#include "gui.h"
#include "gui_container.h"

namespace Gui {


bool Container::HandleMouseEvent(MouseButtonEvent* e) {
  float x = e->x;
  float y = e->y;
  for(std::list<widget_pos>::iterator i = m_children.begin(); i != m_children.end(); ++i) {
    float pos[2], size[2];
    if(!(*i).w->IsVisible()) continue;
    int evmask = (*i).w->GetEventMask();
    if(e->isdown) {
      if(!(evmask & Widget::EVENT_MOUSEDOWN)) continue;
    } else {
      if(!(evmask & Widget::EVENT_MOUSEUP)) continue;
    }
    (*i).w->GetPosition(pos);
    (*i).w->GetSize(size);

    if((x >= pos[0]) && (x < pos[0]+size[0]) &&
       (y >= pos[1]) && (y < pos[1]+size[1])) {
      e->x = x-pos[0];
      e->y = y-pos[1];
      bool alive;
      if(e->isdown) {
        alive = (*i).w->OnMouseDown(e);
      } else {
        alive = (*i).w->OnMouseUp(e);
      }
      if(!alive) return false;
    }
  }
  return true;
}

void Container::DeleteAllChildren(void) {
  for(std::list<widget_pos>::iterator i = m_children.begin(); i != m_children.end(); ++i) {
    delete (*i).w;
  }
  m_children.clear();
}

void Container::PrependChild(Widget* child, float x, float y) {
  widget_pos wp;
  wp.w = child;
  wp.pos[0] = x; wp.pos[1] = y;
  child->SetPosition(x, y);
  child->SetParent(this);
  m_children.push_front(wp);
}

void Container::AppendChild(Widget* child, float x, float y) {
  widget_pos wp;
  wp.w = child;
  wp.pos[0] = x; wp.pos[1] = y;
  child->SetPosition(x, y);
  child->SetParent(this);
  m_children.push_back(wp);
}

void Container::Draw(void) {
  for(std::list<widget_pos>::iterator i = m_children.begin(); i != m_children.end(); ++i) {
    if(!(*i).w->IsVisible()) continue;
    glPushMatrix();
    glTranslatef((*i).pos[0], (*i).pos[1], 0);
    (*i).w->Draw();
    glPopMatrix();
  }
}

bool Container::OnMouseDown(MouseButtonEvent* e) {
  return HandleMouseEvent(e);
}

bool Container::OnMouseUp(MouseButtonEvent* e) {
  return HandleMouseEvent(e);
}

void Container::ShowAll(void) {
  for(std::list<widget_pos>::iterator i = m_children.begin(); i != m_children.end(); ++i) {
    (*i).w->Show();
  }
  Show();
}

void Container::HideAll(void) {
  for(std::list<widget_pos>::iterator i = m_children.begin(); i != m_children.end(); ++i) {
    (*i).w->Hide();
  }
  Hide();
}

}