src/settings_gui.cpp
branchnoai
changeset 10645 8cbdb511a674
parent 10513 33cb70ff2f5d
child 10715 6bdf79ffb022
--- a/src/settings_gui.cpp	Mon May 19 14:14:33 2008 +0000
+++ b/src/settings_gui.cpp	Mon May 19 15:13:58 2008 +0000
@@ -20,7 +20,6 @@
 #include "strings_func.h"
 #include "functions.h"
 #include "window_func.h"
-#include "vehicle_base.h"
 #include "core/alloc_func.hpp"
 #include "string_func.h"
 #include "gfx_func.h"
@@ -102,17 +101,6 @@
 	return i;
 }
 
-static inline bool RoadVehiclesAreBuilt()
-{
-	const Vehicle* v;
-
-	FOR_ALL_VEHICLES(v) {
-		if (v->type == VEH_ROAD) return true;
-	}
-	return false;
-}
-
-
 enum GameOptionsWidgets {
 	GAMEOPT_CURRENCY_BTN    =  4,
 	GAMEOPT_DISTANCE_BTN    =  6,
@@ -151,199 +139,178 @@
 	ShowDropDownList(w, list, sel, GAMEOPT_TOWNNAME_BTN);
 }
 
-/**
- * Update/redraw the languages dropdown
- * @param w   the window the dropdown belongs to
- */
-static void ShowLangDropdown(Window *w)
-{
-	typedef std::map<StringID, int, StringIDCompare> LangList;
-
-	/* Sort language names */
-	LangList langs;
-	for (int i = 0; i < _dynlang.num; i++) langs[SPECSTR_LANGUAGE_START + i] = i;
-
-	DropDownList *list = new DropDownList();
-	for (LangList::iterator it = langs.begin(); it != langs.end(); it++) {
-		list->push_back(new DropDownListStringItem((*it).first, (*it).second, false));
-	}
-
-	ShowDropDownList(w, list, _dynlang.curr, GAMEOPT_LANG_BTN);
-}
-
 static void ShowCustCurrency();
 
-static void GameOptionsWndProc(Window *w, WindowEvent *e)
-{
-	switch (e->event) {
-		case WE_PAINT: {
-			int i;
-			StringID str = STR_02BE_DEFAULT;
-
-			w->SetWidgetDisabledState(GAMEOPT_VEHICLENAME_SAVE, !(_vehicle_design_names & 1));
-			if (!w->IsWidgetDisabled(GAMEOPT_VEHICLENAME_SAVE)) str = STR_02BF_CUSTOM;
-			SetDParam(0, str);
-			SetDParam(1, _currency_specs[_opt_ptr->currency].name);
-			SetDParam(2, STR_UNITS_IMPERIAL + _opt_ptr->units);
-			SetDParam(3, STR_02E9_DRIVE_ON_LEFT + _opt_ptr->road_side);
-			SetDParam(4, TownName(_opt_ptr->town_name));
-			SetDParam(5, _autosave_dropdown[_opt_ptr->autosave]);
-			SetDParam(6, SPECSTR_LANGUAGE_START + _dynlang.curr);
-			i = GetCurRes();
-			SetDParam(7, i == _num_resolutions ? STR_RES_OTHER : SPECSTR_RESOLUTION_START + i);
-			SetDParam(8, SPECSTR_SCREENSHOT_START + _cur_screenshot_format);
-			w->SetWidgetLoweredState(GAMEOPT_FULLSCREEN, _fullscreen);
-
-			DrawWindowWidgets(w);
-			DrawString(20, 175, STR_OPTIONS_FULLSCREEN, TC_FROMSTRING); // fullscreen
-		} break;
-
-		case WE_CLICK:
-			switch (e->we.click.widget) {
-				case GAMEOPT_CURRENCY_BTN: /* Setup currencies dropdown */
-					ShowDropDownMenu(w, BuildCurrencyDropdown(), _opt_ptr->currency, GAMEOPT_CURRENCY_BTN, _game_mode == GM_MENU ? 0 : ~GetMaskOfAllowedCurrencies(), 0);
-					break;
-
-				case GAMEOPT_DISTANCE_BTN: /* Setup distance unit dropdown */
-					ShowDropDownMenu(w, _units_dropdown, _opt_ptr->units, GAMEOPT_DISTANCE_BTN, 0, 0);
-					break;
-
-				case GAMEOPT_ROADSIDE_BTN: { /* Setup road-side dropdown */
-					int i = 0;
-
-					/* You can only change the drive side if you are in the menu or ingame with
-					 * no vehicles present. In a networking game only the server can change it */
-					if ((_game_mode != GM_MENU && RoadVehiclesAreBuilt()) || (_networking && !_network_server))
-						i = (-1) ^ (1 << _opt_ptr->road_side); // disable the other value
-
-					ShowDropDownMenu(w, _driveside_dropdown, _opt_ptr->road_side, GAMEOPT_ROADSIDE_BTN, i, 0);
-				} break;
-
-				case GAMEOPT_TOWNNAME_BTN: /* Setup townname dropdown */
-					ShowTownnameDropdown(w, _opt_ptr->town_name);
-					break;
-
-				case GAMEOPT_AUTOSAVE_BTN: /* Setup autosave dropdown */
-					ShowDropDownMenu(w, _autosave_dropdown, _opt_ptr->autosave, GAMEOPT_AUTOSAVE_BTN, 0, 0);
-					break;
-
-				case GAMEOPT_VEHICLENAME_BTN: /* Setup customized vehicle-names dropdown */
-					ShowDropDownMenu(w, _designnames_dropdown, (_vehicle_design_names & 1) ? 1 : 0, GAMEOPT_VEHICLENAME_BTN, (_vehicle_design_names & 2) ? 0 : 2, 0);
-					break;
-
-				case GAMEOPT_VEHICLENAME_SAVE: /* Save customized vehicle-names to disk */
-					break;  // not implemented
-
-				case GAMEOPT_LANG_BTN: /* Setup interface language dropdown */
-					ShowLangDropdown(w);
-					break;
-
-				case GAMEOPT_RESOLUTION_BTN: /* Setup resolution dropdown */
-					ShowDropDownMenu(w, BuildDynamicDropdown(SPECSTR_RESOLUTION_START, _num_resolutions), GetCurRes(), GAMEOPT_RESOLUTION_BTN, 0, 0);
-					break;
-
-				case GAMEOPT_FULLSCREEN: /* Click fullscreen on/off */
-					/* try to toggle full-screen on/off */
-					if (!ToggleFullScreen(!_fullscreen)) {
-						ShowErrorMessage(INVALID_STRING_ID, STR_FULLSCREEN_FAILED, 0, 0);
-					}
-					w->SetWidgetLoweredState(GAMEOPT_FULLSCREEN, _fullscreen);
-					w->SetDirty();
-					break;
-
-				case GAMEOPT_SCREENSHOT_BTN: /* Setup screenshot format dropdown */
-					ShowDropDownMenu(w, BuildDynamicDropdown(SPECSTR_SCREENSHOT_START, _num_screenshot_formats), _cur_screenshot_format, GAMEOPT_SCREENSHOT_BTN, 0, 0);
-					break;
-			}
-			break;
-
-		case WE_DROPDOWN_SELECT:
-			switch (e->we.dropdown.button) {
-				case GAMEOPT_VEHICLENAME_BTN: /* Vehicle design names */
-					if (e->we.dropdown.index == 0) {
-						DeleteCustomEngineNames();
-						MarkWholeScreenDirty();
-					} else if (!(_vehicle_design_names & 1)) {
-						LoadCustomEngineNames();
-						MarkWholeScreenDirty();
-					}
-					break;
-
-				case GAMEOPT_CURRENCY_BTN: /* Currency */
-					if (e->we.dropdown.index == CUSTOM_CURRENCY_ID) ShowCustCurrency();
-					_opt_ptr->currency = e->we.dropdown.index;
-					MarkWholeScreenDirty();
-					break;
-
-				case GAMEOPT_DISTANCE_BTN: /* Measuring units */
-					_opt_ptr->units = e->we.dropdown.index;
-					MarkWholeScreenDirty();
-					break;
-
-				case GAMEOPT_ROADSIDE_BTN: /* Road side */
-					if (_opt_ptr->road_side != e->we.dropdown.index) { // only change if setting changed
-						DoCommandP(0, e->we.dropdown.index, 0, NULL, CMD_SET_ROAD_DRIVE_SIDE | CMD_MSG(STR_00B4_CAN_T_DO_THIS));
-						MarkWholeScreenDirty();
-					}
-					break;
-
-				case GAMEOPT_TOWNNAME_BTN: /* Town names */
-					if (_game_mode == GM_MENU) {
-						_opt_ptr->town_name = e->we.dropdown.index;
-						InvalidateWindow(WC_GAME_OPTIONS, 0);
-					}
-					break;
-
-				case GAMEOPT_AUTOSAVE_BTN: /* Autosave options */
-					_opt.autosave = _opt_newgame.autosave = e->we.dropdown.index;
-					w->SetDirty();
-					break;
-
-				case GAMEOPT_LANG_BTN: /* Change interface language */
-					ReadLanguagePack(e->we.dropdown.index);
-					CheckForMissingGlyphsInLoadedLanguagePack();
-					UpdateAllStationVirtCoord();
-					UpdateAllWaypointSigns();
-					MarkWholeScreenDirty();
-					break;
-
-				case GAMEOPT_RESOLUTION_BTN: /* Change resolution */
-					if (e->we.dropdown.index < _num_resolutions && ChangeResInGame(_resolutions[e->we.dropdown.index][0], _resolutions[e->we.dropdown.index][1]))
-						w->SetDirty();
-					break;
-
-				case GAMEOPT_SCREENSHOT_BTN: /* Change screenshot format */
-					SetScreenshotFormat(e->we.dropdown.index);
-					w->SetDirty();
-					break;
-			}
-			break;
-
-		case WE_DESTROY:
-			DeleteWindowById(WC_CUSTOM_CURRENCY, 0);
-			break;
+struct GameOptionsWindow : Window {
+	GameOptionsWindow(const WindowDesc *desc) : Window(desc)
+	{
+		this->FindWindowPlacementAndResize(desc);
 	}
 
