data.cpp

嵌入式Qt下的一个计算器源码

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**
** Copyright (C) 2000-2006 TROLLTECH ASA. All rights reserved.
**
** This file is part of the Phone Edition of the Qtopia Toolkit.
**
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** authorized distributors may use this file in accordance with
** the License Agreement provided with the Licensed Software.
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**   information about Trolltech's Commercial License Agreements.
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** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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****************************************************************************/

#include "data.h"

Data::Data(){
    clear();
    cache = 0;
};
Data::~Data() {
    delete cache;
};

bool Data::push(char,bool) {
    return false;
}

bool Data::del() {
    return true;
}

void Data::clear() {}

QString Data::getType() {
    return QString("NONE");
}

QString Data::getFormattedOutput() {
    return formattedOutput;
}

QPixmap* Data::draw() {
    QString currentOutput = getFormattedOutput();
    static QFont myFont = QFont( "helvetica", 24, QFont::Bold );
    if (cachedOutput != currentOutput) {
	delete cache;
	cache = 0;
    }
    if (!cache) {
	cachedOutput = currentOutput;
	QRect bRect = QFontMetrics(myFont).boundingRect(0,0,240,20,Qt::AlignLeft,cachedOutput);
        cache = new QBitmap(bRect.size());
        cache->clear();
	QPainter p(cache);
	p.setPen(Qt::color1);
	p.setFont(myFont);
	p.drawText(0,0,bRect.width(),bRect.height(),Qt::AlignRight,cachedOutput);
    }
    return cache;
}