(svn r7759) -Merge: makefile rewrite. This merge features:

 - A proper ./configure, so everything needs to be configured only once, not for every make.
 - Usage of makedepend when available. This greatly reduces the time needed for generating the dependencies.
 - A generator for all project files. There is a single file with sources, which is used to generate Makefiles and the project files for MSVC.
 - Proper support for OSX universal binaries.
 - Object files for non-MSVC compiles are also placed in separate directories, making is faster to switch between debug and release compiles and it does not touch the directory with the source files.
 - Functionality to make a bundle of all needed files for for example a nightly or distribution of a binary with all needed GRFs and language files.

Note: as this merge moves almost all files, it is recommended to make a backup of your working copy before updating your working copy.

1 files changed, 0 insertions, 2000 deletions

diff --git a/window.c b/window.c
deleted file mode 100644
index 1a12c7c6b..000000000
--- a/window.c
+++ /dev/null
@@ -1,2000 +0,0 @@
-/* $Id$ */
-
-#include "stdafx.h"
-#include <stdarg.h>
-#include "openttd.h"
-#include "debug.h"
-#include "functions.h"
-#include "map.h"
-#include "player.h"
-#include "window.h"
-#include "gfx.h"
-#include "viewport.h"
-#include "console.h"
-#include "variables.h"
-#include "table/sprites.h"
-#include "genworld.h"
-
-// delta between mouse cursor and upper left corner of dragged window
-static Point _drag_delta;
-
-static Window _windows[25];
-Window *_z_windows[lengthof(_windows)];
-Window **_last_z_window; ///< always points to the next free space in the z-array
-
-void CDECL SetWindowWidgetsDisabledState(Window *w, bool disab_stat, int widgets, ...)
-{
-	va_list wdg_list;
-
-	va_start(wdg_list, widgets);
-
-	while (widgets != WIDGET_LIST_END) {
-		SetWindowWidgetDisabledState(w, widgets, disab_stat);
-		widgets = va_arg(wdg_list, int);
-	}
-
-	va_end(wdg_list);
-}
-
-void CDECL SetWindowWidgetsHiddenState(Window *w, bool hidden_stat, int widgets, ...)
-{
-	va_list wdg_list;
-
-	va_start(wdg_list, widgets);
-
-	while (widgets != WIDGET_LIST_END) {
-		SetWindowWidgetHiddenState(w, widgets, hidden_stat);
-		widgets = va_arg(wdg_list, int);
-	}
-
-	va_end(wdg_list);
-}
-
-void CDECL SetWindowWidgetsLoweredState(Window *w, bool lowered_stat, int widgets, ...)
-{
-	va_list wdg_list;
-
-	va_start(wdg_list, widgets);
-
-	while (widgets != WIDGET_LIST_END) {
-		SetWindowWidgetLoweredState(w, widgets, lowered_stat);
-		widgets = va_arg(wdg_list, int);
-	}
-
-	va_end(wdg_list);
-}
-
-void RaiseWindowButtons(Window *w)
-{
-	uint i;
-
-	for (i = 0; i < w->widget_count; i++) {
-		if (IsWindowWidgetLowered(w, i)) {
-			RaiseWindowWidget(w, i);
-			InvalidateWidget(w, i);
-		}
-	}
-}
-
-void HandleButtonClick(Window *w, byte widget)
-{
-	LowerWindowWidget(w, widget);
-	w->flags4 |= 5 << WF_TIMEOUT_SHL;
-	InvalidateWidget(w, widget);
-}
-
-
-static void StartWindowDrag(Window *w);
-static void StartWindowSizing(Window *w);
-
-static void DispatchLeftClickEvent(Window *w, int x, int y)
-{
-	WindowEvent e;
-	const Widget *wi;
-
-	e.we.click.pt.x = x;
-	e.we.click.pt.y = y;
-	e.event = WE_CLICK;
-
-	if (w->desc_flags & WDF_DEF_WIDGET) {
-		e.we.click.widget = GetWidgetFromPos(w, x, y);
-		if (e.we.click.widget < 0) return; /* exit if clicked outside of widgets */
-
-		/* don't allow any interaction if the button has been disabled */
-		if (IsWindowWidgetDisabled(w, e.we.click.widget)) return;
-
-		wi = &w->widget[e.we.click.widget];
-
-		if (wi->type & WWB_MASK) {
-			/* special widget handling for buttons*/
-			switch (wi->type) {
-				case WWT_PANEL   | WWB_PUSHBUTTON: /* WWT_PUSHBTN */
-				case WWT_IMGBTN  | WWB_PUSHBUTTON: /* WWT_PUSHIMGBTN */
-				case WWT_TEXTBTN | WWB_PUSHBUTTON: /* WWT_PUSHTXTBTN */
-					HandleButtonClick(w, e.we.click.widget);
-					break;
-			}
-		} else if (wi->type == WWT_SCROLLBAR || wi->type == WWT_SCROLL2BAR || wi->type == WWT_HSCROLLBAR) {
-			ScrollbarClickHandler(w, wi, e.we.click.pt.x, e.we.click.pt.y);
-		}
-
-		if (w->desc_flags & WDF_STD_BTN) {
-			if (e.we.click.widget == 0) { /* 'X' */
-				DeleteWindow(w);
-				return;
-			}
-
-			if (e.we.click.widget == 1) { /* 'Title bar' */
-				StartWindowDrag(w);
-				return;
-			}
-		}
-
-		if (w->desc_flags & WDF_RESIZABLE && wi->type == WWT_RESIZEBOX) {
-			StartWindowSizing(w);
-			InvalidateWidget(w, e.we.click.widget);
-			return;
-		}
-
-		if (w->desc_flags & WDF_STICKY_BUTTON && wi->type == WWT_STICKYBOX) {
-			w->flags4 ^= WF_STICKY;
-			InvalidateWidget(w, e.we.click.widget);
-			return;
-		}
-	}
-
-	w->wndproc(w, &e);
-}
-
-static void DispatchRightClickEvent(Window *w, int x, int y)
-{
-	WindowEvent e;
-
-	/* default tooltips handler? */
-	if (w->desc_flags & WDF_STD_TOOLTIPS) {
-		e.we.click.widget = GetWidgetFromPos(w, x, y);
-		if (e.we.click.widget < 0)
-			return; /* exit if clicked outside of widgets */
-
-		if (w->widget[e.we.click.widget].tooltips != 0) {
-			GuiShowTooltips(w->widget[e.we.click.widget].tooltips);
-			return;
-		}
-	}
-
-	e.event = WE_RCLICK;
-	e.we.click.pt.x = x;
-	e.we.click.pt.y = y;
-	w->wndproc(w, &e);
-}
-
-/** Dispatch the mousewheel-action to the window which will scroll any
- * compatible scrollbars if the mouse is pointed over the bar or its contents
- * @param *w Window
- * @param widget the widget where the scrollwheel was used
- * @param wheel scroll up or down
- */
-static void DispatchMouseWheelEvent(Window *w, int widget, int wheel)
-{
-	const Widget *wi1, *wi2;
-	Scrollbar *sb;
-
-	if (widget < 0) return;
-
-	wi1 = &w->widget[widget];
-	wi2 = &w->widget[widget + 1];
-
-	/* The listbox can only scroll if scrolling was done on the scrollbar itself,
-	 * or on the listbox (and the next item is (must be) the scrollbar)
-	 * XXX - should be rewritten as a widget-dependent scroller but that's
-	 * not happening until someone rewrites the whole widget-code */
-	if ((sb = &w->vscroll,  wi1->type == WWT_SCROLLBAR)  || (sb = &w->vscroll2, wi1->type == WWT_SCROLL2BAR)  ||
-			(sb = &w->vscroll2, wi2->type == WWT_SCROLL2BAR) || (sb = &w->vscroll, wi2->type == WWT_SCROLLBAR) ) {
-
-		if (sb->count > sb->cap) {
-			int pos = clamp(sb->pos + wheel, 0, sb->count - sb->cap);
-			if (pos != sb->pos) {
-				sb->pos = pos;
-				SetWindowDirty(w);
-			}
-		}
-	}
-}
-
-static void DrawOverlappedWindow(Window* const *wz, int left, int top, int right, int bottom);
-
-void DrawOverlappedWindowForAll(int left, int top, int right, int bottom)
-{
-	Window* const *wz;
-	DrawPixelInfo bk;
-	_cur_dpi = &bk;
-
-	FOR_ALL_WINDOWS(wz) {
-		const Window *w = *wz;
-		if (right > w->left &&
-				bottom > w->top &&
-				left < w->left + w->width &&
-				top < w->top + w->height) {
-			DrawOverlappedWindow(wz, left, top, right, bottom);
-		}
-	}
-}
-
-static void DrawOverlappedWindow(Window* const *wz, int left, int top, int right, int bottom)
-{
-	Window* const *vz = wz;
-	int x;
-
-	while (++vz != _last_z_window) {
-		const Window *v = *vz;
-
-		if (right > v->left &&
-				bottom > v->top &&
-				left < v->left + v->width &&
-				top < v->top + v->height) {