-}
+	~GameOptionsWindow()
+	{
+		DeleteWindowById(WC_CUSTOM_CURRENCY, 0);
+	}
 
-/** Change the side of the road vehicles drive on (server only).
- * @param tile unused
- * @param flags operation to perform
- * @param p1 the side of the road; 0 = left side and 1 = right side
- * @param p2 unused
- */
-CommandCost CmdSetRoadDriveSide(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
-{
-	/* Check boundaries and you can only change this if NO vehicles have been built yet,
-	 * except in the intro-menu where of course it's always possible to do so. */
-	if (p1 > 1 || (_game_mode != GM_MENU && RoadVehiclesAreBuilt())) return CMD_ERROR;
+	virtual void OnPaint()
+	{
+		StringID str = STR_02BE_DEFAULT;
 
-	if (flags & DC_EXEC) {
-		_opt_ptr->road_side = p1;
-		InvalidateWindow(WC_GAME_OPTIONS, 0);
+		this->SetWidgetDisabledState(GAMEOPT_VEHICLENAME_SAVE, !(_vehicle_design_names & 1));
+		if (!this->IsWidgetDisabled(GAMEOPT_VEHICLENAME_SAVE)) str = STR_02BF_CUSTOM;
+		SetDParam(0, str);
+		SetDParam(1, _currency_specs[_opt_ptr->currency].name);
+		SetDParam(2, STR_UNITS_IMPERIAL + _opt_ptr->units);
+		SetDParam(3, STR_02E9_DRIVE_ON_LEFT + _opt_ptr->road_side);
+		SetDParam(4, TownName(_opt_ptr->town_name));
+		SetDParam(5, _autosave_dropdown[_opt_ptr->autosave]);
+		SetDParam(6, SPECSTR_LANGUAGE_START + _dynlang.curr);
+		int i = GetCurRes();
+		SetDParam(7, i == _num_resolutions ? STR_RES_OTHER : SPECSTR_RESOLUTION_START + i);
+		SetDParam(8, SPECSTR_SCREENSHOT_START + _cur_screenshot_format);
+		this->SetWidgetLoweredState(GAMEOPT_FULLSCREEN, _fullscreen);
+
+		this->DrawWidgets();
+		DrawString(20, 175, STR_OPTIONS_FULLSCREEN, TC_FROMSTRING); // fullscreen
 	}
-	return CommandCost();
-}
+
+	virtual void OnClick(Point pt, int widget)
+	{
+		switch (widget) {
+			case GAMEOPT_CURRENCY_BTN: // Setup currencies dropdown
+				ShowDropDownMenu(this, BuildCurrencyDropdown(), _opt_ptr->currency, GAMEOPT_CURRENCY_BTN, _game_mode == GM_MENU ? 0 : ~GetMaskOfAllowedCurrencies(), 0);
+				break;
+
+			case GAMEOPT_DISTANCE_BTN: // Setup distance unit dropdown
+				ShowDropDownMenu(this, _units_dropdown, _opt_ptr->units, GAMEOPT_DISTANCE_BTN, 0, 0);
+				break;
+
+			case GAMEOPT_ROADSIDE_BTN: { // Setup road-side dropdown
+				int i = 0;
+				extern bool RoadVehiclesAreBuilt();
+
+				/* You can only change the drive side if you are in the menu or ingame with
+				 * no vehicles present. In a networking game only the server can change it */
+				if ((_game_mode != GM_MENU && RoadVehiclesAreBuilt()) || (_networking && !_network_server)) {
+					i = (-1) ^ (1 << _opt_ptr->road_side); // disable the other value
+				}
+
+				ShowDropDownMenu(this, _driveside_dropdown, _opt_ptr->road_side, GAMEOPT_ROADSIDE_BTN, i, 0);
+			} break;
+
+			case GAMEOPT_TOWNNAME_BTN: // Setup townname dropdown
+				ShowTownnameDropdown(this, _opt_ptr->town_name);
+				break;
+
+			case GAMEOPT_AUTOSAVE_BTN: // Setup autosave dropdown
+				ShowDropDownMenu(this, _autosave_dropdown, _opt_ptr->autosave, GAMEOPT_AUTOSAVE_BTN, 0, 0);
+				break;
+
+			case GAMEOPT_VEHICLENAME_BTN: // Setup customized vehicle-names dropdown
+				ShowDropDownMenu(this, _designnames_dropdown, (_vehicle_design_names & 1) ? 1 : 0, GAMEOPT_VEHICLENAME_BTN, (_vehicle_design_names & 2) ? 0 : 2, 0);
+				break;
+
+			case GAMEOPT_VEHICLENAME_SAVE: // Save customized vehicle-names to disk
+				break;  // not implemented
+
+			case GAMEOPT_LANG_BTN: { // Setup interface language dropdown
+				typedef std::map<StringID, int, StringIDCompare> LangList;
+
+				/* Sort language names */
+				LangList langs;
+				for (int i = 0; i < _dynlang.num; i++) langs[SPECSTR_LANGUAGE_START + i] = i;
+
+				DropDownList *list = new DropDownList();
+				for (LangList::iterator it = langs.begin(); it != langs.end(); it++) {
+					list->push_back(new DropDownListStringItem((*it).first, (*it).second, false));
+				}
+
+				ShowDropDownList(this, list, _dynlang.curr, GAMEOPT_LANG_BTN);
+			} break;
+
+			case GAMEOPT_RESOLUTION_BTN: // Setup resolution dropdown
+				ShowDropDownMenu(this, BuildDynamicDropdown(SPECSTR_RESOLUTION_START, _num_resolutions), GetCurRes(), GAMEOPT_RESOLUTION_BTN, 0, 0);
+				break;
+
+			case GAMEOPT_FULLSCREEN: // Click fullscreen on/off
+				/* try to toggle full-screen on/off */
+				if (!ToggleFullScreen(!_fullscreen)) {
+					ShowErrorMessage(INVALID_STRING_ID, STR_FULLSCREEN_FAILED, 0, 0);
+				}
+				this->SetWidgetLoweredState(GAMEOPT_FULLSCREEN, _fullscreen);
+				this->SetDirty();
+				break;
+
+			case GAMEOPT_SCREENSHOT_BTN: // Setup screenshot format dropdown
+				ShowDropDownMenu(this, BuildDynamicDropdown(SPECSTR_SCREENSHOT_START, _num_screenshot_formats), _cur_screenshot_format, GAMEOPT_SCREENSHOT_BTN, 0, 0);
+				break;
+		}
+	}
+
+	virtual void OnDropdownSelect(int widget, int index)
+	{
+		switch (widget) {
+			case GAMEOPT_VEHICLENAME_BTN: // Vehicle design names
+				if (index == 0) {
+					DeleteCustomEngineNames();
+					MarkWholeScreenDirty();
+				} else if (!(_vehicle_design_names & 1)) {
+					LoadCustomEngineNames();
+					MarkWholeScreenDirty();
+				}
+				break;
+
+			case GAMEOPT_CURRENCY_BTN: /* Currency */
+				if (index == CUSTOM_CURRENCY_ID) ShowCustCurrency();
+				_opt_ptr->currency = index;
+				MarkWholeScreenDirty();
+				break;
+
+			case GAMEOPT_DISTANCE_BTN: // Measuring units
+				_opt_ptr->units = index;
+				MarkWholeScreenDirty();
+				break;
+
+			case GAMEOPT_ROADSIDE_BTN: // Road side
+				if (_opt_ptr->road_side != index) { // only change if setting changed
+					DoCommandP(0, index, 0, NULL, CMD_SET_ROAD_DRIVE_SIDE | CMD_MSG(STR_00B4_CAN_T_DO_THIS));
+					MarkWholeScreenDirty();
+				}
+				break;
+
+			case GAMEOPT_TOWNNAME_BTN: // Town names
+				if (_game_mode == GM_MENU) {
+					_opt_ptr->town_name = index;
+					InvalidateWindow(WC_GAME_OPTIONS, 0);
+				}
+				break;
+
+			case GAMEOPT_AUTOSAVE_BTN: // Autosave options
+				_opt.autosave = _opt_newgame.autosave = index;
+				this->SetDirty();
+				break;
+
+			case GAMEOPT_LANG_BTN: // Change interface language
+				ReadLanguagePack(index);
+				CheckForMissingGlyphsInLoadedLanguagePack();
+				UpdateAllStationVirtCoord();
+				UpdateAllWaypointSigns();
+				MarkWholeScreenDirty();
+				break;
+
+			case GAMEOPT_RESOLUTION_BTN: // Change resolution
+				if (index < _num_resolutions && ChangeResInGame(_resolutions[index][0], _resolutions[index][1])) {
+					this->SetDirty();
+				}
+				break;
+
+			case GAMEOPT_SCREENSHOT_BTN: // Change screenshot format
+				SetScreenshotFormat(index);
+				this->SetDirty();
+				break;
+		}
+	}
+};
 
