max_shortcut_len, len); + } + } + } + + menu->max_entry_len = menu->max_hotkey_len + max_shortcut_len; + } +} + +/* --------------------------------------------------------------------------------------------- */ + +static void +menubar_paint_idx (const WMenuBar * menubar, unsigned int idx, int color) +{ + const WRect *w = &CONST_WIDGET (menubar)->rect; + const menu_t *menu = MENU (g_list_nth_data (menubar->menu, menubar->selected)); + const menu_entry_t *entry = MENUENTRY (g_list_nth_data (menu->entries, idx)); + const int y = 2 + idx; + int x = menu->start_x; + + if (x + menu->max_entry_len + 4 > (gsize) w->cols) + x = w->cols - menu->max_entry_len - 4; + + if (entry == NULL) + { + /* menu separator */ + tty_setcolor (MENU_ENTRY_COLOR); + + widget_gotoyx (menubar, y, x - 1); + tty_print_alt_char (ACS_LTEE, FALSE); + tty_draw_hline (w->y + y, w->x + x, ACS_HLINE, menu->max_entry_len + 3); + widget_gotoyx (menubar, y, x + menu->max_entry_len + 3); + tty_print_alt_char (ACS_RTEE, FALSE); + } + else + { + int yt, xt; + + /* menu text */ + tty_setcolor (color); + widget_gotoyx (menubar, y, x); + tty_print_char ((unsigned char) entry->first_letter); + tty_getyx (&yt, &xt); + tty_draw_hline (yt, xt, ' ', menu->max_entry_len + 2); /* clear line */ + tty_print_string (entry->text.start); + + if (entry->text.hotkey != NULL) + { + tty_setcolor (color == MENU_SELECTED_COLOR ? MENU_HOTSEL_COLOR : MENU_HOT_COLOR); + tty_print_string (entry->text.hotkey); + tty_setcolor (color); + } + + if (entry->text.end != NULL) + tty_print_string (entry->text.end); + + if (entry->shortcut != NULL) + { + widget_gotoyx (menubar, y, x + menu->max_hotkey_len + 3); + tty_print_string (entry->shortcut); + } + + /* move cursor to the start of entry text */ + widget_gotoyx (menubar, y, x + 1); + } +} + +/* --------------------------------------------------------------------------------------------- */ + +static void +menubar_draw_drop (const WMenuBar * menubar) +{ + const WRect *w = &CONST_WIDGET (menubar)->rect; + const menu_t *menu = MENU (g_list_nth_data (menubar->menu, menubar->selected)); + const unsigned int count = g_list_length (menu->entries); + int column = menu->start_x - 1; + unsigned int i; + + if (column + menu->max_entry_len + 5 > (gsize) w->cols) + column = w->cols - menu->max_entry_len - 5; + + if (mc_global.tty.shadows) + tty_draw_box_shadow (w->y + 1, w->x + column, count + 2, menu->max_entry_len + 5, + SHADOW_COLOR); + + tty_setcolor (MENU_ENTRY_COLOR); + tty_draw_box (w->y + 1, w->x + column, count + 2, menu->max_entry_len + 5, FALSE); + + for (i = 0; i < count; i++) + menubar_paint_idx (menubar, i, + i == menu->selected ? MENU_SELECTED_COLOR : MENU_ENTRY_COLOR); +} + +/* --------------------------------------------------------------------------------------------- */ + +static void +menubar_set_color (const WMenuBar * menubar, gboolean current, gboolean hotkey) +{ + if (!widget_get_state (CONST_WIDGET (menubar), WST_FOCUSED)) + tty_setcolor (MENU_INACTIVE_COLOR); + else if (current) + tty_setcolor (hotkey ? MENU_HOTSEL_COLOR : MENU_SELECTED_COLOR); + else + tty_setcolor (hotkey ? MENU_HOT_COLOR : MENU_ENTRY_COLOR); +} + +/* --------------------------------------------------------------------------------------------- */ + +static void +menubar_draw (const WMenuBar * menubar) +{ + const WRect *w = &CONST_WIDGET (menubar)->rect; + GList *i; + + /* First draw the complete menubar */ + tty_setcolor (widget_get_state (WIDGET (menubar), WST_FOCUSED) ? MENU_ENTRY_COLOR : + MENU_INACTIVE_COLOR); + tty_draw_hline (w->y, w->x, ' ', w->cols); + + /* Now each one