path: root/gui/newgui.cpp

/* ScummVM - Scumm Interpreter
 * Copyright (C) 2002-2004 The ScummVM project
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * $Header$
 */

#include "stdafx.h"
#include "common/util.h"
#include "newgui.h"
#include "dialog.h"

#ifdef NEW_FONT_CODE
#include "gui/font.h"
#endif


namespace GUI {

/*
 * TODO list
 * - add more widgets: edit field, popup, radio buttons, ...
 *
 * Other ideas:
 * - allow multi line (l/c/r aligned) text via StaticTextWidget ?
 * - add "close" widget to all dialogs (with a flag to turn it off) ?
 * - make dialogs "moveable" ?
 * - come up with a new look & feel / theme for the GUI 
 * - ...
 */

enum {
	kDoubleClickDelay = 500, // milliseconds
	kCursorAnimateDelay = 250,
	kKeyRepeatInitialDelay = 400,
	kKeyRepeatSustainDelay = 100
};

#ifdef NEW_FONT_CODE
/*
 * TODO: 
 *  - replace kLineHeight by global variable or query method
 *  - ....
 */
#else
#ifdef __PALM_OS__
static const byte *guifont;
#else
// Built-in font
static const byte guifont[] = {
0,0,99,1,226,8,4,8,6,8,6,0,0,0,0,0,0,0,0,0,0,0,8,2,1,8,0,0,0,0,0,0,0,0,0,0,0,0,4,3,7,8,7,7,8,4,5,5,8,7,4,7,3,8,7,7,7,7,8,7,7,7,7,7,3,4,7,5,7,7,8,7,7,7,7,7,7,7,7,5,7,7,
7,8,7,7,7,7,7,7,7,7,7,8,7,7,7,5,8,5,8,8,7,7,7,6,7,7,7,7,7,5,6,7,5,8,7,7,7,7,7,7,7,7,7,8,7,7,7,5,3,5,7,8,7,7,7,7,7,7,0,6,7,7,7,5,5,5,7,0,6,8,8,7,7,7,7,7,0,7,7,0,0,
0,0,0,7,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,7,0,0,0,0,0,0,0,0,1,3,6,12,
24,62,3,0,128,192,96,48,24,124,192,0,0,3,62,24,12,6,3,1,0,192,124,24,48,96,192,128,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,237,74,72,0,0,0,0,0,128,128,128,0,0,0,0,0,0,0,0,0,0,0,0,0,60,66,153,161,161,153,66,60,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,96,96,96,96,0,0,96,0,102,102,102,0,0,0,0,0,102,102,255,102,255,102,102,0,24,62,96,60,6,124,24,0,98,102,12,24,48,102,70,0,60,102,60,56,103,102,63,0,96,48,16,0,0,0,0,0,24,48,96,96,96,48,24,0,96,48,24,24,24,48,96,0,
0,102,60,255,60,102,0,0,0,24,24,126,24,24,0,0,0,0,0,0,0,48,48,96,0,0,0,126,0,0,0,0,0,0,0,0,0,96,96,0,0,3,6,12,24,48,96,0,60,102,102,102,102,102,60,0,24,24,56,24,24,24,126,0,60,102,6,12,48,96,126,0,60,102,6,28,6,102,60,0,6,
14,30,102,127,6,6,0,126,96,124,6,6,102,60,0,60,102,96,124,102,102,60,0,126,102,12,24,24,24,24,0,60,102,102,60,102,102,60,0,60,102,102,62,6,102,60,0,0,0,96,0,0,96,0,0,0,0,48,0,0,48,48,96,14,24,48,96,48,24,14,0,0,0,120,0,120,0,0,0,112,24,
12,6,12,24,112,0,60,102,6,12,24,0,24,0,0,0,0,255,255,0,0,0,24,60,102,126,102,102,102,0,124,102,102,124,102,102,124,0,60,102,96,96,96,102,60,0,120,108,102,102,102,108,120,0,126,96,96,120,96,96,126,0,126,96,96,120,96,96,96,0,60,102,96,110,102,102,60,0,102,102,102,
126,102,102,102,0,120,48,48,48,48,48,120,0,30,12,12,12,12,108,56,0,102,108,120,112,120,108,102,0,96,96,96,96,96,96,126,0,99,119,127,107,99,99,99,0,102,118,126,126,110,102,102,0,60,102,102,102,102,102,60,0,124,102,102,124,96,96,96,0,60,102,102,102,102,60,14,0,124,102,102,124,
