[PATCH 6/13] kconfig/lxdialog: support resize

From: sam
Date: Sun Oct 01 2006 - 06:56:53 EST

From: Sam Ravnborg <sam@xxxxxxxxxxxxxxxxx>

In all dialogs now properly catch KEY_RESIZE and take proper action.
In mconf try to behave sensibly when a dialog routine returns
-ERRDISPLAYTOOSMALL.

The original check for a screnn size of 80x19 is kept for now.
It may make sense to remove it later, but thats anyway what
much text is adjusted for.

Signed-off-by: Sam Ravnborg <sam@xxxxxxxxxxxx>
---
scripts/kconfig/lxdialog/checklist.c | 11 +++
scripts/kconfig/lxdialog/dialog.h | 8 +-
scripts/kconfig/lxdialog/inputbox.c | 20 ++++-
scripts/kconfig/lxdialog/menubox.c | 25 +++++-
scripts/kconfig/lxdialog/textbox.c | 140 ++++++++++++++++++++--------------
scripts/kconfig/lxdialog/util.c | 6 +
scripts/kconfig/lxdialog/yesno.c | 10 ++
scripts/kconfig/mconf.c | 12 ++-
8 files changed, 161 insertions(+), 71 deletions(-)

diff --git a/scripts/kconfig/lxdialog/checklist.c b/scripts/kconfig/lxdialog/checklist.c
index 39becb7..cf69708 100644
--- a/scripts/kconfig/lxdialog/checklist.c
+++ b/scripts/kconfig/lxdialog/checklist.c
@@ -125,6 +125,12 @@ int dialog_checklist(const char *title,
}
}

+do_resize:
+ if (getmaxy(stdscr) < (height + 6))
+ return -ERRDISPLAYTOOSMALL;
+ if (getmaxx(stdscr) < (width + 6))
+ return -ERRDISPLAYTOOSMALL;
+
max_choice = MIN(list_height, item_count());

/* center dialog box on screen */
@@ -303,6 +309,11 @@ int dialog_checklist(const char *title,
case KEY_ESC:
key = on_key_esc(dialog);
break;
+ case KEY_RESIZE:
+ delwin(list);
+ delwin(dialog);
+ on_key_resize();
+ goto do_resize;
}

/* Now, update everything... */
diff --git a/scripts/kconfig/lxdialog/dialog.h b/scripts/kconfig/lxdialog/dialog.h
index a7cfdec..8dea47f 100644
--- a/scripts/kconfig/lxdialog/dialog.h
+++ b/scripts/kconfig/lxdialog/dialog.h
@@ -86,6 +86,9 @@ #ifndef ACS_DARROW
#define ACS_DARROW 'v'
#endif

+/* error return codes */
+#define ERRDISPLAYTOOSMALL (KEY_MAX + 1)
+
/*
* Color definitions
*/
@@ -181,6 +184,7 @@ #define item_foreach() \

/* generic key handlers */
int on_key_esc(WINDOW *win);
+int on_key_resize(void);

void init_dialog(const char *backtitle);
void reset_dialog(void);
@@ -199,8 +203,8 @@ int dialog_yesno(const char *title, cons
int dialog_msgbox(const char *title, const char *prompt, int height,
int width, int pause);
int dialog_textbox(const char *title, const char *file, int height, int width);
-int dialog_menu(const char *title, const char *prompt, int height, int width,
- int menu_height, const void *selected, int *s_scroll);
+int dialog_menu(const char *title, const char *prompt,
+ const void *selected, int *s_scroll);
int dialog_checklist(const char *title, const char *prompt, int height,
int width, int list_height);
extern char dialog_input_result[];
diff --git a/scripts/kconfig/lxdialog/inputbox.c b/scripts/kconfig/lxdialog/inputbox.c
index edb7975..05e7206 100644
--- a/scripts/kconfig/lxdialog/inputbox.c
+++ b/scripts/kconfig/lxdialog/inputbox.c
@@ -49,6 +49,17 @@ int dialog_inputbox(const char *title, c
char *instr = dialog_input_result;
WINDOW *dialog;

