/*
 * Copyright (c) 1997 - 2001 Hansjörg Malthaner
 *
 * This file is part of the Simutrans project under the artistic licence.
 * (see licence.txt)
 */

/*
 * [Mathew Hounsell] Min Size Button On Map Window 20030313
 */

#include <string>
#include <stdio.h>
#include <cmath>

#include "minimap.h"
#include "map_frame.h"

#include "simwin.h"
#include "../simsys.h"

#include "../simworld.h"
#include "../display/simgraph.h"
#include "../display/viewport.h"
#include "../simcolor.h"
#include "../bauer/fabrikbauer.h"
#include "../bauer/goods_manager.h"
#include "../dataobj/environment.h"
#include "../dataobj/translator.h"
#include "../dataobj/koord.h"
#include "../dataobj/loadsave.h"
#include "../descriptor/factory_desc.h"
#include "../simfab.h"
#include "../player/finance.h"

static koord old_ij=koord::invalid;

karte_ptr_t map_frame_t::welt;

scr_size map_frame_t::window_size;
bool  map_frame_t::legend_visible=false;
bool  map_frame_t::scale_visible=false;
bool  map_frame_t::directory_visible=false;
bool  map_frame_t::is_cursor_hidden=false;
bool  map_frame_t::filter_factory_list=true;

// Hajo: we track our position onscreen
scr_coord map_frame_t::screenpos;

/**
 * Scroll-container of map. Hack: size calculations of minimap_t are intertwined with map_frame_t.
 */
class gui_scrollpane_map_t : public gui_scrollpane_t
{
public:
	gui_scrollpane_map_t(gui_component_t *comp) : gui_scrollpane_t(comp) {}

	scr_size get_max_size() const OVERRIDE { return scr_size::inf;}
};

/**
 * Entries in factory legend: show color indicator + name
 */
class legend_entry_t : public gui_component_t
{
	gui_label_t label;
	PIXVAL color;
public:
	legend_entry_t(const char* text, PIXVAL c) : label(text), color(c) {}

	scr_size get_min_size() const OVERRIDE
	{
		return  label.get_min_size() + scr_size(D_INDICATOR_BOX_WIDTH + D_H_SPACE, 0);
	}

	scr_size get_max_size() const OVERRIDE
	{
		return scr_size( scr_size::inf.w, label.get_max_size().h );
	}

	void draw(scr_coord offset) OVERRIDE
	{
		scr_coord pos = get_pos() + offset;
		display_fillbox_wh_clip_rgb(pos.x, pos.y + D_GET_CENTER_ALIGN_OFFSET(D_INDICATOR_BOX_HEIGHT,LINESPACE), D_INDICATOR_BOX_WIDTH, D_INDICATOR_BOX_HEIGHT, color, false);
		label.draw(pos + scr_size(D_INDICATOR_BOX_WIDTH + D_H_SPACE, 0));
	}
};

/**
 * Show scale of severity-MAX_SEVERITY_COLORS
 */
class gui_scale_t : public gui_component_t
{
public:
	void draw(scr_coord offset) OVERRIDE
	{
		scr_coord pos = get_pos() + offset;
		double bar_width = (double)get_size().w/(double)MAX_SEVERITY_COLORS;
		// color bar
		for(  int i=0;  i<MAX_SEVERITY_COLORS;  i++  ) {
			display_fillbox_wh_clip_rgb(pos.x + (i*bar_width), pos.y+2,  bar_width+1, 7, minimap_t::calc_severity_color(i, MAX_SEVERITY_COLORS-1), false);
		}
	}
	scr_size get_min_size() const OVERRIDE
	{
		return scr_size(0, 9);
	}
	scr_size get_max_size() const OVERRIDE
	{
		return scr_size( scr_size::inf.w, 9);
	}
};

typedef struct {
	PIXVAL color;
	PIXVAL select_color;
	const char *button_text;
	const char *tooltip_text;
	minimap_t::MAP_DISPLAY_MODE mode;
} map_button_t;