-			if (left < (x=v->left)) {
-				DrawOverlappedWindow(wz, left, top, x, bottom);
-				DrawOverlappedWindow(wz, x, top, right, bottom);
-				return;
-			}
-
-			if (right > (x=v->left + v->width)) {
-				DrawOverlappedWindow(wz, left, top, x, bottom);
-				DrawOverlappedWindow(wz, x, top, right, bottom);
-				return;
-			}
-
-			if (top < (x=v->top)) {
-				DrawOverlappedWindow(wz, left, top, right, x);
-				DrawOverlappedWindow(wz, left, x, right, bottom);
-				return;
-			}
-
-			if (bottom > (x=v->top + v->height)) {
-				DrawOverlappedWindow(wz, left, top, right, x);
-				DrawOverlappedWindow(wz, left, x, right, bottom);
-				return;
-			}
-
-			return;
-		}
-	}
-
-	{
-		DrawPixelInfo *dp = _cur_dpi;
-		dp->width = right - left;
-		dp->height = bottom - top;
-		dp->left = left - (*wz)->left;
-		dp->top = top - (*wz)->top;
-		dp->pitch = _screen.pitch;
-		dp->dst_ptr = _screen.dst_ptr + top * _screen.pitch + left;
-		dp->zoom = 0;
-		CallWindowEventNP(*wz, WE_PAINT);
-	}
-}
-
-void CallWindowEventNP(Window *w, int event)
-{
-	WindowEvent e;
-
-	e.event = event;
-	w->wndproc(w, &e);
-}
-
-void SetWindowDirty(const Window *w)
-{
-	if (w == NULL) return;
-	SetDirtyBlocks(w->left, w->top, w->left + w->width, w->top + w->height);
-}
-
-/** Find the Window whose parent pointer points to this window
- * @parent w Window to find child of
- * @return return a Window pointer that is the child of w, or NULL otherwise */
-static Window *FindChildWindow(const Window *w)
-{
-	Window* const *wz;
-
-	FOR_ALL_WINDOWS(wz) {
-		Window *v = *wz;
-		if (v->parent == w) return v;
-	}
-
-	return NULL;
-}
-
-/** Find the z-value of a window. A window must already be open
- * or the behaviour is undefined but function should never fail */
-Window **FindWindowZPosition(const Window *w)
-{
-	Window **wz;
-
-	for (wz = _z_windows; wz != _last_z_window; wz++) {
-		if (*wz == w) return wz;
-	}
-
-	DEBUG(misc, 3, "Window (class %d, number %d) is not open, probably removed by recursive calls",
-		w->window_class, w->window_number);
-	return NULL;
-}
-
-void DeleteWindow(Window *w)
-{
-	Window *v;
-	Window **wz;
-	if (w == NULL) return;
-
-	/* Delete any children a window might have in a head-recursive manner */
-	v = FindChildWindow(w);
-	if (v != NULL) DeleteWindow(v);
-
-	if (_thd.place_mode != VHM_NONE &&
-			_thd.window_class == w->window_class &&
-			_thd.window_number == w->window_number) {
-		ResetObjectToPlace();
-	}
-
-	CallWindowEventNP(w, WE_DESTROY);
-	if (w->viewport != NULL) DeleteWindowViewport(w);
-
-	SetWindowDirty(w);
-	free(w->widget);
-	w->widget = NULL;
-	w->widget_count = 0;
-	w->parent = NULL;
-
-	/* Find the window in the z-array, and effectively remove it
-	 * by moving all windows after it one to the left */
-	wz = FindWindowZPosition(w);
-	if (wz == NULL) return;
-	memmove(wz, wz + 1, (byte*)_last_z_window - (byte*)wz);
-	_last_z_window--;
-}
-
-Window *FindWindowById(WindowClass cls, WindowNumber number)
-{
-	Window* const *wz;
-
-	FOR_ALL_WINDOWS(wz) {
-		Window *w = *wz;
-		if (w->window_class == cls && w->window_number == number) return w;
-	}
-
-	return NULL;
-}
-
-void DeleteWindowById(WindowClass cls, WindowNumber number)
-{
-	DeleteWindow(FindWindowById(cls, number));
-}
-
-void DeleteWindowByClass(WindowClass cls)
-{
-	Window* const *wz;
-
-restart_search:
-	/* When we find the window to delete, we need to restart the search
-	 * as deleting this window could cascade in deleting (many) others
-	 * anywhere in the z-array */
-	FOR_ALL_WINDOWS(wz) {
-		Window *w = *wz;
-		if (w->window_class == cls) {
-			DeleteWindow(w);
-			goto restart_search;
-		}
-	}
-}
-
-/** Delete all windows of a player. We identify windows of a player
- * by looking at the caption colour. If it is equal to the player ID
- * then we say the window belongs to the player and should be deleted
- * @param id PlayerID player identifier */
-void DeletePlayerWindows(PlayerID id)
-{
-	Window* const *wz;
-
-restart_search:
-	/* When we find the window to delete, we need to restart the search
-	 * as deleting this window could cascade in deleting (many) others
-	 * anywhere in the z-array */
-	FOR_ALL_WINDOWS(wz) {
-		Window *w = *wz;
-		if (w->caption_color == id) {
-			DeleteWindow(w);
-			goto restart_search;
-		}
-	}
-
-	/* Also delete the player specific windows, that don't have a player-colour */
-	DeleteWindowById(WC_BUY_COMPANY, id);
-}
-
-/** Change the owner of all the windows one player can take over from another
- * player in the case of a company merger. Do not change ownership of windows
- * that need to be deleted once takeover is complete
- * @param old_player PlayerID of original owner of the window
- * @param new_player PlayerID of the new owner of the window */
-void ChangeWindowOwner(PlayerID old_player, PlayerID new_player)
-{
-	Window* const *wz;
-
-	FOR_ALL_WINDOWS(wz) {
-		Window *w = *wz;
-
-		if (w->caption_color != old_player)      continue;
-		if (w->window_class == WC_PLAYER_COLOR)  continue;
-		if (w->window_class == WC_FINANCES)      continue;
-		if (w->window_class == WC_STATION_LIST)  continue;
-		if (w->window_class == WC_TRAINS_LIST)   continue;
-		if (w->window_class == WC_ROADVEH_LIST)  continue;
-		if (w->window_class == WC_SHIPS_LIST)    continue;
-		if (w->window_class == WC_AIRCRAFT_LIST) continue;
-		if (w->window_class == WC_BUY_COMPANY)   continue;
-		if (w->window_class == WC_COMPANY)       continue;
-
-		w->caption_color = new_player;
-	}
-}
-
-static void BringWindowToFront(const Window *w);
-
-/** Find a window and make it the top-window on the screen. The window
- * gets a white border for a brief period of time to visualize its
- * "activation"
- * @return a pointer to the window thus activated */
-Window *BringWindowToFrontById(WindowClass cls, WindowNumber number)
-{
-	Window *w = FindWindowById(cls, number);
-
-	if (w != NULL) {
-		w->flags4 |= WF_WHITE_BORDER_MASK;
-		BringWindowToFront(w);
-		SetWindowDirty(w);
-	}
-
-	return w;
-}
-
-static inline bool IsVitalWindow(const Window *w)
-{
-	WindowClass wc = w->window_class;
-	return (wc == WC_MAIN_TOOLBAR || wc == WC_STATUS_BAR || wc == WC_NEWS_WINDOW || wc == WC_SEND_NETWORK_MSG);
-}
-
-/** On clicking on a window, make it the frontmost window of all. However
- * there are certain windows that always need to be on-top; these include
- * - Toolbar, Statusbar (always on)
- * - New window, Chatbar (only if open)
- * The window is marked dirty for a repaint if the window is actually moved
- * @param w window that is put into the foreground
- * @return pointer to the window, the same as the input pointer
- */
-static void BringWindowToFront(const Window *w)
-{
-	Window *tempz;
-	Window **wz = FindWindowZPosition(w);
-	Window **vz = _last_z_window;
-
-	/* Bring the window just below the vital windows */
-	do {
-		if (--vz < _z_windows) return;
-	} while (IsVitalWindow(*vz));
-
-	if (wz == vz) return; // window is already in the right position
-	assert(wz < vz);
-
-	tempz = *wz;
-	memmove(wz, wz + 1, (byte*)vz - (byte*)wz);
-	*vz = tempz;
-
-	SetWindowDirty(w);
-}
-
-/** We have run out of windows, so find a suitable candidate for replacement.