+ if (!init)
+ instr[0] = '\0';
+ else
+ strcpy(instr, init);
+
+do_resize:
+ if (getmaxy(stdscr) <= (height - 2))
+ return -ERRDISPLAYTOOSMALL;
+ if (getmaxx(stdscr) <= (width - 2))
+ return -ERRDISPLAYTOOSMALL;
+
/* center dialog box on screen */
x = (COLS - width) / 2;
y = (LINES - height) / 2;
@@ -86,11 +97,6 @@ int dialog_inputbox(const char *title, c
wmove(dialog, box_y, box_x);
wattrset(dialog, dlg.inputbox.atr);

- if (!init)
- instr[0] = '\0';
- else
- strcpy(instr, init);
-
input_x = strlen(instr);

if (input_x >= box_width) {
@@ -220,6 +226,10 @@ int dialog_inputbox(const char *title, c
case KEY_ESC:
key = on_key_esc(dialog);
break;
+ case KEY_RESIZE:
+ delwin(dialog);
+ on_key_resize();
+ goto do_resize;
}
}

diff --git a/scripts/kconfig/lxdialog/menubox.c b/scripts/kconfig/lxdialog/menubox.c
index d3305ba..fcd95a9 100644
--- a/scripts/kconfig/lxdialog/menubox.c
+++ b/scripts/kconfig/lxdialog/menubox.c
@@ -179,14 +179,25 @@ static void do_scroll(WINDOW *win, int *
/*
* Display a menu for choosing among a number of options
*/
-int dialog_menu(const char *title, const char *prompt, int height, int width,
- int menu_height, const void *selected, int *s_scroll)
+int dialog_menu(const char *title, const char *prompt,
+ const void *selected, int *s_scroll)
{
int i, j, x, y, box_x, box_y;
+ int height, width, menu_height;
int key = 0, button = 0, scroll = 0, choice = 0;
int first_item = 0, max_choice;
WINDOW *dialog, *menu;

+do_resize:
+ height = getmaxy(stdscr);
+ width = getmaxx(stdscr);
+ if (height < 15 || width < 65)
+ return -ERRDISPLAYTOOSMALL;
+
+ height -= 4;
+ width -= 5;
+ menu_height = height - 10;
+
max_choice = MIN(menu_height, item_count());

/* center dialog box on screen */
@@ -226,7 +237,10 @@ int dialog_menu(const char *title, const
draw_box(dialog, box_y, box_x, menu_height + 2, menu_width + 2,
dlg.menubox_border.atr, dlg.menubox.atr);

- item_x = (menu_width - 70) / 2;
+ if (menu_width >= 80)
+ item_x = (menu_width - 70) / 2;
+ else
+ item_x = 4;

/* Set choice to default item */
item_foreach()
@@ -407,6 +421,11 @@ int dialog_menu(const char *title, const
case KEY_ESC:
key = on_key_esc(menu);
break;
+ case KEY_RESIZE:
+ on_key_resize();
+ delwin(menu);
+ delwin(dialog);
+ goto do_resize;
}
}
delwin(menu);
diff --git a/scripts/kconfig/lxdialog/textbox.c b/scripts/kconfig/lxdialog/textbox.c
index a99e1f4..fabfc1a 100644
--- a/scripts/kconfig/lxdialog/textbox.c
+++ b/scripts/kconfig/lxdialog/textbox.c
@@ -25,7 +25,7 @@ static void back_lines(int n);
static void print_page(WINDOW * win, int height, int width);
static void print_line(WINDOW * win, int row, int width);
static char *get_line(void);
-static void print_position(WINDOW * win, int height, int width);
+static void print_position(WINDOW * win);

static int hscroll;
static int begin_reached, end_reached, page_length;
@@ -33,14 +33,28 @@ static const char *buf;
static const char *page;