map_button_t button_init[MAP_MAX_BUTTONS] = {
	{ COL_LIGHT_GREEN,  COL_DARK_GREEN,  "Towns", "Overlay town names", minimap_t::MAP_TOWN },
	{ COL_LIGHT_GREEN,  COL_DARK_GREEN,  "CityLimit", "Overlay city limits", minimap_t::MAP_CITYLIMIT },
	{ COL_WHITE,        COL_GREY5,       "Buildings", "Show level of city buildings", minimap_t::MAP_LEVEL },
	{ COL_LIGHT_GREEN,  COL_DARK_GREEN,  "PaxDest", "Overlay passenger destinations when a town window is open", minimap_t::MAP_PAX_DEST },
	{ COL_LIGHT_GREEN,  COL_DARK_GREEN,  "Tourists", "Highlite tourist attraction", minimap_t::MAP_TOURIST },
	{ COL_LIGHT_GREEN,  COL_DARK_GREEN,  "Factories", "Highlite factories", minimap_t::MAP_FACTORIES },
	{ COL_LIGHT_YELLOW, COL_DARK_YELLOW, "Passagiere", "Show passenger coverage/passenger network", minimap_t::MAP_PASSENGER },
	{ COL_LIGHT_YELLOW, COL_DARK_YELLOW, "Post", "Show mail service coverage/mail network", minimap_t::MAP_MAIL },
	{ COL_LIGHT_YELLOW, COL_DARK_YELLOW, "Fracht", "Show transported freight/freight network", minimap_t::MAP_FREIGHT },
	{ COL_LIGHT_PURPLE, COL_DARK_PURPLE, "Status", "Show capacity and if halt is overcrowded", minimap_t::MAP_STATUS },
	{ COL_LIGHT_PURPLE, COL_DARK_PURPLE, "hl_btn_sort_waiting", "Show how many people/much is waiting at halts", minimap_t::MAP_WAITING },
	{ COL_LIGHT_PURPLE, COL_DARK_PURPLE, "Queueing", "Show the change of waiting at halts", minimap_t::MAP_WAITCHANGE },
	{ COL_LIGHT_PURPLE, COL_DARK_PURPLE, "Service", "Show how many convoi reach a station", minimap_t::MAP_SERVICE },
	{ COL_LIGHT_PURPLE, COL_DARK_PURPLE, "Transfers", "Sum of departure/arrivals at halts", minimap_t::MAP_TRANSFER },
	{ COL_LIGHT_PURPLE, COL_DARK_PURPLE, "Origin", "Show initial passenger departure", minimap_t::MAP_ORIGIN },
	{ COL_WHITE,        COL_GREY5,       "Traffic", "Show usage of network", minimap_t::MAP_TRAFFIC },
	{ COL_WHITE,        COL_GREY5,       "Speedlimit", "Show speedlimit of ways", minimap_t::MAX_SPEEDLIMIT },
	{ COL_WHITE,        COL_GREY5,       "Tracks", "Highlight railroad tracks", minimap_t::MAP_TRACKS },
	{ COL_LIGHT_GREEN,  COL_DARK_GREEN,  "Depots", "Highlite depots", minimap_t::MAP_DEPOT },
	{ COL_WHITE,        COL_GREY5,       "Powerlines", "Highlite electrical transmission lines", minimap_t::MAP_POWERLINES },
	{ COL_WHITE,        COL_GREY5,       "Forest", "Highlite forests", minimap_t::MAP_FOREST },
	{ COL_WHITE,        COL_GREY5,       "Ownership", "Show the owenership of infrastructure", minimap_t::MAP_OWNER }
};

#define scrolly (*p_scrolly)

map_frame_t::map_frame_t() :
	gui_frame_t( translator::translate("Reliefkarte") )
{
	// init statics
	old_ij = koord::invalid;
	is_dragging = false;
	zoomed = false;

