Qt4.4.3自带教程-复杂的布局

// 稍微复杂点的布局


#include <QApplication>


#include <QFont>


#include <QGridLayout>


#include <QLCDNumber>


#include <QPushButton>


#include <QSlider>


#include <QVBoxLayout>


#include <QWidget>




//LCDRange类


class LCDRange : public QWidget


{


public:


LCDRange(QWidget *parent = 0);


};




LCDRange::LCDRange(QWidget *parent)


: QWidget(parent)


{


//LCD数字


QLCDNumber *lcd = new QLCDNumber(2);


lcd->setSegmentStyle(QLCDNumber::Flat);




//Slider


QSlider *slider = new QSlider(Qt::Horizontal);


slider->setRange(0, 99);


slider->setValue(0);


connect(slider, SIGNAL(valueChanged(int)),lcd, SLOT(display(int)));




//布局


QVBoxLayout *layout = new QVBoxLayout;


layout->addWidget(lcd);


layout->addWidget(slider);


setLayout(layout);


}




class MyWidget : public QWidget


{


public:


MyWidget(QWidget *parent = 0);


};






//MyWidget类


MyWidget::MyWidget(QWidget *parent)


: QWidget(parent)


{


//创建quit按钮


QPushButton *quit = new QPushButton(tr("Quit"));


quit->setFont(QFont("Times", 18, QFont::Bold));


connect(quit, SIGNAL(clicked()), qApp, SLOT(quit()));




//网格布局


QGridLayout *grid = new QGridLayout;


for (int row = 0; row < 3; ++row) {


for (int column = 0; column < 3; ++column) {


LCDRange *lcdRange = new LCDRange;//创建LCD+Slider


grid->addWidget(lcdRange, row, column);


}


}




QVBoxLayout *layout = new QVBoxLayout;


layout->addWidget(quit);


layout->addLayout(grid);//子布局




setLayout(layout);//设置布局


}




int main(int argc, char *argv[])


{


QApplication app(argc, argv);




//创建MyWidget的一个实例


MyWidget widget;


widget.show();




return app.exec();


}

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