/* ScummVM - Scumm Interpreter
 * Copyright (C) 2002 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 <ctype.h>

#include "stdafx.h"
#include "newgui.h"
#include "dialog.h"
#include "widget.h"
#include "ListWidget.h"

Dialog::~Dialog()
{
	teardownScreenBuf();
}

void Dialog::setupScreenBuf()
{
	// Create _screenBuf if it doesn't already exist
	if (!_screenBuf)
		_screenBuf = new byte[320*200];
	
	// Draw the fixed parts of the dialog: background and border.
	_gui->blendRect(_x, _y, _w, _h, _gui->_bgcolor);
	_gui->box(_x, _y, _w, _h);
	
	// Finally blit this to _screenBuf
	_gui->blitTo(_screenBuf, _x, _y, _w, _h); 
}

void Dialog::teardownScreenBuf()
{
	if (_screenBuf) {
		delete [] _screenBuf;
		_screenBuf = 0;
	}
}

void Dialog::draw()
{
	Widget *w = _firstWidget;

	if (_screenBuf) {
		_gui->blitFrom(_screenBuf, _x, _y, _w, _h); 
	} else {
		_gui->fillRect(_x, _y, _w, _h, _gui->_bgcolor);
		_gui->box(_x, _y, _w, _h);
	}
	_gui->addDirtyRect(_x, _y, _w, _h);

	while (w) {
		w->draw();
		w = w->_next;
	}
}

void Dialog::handleMouseDown(int x, int y, int button)
{
	Widget *w;
	w = findWidget(x, y);

	if (w != _focusedWidget) {
		// The focus will change. Tell the old focused widget (if any)
		// that it lost the focus.
		if (_focusedWidget)
			_focusedWidget->lostFocus();
	
		// Tell the new focused widget (if any) that it just gained the focus.
		if (w)
			w->receivedFocus();
	
		_focusedWidget = w;
	}

	if (_focusedWidget)
		_focusedWidget->handleMouseDown(x - _focusedWidget->_x, y - _focusedWidget->_y, button);
}

void Dialog::handleMouseUp(int x, int y, int button)
{
	Widget *w;
	
	if (_focusedWidget) {
		w = _focusedWidget;
		
		// Lose focus on mouseup unless the widget requested to retain the focus
		if (! (_focusedWidget->getFlags() & WIDGET_RETAIN_FOCUS )) {
			_focusedWidget->lostFocus();
			_focusedWidget = 0;
		}

	} else {
		w = findWidget(x, y);
	}

	if (w)
		w->handleMouseUp(x - w->_x, y - w->_y, button);
}

void Dialog::handleKeyDown(char key, int modifiers)
{
	// ESC closes all dialogs by default
	if (key == 27)
		close();
	
	if (_focusedWidget) {
		_focusedWidget->handleKeyDown(key, modifiers);
	} else {
		// Hotkey handling
		Widget *w = _firstWidget;
		key = toupper(key);
		while (w) {
			if (w->_type == kButtonWidget && key == toupper(((ButtonWidget *)w)->_hotkey)) {
				// We first send a mouseDown then a mouseUp.
				// FIXME: insert a brief delay between both.
				w->handleMouseDown(0, 0, 1);
				w->handleMouseUp(0, 0, 1);
				break;
			}
			w = w->_next;
		}
	}
}

void Dialog::handleKeyUp(char key, int modifiers)
{
	// Focused widget recieves keyup events
	if (_focusedWidget)
		_focusedWidget->handleKeyUp(key, modifiers);
}

void Dialog::handleMouseMoved(int x, int y, int button)
{
	Widget *w;
	
	if (_focusedWidget) {
		w = _focusedWidget;
		
		// We still send mouseEntered/Left messages to the focused item
		// (but to no other items).
		bool mouseInFocusedWidget = (x >= w->_x && x < w->_x + w->_w && y >= w->_y && y < w->_y + w->_h);
		if (mouseInFocusedWidget && _mouseWidget != w) {
			_mouseWidget = w;
			w->handleMouseEntered(button);
		} else if (!mouseInFocusedWidget && _mouseWidget == w) {
			_mouseWidget = 0;
			w->handleMouseLeft(button);
		}
			
	} else {
		w = findWidget(x, y);

		if (_mouseWidget != w) {
			if (_mouseWidget)
				_mouseWidget->handleMouseLeft(button);
			if (w)
				w->handleMouseEntered(button);
			_mouseWidget = w;
		} 

		if (!w || !(w->getFlags() & WIDGET_TRACK_MOUSE)) {
			return;
		}
	}
	
	w->handleMouseMoved(x - w->_x, y - w->_y, button);
}

void Dialog::handleTickle()
{
	// Focused widget recieves tickle notifications
	if (_focusedWidget && _focusedWidget->getFlags() & WIDGET_WANT_TICKLE) {
		_focusedWidget->handleTickle();
	}
}

void Dialog::handleCommand(CommandSender *sender, uint32 cmd, uint32 data)
{
	switch (cmd) {
	case kCloseCmd:
		close();
		break;
	}
}

