added walkthrough

svn-id: r15835

3 files changed, 324 insertions, 0 deletions

diff --git a/gui/module.mk b/gui/module.mk
index 443cb96fef..ca6946740c 100644
--- a/gui/module.mk
+++ b/gui/module.mk
@@ -16,6 +16,7 @@ MODULE_OBJS := \
 	gui/PopUpWidget.o \
 	gui/ScrollBarWidget.o \
 	gui/TabWidget.o \
+	gui/walkthrough.o \
 	gui/widget.o
 
 MODULE_DIRS += \
diff --git a/gui/walkthrough.cpp b/gui/walkthrough.cpp
new file mode 100644
index 0000000000..706f729f9e
--- /dev/null
+++ b/gui/walkthrough.cpp
@@ -0,0 +1,247 @@
+/* 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/file.h"
+
+#include "graphics/font.h"
+
+#include "gui/walkthrough.h"
+#include "gui/ScrollBarWidget.h"
+
+namespace GUI {
+
+extern const Graphics::NewFont g_consolefont;
+
+#define kConsoleCharWidth	(g_consolefont.getMaxCharWidth())
+#define kConsoleLineHeight	(g_consolefont.getFontHeight() + 2)
+
+
+
+WalkthroughDialog::WalkthroughDialog(float widthPercent, float heightPercent)
+	: Dialog(0, 0, 1, 1),
+	_initialized(false), _widthPercent(widthPercent), _heightPercent(heightPercent) {
+}
+
+WalkthroughDialog::~WalkthroughDialog() {
+	destroy();
+}
+
+static int getNextWordLength(byte *src, int maxLength) {
+	int l;
+
+	for (l = 0; l < maxLength; l++) {
+		byte tmp = src[l];
+		if ((tmp >= 0) && (tmp <= ' '))
+			break;
+	}
+
+	return l;
+}
+
+bool WalkthroughDialog::loadWalkthroughText(const char *gameName) {
+	char filename[MAX_PATH];
+	File file;
+
+	sprintf(filename, "%s.wkt", gameName);
+	file.open(filename);
+	if (!file.isOpen())
+		return false;
+	int bufferSize = file.size();
+	byte *buffer = (byte *)malloc(bufferSize);
+	file.read(buffer, bufferSize);
+	file.close();
+
+	int currentLinePos = 0;
+	byte *currentBuffer = buffer;
+	byte *lineBuffer = (byte *)malloc(_lineWidth + 1);
+	lineBuffer[0] = 0;
+
+	for (;;) {
+		if ((currentBuffer - buffer) >= bufferSize)
+			break;
+		int wordLength = getNextWordLength(currentBuffer, _lineWidth);
+		if (((currentLinePos + wordLength) < _lineWidth) && 
+				((*currentBuffer != 0x0a) && (*currentBuffer != 0x0d))) {
+			if ((*currentBuffer >= 0) && (*currentBuffer <= ' ')) {
+				lineBuffer[currentLinePos++] = ' ';
+				currentBuffer++;
+			} else {
+				memcpy(lineBuffer + currentLinePos, currentBuffer, wordLength);
+				currentLinePos += wordLength;
+				currentBuffer += wordLength;
+				if ((currentLinePos + 1) < _lineWidth) {
+					lineBuffer[currentLinePos] = ' ';
+					currentLinePos++;
+				}
+			}
+		} else {
+			if (*currentBuffer == 0x0d) {
+				currentBuffer++;
+				if ((*currentBuffer == 0x0a) && ((currentBuffer - buffer) < bufferSize)) {
+					currentBuffer++;
+				}
+			} else if (*currentBuffer == 0x0a) {
+				currentBuffer++;
+			}
+			lineBuffer[currentLinePos] = 0;
+			Entry line;
+			line.text = String((char *)lineBuffer);
+			_linesArray.push_back(line);
+			lineBuffer[0] = 0;
+			currentLinePos = 0;
+		}
+	}
+
+	free(buffer);
+	free(lineBuffer);
+
+	return true;
+}
+
+void WalkthroughDialog::create(const char *gameName) {
+	// Setup basic layout/dialog size
+	reflowLayout();
+
+	// Add scrollbar
+	_scrollBar = new ScrollBarWidget(this, _w - kScrollBarWidth - 1, 0, kScrollBarWidth, _h);
+	_scrollBar->setTarget(this);
+
+	_currentPos = 0;
+	_scrollLine = _linesPerPage - 1;
+
+	loadWalkthroughText(gameName);
+
+	_initialized = true;
+}
+
+void WalkthroughDialog::destroy() {
+	if (!_initialized)
+		return;
+
+	_linesArray.clear();
+
+	_initialized = false;
+}
+
+void WalkthroughDialog::reflowLayout() {
+	// Calculate the real width/height (rounded to char/line multiples)
+	_w = (uint16)(_widthPercent * g_system->getOverlayWidth());
+	_h = (uint16)((_heightPercent * g_system->getOverlayHeight() - 2) / kConsoleLineHeight);
+	_h = _h * kConsoleLineHeight + 2;
+