- * Keep all important windows intact. These are
- * - Main window (gamefield), Toolbar, Statusbar (always on)
- * - News window, Chatbar (when on)
- * - Any sticked windows since we wanted to keep these
- * @return w pointer to the window that is going to be deleted
- */
-static Window *FindDeletableWindow(void)
-{
-	Window* const *wz;
-
-	FOR_ALL_WINDOWS(wz) {
-		Window *w = *wz;
-		if (w->window_class != WC_MAIN_WINDOW && !IsVitalWindow(w) && !(w->flags4 & WF_STICKY)) {
-			return w;
-		}
-	}
-	return NULL;
-}
-
-/** A window must be freed, and all are marked as important windows. Ease the
- * restriction a bit by allowing to delete sticky windows. Keep important/vital
- * windows intact (Main window, Toolbar, Statusbar, News Window, Chatbar)
- * Start finding an appropiate candidate from the lowest z-values (bottom)
- * @see FindDeletableWindow()
- * @return w Pointer to the window that is being deleted
- */
-static Window *ForceFindDeletableWindow(void)
-{
-	Window* const *wz;
-
-	for (wz = _z_windows;; wz++) {
-		Window *w = *wz;
-		assert(wz < _last_z_window);
-		if (w->window_class != WC_MAIN_WINDOW && !IsVitalWindow(w)) return w;
-	}
-}
-
-bool IsWindowOfPrototype(const Window *w, const Widget *widget)
-{
-	return (w->original_widget == widget);
-}
-
-/* Copies 'widget' to 'w->widget' to allow for resizable windows */
-void AssignWidgetToWindow(Window *w, const Widget *widget)
-{
-	w->original_widget = widget;
-
-	if (widget != NULL) {
-		uint index = 1;
-		const Widget *wi;
-
-		for (wi = widget; wi->type != WWT_LAST; wi++) index++;
-
-		w->widget = realloc(w->widget, sizeof(*w->widget) * index);
-		memcpy(w->widget, widget, sizeof(*w->widget) * index);
-		w->widget_count = index - 1;
-	} else {
-		w->widget = NULL;
-		w->widget_count = 0;
-	}
-}
-
-static Window *FindFreeWindow(void)
-{
-	Window *w;
-
-	for (w = _windows; w < endof(_windows); w++) {
-		Window* const *wz;
-		bool window_in_use = false;
-
-		FOR_ALL_WINDOWS(wz) {
-			if (*wz == w) {
-				window_in_use = true;
-				break;
-			}
-		}
-
-		if (!window_in_use) return w;
-	}
-
-	assert(_last_z_window == endof(_z_windows));
-	return NULL;
-}
-
-/* Open a new window.
- * This function is called from AllocateWindow() or AllocateWindowDesc()
- * See descriptions for those functions for usage
- * See AllocateWindow() for description of arguments.
- * Only addition here is window_number, which is the window_number being assigned to the new window
- */
-static Window *LocalAllocateWindow(
-							int x, int y, int width, int height,
-							WindowProc *proc, WindowClass cls, const Widget *widget, int window_number)
-{
-	Window *w = FindFreeWindow();
-
-	/* We have run out of windows, close one and use that as the place for our new one */
-	if (w == NULL) {
-		w = FindDeletableWindow();
-		if (w == NULL) w = ForceFindDeletableWindow();
-		DeleteWindow(w);
-	}
-
-	// Set up window properties
-	memset(w, 0, sizeof(*w));
-	w->window_class = cls;
-	w->flags4 = WF_WHITE_BORDER_MASK; // just opened windows have a white border
-	w->caption_color = 0xFF;
-	w->left = x;
-	w->top = y;
-	w->width = width;
-	w->height = height;
-	w->wndproc = proc;
-	AssignWidgetToWindow(w, widget);
-	w->resize.width = width;
-	w->resize.height = height;
-	w->resize.step_width = 1;
-	w->resize.step_height = 1;
-	w->window_number = window_number;
-
-	{
-		Window **wz = _last_z_window;
-
-		/* Hacky way of specifying always-on-top windows. These windows are
-		 * always above other windows because they are moved below them.
-		 * status-bar is above news-window because it has been created earlier.
-		 * Also, as the chat-window is excluded from this, it will always be
-		 * the last window, thus always on top.
-		 * XXX - Yes, ugly, probably needs something like w->always_on_top flag
-		 * to implement correctly, but even then you need some kind of distinction
-		 * between on-top of chat/news and status windows, because these conflict */
-		if (wz != _z_windows && w->window_class != WC_SEND_NETWORK_MSG) {
-			if (FindWindowById(WC_MAIN_TOOLBAR, 0)     != NULL) wz--;
-			if (FindWindowById(WC_STATUS_BAR, 0)       != NULL) wz--;
-			if (FindWindowById(WC_NEWS_WINDOW, 0)      != NULL) wz--;
-			if (FindWindowById(WC_SEND_NETWORK_MSG, 0) != NULL) wz--;
-
-			assert(wz >= _z_windows);
-			if (wz != _last_z_window) memmove(wz + 1, wz, (byte*)_last_z_window - (byte*)wz);
-		}
-
-		*wz = w;
-		_last_z_window++;
-	}
-
-	SetWindowDirty(w);
-	CallWindowEventNP(w, WE_CREATE);
-
-	return w;
-}
-
-/**
- * Open a new window. If there is no space for a new window, close an open
- * window. Try to avoid stickied windows, but if there is no else, close one of
- * those as well. Then make sure all created windows are below some always-on-top
- * ones. Finally set all variables and call the WE_CREATE event
- * @param x offset in pixels from the left of the screen
- * @param y offset in pixels from the top of the screen
- * @param width width in pixels of the window
- * @param height height in pixels of the window
- * @param *proc @see WindowProc function to call when any messages/updates happen to the window
- * @param cls @see WindowClass class of the window, used for identification and grouping
- * @param *widget @see Widget pointer to the window layout and various elements
- * @return @see Window pointer of the newly created window
- */
-Window *AllocateWindow(
-							int x, int y, int width, int height,
-							WindowProc *proc, WindowClass cls, const Widget *widget)
-{
-	return LocalAllocateWindow(x, y, width, height, proc, cls, widget, 0);
-}
-
-typedef struct SizeRect {
-	int left,top,width,height;
-} SizeRect;
-
-
-static SizeRect _awap_r;
-
-static bool IsGoodAutoPlace1(int left, int top)
-{
-	int right,bottom;
-	Window* const *wz;
-
-	_awap_r.left= left;
-	_awap_r.top = top;
-	right = _awap_r.width + left;
-	bottom = _awap_r.height + top;
-
-	if (left < 0 || top < 22 || right > _screen.width || bottom > _screen.height)
-		return false;
-
-	// Make sure it is not obscured by any window.
-	FOR_ALL_WINDOWS(wz) {
-		const Window *w = *wz;
-		if (w->window_class == WC_MAIN_WINDOW) continue;
-
-		if (right > w->left &&
-				w->left + w->width > left &&
-				bottom > w->top &&
-				w->top + w->height > top) {
-			return false;
-		}
-	}
-
-	return true;
-}
-
-static bool IsGoodAutoPlace2(int left, int top)
-{
-	int width,height;
-	Window* const *wz;
-
-	_awap_r.left= left;
-	_awap_r.top = top;
-	width = _awap_r.width;
-	height = _awap_r.height;
-
-	if (left < -(width>>2) || left > _screen.width - (width>>1)) return false;
-	if (top < 22 || top > _screen.height - (height>>2)) return false;
-
-	// Make sure it is not obscured by any window.
