genode/demo/include/scout/parent_element.h
Norman Feske 3394be9464 Clean up scout widgets
This patch integrate the scout widgets with Genode's new API headers
'util/geometry.h', 'os/surface.h' and 'os/texture.h'. Thereby, we get
almost rid of the platform-abstraction shim that was never used anyway.

Furthermore, it extracts the parts that are worth reusing from the
scout implementation to the public location 'demo/include/scout'.
2014-01-27 18:54:06 +01:00

96 lines
1.9 KiB
C++

/*
* \brief Scout GUI parent element
* \author Norman Feske
* \date 2006-08-30
*/
/*
* Copyright (C) 2006-2013 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _INCLUDE__SCOUT__PARENT_ELEMENT_H_
#define _INCLUDE__SCOUT__PARENT_ELEMENT_H_
#include <scout/element.h>
namespace Scout {
class Element;
class Parent_element;
}
class Scout::Parent_element : public Element
{
protected:
Element *_first;
Element *_last;
/**
* Format child element by a given width an horizontal offset
*/
int _format_children(int x, int w);
public:
/**
* Constructor
*/
Parent_element() { _first = _last = 0; }
/**
* Adopt a child element
*/
void append(Element *e);
/**
* Release child element from parent element
*/
void remove(Element const *e);
/**
* Dispose references to the specified element
*
* The element is not necessarily an immediate child but some element
* of the element-subtree. This function gets propagated to the root
* parent (e.g., user state manager), which can reset the mouse focus
* of the focused element vanishes.
*/
virtual void forget(Element const *e);
/**
* Element interface
*/
void draw(Canvas_base &, Point);
Element *find(Point);
Element *find_by_y(int);
void fill_cache(Canvas_base &);
void flush_cache(Canvas_base &);
void geometry(Rect);
/**
* Execute function on each child
*
* The functor FUNC takes a reference to the element as argument.
*/
template <typename FUNC>
void for_each_child(FUNC func)
{
for (Element *e = _first; e; e = e->next)
func(*e);
}
};
template <typename FUNC>
void Scout::Element::for_each_sibling(FUNC func)
{
if (parent())
parent()->for_each_child(func);
}
#endif /* _INCLUDE__SCOUT__PARENT_ELEMENT_H_ */