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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
/*
* This code is based on the original source code of Lord Avalot d'Argent version 1.3.
* Copyright (c) 1994-1995 Mike, Mark and Thomas Thurman.
*/
/* Original name: HELPER The help system unit. */
#include "avalanche/avalanche.h"
#include "avalanche/help.h"
#include "common/scummsys.h"
namespace Avalanche {
Help::Help(AvalancheEngine *vm) {
_vm = vm;
for (int i = 0; i < 10; i++) {
_buttons[i]._trigger = Common::KEYCODE_INVALID;
_buttons[i]._whither = 0;
}
_highlightWas = 0;
_buttonNum = 0;
_holdLeft = false;
}
/**
* Loads and draws the chosen page of the help.
* @remarks Originally called 'getme'
*/
void Help::switchPage(byte which) {
// Help icons are 80x20.
_highlightWas = 177; // Forget where the highlight was.
Common::File file;
if (!file.open("help.avd"))
error("AVALANCHE: Help: File not found: help.avd");
file.seek(which * 2);
uint16 offset = file.readUint16LE();
file.seek(offset);
Common::String title = getLine(file);
_vm->_graphics->drawFilledRectangle(Common::Rect(0, 0, 640, 200), kColorBlue);
_vm->_graphics->drawFilledRectangle(Common::Rect(8, 40, 450, 200), kColorWhite);
byte index = file.readByte();
_vm->_graphics->helpDrawButton(-177, index);
// Plot the title:
_vm->_graphics->drawNormalText(title, _vm->_font, 8, 629 - 8 * title.size(), 26, kColorBlack);
_vm->_graphics->drawNormalText(title, _vm->_font, 8, 630 - 8 * title.size(), 25, kColorCyan);
_vm->_graphics->drawBigText("help!", _vm->_font, 8, 549, 1, kColorBlack);
_vm->_graphics->drawBigText("help!", _vm->_font, 8, 550, 0, kColorCyan);
byte y = 0;
do {
Common::String line = getLine(file);
if (!line.empty()) {
if (line.compareTo(Common::String('!')) == 0) // End of the help text is signalled with a '!'.
break;
if (line[0] == '\\') {
line.deleteChar(0);
_vm->_graphics->drawNormalText(line, _vm->_font, 8, 16, 41 + y * 10, kColorRed);
}
else
_vm->_graphics->drawNormalText(line, _vm->_font, 8, 16, 41 + y * 10, kColorBlack);
}
y++;
} while (true);
// We are now at the end of the text. Next we must read the icons:
y = 0;
_buttonNum = 0;
while (!file.eos()) {
int trigger = file.readByte();
if (trigger == 177)
break;
switch (trigger) {
case 254: // Escape
trigger = 27;
break;
case 214: // PageUp
trigger = 280;
break;
case 216: // PageDown
trigger = 281;
break;
default: // A - Z
// The characters are stored in the file in uppercase, but we need the lowercase versions for KeyCode:
trigger = tolower(trigger);
break;
}
_buttons[y]._trigger = Common::KeyCode(trigger);
index = file.readByte();
if (_buttons[y]._trigger != Common::KEYCODE_INVALID)
_vm->_graphics->helpDrawButton(13 + (y + 1) * 27, index);
_buttons[y]._whither = file.readByte(); // This is the position to jump to.