 static const Widget _game_options_widgets[] = {
 {   WWT_CLOSEBOX,   RESIZE_NONE,    14,     0,    10,     0,    13, STR_00C5,                          STR_018B_CLOSE_WINDOW},
@@ -382,14 +349,13 @@
 	WC_GAME_OPTIONS, WC_NONE,
 	WDF_STD_TOOLTIPS | WDF_STD_BTN | WDF_DEF_WIDGET | WDF_UNCLICK_BUTTONS,
 	_game_options_widgets,
-	GameOptionsWndProc
 };
 
 
 void ShowGameOptions()
 {
 	DeleteWindowById(WC_GAME_OPTIONS, 0);
-	new Window(&_game_options_desc);
+	new GameOptionsWindow(&_game_options_desc);
 }
 
 struct GameSettingData {
@@ -478,194 +444,6 @@
 
 extern void StartupEconomy();
 
-enum {
-	GAMEDIFF_WND_TOP_OFFSET = 45,
-	GAMEDIFF_WND_ROWSIZE    = 9
-};
-
-/* Temporary holding place of values in the difficulty window until 'Save' is clicked */
-static GameOptions _opt_mod_temp;
-// 0x383E = (1 << 13) | (1 << 12) | (1 << 11) | (1 << 5) | (1 << 4) | (1 << 3) | (1 << 2) | (1 << 1)
-#define DIFF_INGAME_DISABLED_BUTTONS 0x383E
-
-#define NO_SETTINGS_BUTTON 0xFF
-
-/** Carriage for the game settings window data */
-struct difficulty_d {
-	bool clicked_increase;
-	uint8 clicked_button;
-	uint8 timeout;
-};
-assert_compile(WINDOW_CUSTOM_SIZE >= sizeof(difficulty_d));
-
-/* Names of the game difficulty settings window */
-enum GameDifficultyWidgets {
-	GDW_CLOSEBOX = 0,
-	GDW_CAPTION,
-	GDW_UPPER_BG,
-	GDW_LVL_EASY,
-	GDW_LVL_MEDIUM,
-	GDW_LVL_HARD,
-	GDW_LVL_CUSTOM,
-	GDW_HIGHSCORE,
-	GDW_SETTING_BG,
-	GDW_LOWER_BG,
-	GDW_ACCEPT,
-	GDW_CANCEL,
-};
-
-static void GameDifficultyWndProc(Window *w, WindowEvent *e)
-{
-	difficulty_d *diffic_d = &WP(w, difficulty_d);
-	switch (e->event) {
-		case WE_CREATE:
-			diffic_d->clicked_increase = false;
-			diffic_d->clicked_button = NO_SETTINGS_BUTTON;
-			diffic_d->timeout = 0;
-			/* Hide the closebox to make sure that the user aborts or confirms his changes */
-			w->HideWidget(GDW_CLOSEBOX);
-			w->widget[GDW_CAPTION].left = 0;
-			/* Setup disabled buttons when creating window
-			 * disable all other difficulty buttons during gameplay except for 'custom' */
-			w->SetWidgetsDisabledState(_game_mode == GM_NORMAL,
-				GDW_LVL_EASY,
-				GDW_LVL_MEDIUM,
-				GDW_LVL_HARD,
-				GDW_LVL_CUSTOM,
-				WIDGET_LIST_END);
-			w->SetWidgetDisabledState(GDW_HIGHSCORE, _game_mode == GM_EDITOR || _networking); // highscore chart in multiplayer
-			w->SetWidgetDisabledState(GDW_ACCEPT, _networking && !_network_server); // Save-button in multiplayer (and if client)
-			w->LowerWidget(GDW_LVL_EASY + _opt_mod_temp.diff_level);
-			break;
-
-		case WE_PAINT: {
-			DrawWindowWidgets(w);
-
-			/* XXX - Disabled buttons in normal gameplay or during muliplayer as non server.
-			 *       Bitshifted for each button to see if that bit is set. If it is set, the
-			 *       button is disabled */
-			uint32 disabled = 0;
-			if (_networking && !_network_server) {
-				disabled = MAX_UVALUE(uint32); // Disable all
-			} else if (_game_mode == GM_NORMAL) {
-				disabled = DIFF_INGAME_DISABLED_BUTTONS;
-			}
-
-			int value;
-			int y = GAMEDIFF_WND_TOP_OFFSET;
-			for (uint i = 0; i != GAME_DIFFICULTY_NUM; i++) {
-				const GameSettingData *gsd = &_game_setting_info[i];
-				value = ((GDType*)&_opt_mod_temp.diff)[i];
-
-				DrawArrowButtons(5, y, 3,
-						(diffic_d->clicked_button == i) ? 1 + !!diffic_d->clicked_increase : 0,
-						!(HasBit(disabled, i) || gsd->min == value),
-						!(HasBit(disabled, i) || gsd->max == value));
-
-				value += _game_setting_info[i].str;
-				if (i == 4) value *= 1000; // XXX - handle currency option
-				SetDParam(0, value);
-				DrawString(30, y, STR_6805_MAXIMUM_NO_COMPETITORS + i, TC_FROMSTRING);
-
-				y += GAMEDIFF_WND_ROWSIZE + 2; // space items apart a bit
-			}
-		} break;
-
-		case WE_CLICK:
-			switch (e->we.click.widget) {
-				case GDW_SETTING_BG: { /* Difficulty settings widget, decode click */
-					/* Don't allow clients to make any changes */
-					if (_networking && !_network_server) return;
-
-					const int x = e->we.click.pt.x - 5;
-					if (!IsInsideMM(x, 0, 21)) // Button area
-						return;
-
-					const int y = e->we.click.pt.y - GAMEDIFF_WND_TOP_OFFSET;
-					if (y < 0) return;
-
-					/* Get button from Y coord. */
-					const uint8 btn = y / (GAMEDIFF_WND_ROWSIZE + 2);
-					if (btn >= GAME_DIFFICULTY_NUM || y % (GAMEDIFF_WND_ROWSIZE + 2) >= 9)
-						return;
-
-					/* Clicked disabled button? */
-					if (_game_mode == GM_NORMAL && HasBit(DIFF_INGAME_DISABLED_BUTTONS, btn))
-						return;
-
-					diffic_d->timeout = 5;
-
-					int16 val = ((GDType*)&_opt_mod_temp.diff)[btn];
-
-					const GameSettingData *info = &_game_setting_info[btn]; // get information about the difficulty setting
-					if (x >= 10) {
-						/* Increase button clicked */
-						val = min(val + info->step, info->max);
-						diffic_d->clicked_increase = true;
-					} else {
-						/* Decrease button clicked */
-						val -= info->step;
-						val = max(val,  info->min);
-						diffic_d->clicked_increase = false;
-					}
-					diffic_d->clicked_button = btn;
-
-					/* save value in temporary variable */
-					((GDType*)&_opt_mod_temp.diff)[btn] = val;
-					w->RaiseWidget(GDW_LVL_EASY + _opt_mod_temp.diff_level);
-					SetDifficultyLevel(3, &_opt_mod_temp); // set difficulty level to custom
-					w->LowerWidget(GDW_LVL_CUSTOM);
-					w->SetDirty();
-				} break;
-
-				case GDW_LVL_EASY:
-				case GDW_LVL_MEDIUM:
-				case GDW_LVL_HARD:
-				case GDW_LVL_CUSTOM:
-					/* temporarily change difficulty level */
-					w->RaiseWidget(GDW_LVL_EASY + _opt_mod_temp.diff_level);
-					SetDifficultyLevel(e->we.click.widget - GDW_LVL_EASY, &_opt_mod_temp);
-					w->LowerWidget(GDW_LVL_EASY + _opt_mod_temp.diff_level);
-					w->SetDirty();
-					break;
-
-				case GDW_HIGHSCORE: // Highscore Table
-					ShowHighscoreTable(_opt_mod_temp.diff_level, -1);
-					break;
-
-				case GDW_ACCEPT: { // Save button - save changes
-					GDType btn, val;
-					for (btn = 0; btn != GAME_DIFFICULTY_NUM; btn++) {
-						val = ((GDType*)&_opt_mod_temp.diff)[btn];
-						/* if setting has changed, change it */
-						if (val != ((GDType*)&_opt_ptr->diff)[btn])
-							DoCommandP(0, btn, val, NULL, CMD_CHANGE_DIFFICULTY_LEVEL);
-					}
-					DoCommandP(0, UINT_MAX, _opt_mod_temp.diff_level, NULL, CMD_CHANGE_DIFFICULTY_LEVEL);
-					delete w;
-					/* If we are in the editor, we should reload the economy.
-					 * This way when you load a game, the max loan and interest rate
-					 * are loaded correctly. */
-					if (_game_mode == GM_EDITOR) StartupEconomy();
-					break;
-				}
-
-				case GDW_CANCEL: // Cancel button - close window, abandon changes
-					delete w;
-					break;
-			} break;
-
-		case WE_TICK: /* Handle the visual 'clicking' of the buttons */
-			if (diffic_d->timeout != 0) {
-				diffic_d->timeout--;
