/*************************************************************************/
/*  item_list.cpp                                                        */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                    http://www.godotengine.org                         */
/*************************************************************************/
/* Copyright (c) 2007-2017 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 "item_list.h"
#include "os/os.h"
#include "global_config.h"


void ItemList::add_item(const String& p_item,const Ref<Texture>& p_texture,bool p_selectable) {

	Item item;
	item.icon=p_texture;
	item.icon_region=Rect2i();
	item.text=p_item;
	item.selectable=p_selectable;
	item.selected=false;
	item.disabled=false;
	item.tooltip_enabled=true;
	item.custom_bg=Color(0,0,0,0);
	items.push_back(item);

	update();
	shape_changed=true;

}

void ItemList::add_icon_item(const Ref<Texture>& p_item,bool p_selectable){

	Item item;
	item.icon=p_item;
	item.icon_region=Rect2i();
	//item.text=p_item;
	item.selectable=p_selectable;
	item.selected=false;
	item.disabled=false;
	item.tooltip_enabled=true;
	item.custom_bg=Color(0,0,0,0);
	items.push_back(item);

	update();
	shape_changed=true;

}

void ItemList::set_item_text(int p_idx,const String& p_text){

	ERR_FAIL_INDEX(p_idx,items.size());

	items[p_idx].text=p_text;
	update();
	shape_changed=true;

}

String ItemList::get_item_text(int p_idx) const{

	ERR_FAIL_INDEX_V(p_idx,items.size(),String());
	return items[p_idx].text;

}

void ItemList::set_item_tooltip_enabled(int p_idx, const bool p_enabled) {
	ERR_FAIL_INDEX(p_idx,items.size());
	items[p_idx].tooltip_enabled = p_enabled;
}

bool ItemList::is_item_tooltip_enabled(int p_idx) const {
	ERR_FAIL_INDEX_V(p_idx,items.size(), false);
	return items[p_idx].tooltip_enabled;
}

void ItemList::set_item_tooltip(int p_idx,const String& p_tooltip){

	ERR_FAIL_INDEX(p_idx,items.size());

	items[p_idx].tooltip=p_tooltip;
	update();
	shape_changed=true;

}

String ItemList::get_item_tooltip(int p_idx) const{

	ERR_FAIL_INDEX_V(p_idx,items.size(),String());
	return items[p_idx].tooltip;

}

void ItemList::set_item_icon(int p_idx,const Ref<Texture>& p_icon){

	ERR_FAIL_INDEX(p_idx,items.size());

	items[p_idx].icon=p_icon;
	update();
	shape_changed=true;


}

Ref<Texture> ItemList::get_item_icon(int p_idx) const{

	ERR_FAIL_INDEX_V(p_idx,items.size(),Ref<Texture>());

	return items[p_idx].icon;

}

void ItemList::set_item_icon_region(int p_idx,const Rect2& p_region) {

	ERR_FAIL_INDEX(p_idx,items.size());

	items[p_idx].icon_region=p_region;
	update();
	shape_changed=true;
}

Rect2 ItemList::get_item_icon_region(int p_idx) const {

	ERR_FAIL_INDEX_V(p_idx,items.size(),Rect2());

	return items[p_idx].icon_region;
}

void ItemList::set_item_custom_bg_color(int p_idx,const Color& p_custom_bg_color) {

	ERR_FAIL_INDEX(p_idx,items.size());

	items[p_idx].custom_bg=p_custom_bg_color;

}

Color ItemList::get_item_custom_bg_color(int p_idx) const {

	ERR_FAIL_INDEX_V(p_idx,items.size(),Color());

	return items[p_idx].custom_bg;

}



void ItemList::set_item_tag_icon(int p_idx,const Ref<Texture>& p_tag_icon){

	ERR_FAIL_INDEX(p_idx,items.size());

	items[p_idx].tag_icon=p_tag_icon;
	update();
	shape_changed=true;


}
Ref<Texture> ItemList::get_item_tag_icon(int p_idx) const{

	ERR_FAIL_INDEX_V(p_idx,items.size(),Ref<Texture>());

	return items[p_idx].tag_icon;

}

void ItemList::set_item_selectable(int p_idx,bool p_selectable){

	ERR_FAIL_INDEX(p_idx,items.size());

	items[p_idx].selectable=p_selectable;


}


bool ItemList::is_item_selectable(int p_idx) const{

	ERR_FAIL_INDEX_V(p_idx,items.size(),false);
	return items[p_idx].selectable;
}

void ItemList::set_item_disabled(int p_idx,bool p_disabled){

	ERR_FAIL_INDEX(p_idx,items.size());

	items[p_idx].disabled=p_disabled;
	update();

}


bool ItemList::is_item_disabled(int p_idx) const{

	ERR_FAIL_INDEX_V(p_idx,items.size(),false);
	return items[p_idx].disabled;
}


void ItemList::set_item_metadata(int p_idx,const Variant& p_metadata){

	ERR_FAIL_INDEX(p_idx,items.size());

	items[p_idx].metadata=p_metadata;
	update();
	shape_changed=true;

}

Variant ItemList::get_item_metadata(int p_idx) const{

	ERR_FAIL_INDEX_V(p_idx,items.size(),Variant());
	return items[p_idx].metadata;