	// init map
	minimap_t *karte = minimap_t::get_instance();
	karte->init();
	karte->set_display_mode( ( minimap_t::MAP_DISPLAY_MODE)env_t::default_mapmode );
	// show all players by default
	karte->player_showed_on_map = -1;

	p_scrolly = new gui_scrollpane_map_t( minimap_t::get_instance());
	// initialize scrollbar positions -- LATER
	const scr_size size = karte->get_size();
	const scr_size s_size=scrolly.get_size();
	const koord ij = welt->get_viewport()->get_world_position();
	const scr_size win_size = size-s_size; // this is the visible area

	scrolly.set_scroll_position(  max(0,min(ij.x-win_size.w/2,size.w)), max(0, min(ij.y-win_size.h/2,size.h)) );
	scrolly.set_focusable( true );
	scrolly.set_scrollbar_mode(scrollbar_t::show_always);


	set_table_layout(1,0);

	// first row of controls
	add_table(3,1);
	{
		// first row of controls
		// selections button
		b_show_legend.init(button_t::roundbox_state, "Show legend");
		b_show_legend.set_tooltip("Shows buttons on special topics.");
		b_show_legend.add_listener(this);
		add_component(&b_show_legend);

		// industry list button
		b_show_directory.init(button_t::roundbox_state, "Show industry");
		b_show_directory.set_tooltip("Shows a listing with all industries on the map.");
		b_show_directory.add_listener(this);
		add_component(&b_show_directory);

		// scale button
		b_show_scale.init(button_t::roundbox_state, "Show map scale");
		b_show_scale.set_tooltip("Shows the color code for several selections.");
		b_show_scale.add_listener(this);
		add_component(&b_show_scale);
	}
	end_table();


	// second row of controls
	zoom_row = add_table(6,0);
	{
		// zoom levels label
		new_component<gui_label_t>("map zoom");

		// zoom levels arrow left
		zoom_buttons[0].init(button_t::repeatarrowleft, NULL);
		zoom_buttons[0].add_listener( this );
		add_component( zoom_buttons+0 );

		// zoom level value label
		zoom_value_label.buf().append("1:1");
		zoom_value_label.update();
		add_component( &zoom_value_label );

		// zoom levels arrow right
		zoom_buttons[1].init(button_t::repeatarrowright, NULL);
		zoom_buttons[1].add_listener( this );
		add_component( zoom_buttons+1 );

		// rotate map 45° (isometric view)
		b_rotate45.init( button_t::square_state, "isometric map");
		b_rotate45.set_tooltip("Similar view as the main window");
		b_rotate45.add_listener(this);
		b_rotate45.pressed = karte->is_isometric();
		add_component(&b_rotate45);

		new_component<gui_fill_t>();
	}
	end_table();

	// filter container
	filter_container.set_visible(false);
	add_component(&filter_container);
	filter_container.set_table_layout(1,0);

	filter_container.add_table(5,0);
	// insert selections: show networks, in filter container
	b_overlay_networks.init(button_t::square_state, "Networks");
	b_overlay_networks.set_tooltip("Overlay schedules/network");
	b_overlay_networks.add_listener(this);
	b_overlay_networks.pressed = (env_t::default_mapmode & minimap_t::MAP_LINES)!=0;
	filter_container.add_component( &b_overlay_networks );

	// player combo for network overlay
	viewed_player_c.new_component<gui_scrolled_list_t::const_text_scrollitem_t>(translator::translate("All"), SYSCOL_TEXT);
	viewable_players[ 0 ] = -1;
	for(  int np = 0, count = 1;  np < MAX_PLAYER_COUNT;  np++  ) {
		if(  welt->get_player( np )  &&  welt->get_player( np )->get_finance()->has_convoi()) {
			viewed_player_c.new_component<gui_scrolled_list_t::const_text_scrollitem_t>(welt->get_player( np )->get_name(), color_idx_to_rgb(welt->get_player( np )->get_player_color1()+4));
			viewable_players[ count++ ] = np;
		}
	}
	viewed_player_c.set_selection(0);
	viewed_player_c.set_focusable( true );
	viewed_player_c.add_listener( this );
	filter_container.add_component(&viewed_player_c);