-				if (diffic_d->timeout == 0) diffic_d->clicked_button = NO_SETTINGS_BUTTON;
-				w->SetDirty();
-			}
-			break;
-	}
-}
-#undef DIFF_INGAME_DISABLED_BUTTONS
-
 /* Widget definition for the game difficulty settings window */
 static const Widget _game_difficulty_widgets[] = {
 {   WWT_CLOSEBOX,   RESIZE_NONE,    10,     0,    10,     0,    13, STR_00C5,                     STR_018B_CLOSE_WINDOW},           // GDW_CLOSEBOX
@@ -689,16 +467,198 @@
 	WC_GAME_OPTIONS, WC_NONE,
 	WDF_STD_TOOLTIPS | WDF_STD_BTN | WDF_DEF_WIDGET,
 	_game_difficulty_widgets,
-	GameDifficultyWndProc
+};
+
+struct GameDifficultyWindow : public Window {
+private:
+	bool clicked_increase;
+	uint8 clicked_button;
+	uint8 timeout;
+
+	/* Temporary holding place of values in the difficulty window until 'Save' is clicked */
+	GameOptions opt_mod_temp;
+
+	enum {
+		GAMEDIFF_WND_TOP_OFFSET = 45,
+		GAMEDIFF_WND_ROWSIZE    = 9,
+		// 0x383E = (1 << 13) | (1 << 12) | (1 << 11) | (1 << 5) | (1 << 4) | (1 << 3) | (1 << 2) | (1 << 1)
+		DIFF_INGAME_DISABLED_BUTTONS = 0x383E,
+		NO_SETTINGS_BUTTON = 0xFF,
+	};
+
+	/* Names of the game difficulty settings window */
+	enum GameDifficultyWidgets {
+		GDW_CLOSEBOX = 0,
+		GDW_CAPTION,
+		GDW_UPPER_BG,
+		GDW_LVL_EASY,
+		GDW_LVL_MEDIUM,
+		GDW_LVL_HARD,
+		GDW_LVL_CUSTOM,
+		GDW_HIGHSCORE,
+		GDW_SETTING_BG,
+		GDW_LOWER_BG,
+		GDW_ACCEPT,
+		GDW_CANCEL,
+	};
+
+public:
+	GameDifficultyWindow() : Window(&_game_difficulty_desc)
+	{
+		/* Copy current settings (ingame or in intro) to temporary holding place
+		 * change that when setting stuff, copy back on clicking 'OK' */
+		this->opt_mod_temp = *_opt_ptr;
+		this->clicked_increase = false;
+		this->clicked_button = NO_SETTINGS_BUTTON;
+		this->timeout = 0;
+		/* Hide the closebox to make sure that the user aborts or confirms his changes */
+		this->HideWidget(GDW_CLOSEBOX);
+		this->widget[GDW_CAPTION].left = 0;
+		/* Setup disabled buttons when creating window
+		 * disable all other difficulty buttons during gameplay except for 'custom' */
+		this->SetWidgetsDisabledState(_game_mode == GM_NORMAL,
+			GDW_LVL_EASY,
+			GDW_LVL_MEDIUM,
+			GDW_LVL_HARD,
+			GDW_LVL_CUSTOM,
+			WIDGET_LIST_END);
+		this->SetWidgetDisabledState(GDW_HIGHSCORE, _game_mode == GM_EDITOR || _networking); // highscore chart in multiplayer
+		this->SetWidgetDisabledState(GDW_ACCEPT, _networking && !_network_server); // Save-button in multiplayer (and if client)
+		this->LowerWidget(GDW_LVL_EASY + this->opt_mod_temp.diff_level);
+		this->FindWindowPlacementAndResize(&_game_difficulty_desc);
+	}
+
+	virtual void OnPaint()
+	{
+		this->DrawWidgets();
+
+		/* XXX - Disabled buttons in normal gameplay or during muliplayer as non server.
+		 *       Bitshifted for each button to see if that bit is set. If it is set, the
+		 *       button is disabled */
+		uint32 disabled = 0;
+		if (_networking && !_network_server) {
+			disabled = MAX_UVALUE(uint32); // Disable all
+		} else if (_game_mode == GM_NORMAL) {
+			disabled = DIFF_INGAME_DISABLED_BUTTONS;
+		}
+
+		int value;
+		int y = GAMEDIFF_WND_TOP_OFFSET;
+		for (uint i = 0; i != GAME_DIFFICULTY_NUM; i++) {
+			const GameSettingData *gsd = &_game_setting_info[i];
+			value = ((GDType*)&this->opt_mod_temp.diff)[i];
+
+			DrawArrowButtons(5, y, 3,
+					(this->clicked_button == i) ? 1 + !!this->clicked_increase : 0,
+					!(HasBit(disabled, i) || gsd->min == value),
+					!(HasBit(disabled, i) || gsd->max == value));
+
+			value += _game_setting_info[i].str;
+			if (i == 4) value *= 1000; // XXX - handle currency option
+			SetDParam(0, value);
+			DrawString(30, y, STR_6805_MAXIMUM_NO_COMPETITORS + i, TC_FROMSTRING);
+
+			y += GAMEDIFF_WND_ROWSIZE + 2; // space items apart a bit
+		}
+	}
+
+	virtual void OnClick(Point pt, int widget)
+	{
+		switch (widget) {
+			case GDW_SETTING_BG: { /* Difficulty settings widget, decode click */
+				/* Don't allow clients to make any changes */
+				if (_networking && !_network_server) return;
+
+				const int x = pt.x - 5;
+				if (!IsInsideMM(x, 0, 21)) return; // Button area
+
+				const int y = pt.y - GAMEDIFF_WND_TOP_OFFSET;
+				if (y < 0) return;
+
+				/* Get button from Y coord. */
+				const uint8 btn = y / (GAMEDIFF_WND_ROWSIZE + 2);
+				if (btn >= GAME_DIFFICULTY_NUM || y % (GAMEDIFF_WND_ROWSIZE + 2) >= 9) return;
+
+				/* Clicked disabled button? */
+				if (_game_mode == GM_NORMAL && HasBit((int)DIFF_INGAME_DISABLED_BUTTONS, btn)) return;
+
+				this->timeout = 5;
+
+				int16 val = ((GDType*)&this->opt_mod_temp.diff)[btn];
+
+				const GameSettingData *info = &_game_setting_info[btn]; // get information about the difficulty setting
+				if (x >= 10) {
+					/* Increase button clicked */
+					val = min(val + info->step, info->max);
+					this->clicked_increase = true;
+				} else {
+					/* Decrease button clicked */
+					val -= info->step;
+					val = max(val,  info->min);
+					this->clicked_increase = false;
+				}
+				this->clicked_button = btn;
+
+				/* save value in temporary variable */
+				((GDType*)&this->opt_mod_temp.diff)[btn] = val;
+				this->RaiseWidget(GDW_LVL_EASY + this->opt_mod_temp.diff_level);
+				SetDifficultyLevel(3, &this->opt_mod_temp); // set difficulty level to custom
+				this->LowerWidget(GDW_LVL_CUSTOM);
+				this->SetDirty();
+			} break;
+
+			case GDW_LVL_EASY:
+			case GDW_LVL_MEDIUM:
+			case GDW_LVL_HARD:
+			case GDW_LVL_CUSTOM:
+				/* temporarily change difficulty level */
+				this->RaiseWidget(GDW_LVL_EASY + this->opt_mod_temp.diff_level);
+				SetDifficultyLevel(widget - GDW_LVL_EASY, &this->opt_mod_temp);
+				this->LowerWidget(GDW_LVL_EASY + this->opt_mod_temp.diff_level);
+				this->SetDirty();
+				break;
+
+			case GDW_HIGHSCORE: // Highscore Table
+				ShowHighscoreTable(this->opt_mod_temp.diff_level, -1);
+				break;
+
+			case GDW_ACCEPT: { // Save button - save changes
+				GDType btn, val;
+				for (btn = 0; btn != GAME_DIFFICULTY_NUM; btn++) {
+					val = ((GDType*)&this->opt_mod_temp.diff)[btn];
+					/* if setting has changed, change it */
+					if (val != ((GDType*)&_opt_ptr->diff)[btn])
+						DoCommandP(0, btn, val, NULL, CMD_CHANGE_DIFFICULTY_LEVEL);
+				}
+				DoCommandP(0, UINT_MAX, this->opt_mod_temp.diff_level, NULL, CMD_CHANGE_DIFFICULTY_LEVEL);
+				delete this;
+				/* If we are in the editor, we should reload the economy.
+				 * This way when you load a game, the max loan and interest rate
+				 * are loaded correctly. */
+				if (_game_mode == GM_EDITOR) StartupEconomy();
+				break;
+			}
+
+			case GDW_CANCEL: // Cancel button - close window, abandon changes
+				delete this;
+				break;
+		}
+	}
+
+	virtual void OnTick()
+	{
+		if (this->timeout != 0) {
+			this->timeout--;
+			if (this->timeout == 0) this->clicked_button = NO_SETTINGS_BUTTON;
+			this->SetDirty();
+		}
+	}
 };
 