}
void ItemList::select(int p_idx,bool p_single){

	ERR_FAIL_INDEX(p_idx,items.size());

	if (p_single || select_mode==SELECT_SINGLE) {

		if (!items[p_idx].selectable || items[p_idx].disabled) {
			return;
		}

		for(int i=0;i<items.size();i++) {
			items[i].selected=p_idx==i;
		}

		current=p_idx;
		ensure_selected_visible=false;
	} else {

		if (items[p_idx].selectable && !items[p_idx].disabled) {
			items[p_idx].selected=true;
		}
	}
	update();


}
void ItemList::unselect(int p_idx){

	ERR_FAIL_INDEX(p_idx,items.size());

	if (select_mode!=SELECT_MULTI) {
		items[p_idx].selected=false;
		current=-1;
	} else {
		items[p_idx].selected=false;
	}
	update();

}
bool ItemList::is_selected(int p_idx) const{

	ERR_FAIL_INDEX_V(p_idx,items.size(),false);

	return items[p_idx].selected;

}

void ItemList::set_current(int p_current) {
	ERR_FAIL_INDEX(p_current,items.size());

	if (select_mode==SELECT_SINGLE)
		select(p_current,true);
	else {
		current=p_current;
		update();
	}
}

int ItemList::get_current() const {

	return current;
}

void ItemList::move_item(int p_item,int p_to_pos) {

	ERR_FAIL_INDEX(p_item,items.size());
	ERR_FAIL_INDEX(p_to_pos,items.size()+1);

	Item it=items[p_item];
	items.remove(p_item);

	if (p_to_pos>p_item) {
		p_to_pos--;
	}

	if (p_to_pos>=items.size()) {
		items.push_back(it);
	} else {
		items.insert(p_to_pos,it);
	}

	if (current<0) {
		//do none
	} else if (p_item==current) {
		current=p_to_pos;
	} else if (p_to_pos>p_item && current>p_item && current<p_to_pos) {
		current--;
	} else if (p_to_pos<p_item && current<p_item && current>p_to_pos) {
		current++;
	}


	update();
}

int ItemList::get_item_count() const{

	return items.size();
}
void ItemList::remove_item(int p_idx){

	ERR_FAIL_INDEX(p_idx,items.size());

	items.remove(p_idx);
	update();
	shape_changed=true;
	defer_select_single=-1;


}

void ItemList::clear(){

	items.clear();
	current=-1;
	ensure_selected_visible=false;
	update();
	shape_changed=true;
	defer_select_single=-1;

}

void ItemList::set_fixed_column_width(int p_size){

	ERR_FAIL_COND(p_size<0);
	fixed_column_width=p_size;
	update();
	shape_changed=true;

}
int ItemList::get_fixed_column_width() const{

	return fixed_column_width;
}

void ItemList::set_same_column_width(bool p_enable){

	same_column_width=p_enable;
	update();
	shape_changed=true;

}
int ItemList::is_same_column_width() const{

	return same_column_width;
}

void ItemList::set_max_text_lines(int p_lines){

	ERR_FAIL_COND(p_lines<1);
	max_text_lines=p_lines;
	update();
	shape_changed=true;

}
int ItemList::get_max_text_lines() const{

	return max_text_lines;
}

void ItemList::set_max_columns(int p_amount){

	ERR_FAIL_COND(p_amount<0);
	max_columns=p_amount;
	update();
}
int ItemList::get_max_columns() const{

	return max_columns;
}

void ItemList::set_select_mode(SelectMode p_mode) {

	select_mode=p_mode;
	update();
}

ItemList::SelectMode ItemList::get_select_mode() const {

	return select_mode;
}

void ItemList::set_icon_mode(IconMode p_mode){

	icon_mode=p_mode;
	update();
	shape_changed=true;

}
ItemList::IconMode ItemList::get_icon_mode() const{

	return icon_mode;
}


void ItemList::set_fixed_icon_size(const Size2& p_size) {

	fixed_icon_size=p_size;
	update();
}

Size2 ItemList::get_fixed_icon_size() const {

	return fixed_icon_size;
}
Size2 ItemList::Item::get_icon_size() const {

	if (icon.is_null())
		return Size2();
	if (icon_region.has_no_area())
		return icon->get_size();

	return icon_region.size;
}

void ItemList::_gui_input(const InputEvent& p_event) {

	if (defer_select_single>=0 && p_event.type==InputEvent::MOUSE_MOTION) {
		defer_select_single=-1;
		return;
	}

	if (defer_select_single>=0 && p_event.type==InputEvent::MOUSE_BUTTON && p_event.mouse_button.button_index==BUTTON_LEFT && !p_event.mouse_button.pressed) {

		select(defer_select_single,true);


		emit_signal("multi_selected",defer_select_single,true);
		defer_select_single=-1;
		return;
	}

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

		const InputEventMouseButton &mb = p_event.mouse_button;

		search_string=""; //any mousepress cancels
		Vector2 pos(mb.x,mb.y);
		Ref<StyleBox> bg = get_stylebox("bg");
		pos-=bg->get_offset();
		pos.y+=scroll_bar->get_value();

		int closest = -1;