-	FOR_ALL_WINDOWS(wz) {
-		const Window *w = *wz;
-		if (w->window_class == WC_MAIN_WINDOW) continue;
-
-		if (left + width > w->left &&
-				w->left + w->width > left &&
-				top + height > w->top &&
-				w->top + w->height > top) {
-			return false;
-		}
-	}
-
-	return true;
-}
-
-static Point GetAutoPlacePosition(int width, int height)
-{
-	Window* const *wz;
-	Point pt;
-
-	_awap_r.width = width;
-	_awap_r.height = height;
-
-	if (IsGoodAutoPlace1(0, 24)) goto ok_pos;
-
-	FOR_ALL_WINDOWS(wz) {
-		const Window *w = *wz;
-		if (w->window_class == WC_MAIN_WINDOW) continue;
-
-		if (IsGoodAutoPlace1(w->left+w->width+2,w->top)) goto ok_pos;
-		if (IsGoodAutoPlace1(w->left-   width-2,w->top)) goto ok_pos;
-		if (IsGoodAutoPlace1(w->left,w->top+w->height+2)) goto ok_pos;
-		if (IsGoodAutoPlace1(w->left,w->top-   height-2)) goto ok_pos;
-		if (IsGoodAutoPlace1(w->left+w->width+2,w->top+w->height-height)) goto ok_pos;
-		if (IsGoodAutoPlace1(w->left-   width-2,w->top+w->height-height)) goto ok_pos;
-		if (IsGoodAutoPlace1(w->left+w->width-width,w->top+w->height+2)) goto ok_pos;
-		if (IsGoodAutoPlace1(w->left+w->width-width,w->top-   height-2)) goto ok_pos;
-	}
-
-	FOR_ALL_WINDOWS(wz) {
-		const Window *w = *wz;
-		if (w->window_class == WC_MAIN_WINDOW) continue;
-
-		if (IsGoodAutoPlace2(w->left+w->width+2,w->top)) goto ok_pos;
-		if (IsGoodAutoPlace2(w->left-   width-2,w->top)) goto ok_pos;
-		if (IsGoodAutoPlace2(w->left,w->top+w->height+2)) goto ok_pos;
-		if (IsGoodAutoPlace2(w->left,w->top-   height-2)) goto ok_pos;
-	}
-
-	{
-		int left=0,top=24;
-
-restart:;
-		FOR_ALL_WINDOWS(wz) {
-			const Window *w = *wz;
-
-			if (w->left == left && w->top == top) {
-				left += 5;
-				top += 5;
-				goto restart;
-			}
-		}
-
-		pt.x = left;
-		pt.y = top;
-		return pt;
-	}
-
-ok_pos:;
-	pt.x = _awap_r.left;
-	pt.y = _awap_r.top;
-	return pt;
-}
-
-static Window *LocalAllocateWindowDesc(const WindowDesc *desc, int window_number)
-{
-	Point pt;
-	Window *w;
-
-	/* By default position a child window at an offset of 10/10 of its parent.
-	 * However if it falls too extremely outside window positions, reposition
-	 * it to an automatic place */
-	if (desc->parent_cls != 0 /* WC_MAIN_WINDOW */ &&
-			(w = FindWindowById(desc->parent_cls, window_number)) != NULL &&
-			w->left < _screen.width - 20 && w->left > -60 && w->top < _screen.height - 20) {
-
-		pt.x = w->left + 10;
-		if (pt.x > _screen.width + 10 - desc->width) {
-			pt.x = (_screen.width + 10 - desc->width) - 20;
-		}
-		pt.y = w->top + 10;
-	} else {
-		switch (desc->left) {
-			case WDP_ALIGN_TBR: { /* Align the right side with the top toolbar */
-				w = FindWindowById(WC_MAIN_TOOLBAR, 0);
-				pt.x = (w->left + w->width) - desc->width;
-			}	break;
-			case WDP_ALIGN_TBL: /* Align the left side with the top toolbar */
-				pt.x = FindWindowById(WC_MAIN_TOOLBAR, 0)->left;
-				break;
-			case WDP_AUTO: /* Find a good automatic position for the window */
-				pt = GetAutoPlacePosition(desc->width, desc->height);
-				goto allocate_window;
-			case WDP_CENTER: /* Centre the window horizontally */
-				pt.x = (_screen.width - desc->width) / 2;
-				break;
-			default:
-				pt.x = desc->left;
-				if (pt.x < 0) pt.x += _screen.width; // negative is from right of the screen
-		}
-
-		switch (desc->top) {
-			case WDP_CENTER: /* Centre the window vertically */
-				pt.y = (_screen.height - desc->height) / 2;
-				break;
-			/* WDP_AUTO sets the position at once and is controlled by desc->left.
-			 * Both left and top must be set to WDP_AUTO */
-			case WDP_AUTO:
-				NOT_REACHED();
-				assert(desc->left == WDP_AUTO && desc->top != WDP_AUTO);
-				/* fallthrough */
-			default:
-				pt.y = desc->top;
-				if (pt.y < 0) pt.y += _screen.height; // negative is from bottom of the screen
-				break;
-		}
-	}
-
-allocate_window:
-	w = LocalAllocateWindow(pt.x, pt.y, desc->width, desc->height, desc->proc, desc->cls, desc->widgets, window_number);
-	w->desc_flags = desc->flags;
-	return w;
-}
-
-/**
- * Open a new window.
- * @param *desc The pointer to the WindowDesc to be created
- * @return @see Window pointer of the newly created window
- */
-Window *AllocateWindowDesc(const WindowDesc *desc)
-{
-	return LocalAllocateWindowDesc(desc, 0);
-}
-
-/**
- * Open a new window.
- * @param *desc The pointer to the WindowDesc to be created
- * @param window_number the window number of the new window
- * @return @see Window pointer of the newly created window
- */
-Window *AllocateWindowDescFront(const WindowDesc *desc, int window_number)
-{
-	Window *w;
-
-	if (BringWindowToFrontById(desc->cls, window_number)) return NULL;
-	w = LocalAllocateWindowDesc(desc, window_number);
-	return w;
-}
-
-/** Do a search for a window at specific coordinates. For this we start
- * at the topmost window, obviously and work our way down to the bottom
- * @return a pointer to the found window if any, NULL otherwise */
-Window *FindWindowFromPt(int x, int y)
-{
-	Window* const *wz;
-
-	for (wz = _last_z_window; wz != _z_windows;) {
-		Window *w = *--wz;
-		if (IS_INSIDE_1D(x, w->left, w->width) && IS_INSIDE_1D(y, w->top, w->height)) {
-			return w;
-		}
-	}
-
-	return NULL;
-}
-
-void InitWindowSystem(void)
-{
-	IConsoleClose();
-
-	memset(&_windows, 0, sizeof(_windows));
-	_last_z_window = _z_windows;
-	InitViewports();
-	_no_scroll = 0;
-}
-
-void UnInitWindowSystem(void)
-{
-	Window **wz;
-	/* Delete all malloced widgets, and reset z-array */
-	FOR_ALL_WINDOWS(wz) {
-		free((*wz)->widget);
-		(*wz)->widget = NULL;
-		(*wz)->widget_count = 0;
-		*wz = NULL;
-	}
-	_last_z_window = _z_windows;
-}
-
-void ResetWindowSystem(void)
-{
-	UnInitWindowSystem();
-	InitWindowSystem();
-	_thd.pos.x = 0;
-	_thd.pos.y = 0;
-	_thd.new_pos.x = 0;
-	_thd.new_pos.y = 0;
-}
-
-static void DecreaseWindowCounters(void)
-{
-	Window *w;
-	Window* const *wz;
-
-	for (wz = _last_z_window; wz != _z_windows;) {
-		w = *--wz;
-		// Unclick scrollbar buttons if they are pressed.
-		if (w->flags4 & (WF_SCROLL_DOWN | WF_SCROLL_UP)) {
-			w->flags4 &= ~(WF_SCROLL_DOWN | WF_SCROLL_UP);
-			SetWindowDirty(w);
-		}
-		CallWindowEventNP(w, WE_MOUSELOOP);
-	}
-
-	for (wz = _last_z_window; wz != _z_windows;) {
-		w = *--wz;
-
-		if (w->flags4&WF_TIMEOUT_MASK && !(--w->flags4&WF_TIMEOUT_MASK)) {
-			CallWindowEventNP(w, WE_TIMEOUT);
-			if (w->desc_flags & WDF_UNCLICK_BUTTONS) RaiseWindowButtons(w);
-		}
-	}
-}
-
-Window *GetCallbackWnd(void)
-{
-	return FindWindowById(_thd.window_class, _thd.window_number);
-}
-
-static void HandlePlacePresize(void)
-{
-	Window *w;
-	WindowEvent e;
-
-	if (_special_mouse_mode != WSM_PRESIZE) return;
-
-	w = GetCallbackWnd();
-	if (w == NULL) return;
-
-	e.we.place.pt = GetTileBelowCursor();
-	if (e.we.place.pt.x == -1) {
-		_thd.selend.x = -1;
-		return;
-	}
-	e.we.place.tile = TileVirtXY(e.we.place.pt.x, e.we.place.pt.y);
-	e.event = WE_PLACE_PRESIZE;
-	w->wndproc(w, &e);
-}
-
-static bool HandleDragDrop(void)
-{
-	Window *w;
-	WindowEvent e;
-
-	if (_special_mouse_mode != WSM_DRAGDROP) return true;
-
-	if (_left_button_down) return false;
-
-	w = GetCallbackWnd();
-
-	ResetObjectToPlace();
-
-	if (w != NULL) {
-		// send an event in client coordinates.