	// freight combo for network overlay
	freight_type_c.set_pos( scr_coord(2*D_BUTTON_WIDTH+3*D_H_SPACE, 0) );
	freight_type_c.set_size( scr_size(D_BUTTON_WIDTH,D_BUTTON_HEIGHT) );
	freight_type_c.set_max_size( scr_size( 116, 5 * D_BUTTON_HEIGHT) );
	{
		viewable_freight_types.append(NULL);
		freight_type_c.new_component<gui_scrolled_list_t::const_text_scrollitem_t>( translator::translate("All"), SYSCOL_TEXT) ;
		viewable_freight_types.append(goods_manager_t::passengers);
		freight_type_c.new_component<gui_scrolled_list_t::const_text_scrollitem_t>( translator::translate("Passagiere"), SYSCOL_TEXT) ;
		viewable_freight_types.append(goods_manager_t::mail);
		freight_type_c.new_component<gui_scrolled_list_t::const_text_scrollitem_t>( translator::translate("Post"), SYSCOL_TEXT) ;
		viewable_freight_types.append(goods_manager_t::none); // for all freight ...
		freight_type_c.new_component<gui_scrolled_list_t::const_text_scrollitem_t>( translator::translate("Fracht"), SYSCOL_TEXT) ;
		for(  int i = 0;  i < goods_manager_t::get_max_catg_index();  i++  ) {
			const goods_desc_t *freight_type = goods_manager_t::get_info_catg(i);
			const int index = freight_type->get_catg_index();
			if(  index == goods_manager_t::INDEX_NONE  ||  freight_type->get_catg()==0  ) {
				continue;
			}
			freight_type_c.new_component<gui_scrolled_list_t::const_text_scrollitem_t>(translator::translate(freight_type->get_catg_name()), SYSCOL_TEXT);
			viewable_freight_types.append(freight_type);
		}
		for(  int i=0;  i < goods_manager_t::get_count();  i++  ) {
			const goods_desc_t *ware = goods_manager_t::get_info(i);
			if(  ware->get_catg() == 0  &&  ware->get_index() > 2  ) {
				// Special freight: Each good is special
				viewable_freight_types.append(ware);
				freight_type_c.new_component<gui_scrolled_list_t::const_text_scrollitem_t>( translator::translate(ware->get_name()), SYSCOL_TEXT) ;
			}
		}
	}
	freight_type_c.set_selection(0);
	minimap_t::get_instance()->freight_type_group_index_showed_on_map = NULL;
	freight_type_c.set_focusable( true );
	freight_type_c.add_listener( this );
	filter_container.add_component(&freight_type_c);

	// mode of transport combo for network overlay
	for (int i = 0; i < simline_t::MAX_LINE_TYPE; i++) {
		transport_type_c.new_component<gui_scrolled_list_t::const_text_scrollitem_t>(simline_t::get_linetype_name((simline_t::linetype)i), SYSCOL_TEXT);
	}
	transport_type_c.set_selection(0);
	minimap_t::get_instance()->transport_type_showed_on_map = simline_t::line;
	transport_type_c.set_focusable( true );
	transport_type_c.add_listener( this );
	filter_container.add_component(&transport_type_c);

	b_overlay_networks_load_factor.init(button_t::square_state, "Free Capacity");
	b_overlay_networks_load_factor.set_tooltip("Color according to transport capacity left");
	b_overlay_networks_load_factor.add_listener(this);
	b_overlay_networks_load_factor.pressed = 0;
	minimap_t::get_instance()->show_network_load_factor = 0;
	filter_container.add_component( &b_overlay_networks_load_factor );
	filter_container.end_table();

	filter_container.add_table(5,0)->set_force_equal_columns(true);
	// insert filter buttons in legend container
	for (int index=0; index<MAP_MAX_BUTTONS; index++) {
		filter_buttons[index].init( button_t::box_state | button_t::flexible, button_init[index].button_text);
		filter_buttons[index].text_color = SYSCOL_TEXT;
		filter_buttons[index].set_tooltip( button_init[index].tooltip_text );
		filter_buttons[index].add_listener(this);
		filter_container.add_component(filter_buttons + index);
	}
	filter_container.end_table();
	update_buttons();

