myparameter.cpp

图形软件,用QT编写的,可以用来学习软件的

/*****************************************************************************
*******************************************************************************
**                                                                           **
**    equal III the graphic builder                                          **
**                                                                           **
**    Copyright (C) 2003 Oleksiy Pylypenko                                   **
**                                                                           **
** This file may be distributed and/or modified under the terms of the       **
** GNU General Public License version 2 as published by the Free Software    **
** Foundation and appearing in the file license included in the              **
** packaging of this file.                                                   **
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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. **
**                                                                           **
** Contact [e-mail] if any conditions of this licensing are         **
** not clear to you.                                                         **
**                                                                           **
**                                                                           **
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#include <qlayout.h>
#include <qlabel.h>
#include <qvalidator.h>

#include "myparameter.h"

void myParameter::clear(void){
	paramEdit->setText("1");
	setParameter(0);
}

myParameter::myParameter( QWidget *parent)
	: QWidget( parent )
{
    QBoxLayout *topLayout = new QVBoxLayout( this , 2 );

	paramEdit = new QLineEdit(this);
	paramEdit->setFixedWidth(50);
	paramEdit->setValidator(new QDoubleValidator(this));

	topLayout->setStretchFactor(paramEdit,1);
    
	QBoxLayout *lineLayout = new QHBoxLayout( topLayout , 2 );
	lineLayout->addWidget(new QLabel(tr("Parameter change step:"),this));
	lineLayout->addWidget(paramEdit,2);

	
	topLayout->addWidget(new QLabel(tr("To change parameter  use Alt+Up/Alt+Down"),this),1);

	paramLabel = 0;
	clear();
//	this->connect(this,SIGNAL(update()),SIGNAL(update()));
}


void myParameter::setParameter(double value){
	aparameter = value;
	if(paramLabel)
		paramLabel->setText(QString(" t = %1").arg(aparameter));
	update();
}

double myParameter::parameter(void){
	return aparameter;
}

void myParameter::changed(void){
	update();
}

double myParameter::step(void){
	return paramEdit->text().toDouble();
}