-		e.event = WE_DRAGDROP;
-		e.we.dragdrop.pt.x = _cursor.pos.x - w->left;
-		e.we.dragdrop.pt.y = _cursor.pos.y - w->top;
-		e.we.dragdrop.widget = GetWidgetFromPos(w, e.we.dragdrop.pt.x, e.we.dragdrop.pt.y);
-		w->wndproc(w, &e);
-	}
-	return false;
-}
-
-static bool HandlePopupMenu(void)
-{
-	Window *w;
-	WindowEvent e;
-
-	if (!_popup_menu_active) return true;
-
-	w = FindWindowById(WC_TOOLBAR_MENU, 0);
-	if (w == NULL) {
-		_popup_menu_active = false;
-		return false;
-	}
-
-	if (_left_button_down) {
-		e.event = WE_POPUPMENU_OVER;
-		e.we.popupmenu.pt = _cursor.pos;
-	} else {
-		_popup_menu_active = false;
-		e.event = WE_POPUPMENU_SELECT;
-		e.we.popupmenu.pt = _cursor.pos;
-	}
-
-	w->wndproc(w, &e);
-
-	return false;
-}
-
-static bool HandleMouseOver(void)
-{
-	Window *w;
-	WindowEvent e;
-	static Window *last_w = NULL;
-
-	w = FindWindowFromPt(_cursor.pos.x, _cursor.pos.y);
-
-	// We changed window, put a MOUSEOVER event to the last window
-	if (last_w != NULL && last_w != w) {
-		e.event = WE_MOUSEOVER;
-		e.we.mouseover.pt.x = -1;
-		e.we.mouseover.pt.y = -1;
-		if (last_w->wndproc) last_w->wndproc(last_w, &e);
-	}
-	last_w = w;
-
-	if (w != NULL) {
-		// send an event in client coordinates.
-		e.event = WE_MOUSEOVER;
-		e.we.mouseover.pt.x = _cursor.pos.x - w->left;
-		e.we.mouseover.pt.y = _cursor.pos.y - w->top;
-		if (w->widget != NULL) {
-			e.we.mouseover.widget = GetWidgetFromPos(w, e.we.mouseover.pt.x, e.we.mouseover.pt.y);
-		}
-		w->wndproc(w, &e);
-	}
-
-	// Mouseover never stops execution
-	return true;
-}
-
-/** Update all the widgets of a window based on their resize flags
- * Both the areas of the old window and the new sized window are set dirty
- * ensuring proper redrawal.
- * @param w Window to resize
- * @param x delta x-size of changed window (positive if larger, etc.(
- * @param y delta y-size of changed window */
-void ResizeWindow(Window *w, int x, int y)
-{
-	Widget *wi;
-	bool resize_height = false;
-	bool resize_width = false;
-
-	if (x == 0 && y == 0) return;
-
-	SetWindowDirty(w);
-	for (wi = w->widget; wi->type != WWT_LAST; wi++) {
-		/* Isolate the resizing flags */
-		byte rsizeflag = GB(wi->display_flags, 0, 4);
-
-		if (rsizeflag == RESIZE_NONE) continue;
-
-		/* Resize the widget based on its resize-flag */
-		if (rsizeflag & RESIZE_LEFT) {
-			wi->left += x;
-			resize_width = true;
-		}
-
-		if (rsizeflag & RESIZE_RIGHT) {
-			wi->right += x;
-			resize_width = true;
-		}
-
-		if (rsizeflag & RESIZE_TOP) {
-			wi->top += y;
-			resize_height = true;
-		}
-
-		if (rsizeflag & RESIZE_BOTTOM) {
-			wi->bottom += y;
-			resize_height = true;
-		}
-	}
-
-	/* We resized at least 1 widget, so let's resize the window totally */
-	if (resize_width)  w->width  += x;
-	if (resize_height) w->height += y;
-
-	SetWindowDirty(w);
-}
-
-static bool _dragging_window;
-
-static bool HandleWindowDragging(void)
-{
-	Window* const *wz;
-	// Get out immediately if no window is being dragged at all.
-	if (!_dragging_window) return true;
-
-	// Otherwise find the window...
-	FOR_ALL_WINDOWS(wz) {
-		Window *w = *wz;
-
-		if (w->flags4 & WF_DRAGGING) {
-			const Widget *t = &w->widget[1]; // the title bar ... ugh
-			const Window *v;
-			int x;
-			int y;
-			int nx;
-			int ny;
-
-			// Stop the dragging if the left mouse button was released
-			if (!_left_button_down) {
-				w->flags4 &= ~WF_DRAGGING;
-				break;
-			}
-
-			SetWindowDirty(w);
-
-			x = _cursor.pos.x + _drag_delta.x;
-			y = _cursor.pos.y + _drag_delta.y;
-			nx = x;
-			ny = y;
-
-			if (_patches.window_snap_radius != 0) {
-				Window* const *vz;
-
-				int hsnap = _patches.window_snap_radius;
-				int vsnap = _patches.window_snap_radius;
-				int delta;
-
-				FOR_ALL_WINDOWS(vz) {
-					const Window *v = *vz;
-
-					if (v == w) continue; // Don't snap at yourself
-
-					if (y + w->height > v->top && y < v->top + v->height) {
-						// Your left border <-> other right border
-						delta = abs(v->left + v->width - x);
-						if (delta <= hsnap) {
-							nx = v->left + v->width;
-							hsnap = delta;
-						}
-
-						// Your right border <-> other left border
-						delta = abs(v->left - x - w->width);
-						if (delta <= hsnap) {
-							nx = v->left - w->width;
-							hsnap = delta;
-						}
-					}
-
-					if (w->top + w->height >= v->top && w->top <= v->top + v->height) {
-						// Your left border <-> other left border
-						delta = abs(v->left - x);
-						if (delta <= hsnap) {
-							nx = v->left;
-							hsnap = delta;
-						}
-
-						// Your right border <-> other right border
-						delta = abs(v->left + v->width - x - w->width);
-						if (delta <= hsnap) {
-							nx = v->left + v->width - w->width;
-							hsnap = delta;
-						}
-					}
-
-					if (x + w->width > v->left && x < v->left + v->width) {
-						// Your top border <-> other bottom border
-						delta = abs(v->top + v->height - y);
-						if (delta <= vsnap) {
-							ny = v->top + v->height;
-							vsnap = delta;
-						}
-
-						// Your bottom border <-> other top border
-						delta = abs(v->top - y - w->height);
-						if (delta <= vsnap) {
-							ny = v->top - w->height;
-							vsnap = delta;
-						}
-					}
-
-					if (w->left + w->width >= v->left && w->left <= v->left + v->width) {
-						// Your top border <-> other top border
-						delta = abs(v->top - y);
-						if (delta <= vsnap) {
-							ny = v->top;
-							vsnap = delta;
-						}
-
-						// Your bottom border <-> other bottom border
-						delta = abs(v->top + v->height - y - w->height);
-						if (delta <= vsnap) {
-							ny = v->top + v->height - w->height;
-							vsnap = delta;
-						}
-					}
-				}
-			}
-
-			// Make sure the window doesn't leave the screen
-			// 13 is the height of the title bar
-			nx = clamp(nx, 13 - t->right, _screen.width - 13 - t->left);
-			ny = clamp(ny, 0, _screen.height - 13);
-
-			// Make sure the title bar isn't hidden by behind the main tool bar
-			v = FindWindowById(WC_MAIN_TOOLBAR, 0);
-			if (v != NULL) {
-				int v_bottom = v->top + v->height;
-				int v_right = v->left + v->width;
-				if (ny + t->top >= v->top && ny + t->top < v_bottom) {
-					if ((v->left < 13 && nx + t->left < v->left) ||
-							(v_right > _screen.width - 13 && nx + t->right > v_right)) {
-						ny = v_bottom;
-					} else {
-						if (nx + t->left > v->left - 13 &&
-								nx + t->right < v_right + 13) {
-							if (w->top >= v_bottom) {
-								ny = v_bottom;
-							} else if (w->left < nx) {
-								nx = v->left - 13 - t->left;
-							} else {
-								nx = v_right + 13 - t->right;
-							}
-						}
-					}
-				}
-			}
-
-			if (w->viewport != NULL) {
-				w->viewport->left += nx - w->left;
-				w->viewport->top  += ny - w->top;
-			}
-			w->left = nx;
-			w->top  = ny;
-
-			SetWindowDirty(w);
-			return false;
-		} else if (w->flags4 & WF_SIZING) {
-			WindowEvent e;
-			int x, y;
-
-			/* Stop the sizing if the left mouse button was released */
-			if (!_left_button_down) {
-				w->flags4 &= ~WF_SIZING;
-				SetWindowDirty(w);
-				break;
-			}
-
-			x = _cursor.pos.x - _drag_delta.x;
-			y = _cursor.pos.y - _drag_delta.y;
-
-			/* X and Y has to go by step.. calculate it.