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

			Rect2 rc = items[i].rect_cache;
			if (i%current_columns==current_columns-1) {
				rc.size.width=get_size().width; //not right but works
			}

			if (rc.has_point(pos)) {
				closest=i;
				break;
			}
		}

		if (closest!=-1) {

			int i = closest;

			if (select_mode==SELECT_MULTI && items[i].selected && mb.mod.command) {
				unselect(i);
				emit_signal("multi_selected",i,false);

			} else if (select_mode==SELECT_MULTI && mb.mod.shift && current>=0 && current<items.size() && current!=i) {

				int from = current;
				int to = i;
				if (i<current) {
					SWAP(from,to);
				}
				for(int j=from;j<=to;j++) {
					bool selected = !items[j].selected;
					select(j,false);
					if (selected)
						emit_signal("multi_selected",i,true);
				}

				if (p_event.mouse_button.button_index==BUTTON_RIGHT) {

					emit_signal("item_rmb_selected",i,Vector2(mb.x,mb.y));
				}
			} else {

				if (!mb.doubleclick && !mb.mod.command && select_mode==SELECT_MULTI && items[i].selectable && !items[i].disabled && items[i].selected && p_event.mouse_button.button_index==BUTTON_LEFT) {
					defer_select_single=i;
					return;
				}

				if (items[i].selected && p_event.mouse_button.button_index==BUTTON_RIGHT) {

					emit_signal("item_rmb_selected",i,Vector2(mb.x,mb.y));
				} else {
					bool selected = !items[i].selected;


					select(i,select_mode==SELECT_SINGLE || !mb.mod.command);

					if (selected) {
						if (select_mode==SELECT_SINGLE) {
							emit_signal("item_selected",i);
						} else
							emit_signal("multi_selected",i,true);


					}

					if (p_event.mouse_button.button_index==BUTTON_RIGHT) {

						emit_signal("item_rmb_selected",i,Vector2(mb.x,mb.y));
					} else if (/*select_mode==SELECT_SINGLE &&*/ mb.doubleclick) {

						emit_signal("item_activated",i);

					}
				}
			}


			return;
		} else {
			Vector<int> sItems = get_selected_items();
			for(int i = 0; i < sItems.size(); i++) {
				unselect(sItems[i]);
			}
		}
	}
	if (p_event.type==InputEvent::MOUSE_BUTTON && p_event.mouse_button.button_index==BUTTON_WHEEL_UP && p_event.mouse_button.pressed) {

		scroll_bar->set_value( scroll_bar->get_value()-scroll_bar->get_page()/8 );

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

		scroll_bar->set_value( scroll_bar->get_value()+scroll_bar->get_page()/8 );

	}

	if (p_event.is_pressed() && items.size()>0) {
		if (p_event.is_action("ui_up")) {

			if (search_string!="") {

				uint64_t now = OS::get_singleton()->get_ticks_msec();
				uint64_t diff = now-search_time_msec;

				if (diff<int(GlobalConfig::get_singleton()->get("gui/timers/incremental_search_max_interval_msec"))*2) {

					for(int i=current-1;i>=0;i--) {

						if (items[i].text.begins_with(search_string)) {

							set_current(i);
							ensure_current_is_visible();
							if (select_mode==SELECT_SINGLE) {
								emit_signal("item_selected",current);
							}


							break;
						}
					}
					accept_event();
					return;
				}
			}

			if (current>=current_columns) {
				set_current(current-current_columns);
				ensure_current_is_visible();
				if (select_mode==SELECT_SINGLE) {
					emit_signal("item_selected",current);
				}
				accept_event();
			}
		} else if (p_event.is_action("ui_down")) {

			if (search_string!="") {

				uint64_t now = OS::get_singleton()->get_ticks_msec();
				uint64_t diff = now-search_time_msec;

				if (diff<int(GlobalConfig::get_singleton()->get("gui/timers/incremental_search_max_interval_msec"))*2) {

					for(int i=current+1;i<items.size();i++) {

						if (items[i].text.begins_with(search_string)) {

							set_current(i);
							ensure_current_is_visible();
							if (select_mode==SELECT_SINGLE) {
								emit_signal("item_selected",current);
							}
							break;
						}
					}
					accept_event();
					return;
				}
			}

			if (current<items.size()-current_columns) {
				set_current(current+current_columns);
				ensure_current_is_visible();
				if (select_mode==SELECT_SINGLE) {
					emit_signal("item_selected",current);
				}
				accept_event();

			}
		} else if (p_event.is_action("ui_page_up")) {

			search_string=""; //any mousepress cancels

			for(int i=4;i>0;i--) {
				if (current-current_columns*i >=0 ) {
					set_current( current- current_columns*i);
					ensure_current_is_visible();
					if (select_mode==SELECT_SINGLE) {
						emit_signal("item_selected",current);
					}
					accept_event();
					break;
				}
			}
		} else if (p_event.is_action("ui_page_down")) {

			search_string=""; //any mousepress cancels

			for(int i=4;i>0;i--) {
				if (current+current_columns*i < items.size() ) {
					set_current( current+ current_columns*i);
					ensure_current_is_visible();
					if (select_mode==SELECT_SINGLE) {
						emit_signal("item_selected",current);
					}
					accept_event();

					break;
				}
			}
		} else if (p_event.is_action("ui_left")) {

			search_string=""; //any mousepress cancels

			if (current%current_columns!=0) {
				set_current(current-1);
				ensure_current_is_visible();
				if (select_mode==SELECT_SINGLE) {
					emit_signal("item_selected",current);
				}
				accept_event();