	// directory container
	directory_container.set_table_layout(4,0);
	directory_container.set_visible(false);
	add_component(&directory_container);

	// factory list: show used button
	b_filter_factory_list.init(button_t::square_state, "Show only used");
	b_filter_factory_list.set_tooltip("In the industry legend show only currently existing factories");
	b_filter_factory_list.add_listener(this);
	directory_container.add_component( &b_filter_factory_list, 4 );
	update_factory_legend();

	// scale container
	scale_container.set_table_layout(3,0);
	scale_container.set_visible(false);
	add_component(&scale_container);
	scale_container.new_component<gui_label_t>("min");
	scale_container.new_component<gui_scale_t>();
	scale_container.new_component<gui_label_t>("max");

	// map scrolly
	scrolly.set_show_scroll_x(true);
	scrolly.set_scroll_discrete_y(false);
	take_component(p_scrolly);

	// restore window size and options
	show_hide_legend( legend_visible );
	show_hide_scale( scale_visible );
	show_hide_directory( directory_visible );

	reset_min_windowsize();
	set_windowsize( window_size );
	set_resizemode(diagonal_resize);
}


void map_frame_t::update_buttons()
{
	for(  int i=0;  i<MAP_MAX_BUTTONS;  i++  ) {
		filter_buttons[i].pressed = (button_init[i].mode&env_t::default_mapmode)!=0;
		filter_buttons[i].background_color = color_idx_to_rgb(filter_buttons[i].pressed ? button_init[i].select_color : button_init[i].color);
	}
}


void map_frame_t::update_factory_legend()
{
	directory_container.remove_all();
	directory_container.add_component( &b_filter_factory_list, 4 );

	if(  directory_visible  ) {
		vector_tpl<const factory_desc_t*> factory_types;
		// generate list of factory types
		if(  filter_factory_list  ) {
			FOR(slist_tpl<fabrik_t*>, const f, welt->get_fab_list()) {
				if(  f->get_desc()->get_distribution_weight() > 0  ) {
					factory_types.append_unique(f->get_desc());
				}
			}
		}
		else {
			FOR(stringhashtable_tpl<factory_desc_t const*>, i, factory_builder_t::get_factory_table()) {
				factory_desc_t const* const d = i.value;
				if (d->get_distribution_weight() > 0) {
					factory_types.append_unique(d);
				}
			}
		}
		// add corresponding legend entries
		FOR(vector_tpl<const factory_desc_t*>, f, factory_types) {
			directory_container.new_component<legend_entry_t>(f->get_name(), f->get_color());
		}
	}
}


void map_frame_t::show_hide_legend(const bool show)
{
	filter_container.set_visible(show);
	b_show_legend.pressed = show;
	legend_visible = show;
	reset_min_windowsize();
}


void map_frame_t::show_hide_scale(const bool show)
{
	scale_container.set_visible(show);
	b_show_scale.pressed = show;
	scale_visible = show;
	reset_min_windowsize();
}


void map_frame_t::show_hide_directory(const bool show)
{
	directory_container.set_visible(show);
	b_show_directory.pressed = show;
	b_filter_factory_list.pressed = filter_factory_list;
	directory_visible = show;
	update_factory_legend();
	reset_min_windowsize();
}