-			 * The cast to int is necessary else x/y are implicitly casted to
-			 * unsigned int, which won't work. */
-			if (w->resize.step_width > 1) x -= x % (int)w->resize.step_width;
-
-			if (w->resize.step_height > 1) y -= y % (int)w->resize.step_height;
-
-			/* Check if we don't go below the minimum set size */
-			if ((int)w->width + x < (int)w->resize.width)
-				x = w->resize.width - w->width;
-			if ((int)w->height + y < (int)w->resize.height)
-				y = w->resize.height - w->height;
-
-			/* Window already on size */
-			if (x == 0 && y == 0) return false;
-
-			/* Now find the new cursor pos.. this is NOT _cursor, because
-			    we move in steps. */
-			_drag_delta.x += x;
-			_drag_delta.y += y;
-
-			/* ResizeWindow sets both pre- and after-size to dirty for redrawal */
-			ResizeWindow(w, x, y);
-
-			e.event = WE_RESIZE;
-			e.we.sizing.size.x = x + w->width;
-			e.we.sizing.size.y = y + w->height;
-			e.we.sizing.diff.x = x;
-			e.we.sizing.diff.y = y;
-			w->wndproc(w, &e);
-			return false;
-		}
-	}
-
-	_dragging_window = false;
-	return false;
-}
-
-static void StartWindowDrag(Window *w)
-{
-	w->flags4 |= WF_DRAGGING;
-	_dragging_window = true;
-
-	_drag_delta.x = w->left - _cursor.pos.x;
-	_drag_delta.y = w->top  - _cursor.pos.y;
-
-	BringWindowToFront(w);
-	DeleteWindowById(WC_DROPDOWN_MENU, 0);
-}
-
-static void StartWindowSizing(Window *w)
-{
-	w->flags4 |= WF_SIZING;
-	_dragging_window = true;
-
-	_drag_delta.x = _cursor.pos.x;
-	_drag_delta.y = _cursor.pos.y;
-
-	BringWindowToFront(w);
-	DeleteWindowById(WC_DROPDOWN_MENU, 0);
-}
-
-
-static bool HandleScrollbarScrolling(void)
-{
-	Window* const *wz;
-	int i;
-	int pos;
-	Scrollbar *sb;
-
-	// Get out quickly if no item is being scrolled
-	if (!_scrolling_scrollbar) return true;
-
-	// Find the scrolling window
-	FOR_ALL_WINDOWS(wz) {
-		Window *w = *wz;
-
-		if (w->flags4 & WF_SCROLL_MIDDLE) {
-			// Abort if no button is clicked any more.
-			if (!_left_button_down) {
-				w->flags4 &= ~WF_SCROLL_MIDDLE;
-				SetWindowDirty(w);
-				break;
-			}
-
-			if (w->flags4 & WF_HSCROLL) {
-				sb = &w->hscroll;
-				i = _cursor.pos.x - _cursorpos_drag_start.x;
-			} else if (w->flags4 & WF_SCROLL2){
-				sb = &w->vscroll2;
-				i = _cursor.pos.y - _cursorpos_drag_start.y;
-			} else {
-				sb = &w->vscroll;
-				i = _cursor.pos.y - _cursorpos_drag_start.y;
-			}
-
-			// Find the item we want to move to and make sure it's inside bounds.
-			pos = min(max(0, i + _scrollbar_start_pos) * sb->count / _scrollbar_size, max(0, sb->count - sb->cap));
-			if (pos != sb->pos) {
-				sb->pos = pos;
-				SetWindowDirty(w);
-			}
-			return false;
-		}
-	}
-
-	_scrolling_scrollbar = false;
-	return false;
-}
-
-static bool HandleViewportScroll(void)
-{
-	WindowEvent e;
-	Window *w;
-
-	if (!_scrolling_viewport) return true;
-
-	w = FindWindowFromPt(_cursor.pos.x, _cursor.pos.y);
-
-	if (!_right_button_down || w == NULL) {
-		_cursor.fix_at = false;
-		_scrolling_viewport = false;
-		return true;
-	}
-
-	if (_patches.reverse_scroll) {
-		e.we.scroll.delta.x = -_cursor.delta.x;
-		e.we.scroll.delta.y = -_cursor.delta.y;
-	} else {
-		e.we.scroll.delta.x = _cursor.delta.x;
-		e.we.scroll.delta.y = _cursor.delta.y;
-	}
-
-	/* Create a scroll-event and send it to the window */
-	e.event = WE_SCROLL;
-	w->wndproc(w, &e);
-
-	_cursor.delta.x = 0;
-	_cursor.delta.y = 0;
-	return false;
-}
-
-/** Check if a window can be made top-most window, and if so do
- * it. If a window does not obscure any other windows, it will not
- * be brought to the foreground. Also if the only obscuring windows
- * are so-called system-windows, the window will not be moved.
- * The function will return false when a child window of this window is a
- * modal-popup; function returns a false and child window gets a white border
- * @param w Window to bring on-top
- * @return false if the window has an active modal child, true otherwise */
-static bool MaybeBringWindowToFront(const Window *w)
-{
-	bool bring_to_front = false;
-	Window* const *wz;
-	Window* const *uz;
-
-	if (w->window_class == WC_MAIN_WINDOW ||
-			IsVitalWindow(w) ||
-			w->window_class == WC_TOOLTIPS ||
-			w->window_class == WC_DROPDOWN_MENU) {
-		return true;
-	}
-
-	wz = FindWindowZPosition(w);
-	for (uz = wz; ++uz != _last_z_window;) {
-		Window *u = *uz;
-
-		/* A modal child will prevent the activation of the parent window */
-		if (u->parent == w && (u->desc_flags & WDF_MODAL)) {
-			u->flags4 |= WF_WHITE_BORDER_MASK;
-			SetWindowDirty(u);
-			return false;
-		}
-
-		if (u->window_class == WC_MAIN_WINDOW ||
-				IsVitalWindow(u) ||
-				u->window_class == WC_TOOLTIPS ||
-				u->window_class == WC_DROPDOWN_MENU) {
-			continue;
-		}
-
-		/* Window sizes don't interfere, leave z-order alone */
-		if (w->left + w->width <= u->left ||
-				u->left + u->width <= w->left ||
-				w->top  + w->height <= u->top ||
-				u->top + u->height <= w->top) {
-			continue;
-		}
-
-		bring_to_front = true;
-	}
-
-	if (bring_to_front) BringWindowToFront(w);
-	return true;
-}
-
-/** Send a message from one window to another. The receiving window is found by
- * @param w @see Window pointer pointing to the other window
- * @param msg Specifies the message to be sent
- * @param wparam Specifies additional message-specific information
- * @param lparam Specifies additional message-specific information
- */
-static void SendWindowMessageW(Window *w, uint msg, uint wparam, uint lparam)
-{
-	WindowEvent e;
-
-	e.event             = WE_MESSAGE;
-	e.we.message.msg    = msg;
-	e.we.message.wparam = wparam;
-	e.we.message.lparam = lparam;
-
-	w->wndproc(w, &e);
-}
-
-/** Send a message from one window to another. The receiving window is found by
- * @param wnd_class @see WindowClass class AND
- * @param wnd_num @see WindowNumber number, mostly 0
- * @param msg Specifies the message to be sent
- * @param wparam Specifies additional message-specific information
- * @param lparam Specifies additional message-specific information
- */
-void SendWindowMessage(WindowClass wnd_class, WindowNumber wnd_num, uint msg, uint wparam, uint lparam)
-{
-	Window *w = FindWindowById(wnd_class, wnd_num);
-	if (w != NULL) SendWindowMessageW(w, msg, wparam, lparam);
-}
-
-/** Send a message from one window to another. The message will be sent
- * to ALL windows of the windowclass specified in the first parameter
- * @param wnd_class @see WindowClass class
- * @param msg Specifies the message to be sent
- * @param wparam Specifies additional message-specific information
- * @param lparam Specifies additional message-specific information
- */
-void SendWindowMessageClass(WindowClass wnd_class, uint msg, uint wparam, uint lparam)
-{
-	Window* const *wz;
-
-	FOR_ALL_WINDOWS(wz) {
-		if ((*wz)->window_class == wnd_class) SendWindowMessageW(*wz, msg, wparam, lparam);
-	}
-}
-
-/** Handle keyboard input.