			}
		} else if (p_event.is_action("ui_right")) {

			search_string=""; //any mousepress cancels

			if (current%current_columns!=(current_columns-1)) {
				set_current(current+1);
				ensure_current_is_visible();
				if (select_mode==SELECT_SINGLE) {
					emit_signal("item_selected",current);
				}
				accept_event();

			}
		} else if (p_event.is_action("ui_cancel")) {
			search_string="";
		} else if (p_event.is_action("ui_select")) {


			if (select_mode==SELECT_MULTI && current>=0 && current<items.size()) {
				if (items[current].selectable && !items[current].disabled && !items[current].selected) {
					select(current,false);
					emit_signal("multi_selected",current,true);
				} else if (items[current].selected) {
					unselect(current);
					emit_signal("multi_selected",current,false);
				}
			}
		} else if (p_event.is_action("ui_accept")) {
			search_string=""; //any mousepress cance

			if (current>=0 && current<items.size()) {
				emit_signal("item_activated",current);
			}
		} else if (p_event.type==InputEvent::KEY) {

			if (p_event.key.unicode) {

				uint64_t now = OS::get_singleton()->get_ticks_msec();
				uint64_t diff = now-search_time_msec;
				uint64_t max_interval = uint64_t(GLOBAL_DEF("gui/timers/incremental_search_max_interval_msec",2000));
				search_time_msec = now;

				if (diff>max_interval) {
					search_string="";
				}

				search_string+=String::chr(p_event.key.unicode);
				for(int i=0;i<items.size();i++) {
					if (items[i].text.begins_with(search_string)) {
						set_current(i);
						ensure_current_is_visible();
						if (select_mode==SELECT_SINGLE) {
							emit_signal("item_selected",current);
						}
						break;
					}
				}

			}

		}
	}




}

void ItemList::ensure_current_is_visible() {

	ensure_selected_visible=true;
	update();
}

static Rect2 _adjust_to_max_size(Size2 p_size, Size2 p_max_size) {

	Size2 size=p_max_size;
	int tex_width = p_size.width * size.height / p_size.height;
	int tex_height = size.height;

	if (tex_width>size.width) {
		tex_width=size.width;
		tex_height=p_size.height * tex_width / p_size.width;
	}

	int ofs_x=(size.width - tex_width)/2;
	int ofs_y=(size.height - tex_height)/2;

	return Rect2(ofs_x,ofs_y,tex_width,tex_height);


}

void ItemList::_notification(int p_what) {

	if (p_what==NOTIFICATION_RESIZED) {
		shape_changed=true;
		update();
	}

	if (p_what==NOTIFICATION_DRAW) {

		Ref<StyleBox> bg = get_stylebox("bg");

		int mw = scroll_bar->get_minimum_size().x;
		scroll_bar->set_anchor_and_margin(MARGIN_LEFT,ANCHOR_END,mw+bg->get_margin(MARGIN_RIGHT));
		scroll_bar->set_anchor_and_margin(MARGIN_RIGHT,ANCHOR_END,bg->get_margin(MARGIN_RIGHT));
		scroll_bar->set_anchor_and_margin(MARGIN_TOP,ANCHOR_BEGIN,bg->get_margin(MARGIN_TOP));
		scroll_bar->set_anchor_and_margin(MARGIN_BOTTOM,ANCHOR_END,bg->get_margin(MARGIN_BOTTOM));


		Size2 size = get_size();

		float page = size.height-bg->get_minimum_size().height;
		int width = size.width-bg->get_minimum_size().width;
		if (scroll_bar->is_visible()){
			width-=mw+bg->get_margin(MARGIN_RIGHT);
		}
		scroll_bar->set_page(page);

		draw_style_box(bg,Rect2(Point2(),size));

		int hseparation = get_constant("hseparation");
		int vseparation = get_constant("vseparation");
		int icon_margin = get_constant("icon_margin");
		int line_separation = get_constant("line_separation");

		Ref<StyleBox> sbsel = has_focus()?get_stylebox("selected_focus"):get_stylebox("selected");
		Ref<StyleBox> cursor = has_focus()?get_stylebox("cursor"):get_stylebox("cursor_unfocused");

		Ref<Font> font = get_font("font");
		Color guide_color = get_color("guide_color");
		Color font_color = get_color("font_color");
		Color font_color_selected = get_color("font_color_selected");
		int font_height = font->get_height();
		Vector<int> line_size_cache;
		Vector<int> line_limit_cache;

		if (max_text_lines) {
			line_size_cache.resize(max_text_lines);
			line_limit_cache.resize(max_text_lines);
		}

		if (has_focus()) {
			VisualServer::get_singleton()->canvas_item_add_clip_ignore(get_canvas_item(),true);
			draw_style_box(get_stylebox("bg_focus"),Rect2(Point2(),size));
			VisualServer::get_singleton()->canvas_item_add_clip_ignore(get_canvas_item(),false);
		}

		if (shape_changed) {

			float max_column_width = 0;