 void ShowGameDifficulty()
 {
 	DeleteWindowById(WC_GAME_OPTIONS, 0);
-	/* Copy current settings (ingame or in intro) to temporary holding place
-	 * change that when setting stuff, copy back on clicking 'OK' */
-	_opt_mod_temp = *_opt_ptr;
-	new Window(&_game_difficulty_desc);
+	new GameDifficultyWindow();
 }
 
 static const char *_patches_ui[] = {
@@ -854,228 +814,232 @@
 	PATCHSEL_COMPETITORS
 };
 
-/** The main patches window. Shows a number of categories on top and
- * a selection of patches in that category.
- * Uses WP(w, def_d) macro - data_1, data_2, data_3 */
-static void PatchesSelectionWndProc(Window *w, WindowEvent *e)
-{
+struct PatchesSelectionWindow : Window {
 	static Patches *patches_ptr;
-	static int patches_max = 0;
-
-	switch (e->event) {
-		case WE_CREATE: {
-			static bool first_time = true;
-
-			patches_ptr = (_game_mode == GM_MENU) ? &_patches_newgame : &_patches;
-
-			/* Build up the dynamic settings-array only once per OpenTTD session */
-			if (first_time) {
-				PatchPage *page;
-				for (page = &_patches_page[0]; page != endof(_patches_page); page++) {
-					uint i;
-
-					if (patches_max < page->num) patches_max = page->num;
-
-					page->entries = MallocT<PatchEntry>(page->num);
-					for (i = 0; i != page->num; i++) {
-						uint index;
-						const SettingDesc *sd = GetPatchFromName(page->names[i], &index);
-						assert(sd != NULL);
-
-						page->entries[i].setting = sd;
-						page->entries[i].index = index;
-					}
-				}
-				first_time = false;
-			}
-
-			/* Resize the window to fit the largest patch tab */
-			ResizeWindowForWidget(w, PATCHSEL_OPTIONSPANEL, 0, patches_max * 11);
-
-			/* Recentre the window for the new size */
-			w->top = w->top - (patches_max * 11) / 2;
-
-			w->LowerWidget(4);
-		} break;
+	static int patches_max;
 
-		case WE_PAINT: {
-			int x, y;
-			const PatchPage *page = &_patches_page[WP(w, def_d).data_1];
-			uint i;
-
-			/* Set up selected category */
-			DrawWindowWidgets(w);
-
-			x = 5;
-			y = 47;
-			for (i = 0; i != page->num; i++) {
-				const SettingDesc *sd = page->entries[i].setting;
-				const SettingDescBase *sdb = &sd->desc;
-				const void *var = GetVariableAddress(patches_ptr, &sd->save);
-				bool editable = true;
-				bool disabled = false;
-
-				// We do not allow changes of some items when we are a client in a networkgame
-				if (!(sd->save.conv & SLF_NETWORK_NO) && _networking && !_network_server) editable = false;
-				if ((sdb->flags & SGF_NETWORK_ONLY) && !_networking) editable = false;
-				if ((sdb->flags & SGF_NO_NETWORK) && _networking) editable = false;
+	int page;
+	int entry;
+	int click;
 
-				if (sdb->cmd == SDT_BOOLX) {
-					static const int _bool_ctabs[2][2] = {{9, 4}, {7, 6}};
-					/* Draw checkbox for boolean-value either on/off */
-					bool on = (*(bool*)var);
-
-					DrawFrameRect(x, y, x + 19, y + 8, _bool_ctabs[!!on][!!editable], on ? FR_LOWERED : FR_NONE);
-					SetDParam(0, on ? STR_CONFIG_PATCHES_ON : STR_CONFIG_PATCHES_OFF);
-				} else {
-					int32 value;
-
-					value = (int32)ReadValue(var, sd->save.conv);
+	PatchesSelectionWindow(const WindowDesc *desc) : Window(desc)
+	{
+		static bool first_time = true;
 
-					/* Draw [<][>] boxes for settings of an integer-type */
-					DrawArrowButtons(x, y, 3, WP(w, def_d).data_2 - (i * 2), (editable && value != sdb->min), (editable && value != sdb->max));
+		patches_ptr = (_game_mode == GM_MENU) ? &_patches_newgame : &_patches;
 
