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rockbox/apps/plugins/pdbox/pdbox-gui.c
Wincent Balin bec80ca7dd PDBox: Added GUI. 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@22147 a1c6a512-1295-4272-9138-f99709370657
2009-08-04 02:01:55 +00:00

809 lines
24 KiB
C
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2009 Wincent Balin
*
* This program 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 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "plugin.h"
#include "pdbox.h"
#include "lib/xlcd.h"
/* Declare back- and foreground colors. */
#define BGCOLOR (LCD_BLACK)
#define FGCOLOR (LCD_WHITE)
/* Button colors. */
#define BTNCOLOR_DARK (LCD_DARKGRAY)
#define BTNCOLOR_LIGHT (LCD_LIGHTGRAY)
/* Variables in the main code. */
extern char* filename;
extern bool quit;
/* Screen multiplier. */
static float screen_multiplier;
/* Displacement of the slanted corner in the contour of the number widget. */
static int number_corner;
/* Button flags. */
static bool play_on;
static bool previous_on;
static bool next_on;
static bool menu_on;
static bool action_on;
/* Pause flag. */
static bool paused;
/* Draw circle using midpoint circle algorithm.
Adapted from http://en.wikipedia.org/wiki/Midpoint_circle_algorithm. */
void drawcircle(int x, int y, int r)
{
int f = 1 - r;
int ddfx = 1;
int ddfy = -2 * r;
int xp = 0;
int yp = r;
/* Draw outer points. */
rb->lcd_drawpixel(x, y + r);
rb->lcd_drawpixel(x, y + r);
rb->lcd_drawpixel(x + r, y);
rb->lcd_drawpixel(x - r, y);
/* Calculate coordinates of points in one octant. */
while(xp < yp)
{
/* ddfx == 2 * xp + 1;
ddfy == -2 * yp;
f == xp*xp + yp*yp - r*r + 2*xp - yp + 1; */
if(f >= 0)
{
yp--;
ddfy += 2;
f += ddfy;
}
xp++;
ddfx += 2;
f += ddfx;
/* Draw pixels in all octants. */
rb->lcd_drawpixel(x + xp, y + yp);
rb->lcd_drawpixel(x + xp, y - yp);
rb->lcd_drawpixel(x - xp, y + yp);
rb->lcd_drawpixel(x - xp, y - yp);
rb->lcd_drawpixel(x + yp, y + xp);
rb->lcd_drawpixel(x + yp, y - xp);
rb->lcd_drawpixel(x - yp, y + xp);
rb->lcd_drawpixel(x - yp, y - xp);
}
}
/* Fill circle. */
void fillcircle(int x, int y, int r)
{
int f = 1 - r;
int ddfx = 1;
int ddfy = -2 * r;
int xp = 0;
int yp = r;
/* Draw outer points. */
rb->lcd_drawpixel(x, y + r);
rb->lcd_drawpixel(x, y + r);
rb->lcd_drawpixel(x + r, y);
rb->lcd_drawpixel(x - r, y);
/* Calculate coordinates of points in one octant. */
while(xp < yp)
{
/* ddfx == 2 * xp + 1;
ddfy == -2 * yp;
f == xp*xp + yp*yp - r*r + 2*xp - yp + 1; */
if(f >= 0)
{
yp--;
ddfy += 2;
f += ddfy;
}
xp++;
ddfx += 2;
f += ddfx;
/* Fill circle with horizontal lines. */
rb->lcd_hline(x - xp, x + xp, y - yp);
rb->lcd_hline(x - xp, x + xp, y + yp);
rb->lcd_hline(x - yp, x + yp, y - xp);
rb->lcd_hline(x - yp, x + yp, y + xp);
}
/* Draw last horizontal line (central one). */
rb->lcd_hline(x - r, x + r, y);
}
/* Initialize GUI. */