- * @param key Lower 8 bits contain the ASCII character, the higher
- * 16 bits the keycode */
-void HandleKeypress(uint32 key)
-{
-	Window* const *wz;
-	WindowEvent e;
-	/* Stores if a window with a textfield for typing is open
-	 * If this is the case, keypress events are only passed to windows with text fields and
-	 * to thein this main toolbar. */
-	bool query_open = false;
-
-	/*
-	* During the generation of the world, there might be
-	* another thread that is currently building for example
-	* a road. To not interfere with those tasks, we should
-	* NOT change the _current_player here.
-	*
-	* This is not necessary either, as the only events that
-	* can be handled are the 'close application' events
-	*/
-	if (!IsGeneratingWorld()) _current_player = _local_player;
-
-	// Setup event
-	e.event = WE_KEYPRESS;
-	e.we.keypress.key     = GB(key,  0, 16);
-	e.we.keypress.keycode = GB(key, 16, 16);
-	e.we.keypress.cont = true;
-
-	// check if we have a query string window open before allowing hotkeys
-	if (FindWindowById(WC_QUERY_STRING,       0) != NULL ||
-			FindWindowById(WC_SEND_NETWORK_MSG,   0) != NULL ||
-			FindWindowById(WC_GENERATE_LANDSCAPE, 0) != NULL ||
-			FindWindowById(WC_CONSOLE,            0) != NULL ||
-			FindWindowById(WC_SAVELOAD,           0) != NULL) {
-		query_open = true;
-	}
-
-	// Call the event, start with the uppermost window.
-	for (wz = _last_z_window; wz != _z_windows;) {
-		Window *w = *--wz;
-
-		// if a query window is open, only call the event for certain window types
-		if (query_open &&
-				w->window_class != WC_QUERY_STRING &&
-				w->window_class != WC_SEND_NETWORK_MSG &&
-				w->window_class != WC_GENERATE_LANDSCAPE &&
-				w->window_class != WC_CONSOLE &&
-				w->window_class != WC_SAVELOAD) {
-			continue;
-		}
-		w->wndproc(w, &e);
-		if (!e.we.keypress.cont) break;
-	}
-
-	if (e.we.keypress.cont) {
-		Window *w = FindWindowById(WC_MAIN_TOOLBAR, 0);
-		// When there is no toolbar w is null, check for that
-		if (w != NULL) w->wndproc(w, &e);
-	}
-}
-
-extern void UpdateTileSelection(void);
-extern bool VpHandlePlaceSizingDrag(void);
-
-static int _input_events_this_tick = 0;
-
-static void HandleAutoscroll(void)
-{
-	Window *w;
-	ViewPort *vp;
-	int x = _cursor.pos.x;
-	int y = _cursor.pos.y;
-
-	if (_input_events_this_tick != 0) {
-		/* HandleAutoscroll is called only once per GameLoop() - so we can clear the counter here */
-		_input_events_this_tick = 0;
-		/* there were some inputs this tick, don't scroll ??? */
-		return;
-	}
-
-	if (_patches.autoscroll && _game_mode != GM_MENU && !IsGeneratingWorld()) {
-		w = FindWindowFromPt(x, y);
-		if (w == NULL || w->flags4 & WF_DISABLE_VP_SCROLL) return;
-		vp = IsPtInWindowViewport(w, x, y);
-		if (vp != NULL) {
-			x -= vp->left;
-			y -= vp->top;
-			//here allows scrolling in both x and y axis
-#define scrollspeed 3
-			if (x - 15 < 0) {
-				WP(w, vp_d).scrollpos_x += (x - 15) * scrollspeed << vp->zoom;
-			} else if (15 - (vp->width - x) > 0) {
-				WP(w, vp_d).scrollpos_x += (15 - (vp->width - x)) * scrollspeed << vp->zoom;
-			}
-			if (y - 15 < 0) {
-				WP(w, vp_d).scrollpos_y += (y - 15) * scrollspeed << vp->zoom;
-			} else if (15 - (vp->height - y) > 0) {
-				WP(w,vp_d).scrollpos_y += (15 - (vp->height - y)) * scrollspeed << vp->zoom;
-			}
-#undef scrollspeed
-		}
-	}
-}
-
-void MouseLoop(int click, int mousewheel)
-{
-	int x,y;
-	Window *w;
-	ViewPort *vp;
-
-	DecreaseWindowCounters();
-	HandlePlacePresize();
-	UpdateTileSelection();
-	if (!VpHandlePlaceSizingDrag())  return;
-	if (!HandleDragDrop())           return;
-	if (!HandlePopupMenu())          return;
-	if (!HandleWindowDragging())     return;
-	if (!HandleScrollbarScrolling()) return;
-	if (!HandleViewportScroll())     return;
-	if (!HandleMouseOver())          return;
-
-	x = _cursor.pos.x;
-	y = _cursor.pos.y;
-
-	if (click == 0 && mousewheel == 0) return;
-
-	w = FindWindowFromPt(x, y);
-	if (w == NULL) return;
-	if (!MaybeBringWindowToFront(w)) return;
-	vp = IsPtInWindowViewport(w, x, y);
-
-	/* Don't allow any action in a viewport if either in menu of in generating world */
-	if (vp != NULL && (_game_mode == GM_MENU || IsGeneratingWorld())) return;
-
-	if (mousewheel != 0) {
-		WindowEvent e;
-
-		/* Send WE_MOUSEWHEEL event to window */
-		e.event = WE_MOUSEWHEEL;
-		e.we.wheel.wheel = mousewheel;
-		w->wndproc(w, &e);
-
-		/* Dispatch a MouseWheelEvent for widgets if it is not a viewport */
-		if (vp == NULL) DispatchMouseWheelEvent(w, GetWidgetFromPos(w, x - w->left, y - w->top), mousewheel);
-	}
-
-	if (vp != NULL) {
-		switch (click) {
-			case 1:
-				DEBUG(misc, 2, "Cursor: 0x%X (%d)", _cursor.sprite, _cursor.sprite);
-				if (_thd.place_mode != 0 &&
-						// query button and place sign button work in pause mode
-						_cursor.sprite != SPR_CURSOR_QUERY &&
-						_cursor.sprite != SPR_CURSOR_SIGN &&
-						_pause != 0 &&
-						!_cheats.build_in_pause.value) {
-					return;
-				}
-
-				if (_thd.place_mode == 0) {
-					HandleViewportClicked(vp, x, y);
-				} else {
-					PlaceObject();
-				}
-				break;
-
-			case 2:
-				if (!(w->flags4 & WF_DISABLE_VP_SCROLL)) {
-					_scrolling_viewport = true;
-					_cursor.fix_at = true;
-				}
-				break;
-		}
-	} else {
-		switch (click) {
-			case 1: DispatchLeftClickEvent(w, x - w->left, y - w->top);  break;
-			case 2: DispatchRightClickEvent(w, x - w->left, y - w->top); break;
-		}
-	}
-}
-
-void HandleMouseEvents(void)
-{
-	int click;
-	int mousewheel;
-
-	/*
-	 * During the generation of the world, there might be
-	 * another thread that is currently building for example
-	 * a road. To not interfere with those tasks, we should
-	 * NOT change the _current_player here.
-	 *
-	 * This is not necessary either, as the only events that
-	 * can be handled are the 'close application' events
-	 */
-	if (!IsGeneratingWorld()) _current_player = _local_player;
-
-	// Mouse event?