Common::String text = "";
switch (_buttons[y]._trigger) {
case Common::KEYCODE_ESCAPE:
text = Common::String("Esc");
break;
case Common::KEYCODE_PAGEUP:
text = Common::String(24);
break;
case Common::KEYCODE_PAGEDOWN:
text = Common::String(25);
break;
default:
text = Common::String(toupper(_buttons[y]._trigger));
break;
}
_vm->_graphics->drawBigText(text, _vm->_font, 8, 589 - (text.size() * 8), 18 + (y + 1) * 27, kColorBlack);
_vm->_graphics->drawBigText(text, _vm->_font, 8, 590 - (text.size() * 8), 17 + (y + 1) * 27, kColorCyan);
y++;
_buttonNum++;
}
_vm->_graphics->refreshScreen();
file.close();
}
Common::String Help::getLine(Common::File &file) {
Common::String line;
byte length = file.readByte();
for (int i = 0; i < length; i++) {
char c = file.readByte();
line += (c ^ 177);
}
return line;
}
bool Help::handleMouse(const Common::Event &event) {
Common::Point mousePos;
mousePos.x = event.mouse.x;
mousePos.y = event.mouse.y / 2;
int index = -1;
if (event.type == Common::EVENT_LBUTTONUP) { // Clicked *somewhere*...
_holdLeft = false;
if ((mousePos.x < 470) || (mousePos.x > 550) || (((mousePos.y - 13) % 27) > 20))
index = -1;
else // Clicked on a button.
index = ((mousePos.y - 13) / 27) - 1;
} else { // LBUTTONDOWN or MOUSEMOVE
int highlightIs = 0;
// Decide which button we are hovering the cursor over:
if ((mousePos.x > 470) && (mousePos.x <= 550) && (((mousePos.y - 13) % 27) <= 20)) { // No click, so highlight.
highlightIs = (mousePos.y - 13) / 27 - 1;
if ((highlightIs < 0) || (5 < highlightIs))
highlightIs = 177; // In case of silly values.
} else
highlightIs = 177;
Color highlightColor = kColorLightblue;
// If we clicked on a button or we are holding down the button, we have to highlight it with cyan:
if (((highlightIs != 177) && ((event.type == Common::EVENT_LBUTTONDOWN)) || _holdLeft)) {
_holdLeft = true;
highlightColor = kColorLightcyan;
}
// Erase the previous highlight only if it's needed:
if (_highlightWas != highlightIs)
_vm->_graphics->helpDrawHighlight(_highlightWas, kColorBlue);
// Highligt the current one with the proper color:
if (_buttons[highlightIs]._trigger != Common::KEYCODE_INVALID) {
_highlightWas = highlightIs;
_vm->_graphics->helpDrawHighlight(highlightIs, highlightColor);
}
}
if ((index >= 0) && (_buttons[index]._trigger != Common::KEYCODE_INVALID)) {
if (_buttons[index]._trigger == Common::KEYCODE_ESCAPE)
return true;
else {
_vm->fadeOut();
switchPage(_buttons[index]._whither);
_vm->fadeIn();
return false;
}
}
return false;
}
bool Help::handleKeyboard(const Common::Event &event) {
if (event.kbd.keycode == Common::KEYCODE_ESCAPE)
return true;
for (int i = 0; i < _buttonNum; i++) {
if (_buttons[i]._trigger == event.kbd.keycode) {
_vm->fadeOut();
switchPage(_buttons[i]._whither);
_vm->fadeIn();
return false;
}
}
return false;
}
/**
* @remarks Originally called 'boot_help'
*/
void Help::run() {
_vm->_graphics->saveScreen();
_vm->fadeOut();
switchPage(0);
_vm->fadeIn();
_vm->_graphics->loadMouse(kCurHelp);
// Originally it was the body of 'continue_help':
bool close = false;
while (!_vm->shouldQuit() && !close) {
Common::Event event;
_vm->getEvent(event);
if (event.type == Common::EVENT_KEYDOWN)
close = handleKeyboard(event);
else if ((event.type == Common::EVENT_LBUTTONDOWN) || (event.type == Common::EVENT_LBUTTONUP) || (event.type == Common::EVENT_MOUSEMOVE))
close = handleMouse(event);
_vm->_graphics->refreshScreen();
}
// End of 'continue_help'.
_vm->fadeOut();
_vm->_graphics->restoreScreen();
_vm->_graphics->removeBackup();
_vm->fadeIn();
}
} // End of namespace Avalanche
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