godot/scene/gui/center_container.cpp

/*************************************************************************/
/*  center_container.cpp                                                 */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
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/* distribute, sublicense, and/or sell copies of the Software, and to    */
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/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/*************************************************************************/
#include "center_container.h"


Size2 CenterContainer::get_minimum_size() const {


	if (use_top_left)
		return Size2();
	Size2 ms;
	for(int i=0;i<get_child_count();i++) {

		Control *c = get_child(i)->cast_to<Control>();
		if (!c)
			continue;
		if (c->is_set_as_toplevel())
			continue;
		if (!c->is_visible())
			continue;
		Size2 minsize = c->get_combined_minimum_size();
		ms.width = MAX(ms.width , minsize.width);
		ms.height = MAX(ms.height , minsize.height);


	}

	return ms;

}


void CenterContainer::set_use_top_left(bool p_enable) {

	use_top_left=p_enable;
	queue_sort();

}

bool CenterContainer::is_using_top_left() const {

	return use_top_left;
}


void CenterContainer::_notification(int p_what) {

	if (p_what==NOTIFICATION_SORT_CHILDREN) {

		Size2 size = get_size();
		for(int i=0;i<get_child_count();i++) {

			Control *c = get_child(i)->cast_to<Control>();
			if (!c)
				continue;
			if (c->is_set_as_toplevel())
				continue;

			Size2 minsize = c->get_combined_minimum_size();
			Point2 ofs = use_top_left ? (-minsize*0.5).floor() : ((size - minsize)/2.0).floor();
			fit_child_in_rect(c,Rect2(ofs,minsize));

		}
	}
}

void CenterContainer::_bind_methods() {

	ClassDB::bind_method(_MD("set_use_top_left","enable"),&CenterContainer::set_use_top_left);
	ClassDB::bind_method(_MD("is_using_top_left"),&CenterContainer::is_using_top_left);

	ADD_PROPERTY( PropertyInfo(Variant::BOOL,"use_top_left"),_SCS("set_use_top_left"),_SCS("is_using_top_left"));
}

CenterContainer::CenterContainer() {

	use_top_left=false;
}