120,108,102,0,60,102,96,60,6,102,60,0,126,24,24,24,24,24,24,0,102,102,102,102,102,102,60,0,102,102,102,102,102,60,24,0,99,99,99,107,127,119,99,0,102,102,60,24,60,102,102,0,102,102,102,60,24,24,24,0,126,6,12,24,48,96,126,0,120,96,96,96,96,96,120,0,3,6,12,24,48,
96,192,0,120,24,24,24,24,24,120,0,0,0,0,0,0,219,219,0,0,0,0,0,0,0,0,255,102,102,102,0,0,0,0,0,0,0,60,6,62,102,62,0,0,96,96,124,102,102,124,0,0,0,60,96,96,96,60,0,0,6,6,62,102,102,62,0,0,0,60,102,126,96,60,0,0,14,24,62,24,24,
24,0,0,0,62,102,102,62,6,124,0,96,96,124,102,102,102,0,0,48,0,112,48,48,120,0,0,12,0,12,12,12,12,120,0,96,96,108,120,108,102,0,0,112,48,48,48,48,120,0,0,0,102,127,127,107,99,0,0,0,124,102,102,102,102,0,0,0,60,102,102,102,60,0,0,0,124,102,102,124,96,
96,0,0,62,102,102,62,6,6,0,0,124,102,96,96,96,0,0,0,62,96,60,6,124,0,0,24,126,24,24,24,14,0,0,0,102,102,102,102,62,0,0,0,102,102,102,60,24,0,0,0,99,107,127,62,54,0,0,0,102,60,24,60,102,0,0,0,102,102,102,62,12,120,0,0,126,12,24,48,126,0,
24,48,48,96,48,48,24,0,96,96,96,0,96,96,96,0,96,48,48,24,48,48,96,0,0,0,97,153,134,0,0,0,8,12,14,255,255,14,12,8,60,102,96,96,102,60,24,56,102,0,102,102,102,102,62,0,12,24,60,102,126,96,60,0,24,36,60,6,62,102,62,0,102,0,60,6,62,102,62,0,48,
24,60,6,62,102,62,0,0,0,0,0,0,0,0,0,0,60,96,96,96,60,24,56,24,36,60,102,126,96,60,0,102,0,60,102,126,96,60,0,48,24,60,102,126,96,60,0,0,216,0,112,48,48,120,0,48,72,0,112,48,48,120,0,96,48,0,112,48,48,120,0,102,24,60,102,126,102,102,0,0,0,
0,0,0,0,0,0,24,48,124,96,120,96,124,0,0,0,108,26,126,216,110,0,30,40,40,126,72,136,142,0,24,36,60,102,102,102,60,0,102,0,60,102,102,102,60,0,48,24,60,102,102,102,60,0,24,36,0,102,102,102,62,0,48,24,102,102,102,102,62,0,0,0,0,0,0,0,0,0,102,60,102,
102,102,102,60,0,102,0,102,102,102,102,60,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,12,24,60,6,62,102,62,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,28,54,54,124,102,102,124,64,0,0,0
};
#endif

#endif // NEW_FONT_CODE


// Constructor
NewGui::NewGui() : _screen(0), _needRedraw(false),
	_stateIsSaved(false), _cursorAnimateCounter(0), _cursorAnimateTimer(0) {
	
	_system = OSystem::instance();

	// Clear the cursor
	memset(_cursor, 0xFF, sizeof(_cursor));

	// Reset key repeat
	_currentKeyDown.keycode = 0;
}

void NewGui::updateColors() {
	// Setup some default GUI colors.
	_bgcolor = _system->RGBToColor(0, 0, 0);
	_color = _system->RGBToColor(104, 104, 104);
	_shadowcolor = _system->RGBToColor(64, 64, 64);
	_textcolor = _system->RGBToColor(32, 160, 32);
	_textcolorhi = _system->RGBToColor(0, 255, 0);
}

void NewGui::runLoop() {
	Dialog *activeDialog = _dialogStack.top();
	bool didSaveState = false;

	if (activeDialog == 0)
		return;
	
