rockbox/apps/gui/skin_engine/skin_touchsupport.c

/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 * $Id$
 *
 * Copyright (C) 2009 - Jonathan Gordon
 *
 * 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 "config.h"
#include <stdio.h>
#include "action.h"
#include "skin_engine.h"
#include "wps_internals.h"
#include "misc.h"
#include "option_select.h"
#include "sound.h"
#include "settings_list.h"
#include "wps.h"
#include "lang.h"
#include "splash.h"
#include "playlist.h"
#include "dsp_misc.h"

/** Disarms all touchregions. */
void skin_disarm_touchregions(struct wps_data *data)
{
    char* skin_buffer = get_skin_buffer(data);
    struct skin_token_list *regions = SKINOFFSETTOPTR(skin_buffer, data->touchregions);
    while (regions)
    {
        struct wps_token *token = SKINOFFSETTOPTR(skin_buffer, regions->token);
        struct touchregion *region = SKINOFFSETTOPTR(skin_buffer, token->value.data);
        region->armed = false;
        regions = SKINOFFSETTOPTR(skin_buffer, regions->next);
    }
}

/* Get the touched action.
 * egde_offset is a percentage value for the position of the touch
 * inside the bar for regions which arnt WPS_TOUCHREGION_ACTION type.
 */
int skin_get_touchaction(struct wps_data *data, int* edge_offset,
                         struct touchregion **retregion)
{
    int returncode = ACTION_NONE;
    short x,y;
    short vx, vy;
    int type = action_get_touchscreen_press(&x, &y);
    struct skin_viewport *wvp;
    struct touchregion *r, *temp = NULL;
    char* skin_buffer = get_skin_buffer(data);
    bool repeated = (type == BUTTON_REPEAT);
    bool released = (type == BUTTON_REL);
    bool pressed = (type == BUTTON_TOUCHSCREEN);
    struct skin_token_list *regions = SKINOFFSETTOPTR(skin_buffer, data->touchregions);
    bool needs_repeat;

    while (regions)
    {
        struct wps_token *token = SKINOFFSETTOPTR(skin_buffer, regions->token);
        r = SKINOFFSETTOPTR(skin_buffer, token->value.data);
        wvp = SKINOFFSETTOPTR(skin_buffer, r->wvp);
        /* make sure this region's viewport is visible */
        if (wvp->hidden_flags&VP_DRAW_HIDDEN)
        {
            regions = SKINOFFSETTOPTR(skin_buffer, regions->next);
            continue;
        }
        if (data->touchscreen_locked && 
            (r->action != ACTION_TOUCH_SOFTLOCK && !r->allow_while_locked))
        {
            regions = SKINOFFSETTOPTR(skin_buffer, regions->next);
            continue;
        }
        needs_repeat = r->press_length != PRESS;
        /* check if it's inside this viewport */
        if (viewport_point_within_vp(&(wvp->vp), x, y))
        {   /* reposition the touch inside the viewport since touchregions
             * are relative to a preceding viewport */
            vx = x - wvp->vp.x;
            vy = y - wvp->vp.y;

            /* project touches in the padding region so they clamp to the
             * edge of the region instead */
            if(r->x - r->wpad <= vx && vx < r->x)
                vx = r->x;
            else if(r->x + r->width <= vx && vx < r->x + r->width + r->wpad)
                vx = r->x + r->width - 1;
            if(r->y - r->hpad <= vy && vy < r->y)
                vy = r->y;
            else if(r->y + r->height <= vy && vy < r->y + r->height + r->hpad)
                vy = r->y + r->height - 1;

            /* now see if the point is inside this region */
            if (vx >= r->x && vx < r->x+r->width &&
                vy >= r->y && vy < r->y+r->height)
            {
                /* reposition the touch within the area */
                vx -= r->x;
                vy -= r->y;

                switch(r->action)
                {
                    case ACTION_TOUCH_SCROLLBAR:
                    case ACTION_TOUCH_VOLUME:
                    case ACTION_TOUCH_SETTING:
                        if (edge_offset)
                        {
                            struct progressbar *bar =
                                    SKINOFFSETTOPTR(skin_buffer, r->bar);
                            if(r->width > r->height) {
                                if(r->width > 1)
                                    *edge_offset = vx*1000/(r->width - 1);
                                else
                                    *edge_offset = 0;
                            } else {
                                /* vertical bars are bottom-up by default */
                                if(r->height > 1)
                                    *edge_offset = 1000 - vy*1000/(r->height - 1);
                                else
                                    *edge_offset = 0;
                            }

                            if (r->reverse_bar || (bar && bar->invert_fill_direction))
                                *edge_offset = 1000 - *edge_offset;
                        }
                        temp = r;
                        returncode = r->action;
                        r->last_press = current_tick;
                        break;
                    default:
                        if (r->armed && ((repeated && needs_repeat) || 
                            (released && !needs_repeat)))
                        {
                            returncode = r->action;
                            temp = r;
                        }
                        if (pressed)
                        {
                            r->armed = true;
                            r->last_press = current_tick;
                        }
                        break;
                }
            }
        }
        regions = SKINOFFSETTOPTR(skin_buffer, regions->next);
    }

