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/*
Minetest
Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef MODALMENU_HEADER
#define MODALMENU_HEADER
#include "irrlichttypes_extrabloated.h"
class GUIModalMenu;
class IMenuManager
{
public:
// A GUIModalMenu calls these when this class is passed as a parameter
virtual void createdMenu(GUIModalMenu *menu) = 0;
virtual void deletingMenu(GUIModalMenu *menu) = 0;
};
/*
Remember to drop() the menu after creating, so that it can
remove itself when it wants to.
*/
class GUIModalMenu : public gui::IGUIElement
{
public:
GUIModalMenu(gui::IGUIEnvironment* env,
gui::IGUIElement* parent, s32 id,
IMenuManager *menumgr):
IGUIElement(gui::EGUIET_ELEMENT, env, parent, id,
core::rect<s32>(0,0,100,100))
{
//m_force_regenerate_gui = false;
m_menumgr = menumgr;
m_allow_focus_removal = false;
m_screensize_old = v2u32(0,0);
setVisible(true);
Environment->setFocus(this);
m_menumgr->createdMenu(this);
}
virtual ~GUIModalMenu()
{
m_menumgr->deletingMenu(this);
}
void allowFocusRemoval(bool allow)
{
m_allow_focus_removal = allow;
}
bool canTakeFocus(gui::IGUIElement *e)
{
return (e && (e == this || isMyChild(e))) || m_allow_focus_removal;
}
void draw()
{
if(!IsVisible)
return;
video::IVideoDriver* driver = Environment->getVideoDriver();
v2u32 screensize = driver->getScreenSize();
if(screensize != m_screensize_old /*|| m_force_regenerate_gui*/)
{
m_screensize_old = screensize;
regenerateGui(screensize);
//m_force_regenerate_gui = false;
}
drawMenu();
}
/*
This should be called when the menu wants to quit.
WARNING: THIS DEALLOCATES THE MENU FROM MEMORY. Return
immediately if you call this from the menu itself.
*/
void quitMenu()
{
allowFocusRemoval(true);
// This removes Environment's grab on us
Environment->removeFocus(this);
m_menumgr->deletingMenu(this);
this->remove();
}
void removeChildren()
{
const core::list<gui::IGUIElement*> &children = getChildren();
core::list<gui::IGUIElement*> children_copy;
for(core::list<gui::IGUIElement*>::ConstIterator
i = children.begin(); i != children.end(); i++)
{
children_copy.push_back(*i);
}
for(core::list<gui::IGUIElement*>::Iterator
i = children_copy.begin();
i != children_copy.end(); i++)
{
(*i)->remove();
}
}
virtual void regenerateGui(v2u32 screensize) = 0;
virtual void drawMenu() = 0;
virtual bool OnEvent(const SEvent& event) { return false; };
protected:
//bool m_force_regenerate_gui;
v2u32 m_screensize_old;
private:
IMenuManager *m_menumgr;
// This might be necessary to expose to the implementation if it
// wants to launch other menus
bool m_allow_focus_removal;
};
#endif
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