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rockbox/apps/menu.c
Jens Arnold 1a4083d828 Adjust menu scrollbar height to the actual text height. Idea taken from patch #1306243 by Stephan Wezel. 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7598 a1c6a512-1295-4272-9138-f99709370657
2005-10-08 07:38:44 +00:00

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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2002 Robert E. Hak
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include <stdbool.h>
#include <stdlib.h>
#include "hwcompat.h"
#include "lcd.h"
#include "font.h"
#include "backlight.h"
#include "menu.h"
#include "button.h"
#include "kernel.h"
#include "debug.h"
#include "usb.h"
#include "panic.h"
#include "settings.h"
#include "status.h"
#include "screens.h"
#include "talk.h"
#include "lang.h"
#include "misc.h"
#ifdef HAVE_LCD_BITMAP
#include "icons.h"
#include "widgets.h"
#endif
struct menu {
int top;
int cursor;
struct menu_item* items;
int itemcount;
int (*callback)(int, int);
#if defined(HAVE_LCD_BITMAP) && (CONFIG_KEYPAD == RECORDER_PAD)
bool use_buttonbar; /* true if a buttonbar is defined */
const char *buttonbar[3];
#endif
};
#define MAX_MENUS 5
#ifdef HAVE_LCD_BITMAP
/* pixel margins */
#define MARGIN_X (global_settings.scrollbar && \
menu_lines < menus[m].itemcount ? SCROLLBAR_WIDTH : 0) +\
CURSOR_WIDTH
#define MARGIN_Y (global_settings.statusbar ? STATUSBAR_HEIGHT : 0)
/* position the entry-list starts at */
#define LINE_X 0
#define LINE_Y (global_settings.statusbar ? 1 : 0)
#define CURSOR_X (global_settings.scrollbar && \
menu_lines < menus[m].itemcount ? 1 : 0)
#define CURSOR_Y 0 /* the cursor is not positioned in regard to
the margins, so this is the amount of lines
we add to the cursor Y position to position
it on a line */
#define CURSOR_WIDTH (global_settings.invert_cursor ? 0 : 4)
#define SCROLLBAR_X 0
#define SCROLLBAR_Y lcd_getymargin()
#define SCROLLBAR_WIDTH 6
#else /* HAVE_LCD_BITMAP */
#define LINE_X 1 /* X position the entry-list starts at */
#define MENU_LINES 2
#define CURSOR_X 0
#define CURSOR_Y 0 /* not really used for players */
#endif /* HAVE_LCD_BITMAP */
#define CURSOR_CHAR 0x92
static struct menu menus[MAX_MENUS];
static bool inuse[MAX_MENUS] = { false };
/* count in letter positions, NOT pixels */
void put_cursorxy(int x, int y, bool on)
{
#ifdef HAVE_LCD_BITMAP
int fh, fw;
int xpos, ypos;
/* check here instead of at every call (ugly, but cheap) */
if (global_settings.invert_cursor)
return;
lcd_getstringsize("A", &fw, &fh);
xpos = x*6;
ypos = y*fh + lcd_getymargin();
if ( fh > 8 )
ypos += (fh - 8) / 2;
#endif
/* place the cursor */
if(on) {
#ifdef HAVE_LCD_BITMAP
lcd_mono_bitmap(bitmap_icons_6x8[Icon_Cursor], xpos, ypos, 4, 8);
#else
lcd_putc(x, y, CURSOR_CHAR);
#endif
}
else {
#if defined(HAVE_LCD_BITMAP)
/* I use xy here since it needs to disregard the margins */
lcd_set_drawmode(DRMODE_SOLID|DRMODE_INVERSEVID);
lcd_fillrect (xpos, ypos, 4, 8);
lcd_set_drawmode(DRMODE_SOLID);
#else
lcd_putc(x, y, ' ');
#endif
}
}
void menu_draw(int m)
{
int i = 0;
#ifdef HAVE_LCD_BITMAP
int fw, fh;
int menu_lines;
int height = LCD_HEIGHT;
lcd_setfont(FONT_UI);
lcd_getstringsize("A", &fw, &fh);
if (global_settings.statusbar)
height -= STATUSBAR_HEIGHT;
#if CONFIG_KEYPAD == RECORDER_PAD
if(global_settings.buttonbar && menus[m].use_buttonbar) {
buttonbar_set(menus[m].buttonbar[0],
menus[m].buttonbar[1],
menus[m].buttonbar[2]);
height -= BUTTONBAR_HEIGHT;
}
#endif
menu_lines = height / fh;
height = menu_lines * fh;
#else
int menu_lines = MENU_LINES;
