/*************************************************************************/
/*  button_array.cpp                                                     */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                    http://www.godotengine.org                         */
/*************************************************************************/
/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur.                 */
/*                                                                       */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
/*                                                                       */
/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
/*                                                                       */
/* 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.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
/*************************************************************************/
#include "button_array.h"


bool ButtonArray::_set(const StringName& p_name, const Variant& p_value) {

	String n=String(p_name);
	if (n.begins_with("button/")) {

		String what = n.get_slicec('/',1);
		if (what=="count") {
			int new_size=p_value;
			if (new_size>0 && buttons.size()==0) {
				selected=0;
			}

			if (new_size < buttons.size()) {
				if (selected>=new_size)
					selected=new_size-1;
			}
			buttons.resize(new_size);
			_change_notify();
			minimum_size_changed();
		} else if (what=="align") {
			set_align(Align(p_value.operator int()));
		} else if (what=="selected") {
			set_selected(p_value);
		} else if (what == "min_button_size") {
			min_button_size = p_value;
		} else {
			int idx=what.to_int();
			ERR_FAIL_INDEX_V(idx,buttons.size(),false);
			String f = n.get_slicec('/',2);
			if (f=="text")
				buttons[idx].text=p_value;
			else if (f=="icon")
				buttons[idx].icon=p_value;
			else
				return false;

		}

		update();
		return true;
	}

	return false;

}

bool ButtonArray::_get(const StringName& p_name,Variant &r_ret) const {

	String n=String(p_name);
	if (n.begins_with("button/")) {

		String what = n.get_slicec('/',1);
		if (what=="count") {
			r_ret=buttons.size();
		} else if (what=="align") {
			r_ret=get_align();
		} else if (what=="selected") {
			r_ret=get_selected();
		} else if (what == "min_button_size"){
			r_ret = min_button_size;
		} else {
			int idx=what.to_int();
			ERR_FAIL_INDEX_V(idx,buttons.size(),false);
			String f = n.get_slicec('/',2);
			if (f=="text")
				r_ret=buttons[idx].text;
			else if (f=="icon")
				r_ret=buttons[idx].icon;
			else
				return false;

		}

		return true;
	}

	return false;
}
void ButtonArray::_get_property_list( List<PropertyInfo> *p_list) const {

	p_list->push_back( PropertyInfo( Variant::INT, "button/count",PROPERTY_HINT_RANGE,"0,512,1"));
	p_list->push_back( PropertyInfo( Variant::INT, "button/min_button_size",PROPERTY_HINT_RANGE,"0,1024,1"));
	p_list->push_back( PropertyInfo( Variant::INT, "button/align",PROPERTY_HINT_ENUM,"Begin,Center,End,Fill,Expand"));
	for(int i=0;i<buttons.size();i++) {
		String base="button/"+itos(i)+"/";
		p_list->push_back( PropertyInfo( Variant::STRING, base+"text"));
		p_list->push_back( PropertyInfo( Variant::OBJECT, base+"icon",PROPERTY_HINT_RESOURCE_TYPE,"Texture"));
	}
	if (buttons.size()>0) {
		p_list->push_back( PropertyInfo( Variant::INT, "button/selected",PROPERTY_HINT_RANGE,"0,"+itos(buttons.size()-1)+",1"));
	}

}


Size2 ButtonArray::get_minimum_size() const {

	Ref<StyleBox> style_normal = get_stylebox("normal");
	Ref<StyleBox> style_selected = get_stylebox("selected");
	Ref<Font> font_normal = get_font("font");
	Ref<Font> font_selected = get_font("font_selected");
	int icon_sep = get_constant("icon_separator");
	int button_sep = get_constant("button_separator");

	Size2 minsize;

	for(int i=0;i<buttons.size();i++) {

		Ref<StyleBox> sb = i==selected ? style_selected : style_normal;
		Ref<Font> f = i==selected ? font_selected : font_normal;

		Size2 ms;
		ms = f->get_string_size(buttons[i].text);
		if (buttons[i].icon.is_valid()) {

			Size2 bs = buttons[i].icon->get_size();
			ms.height = MAX(ms.height,bs.height);
			ms.width+=bs.width+icon_sep;
		}

		ms+=sb->get_minimum_size();

		buttons[i]._ms_cache=ms[orientation];

		minsize[orientation]+=ms[orientation];
		if (i>0)
			minsize[orientation]+=button_sep;
		minsize[!orientation] = MAX(minsize[!orientation],ms[!orientation]);

	}

	return minsize;


}

void ButtonArray::_notification(int p_what) {

	switch(p_what) {
		case NOTIFICATION_READY:{
		        MethodInfo mi;
			mi.name="mouse_sub_enter";

			add_user_signal(mi);

