/* gtkmm example Copyright (C) 2013 gtkmm development team
 *
 * 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 program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, see <https://www.gnu.org/licenses/>.
 */

#include "examplewindow.h"

ExampleWindow::ExampleWindow()
 : m_format_buttons_box(Gtk::ORIENTATION_HORIZONTAL),
   m_toggle_button("Button"),
   m_toggle_form_popover(m_toggle_button),
   m_toggle_form_label("Non-modal Popover"),
   m_toggle_form_combo_label("Popover position:"),
   m_calendar_popover(m_calendar),
   m_calendar_popover_label("Label:")
{
  // Window properties
  set_title("Popover Example");
  set_border_width(12);
  set_default_size(500, -1);

  // Button
  m_toggle_button.signal_toggled().connect(sigc::mem_fun(*this, &ExampleWindow::on_button_toggled));

  // Form popover
  configure_form_popover();

  // Calendar
  m_calendar.set_hexpand();
  m_calendar.set_vexpand();

  // Calendar popover
  configure_cal_popover();

  // Layout
  m_grid.set_row_spacing(6);
  m_grid.attach(m_toggle_button, 0, 0, 1, 1);
  m_grid.attach(m_calendar, 0, 1, 6, 1);
  add(m_grid);

  show_all_children();
}

ExampleWindow::~ExampleWindow()
{
}

void ExampleWindow::on_button_toggled()
{
  bool active = m_toggle_button.get_active();
  m_toggle_form_popover.set_visible(active);
}

void ExampleWindow::configure_form_popover()
{
  configure_form_buttons();
  configure_form_combo();

  m_toggle_form_grid.set_row_spacing(6);
  m_toggle_form_grid.set_column_spacing(6);
  m_toggle_form_grid.attach(m_toggle_form_label, 0, 0, 2, 1);
  m_toggle_form_grid.attach(m_format_buttons_box, 0, 1, 2, 1);
  m_toggle_form_grid.attach(m_toggle_form_combo_label, 0, 2, 1, 1);
  m_toggle_form_grid.attach(m_toggle_form_combo, 1, 2, 1, 1);
  m_toggle_form_grid.show_all();

  m_toggle_form_popover.add(m_toggle_form_grid);
  m_toggle_form_popover.set_position(Gtk::POS_BOTTOM);
  m_toggle_form_popover.set_border_width(6);
  m_toggle_form_popover.set_modal(false);
}

void ExampleWindow::configure_form_buttons()
{
  m_toggle_form_buttons[0].set_image_from_icon_name("format-justify-left-symbolic", Gtk::ICON_SIZE_BUTTON, true);
  m_toggle_form_buttons[1].set_image_from_icon_name("format-justify-center-symbolic", Gtk::ICON_SIZE_BUTTON, true);
  m_toggle_form_buttons[2].set_image_from_icon_name("format-justify-right-symbolic", Gtk::ICON_SIZE_BUTTON, true);

  m_toggle_form_buttons[0].set_mode(false);
  m_toggle_form_buttons[1].set_mode(false);
  m_toggle_form_buttons[2].set_mode(false);

  m_toggle_form_buttons[1].join_group(m_toggle_form_buttons[0]);
  m_toggle_form_buttons[2].join_group(m_toggle_form_buttons[0]);

  m_format_buttons_box.pack_start(m_toggle_form_buttons[0], Gtk::PACK_EXPAND_WIDGET);
  m_format_buttons_box.pack_start(m_toggle_form_buttons[1], Gtk::PACK_EXPAND_WIDGET);
  m_format_buttons_box.pack_start(m_toggle_form_buttons[2], Gtk::PACK_EXPAND_WIDGET);

  m_format_buttons_box.set_hexpand();

  // Group format buttons so that they appear that they belong together
  auto style_context = m_format_buttons_box.get_style_context();
  style_context->add_class("raised");
  style_context->add_class("linked");
}

void ExampleWindow::configure_form_combo()
{
  m_toggle_form_combo.append("Bottom");
  m_toggle_form_combo.append("Right");

  m_toggle_form_combo.set_active(0);

  m_toggle_form_combo.signal_changed().connect(sigc::mem_fun(*this, &ExampleWindow::on_combo_changed));
}

void ExampleWindow::on_combo_changed()
{
  int active_entry = m_toggle_form_combo.get_active_row_number();

  if (active_entry == 0)
  {
    m_toggle_form_popover.set_position(Gtk::POS_BOTTOM);
  }
  else if (active_entry == 1)
  {
    m_toggle_form_popover.set_position(Gtk::POS_RIGHT);
  }
}

void ExampleWindow::configure_cal_popover()
{
  m_calendar.signal_day_selected().connect(sigc::mem_fun(*this, &ExampleWindow::on_day_selected));

  m_calendar_form_grid.set_column_spacing(6);
  m_calendar_form_grid.attach(m_calendar_popover_label, 0, 0, 1, 1);
  m_calendar_form_grid.attach(m_calendar_popover_entry, 1, 0, 1, 1);
  m_calendar_form_grid.show_all();

  m_calendar_popover.add(m_calendar_form_grid);
  m_calendar_popover.set_border_width(6);
}

void ExampleWindow::on_day_selected()
{
  Gdk::Rectangle rect;

  auto current_event = gtk_get_current_event();

  if (current_event->type != GDK_BUTTON_PRESS)
  {
    return;
  }

  gdk_window_coords_to_parent (current_event->button.window,
                               current_event->button.x, current_event->button.y,
                               &current_event->button.x, &current_event->button.y);
  Gtk::Allocation allocation = m_calendar.get_allocation();
  rect.set_x(current_event->button.x - allocation.get_x());
  rect.set_y(current_event->button.y - allocation.get_y());
  rect.set_width(1);
  rect.set_height(1);

  m_calendar_popover.set_pointing_to(rect);
  m_calendar_popover.set_visible(true);

  m_calendar_popover_entry.set_text("");

  gdk_event_free (current_event);
}