			//1- compute item minimum sizes
			for(int i=0;i<items.size();i++) {

				Size2 minsize;
				if (items[i].icon.is_valid()) {

					if (fixed_icon_size.x>0 && fixed_icon_size.y>0) {
						minsize=fixed_icon_size* icon_scale;
					} else {
						minsize=items[i].get_icon_size() *icon_scale;
					}

					if (items[i].text!="") {
						if (icon_mode==ICON_MODE_TOP) {
							minsize.y+=icon_margin;
						} else {
							minsize.x+=icon_margin;
						}
					}
				}

				if (items[i].text!="") {

					Size2 s = font->get_string_size(items[i].text);
					//s.width=MIN(s.width,fixed_column_width);



					if (icon_mode==ICON_MODE_TOP) {
						minsize.x=MAX(minsize.x,s.width);
						if (max_text_lines>0) {
							minsize.y+=(font_height+line_separation)*max_text_lines;
						} else {
							minsize.y+=s.height;
						}

					} else {
						minsize.y=MAX(minsize.y,s.height);
						minsize.x+=s.width;
					}
				}


				if (fixed_column_width>0)
					minsize.x=fixed_column_width;
				max_column_width=MAX(max_column_width,minsize.x);
				items[i].rect_cache.size=minsize;
				items[i].min_rect_cache.size=minsize;

			}

			int fit_size = size.x - bg->get_minimum_size().width - mw;

			//2-attempt best fit
			current_columns = 0x7FFFFFFF;
			if (max_columns>0)
				current_columns=max_columns;


			while(true) {
				//repeat util all fits
				//print_line("try with "+itos(current_columns));
				bool all_fit=true;
				Vector2 ofs;
				int col=0;
				int max_h=0;
				separators.clear();
				for(int i=0;i<items.size();i++) {

					if (current_columns>1 && items[i].rect_cache.size.width+ofs.x > fit_size) {
						//went past
						current_columns=MAX(col,1);
						all_fit=false;
						break;
					}

					items[i].rect_cache=items[i].min_rect_cache;
					if(same_column_width)
						items[i].rect_cache.size.x=max_column_width;
					items[i].rect_cache.pos=ofs;
					max_h=MAX(max_h,items[i].rect_cache.size.y);
					ofs.x+=items[i].rect_cache.size.x + hseparation;
					//print_line("item "+itos(i)+" ofs "+rtos(items[i].rect_cache.size.x));
					col++;
					if (col==current_columns) {

						if (i<items.size()-1)
							separators.push_back(ofs.y+max_h+vseparation/2);

						for(int j=i;j>=0 && col>0;j--, col--) {
							items[j].rect_cache.size.y = max_h;
						}

						ofs.x=0;
						ofs.y+=max_h+vseparation;
						col=0;
						max_h=0;
					}
				}

				for(int j=items.size()-1;j>=0 && col>0;j--, col--) {
					items[j].rect_cache.size.y = max_h;
				}

				if (all_fit) {
					float max = MAX(page,ofs.y+max_h);
					scroll_bar->set_max(max);
					//print_line("max: "+rtos(max)+" page "+rtos(page));
					if (max<=page) {
						scroll_bar->set_value(0);
						scroll_bar->hide();
					} else {
						scroll_bar->show();
					}
					break;
				}
			}


			shape_changed=false;
		}

		//ensure_selected_visible needs to be checked before we draw the list.
		if (ensure_selected_visible && current>=0 && current <=items.size()) {

			Rect2 r = items[current].rect_cache;
			int from = scroll_bar->get_value();
			int to = from + scroll_bar->get_page();

			if (r.pos.y < from) {
				scroll_bar->set_value(r.pos.y);
			} else if (r.pos.y+r.size.y > to) {
				scroll_bar->set_value(r.pos.y+r.size.y - (to-from));
			}


		}

		ensure_selected_visible=false;		

		Vector2 base_ofs = bg->get_offset();
		base_ofs.y-=int(scroll_bar->get_value());

		Rect2 clip(Point2(),size-bg->get_minimum_size()+Vector2(0,scroll_bar->get_value()));

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


			Rect2 rcache = items[i].rect_cache;

			if (!clip.intersects(rcache))
				continue;


			if (current_columns==1) {
				rcache.size.width = width-rcache.pos.x;
			}

			Rect2 r=rcache;
			r.pos+=base_ofs;

			// Use stylebox to dimension potential bg color, even if not selected
			r.pos.x-=sbsel->get_margin(MARGIN_LEFT);
			r.size.x+=sbsel->get_margin(MARGIN_LEFT)+sbsel->get_margin(MARGIN_RIGHT);
			r.pos.y-=sbsel->get_margin(MARGIN_TOP);
			r.size.y+=sbsel->get_margin(MARGIN_TOP)+sbsel->get_margin(MARGIN_BOTTOM);

			if (items[i].selected) {
				draw_style_box(sbsel,r);
			}
			if (items[i].custom_bg.a>0.001) {
				r.pos.x+=2;
				r.size.x-=4;
				r.pos.y+=2;
				r.size.y-=4;
				draw_rect(r,items[i].custom_bg);
			}