void pd_gui_init(void)
{
/* Reset button flags. */
play_on = false;
previous_on = false;
next_on = false;
menu_on = false;
action_on = false;
/* Unpause Pure Data. */
paused = false;
/* Calculate dimension factors. */
screen_multiplier = ((float) LCD_WIDTH) / 160.0f;
number_corner = 5 * screen_multiplier;
/* Set back- and foreground color. */
rb->lcd_set_background(BGCOLOR);
rb->lcd_set_foreground(FGCOLOR);
/* Clear background. */
rb->lcd_clear_display();
/* Update display. */
rb->lcd_update();
}
/* Load PD patch. */
unsigned int pd_gui_load_patch(struct pd_widget* wg, unsigned int max_widgets)
{
int fd;
char line[100];
char* saveptr;
unsigned int widgets = 0;
/* Open PD patch. */
fd = open(filename, O_RDONLY);
/* Check for I/O error. */
if(!fd)
{
/* Show error message and make plug-in quit. */
rb->splash(HZ, "Error opening .pd file!");
quit = true;
return 0;
}
/* Read lines from PD file. */
while(rb->read_line(fd, line, sizeof(line)) > 0)
{
/* Check whether we got too many widgets. */
if(widgets >= max_widgets)
{
rb->splash(HZ, "Too many widgets!");
quit = true;
return 0;
}
/* Search for key strings in the line. */
if((strstr(line, "floatatom") != NULL) &&
(strstr(line, "pod_") != NULL))
{
wg->id = PD_NUMBER;
strtok_r(line, " ", &saveptr);
strtok_r(NULL, " ", &saveptr);
wg->x = atoi(strtok_r(NULL, " ", &saveptr)) * screen_multiplier;
wg->y = atoi(strtok_r(NULL, " ", &saveptr)) * screen_multiplier;
wg->w = 7 * atoi(strtok_r(NULL, " ", &saveptr)) *
screen_multiplier;
wg->h = 16 * screen_multiplier;
strtok_r(NULL, " ", &saveptr);
strtok_r(NULL, " ", &saveptr);
strtok_r(NULL, " ", &saveptr);
strtok_r(NULL, " ", &saveptr);
strncpy(wg->name, strtok_r(NULL, " ", &saveptr), sizeof(wg->name));
/* We got one more widget. */
wg++;
widgets++;
}
else if((strstr(line, "symbolatom") != NULL) &&
(strstr(line, "pod_") != NULL))
{
wg->id = PD_SYMBOL;
strtok_r(line, " ", &saveptr);
strtok_r(NULL, " ", &saveptr);
wg->x = atoi(strtok_r(NULL, " ", &saveptr)) * screen_multiplier;
wg->y = atoi(strtok_r(NULL, " ", &saveptr)) * screen_multiplier;
wg->w = 7 * atoi(strtok_r(NULL, " ", &saveptr)) *
screen_multiplier;
wg->h = 16 * screen_multiplier;
strtok_r(NULL, " ", &saveptr);
strtok_r(NULL, " ", &saveptr);
strtok_r(NULL, " ", &saveptr);
strtok_r(NULL, " ", &saveptr);
strncpy(wg->name, strtok_r(NULL, " ", &saveptr), sizeof(wg->name));
/* We got one more widget. */
wg++;
widgets++;
}
else if((strstr(line, "vsl") != NULL) &&
(strstr(line, "pod_") != NULL))
{
wg->id = PD_VSLIDER;
strtok_r(line, " ", &saveptr);
strtok_r(NULL, " ", &saveptr);
wg->x = atoi(strtok_r(NULL, " ", &saveptr)) * screen_multiplier;
wg->y = atoi(strtok_r(NULL, " ", &saveptr)) * screen_multiplier;
strtok_r(NULL, " ", &saveptr);
wg->w = atoi(strtok_r(NULL, " ", &saveptr)) * screen_multiplier;
wg->h = atoi(strtok_r(NULL, " ", &saveptr)) * screen_multiplier;