		}break;
		case NOTIFICATION_DRAW: {

			Size2 size=get_size();
			Size2 minsize=get_combined_minimum_size();
			Ref<StyleBox> style_normal = get_stylebox("normal");
			Ref<StyleBox> style_selected = get_stylebox("selected");
			Ref<StyleBox> style_focus = get_stylebox("focus");
			Ref<StyleBox> style_hover = get_stylebox("hover");
			Ref<Font> font_normal = get_font("font");
			Ref<Font> font_selected = get_font("font_selected");
			int icon_sep = get_constant("icon_separator");
			int button_sep = get_constant("button_separator");
			Color color_normal = get_color("font_color");
			Color color_selected = get_color("font_color_selected");

			int sep=button_sep;
			int ofs=0;
			int expand=0;

			switch(align) {
				case ALIGN_BEGIN: {

					ofs=0;
				} break;
				case ALIGN_CENTER: {

					ofs=Math::floor((size[orientation] - minsize[orientation])/2);
				} break;
				case ALIGN_END: {

					ofs=Math::floor((size[orientation] - minsize[orientation]));
				} break;
				case ALIGN_FILL: {

					if (buttons.size()>1)
						sep+=Math::floor((size[orientation]- minsize[orientation])/(buttons.size()-1.0));
					ofs=0;
				} break;
				case ALIGN_EXPAND_FILL: {

					ofs=0;
					expand=size[orientation] - minsize[orientation];
				} break;



			}

			int op_size = orientation==VERTICAL ? size.width : size.height;


			for(int i=0;i<buttons.size();i++) {

				int ms = buttons[i]._ms_cache;
				int s=ms;
				if (expand>0) {
					s+=expand/buttons.size();
				}
				if(min_button_size != -1 && s < min_button_size){
					s = min_button_size;
				}

				Rect2 r;
				r.pos[orientation]=ofs;
				r.pos[!orientation]=0;
				r.size[orientation]=s;
				r.size[!orientation]=op_size;

				Ref<Font> f;
				Color c;
				if (i==selected) {
					draw_style_box(style_selected,r);
					f=font_selected;
					c=color_selected;
					if (has_focus())
						draw_style_box(style_focus,r);
				} else {
					if (hover==i)
						draw_style_box(style_hover,r);
					else
						draw_style_box(style_normal,r);
					f=font_normal;
					c=color_normal;
				}

				Size2 ssize = f->get_string_size(buttons[i].text);
				if (buttons[i].icon.is_valid()) {

					ssize.x+=buttons[i].icon->get_width();
				}
				Point2 text_ofs=((r.size-ssize)/2.0+Point2(0,f->get_ascent())).floor();
				if (buttons[i].icon.is_valid()) {

					draw_texture(buttons[i].icon,r.pos+Point2(text_ofs.x,Math::floor((r.size.height-buttons[i].icon->get_height())/2.0)));
					text_ofs.x+=buttons[i].icon->get_width()+icon_sep;

				}
				draw_string(f,text_ofs+r.pos,buttons[i].text,c);
				buttons[i]._pos_cache=ofs;
				buttons[i]._size_cache=s;

				ofs+=s;
				ofs+=sep;
			}

		} break;
	}
}


void ButtonArray::_input_event(const InputEvent& p_event) {

	if (
			( (orientation==HORIZONTAL && p_event.is_action("ui_left") ) ||
			 (orientation==VERTICAL && p_event.is_action("ui_up") ) )
			&& p_event.is_pressed() && selected>0) {
			set_selected(selected-1);
			accept_event();
			emit_signal("button_selected",selected);
			return;

	}

	if (
			( (orientation==HORIZONTAL && p_event.is_action("ui_right") ) ||
			 (orientation==VERTICAL && p_event.is_action("ui_down") ) )
			&& p_event.is_pressed() && selected<(buttons.size()-1)) {
			set_selected(selected+1);
			accept_event();
			emit_signal("button_selected",selected);
			return;

	}

	if (p_event.type==InputEvent::MOUSE_BUTTON && p_event.mouse_button.pressed && p_event.mouse_button.button_index==BUTTON_LEFT) {

		int ofs = orientation==HORIZONTAL ? p_event.mouse_button.x: p_event.mouse_button.y;

		for(int i=0;i<buttons.size();i++) {

			if (ofs>=buttons[i]._pos_cache && ofs<buttons[i]._pos_cache+buttons[i]._size_cache) {

				set_selected(i);
				emit_signal("button_selected",i);
				return;
			}

		}
	}

	if (p_event.type==InputEvent::MOUSE_MOTION) {

		int ofs = orientation==HORIZONTAL ? p_event.mouse_motion.x: p_event.mouse_motion.y;
		int new_hover=-1;
		for(int i=0;i<buttons.size();i++) {

			if (ofs>=buttons[i]._pos_cache && ofs<buttons[i]._pos_cache+buttons[i]._size_cache) {

				new_hover=i;
				break;
			}

		}

		if (new_hover!=hover) {
			hover=new_hover;
			emit_signal("mouse_sub_enter");
			update();
		}
	}