#endif
lcd_clear_display();
#ifdef HAVE_LCD_BITMAP
lcd_setmargins(MARGIN_X,MARGIN_Y); /* leave room for cursor and icon */
#endif
/* Adjust cursor pos if it's below the screen */
if (menus[m].cursor - menus[m].top >= menu_lines)
menus[m].top = menus[m].cursor - (menu_lines - 1);
/* Adjust cursor pos if it's above the screen */
if(menus[m].cursor < menus[m].top)
menus[m].top = menus[m].cursor;
for (i = menus[m].top;
(i < menus[m].itemcount) && (i<menus[m].top+menu_lines);
i++) {
/* We want to scroll the line where the cursor is */
if((menus[m].cursor - menus[m].top)==(i-menus[m].top))
#ifdef HAVE_LCD_BITMAP
if (global_settings.invert_cursor)
lcd_puts_scroll_style(LINE_X, i-menus[m].top,
P2STR(menus[m].items[i].desc), STYLE_INVERT);
else
#endif
lcd_puts_scroll(LINE_X, i-menus[m].top, P2STR(menus[m].items[i].desc));
else
lcd_puts(LINE_X, i-menus[m].top, P2STR(menus[m].items[i].desc));
}
/* place the cursor */
put_cursorxy(CURSOR_X, menus[m].cursor - menus[m].top, true);
#ifdef HAVE_LCD_BITMAP
if (global_settings.scrollbar && menus[m].itemcount > menu_lines)
scrollbar(SCROLLBAR_X, SCROLLBAR_Y, SCROLLBAR_WIDTH - 1,
height, menus[m].itemcount, menus[m].top,
menus[m].top + menu_lines, VERTICAL);
#if CONFIG_KEYPAD == RECORDER_PAD
if(global_settings.buttonbar && menus[m].use_buttonbar)
buttonbar_draw();
#endif /* CONFIG_KEYPAD == RECORDER_PAD */
#endif /* HAVE_LCD_BITMAP */
status_draw(true);
lcd_update();
}
/*
* Move the cursor to a particular id,
* target: where you want it to be
*/
static void put_cursor(int m, int target)
{
int voice_id;
menus[m].cursor = target;
menu_draw(m);
/* "say" the entry under the cursor */
if(global_settings.talk_menu)
{
voice_id = P2ID(menus[m].items[menus[m].cursor].desc);
if (voice_id >= 0) /* valid ID given? */
talk_id(voice_id, false); /* say it */
}
}
int menu_init(const struct menu_item* mitems, int count, int (*callback)(int, int),
const char *button1, const char *button2, const char *button3)
{
int i;
for ( i=0; i<MAX_MENUS; i++ ) {
if ( !inuse[i] ) {
inuse[i] = true;
break;
}
}
if ( i == MAX_MENUS ) {
DEBUGF("Out of menus!\n");
return -1;
}
menus[i].items = (struct menu_item*)mitems; /* de-const */
menus[i].itemcount = count;
menus[i].top = 0;
menus[i].cursor = 0;
menus[i].callback = callback;
#if defined(HAVE_LCD_BITMAP) && (CONFIG_KEYPAD == RECORDER_PAD)
menus[i].buttonbar[0] = button1;
menus[i].buttonbar[1] = button2;
menus[i].buttonbar[2] = button3;
if(button1 || button2 || button3)
menus[i].use_buttonbar = true;
else
menus[i].use_buttonbar = false;
#else
(void)button1;
(void)button2;
(void)button3;
#endif
return i;
}
void menu_exit(int m)
{
inuse[m] = false;
}
int menu_show(int m)
{
bool exit = false;
int key;
#ifdef HAVE_LCD_BITMAP
int fw, fh;
int menu_lines;
int height = LCD_HEIGHT;
lcd_setfont(FONT_UI);
lcd_getstringsize("A", &fw, &fh);
if (global_settings.statusbar)
height -= STATUSBAR_HEIGHT;
#if CONFIG_KEYPAD == RECORDER_PAD
if(global_settings.buttonbar && menus[m].use_buttonbar) {
buttonbar_set(menus[m].buttonbar[0],
menus[m].buttonbar[1],
menus[m].buttonbar[2]);
height -= BUTTONBAR_HEIGHT;
}
#endif
menu_lines = height / fh;
#else
int menu_lines = MENU_LINES;
#endif
/* Put the cursor on the first line and draw the menu */
put_cursor(m, menus[m].cursor);
while (!exit) {
key = button_get_w_tmo(HZ/2);
/*
* "short-circuit" the default keypresses by running the
* callback function
* The callback may return a new key value, often this will be
* BUTTON_NONE or the same key value, but it's perfectly legal
* to "simulate" key presses by returning another value.
