conversion.h

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.
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** This file is part of the Phone Edition of the Qtopia Toolkit.
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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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#ifdef ENABLE_CONVERSION

#ifndef CONVERSIONIMPL_H
#define CONVERSIONIMPL_H

#include "../engine.h"
#include "../doubleinstruction.h"
#include "stdinputwidgets.h"

#include <QPushButton>
#include <QStackedWidget>
#include <QComboBox>

extern Engine *systemEngine;

class UnitConversionInstruction : public BaseDoubleInstruction {
public:
    UnitConversionInstruction():BaseDoubleInstruction(){
	name = "UnitConversion";
	retType = type = "Double";
	argCount = 1;
	precedence = 0;
    };
    ~UnitConversionInstruction(){};

   void doEvalI(DoubleData *acc) {
	DoubleData *result = new DoubleData();
	if (tempFrom != 'n' && tempTo != 'n') {
	    double tmp = acc->get();

	    if (tempFrom == 'k')
		tmp -= 273;
	    if (tempFrom == 'f')
		tmp = (tmp - 32) * 5 / 9;
	    if (tempTo == 'k')
		tmp += 273;
	    if (tempTo == 'f')
		tmp = tmp / 5 * 9 + 32;

	    result->set(tmp);
	} else {
	    result->set(acc->get() * to / from);
	}
	systemEngine->putData(result);
    };

    static double from;
    static double to;
    static char tempFrom;
    static char tempTo;
};

struct conversionData {
    QString name;
    double factor;
    QPushButton *button;
};

struct conversionMode {
    QString name;
    QList<conversionData*> *dataList;
    conversionData *defaultType;
};

class FormConversion:public DecimalInputWidget {
    Q_OBJECT
public:
    FormConversion(QWidget * parent = 0);
    ~FormConversion();
    
    QString interfaceName() { return QString(tr("Conversion")); };

public slots:
    void celciusButtonClicked ();
    void fahrenheitButtonClicked ();
    void kelvinButtonClicked ();
    
protected:
    void showEvent ( QShowEvent * );
    void init(int fromRow, int fromCol);
    
private:
    QPushButton *PBC;
    QList<conversionMode*> *modeList;
    QComboBox *typeSelector;
    QStackedWidget *conversionStack;

    double currentFactor, newFactor;
    QPushButton *currentButton, *newButton;

    void doConversion();

public slots:
    void selectType(int);
    void conversionButtonClicked();

private slots:
    void CClicked();
};

#endif //CONVERSIONIMPL_H
#endif //ENABLE_CONVERSION