-					disabled = (value == 0) && (sdb->flags & SGF_0ISDISABLED);
-					if (disabled) {
-						SetDParam(0, STR_CONFIG_PATCHES_DISABLED);
+		/* Build up the dynamic settings-array only once per OpenTTD session */
+		if (first_time) {
+			PatchPage *page;
+			for (page = &_patches_page[0]; page != endof(_patches_page); page++) {
+				uint i;
+
+				if (patches_max < page->num) patches_max = page->num;
+
+				page->entries = MallocT<PatchEntry>(page->num);
+				for (i = 0; i != page->num; i++) {
+					uint index;
+					const SettingDesc *sd = GetPatchFromName(page->names[i], &index);
+					assert(sd != NULL);
+
+					page->entries[i].setting = sd;
+					page->entries[i].index = index;
+				}
+			}
+			first_time = false;
+		}
+
+		/* Resize the window to fit the largest patch tab */
+		ResizeWindowForWidget(this, PATCHSEL_OPTIONSPANEL, 0, patches_max * 11);
+
+		/* Recentre the window for the new size */
+		this->top = this->top - (patches_max * 11) / 2;
+
+		this->LowerWidget(4);
+
+		this->FindWindowPlacementAndResize(desc);
+	}
+
+	virtual void OnPaint()
+	{
+		int x, y;
+		const PatchPage *page = &_patches_page[this->page];
+		uint i;
+
+		/* Set up selected category */
+		this->DrawWidgets();
+
+		x = 5;
+		y = 47;
+		for (i = 0; i != page->num; i++) {
+			const SettingDesc *sd = page->entries[i].setting;
+			const SettingDescBase *sdb = &sd->desc;
+			const void *var = GetVariableAddress(patches_ptr, &sd->save);
+			bool editable = true;
+			bool disabled = false;
+
+			// We do not allow changes of some items when we are a client in a networkgame
+			if (!(sd->save.conv & SLF_NETWORK_NO) && _networking && !_network_server) editable = false;
+			if ((sdb->flags & SGF_NETWORK_ONLY) && !_networking) editable = false;
+			if ((sdb->flags & SGF_NO_NETWORK) && _networking) editable = false;
+
+			if (sdb->cmd == SDT_BOOLX) {
+				static const int _bool_ctabs[2][2] = {{9, 4}, {7, 6}};
+				/* Draw checkbox for boolean-value either on/off */
+				bool on = (*(bool*)var);
+
+				DrawFrameRect(x, y, x + 19, y + 8, _bool_ctabs[!!on][!!editable], on ? FR_LOWERED : FR_NONE);
+				SetDParam(0, on ? STR_CONFIG_PATCHES_ON : STR_CONFIG_PATCHES_OFF);
+			} else {
+				int32 value;
+
+				value = (int32)ReadValue(var, sd->save.conv);
+
+				/* Draw [<][>] boxes for settings of an integer-type */
+				DrawArrowButtons(x, y, 3, this->click - (i * 2), (editable && value != sdb->min), (editable && value != sdb->max));
+
+				disabled = (value == 0) && (sdb->flags & SGF_0ISDISABLED);
+				if (disabled) {
+					SetDParam(0, STR_CONFIG_PATCHES_DISABLED);
+				} else {
+					if (sdb->flags & SGF_CURRENCY) {
+						SetDParam(0, STR_CONFIG_PATCHES_CURRENCY);
+					} else if (sdb->flags & SGF_MULTISTRING) {
+						SetDParam(0, sdb->str + value + 1);
 					} else {
-						if (sdb->flags & SGF_CURRENCY) {
-							SetDParam(0, STR_CONFIG_PATCHES_CURRENCY);
-						} else if (sdb->flags & SGF_MULTISTRING) {
-							SetDParam(0, sdb->str + value + 1);
+						SetDParam(0, (sdb->flags & SGF_NOCOMMA) ? STR_CONFIG_PATCHES_INT32 : STR_7024);
+					}
+					SetDParam(1, value);
+				}
+			}
+			DrawString(30, y, (sdb->str) + disabled, TC_FROMSTRING);
+			y += 11;
+		}
+	}
+
+	virtual void OnClick(Point pt, int widget)
+	{
+		switch (widget) {
+			case PATCHSEL_OPTIONSPANEL: {
+				const PatchPage *page = &_patches_page[this->page];
+				const SettingDesc *sd;
+				void *var;
+				int32 value;
+				int x, y;
+				byte btn;
+
+				y = pt.y - 46 - 1;
+				if (y < 0) return;
+
+				x = pt.x - 5;
+				if (x < 0) return;
+
+				btn = y / 11;
+				if (y % 11 > 9) return;
+				if (btn >= page->num) return;
+
+				sd = page->entries[btn].setting;
+
+				/* return if action is only active in network, or only settable by server */
+				if (!(sd->save.conv & SLF_NETWORK_NO) && _networking && !_network_server) return;
+				if ((sd->desc.flags & SGF_NETWORK_ONLY) && !_networking) return;
+				if ((sd->desc.flags & SGF_NO_NETWORK) && _networking) return;
+
+				var = GetVariableAddress(patches_ptr, &sd->save);
+				value = (int32)ReadValue(var, sd->save.conv);
+
+				/* clicked on the icon on the left side. Either scroller or bool on/off */
+				if (x < 21) {
+					const SettingDescBase *sdb = &sd->desc;
+					int32 oldvalue = value;
+
+					switch (sdb->cmd) {
+					case SDT_BOOLX: value ^= 1; break;
+					case SDT_NUMX: {
+						/* Add a dynamic step-size to the scroller. In a maximum of
+							* 50-steps you should be able to get from min to max,
+							* unless specified otherwise in the 'interval' variable
+							* of the current patch. */
+						uint32 step = (sdb->interval == 0) ? ((sdb->max - sdb->min) / 50) : sdb->interval;
+						if (step == 0) step = 1;
+
+						// don't allow too fast scrolling
+						if ((this->flags4 & WF_TIMEOUT_MASK) > 2 << WF_TIMEOUT_SHL) {
+							_left_button_clicked = false;
+							return;
+						}
+
+						/* Increase or decrease the value and clamp it to extremes */
+						if (x >= 10) {
+							value += step;
+							if (value > sdb->max) value = sdb->max;
 						} else {
-							SetDParam(0, (sdb->flags & SGF_NOCOMMA) ? STR_CONFIG_PATCHES_INT32 : STR_7024);
+							value -= step;
+							if (value < sdb->min) value = (sdb->flags & SGF_0ISDISABLED) ? 0 : sdb->min;
 						}
-						SetDParam(1, value);
+
+						/* Set up scroller timeout for numeric values */
+						if (value != oldvalue && !(sd->desc.flags & SGF_MULTISTRING)) {
+							this->click = btn * 2 + 1 + ((x >= 10) ? 1 : 0);
+							this->flags4 |= 5 << WF_TIMEOUT_SHL;
+							_left_button_clicked = false;
+						}
+					} break;
+					default: NOT_REACHED();
+					}
+
+					if (value != oldvalue) {
+						SetPatchValue(page->entries[btn].index, patches_ptr, value);
+						this->SetDirty();
+					}
+				} else {
+					/* only open editbox for types that its sensible for */
+					if (sd->desc.cmd != SDT_BOOLX && !(sd->desc.flags & SGF_MULTISTRING)) {
+						/* Show the correct currency-translated value */
+						if (sd->desc.flags & SGF_CURRENCY) value *= _currency->rate;
+
+						this->entry = btn;
+						SetDParam(0, value);
+						ShowQueryString(STR_CONFIG_PATCHES_INT32, STR_CONFIG_PATCHES_QUERY_CAPT, 10, 100, this, CS_NUMERAL);
 					}
 				}
-				DrawString(30, y, (sdb->str) + disabled, TC_FROMSTRING);
-				y += 11;
-			}
-		} break;
-
-		case WE_CLICK:
-			switch (e->we.click.widget) {
-				case PATCHSEL_OPTIONSPANEL: {
-					const PatchPage *page = &_patches_page[WP(w, def_d).data_1];
-					const SettingDesc *sd;
-					void *var;
-					int32 value;
-					int x, y;
-					byte btn;
-
-					y = e->we.click.pt.y - 46 - 1;
-					if (y < 0) return;
-
-					x = e->we.click.pt.x - 5;
-					if (x < 0) return;
-
-					btn = y / 11;
-					if (y % 11 > 9) return;
-					if (btn >= page->num) return;
-
-					sd = page->entries[btn].setting;
-
-					/* return if action is only active in network, or only settable by server */
-					if (!(sd->save.conv & SLF_NETWORK_NO) && _networking && !_network_server) return;
-					if ((sd->desc.flags & SGF_NETWORK_ONLY) && !_networking) return;
-					if ((sd->desc.flags & SGF_NO_NETWORK) && _networking) return;
-
-					var = GetVariableAddress(patches_ptr, &sd->save);
-					value = (int32)ReadValue(var, sd->save.conv);
-
-					/* clicked on the icon on the left side. Either scroller or bool on/off */
-					if (x < 21) {
-						const SettingDescBase *sdb = &sd->desc;
-						int32 oldvalue = value;
-
-						switch (sdb->cmd) {
-						case SDT_BOOLX: value ^= 1; break;
-						case SDT_NUMX: {
-							/* Add a dynamic step-size to the scroller. In a maximum of
-							 * 50-steps you should be able to get from min to max,
-							 * unless specified otherwise in the 'interval' variable
-							 * of the current patch. */
-							uint32 step = (sdb->interval == 0) ? ((sdb->max - sdb->min) / 50) : sdb->interval;
-							if (step == 0) step = 1;
-
-							// don't allow too fast scrolling
-							if ((w->flags4 & WF_TIMEOUT_MASK) > 2 << WF_TIMEOUT_SHL) {
-								_left_button_clicked = false;
-								return;
-							}
+			} break;
 
-							/* Increase or decrease the value and clamp it to extremes */
-							if (x >= 10) {
-								value += step;
-								if (value > sdb->max) value = sdb->max;
-							} else {
-								value -= step;
-								if (value < sdb->min) value = (sdb->flags & SGF_0ISDISABLED) ? 0 : sdb->min;
-							}
-
-							/* Set up scroller timeout for numeric values */
-							if (value != oldvalue && !(sd->desc.flags & SGF_MULTISTRING)) {
-								WP(w, def_d).data_2 = btn * 2 + 1 + ((x >= 10) ? 1 : 0);
-								w->flags4 |= 5 << WF_TIMEOUT_SHL;
-								_left_button_clicked = false;
-							}
-						} break;
-						default: NOT_REACHED();
-						}
-
-						if (value != oldvalue) {
-							SetPatchValue(page->entries[btn].index, patches_ptr, value);
-							w->SetDirty();
-						}
-					} else {
-						/* only open editbox for types that its sensible for */
-						if (sd->desc.cmd != SDT_BOOLX && !(sd->desc.flags & SGF_MULTISTRING)) {
-							/* Show the correct currency-translated value */
-							if (sd->desc.flags & SGF_CURRENCY) value *= _currency->rate;
+			case PATCHSEL_INTERFACE: case PATCHSEL_CONSTRUCTION: case PATCHSEL_VEHICLES:
+			case PATCHSEL_STATIONS:  case PATCHSEL_ECONOMY:      case PATCHSEL_COMPETITORS:
+				this->RaiseWidget(this->page + PATCHSEL_INTERFACE);
+				this->page = widget - PATCHSEL_INTERFACE;
+				this->LowerWidget(this->page + PATCHSEL_INTERFACE);
+				DeleteWindowById(WC_QUERY_STRING, 0);
+				this->SetDirty();
+				break;
+		}
+	}
 
