phoneinstruction.cpp

嵌入式Qt下的一个计算器源码

/****************************************************************************
**
** Copyright (C) 2000-2006 TROLLTECH ASA. All rights reserved.
**
** This file is part of the Phone Edition of the Qtopia Toolkit.
**
** Licensees holding a valid license agreement from Trolltech or any of its
** authorized distributors may use this file in accordance with
** the License Agreement provided with the Licensed Software.
**
** See http://www.trolltech.com/pricing.html or email [e-mail] for
**   information about Trolltech's Commercial License Agreements.
**
** Contact [e-mail] if any conditions of this licensing are
** not clear to you.
**
**
**
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/

#include "phoneinstruction.h"
#include "engine.h"

#include <QBitmap>

// Factory
iPhoneDoubleFactory::iPhoneDoubleFactory():Instruction() {
    retType = type = "Double"; // No tr
    name = "Factory"; // No tr
}
void iPhoneDoubleFactory::eval() {
    DoubleData *newData = new DoubleData();
    newData->clear();
    systemEngine->dStack.push(newData);
}

// Copy
iPhoneDoubleCopy::iPhoneDoubleCopy():Instruction() {
    name = "Copy"; // No tr
    retType = type = "Double"; // No tr
    argCount = 1;
}
void iPhoneDoubleCopy::eval() {
    DoubleData *src = (DoubleData *)systemEngine->dStack.pop();
    DoubleData *tgt = new DoubleData();
    tgt->clear();
    tgt->set(((DoubleData *)src)->get());
    systemEngine->dStack.push(src);
    systemEngine->dStack.push(tgt);
};

iEvaluateLine::iEvaluateLine():Instruction() {
    name = "EvaluateLine"; // No tr
    retType = type = "Double"; // No tr
    argCount = 2;
    precedence = 1;
}
QPixmap *iEvaluateLine::draw() {
    if (!cache) {
	cache = new QBitmap(50,3);
        cache->clear();
	QPainter p(cache);
	p.setPen(Qt::color1);
	p.drawLine(0,1,50,1);
    }
    return cache;
}

// Basic functions without precedence
iPhoneAddDoubleDouble::iPhoneAddDoubleDouble():Instruction() {
    name = "Add"; // No tr
    precedence = 10;
    displayString = "+";
    argCount = 2;
}
void iPhoneAddDoubleDouble::eval() {
    DoubleData *acc = (DoubleData *)systemEngine->getData();
    DoubleData *num = (DoubleData *)systemEngine->getData();
    DoubleData *result = new DoubleData();
    result->set(num->get() + acc->get());
    systemEngine->putData(result);
    delete num;
    delete acc;
}

iPhoneSubtractDoubleDouble::iPhoneSubtractDoubleDouble():Instruction() {
    name = "Subtract"; // No tr
    precedence = 10;
    displayString = "-";
    argCount = 2;
}
void iPhoneSubtractDoubleDouble::eval() {
    DoubleData *acc = (DoubleData *)systemEngine->getData();
    DoubleData *num = (DoubleData *)systemEngine->getData();
    DoubleData *result = new DoubleData();
    result->set(num->get() - acc->get());
    systemEngine->putData(result);
    delete num;
    delete acc;
}

iPhoneMultiplyDoubleDouble::iPhoneMultiplyDoubleDouble():Instruction() {
    name = "Multiply"; // No tr
    precedence = 10;
    displayString = "x";
    argCount = 2;
}
void iPhoneMultiplyDoubleDouble::eval() {
    DoubleData *acc = (DoubleData *)systemEngine->getData();
    DoubleData *num = (DoubleData *)systemEngine->getData();
    DoubleData *result = new DoubleData();
    result->set(num->get() * acc->get());
    systemEngine->putData(result);
    delete num;
    delete acc;
}

iPhoneDivideDoubleDouble::iPhoneDivideDoubleDouble():Instruction() {
    name = "Divide"; // No tr
    precedence = 10;
    displayString = "/";
    argCount = 2;
}
void iPhoneDivideDoubleDouble::eval() {
    DoubleData *acc = (DoubleData *)systemEngine->getData();
    DoubleData *num = (DoubleData *)systemEngine->getData();
    if (acc->get() == 0) {
	systemEngine->setError(eDivZero);
    } else {
	DoubleData *result = new DoubleData();
	result->set(num->get() / acc->get());
	systemEngine->putData(result);
    }
    delete num;
    delete acc;
}