    /* On release, all regions are disarmed. */
    if (released)
        skin_disarm_touchregions(data);
    if (retregion && temp)
        *retregion = temp;
    if (temp && temp->press_length == LONG_PRESS)
        temp->armed = false;
    
    if (returncode != ACTION_NONE)
    {
        if (global_settings.party_mode)
        {
            switch (returncode)
            {
                case ACTION_WPS_PLAY:
                case ACTION_WPS_SKIPPREV:
                case ACTION_WPS_SKIPNEXT:
                case ACTION_WPS_STOP:
                    returncode = ACTION_NONE;
                    break;
                default:
                    break;
            }
        }
        switch (returncode)
        {
            case ACTION_TOUCH_SOFTLOCK:
                data->touchscreen_locked = !data->touchscreen_locked;
                returncode = ACTION_NONE;
                break;
            case ACTION_WPS_PLAY:
                if (!audio_status())
                {
                    if ( global_status.resume_index != -1 )
                    {
                        if (playlist_resume() != -1)
                        {
                            playlist_start(global_status.resume_index,
                                global_status.resume_elapsed,
                                global_status.resume_offset);
                        }
                    }
                    else
                    {
                        splash(HZ*2, ID2P(LANG_NOTHING_TO_RESUME));
                    }
                }
                else
                {
                    wps_do_playpause(false);
                }
                returncode = ACTION_REDRAW;
                break;
            case ACTION_WPS_SKIPPREV:
                audio_prev();
                returncode = ACTION_REDRAW;
                break;
            case ACTION_WPS_SKIPNEXT:
                audio_next();
                returncode = ACTION_REDRAW;
                break;
            case ACTION_WPS_STOP:
                audio_stop();
                returncode = ACTION_REDRAW;
                break;
            case ACTION_SETTINGS_INC:
            case ACTION_SETTINGS_DEC:
            {
                const struct settings_list *setting = 
                                            temp->setting_data.setting;
                option_select_next_val(setting, 
                                       returncode == ACTION_SETTINGS_DEC,
                                       true);
                returncode = ACTION_REDRAW;
            }
            break;
            case ACTION_SETTINGS_SET:
            {
                struct touchsetting *data = &temp->setting_data;
                const struct settings_list *s = data->setting;
                void (*f)(int) = NULL;
                switch (s->flags&F_T_MASK)
                {
                    case F_T_CUSTOM:
                        s->custom_setting
                            ->load_from_cfg(s->setting, SKINOFFSETTOPTR(skin_buffer, data->value.text));
                        break;                          
                    case F_T_INT:
                    case F_T_UINT:
                        *(int*)s->setting = data->value.number;
                        if ((s->flags & F_T_SOUND) == F_T_SOUND)
                            sound_set(s->sound_setting->setting, data->value.number);
                        else if (s->flags&F_CHOICE_SETTING)
                            f = s->choice_setting->option_callback;
                        else if (s->flags&F_TABLE_SETTING)
                            f = s->table_setting->option_callback;
                        else
                            f = s->int_setting->option_callback;

                        if (f)
                            f(data->value.number);
                        break;
                    case F_T_BOOL:
                        *(bool*)s->setting = data->value.number ? true : false;
                        if (s->bool_setting->option_callback)
                            s->bool_setting
                                ->option_callback(data->value.number ? true : false);
                        break;
                }
                returncode = ACTION_REDRAW;
            }
            break;
            case ACTION_TOUCH_MUTE:
            {
                const int min_vol = sound_min(SOUND_VOLUME);
                if (global_settings.volume == min_vol)
                    global_settings.volume = temp->value;
                else
                {
                    temp->value = global_settings.volume;
                    global_settings.volume = min_vol;
                }
                setvol();
                returncode = ACTION_REDRAW;
            }
            break;
            case ACTION_TOUCH_SHUFFLE: /* toggle shuffle mode */
            {
                global_settings.playlist_shuffle = 
                                            !global_settings.playlist_shuffle;
                replaygain_update();
                if (global_settings.playlist_shuffle)
                    playlist_randomise(NULL, current_tick, true);
                else
                    playlist_sort(NULL, true);
                returncode = ACTION_REDRAW;
            }
            break;
            case ACTION_TOUCH_REPMODE: /* cycle the repeat mode setting */
            {
                const struct settings_list *rep_setting = 
                                find_setting(&global_settings.repeat_mode, NULL);
                option_select_next_val(rep_setting, false, true);
                audio_flush_and_reload_tracks();
                returncode = ACTION_REDRAW;
            }
            break;
            case ACTION_TOUCH_SETTING:
            {                
                struct progressbar *bar =
                        SKINOFFSETTOPTR(skin_buffer, temp->bar);
                if (bar && edge_offset)
                {                    
                    int val, count;
                    get_setting_info_for_bar(bar->setting_id, &count, &val);
                    val = *edge_offset * count / 1000;
                    update_setting_value_from_touch(bar->setting_id, val);
                }
            }
            break;
        }
        return returncode;
    }

    return ACTION_TOUCHSCREEN;
}