			Vector2 text_ofs;
			if (items[i].icon.is_valid()) {

				Size2 icon_size;
				//= _adjust_to_max_size(items[i].get_icon_size(),fixed_icon_size) * icon_scale;

				if (fixed_icon_size.x>0 && fixed_icon_size.y>0) {
					icon_size=fixed_icon_size* icon_scale;
				} else {
					icon_size=items[i].get_icon_size() *icon_scale;

				}

				Vector2 icon_ofs;

				Point2 pos = items[i].rect_cache.pos + icon_ofs + base_ofs;

				if (icon_mode==ICON_MODE_TOP) {

					pos.x += Math::floor((items[i].rect_cache.size.width - icon_size.width)/2);
					pos.y += MIN(
						Math::floor((items[i].rect_cache.size.height - icon_size.height)/2),
						items[i].rect_cache.size.height - items[i].min_rect_cache.size.height
					);
					text_ofs.y = icon_size.height + icon_margin;
					text_ofs.y += items[i].rect_cache.size.height - items[i].min_rect_cache.size.height;
				} else {

					pos.y += Math::floor((items[i].rect_cache.size.height - icon_size.height)/2);
					text_ofs.x = icon_size.width + icon_margin;
				}

				Rect2 draw_rect=Rect2(pos,icon_size);

				if (fixed_icon_size.x>0 && fixed_icon_size.y>0) {
					Rect2 adj = _adjust_to_max_size(items[i].get_icon_size() * icon_scale,icon_size);
					draw_rect.pos+=adj.pos;
					draw_rect.size=adj.size;
				}

				Color modulate=Color(1,1,1,1);
				if (items[i].disabled)
					modulate.a*=0.5;

				if (items[i].icon_region.has_no_area())
					draw_texture_rect(items[i].icon, draw_rect,false,modulate );
				else
					draw_texture_rect_region(items[i].icon, draw_rect, items[i].icon_region,modulate);

			}

			if (items[i].tag_icon.is_valid()) {

				draw_texture(items[i].tag_icon,items[i].rect_cache.pos+base_ofs);
			}

			if (items[i].text!="") {

				int max_len=-1;

				Vector2 size = font->get_string_size(items[i].text);
				if (fixed_column_width)
					max_len=fixed_column_width;
				else if(same_column_width)
					max_len=items[i].rect_cache.size.x;
				else
					max_len=size.x;

				Color modulate=items[i].selected?font_color_selected:font_color;
				if (items[i].disabled)
					modulate.a*=0.5;

				if (icon_mode==ICON_MODE_TOP && max_text_lines>0) {

					int ss = items[i].text.length();
					float ofs=0;
					int line=0;
					for(int j=0;j<=ss;j++) {

						int cs = j<ss?font->get_char_size(items[i].text[j],items[i].text[j+1]).x:0;
						if (ofs+cs>max_len || j==ss) {
							line_limit_cache[line]=j;
							line_size_cache[line]=ofs;
							line++;
							ofs=0;
							if (line>=max_text_lines)
								break;
						} else {
							ofs+=cs;
						}

					}

					line=0;
					ofs=0;

					text_ofs.y+=font->get_ascent();
					text_ofs=text_ofs.floor();
					text_ofs+=base_ofs;
					text_ofs+=items[i].rect_cache.pos;

					for(int j=0;j<ss;j++) {

						if (j==line_limit_cache[line]) {
							line++;
							ofs=0;
							if (line>=max_text_lines)
								break;
						}
						ofs+=font->draw_char(get_canvas_item(),text_ofs+Vector2(ofs+(max_len-line_size_cache[line])/2,line*(font_height+line_separation)).floor(),items[i].text[j],items[i].text[j+1],modulate);
					}

					//special multiline mode
				} else {

					if (fixed_column_width>0)
						size.x=MIN(size.x,fixed_column_width);

					if (icon_mode==ICON_MODE_TOP) {
						text_ofs.x+=(items[i].rect_cache.size.width-size.x)/2;
					} else {
						text_ofs.y+=(items[i].rect_cache.size.height-size.y)/2;
					}

					text_ofs.y+=font->get_ascent();
					text_ofs=text_ofs.floor();
					text_ofs+=base_ofs;
					text_ofs+=items[i].rect_cache.pos;

					draw_string(font,text_ofs,items[i].text,modulate,max_len+1);
				}


			}

			if (select_mode==SELECT_MULTI && i==current) {

				Rect2 r=rcache;
				r.pos+=base_ofs;
				draw_style_box(cursor,r);

			}
		}

		for(int i=0;i<separators.size();i++) {
			draw_line(Vector2(bg->get_margin(MARGIN_LEFT),base_ofs.y+separators[i]),Vector2(size.width-bg->get_margin(MARGIN_LEFT),base_ofs.y+separators[i]),guide_color);
		}
	}
}

void ItemList::_scroll_changed(double) {
	update();
}

int ItemList::get_item_at_pos(const Point2& p_pos, bool p_exact) const {

	Vector2 pos=p_pos;
	Ref<StyleBox> bg = get_stylebox("bg");
	pos-=bg->get_offset();
	pos.y+=scroll_bar->get_value();

	int closest = -1;
	int closest_dist=0x7FFFFFFF;