*/
if( menus[m].callback != NULL )
key = menus[m].callback(key, m);
switch( key ) {
case MENU_PREV:
case MENU_PREV | BUTTON_REPEAT:
#ifdef MENU_RC_PREV
case MENU_RC_PREV:
case MENU_RC_PREV | BUTTON_REPEAT:
#endif
if (menus[m].cursor) {
/* keep the cursor at 1/3 of the screen */
if (menus[m].top && menus[m].cursor - menus[m].top <
menu_lines - (2 * menu_lines) / 3)
menus[m].top--;
/* move up */
put_cursor(m, menus[m].cursor-1);
}
else {
/* move to bottom */
menus[m].top = menus[m].itemcount-(menu_lines+1);
if (menus[m].top < 0)
menus[m].top = 0;
put_cursor(m, menus[m].itemcount-1);
}
break;
case MENU_NEXT:
case MENU_NEXT | BUTTON_REPEAT:
#ifdef MENU_RC_NEXT
case MENU_RC_NEXT:
case MENU_RC_NEXT | BUTTON_REPEAT:
#endif
if (menus[m].cursor < menus[m].itemcount-1) {
/* keep the cursor at 2/3 of the screen */
if (menus[m].itemcount - menus[m].top > menu_lines &&
menus[m].cursor - menus[m].top >= (2 * menu_lines) / 3)
menus[m].top++;
/* move down */
put_cursor(m, menus[m].cursor+1);
}
else {
/* move to top */
menus[m].top = 0;
menus[m].cursor = 0;
put_cursor(m, 0);
}
break;
case MENU_ENTER:
#ifdef MENU_ENTER2
case MENU_ENTER2:
#endif
#ifdef MENU_RC_ENTER
case MENU_RC_ENTER:
#endif
/* Erase current display state */
lcd_clear_display();
return menus[m].cursor;
case MENU_EXIT:
#ifdef MENU_EXIT2
case MENU_EXIT2:
#endif
#ifdef MENU_EXIT_MENU
case MENU_EXIT_MENU:
#endif
#ifdef MENU_RC_EXIT
case MENU_RC_EXIT:
#endif
lcd_stop_scroll();
exit = true;
break;
default:
if(default_event_handler(key) == SYS_USB_CONNECTED)
return MENU_ATTACHED_USB;
break;
}
status_draw(false);
}
return MENU_SELECTED_EXIT;
}
bool menu_run(int m)
{
while (1) {
switch (menu_show(m))
{
case MENU_SELECTED_EXIT:
return false;
case MENU_ATTACHED_USB:
return true;
default:
if ((menus[m].items[menus[m].cursor].function) &&
(menus[m].items[menus[m].cursor].function()))
return true;
}
}
return false;
}
/*
* Property function - return the current cursor for "menu"
*/
int menu_cursor(int menu)
{
return menus[menu].cursor;
}
/*
* Property function - return the "menu" description at "position"
*/
char* menu_description(int menu, int position)
{
return P2STR(menus[menu].items[position].desc);
}
/*
* Delete the element "position" from the menu items in "menu"
*/
void menu_delete(int menu, int position)
{
int i;
/* copy the menu item from the one below */
for( i = position; i < (menus[menu].itemcount - 1); i++)
menus[menu].items[i] = menus[menu].items[i + 1];
/* reduce the count */
menus[menu].itemcount--;
/* adjust if this was the last menu item and the cursor was on it */
if(menus[menu].itemcount && menus[menu].itemcount <= menus[menu].cursor)
menus[menu].cursor = menus[menu].itemcount - 1;
}
void menu_insert(int menu, int position, char *desc, bool (*function) (void))
{
int i;
if(position < 0)
position = menus[menu].itemcount;
/* Move the items below one position forward */
for( i = menus[menu].itemcount; i > position; i--)
menus[menu].items[i] = menus[menu].items[i - 1];
/* Increase the count */
menus[menu].itemcount++;
/* Update the current item */
menus[menu].items[position].desc = desc;
menus[menu].items[position].function = function;
}
/*
* Property function - return the "count" of menu items in "menu"
*/
int menu_count(int menu)
{
return menus[menu].itemcount;
}
/*
* Allows a menu item at the current cursor position in "menu" to be moved up the list
*/
bool menu_moveup(int menu)
{
struct menu_item swap;
/* can't be the first item ! */
if( menus[menu].cursor == 0)
return false;
/* use a temporary variable to do the swap */
swap = menus[menu].items[menus[menu].cursor - 1];
menus[menu].items[menus[menu].cursor - 1] = menus[menu].items[menus[menu].cursor];
menus[menu].items[menus[menu].cursor] = swap;
menus[menu].cursor--;
return true;
}
/*
* Allows a menu item at the current cursor position in "menu" to be moved down the list
*/
bool menu_movedown(int menu)
{
struct menu_item swap;
/* can't be the last item ! */
if( menus[menu].cursor == menus[menu].itemcount - 1)
return false;
/* use a temporary variable to do the swap */
swap = menus[menu].items[menus[menu].cursor + 1];
menus[menu].items[menus[menu].cursor + 1] = menus[menu].items[menus[menu].cursor];
menus[menu].items[menus[menu].cursor] = swap;
menus[menu].cursor++;
return true;
}
/*
* Allows to set the cursor position. Doesn't redraw by itself.
*/
void menu_set_cursor(int menu, int position)
{
menus[menu].cursor = position;
}
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