iTunes

#include <pulse_os.h>
#include <pulse_types.h>
#include <app_resources.h>

#include <stdint.h>
#include <stddef.h>

// Forward Declaration
void handle_received_bluetooth_data(const uint8_t *buffer);

//Holds the timer value for a click hold
int hold_timer_value;
//Whether itunes is currently playing a song
bool play;
//Whether the button was held
bool held=false;
//Whether this is a new song so it would reprint the artist and name
bool new_song=true;
//Color of the text
color24_t text_color = {255, 255, 255, 0};
struct PWTextBox text_box;
char text_buffer[220];
struct PWidgetTextDynamic text_widget;

//Will draw the title of the app
void draw_title()
{
    pulse_draw_image(IMAGE_TITLE,0,0);
}

//Draws the Play/Pause buttons
void draw_play(PulseResource button)
{
    pulse_draw_image(button,3,38);
}

//Draws the next button
void draw_next(PulseResource button)
{
    pulse_draw_image(button,60,46);
}

// This function is called once after the watch has booted up
// and the OS has loaded
void main_app_init()
{
    // Registers a callback function to handle non pulse-protocol bluetooth data received
    pulse_register_callback(ACTION_HANDLE_NON_PULSE_PROTOCOL_BLUETOOTH_DATA, &handle_received_bluetooth_data);
    draw_title();
   
    draw_play(IMAGE_PLAY);
    draw_next(IMAGE_NEXT);

    // When the Pythoinscript starts on the comuter side, it will pause the song in order to "synch"
    // the button with the watch
    play=false;
}

//In the case of a click hold it will vibrate for 75ms and send the value of command to the watch
void click_hold(int command)
{
    pulse_vibe_on();
    pulse_mdelay(75);
    pulse_vibe_off();
    send_bluetooth_response(command);
    held=true;
}

// When the button is down, it will start the click hold timer. If the timer reaches 500ms, the click_hold
// function will be called. If the button is releeased before the timer expires then the timer will
// get cancelled in main_app_handle_button_up()
void main_app_handle_button_down()
{
hold_timer_value=pulse_register_timer(500, &click_hold, 0);

}

// If the click was a click-hold, then either draw the play or the pause button as appropriate.
// and send the command to PlayPause to the iTunes
void main_app_handle_button_up()
{
    if(!held) {
        if(play) {
            draw_play(IMAGE_PLAY);
            play=false;
        } else {
            draw_play(IMAGE_PAUSE);
            play=true;
        }
        pulse_cancel_timer(&hold_timer_value);
        send_bluetooth_response(1);
    }
    held=false;
}

// Main loop. This function is called frequently.
// No blocking calls are allowed in this function or else the watch will reset.
// The inPulse watchdog timer will kick in after 5 seconds if a blocking
// call is made.
void main_app_loop()
{

}

// This function is called whenever the processor is about to sleep (to conserve power)
// The sleep functionality is scheduled with pulse_update_power_down_timer(uint32_t)
void main_app_handle_doz()
{

}

// Prints a status message to the screen when bluetooth is connected or disconnected
void main_app_handle_hardware_update(enum PulseHardwareEvent event)
{
    switch(event) {
        case BLUETOOTH_CONNECTED:
            //printf("BT Connected\n");
            break;

        case BLUETOOTH_DISCONNECTED:
           // printf("BT Disconnected\n");
            break;
    }
}

// Send back a short response to the host that initiated the bluetooth connection
void send_bluetooth_response(int command)
{
    pulse_send_bluetooth_int(command);
}

// Prints the the bluetooth data received to the screen, in our case being the artist name and song name
void handle_received_bluetooth_data(const uint8_t *buffer)
{
    //if the song is new, as in if the next button was pressed
   if(new_song) {
        // Erase the old information by drawing a black box on top of it
        pulse_set_draw_window(5, 88, SCREEN_WIDTH, 125);

        for (int i = 0; i < 3367; i++) {
            pulse_draw_point24(COLOR_BLACK24);
        }

        //Set up the text box for the artist name
        text_box.top = 88;
        text_box.left = 5;
        text_box.right = SCREEN_WIDTH;
        text_box.bottom = 98;

        //Prints the text to the screen
        sprintf(text_buffer, buffer);
        enum PWTextStyle style = (PWTS_TRUNCATE | PWTS_VERTICAL_CENTER);
        pulse_init_dynamic_text_widget(&text_widget, text_buffer, FONT_CANDC_12, text_color, style);
        text_widget.font.resource_id = FONT_CANDC_12;
        text_widget.font.color = text_color;
        pulse_render_text(&text_box, &text_widget);

        //sets the new_song check variable to false
        new_song=false;
    } else {
       //if the song isn't new (as in when the artist was printed but not the name), print the name
        text_box.top = 98;
        text_box.left = 5;
        text_box.right = SCREEN_WIDTH;
        text_box.bottom = 123;

        sprintf(text_buffer, buffer);
        enum PWTextStyle style = (PWTS_WRAP_AT_SPACE | PWTS_VERTICAL_CENTER);
        pulse_init_dynamic_text_widget(&text_widget, text_buffer, FONT_CANDC_12, text_color, style);
        text_widget.font.resource_id = FONT_CANDC_12;
        text_widget.font.color = text_color;
        pulse_render_text(&text_box, &text_widget);
        //sets the new_song check variable to true
        new_song=true;
    }
}