radio_button.h

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#pragma once
#include "appearance.h"
#include "button_base.h"
#include "visual_styles/radio_button_state.h"
 
namespace xtd {
  namespace forms {
    class forms_export_ radio_button : public button_base {
    public:
      radio_button();
 
      virtual forms::appearance appearance() const {return appearance_;}
      virtual radio_button& appearance(forms::appearance appearance);
 
      virtual bool auto_check() const {return auto_check_;}
      virtual radio_button& auto_check(bool auto_check);
      
      virtual bool checked() const {return checked_;}
      virtual radio_button& checked(bool checked);
      
      virtual content_alignment check_align() const {return check_align_;}
      virtual radio_button& check_align(content_alignment check_align);
 
      drawing::size default_size() const override {return {104, 25};}
 
      void perform_click();
 
      xtd::ustring to_string() const noexcept override {return ustring::format("{}, checked: {}", ustring::full_class_name(*this), checked_);}
 
      event<radio_button, event_handler> appearance_changed;
 
      event<radio_button, event_handler> checked_changed;
 
    protected:
      forms::create_params create_params() const override;
      
      drawing::size measure_control() const override;
 
      virtual void on_appearance_changed(const event_args& e) {
        if (flat_style_ != xtd::forms::flat_style::system) invalidate();
        appearance_changed(*this, e);
      }
      
      virtual void on_checked_changed(const event_args& e) {
        if (flat_style_ != xtd::forms::flat_style::system)  {
          if (!checked_) state_ = xtd::forms::visual_styles::radio_button_state::unchecked_normal;
          else state_ = xtd::forms::visual_styles::radio_button_state::checked_normal;
          invalidate();
        }
        checked_changed(*this, e);
      }
 
      void on_enabled_changed(const event_args& e) override {
        if (flat_style_ != xtd::forms::flat_style::system) {
          if (!checked_) state_ = enabled() ? xtd::forms::visual_styles::radio_button_state::unchecked_normal : xtd::forms::visual_styles::radio_button_state::unchecked_disabled;
          else state_ = enabled() ? xtd::forms::visual_styles::radio_button_state::checked_normal : xtd::forms::visual_styles::radio_button_state::checked_disabled;
        }
        button_base::on_enabled_changed(e);
      }
      
      void on_got_focus(const event_args& e) override {
        button_base::on_got_focus(e);
        if (flat_style_ != xtd::forms::flat_style::system) {
          if (!checked_) state_ = enabled() ? xtd::forms::visual_styles::radio_button_state::unchecked_normal : xtd::forms::visual_styles::radio_button_state::unchecked_disabled;
          else state_ = enabled() ? xtd::forms::visual_styles::radio_button_state::checked_normal : xtd::forms::visual_styles::radio_button_state::checked_disabled;
        }
      }
 
      void on_handle_created(const event_args& e) override;
 
      void on_lost_focus(const event_args& e) override {
        button_base::on_lost_focus(e);
        if (flat_style_ != xtd::forms::flat_style::system) {
          if (!checked_) state_ = enabled() ? xtd::forms::visual_styles::radio_button_state::unchecked_normal : xtd::forms::visual_styles::radio_button_state::unchecked_disabled;
          else state_ = enabled() ? xtd::forms::visual_styles::radio_button_state::checked_normal : xtd::forms::visual_styles::radio_button_state::checked_disabled;
        }
      }
      
      void on_mouse_down(const mouse_event_args& e) override {
        if (flat_style_ != xtd::forms::flat_style::system) {
          if (!checked_) state_ = xtd::forms::visual_styles::radio_button_state::unchecked_pressed;
          else state_ = xtd::forms::visual_styles::radio_button_state::checked_pressed;
        }
        button_base::on_mouse_down(e);
      }
      
      void on_mouse_enter(const event_args& e) override {
        if (flat_style_ != xtd::forms::flat_style::system) {
          if (!checked_) state_ = xtd::forms::visual_styles::radio_button_state::unchecked_hot;
          else state_ = xtd::forms::visual_styles::radio_button_state::checked_hot;
        }
        button_base::on_mouse_enter(e);
      }
      
      void on_mouse_leave(const event_args& e) override {
        if (flat_style_ != xtd::forms::flat_style::system) {
          if (!checked_) state_ = xtd::forms::visual_styles::radio_button_state::unchecked_normal;
          else state_ = xtd::forms::visual_styles::radio_button_state::checked_normal;
        }
        button_base::on_mouse_leave(e);
      }
      
      void on_mouse_move(const mouse_event_args& e) override {
        if (flat_style_ != xtd::forms::flat_style::system && (e.button() & mouse_buttons::left) == mouse_buttons::left && !client_rectangle().contains(e.location()) && (state_ == xtd::forms::visual_styles::radio_button_state::unchecked_pressed || state_ == xtd::forms::visual_styles::radio_button_state::checked_pressed)) {
          if (!checked_) state_ = xtd::forms::visual_styles::radio_button_state::unchecked_hot;
          else state_ = xtd::forms::visual_styles::radio_button_state::checked_hot;
        }
        button_base::on_mouse_move(e);
      }
      
      void on_mouse_up(const mouse_event_args& e) override {
        if (flat_style_ != xtd::forms::flat_style::system && (state_ == xtd::forms::visual_styles::radio_button_state::unchecked_pressed || state_ == xtd::forms::visual_styles::radio_button_state::checked_pressed)) {
          if (!checked_) state_ = xtd::forms::visual_styles::radio_button_state::unchecked_hot;
          else state_ = xtd::forms::visual_styles::radio_button_state::checked_hot;
        }
        button_base::on_mouse_up(e);
      }
 
      void on_paint(paint_event_args& e) override;
 
      void wnd_proc(message& message) override;
 
      void wm_mouse_double_click(message& message);
      void wm_mouse_down(message& message);
      void wm_mouse_up(message& message);
 
      forms::appearance appearance_ = forms::appearance::normal;
      bool auto_check_ = true;
      bool checked_ = false;
      content_alignment check_align_ = content_alignment::middle_left;
      xtd::forms::visual_styles::radio_button_state state_ = xtd::forms::visual_styles::radio_button_state::unchecked_normal;
    };
  }
}