#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
This module contains the FloatValue class.
"""
from mosaicode.GUI.fieldtypes import *
from mosaicode.model.blockmodel import BlockModel

class Button(BlockModel):

    # -------------------------------------------------------------------------
    def __init__(self):
        BlockModel.__init__(self)

        self.language = "c"
        self.framework = "gtk"
        self.help = "Not to declare"
        self.label = "Knob"
        self.color = "250:150:150:150"
        self.group = "Form"
        self.ports = []

        self.properties = [{"name": "label",
                            "label": "Label",
                            "type": MOSAICODE_STRING,
                            "value": "Label"
                            }
                           ]
        self.codes["struct"] = """
typedef struct t_knob t_knob;

typedef void (*t_knob_callback)(t_knob *knob);

struct t_knob
{

   float value;
   int x;
   int y;
   GtkWidget *drawing_area;
   t_knob_callback callback;

};

"""
        self.codes["function"] = """
static gboolean motion_notify_event_cb (GtkWidget *widget, GdkEventMotion *event, gpointer user_data)
{

  if (!(event->state & GDK_BUTTON1_MASK))
  {
      return TRUE;
  }

  int width;
  int height;

  t_knob *knob = (t_knob *) user_data;

  if (event->x > knob->x){
      knob->value ++;
      knob->x = event->x;
  }else{
          knob->value --;
          knob->x = event->x;
  }

  if (event->y < knob->y){
      knob->value ++;
      knob->y = event->y;
  }else{
          knob->value --;
          knob->y = event->y;
  }


  width = gtk_widget_get_allocated_width(knob->drawing_area);
  height = gtk_widget_get_allocated_height(knob->drawing_area);

  gtk_widget_queue_draw_area(knob->drawing_area, 0, 0, width, height);

  if (knob->callback != NULL)
  {
      knob->callback(knob);

  }

  return TRUE;
}


gboolean draw(GtkWidget *widget, GdkEventConfigure *event, gpointer user_data)
{

  cairo_t *cr;

  t_knob *knob = (t_knob *) user_data;

  cr = gdk_cairo_create(gtk_widget_get_window(knob->drawing_area));
  int width;
  int height;

  width = gtk_widget_get_allocated_width(widget);
  height = gtk_widget_get_allocated_height(widget);

  // Background circle
  cairo_set_source_rgb(cr, 0, 1, 0);
  cairo_set_line_width(cr, 1);
  cairo_arc(cr, width / 2, height / 2.0, MIN(width, height)/2.0, 0., 2.0 * G_PI);
  cairo_fill_preserve(cr);
  cairo_set_source_rgb(cr, 0, 0, 0);
  cairo_stroke(cr);

  float angle1 = G_PI; // Start point
  float angle2 = angle1 + knob->value * (2.0 * G_PI / 128.0); // Start point

  cairo_new_sub_path(cr);
  cairo_set_source_rgb(cr, 1, 0, 0);
  cairo_arc(cr, width / 2, height / 2.0, MIN(width, height)/3.0, angle1, angle2);
  cairo_line_to (cr, width / 2, height / 2);
  cairo_line_to (cr, MIN(width, height)/2.0 - MIN(width, height)/3.0 , height / 2);

  cairo_fill_preserve(cr);
  cairo_set_source_rgb(cr, 0, 0, 0);
  cairo_stroke(cr);
  cairo_destroy(cr);
  return FALSE;

}

GtkWidget * create_knob(int value, int size, t_knob_callback callback)
{
    t_knob * knob = (t_knob *) malloc(sizeof(t_knob));
    knob->callback = callback;
    knob->x = 0;
    knob->y = 0;
    knob->value = value;
    knob->drawing_area = gtk_drawing_area_new();

    gtk_widget_set_events(knob->drawing_area, GDK_POINTER_MOTION_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK);

   gtk_widget_set_size_request(knob->drawing_area, size, size);
   g_signal_connect(knob->drawing_area, "draw", G_CALLBACK(draw), knob);
   g_signal_connect (knob->drawing_area, "motion-notify-event",G_CALLBACK (motion_notify_event_cb), knob);
   return knob->drawing_area;
}

"""

        self.codes["callback"] = """
void callback_$id$(t_knob * knob){

    printf("adsf");

}
"""
        self.codes["declaration"] = """
   GtkWidget *knob_$id$;
   GtkWidget *knob_b_$id$;
"""

        self.codes["configuration"] = """
   knob_$id$ = create_knob(10, 100, callback_$id$);
   gtk_container_add (GTK_CONTAINER (vbox), knob_$id$);

   knob_b_$id$ = create_knob(10, 100, NULL);
   gtk_container_add (GTK_CONTAINER (vbox), knob_b_$id$);
"""