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

		Rect2 rc = items[i].rect_cache;
		if (i%current_columns==current_columns-1) {
			rc.size.width=get_size().width; //not right but works
		}

		if (rc.has_point(pos)) {
			closest=i;
			break;
		}

		float dist = rc.distance_to(pos);
		if (!p_exact && dist<closest_dist) {
			closest=i;
			closest_dist=dist;
		}
	}

	return closest;
}

bool ItemList::is_pos_at_end_of_items(const Point2& p_pos) const {

	if (items.empty())
		return true;

	Vector2 pos=p_pos;
	Ref<StyleBox> bg = get_stylebox("bg");
	pos-=bg->get_offset();
	pos.y+=scroll_bar->get_value();

	Rect2 endrect = items[items.size()-1].rect_cache;
	return (pos.y > endrect.pos.y + endrect.size.y);

}


String ItemList::get_tooltip(const Point2& p_pos) const {

	int closest = get_item_at_pos(p_pos);

	if (closest!=-1) {
		if (!items[closest].tooltip_enabled) {
			return "";
		}
		if (items[closest].tooltip!="") {
			return items[closest].tooltip;
		}
		if (items[closest].text!="") {
			return items[closest].text;
		}
	}

	return Control::get_tooltip(p_pos);
}

void ItemList::sort_items_by_text() {

	items.sort();
	update();
	shape_changed=true;

	if (select_mode==SELECT_SINGLE) {
		for(int i=0;i<items.size();i++) {
			if (items[i].selected) {
				select(i);
				return;
			}
		}
	}
}

int ItemList::find_metadata(const Variant& p_metadata) const {

	for(int i=0;i<items.size();i++) {
		if (items[i].metadata==p_metadata) {
			return i;
		}
	}

	return -1;

}


void ItemList::set_allow_rmb_select(bool p_allow) {
	allow_rmb_select=p_allow;
}

bool ItemList::get_allow_rmb_select() const {

	return allow_rmb_select;
}

void ItemList::set_icon_scale(real_t p_scale) {
	icon_scale = p_scale;
}

real_t ItemList::get_icon_scale() const {
	return icon_scale;
}

Vector<int> ItemList::get_selected_items() {
	Vector<int> selected;
	for (int i = 0; i < items.size(); i++) {
		if (items[i].selected) {
			selected.push_back(i);
			if (this->select_mode == SELECT_SINGLE) {
				break;
			}
		}
	}
	return selected;
}

void ItemList::_bind_methods(){

	ClassDB::bind_method(D_METHOD("add_item","text","icon:Texture","selectable"),&ItemList::add_item,DEFVAL(Variant()),DEFVAL(true));
	ClassDB::bind_method(D_METHOD("add_icon_item","icon:Texture","selectable"),&ItemList::add_icon_item,DEFVAL(true));

	ClassDB::bind_method(D_METHOD("set_item_text","idx","text"),&ItemList::set_item_text);
	ClassDB::bind_method(D_METHOD("get_item_text","idx"),&ItemList::get_item_text);

	ClassDB::bind_method(D_METHOD("set_item_icon","idx","icon:Texture"),&ItemList::set_item_icon);
	ClassDB::bind_method(D_METHOD("get_item_icon:Texture","idx"),&ItemList::get_item_icon);

	ClassDB::bind_method(D_METHOD("set_item_icon_region","idx","rect"),&ItemList::set_item_icon_region);
	ClassDB::bind_method(D_METHOD("get_item_icon_region","idx"),&ItemList::get_item_icon_region);

	ClassDB::bind_method(D_METHOD("set_item_selectable","idx","selectable"),&ItemList::set_item_selectable);
	ClassDB::bind_method(D_METHOD("is_item_selectable","idx"),&ItemList::is_item_selectable);

	ClassDB::bind_method(D_METHOD("set_item_disabled","idx","disabled"),&ItemList::set_item_disabled);
	ClassDB::bind_method(D_METHOD("is_item_disabled","idx"),&ItemList::is_item_disabled);

	ClassDB::bind_method(D_METHOD("set_item_metadata","idx","metadata"),&ItemList::set_item_metadata);
	ClassDB::bind_method(D_METHOD("get_item_metadata","idx"),&ItemList::get_item_metadata);

	ClassDB::bind_method(D_METHOD("set_item_custom_bg_color","idx","custom_bg_color"),&ItemList::set_item_custom_bg_color);
	ClassDB::bind_method(D_METHOD("get_item_custom_bg_color","idx"),&ItemList::get_item_custom_bg_color);

	ClassDB::bind_method(D_METHOD("set_item_tooltip_enabled","idx","enable"),&ItemList::set_item_tooltip_enabled);
	ClassDB::bind_method(D_METHOD("is_item_tooltip_enabled","idx"),&ItemList::is_item_tooltip_enabled);

	ClassDB::bind_method(D_METHOD("set_item_tooltip","idx","tooltip"),&ItemList::set_item_tooltip);
	ClassDB::bind_method(D_METHOD("get_item_tooltip","idx"),&ItemList::get_item_tooltip);