-							WP(w, def_d).data_3 = btn;
-							SetDParam(0, value);
-							ShowQueryString(STR_CONFIG_PATCHES_INT32, STR_CONFIG_PATCHES_QUERY_CAPT, 10, 100, w, CS_NUMERAL);
-						}
-					}
-				} break;
-
-				case PATCHSEL_INTERFACE: case PATCHSEL_CONSTRUCTION: case PATCHSEL_VEHICLES:
-				case PATCHSEL_STATIONS:  case PATCHSEL_ECONOMY:      case PATCHSEL_COMPETITORS:
-					w->RaiseWidget(WP(w, def_d).data_1 + PATCHSEL_INTERFACE);
-					WP(w, def_d).data_1 = e->we.click.widget - PATCHSEL_INTERFACE;
-					w->LowerWidget(WP(w, def_d).data_1 + PATCHSEL_INTERFACE);
-					DeleteWindowById(WC_QUERY_STRING, 0);
-					w->SetDirty();
-					break;
-			}
-			break;
+	virtual void OnTimeout()
+	{
+		this->click = 0;
+		this->SetDirty();
+	}
 
-		case WE_TIMEOUT:
-			WP(w, def_d).data_2 = 0;
-			w->SetDirty();
-			break;
-
-		case WE_ON_EDIT_TEXT:
-			if (!StrEmpty(e->we.edittext.str)) {
-				const PatchEntry *pe = &_patches_page[WP(w, def_d).data_1].entries[WP(w, def_d).data_3];
-				const SettingDesc *sd = pe->setting;
-				int32 value = atoi(e->we.edittext.str);
+	virtual void OnQueryTextFinished(char *str)
+	{
+		if (!StrEmpty(str)) {
+			const PatchEntry *pe = &_patches_page[this->page].entries[this->entry];
+			const SettingDesc *sd = pe->setting;
+			int32 value = atoi(str);
 
-				/* Save the correct currency-translated value */
-				if (sd->desc.flags & SGF_CURRENCY) value /= _currency->rate;
+			/* Save the correct currency-translated value */
+			if (sd->desc.flags & SGF_CURRENCY) value /= _currency->rate;
 
-				SetPatchValue(pe->index, patches_ptr, value);
-				w->SetDirty();
-			}
-			break;
+			SetPatchValue(pe->index, patches_ptr, value);
+			this->SetDirty();
+		}
+	}
+};
 
-		case WE_DESTROY:
-			DeleteWindowById(WC_QUERY_STRING, 0);
-			break;
-	}
-}
+Patches *PatchesSelectionWindow::patches_ptr = NULL;
+int PatchesSelectionWindow::patches_max = 0;
 
 static const Widget _patches_selection_widgets[] = {
 {   WWT_CLOSEBOX,   RESIZE_NONE,    10,     0,    10,     0,    13, STR_00C5,                        STR_018B_CLOSE_WINDOW},
@@ -1097,13 +1061,12 @@
 	WC_GAME_OPTIONS, WC_NONE,
 	WDF_STD_TOOLTIPS | WDF_STD_BTN | WDF_DEF_WIDGET,
 	_patches_selection_widgets,
-	PatchesSelectionWndProc,
 };
 
 void ShowPatchesSelection()
 {
 	DeleteWindowById(WC_GAME_OPTIONS, 0);
-	new Window(&_patches_selection_desc);
+	new PatchesSelectionWindow(&_patches_selection_desc);
 }
 
 
@@ -1143,176 +1106,178 @@
 	CUSTCURR_TO_EURO,
 };
 
-static char _str_separator[2];
-
-static void CustCurrencyWndProc(Window *w, WindowEvent *e)
-{
-	switch (e->event) {
-		case WE_PAINT: {
-			int x;
-			int y = 20;
-			int clk = WP(w, def_d).data_1;
-			DrawWindowWidgets(w);
-
-			/* exchange rate */
-			DrawArrowButtons(10, y, 3, GB(clk, 0, 2), true, true);
-			SetDParam(0, 1);
-			SetDParam(1, 1);
-			DrawString(35, y + 1, STR_CURRENCY_EXCHANGE_RATE, TC_FROMSTRING);
-			y += 12;
-
-			/* separator */
-			DrawFrameRect(10, y + 1, 29, y + 9, 0, GB(clk, 2, 2) ? FR_LOWERED : FR_NONE);
-			x = DrawString(35, y + 1, STR_CURRENCY_SEPARATOR, TC_FROMSTRING);
-			DoDrawString(_str_separator, x + 4, y + 1, TC_ORANGE);
-			y += 12;
-
-			/* prefix */
-			DrawFrameRect(10, y + 1, 29, y + 9, 0, GB(clk, 4, 2) ? FR_LOWERED : FR_NONE);
-			x = DrawString(35, y + 1, STR_CURRENCY_PREFIX, TC_FROMSTRING);
-			DoDrawString(_custom_currency.prefix, x + 4, y + 1, TC_ORANGE);
-			y += 12;
-
-			/* suffix */
-			DrawFrameRect(10, y + 1, 29, y + 9, 0, GB(clk, 6, 2) ? FR_LOWERED : FR_NONE);
-			x = DrawString(35, y + 1, STR_CURRENCY_SUFFIX, TC_FROMSTRING);
-			DoDrawString(_custom_currency.suffix, x + 4, y + 1, TC_ORANGE);
-			y += 12;
-
-			/* switch to euro */
-			DrawArrowButtons(10, y, 3, GB(clk, 8, 2), true, true);
-			SetDParam(0, _custom_currency.to_euro);
-			DrawString(35, y + 1, (_custom_currency.to_euro != CF_NOEURO) ? STR_CURRENCY_SWITCH_TO_EURO : STR_CURRENCY_SWITCH_TO_EURO_NEVER, TC_FROMSTRING);
-			y += 12;
+struct CustomCurrencyWindow : Window {
+	char separator[2];
+	int click;
+	int query_widget;
 
-			/* Preview */
-			y += 12;
-			SetDParam(0, 10000);
-			DrawString(35, y + 1, STR_CURRENCY_PREVIEW, TC_FROMSTRING);
-		} break;
-
-		case WE_CLICK: {
-			int line = (e->we.click.pt.y - 20) / 12;
-			int len = 0;
-			int x = e->we.click.pt.x;
-			StringID str = 0;
-			CharSetFilter afilter = CS_ALPHANUMERAL;
+	CustomCurrencyWindow(const WindowDesc *desc) : Window(desc)
+	{
+		this->separator[0] = _custom_currency.separator;
+		this->separator[1] = '\0';
+		this->FindWindowPlacementAndResize(desc);
+	}
 
-			switch (line) {
-				case CUSTCURR_EXCHANGERATE:
-					if (IsInsideMM(x, 10, 30)) { // clicked buttons
-						if (x < 20) {
-							if (_custom_currency.rate > 1) _custom_currency.rate--;
-							WP(w, def_d).data_1 = 1 << (line * 2 + 0);
-						} else {
-							if (_custom_currency.rate < 5000) _custom_currency.rate++;
-							WP(w, def_d).data_1 = 1 << (line * 2 + 1);
-						}
-					} else { // enter text
-						SetDParam(0, _custom_currency.rate);
-						str = STR_CONFIG_PATCHES_INT32;
-						len = 4;
-						afilter = CS_NUMERAL;
-					}
-					break;
+	virtual void OnPaint()
+	{
+		int x;
+		int y = 20;
+		this->DrawWidgets();
 
-				case CUSTCURR_SEPARATOR:
-					if (IsInsideMM(x, 10, 30)) { // clicked button
-						WP(w, def_d).data_1 = 1 << (line * 2 + 1);
-					}
-					str = BindCString(_str_separator);
-					len = 1;
-					break;
+		/* exchange rate */
+		DrawArrowButtons(10, y, 3, GB(this->click, 0, 2), true, true);
+		SetDParam(0, 1);
+		SetDParam(1, 1);
+		DrawString(35, y + 1, STR_CURRENCY_EXCHANGE_RATE, TC_FROMSTRING);
+		y += 12;
 