of the entries */ + for (i = menubar->menu; i != NULL; i = g_list_next (i)) + { + menu_t *menu = MENU (i->data); + gboolean is_selected = (menubar->selected == (gsize) g_list_position (menubar->menu, i)); + + menubar_set_color (menubar, is_selected, FALSE); + widget_gotoyx (menubar, 0, menu->start_x); + + tty_print_char (' '); + tty_print_string (menu->text.start); + + if (menu->text.hotkey != NULL) + { + menubar_set_color (menubar, is_selected, TRUE); + tty_print_string (menu->text.hotkey); + menubar_set_color (menubar, is_selected, FALSE); + } + + if (menu->text.end != NULL) + tty_print_string (menu->text.end); + + tty_print_char (' '); + } + + if (menubar->is_dropped) + menubar_draw_drop (menubar); + else + widget_gotoyx (menubar, 0, + MENU (g_list_nth_data (menubar->menu, menubar->selected))->start_x); +} + +/* --------------------------------------------------------------------------------------------- */ + +static void +menubar_remove (WMenuBar * menubar) +{ + Widget *g; + + if (!menubar->is_dropped) + return; + + /* HACK: before refresh the dialog, change the current widget to keep the order + of overlapped widgets. This is useful in multi-window editor. + In general, menubar should be a special object, not an ordinary widget + in the current dialog. */ + g = WIDGET (WIDGET (menubar)->owner); + GROUP (g)->current = widget_find (g, widget_find_by_id (g, menubar->previous_widget)); + + menubar->is_dropped = FALSE; + do_refresh (); + menubar->is_dropped = TRUE; + + /* restore current widget */ + GROUP (g)->current = widget_find (g, WIDGET (menubar)); +} + +/* --------------------------------------------------------------------------------------------- */ + +static void +menubar_left (WMenuBar * menubar) +{ + menubar_remove (menubar); + if (menubar->selected == 0) + menubar->selected = g_list_length (menubar->menu) - 1; + else + menubar->selected--; + menubar_draw (menubar); +} + +/* --------------------------------------------------------------------------------------------- */ + +static void +menubar_right (WMenuBar * menubar) +{ + menubar_remove (menubar); + menubar->selected = (menubar->selected + 1) % g_list_length (menubar->menu); + menubar_draw (menubar); +} + +/* --------------------------------------------------------------------------------------------- */ + +static void +menubar_finish (WMenuBar * menubar) +{ + Widget *w = WIDGET (menubar); + + menubar->is_dropped = FALSE; + w->rect.lines = 1; + widget_want_hotkey (w, FALSE); + widget_set_options (w, WOP_SELECTABLE, FALSE); + + if (!mc_global.keybar_visible) + widget_hide (w); + else + { + /* Move the menubar to the bottom so that widgets displayed on top of + * an "invisible" menubar get the first chance to respond to mouse events. */ + widget_set_bottom (w); + } + + /* background must be bottom */ + if (DIALOG (w->owner)->bg != NULL) + widget_set_bottom (WIDGET (DIALOG (w->owner)->bg)); + + group_select_widget_by_id (w->owner, menubar->previous_widget); + do_refresh (); +} + +/* --------------------------------------------------------------------------------------------- */ + +static void +menubar_drop (WMenuBar * menubar, unsigned int selected) +{ + menubar->is_dropped = TRUE; + menubar->selected = selected; + menubar_draw (menubar); +} + +/* --------------------------------------------------------------------------------------------- */ + +static void +menubar_execute (WMenuBar * menubar) +{ + const menu_t *menu = MENU (g_list_nth_data (menubar->menu, menubar->selected)); + const menu_entry_t *entry = MENUENTRY (g_list_nth_data (menu->entries, menu->selected)); + + if ((entry != NULL) && (entry->command != CK_IgnoreKey)) + { + Widget *w = WIDGET (menubar); + + mc_global.widget.is_right = (menubar->selected != 0); + menubar_finish (menubar); + send_message (w->owner, w, MSG_ACTION, entry->command, NULL); + do_refresh (); + } +} + +/* --------------------------------------------------------------------------------------------- */ + +static void +menubar_down (WMenuBar * menubar) +{ + menu_t *menu = MENU (g_list_nth_data (menubar->menu, menubar->selected)); + const unsigned int len = g_list_length (menu->entries); + menu_entry_t *entry; + + menubar_paint_idx (menubar, menu->selected, MENU_ENTRY_COLOR); + + do + { + menu->selected = (menu->selected + 1) % len; + entry = MENUENTRY (g_list_nth_data (menu->entries, menu->selected)); + } + while ((entry == NULL) || (entry->command == CK_IgnoreKey)); + + menubar_paint_idx (menubar, menu->selected, MENU_SELECTED_COLOR); +} + +/* --------------------------------------------------------------------------------------------- */ + +static void +menubar_up (WMenuBar * menubar) +{ + menu_t *menu = MENU (g_list_nth_data (menubar->menu, menubar->selected)); + const unsigned int len = g_list_length (menu->entries); + menu_entry_t *entry; + + menubar_paint_idx (menubar, menu->selected, MENU_ENTRY_COLOR); + + do + { + if (menu->selected == 0) + menu->selected = len - 1; + else + menu->selected--; + entry = MENUENTRY (g_list_nth_data (menu->entries, menu->selected)); + } + while ((entry == NULL) || (entry->command == CK_IgnoreKey)); + + menubar_paint_idx (menubar, menu->selected, MENU_SELECTED_COLOR); +} + +/* --------------------------------------------------------------------------------------------- */ + +static void +menubar_first (WMenuBar * menubar) +{ + if (menubar->is_dropped) + { + menu_t *menu = MENU (g_list_nth_data (menubar->menu, menubar->selected)); + + if (menu->selected == 0) + return; + + menubar_paint_idx (menubar, menu->selected, MENU_ENTRY_COLOR); + + menu->selected = 0; + + while (TRUE) + { + menu_entry_t *entry; + + entry = MENUENTRY (g_list_nth_data (menu->entries, menu->selected)); + + if ((entry == NULL) || (entry->command == CK_IgnoreKey)) + menu->selected++; + else + break; + } + + menubar_paint_idx (menubar, menu->selected, MENU_SELECTED_COLOR); + } + else + { + menubar->selected = 0; + menubar_draw (menubar); + } +} + +/* --------------------------------------------------------------------------------------------- */ + +static void +menubar_last (WMenuBar * menubar) +{ + if (menubar->is_dropped) + { + menu_t *menu = MENU (g_list_nth_data (menubar->menu, menubar->selected)); + const unsigned int len = g_list_length (menu->entries); + menu_entry_t *entry; + + if (menu->selected == len - 1) + return; + + menubar_paint_idx (menubar, menu->selected, MENU_ENTRY_COLOR); + + menu->selected = len; + + do + { + menu->selected--; + entry = MENUENTRY (g_list_nth_data (menu->entries, menu->selected)); + } + while ((entry == NULL) || (entry->command == CK_IgnoreKey)); + + menubar_paint_idx (menubar, menu->selected, MENU_SELECTED_COLOR); + } + else + { + menubar->selected = g_list_length (menubar->menu) - 1; + menubar_draw (menubar); + } +} + +/* --------------------------------------------------------------------------------------------- */ + +static cb_ret_t +menubar_try_drop_menu (WMenuBar * menubar, int hotkey) +{ + GList *i; + + for (i = menubar->menu; i != NULL; i = g_list_next (i)) + { + menu_t *menu = MENU (i->data); + + if (menu->text.hotkey != NULL && hotkey == g_ascii_tolower (menu->text.hotkey[0])) + { + menubar_drop (menubar, g_list_position (menubar->menu, i)); + return MSG_HANDLED; + } + } + + return MSG_NOT_HANDLED; +} + +/* --------------------------------------------------------------------------------------------- */ + +static cb_ret_t +menubar_try_exec_menu (WMenuBar * menubar, int hotkey) +{ + menu_t *menu; + GList *i; + + menu = g_list_nth_data (menubar->menu, menubar->selected); + + for (i = menu->entries; i != NULL; i = g_list_next (i)) + { + const menu_entry_t *entry = MENUENTRY (i->data); + + if (entry != NULL && entry->text.hotkey != NULL + && hotkey == g_ascii_tolower (entry->text.hotkey[0])) + { + menu->selected = g_list_position (menu->entries, i); + menubar_execute (menubar); + return MSG_HANDLED; + } + } + + return MSG_NOT_HANDLED; +} + +/* --------------------------------------------------------------------------------------------- */ + +static cb_ret_t +menubar_execute_cmd (WMenuBar * menubar, long command) +{ + cb_ret_t ret = MSG_HANDLED; + + switch (command) + { + case CK_Help: + { + ev_help_t event_data = { NULL, NULL }; + + if (menubar->is_dropped) + event_data.node = + MENU (g_list_nth_data (menubar->menu, menubar->selected))->help_node; + else + event_data.node = "[Menu Bar]"; + + mc_event_raise (MCEVENT_GROUP_CORE, "help", &event_data); + menubar_draw (menubar); + } + break; + + case CK_Left: + menubar_left (menubar); + break; + case CK_Right: + menubar_right (menubar); + break; + case CK_Up: + if (menubar->is_dropped) + menubar_up (menubar); + break; + case CK_Down: + if (menubar->is_dropped) + menubar_down (menubar); + else + menubar_drop (menubar, menubar->selected); + break; + case CK_Home: + menubar_first (menubar); + break; + case CK_End: + menubar_last (menubar); + break; + + case CK_Enter: + if (menubar->is_dropped) + menubar_execute (menubar); + else + menubar_drop (menubar, menubar->selected); + break; + case CK_Quit: + menubar_finish (menubar); + break; + + default: + ret = MSG_NOT_HANDLED; + break; + } + + return ret; +} + +/* --------------------------------------------------------------------------------------------- */ + +static int +menubar_handle_key (WMenuBar * menubar, int key) +{ + long cmd; + cb_ret_t ret = MSG_NOT_HANDLED; + + cmd = widget_lookup_key (WIDGET (menubar), key); + + if (cmd != CK_IgnoreKey) + ret = menubar_execute_cmd (menubar, cmd); + + if (ret != MSG_HANDLED) + { + if (menubar->is_dropped) + ret = menubar_try_exec_menu (menubar, key); + else + ret = menubar_try_drop_menu (menubar, key); + } + + return ret; +} + +/* --------------------------------------------------------------------------------------------- */ + +static gboolean +menubar_refresh (WMenuBar * menubar) +{ + Widget *w = WIDGET (menubar); + + if (!widget_get_state (w, WST_FOCUSED)) + return FALSE; + + /* Trick to get all the mouse events */ + w->rect.lines = LINES; + + /* Trick to get all of the hotkeys */ + widget_want_hotkey (w, TRUE); + return TRUE; +} + +/* --------------------------------------------------------------------------------------------- */ + +static inline void +menubar_free_menu (WMenuBar * menubar) +{ + g_clear_list (&menubar->menu, (GDestroyNotify) destroy_menu); +} + +/* --------------------------------------------------------------------------------------------- */ + +static cb_ret_t +menubar_callback (Widget * w, Widget * sender, widget_msg_t msg, int parm, void *data) +{ + WMenuBar *menubar = MENUBAR (w); + + switch (msg) + { + /* We do not want the focus unless we have been activated */ + case MSG_FOCUS: + if (menubar_refresh (menubar)) + { + menubar_draw (menubar); + return MSG_HANDLED; + } + return MSG_NOT_HANDLED; + + case MSG_UNFOCUS: + return widget_get_state (w, WST_FOCUSED) ? MSG_NOT_HANDLED : MSG_HANDLED; + + /* We don't want the buttonbar to activate while using the menubar */ + case MSG_HOTKEY: + case MSG_KEY: + if (widget_get_state (w, WST_FOCUSED)) + { + menubar_handle_key (menubar, parm); + return MSG_HANDLED; + } + return MSG_NOT_HANDLED; + + case MSG_CURSOR: + /* Put the cursor in a suitable place */ + return MSG_NOT_HANDLED; + + case MSG_DRAW: + if (widget_get_state (w, WST_VISIBLE) || menubar_refresh (menubar)) + menubar_draw (menubar); + return MSG_HANDLED; + + case MSG_RESIZE: + /* try show menu after screen resize */ + widget_default_callback (w, NULL, MSG_RESIZE, 0, data); + menubar_refresh (menubar); + return MSG_HANDLED; + + case MSG_DESTROY: + menubar_free_menu (menubar); + return MSG_HANDLED; + + default: + return widget_default_callback (w, sender, msg, parm, data); + } +} + +/* --------------------------------------------------------------------------------------------- */ + +static unsigned int +menubar_get_menu_by_x_coord (const WMenuBar * menubar, int x) +{ + unsigned int i; + GList *menu; + + for (i = 0, menu = menubar->menu; + menu != NULL && x >= MENU (menu->data)->start_x; i++, menu = g_list_next (menu)) + ; + + /* Don't set the invalid value -1 */ + if (i != 0) + i--; + + return i; +} + +/* --------------------------------------------------------------------------------------------- */ + +static gboolean +menubar_mouse_on_menu (const WMenuBar * menubar, int y, int x) +{ + const WRect *w = &CONST_WIDGET (menubar)->rect; + menu_t *menu; + int left_x, right_x, bottom_y; + + if (!menubar->is_dropped) + return FALSE; + + menu = MENU (g_list_nth_data (menubar->menu, menubar->selected)); + left_x = menu->start_x; + right_x = left_x + menu->max_entry_len + 3; + if (right_x > w->cols) + { + left_x = w->cols - (menu->max_entry_len + 3); + right_x = w->cols; + } + + bottom_y = g_list_length (menu->entries) + 2; /* skip bar and top frame */ + + return (x >= left_x && x < right_x && y > 1 && y < bottom_y); +} + +/* --------------------------------------------------------------------------------------------- */ + +static void +menubar_change_selected_item (WMenuBar * menubar, int y) +{ + menu_t *menu; + menu_entry_t *entry; + + y -= 2; /* skip bar and top frame */ + menu = MENU (g_list_nth_data (menubar->menu, menubar->selected)); + entry = MENUENTRY (g_list_nth_data (menu->entries, y)); + + if (entry != NULL && entry->command != CK_IgnoreKey) + { + menubar_paint_idx (menubar, menu->selected, MENU_ENTRY_COLOR); + menu->selected = y; + menubar_paint_idx (menubar, menu->selected, MENU_SELECTED_COLOR); + } +} + +/* --------------------------------------------------------------------------------------------- */ + +static void +menubar_mouse_callback (Widget * w, mouse_msg_t msg, mouse_event_t * event) +{ + static gboolean was_drag = FALSE; + + WMenuBar *menubar = MENUBAR (w); + gboolean mouse_on_drop; + + mouse_on_drop = menubar_mouse_on_menu (menubar, event->y, event->x); + + switch (msg) + { + case MSG_MOUSE_DOWN: + was_drag = FALSE; + + if (event->y == 0) + { + /* events on menubar */ + unsigned int selected; + + selected = menubar_get_menu_by_x_coord (menubar, event->x); + menubar_activate (menubar, TRUE, selected); + menubar_remove (menubar); /* if already shown */ + menubar_drop (menubar, selected); + } + else if (mouse_on_drop) + menubar_change_selected_item (menubar, event->y); + else + { + /* mouse click outside menubar or dropdown -- close menu */ + menubar_finish (menubar); + + /* + * @FIXME. + * + * Unless we clear the 'capture' flag, we'll