/*
 * Determine the widget at location (x,y) if any. Assumes the coordinates are
 * in the local coordinate system, i.e. relative to the top left of the dialog.
 */
Widget *Dialog::findWidget(int x, int y)
{
	Widget *w = _firstWidget;
	while (w) {
		// Stop as soon as we find a widget that contains the point (x,y)
		if (x >= w->_x && x < w->_x + w->_w && y >= w->_y && y < w->_y + w->_h)
			break;
		w = w->_next;
	}
	return w;
}

void Dialog::close()
{
	_mouseWidget = 0;
	_focusedWidget = 0;
	_gui->closeTopDialog();
}

void Dialog::addResText(int x, int y, int w, int h, int resID)
{
	// Get the string
	const char *str = _gui->queryResString(resID);
	if (!str)
		str = "Dummy!";
	new StaticTextWidget(this, x, y, w, h, str);
}

void Dialog::addButton(int x, int y, int w, int h, const char *label, uint32 cmd, char hotkey)
{
	new ButtonWidget(this, x, y, w, h, label, cmd, hotkey);
}

#pragma mark -


enum {
	kSaveCmd = 'SAVE',
	kLoadCmd = 'LOAD',
	kPlayCmd = 'PLAY',
	kOptionsCmd = 'OPTN',
	kQuitCmd = 'QUIT'
};

SaveLoadDialog::SaveLoadDialog(NewGui *gui)
	: Dialog (gui, 30, 20, 260, 124)
{
	addResText(10, 7, 240, 16, 1);
//  addResText(10, 7, 240, 16, 2);
//  addResText(10, 7, 240, 16, 3);

	addButton(200, 20, 54, 16, RES_STRING(4), kSaveCmd, 'S');	// Save
	addButton(200, 40, 54, 16, RES_STRING(5), kLoadCmd, 'L');	// Load
	addButton(200, 60, 54, 16, RES_STRING(6), kPlayCmd, 'P');	// Play
	addButton(200, 80, 54, 16, CUSTOM_STRING(17), kOptionsCmd, 'O');	// Options
	addButton(200, 100, 54, 16, RES_STRING(8), kQuitCmd, 'Q');	// Quit
	
	// FIXME - test
	new CheckboxWidget(this, 10, 20, 90, 16, "Toggle me", 0);

	// FIXME - test
	new SliderWidget(this, 110, 20, 80, 16, "Volume", 0);
	
	// FIXME - test
	_savegameList = new ListWidget(this, 10, 40, 180, 74);
}

void SaveLoadDialog::handleCommand(CommandSender *sender, uint32 cmd, uint32 data)
{
	switch (cmd) {
	case kSaveCmd:
		//printf("Saving game in slot %d\n", _savegameList->getSelected());
		break;
	case kLoadCmd:
		//printf("Loading game in slot %d\n", _savegameList->getSelected());
		break;
	case kPlayCmd:
		close();
		break;
	case kOptionsCmd:
		_gui->optionsDialog();
		break;
	case kQuitCmd:
		exit(1);
		break;
	default:
		Dialog::handleCommand(sender, cmd, data);
	}
}


#pragma mark -

enum {
	kSoundCmd = 'SOUN',
	kKeysCmd = 'KEYS',
	kAboutCmd = 'ABOU',
	kMiscCmd = 'OPTN'
};

OptionsDialog::OptionsDialog(NewGui *gui)
	: Dialog (gui, 50, 80, 210, 60)
{
	addButton( 10, 10, 40, 15, CUSTOM_STRING(5), kSoundCmd, 'S');	// Sound
	addButton( 80, 10, 40, 15, CUSTOM_STRING(6), kKeysCmd, 'K');	// Keys
	addButton(150, 10, 40, 15, CUSTOM_STRING(7), kAboutCmd, 'A');	// About
	addButton( 10, 35, 40, 15, CUSTOM_STRING(18), kMiscCmd, 'M');	// Misc
	addButton(150, 35, 40, 15, CUSTOM_STRING(23), kCloseCmd, 'C');	// Close dialog - FIXME
}

void OptionsDialog::handleCommand(CommandSender *sender, uint32 cmd, uint32 data)
{
	switch (cmd) {
	case kSoundCmd:
		break;
	case kKeysCmd:
		break;
	case kAboutCmd:
		_gui->aboutDialog();
		break;
	case kMiscCmd:
		break;
	default:
		Dialog::handleCommand(sender, cmd, data);
	}
}


#pragma mark -


PauseDialog::PauseDialog(NewGui *gui)
	: Dialog (gui, 50, 80, 220, 16)
{
	addResText(4, 4, 220, 16, 10);
}