}

void ButtonArray::set_align(Align p_align) {

	align=p_align;
	update();

}

ButtonArray::Align ButtonArray::get_align() const {

	return align;
}


void ButtonArray::add_button(const String& p_button) {

	Button button;
	button.text=p_button;
	buttons.push_back(button);
	update();

	if (selected==-1)
		selected=0;

	minimum_size_changed();
}

void ButtonArray::add_icon_button(const Ref<Texture>& p_icon,const String& p_button) {

	Button button;
	button.text=p_button;
	button.icon=p_icon;
	buttons.push_back(button);
	if (selected==-1)
		selected=0;

	update();

}

void ButtonArray::set_button_text(int p_button, const String& p_text) {

	ERR_FAIL_INDEX(p_button,buttons.size());
	buttons[p_button].text=p_text;
	update();
	minimum_size_changed();

}
void ButtonArray::set_button_icon(int p_button, const Ref<Texture>& p_icon) {

	ERR_FAIL_INDEX(p_button,buttons.size());
	buttons[p_button].icon=p_icon;
	update();
	minimum_size_changed();
}
String ButtonArray::get_button_text(int p_button) const {

	ERR_FAIL_INDEX_V(p_button,buttons.size(),"");
	return buttons[p_button].text;
}
Ref<Texture> ButtonArray::get_button_icon(int p_button) const {

	ERR_FAIL_INDEX_V(p_button,buttons.size(),Ref<Texture>());
	return buttons[p_button].icon;

}

int ButtonArray::get_selected() const {

	return selected;
}

int ButtonArray::get_hovered() const {

	return hover;
}

void ButtonArray::set_selected(int p_selected) {

	ERR_FAIL_INDEX(p_selected,buttons.size());
	selected=p_selected;
	update();

}

void ButtonArray::erase_button(int p_button) {

	ERR_FAIL_INDEX(p_button,buttons.size());
	buttons.remove(p_button);
	if (p_button>=selected)
		selected--;
	if (selected<0)
		selected=0;
	if (selected>=buttons.size())
		selected=buttons.size()-1;

	update();
}

void ButtonArray::clear(){

	buttons.clear();
	selected=-1;
	update();
}

int ButtonArray::get_button_count() const {

	return buttons.size();
}

void ButtonArray::get_translatable_strings(List<String> *p_strings) const {


	for(int i=0;i<buttons.size();i++)
		p_strings->push_back(buttons[i].text);
}


void ButtonArray::_bind_methods() {

	ObjectTypeDB::bind_method(_MD("add_button","text"),&ButtonArray::add_button);
	ObjectTypeDB::bind_method(_MD("add_icon_button","icon","text"),&ButtonArray::add_icon_button,DEFVAL(""));
	ObjectTypeDB::bind_method(_MD("set_button_text","button","text"),&ButtonArray::set_button_text);
	ObjectTypeDB::bind_method(_MD("set_button_icon","button","icon"),&ButtonArray::set_button_icon);
	ObjectTypeDB::bind_method(_MD("get_button_text","button"),&ButtonArray::get_button_text);
	ObjectTypeDB::bind_method(_MD("get_button_icon","button"),&ButtonArray::get_button_icon);
	ObjectTypeDB::bind_method(_MD("get_button_count"),&ButtonArray::get_button_count);
	ObjectTypeDB::bind_method(_MD("get_selected"),&ButtonArray::get_selected);
	ObjectTypeDB::bind_method(_MD("get_hovered"),&ButtonArray::get_hovered);
	ObjectTypeDB::bind_method(_MD("set_selected","button"),&ButtonArray::set_selected);
	ObjectTypeDB::bind_method(_MD("erase_button","button"),&ButtonArray::erase_button);
	ObjectTypeDB::bind_method(_MD("clear"),&ButtonArray::clear);

	ObjectTypeDB::bind_method(_MD("_input_event"),&ButtonArray::_input_event);

	BIND_CONSTANT( ALIGN_BEGIN );
	BIND_CONSTANT( ALIGN_CENTER );
	BIND_CONSTANT( ALIGN_END );
	BIND_CONSTANT( ALIGN_FILL );
	BIND_CONSTANT( ALIGN_EXPAND_FILL );

	ADD_SIGNAL( MethodInfo("button_selected",PropertyInfo(Variant::INT,"button")));

}

ButtonArray::ButtonArray(Orientation p_orientation) {

	orientation=p_orientation;
	selected=-1;
	set_focus_mode(FOCUS_ALL);
	hover=-1;
	min_button_size = -1;
}
