instruction.cpp

Trolltech公司发布的图形界面操作系统。可在qt-embedded-2.3.10平台上编译为嵌入式图形界面操作系统。

/**********************************************************************
** Copyright (C) 2000-2005 Trolltech AS.  All rights reserved.
**
** This file is part of the Qtopia Environment.
** 
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** 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.
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** A copy of the GNU GPL license version 2 is included in this package as 
** LICENSE.GPL.
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** 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.
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** the code of this program with Qtopia applications copyrighted, developed
** and distributed by Trolltech under the terms of the Qtopia Personal Use
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** in all respects for all of the code used other than the applications
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#include "instruction.h"
#include "engine.h"

Instruction::Instruction() {
    precedence = 0;
    name = type = retType = "NULL";
    argCount = 0;
    cache = 0;
}

Instruction::~Instruction() {
    delete cache;
};
void Instruction::eval(){qWarning("empty instruction called");}

QPixmap* Instruction::draw() {
    if (!cache) {
	QFont myFont = QFont( "helvetica", 24, QFont::Bold );
	QRect bRect = QFontMetrics(myFont).boundingRect(0,0,240,20,Qt::AlignLeft,displayString);
	cache = new QPixmap(bRect.width(),bRect.height());
	cache->fill();
	QPainter p(cache);
	p.setPen(Qt::black);
	p.setFont(myFont);
	p.drawText(0,0,bRect.width(),bRect.height(),Qt::AlignRight,displayString);
    }
    return cache;
}