wg->min = atoi(strtok_r(NULL, " ", &saveptr));
wg->max = atoi(strtok_r(NULL, " ", &saveptr));
strtok_r(NULL, " ", &saveptr);
strtok_r(NULL, " ", &saveptr);
strtok_r(NULL, " ", &saveptr);
strncpy(wg->name, strtok_r(NULL, " ", &saveptr), sizeof(wg->name));
/* We got one more widget. */
wg++;
widgets++;
}
else if((strstr(line, "hsl") != NULL) &&
(strstr(line, "pod_") != NULL))
{
wg->id = PD_HSLIDER;
strtok_r(line, " ", &saveptr);
strtok_r(NULL, " ", &saveptr);
wg->x = atoi(strtok_r(NULL, " ", &saveptr)) * screen_multiplier;
wg->y = atoi(strtok_r(NULL, " ", &saveptr)) * screen_multiplier;
strtok_r(NULL, " ", &saveptr);
wg->w = atoi(strtok_r(NULL, " ", &saveptr)) * screen_multiplier;
wg->h = atoi(strtok_r(NULL, " ", &saveptr)) * screen_multiplier;
wg->min = atoi(strtok_r(NULL, " ", &saveptr));
wg->max = atoi(strtok_r(NULL, " ", &saveptr));
strtok_r(NULL, " ", &saveptr);
strtok_r(NULL, " ", &saveptr);
strtok_r(NULL, " ", &saveptr);
strncpy(wg->name, strtok_r(NULL, " ", &saveptr), sizeof(wg->name));
/* We got one more widget. */
wg++;
widgets++;
}
else if((strstr(line, "vradio") != NULL) &&
(strstr(line, "pod_") != NULL))
{
wg->id = PD_VRADIO;
strtok_r(line, " ", &saveptr);
strtok_r(NULL, " ", &saveptr);
wg->x = atoi(strtok_r(NULL, " ", &saveptr)) * screen_multiplier;
wg->y = atoi(strtok_r(NULL, " ", &saveptr)) * screen_multiplier;
strtok_r(NULL, " ", &saveptr);
wg->w = atoi(strtok_r(NULL, " ", &saveptr)) * screen_multiplier;
strtok_r(NULL, " ", &saveptr);
strtok_r(NULL, " ", &saveptr);
wg->min = 0;
wg->max = atoi(strtok_r(NULL, " ", &saveptr));
wg->h = wg->w * wg->max;
strtok_r(NULL, " ", &saveptr);
strncpy(wg->name, strtok_r(NULL, " ", &saveptr), sizeof(wg->name));
wg->max--;
/* We got one more widget. */
wg++;
widgets++;
}
else if((strstr(line, "hradio") != NULL) &&
(strstr(line, "pod_") != NULL))
{
wg->id = PD_HRADIO;
strtok_r(line, " ", &saveptr);
strtok_r(NULL, " ", &saveptr);
wg->x = atoi(strtok_r(NULL, " ", &saveptr)) * screen_multiplier;
wg->y = atoi(strtok_r(NULL, " ", &saveptr)) * screen_multiplier;
strtok_r(NULL, " ", &saveptr);
wg->h = atoi(strtok_r(NULL, " ", &saveptr)) * screen_multiplier;
strtok_r(NULL, " ", &saveptr);
strtok_r(NULL, " ", &saveptr);
wg->min = 0;
wg->max = atoi(strtok_r(NULL, " ", &saveptr));
wg->w = wg->h * wg->max;
strtok_r(NULL, " ", &saveptr);
strncpy(wg->name, strtok_r(NULL, " ", &saveptr), sizeof(wg->name));
wg->max--;
/* We got one more widget. */
wg++;
widgets++;
}
else if((strstr(line, "bng") != NULL) &&
(strstr(line, "pod_") != NULL))
{
wg->id = PD_BANG;
strtok_r(line, " ", &saveptr);
strtok_r(NULL, " ", &saveptr);
wg->x = atoi(strtok_r(NULL, " ", &saveptr)) * screen_multiplier;
wg->y = atoi(strtok_r(NULL, " ", &saveptr)) * screen_multiplier;
strtok_r(NULL, " ", &saveptr);
wg->w = atoi(strtok_r(NULL, " ", &saveptr)) * screen_multiplier;
wg->h = wg->w;