	// Setup some default GUI colors. Normally this will be done whenever an
	// EVENT_SCREEN_CHANGED is received. However, not yet all backends support
	// that event, so we also do it "manually" whenever a run loop is entered.
	updateColors();

	if (!_stateIsSaved) {
		saveState();
		didSaveState = true;
	}

	while (!_dialogStack.empty() && activeDialog == _dialogStack.top()) {
		activeDialog->handleTickle();

		if (_needRedraw) {
			// Restore the overlay to its initial state, then draw all dialogs.
			// This is necessary to get the blending right.
			_system->clear_overlay();
			_system->grab_overlay(_screen, _screenPitch);
			for (int i = 0; i < _dialogStack.size(); i++)
				_dialogStack[i]->drawDialog();
			_needRedraw = false;
		}

		animateCursor();
		_system->update_screen();		

		OSystem::Event event;
		uint32 time = _system->get_msecs();

		while (_system->poll_event(&event)) {
			switch (event.event_code) {
			case OSystem::EVENT_KEYDOWN:
#if !defined(__PALM_OS__)
				// init continuous event stream
				// not done on PalmOS because keyboard is emulated and keyup is not generated
				_currentKeyDown.ascii = event.kbd.ascii;
				_currentKeyDown.keycode = event.kbd.keycode;
				_currentKeyDown.flags = event.kbd.flags;
				_keyRepeatTime = time + kKeyRepeatInitialDelay;
#endif
				activeDialog->handleKeyDown(event.kbd.ascii, event.kbd.keycode, event.kbd.flags);
				break;
			case OSystem::EVENT_KEYUP:
				activeDialog->handleKeyUp(event.kbd.ascii, event.kbd.keycode, event.kbd.flags);
				if (event.kbd.keycode == _currentKeyDown.keycode)
					// only stop firing events if it's the current key
					_currentKeyDown.keycode = 0;
				break;
			case OSystem::EVENT_MOUSEMOVE:
				activeDialog->handleMouseMoved(event.mouse.x - activeDialog->_x, event.mouse.y - activeDialog->_y, 0);
				break;
			// We don't distinguish between mousebuttons (for now at least)
			case OSystem::EVENT_LBUTTONDOWN:
			case OSystem::EVENT_RBUTTONDOWN: {
				if (_lastClick.count && (time < _lastClick.time + kDoubleClickDelay)
							&& ABS(_lastClick.x - event.mouse.x) < 3
							&& ABS(_lastClick.y - event.mouse.y) < 3) {
					_lastClick.count++;
				} else {
					_lastClick.x = event.mouse.x;
					_lastClick.y = event.mouse.y;
					_lastClick.count = 1;
				}
				_lastClick.time = time;
				}
				activeDialog->handleMouseDown(event.mouse.x - activeDialog->_x, event.mouse.y - activeDialog->_y, 1, _lastClick.count);
				break;
			case OSystem::EVENT_LBUTTONUP:
			case OSystem::EVENT_RBUTTONUP:
				activeDialog->handleMouseUp(event.mouse.x - activeDialog->_x, event.mouse.y - activeDialog->_y, 1, _lastClick.count);
				break;
			case OSystem::EVENT_WHEELUP:
				activeDialog->handleMouseWheel(event.mouse.x - activeDialog->_x, event.mouse.y - activeDialog->_y, -1);
				break;
			case OSystem::EVENT_WHEELDOWN:
				activeDialog->handleMouseWheel(event.mouse.x - activeDialog->_x, event.mouse.y - activeDialog->_y, 1);
				break;
			case OSystem::EVENT_QUIT:
				_system->quit();
				return;
			case OSystem::EVENT_SCREEN_CHANGED:
				updateColors();
				break;
			}
		}

		// check if event should be sent again (keydown)
		if (_currentKeyDown.keycode != 0) {
			if (_keyRepeatTime < time) {
				// fire event
				activeDialog->handleKeyDown(_currentKeyDown.ascii, _currentKeyDown.keycode, _currentKeyDown.flags);
				_keyRepeatTime = time + kKeyRepeatSustainDelay;
			}
		}

