mywidget.cpp

这是学习QT的好代码啊

#include "mywidget.h"

MyWidget::MyWidget(QWidget *parent)
    :QWidget(parent)
{
    quit = new QPushButton(tr("Quit"));
    quit->setFont(QFont("Times",18,QFont::Bold));
    
    connect(quit,SIGNAL(clicked()),qApp,SLOT(quit()) );
    
    canvas = new Canvas;
    
    Qt::PenStyle style =
        (Qt::PenStyle)1;
    Qt::PenCapStyle cap =
        (Qt::PenCapStyle)1;
    Qt::PenJoinStyle join =
        (Qt::PenJoinStyle)1;
    canvas->setPen(QPen(Qt::blue,2,style,cap,join));
    
    gridLayout = new QGridLayout;
    gridLayout->addWidget(canvas,0,0);
    //gridLayout->addWidget(quit,1,0);
    setLayout(gridLayout);

}

MyWidget::~MyWidget()
{
    delete quit;
    delete gridLayout;
    delete canvas;
    quit       = 0;
    gridLayout = 0;
    canvas     = 0;
}