strtok_r(NULL, " ", &saveptr);
strtok_r(NULL, " ", &saveptr);
strtok_r(NULL, " ", &saveptr);
strtok_r(NULL, " ", &saveptr);
strncpy(wg->name, strtok_r(NULL, " ", &saveptr), sizeof(wg->name));
wg->min = 0;
wg->max = 1;
/* Clear timeout flag. */
wg->timeout = 0;
/* We got one more widget. */
wg++;
widgets++;
}
else if(strstr(line, "text") != NULL)
{
wg->id = PD_TEXT;
strtok_r(line, " ", &saveptr);
strtok_r(NULL, " ", &saveptr);
wg->x = atoi(strtok_r(NULL, " ", &saveptr)) * screen_multiplier;
wg->y = atoi(strtok_r(NULL, " ", &saveptr)) * screen_multiplier;
strncpy(wg->name, strtok_r(NULL, " ", &saveptr), sizeof(wg->name));
char* w = strtok_r(NULL, " ", &saveptr);
while(w != NULL)
{
strcat(wg->name, w);
strcat(wg->name, " ");
w = strtok_r(NULL, " ", &saveptr);
}
/* Cut off unneeded characters (';' and '\n'). */
int namelen = strlen(wg->name);
if(namelen > 1)
{
/* Cut off '\n'. */
wg->name[namelen-1] = '\0';
namelen--;
/* Cut the last semi-colon, if there is one. */
if(wg->name[namelen-1] == ';')
wg->name[namelen-1] = '\0';
}
/* We got one more widget. */
wg++;
widgets++;
}
}
/* Close PD patch. */
close(fd);
/* Return amount of loaded widgets. */
return widgets;
}
/* Draw standard user interface. */
void pd_gui_draw_standard(void)
{
/* Draw main circle. */
rb->lcd_set_foreground(FGCOLOR);
fillcircle(LCD_WIDTH / 2,
LCD_HEIGHT / 2,
2 * MIN(LCD_WIDTH, LCD_HEIGHT) / 5);
/* Draw center circle. */
rb->lcd_set_foreground(action_on ? BTNCOLOR_DARK : BTNCOLOR_LIGHT);
fillcircle(LCD_WIDTH / 2,
LCD_HEIGHT / 2,
MIN(LCD_WIDTH, LCD_HEIGHT) / 8);
/* Draw pressed buttons. */
if(play_on)
fillcircle(LCD_WIDTH / 2,
3 * LCD_HEIGHT / 4,
MIN(LCD_WIDTH, LCD_HEIGHT) / 8);
if(previous_on)
fillcircle(LCD_WIDTH / 3,
LCD_HEIGHT / 2,
MIN(LCD_WIDTH, LCD_HEIGHT) / 8);
if(next_on)
fillcircle(2 * LCD_WIDTH / 3 + 1,
LCD_HEIGHT / 2,
MIN(LCD_WIDTH, LCD_HEIGHT) / 8);
if(menu_on)
fillcircle(LCD_WIDTH / 2,
LCD_HEIGHT / 4,
MIN(LCD_WIDTH, LCD_HEIGHT) / 8);
/* Restore foreground color. */
rb->lcd_set_foreground(FGCOLOR);
}
/* Draw custom user interface. */
void pd_gui_draw_custom(struct pd_widget* wg, unsigned int widgets)
{
unsigned int i;
int j;
int v;
for(i = 0; i < widgets; wg++, i++)
{
switch(wg->id)
{
case PD_BANG:
/* Clear area to (re-)draw. */
rb->lcd_set_foreground(BGCOLOR);
rb->lcd_fillrect(wg->x, wg->y, wg->w, wg->h);
rb->lcd_set_foreground(FGCOLOR);
/* Draw border (rectangle). */
rb->lcd_drawrect(wg->x, wg->y, wg->w, wg->h);
/* Draw button (circle), being filled depending on value. */
if(((int) wg->value) == 0) /* Button not pressed. */
drawcircle(wg->x + wg->w/2,
wg->y + wg->w/2,
wg->w/2 - 1);
else /* Button pressed. */
fillcircle(wg->x + wg->w/2,
wg->y + wg->w/2,
wg->w/2 - 1);
break;
case PD_VSLIDER:
/* Clear area to (re-)draw. */
rb->lcd_set_foreground(BGCOLOR);
rb->lcd_fillrect(wg->x, wg->y, wg->w, wg->h);
rb->lcd_set_foreground(FGCOLOR);