receive MSG_MOUSE_DRAG + * events belonging to this click (in case the user drags the mouse, + * of course). + * + * For the time being, we mark this with FIXME as this flag should + * preferably be regarded as "implementation detail" and not be + * touched by us. We should think of some other way of communicating + * this to the system. + */ + w->mouse.capture = FALSE; + } + break; + + case MSG_MOUSE_UP: + if (was_drag && mouse_on_drop) + menubar_execute (menubar); + was_drag = FALSE; + break; + + case MSG_MOUSE_CLICK: + was_drag = FALSE; + + if ((event->buttons & GPM_B_MIDDLE) != 0 && event->y > 0 && menubar->is_dropped) + { + /* middle click -- everywhere */ + menubar_execute (menubar); + } + else if (mouse_on_drop) + menubar_execute (menubar); + else if (event->y > 0) + /* releasing the mouse button outside the menu -- close menu */ + menubar_finish (menubar); + break; + + case MSG_MOUSE_DRAG: + if (event->y == 0) + { + menubar_remove (menubar); + menubar_drop (menubar, menubar_get_menu_by_x_coord (menubar, event->x)); + } + else if (mouse_on_drop) + menubar_change_selected_item (menubar, event->y); + + was_drag = TRUE; + break; + + case MSG_MOUSE_SCROLL_UP: + case MSG_MOUSE_SCROLL_DOWN: + was_drag = FALSE; + + if (widget_get_state (w, WST_FOCUSED)) + { + if (event->y == 0) + { + /* menubar: left/right */ + if (msg == MSG_MOUSE_SCROLL_UP) + menubar_left (menubar); + else + menubar_right (menubar); + } + else if (mouse_on_drop) + { + /* drop-down menu: up/down */ + if (msg == MSG_MOUSE_SCROLL_UP) + menubar_up (menubar); + else + menubar_down (menubar); + } + } + break; + + default: + was_drag = FALSE; + break; + } +} + +/* --------------------------------------------------------------------------------------------- */ +/*** public functions ****************************************************************************/ +/* --------------------------------------------------------------------------------------------- */ + +menu_entry_t * +menu_entry_create (const char *name, long command) +{ + menu_entry_t *entry; + + entry = g_new (menu_entry_t, 1); + entry->first_letter = ' '; + entry->text = hotkey_new (name); + entry->command = command; + entry->shortcut = NULL; + + return entry; +} + +/* --------------------------------------------------------------------------------------------- */ + +void +menu_entry_free (menu_entry_t * entry) +{ + if (entry != NULL) + { + hotkey_free (entry->text); + g_free (entry->shortcut); + g_free (entry); + } +} + +/* --------------------------------------------------------------------------------------------- */ + +menu_t * +create_menu (const char *name, GList * entries, const char *help_node) +{ + menu_t *menu; + + menu = g_new (menu_t, 1); + menu->start_x = 0; + menu->text = hotkey_new (name); + menu->entries = entries; + menu->max_entry_len = 1; + menu->max_hotkey_len = 0; + menu->selected = 0; + menu->help_node = g_strdup (help_node); + + return menu; +} + +/* --------------------------------------------------------------------------------------------- */ + +void +menu_set_name (menu_t * menu, const char *name) +{ + hotkey_free (menu->text); + menu->text = hotkey_new (name); +} + +/* --------------------------------------------------------------------------------------------- */ + +void +destroy_menu (menu_t * menu) +{ + hotkey_free (menu->text); + g_list_free_full (menu->entries, (GDestroyNotify) menu_entry_free); + g_free (menu->help_node); + g_free (menu); +} + +/* --------------------------------------------------------------------------------------------- */ + +WMenuBar * +menubar_new (GList * menu) +{ + WRect r = { 0, 0, 1, COLS }; + WMenuBar *menubar; + Widget *w; + + menubar = g_new0 (WMenuBar, 1); + w = WIDGET (menubar); + widget_init (w, &r, menubar_callback, menubar_mouse_callback); + w->pos_flags = WPOS_KEEP_HORZ | WPOS_KEEP_TOP; + /* initially, menubar is not selectable */ + widget_set_options (w, WOP_SELECTABLE, FALSE); + w->options |= WOP_TOP_SELECT; + w->keymap = menu_map; + menubar_set_menu (menubar, menu); + + return menubar; +} + +/* --------------------------------------------------------------------------------------------- */ + +void +menubar_set_menu (WMenuBar * menubar, GList * menu) +{ + /* delete previous menu */ + menubar_free_menu (menubar); + /* add new menu */ + menubar->is_dropped = FALSE; + menubar->menu = menu; + menubar->selected = 0; + menubar_arrange (menubar); + widget_set_state (WIDGET (menubar), WST_FOCUSED, FALSE); +} + +/* --------------------------------------------------------------------------------------------- */ + +void +menubar_add_menu (WMenuBar * menubar, menu_t * menu) +{ + if (menu != NULL) + { + menu_arrange (menu, DIALOG (WIDGET (menubar)->owner)->get_shortcut); + menubar->menu = g_list_append (menubar->menu, menu); + } + + menubar_arrange (menubar); +} + +/* --------------------------------------------------------------------------------------------- */ +/** + * Properly space menubar items. Should be called when menubar is created + * and also when widget width is changed (i.e. upon xterm resize). + */ + +void +menubar_arrange (WMenuBar * menubar) +{ + int start_x = 1; + GList *i; + int gap; + + if (menubar->menu == NULL) + return; + + gap = WIDGET (menubar)->rect.cols - 2; + + /* First, calculate gap between items... */ + for (i = menubar->menu; i != NULL; i = g_list_next (i)) + { + menu_t *menu = MENU (i->data); + + /* preserve length here, to be used below */ + menu->start_x = hotkey_width (menu->text) + 2; + gap -= menu->start_x; + } + + if (g_list_next (menubar->menu) == NULL) + gap = 1; + else + gap /= (g_list_length (menubar->menu) - 1); + + if (gap <= 0) + { + /* We are out of luck - window is too narrow... */ + gap = 1; + } + else if (gap >= 3) + gap = 3; + + /* ...and now fix start positions of menubar items */ + for (i = menubar->menu; i != NULL; i = g_list_next (i)) + { + menu_t *menu = MENU (i->data); + int len = menu->start_x; + + menu->start_x = start_x; + start_x += len + gap; + } +} + +/* --------------------------------------------------------------------------------------------- */ +/** Find MenuBar widget in the dialog */ + +WMenuBar * +find_menubar (const WDialog * h) +{ + return MENUBAR (widget_find_by_type (CONST_WIDGET (h), menubar_callback)); +} + +/* --------------------------------------------------------------------------------------------- */ + +/** + * Activate menu bar. + * + * @param menubar menu bar object + * @param dropped whether dropdown menus should be drooped or not + * @which number of active dropdown menu + */ +void +menubar_activate (WMenuBar * menubar, gboolean dropped, int which) +{ + Widget *w = WIDGET (menubar); + + widget_show (w); + + if (!widget_get_state (w, WST_FOCUSED)) + { + widget_set_options (w, WOP_SELECTABLE, TRUE); + + menubar->is_dropped = dropped; + if (which >= 0) + menubar->selected = (guint) which; + + menubar->previous_widget = group_get_current_widget_id (w->owner); + + /* Bring it to the top so it receives all mouse events before any other widget. + * See also comment in menubar_finish(). */ + widget_select (w); + } +} + +/* --------------------------------------------------------------------------------------------- */ |