/*
+ * refresh window content
+ */
+static void refresh_text_box(WINDOW *dialog, WINDOW *box, int boxh, int boxw,
+ int cur_y, int cur_x)
+{
+ print_page(box, boxh, boxw);
+ print_position(dialog);
+ wmove(dialog, cur_y, cur_x); /* Restore cursor position */
+ wrefresh(dialog);
+}
+
+
+/*
* Display text from a file in a dialog box.
*/
-int dialog_textbox(const char *title, const char *tbuf, int height, int width)
+int dialog_textbox(const char *title, const char *tbuf,
+ int initial_height, int initial_width)
{
int i, x, y, cur_x, cur_y, key = 0;
- int texth, textw;
+ int height, width, boxh, boxw;
int passed_end;
- WINDOW *dialog, *text;
+ WINDOW *dialog, *box;

begin_reached = 1;
end_reached = 0;
@@ -49,6 +63,25 @@ int dialog_textbox(const char *title, co
buf = tbuf;
page = buf; /* page is pointer to start of page to be displayed */

+do_resize:
+ getmaxyx(stdscr, height, width);
+ if (height < 8 || width < 8)
+ return -ERRDISPLAYTOOSMALL;
+ if (initial_height != 0)
+ height = initial_height;
+ else
+ if (height > 4)
+ height -= 4;
+ else
+ height = 0;
+ if (initial_width != 0)
+ width = initial_width;
+ else
+ if (width > 5)
+ width -= 5;
+ else
+ width = 0;
+
/* center dialog box on screen */
x = (COLS - width) / 2;
y = (LINES - height) / 2;
@@ -58,14 +91,14 @@ int dialog_textbox(const char *title, co
dialog = newwin(height, width, y, x);
keypad(dialog, TRUE);

- /* Create window for text region, used for scrolling text */
- texth = height - 4;
- textw = width - 2;
- text = subwin(dialog, texth, textw, y + 1, x + 1);
- wattrset(text, dlg.dialog.atr);
- wbkgdset(text, dlg.dialog.atr & A_COLOR);
+ /* Create window for box region, used for scrolling text */
+ boxh = height - 4;
+ boxw = width - 2;
+ box = subwin(dialog, boxh, boxw, y + 1, x + 1);
+ wattrset(box, dlg.dialog.atr);
+ wbkgdset(box, dlg.dialog.atr & A_COLOR);

- keypad(text, TRUE);
+ keypad(box, TRUE);

/* register the new window, along with its borders */
draw_box(dialog, 0, 0, height, width,
@@ -86,11 +119,8 @@ int dialog_textbox(const char *title, co
getyx(dialog, cur_y, cur_x); /* Save cursor position */

/* Print first page of text */
- attr_clear(text, texth, textw, dlg.dialog.atr);
- print_page(text, texth, textw);
- print_position(dialog, height, width);
- wmove(dialog, cur_y, cur_x); /* Restore cursor position */
- wrefresh(dialog);
+ attr_clear(box, boxh, boxw, dlg.dialog.atr);
+ refresh_text_box(dialog, box, boxh, boxw, cur_y, cur_x);