/* Draw border. */
rb->lcd_drawrect(wg->x, wg->y, wg->w, wg->h);
/* Draw slider. */
v = ((float) wg->h / (wg->max - wg->min)) *
(wg->max - wg->value);
rb->lcd_fillrect(wg->x, wg->y + v, wg->w, 2);
break;
case PD_HSLIDER:
/* Clear area to (re-)draw. */
rb->lcd_set_foreground(BGCOLOR);
rb->lcd_fillrect(wg->x, wg->y, wg->w, wg->h);
rb->lcd_set_foreground(FGCOLOR);
/* Draw border. */
rb->lcd_drawrect(wg->x, wg->y, wg->w, wg->h);
/* Draw slider. */
v = ((float) wg->w / (wg->max - wg->min)) *
(wg->max - wg->value);
rb->lcd_fillrect(wg->x + wg->w - v, wg->y, 2, wg->h);
break;
case PD_HRADIO:
/* Clear area to (re-)draw. */
rb->lcd_set_foreground(BGCOLOR);
rb->lcd_fillrect(wg->x, wg->y, wg->w, wg->h);
rb->lcd_set_foreground(FGCOLOR);
for(j = 0; j < wg->w / wg->h; j++)
{
/* Draw border. */
rb->lcd_drawrect(wg->x + wg->h * j, wg->y, wg->h, wg->h);
/* If marked, draw button. */
if(((int) wg->value) == j)
rb->lcd_fillrect(wg->x + wg->h * j + 2, wg->y + 2,
wg->h - 4, wg->h - 4);
}
break;
case PD_VRADIO:
/* Clear area to (re-)draw. */
rb->lcd_set_foreground(BGCOLOR);
rb->lcd_fillrect(wg->x, wg->y, wg->w, wg->h);
rb->lcd_set_foreground(FGCOLOR);
for(j = 0; j < wg->h / wg->w; j++)
{
/* Draw border. */
rb->lcd_drawrect(wg->x, wg->y + wg->w * j, wg->w, wg->w);
/* If marked, draw button. */
if(((int) wg->value) == j)
rb->lcd_fillrect(wg->x + 2, wg->y + wg->w * j + 2,
wg->w - 4, wg->w - 4);
}
break;
case PD_NUMBER:
rb->lcd_hline(wg->x,
wg->x + wg->w - number_corner,
wg->y);
rb->lcd_drawline(wg->x + wg->w - number_corner,
wg->y,
wg->x + wg->w,
wg->y + number_corner);
rb->lcd_vline(wg->x + wg->w,
wg->y + number_corner,
wg->y + wg->h);
rb->lcd_hline(wg->x,
wg->x + wg->w,
wg->y + wg->h);
rb->lcd_vline(wg->x,
wg->y,
wg->y + wg->h);
char sbuf[12];
ftoan(wg->value, sbuf, 12);
rb->lcd_putsxy(wg->x + 2, wg->y + 2, sbuf);
break;
case PD_TEXT:
rb->lcd_putsxy(wg->x + 2, wg->y, wg->name);
break;
case PD_SYMBOL:
break;
}
}
}
/* Draw the GUI. */
void pd_gui_draw(struct pd_widget* wg, unsigned int widgets)
{
/* Draw GUI. */
if(widgets == 0)
pd_gui_draw_standard();
else
pd_gui_draw_custom(wg, widgets);
/* Update display. */
rb->lcd_update();
}
/* Parse buttons, if needed, send messages to the Pure Data code. */
bool pd_gui_parse_buttons(unsigned int widgets)
{
static long last_bv = 0;
long bv = rb->button_get(false);
/* Extract differences between current and previous button values. */
long diff_bv = bv ^ last_bv;
/* If no difference since the last button value, return here. */
if(diff_bv == 0)
return false;
/* Query whether we have to quit. */
if(bv == PDPOD_QUIT)
{
/* No need to send the quitting message to Pure Data core,
as setting the quit flag ends threads and jumps
to the cleanup code. */
quit = true;
return false;
}
/* Check the action (shift, mode) button. */
if(diff_bv & PDPOD_ACTION)
{
if(bv & PDPOD_ACTION)
{