	ClassDB::bind_method(D_METHOD("select","idx","single"),&ItemList::select,DEFVAL(true));
	ClassDB::bind_method(D_METHOD("unselect","idx"),&ItemList::unselect);
	ClassDB::bind_method(D_METHOD("is_selected","idx"),&ItemList::is_selected);
	ClassDB::bind_method(D_METHOD("get_selected_items"),&ItemList::get_selected_items);

	ClassDB::bind_method(D_METHOD("get_item_count"),&ItemList::get_item_count);
	ClassDB::bind_method(D_METHOD("remove_item","idx"),&ItemList::remove_item);

	ClassDB::bind_method(D_METHOD("clear"),&ItemList::clear);
	ClassDB::bind_method(D_METHOD("sort_items_by_text"),&ItemList::sort_items_by_text);

	ClassDB::bind_method(D_METHOD("set_fixed_column_width","width"),&ItemList::set_fixed_column_width);
	ClassDB::bind_method(D_METHOD("get_fixed_column_width"),&ItemList::get_fixed_column_width);

	ClassDB::bind_method(D_METHOD("set_same_column_width","enable"),&ItemList::set_same_column_width);
	ClassDB::bind_method(D_METHOD("is_same_column_width"),&ItemList::is_same_column_width);

	ClassDB::bind_method(D_METHOD("set_max_text_lines","lines"),&ItemList::set_max_text_lines);
	ClassDB::bind_method(D_METHOD("get_max_text_lines"),&ItemList::get_max_text_lines);

	ClassDB::bind_method(D_METHOD("set_max_columns","amount"),&ItemList::set_max_columns);
	ClassDB::bind_method(D_METHOD("get_max_columns"),&ItemList::get_max_columns);

	ClassDB::bind_method(D_METHOD("set_select_mode","mode"),&ItemList::set_select_mode);
	ClassDB::bind_method(D_METHOD("get_select_mode"),&ItemList::get_select_mode);

	ClassDB::bind_method(D_METHOD("set_icon_mode","mode"),&ItemList::set_icon_mode);
	ClassDB::bind_method(D_METHOD("get_icon_mode"),&ItemList::get_icon_mode);


	ClassDB::bind_method(D_METHOD("set_fixed_icon_size","size"),&ItemList::set_fixed_icon_size);
	ClassDB::bind_method(D_METHOD("get_fixed_icon_size"),&ItemList::get_fixed_icon_size);

	ClassDB::bind_method(D_METHOD("set_icon_scale","scale"),&ItemList::set_icon_scale);
	ClassDB::bind_method(D_METHOD("get_icon_scale"),&ItemList::get_icon_scale);

	ClassDB::bind_method(D_METHOD("set_allow_rmb_select","allow"),&ItemList::set_allow_rmb_select);
	ClassDB::bind_method(D_METHOD("get_allow_rmb_select"),&ItemList::get_allow_rmb_select);

	ClassDB::bind_method(D_METHOD("get_item_at_pos","pos","exact"),&ItemList::get_item_at_pos,DEFVAL(false));

	ClassDB::bind_method(D_METHOD("ensure_current_is_visible"),&ItemList::ensure_current_is_visible);

	ClassDB::bind_method(D_METHOD("get_v_scroll"),&ItemList::get_v_scroll);

	ClassDB::bind_method(D_METHOD("_scroll_changed"),&ItemList::_scroll_changed);
	ClassDB::bind_method(D_METHOD("_gui_input"),&ItemList::_gui_input);

	BIND_CONSTANT( ICON_MODE_TOP );
	BIND_CONSTANT( ICON_MODE_LEFT );
	BIND_CONSTANT( SELECT_SINGLE );
	BIND_CONSTANT( SELECT_MULTI );

	ADD_SIGNAL( MethodInfo("item_selected",PropertyInfo(Variant::INT,"index")));
	ADD_SIGNAL( MethodInfo("item_rmb_selected",PropertyInfo(Variant::INT,"index"),PropertyInfo(Variant::VECTOR2,"atpos")));
	ADD_SIGNAL( MethodInfo("multi_selected",PropertyInfo(Variant::INT,"index"),PropertyInfo(Variant::BOOL,"selected")));
	ADD_SIGNAL( MethodInfo("item_activated",PropertyInfo(Variant::INT,"index")));

	GLOBAL_DEF("gui/timers/incremental_search_max_interval_msec",2000);
}

ItemList::ItemList() {

	current=-1;

	select_mode=SELECT_SINGLE;
	icon_mode=ICON_MODE_LEFT;

	fixed_column_width=0;
	same_column_width = false;
	max_text_lines=1;
	max_columns=1;

	scroll_bar = memnew( VScrollBar );
	add_child(scroll_bar);

	shape_changed=true;
	scroll_bar->connect("value_changed",this,"_scroll_changed");

	set_focus_mode(FOCUS_ALL);
	current_columns=1;
	search_time_msec=0;
	ensure_selected_visible=false;
	defer_select_single=-1;
	allow_rmb_select=false;

	icon_scale = 1.0f;
	set_clip_contents(true);
}

ItemList::~ItemList() {

}