while ((key != KEY_ESC) && (key != '\n')) {
key = wgetch(dialog);
@@ -99,7 +129,7 @@ int dialog_textbox(const char *title, co
case 'e':
case 'X':
case 'x':
- delwin(text);
+ delwin(box);
delwin(dialog);
return 0;
case 'g': /* First page */
@@ -107,10 +137,8 @@ int dialog_textbox(const char *title, co
if (!begin_reached) {
begin_reached = 1;
page = buf;
- print_page(text, texth, textw);
- print_position(dialog, height, width);
- wmove(dialog, cur_y, cur_x); /* Restore cursor position */
- wrefresh(dialog);
+ refresh_text_box(dialog, box, boxh, boxw,
+ cur_y, cur_x);
}
break;
case 'G': /* Last page */
@@ -119,11 +147,9 @@ int dialog_textbox(const char *title, co
end_reached = 1;
/* point to last char in buf */
page = buf + strlen(buf);
- back_lines(texth);
- print_page(text, texth, textw);
- print_position(dialog, height, width);
- wmove(dialog, cur_y, cur_x); /* Restore cursor position */
- wrefresh(dialog);
+ back_lines(boxh);
+ refresh_text_box(dialog, box, boxh, boxw,
+ cur_y, cur_x);
break;
case 'K': /* Previous line */
case 'k':
@@ -138,16 +164,16 @@ int dialog_textbox(const char *title, co
* point to start of next page. This is done
* by calling get_line() in the following
* 'for' loop. */
- scrollok(text, TRUE);
- wscrl(text, -1); /* Scroll text region down one line */
- scrollok(text, FALSE);
+ scrollok(box, TRUE);
+ wscrl(box, -1); /* Scroll box region down one line */
+ scrollok(box, FALSE);
page_length = 0;
passed_end = 0;
- for (i = 0; i < texth; i++) {
+ for (i = 0; i < boxh; i++) {
if (!i) {
/* print first line of page */
- print_line(text, 0, textw);
- wnoutrefresh(text);
+ print_line(box, 0, boxw);
+ wnoutrefresh(box);
} else
/* Called to update 'end_reached' and 'page' */
get_line();
@@ -157,7 +183,7 @@ int dialog_textbox(const char *title, co
passed_end = 1;
}

- print_position(dialog, height, width);
+ print_position(dialog);
wmove(dialog, cur_y, cur_x); /* Restore cursor position */
wrefresh(dialog);
}
@@ -167,23 +193,21 @@ int dialog_textbox(const char *title, co
case KEY_PPAGE:
if (begin_reached)
break;
- back_lines(page_length + texth);
- print_page(text, texth, textw);
- print_position(dialog, height, width);
- wmove(dialog, cur_y, cur_x);
- wrefresh(dialog);
+ back_lines(page_length + boxh);
+ refresh_text_box(dialog, box, boxh, boxw,
+ cur_y, cur_x);
break;
case 'J': /* Next line */
case 'j':
case KEY_DOWN:
if (!end_reached) {
begin_reached = 0;
- scrollok(text, TRUE);
- scroll(text); /* Scroll text region up one line */
- scrollok(text, FALSE);
- print_line(text, texth - 1, textw);
- wnoutrefresh(text);
- print_position(dialog, height, width);
+ scrollok(box, TRUE);
+ scroll(box); /* Scroll box region up one line */
+ scrollok(box, FALSE);
+ print_line(box, boxh - 1, boxw);
+ wnoutrefresh(box);
+ print_position(dialog);
wmove(dialog, cur_y, cur_x); /* Restore cursor position */
wrefresh(dialog);
}
@@ -194,10 +218,8 @@ int dialog_textbox(const char *title, co
break;

begin_reached = 0;
- print_page(text, texth, textw);
- print_position(dialog, height, width);
- wmove(dialog, cur_y, cur_x);
- wrefresh(dialog);
+ refresh_text_box(dialog, box, boxh, boxw,
+ cur_y, cur_x);
break;
case '0': /* Beginning of line */
case 'H': /* Scroll left */
@@ -212,9 +234,8 @@ int dialog_textbox(const char *title, co
hscroll--;
/* Reprint current page to scroll horizontally */
back_lines(page_length);
- print_page(text, texth, textw);
- wmove(dialog, cur_y, cur_x);
- wrefresh(dialog);
+ refresh_text_box(dialog, box, boxh, boxw,
+ cur_y, cur_x);
break;
case 'L': /* Scroll right */
case 'l':
@@ -224,16 +245,21 @@ int dialog_textbox(const char *title, co
hscroll++;
/* Reprint current page to scroll horizontally */
back_lines(page_length);
- print_page(text, texth, textw);
- wmove(dialog, cur_y, cur_x);
- wrefresh(dialog);
+ refresh_text_box(dialog, box, boxh, boxw,
+ cur_y, cur_x);
break;
case KEY_ESC:
key = on_key_esc(dialog);
break;
+ case KEY_RESIZE:
+ back_lines(height);
+ delwin(box);
+ delwin(dialog);
+ on_key_resize();
+ goto do_resize;
}
}
- delwin(text);
+ delwin(box);
delwin(dialog);
return key; /* ESC pressed */
}
@@ -353,13 +379,13 @@ static char *get_line(void)
/*
* Print current position
*/
-static void print_position(WINDOW * win, int height, int width)
+static void print_position(WINDOW * win)
{
int percent;