bool map_frame_t::action_triggered( gui_action_creator_t *comp, value_t)
{
	if(  comp == &b_show_legend  ) {
		show_hide_legend( !b_show_legend.pressed );
	}
	else if(  comp == &b_show_scale  ) {
		show_hide_scale( !b_show_scale.pressed );
	}
	else if(  comp == &b_show_directory  ) {
		show_hide_directory( !b_show_directory.pressed );
	}
	else if (  comp == &b_filter_factory_list  ) {
		filter_factory_list = !filter_factory_list;
		show_hide_directory( b_show_directory.pressed );
	}
	else if(  comp == zoom_buttons+1  ) {
		// zoom out
		zoom(true);
	}
	else if(  comp == zoom_buttons+0  ) {
		// zoom in
		zoom(false);
	}
	else if(  comp == &b_rotate45  ) {
		// rotated/straight map
		minimap_t::get_instance()->toggle_isometric();
		minimap_t::get_instance()->calc_map_size();
		b_rotate45.pressed = minimap_t::get_instance()->is_isometric();
		scrolly.set_size( scrolly.get_size() );
	}
	else if(  comp == &b_overlay_networks  ) {
		b_overlay_networks.pressed ^= 1;
		if(  b_overlay_networks.pressed  ) {
			env_t::default_mapmode |= minimap_t::MAP_LINES;
		}
		else {
			env_t::default_mapmode &= ~minimap_t::MAP_LINES;
		}
		minimap_t::get_instance()->set_display_mode(  ( minimap_t::MAP_DISPLAY_MODE)env_t::default_mapmode  );
	}
	else if (  comp == &viewed_player_c  ) {
		minimap_t::get_instance()->player_showed_on_map = viewable_players[viewed_player_c.get_selection()];
		minimap_t::get_instance()->invalidate_map_lines_cache();
	}
	else if (  comp == &transport_type_c  ) {
		minimap_t::get_instance()->transport_type_showed_on_map = transport_type_c.get_selection();
		minimap_t::get_instance()->invalidate_map_lines_cache();
	}
	else if (  comp == &freight_type_c  ) {
		minimap_t::get_instance()->freight_type_group_index_showed_on_map = viewable_freight_types[freight_type_c.get_selection()];
		minimap_t::get_instance()->invalidate_map_lines_cache();
	}
	else if (  comp == &b_overlay_networks_load_factor  ) {
		minimap_t::get_instance()->show_network_load_factor = !minimap_t::get_instance()->show_network_load_factor;
		b_overlay_networks_load_factor.pressed = !b_overlay_networks_load_factor.pressed;
		minimap_t::get_instance()->invalidate_map_lines_cache();
	}
	else {
		for(  int i=0;  i<MAP_MAX_BUTTONS;  i++  ) {
			if(  comp == filter_buttons+i  ) {
				if(  filter_buttons[i].pressed  ) {
					env_t::default_mapmode &= ~button_init[i].mode;
				}
				else {
					if(  (button_init[i].mode & minimap_t::MAP_MODE_FLAGS) == 0  ) {
						// clear all persistent states
						env_t::default_mapmode &= minimap_t::MAP_MODE_FLAGS;
					}
					else if(  button_init[i].mode & minimap_t::MAP_MODE_HALT_FLAGS  ) {
						// clear all other halt states
						env_t::default_mapmode &= ~minimap_t::MAP_MODE_HALT_FLAGS;
					}
					env_t::default_mapmode |= button_init[i].mode;
				}
				filter_buttons[i].pressed ^= 1;
				break;
			}
		}
		minimap_t::get_instance()->set_display_mode(  ( minimap_t::MAP_DISPLAY_MODE)env_t::default_mapmode  );
		update_buttons();
	}
	return true;
}


void map_frame_t::zoom(bool magnify)
{
	if ( minimap_t::get_instance()->change_zoom_factor(magnify)) {
		zoomed = true;

		// update zoom factors and zoom label
		sint16 zoom_in, zoom_out;
		minimap_t::get_instance()->get_zoom_factors(zoom_out, zoom_in);
		zoom_value_label.buf().printf("%i:%i", zoom_in, zoom_out );
		zoom_value_label.update();
		zoom_row->set_size( zoom_row->get_size());
	}
}