		// Delay for a moment
		_system->delay_msecs(10);
	}
	
	if (didSaveState)
		restoreState();
}

#pragma mark -

void NewGui::saveState() {

	// Backup old cursor
	_oldCursorMode = _system->show_mouse(true);

	// Enable the overlay
	_system->show_overlay();

	// Create a screen buffer for the overlay data, and fill it with
	// whatever is visible on the screen rught now.
	int sys_height = _system->get_overlay_height();
	int sys_width = _system->get_overlay_width();
	_screen = (NewGuiColor*)calloc(sys_width * sys_height, sizeof(NewGuiColor));
	_screenPitch = sys_width;
	_system->grab_overlay(_screen, _screenPitch);

	_currentKeyDown.keycode = 0;
	_lastClick.x = _lastClick.y = 0;
	_lastClick.time = 0;
	_lastClick.count = 0;

	_stateIsSaved = true;
}

void NewGui::restoreState() {
	_system->show_mouse(_oldCursorMode);

	_system->hide_overlay();
	if (_screen) {
		free(_screen);
		_screen = 0;
	}

	_system->update_screen();
	
	_stateIsSaved = false;
}

void NewGui::openDialog(Dialog *dialog) {
	_dialogStack.push(dialog);
	_needRedraw = true;
}

void NewGui::closeTopDialog() {
	// Don't do anything if no dialog is open
	if (_dialogStack.empty())
		return;

	// Remove the dialog from the stack
	_dialogStack.pop();
	_needRedraw = true;
}

#pragma mark -

NewGuiColor *NewGui::getBasePtr(int x, int y) {
	return _screen + x + y * _screenPitch;
}

void NewGui::box(int x, int y, int width, int height, NewGuiColor colorA, NewGuiColor colorB) {
	hLine(x + 1, y, x + width - 2, colorA);
	hLine(x, y + 1, x + width - 1, colorA);
	vLine(x, y + 1, y + height - 2, colorA);
	vLine(x + 1, y, y + height - 1, colorA);

	hLine(x + 1, y + height - 2, x + width - 1, colorB);
	hLine(x + 1, y + height - 1, x + width - 2, colorB);
	vLine(x + width - 1, y + 1, y + height - 2, colorB);
	vLine(x + width - 2, y + 1, y + height - 1, colorB);
}

void NewGui::line(int x, int y, int x2, int y2, NewGuiColor color) {
	NewGuiColor *ptr;

	if (x2 < x)
		SWAP(x2, x);

	if (y2 < y)
		SWAP(y2, y);

	ptr = getBasePtr(x, y);

	if (x == x2) {
		/* vertical line */
		while (y++ <= y2) {
			*ptr = color;
			ptr += _screenPitch;
		}
	} else if (y == y2) {
		/* horizontal line */
		while (x++ <= x2) {
			*ptr++ = color;
		}
	}
}

void NewGui::blendRect(int x, int y, int w, int h, NewGuiColor color, int level) {
#ifdef NEWGUI_256
	fillRect(x, y, w, h, color);
#else
	int r, g, b;
	uint8 ar, ag, ab;
	_system->colorToRGB(color, ar, ag, ab);
	r = ar * level;
	g = ag * level;
	b = ab * level;

	NewGuiColor *ptr = getBasePtr(x, y);

	while (h--) {
		for (int i = 0; i < w; i++) {
			_system->colorToRGB(ptr[i], ar, ag, ab);
			ptr[i] = _system->RGBToColor((ar + r) / (level+1),
										 (ag + g) / (level+1),
										 (ab + b) / (level+1));
		}
		ptr += _screenPitch;
	}
#endif
}

void NewGui::fillRect(int x, int y, int w, int h, NewGuiColor color) {
	int i;
	NewGuiColor *ptr = getBasePtr(x, y);

	while (h--) {
		for (i = 0; i < w; i++) {
			ptr[i] = color;
		}
		ptr += _screenPitch;
	}
}

void NewGui::checkerRect(int x, int y, int w, int h, NewGuiColor color) {
	int i;
	NewGuiColor *ptr = getBasePtr(x, y);

	while (h--) {
		for (i = 0; i < w; i++) {
			if ((h ^ i) & 1)
				ptr[i] = color;
		}
		ptr += _screenPitch;
	}
}