wattrset(win, dlg.position_indicator.atr);
wbkgdset(win, dlg.position_indicator.atr & A_COLOR);
percent = (page - buf) * 100 / strlen(buf);
- wmove(win, height - 3, width - 9);
+ wmove(win, getmaxy(win) - 3, getmaxx(win) - 9);
wprintw(win, "(%3d%%)", percent);
}
diff --git a/scripts/kconfig/lxdialog/util.c b/scripts/kconfig/lxdialog/util.c
index cb21dc4..ebc781b 100644
--- a/scripts/kconfig/lxdialog/util.c
+++ b/scripts/kconfig/lxdialog/util.c
@@ -509,6 +509,12 @@ int on_key_esc(WINDOW *win)
return -1;
}

+/* redraw screen in new size */
+int on_key_resize(void)
+{
+ dialog_clear();
+ return KEY_RESIZE;
+}

struct dialog_list *item_cur;
struct dialog_list item_nil;
diff --git a/scripts/kconfig/lxdialog/yesno.c b/scripts/kconfig/lxdialog/yesno.c
index 8364f9d..ee0a04e 100644
--- a/scripts/kconfig/lxdialog/yesno.c
+++ b/scripts/kconfig/lxdialog/yesno.c
@@ -44,6 +44,12 @@ int dialog_yesno(const char *title, cons
int i, x, y, key = 0, button = 0;
WINDOW *dialog;

+do_resize:
+ if (getmaxy(stdscr) < (height + 4))
+ return -ERRDISPLAYTOOSMALL;
+ if (getmaxx(stdscr) < (width + 4))
+ return -ERRDISPLAYTOOSMALL;
+
/* center dialog box on screen */
x = (COLS - width) / 2;
y = (LINES - height) / 2;
@@ -96,6 +102,10 @@ int dialog_yesno(const char *title, cons
case KEY_ESC:
key = on_key_esc(dialog);
break;
+ case KEY_RESIZE:
+ delwin(dialog);
+ on_key_resize();
+ goto do_resize;
}
}

diff --git a/scripts/kconfig/mconf.c b/scripts/kconfig/mconf.c
index ef75d6c..f7abca4 100644
--- a/scripts/kconfig/mconf.c
+++ b/scripts/kconfig/mconf.c
@@ -606,9 +606,8 @@ static void conf(struct menu *menu)
reset_dialog();
res = dialog_menu(prompt ? prompt : _("Main Menu"),
_(menu_instructions),
- rows, cols, rows - 10,
active_menu, &s_scroll);
- if (res == 1 || res == KEY_ESC)
+ if (res == 1 || res == KEY_ESC || res == -ERRDISPLAYTOOSMALL)
break;
if (!item_activate_selected())
continue;
@@ -617,7 +616,10 @@ static void conf(struct menu *menu)

submenu = item_data();
active_menu = item_data();
- sym = submenu->sym;
+ if (submenu)
+ sym = submenu->sym;
+ else
+ sym = NULL;

switch (res) {
case 0:
@@ -683,7 +685,7 @@ static void conf(struct menu *menu)
static void show_textbox(const char *title, const char *text, int r, int c)
{
reset_dialog();
- dialog_textbox(title, text, r ? r : rows, c ? c : cols);
+ dialog_textbox(title, text, r, c);
}

static void show_helptext(const char *title, const char *text)
@@ -756,6 +758,8 @@ static void conf_choice(struct menu *men
break;
case KEY_ESC:
return;
+ case -ERRDISPLAYTOOSMALL:
+ return;
}
}
}
--
1.4.1

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