+	// Calculate depending values
+	_lineWidth = (_w - kScrollBarWidth - 2) / kConsoleCharWidth;
+	_linesPerPage = (_h - 2) / kConsoleLineHeight;
+}
+
+void WalkthroughDialog::open() {
+	Dialog::open();
+}
+
+void WalkthroughDialog::drawDialog() {
+	// Blend over the background
+	g_gui.fillRect(_x, _y, _w, _h, g_gui._bgcolor);
+
+	// Draw a border
+	g_gui.hLine(_x, _y + _h - 1, _x + _w - 1, g_gui._color);
+
+	// Draw text
+	int y = _y + 2;
+
+	for (int line = 0; (line < _linesPerPage) && ((_currentPos + line) < (int)_linesArray.size()); line++) {
+		const char *text = _linesArray[line + _currentPos].text.c_str();
+		int textLen = strlen(text);
+		int x = _x + 1;
+		for (int column = 0; (column < _lineWidth) && (column < textLen); column++) {
+			byte c = text[column];
+			g_gui.drawChar(c, x, y, g_gui._textcolor, &g_consolefont);
+			x += kConsoleCharWidth;
+		}
+		y += kConsoleLineHeight;
+	}
+
+	// Draw the scrollbar
+	_scrollBar->_numEntries = _linesArray.size();
+	_scrollBar->_currentPos = _currentPos;
+	_scrollBar->_entriesPerPage = _linesPerPage;
+	_scrollBar->recalc();
+	_scrollBar->draw();
+
+	// Finally blit it all to the screen
+	g_gui.addDirtyRect(_x, _y, _w, _h);
+}
+
+
+void WalkthroughDialog::handleCommand(CommandSender *sender, uint32 cmd, uint32 data) {
+	switch (cmd) {
+	case kSetPositionCmd:
+		_currentPos = _scrollBar->_currentPos;
+		drawDialog();
+		break;
+	default:
+		return;
+	}
+}
+
+void WalkthroughDialog::handleMouseWheel(int x, int y, int direction) {
+	_scrollBar->handleMouseWheel(x, y, direction);
+}
+
+void WalkthroughDialog::handleKeyDown(uint16 ascii, int keycode, int modifiers) {
+	if ((modifiers == OSystem::KBD_CTRL) && (keycode == 'w')) {
+		close();
+		return;
+	}
+	switch (keycode) {
+	case 256 + 17:	// up arrow
+		_currentPos--;
+		break;
+	case 256 + 18:	// down arrow
+		_currentPos++;
+		break;
+	case 256 + 22:	// home
+		_currentPos = 0;
+		break;
+	case 256 + 23:	// end
+		_currentPos = _linesArray.size() - _linesPerPage;
+		break;
+	case 256 + 24:	// page up
+		_currentPos -= _linesPerPage;
+		break;
+	case 256 + 25:	// page down
+		_currentPos += _linesPerPage;
+		break;
+	default:
+		return;
+	}
+	if (_currentPos < 0) {
+		_currentPos = 0;
+	}
+	if ((_currentPos + _linesPerPage) >= (int)_linesArray.size()) {
+		_currentPos = _linesArray.size() - _linesPerPage;
+	}
+
+	drawDialog();
+}
+
+
+} // End of namespace GUI
diff --git a/gui/walkthrough.h b/gui/walkthrough.h
new file mode 100644
index 0000000000..2162156ba6
--- /dev/null
+++ b/gui/walkthrough.h
@@ -0,0 +1,76 @@
+/* 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.
+ *
+ * $Header$
+ */
+
+#ifndef WALKTHROUGH_DIALOG_H
+#define WALKTHROUGH_DIALOG_H
+
+#include "common/array.h"
+#include "common/str.h"
+
+#include "gui/dialog.h"
+#include "gui/newgui.h"
+
+#include <stdarg.h>
+
+namespace GUI {
+
+class ScrollBarWidget;
+
+class WalkthroughDialog : public Dialog {
+private:
+	bool _initialized;
+	int	_lineWidth;
+	int	_linesPerPage;
+	int	_currentPos;
+	int	_scrollLine;
+	int	_firstLineInBuffer;
+
+	typedef Common::String String;
+
+	struct Entry {
+		String text;
+	};
+	typedef Common::Array<Entry> EntryList;
+	EntryList _linesArray;
+
+	ScrollBarWidget *_scrollBar;
+
+	float _widthPercent, _heightPercent;
+
+	void reflowLayout();
+	bool loadWalkthroughText(const char *gameName);
+
+public:
+	WalkthroughDialog(float widthPercent, float heightPercent);
+	~WalkthroughDialog();
+
+	void create(const char *gameName);
+	void destroy();
+	void open();
+	void drawDialog();
+
+	void handleMouseWheel(int x, int y, int direction);
+	void handleKeyDown(uint16 ascii, int keycode, int modifiers);
+	void handleCommand(CommandSender *sender, uint32 cmd, uint32 data);
+};
+
+} // End of namespace GUI
+
+#endif