void NewGui::frameRect(int x, int y, int w, int h, NewGuiColor color) {
	int i;
	NewGuiColor *ptr, *basePtr = getBasePtr(x, y);
	if (basePtr == NULL)
		return;

	ptr = basePtr;
	for (i = 0; i < w; i++, ptr++)
		*ptr = color;
	ptr--;
	for (i = 0; i < h; i++, ptr += _screenPitch)
		*ptr = color;
	ptr = basePtr;
	for (i = 0; i < h; i++, ptr += _screenPitch)
		*ptr = color;
	ptr -= _screenPitch;
	for (i = 0; i < w; i++, ptr++)
		*ptr = color;
}

void NewGui::addDirtyRect(int x, int y, int w, int h) {
	// For now we don't keep yet another list of dirty rects but simply
	// blit the affected area directly to the overlay. At least for our current
	// GUI/widget/dialog code that is just fine.
	NewGuiColor *buf = getBasePtr(x, y);
	_system->copy_rect_overlay(buf, _screenPitch, x, y, w, h);
}

void NewGui::drawChar(byte chr, int xx, int yy, NewGuiColor color) {
	NewGuiColor *ptr = getBasePtr(xx, yy);
	uint x, y;

#ifdef NEW_FONT_CODE
	assert(g_sysfont.bits != 0 && g_sysfont.maxwidth <= 16);

	// If this character is not included in the font, use the default char.
	if (chr < g_sysfont.firstchar || chr >= g_sysfont.firstchar + g_sysfont.size) {
		if (chr == ' ')
			return;
		chr = g_sysfont.defaultchar;
	}

	const uint w = getCharWidth(chr);
	const uint h = g_sysfont.height;
	chr -= g_sysfont.firstchar;
	const bitmap_t *tmp = g_sysfont.bits + (g_sysfont.offset ? g_sysfont.offset[chr] : (chr * h));
//printf("Char '%c', width %d\n", chr, w);

	for (y = 0; y < h; y++) {
		const bitmap_t buffer = *tmp++;
		bitmap_t mask = 0x8000;
		for (x = 0; x < w; x++) {
			if ((buffer & mask) != 0)
				ptr[x] = color;
			mask >>= 1;
		}
		ptr += _screenPitch;
	}
#else
	const uint w = 8;
	const uint h = 8;
	const byte *tmp = guifont + 6 + guifont[4] + chr * 8;
	uint buffer = 0;
	uint mask = 0;

	for (y = 0; y < h; y++) {
		for (x = 0; x < w; x++) {
			unsigned char c;
			mask >>= 1;
			if (mask == 0) {
				buffer = *tmp++;
				mask = 0x80;
			}
			c = ((buffer & mask) != 0);
			if (c)
				ptr[x] = color;
		}
		ptr += _screenPitch;
	}
#endif
}

int NewGui::getStringWidth(const String &str) {
	int space = 0;

	for (uint i = 0; i < str.size(); ++i)
		space += getCharWidth(str[i]);
	return space;
}

int NewGui::getCharWidth(byte c) {
#ifdef NEW_FONT_CODE
	// If no width table is specified, return the maximum width
	if (!g_sysfont.width)
		return g_sysfont.maxwidth;
	// If this character is not included in the font, use the default char.
	if (c < g_sysfont.firstchar || g_sysfont.firstchar + g_sysfont.size < c) {
		if (c == ' ')
			return g_sysfont.maxwidth / 2;
		c = g_sysfont.defaultchar;
	}
	return g_sysfont.width[c - g_sysfont.firstchar];
#else
	return guifont[c+6];
#endif
}

void NewGui::drawString(const String &s, int x, int y, int w, NewGuiColor color, int align, int deltax, bool useEllipsis) {
	const int leftX = x, rightX = x + w;
	uint i;
	int width = getStringWidth(s);
	String str;
	
	if (useEllipsis && width > w) {
		// String is too wide. So we shorten it "intellegently", by replacing
		// parts of it by an ellipsis ("..."). There are three possibilities
		// for this: replace the start, the end, or the middle of the string.
		// What is best really depends on the context; but unless we want to
		// make this configurable, replacing the middle probably is a good
		// compromise.
		const int ellipsisWidth = getStringWidth("...");
		