-				case CUSTCURR_PREFIX:
-					if (IsInsideMM(x, 10, 30)) { // clicked button
-						WP(w, def_d).data_1 = 1 << (line * 2 + 1);
+		/* separator */
+		DrawFrameRect(10, y + 1, 29, y + 9, 0, GB(this->click, 2, 2) ? FR_LOWERED : FR_NONE);
+		x = DrawString(35, y + 1, STR_CURRENCY_SEPARATOR, TC_FROMSTRING);
+		DoDrawString(this->separator, x + 4, y + 1, TC_ORANGE);
+		y += 12;
+
+		/* prefix */
+		DrawFrameRect(10, y + 1, 29, y + 9, 0, GB(this->click, 4, 2) ? FR_LOWERED : FR_NONE);
+		x = DrawString(35, y + 1, STR_CURRENCY_PREFIX, TC_FROMSTRING);
+		DoDrawString(_custom_currency.prefix, x + 4, y + 1, TC_ORANGE);
+		y += 12;
+
+		/* suffix */
+		DrawFrameRect(10, y + 1, 29, y + 9, 0, GB(this->click, 6, 2) ? FR_LOWERED : FR_NONE);
+		x = DrawString(35, y + 1, STR_CURRENCY_SUFFIX, TC_FROMSTRING);
+		DoDrawString(_custom_currency.suffix, x + 4, y + 1, TC_ORANGE);
+		y += 12;
+
+		/* switch to euro */
+		DrawArrowButtons(10, y, 3, GB(this->click, 8, 2), true, true);
+		SetDParam(0, _custom_currency.to_euro);
+		DrawString(35, y + 1, (_custom_currency.to_euro != CF_NOEURO) ? STR_CURRENCY_SWITCH_TO_EURO : STR_CURRENCY_SWITCH_TO_EURO_NEVER, TC_FROMSTRING);
+		y += 12;
+
+		/* Preview */
+		y += 12;
+		SetDParam(0, 10000);
+		DrawString(35, y + 1, STR_CURRENCY_PREVIEW, TC_FROMSTRING);
+	}
+
+	virtual void OnClick(Point pt, int widget)
+	{
+		int line = (pt.y - 20) / 12;
+		int len = 0;
+		int x = pt.x;
+		StringID str = 0;
+		CharSetFilter afilter = CS_ALPHANUMERAL;
+
+		switch (line) {
+			case CUSTCURR_EXCHANGERATE:
+				if (IsInsideMM(x, 10, 30)) { // clicked buttons
+					if (x < 20) {
+						if (_custom_currency.rate > 1) _custom_currency.rate--;
+						this->click = 1 << (line * 2 + 0);
+					} else {
+						if (_custom_currency.rate < 5000) _custom_currency.rate++;
+						this->click = 1 << (line * 2 + 1);
 					}
-					str = BindCString(_custom_currency.prefix);
-					len = 12;
-					break;
-
-				case CUSTCURR_SUFFIX:
-					if (IsInsideMM(x, 10, 30)) { // clicked button
-						WP(w, def_d).data_1 = 1 << (line * 2 + 1);
-					}
-					str = BindCString(_custom_currency.suffix);
-					len = 12;
-					break;
-
-				case CUSTCURR_TO_EURO:
-					if (IsInsideMM(x, 10, 30)) { // clicked buttons
-						if (x < 20) {
-							_custom_currency.to_euro = (_custom_currency.to_euro <= 2000) ?
-								CF_NOEURO : _custom_currency.to_euro - 1;
-							WP(w, def_d).data_1 = 1 << (line * 2 + 0);
-						} else {
-							_custom_currency.to_euro =
-								Clamp(_custom_currency.to_euro + 1, 2000, MAX_YEAR);
-							WP(w, def_d).data_1 = 1 << (line * 2 + 1);
-						}
-					} else { // enter text
-						SetDParam(0, _custom_currency.to_euro);
-						str = STR_CONFIG_PATCHES_INT32;
-						len = 4;
-						afilter = CS_NUMERAL;
-					}
-					break;
-			}
-
-			if (len != 0) {
-				WP(w, def_d).data_2 = line;
-				ShowQueryString(str, STR_CURRENCY_CHANGE_PARAMETER, len + 1, 250, w, afilter);
-			}
-
-			w->flags4 |= 5 << WF_TIMEOUT_SHL;
-			w->SetDirty();
-		} break;
+				} else { // enter text
+					SetDParam(0, _custom_currency.rate);
+					str = STR_CONFIG_PATCHES_INT32;
+					len = 4;
+					afilter = CS_NUMERAL;
+				}
+				break;
 
-		case WE_ON_EDIT_TEXT: {
-			if (e->we.edittext.str == NULL) break;
-
-			const char *b = e->we.edittext.str;
-
-			switch (WP(w, def_d).data_2) {
-				case CUSTCURR_EXCHANGERATE:
-					_custom_currency.rate = Clamp(atoi(b), 1, 5000);
-					break;
-
-				case CUSTCURR_SEPARATOR: /* Thousands seperator */
-					_custom_currency.separator = StrEmpty(b) ? ' ' : b[0];
-					ttd_strlcpy(_str_separator, b, lengthof(_str_separator));
-					break;
-
-				case CUSTCURR_PREFIX:
-					ttd_strlcpy(_custom_currency.prefix, b, lengthof(_custom_currency.prefix));
-					break;
+			case CUSTCURR_SEPARATOR:
+				if (IsInsideMM(x, 10, 30)) { // clicked button
+					this->click = 1 << (line * 2 + 1);
+				}
+				str = BindCString(this->separator);
+				len = 1;
+				break;
 
-				case CUSTCURR_SUFFIX:
-					ttd_strlcpy(_custom_currency.suffix, b, lengthof(_custom_currency.suffix));
-					break;
+			case CUSTCURR_PREFIX:
+				if (IsInsideMM(x, 10, 30)) { // clicked button
+					this->click = 1 << (line * 2 + 1);
+				}
+				str = BindCString(_custom_currency.prefix);
+				len = 12;
+				break;
 
-				case CUSTCURR_TO_EURO: { /* Year to switch to euro */
-					int val = atoi(b);
+			case CUSTCURR_SUFFIX:
+				if (IsInsideMM(x, 10, 30)) { // clicked button
+					this->click = 1 << (line * 2 + 1);
+				}
+				str = BindCString(_custom_currency.suffix);
+				len = 12;
+				break;
 
-					_custom_currency.to_euro = (val < 2000 ? CF_NOEURO : min(val, MAX_YEAR));
-					break;
+			case CUSTCURR_TO_EURO:
+				if (IsInsideMM(x, 10, 30)) { // clicked buttons
+					if (x < 20) {
+						_custom_currency.to_euro = (_custom_currency.to_euro <= 2000) ?
+							CF_NOEURO : _custom_currency.to_euro - 1;
+						this->click = 1 << (line * 2 + 0);
+					} else {
+						_custom_currency.to_euro =
+							Clamp(_custom_currency.to_euro + 1, 2000, MAX_YEAR);
+						this->click = 1 << (line * 2 + 1);
+					}
+				} else { // enter text
+					SetDParam(0, _custom_currency.to_euro);
+					str = STR_CONFIG_PATCHES_INT32;
+					len = 4;
+					afilter = CS_NUMERAL;
 				}
+				break;
+		}
+
+		if (len != 0) {
+			this->query_widget = line;
+			ShowQueryString(str, STR_CURRENCY_CHANGE_PARAMETER, len + 1, 250, this, afilter);
+		}
+
+		this->flags4 |= 5 << WF_TIMEOUT_SHL;
+		this->SetDirty();
+	}
+
+	virtual void OnQueryTextFinished(char *str)
+	{
+		if (str == NULL) return;
+
+		switch (this->query_widget) {
+			case CUSTCURR_EXCHANGERATE:
+				_custom_currency.rate = Clamp(atoi(str), 1, 5000);
+				break;
+
+			case CUSTCURR_SEPARATOR: /* Thousands seperator */
+				_custom_currency.separator = StrEmpty(str) ? ' ' : str[0];
+				ttd_strlcpy(this->separator, str, lengthof(this->separator));
+				break;
+
+			case CUSTCURR_PREFIX:
+				ttd_strlcpy(_custom_currency.prefix, str, lengthof(_custom_currency.prefix));
+				break;
+
+			case CUSTCURR_SUFFIX:
+				ttd_strlcpy(_custom_currency.suffix, str, lengthof(_custom_currency.suffix));
+				break;
+
+			case CUSTCURR_TO_EURO: { /* Year to switch to euro */
+				int val = atoi(str);
+
+				_custom_currency.to_euro = (val < 2000 ? CF_NOEURO : min(val, MAX_YEAR));
+				break;
 			}
-			MarkWholeScreenDirty();
-		} break;
+		}
+		MarkWholeScreenDirty();
+	}
 
-		case WE_TIMEOUT:
-			WP(w, def_d).data_1 = 0;
-			w->SetDirty();
-			break;
-
-		case WE_DESTROY:
-			DeleteWindowById(WC_QUERY_STRING, 0);
-			MarkWholeScreenDirty();
-			break;
+	virtual void OnTimeout()
+	{
+		this->click = 0;
+		this->SetDirty();
 	}
-}
+};
 
 static const Widget _cust_currency_widgets[] = {
 {   WWT_CLOSEBOX,   RESIZE_NONE,    14,     0,    10,     0,    13, STR_00C5,            STR_018B_CLOSE_WINDOW},
@@ -1326,14 +1291,10 @@
 	WC_CUSTOM_CURRENCY, WC_NONE,
 	WDF_STD_TOOLTIPS | WDF_STD_BTN | WDF_DEF_WIDGET | WDF_UNCLICK_BUTTONS,
 	_cust_currency_widgets,
-	CustCurrencyWndProc,
 };
 
 static void ShowCustCurrency()
 {
-	_str_separator[0] = _custom_currency.separator;
-	_str_separator[1] = '\0';
-
 	DeleteWindowById(WC_CUSTOM_CURRENCY, 0);
-	new Window(&_cust_currency_desc);
+	new CustomCurrencyWindow(&_cust_currency_desc);
 }