-	click = 0;
-	if (_left_button_down && !_left_button_clicked) {
-		_left_button_clicked = true;
-		click = 1;
-		_input_events_this_tick++;
-	} else if (_right_button_clicked) {
-		_right_button_clicked = false;
-		click = 2;
-		_input_events_this_tick++;
-	}
-
-	mousewheel = 0;
-	if (_cursor.wheel) {
-		mousewheel = _cursor.wheel;
-		_cursor.wheel = 0;
-		_input_events_this_tick++;
-	}
-
-	MouseLoop(click, mousewheel);
-}
-
-void InputLoop(void)
-{
-	HandleMouseEvents();
-	HandleAutoscroll();
-}
-
-void UpdateWindows(void)
-{
-	Window* const *wz;
-	static int we4_timer = 0;
-	int t = we4_timer + 1;
-
-	if (t >= 100) {
-		for (wz = _last_z_window; wz != _z_windows;) {
-			CallWindowEventNP(*--wz, WE_4);
-		}
-		t = 0;
-	}
-	we4_timer = t;
-
-	for (wz = _last_z_window; wz != _z_windows;) {
-		Window *w = *--wz;
-		if (w->flags4 & WF_WHITE_BORDER_MASK) {
-			w->flags4 -= WF_WHITE_BORDER_ONE;
-
-			if (!(w->flags4 & WF_WHITE_BORDER_MASK)) SetWindowDirty(w);
-		}
-	}
-
-	DrawDirtyBlocks();
-
-	FOR_ALL_WINDOWS(wz) {
-		if ((*wz)->viewport != NULL) UpdateViewportPosition(*wz);
-	}
-	DrawTextMessage();
-	// Redraw mouse cursor in case it was hidden
-	DrawMouseCursor();
-}
-
-
-int GetMenuItemIndex(const Window *w, int x, int y)
-{
-	if ((x -= w->left) >= 0 && x < w->width && (y -= w->top + 1) >= 0) {
-		y /= 10;
-
-		if (y < WP(w, const menu_d).item_count &&
-				!HASBIT(WP(w, const menu_d).disabled_items, y)) {
-			return y;
-		}
-	}
-	return -1;
-}
-
-void InvalidateWindow(WindowClass cls, WindowNumber number)
-{
-	Window* const *wz;
-
-	FOR_ALL_WINDOWS(wz) {
-		const Window *w = *wz;
-		if (w->window_class == cls && w->window_number == number) SetWindowDirty(w);
-	}
-}
-
-void InvalidateWidget(const Window *w, byte widget_index)
-{
-	const Widget *wi = &w->widget[widget_index];
-
-	/* Don't redraw the window if the widget is invisible or of no-type */
-	if (wi->type == WWT_EMPTY || IsWindowWidgetHidden(w, widget_index)) return;
-
-	SetDirtyBlocks(w->left + wi->left, w->top + wi->top, w->left + wi->right + 1, w->top + wi->bottom + 1);
-}
-
-void InvalidateWindowWidget(WindowClass cls, WindowNumber number, byte widget_index)
-{
-	Window* const *wz;
-
-	FOR_ALL_WINDOWS(wz) {
-		const Window *w = *wz;
-		if (w->window_class == cls && w->window_number == number) {
-			InvalidateWidget(w, widget_index);
-		}
-	}
-}
-
-void InvalidateWindowClasses(WindowClass cls)
-{
-	Window* const *wz;
-
-	FOR_ALL_WINDOWS(wz) {
-		if ((*wz)->window_class == cls) SetWindowDirty(*wz);
-	}
-}
-
-void InvalidateThisWindowData(Window *w)
-{
-	CallWindowEventNP(w, WE_INVALIDATE_DATA);
-	SetWindowDirty(w);
-}
-
-void InvalidateWindowData(WindowClass cls, WindowNumber number)
-{
-	Window* const *wz;
-
-	FOR_ALL_WINDOWS(wz) {
-		Window *w = *wz;
-		if (w->window_class == cls && w->window_number == number) InvalidateThisWindowData(w);
-	}
-}
-
-void InvalidateWindowClassesData(WindowClass cls)
-{
-	Window* const *wz;
-
-	FOR_ALL_WINDOWS(wz) {
-		if ((*wz)->window_class == cls) InvalidateThisWindowData(*wz);
-	}
-}
-
-void CallWindowTickEvent(void)
-{
-	Window* const *wz;
-
-	for (wz = _last_z_window; wz != _z_windows;) {
-		CallWindowEventNP(*--wz, WE_TICK);
-	}
-}
-
-void DeleteNonVitalWindows(void)
-{
-	Window* const *wz;
-
-restart_search:
-	/* When we find the window to delete, we need to restart the search
-	 * as deleting this window could cascade in deleting (many) others
-	 * anywhere in the z-array */
-	FOR_ALL_WINDOWS(wz) {
-		Window *w = *wz;
-		if (w->window_class != WC_MAIN_WINDOW &&
-				w->window_class != WC_SELECT_GAME &&
-				w->window_class != WC_MAIN_TOOLBAR &&
-				w->window_class != WC_STATUS_BAR &&
-				w->window_class != WC_TOOLBAR_MENU &&
-				w->window_class != WC_TOOLTIPS &&
-				(w->flags4 & WF_STICKY) == 0) { // do not delete windows which are 'pinned'
-
-			DeleteWindow(w);
-			goto restart_search;
-		}
-	}
-}
-
-/* It is possible that a stickied window gets to a position where the
- * 'close' button is outside the gaming area. You cannot close it then; except
- * with this function. It closes all windows calling the standard function,
- * then, does a little hacked loop of closing all stickied windows. Note
- * that standard windows (status bar, etc.) are not stickied, so these aren't affected */
-void DeleteAllNonVitalWindows(void)
-{
-	Window* const *wz;
-
-	/* Delete every window except for stickied ones, then sticky ones as well */
-	DeleteNonVitalWindows();
-
-restart_search:
-	/* When we find the window to delete, we need to restart the search
-	 * as deleting this window could cascade in deleting (many) others
-	 * anywhere in the z-array */
-	FOR_ALL_WINDOWS(wz) {
-		if ((*wz)->flags4 & WF_STICKY) {
-			DeleteWindow(*wz);
-			goto restart_search;
-		}
-	}
-}
-
-/* Delete all always on-top windows to get an empty screen */
-void HideVitalWindows(void)
-{
-	DeleteWindowById(WC_MAIN_TOOLBAR, 0);
-	DeleteWindowById(WC_STATUS_BAR, 0);
-}
-
-int PositionMainToolbar(Window *w)
-{
-	DEBUG(misc, 5, "Repositioning Main Toolbar...");
-
-	if (w == NULL || w->window_class != WC_MAIN_TOOLBAR) {
-		w = FindWindowById(WC_MAIN_TOOLBAR, 0);
-	}
-
-	switch (_patches.toolbar_pos) {
-		case 1:  w->left = (_screen.width - w->width) / 2; break;
-		case 2:  w->left = _screen.width - w->width; break;
-		default: w->left = 0;
-	}
-	SetDirtyBlocks(0, 0, _screen.width, w->height); // invalidate the whole top part
-	return w->left;
-}
-
-void RelocateAllWindows(int neww, int newh)
-{
-	Window* const *wz;
-
-	FOR_ALL_WINDOWS(wz) {
-		Window *w = *wz;
-		int left, top;
-
-		if (w->window_class == WC_MAIN_WINDOW) {
-			ViewPort *vp = w->viewport;
-			vp->width = w->width = neww;
-			vp->height = w->height = newh;
-			vp->virtual_width = neww << vp->zoom;
-			vp->virtual_height = newh << vp->zoom;
-			continue; // don't modify top,left
-		}
-
-		/* XXX - this probably needs something more sane. For example specying
-		 * in a 'backup'-desc that the window should always be centred. */
-		switch (w->window_class) {
-			case WC_MAIN_TOOLBAR:
-				top = w->top;
-				left = PositionMainToolbar(w); // changes toolbar orientation
-				break;
-
-			case WC_SELECT_GAME:
-			case WC_GAME_OPTIONS:
-			case WC_NETWORK_WINDOW:
-				top = (newh - w->height) >> 1;
-				left = (neww - w->width) >> 1;
-				break;
-
-			case WC_NEWS_WINDOW:
-				top = newh - w->height;
-				left = (neww - w->width) >> 1;
-				break;
-
-			case WC_STATUS_BAR:
-				top = newh - w->height;
-				left = (neww - w->width) >> 1;
-				break;
-
-			case WC_SEND_NETWORK_MSG:
-				top = (newh - 26); // 26 = height of status bar + height of chat bar
-				left = (neww - w->width) >> 1;
-				break;
-
-			case WC_CONSOLE:
-				IConsoleResize(w);
-				continue;
-
-			default:
-				left = w->left;
-				if (left + (w->width >> 1) >= neww) left = neww - w->width;
-				top = w->top;
-				if (top + (w->height >> 1) >= newh) top = newh - w->height;
-				break;
-		}
-
-		if (w->viewport != NULL) {
-			w->viewport->left += left - w->left;
-			w->viewport->top += top - w->top;
-		}
-
-		w->left = left;
-		w->top = top;
-	}
-}