		// SLOW algorithm to remove enough of the middle. But it is good enough
		// for now.
		const int halfWidth = (w - ellipsisWidth) / 2;
		int w2 = 0;
		
		for (i = 0; i < s.size(); ++i) {
			int charWidth = getCharWidth(s[i]);
			if (w2 + charWidth > halfWidth)
				break;
			w2 += charWidth;
			str += s[i];
		}
		// At this point we know that the first 'i' chars are together 'w2'
		// pixels wide. We took the first i-1, and add "..." to them.
		str += "...";
		
		// The original string is width wide. Of those we already skipped past
		// w2 pixels, which means (width - w2) remain.
		// The new str is (w2+ellipsisWidth) wide, so we can accomodate about
		// (w - (w2+ellipsisWidth)) more pixels.
		// Thus we skip ((width - w2) - (w - (w2+ellipsisWidth))) =
		// (width + ellipsisWidth - w)
		int skip = width + ellipsisWidth - w;
		for (; i < s.size() && skip > 0; ++i) {
			skip -= getCharWidth(s[i]);
		}

		// Append the remaining chars, if any
		for (; i < s.size(); ++i) {
			str += s[i];
		}

		width = getStringWidth(str);

	} else {
		str = s;
	}

	if (align == kTextAlignCenter)
		x = x + (w - width - 1)/2;
	else if (align == kTextAlignRight)
		x = x + w - width;
	x += deltax;

	for (i = 0; i < str.size(); ++i) {
		w = getCharWidth(str[i]);
		if (x+w > rightX)
			break;
		if (x >= leftX)
			drawChar(str[i], x, y, color);
		x += w;
	}
}

//
// Blit from a buffer to the display
//
void NewGui::blitFromBuffer(int x, int y, int w, int h, const byte *buf, int pitch) {
	NewGuiColor *ptr = getBasePtr(x, y);

	assert(buf);
	while (h--) {
		memcpy(ptr, buf, w*2);
		ptr += _screenPitch;
		buf += pitch;
	}
}

//
// Blit from the display to a buffer
//
void NewGui::blitToBuffer(int x, int y, int w, int h, byte *buf, int pitch) {
	NewGuiColor *ptr = getBasePtr(x, y);

	assert(buf);
	while (h--) {
		memcpy(buf, ptr, w * 2);
		ptr += _screenPitch;
		buf += pitch;
	}
}

//
// Draw an 8x8 bitmap at location (x,y)
//
void NewGui::drawBitmap(uint32 *bitmap, int x, int y, NewGuiColor color, int h) {
	NewGuiColor *ptr = getBasePtr(x, y);

	for (y = 0; y < h; y++) {
		uint32 mask = 0xF0000000;
		for (x = 0; x < 8; x++) {
			if (bitmap[y] & mask)
				ptr[x] = color;
			mask >>= 4;
		}
		ptr += _screenPitch;
	}
}

//
// Draw the mouse cursor (animated). This is mostly ripped from the cursor code in gfx.cpp
// We could plug in a different cursor here if we like to.
//
void NewGui::animateCursor() {
	int time = _system->get_msecs(); 
	if (time > _cursorAnimateTimer + kCursorAnimateDelay) {
		const byte colors[4] = { 15, 15, 7, 8 };
		const byte color = colors[_cursorAnimateCounter];
		int i;
		
		for (i = 0; i < 15; i++) {
			if ((i < 6) || (i > 8)) {
				_cursor[16 * 7 + i] = color;
				_cursor[16 * i + 7] = color;
			}
		}
	
		_system->set_mouse_cursor(_cursor, 16, 16, 7, 7);

		_cursorAnimateTimer = time;
		_cursorAnimateCounter = (_cursorAnimateCounter + 1) % 4;
	}
}

} // End of namespace GUI

#ifdef __PALM_OS__
#include "scumm_globals.h"

_GINIT(NewGui)
#ifndef NEW_FONT_CODE
_GSETPTR(GUI::guifont, GBVARS_GUIFONT_INDEX, byte, GBVARS_SCUMM)
#endif
_GEND

_GRELEASE(NewGui)
#ifndef NEW_FONT_CODE
_GRELEASEPTR(GBVARS_GUIFONT_INDEX, GBVARS_SCUMM)
#endif
_GEND

#endif