/**
 * Events werden hiermit an die GUI-components
 * gemeldet
 * @author Hj. Malthaner
 */
bool map_frame_t::infowin_event(const event_t *ev)
{
	event_t ev2 = *ev;
	translate_event(&ev2, -scrolly.get_pos().x, -scrolly.get_pos().y-D_TITLEBAR_HEIGHT);

	if(ev->ev_class == INFOWIN) {
		if(ev->ev_code == WIN_OPEN) {
			minimap_t::get_instance()->set_xy_offset_size( scr_coord(0,0), scr_size(0,0) );
		}
		else if(ev->ev_code == WIN_CLOSE) {
			minimap_t::get_instance()->is_visible = false;
		}
	}

	if(  minimap_t::get_instance()->getroffen(ev2.mx,ev2.my)  ) {
		set_focus( minimap_t::get_instance() );
	}

	if(  (IS_WHEELUP(ev) || IS_WHEELDOWN(ev))  &&  minimap_t::get_instance()->getroffen(ev2.mx,ev2.my)  ) {
		// otherwise these would go to the vertical scroll bar
		zoom(IS_WHEELUP(ev));
		return true;
	}

	// Hajo: hack: minimap can resize upon right click
	// we track this here, and adjust size.
	if(  IS_RIGHTCLICK(ev)  ) {
		is_dragging = false;
		display_show_pointer(false);
		is_cursor_hidden = true;
		return true;
	}
	else if(  IS_RIGHTRELEASE(ev)  ) {
		is_dragging = false;
		display_show_pointer(true);
		is_cursor_hidden = false;
		return true;
	}
	else if(  IS_RIGHTDRAG(ev)  &&  ( minimap_t::get_instance()->getroffen(ev2.mx,ev2.my)  ||  minimap_t::get_instance()->getroffen(ev2.cx,ev2.cy))  ) {
		int x = scrolly.get_scroll_x();
		int y = scrolly.get_scroll_y();
		const int scroll_direction = ( env_t::scroll_multi>0 ? 1 : -1 );

		x += (ev->mx - ev->cx)*scroll_direction*2;
		y += (ev->my - ev->cy)*scroll_direction*2;

		is_dragging = true;

		scrolly.set_scroll_position(  max(0, x),  max(0, y) );

		// Move the mouse pointer back to starting location
		// To prevent a infinite mouse event loop, we just do it when needed.
		if ((ev->mx - ev->cx)!=0  ||  (ev->my-ev->cy)!=0) {
			move_pointer(screenpos.x + ev->cx, screenpos.y+ev->cy);
		}

		return true;
	}
	else if(  IS_LEFTDBLCLK(ev)  &&  minimap_t::get_instance()->getroffen(ev2.mx,ev2.my)  ) {
		// re-center cursor by scrolling
		koord ij = welt->get_viewport()->get_world_position();
		scr_coord center = minimap_t::get_instance()->map_to_screen_coord(ij);
		const scr_size s_size = scrolly.get_size();

		scrolly.set_scroll_position(max(0,center.x-(s_size.w/2)), max(0,center.y-(s_size.h/2)));
		zoomed = false;

		// remember world position, we do not want to have surprises when scrolling later on
		old_ij = ij;
		return true;
	}
	else if(  IS_RIGHTDBLCLK(ev)  ) {
		// zoom to fit window
		do { // first, zoom all the way in
			zoomed = false;
			zoom(true);
		} while(  zoomed  );

		// then zoom back out to fit
		const scr_size s_size = scrolly.get_size() - D_SCROLLBAR_SIZE;
		scr_size size = minimap_t::get_instance()->get_size();
		zoomed = true;
		while(  zoomed  &&  max(size.w/s_size.w, size.h/s_size.h)  ) {
			zoom(false);
			size = minimap_t::get_instance()->get_size();
		}
		return true;
	}
	else if(  is_cursor_hidden  ) {
		display_show_pointer(true);
		is_cursor_hidden = false;
	}

	return gui_frame_t::infowin_event(ev);
}


/**
 * size window in response and save it in static size
 * @author (Mathew Hounsell)
 * @date   11-Mar-2003
 */
void map_frame_t::set_windowsize(scr_size size)
{
	gui_frame_t::set_windowsize( size );
	window_size = get_windowsize();
}