SEND_TO_CORE("b;\n");
if(widgets == 0)
action_on = true;
}
else
{
if(widgets == 0)
action_on = false;
}
}
/* Check play button. */
if(diff_bv & PDPOD_PLAY)
{
if(bv & PDPOD_PLAY)
{
/* Action + play = pause. */
if(action_on)
{
/* Switch paused state. */
paused = !paused;
SEND_TO_CORE(paused ? "p 1;\n" : "p 0;\n");
}
if(!action_on && !paused)
SEND_TO_CORE("d 1;\n");
if(widgets == 0)
play_on = true;
}
else
{
if(!action_on && !paused)
SEND_TO_CORE("d 0;\n");
if(widgets == 0)
play_on = false;
}
}
/* Check rewind (previous) button. */
if(diff_bv & PDPOD_PREVIOUS)
{
if(bv & PDPOD_PREVIOUS)
{
if(!paused)
SEND_TO_CORE("w 1;\n");
if(widgets == 0)
previous_on = true;
}
else
{
if(!paused)
SEND_TO_CORE("w 0;\n");
if(widgets == 0)
previous_on = false;
}
}
/* Check forward (next) button. */
if(diff_bv & PDPOD_NEXT)
{
if(bv & PDPOD_NEXT)
{
if(!paused)
SEND_TO_CORE("f 1;\n");
if(widgets == 0)
next_on = true;
}
else
{
if(!paused)
SEND_TO_CORE("f 0;\n");
if(widgets == 0)
next_on = false;
}
}
/* Check menu (select) button. */
if(diff_bv & PDPOD_MENU)
{
if(bv & PDPOD_MENU)
{
if(!action_on && !paused)
SEND_TO_CORE("m 1;\n");
if(widgets == 0)
menu_on = true;
}
else
{
if(!action_on && !paused)
SEND_TO_CORE("m 0;\n");
if(widgets == 0)
menu_on = false;
}
}
/* Check scroll right (or up) button. */
if(diff_bv & PDPOD_WHEELRIGHT)
{
if(bv & PDPOD_WHEELRIGHT)
{
SEND_TO_CORE(action_on ? "r 10;\n" : "r 1;\n");
}
}
/* Check scroll left (or down) button. */
if(diff_bv & PDPOD_WHEELLEFT)
{
if(bv & PDPOD_WHEELLEFT)
{
SEND_TO_CORE(action_on ? "l 10;\n" : "l 1;\n");
}
}
/* Backup button value. */
last_bv = bv;
/* GUI has to be updated. */
return true;
}
/* Emulate timer for widgets which use time-out. */
bool pd_gui_apply_timeouts(struct pd_widget* wg, unsigned int widgets)
{
unsigned int i;
bool result = false;
for(i = 0; i < widgets; wg++, i++)
{
if(wg->id == PD_BANG)
{
if(wg->timeout > 0)
{
/* Decrement timeout value. */
wg->timeout--;
/* If zero reached, clear value. */
if(wg->timeout == 0)
{
wg->value = 0;
result = true;
}
}
}
}
return result;
}
/* Parse and apply message from the Pure Data core. */
void pd_gui_parse_message(struct datagram* dg,
struct pd_widget* wg,
unsigned int widgets)
{
unsigned int i;
char* saveptr;
char* object = NULL;
char* argument = NULL;
float argvalue = 0;
object = strtok_r(dg->data, " ", &saveptr);
argument = strtok_r(NULL, " ;\n", &saveptr);
if(argument != NULL)
argvalue = atof(argument);
for(i = 0; i < widgets; wg++, i++)
{
if(strncmp(object, wg->name, strlen(wg->name)) == 0)
{
/* If object not a number, set boundaries. */
if(wg->id != PD_NUMBER)
{
if(argvalue > wg->max)
argvalue = wg->max;
else if(argvalue < wg->min)
argvalue = wg->min;
}
/* Set value. */
if(wg->id == PD_BANG)
{
wg->value = 1;
wg->timeout = HZ / 10;
}
else
{
wg->value = argvalue;
}
}
}
}
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