/**
 * Draw new component. The values to be passed refer to the window
 * i.e. It's the screen coordinates of the window where the
 * component is displayed.
 * @author Hj. Malthaner
 */
void map_frame_t::draw(scr_coord pos, scr_size size)
{
	// update our stored screen position
	screenpos = pos;
	minimap_t::get_instance()->set_xy_offset_size( scr_coord(scrolly.get_scroll_x(), scrolly.get_scroll_y()), scrolly.get_client().get_size() );

	// first: check if cursor within map screen size
	koord ij = welt->get_viewport()->get_world_position();
	if(welt->is_within_limits(ij)) {
		scr_coord center = minimap_t::get_instance()->map_to_screen_coord(ij);
		// only re-center if zoomed or world position has changed and its outside visible area
		const scr_size size = scrolly.get_size();
		if(zoomed  ||  ( old_ij != ij  &&
				( scrolly.get_scroll_x()>center.x  ||  scrolly.get_scroll_x()+size.w<=center.x  ||
				  scrolly.get_scroll_y()>center.y  ||  scrolly.get_scroll_y()+size.h<=center.y ) ) ) {
				// re-center cursor by scrolling
				scrolly.set_scroll_position( max(0,center.x-(size.w/2)), max(0,center.y-(size.h/2)) );
				zoomed = false;
		}
		// remember world position, we do not want to have surprises when scrolling later on
		old_ij = ij;
	}

	// draw all child controls
	gui_frame_t::draw(pos, size);

	// may add compass
	if(  skinverwaltung_t::compass_map  &&  env_t::compass_map_position!=0  ) {
		const uint16 isometric_img_offset = minimap_t::get_instance()->is_isometric() ? 4 : 0;
		display_img_aligned( skinverwaltung_t::compass_map->get_image_id( isometric_img_offset+welt->get_settings().get_rotation() ),
							 scrolly.get_client()+pos+scr_coord(4,4+D_TITLEBAR_HEIGHT)-scr_size(8,8), env_t::compass_map_position, false );
	}
}


void map_frame_t::rdwr( loadsave_t *file )
{
	file->rdwr_bool( legend_visible );
	file->rdwr_bool( scale_visible );
	file->rdwr_bool( directory_visible );
	file->rdwr_long( env_t::default_mapmode );

	file->rdwr_bool( b_overlay_networks_load_factor.pressed );

	minimap_t::get_instance()->rdwr(file);

	window_size.rdwr(file);
	scrolly.rdwr(file);

	viewed_player_c.rdwr(file);
	transport_type_c.rdwr(file);
	freight_type_c.rdwr(file);

	if(  file->is_loading()  ) {
		set_windowsize( window_size );
		// notify minimap of new settings
		minimap_t::get_instance()->calc_map_size();
		scrolly.set_size( scrolly.get_size() );

		minimap_t::get_instance()->set_display_mode(( minimap_t::MAP_DISPLAY_MODE)env_t::default_mapmode);
		update_buttons();

		show_hide_directory(directory_visible);
		show_hide_legend(legend_visible);
		show_hide_scale(scale_visible);

		b_overlay_networks.pressed = (env_t::default_mapmode & minimap_t::MAP_LINES)!=0;

		minimap_t::get_instance()->player_showed_on_map = viewable_players[viewed_player_c.get_selection()];
		minimap_t::get_instance()->transport_type_showed_on_map = transport_type_c.get_selection();
		minimap_t::get_instance()->freight_type_group_index_showed_on_map = viewable_freight_types[freight_type_c.get_selection()];
		minimap_t::get_instance()->show_network_load_factor = b_overlay_networks_load_factor.pressed;
		minimap_t::get_instance()->invalidate_map_lines_cache();
	}
}
