[Qt实例]各类位置信息

geometry.h

#ifndef GEOMETRY_H
#define GEOMETRY_H
#include <QtGui>
class Geometry : public QDialog
{
Q_OBJECT
public:
Geometry();
QLabel *label1;
QLabel *label2;
QLabel *label3;
QLabel *label4;
QLabel *label5;
QLabel *label6;
QLabel *label7;
QLabel *label8;
QLabel *label9;
QLabel *xLabel;
QLabel *yLabel;
QLabel *frameGeoLabel;
QLabel *posLabel;
QLabel *geoLabel;
QLabel *widthLabel;
QLabel *heightLabel;
QLabel *rectLabel;
QLabel *sizeLabel;
void updateLabel();
protected:
void moveEvent(QMoveEvent *);
void resizeEvent(QResizeEvent *);
};
#endif // GEOMETRY_H

 

geometry.cpp

#include "geometry.h"
Geometry::Geometry()
{
    setWindowTitle(tr("Geometry"));
    label1 = new QLabel;
    label1->setText("x():");
    label2 = new QLabel;
    label2->setText("y():");
    label3 = new QLabel;
    label3->setText("frameGeometry():");
    label4 = new QLabel;
    label4->setText("pos():");
    label5 = new QLabel;
    label5->setText("geometry():");
    label6 = new QLabel;
    label6->setText("width():");
    label7 = new QLabel;
    label7->setText("height():");
    label8 = new QLabel;
    label8->setText("rect():");
    label9 = new QLabel;
    label9->setText("size():");
    xLabel = new QLabel;
    yLabel = new QLabel;
    frameGeoLabel = new QLabel;
    posLabel = new QLabel;
    geoLabel = new QLabel;
    widthLabel = new QLabel;
    heightLabel = new QLabel;
    rectLabel = new QLabel;
    sizeLabel = new QLabel;
    QGridLayout *layout = new QGridLayout(this);
    layout->setMargin(20);
    layout->setSpacing(10);
    int l = 0;
    int c = 1;
    layout->addWidget(label1,0,l);
    layout->addWidget(xLabel,0,c);
    layout->addWidget(label2,1,l);
    layout->addWidget(yLabel,1,c);
    layout->addWidget(label3,2,l);
    layout->addWidget(frameGeoLabel,2,c);
    layout->addWidget(label4,3,l);
    layout->addWidget(posLabel,3,c);
    layout->addWidget(label5,4,l);
    layout->addWidget(geoLabel,4,c);
    layout->addWidget(label6,5,l);
    layout->addWidget(widthLabel,5,c);
    layout->addWidget(label7,6,l);
    layout->addWidget(heightLabel,6,c);
    layout->addWidget(label8,7,l);
    layout->addWidget(rectLabel,7,c);
    layout->addWidget(label9,8,l);
    layout->addWidget(sizeLabel,8,c);
    updateLabel();
}
void Geometry::updateLabel()
{
    QString temp;
    QString str_x;
    xLabel->setText(str_x.setNum(x()));
    QString str_y;
    yLabel->setText(str_y.setNum(y()));
    QString frameGeo;
    frameGeo = temp.setNum(frameGeometry().x()) + ", " + temp.setNum(frameGeometry().y()) + ", " +
        temp.setNum(frameGeometry().width()) + ", " + temp.setNum(frameGeometry().height());
    frameGeoLabel->setText(frameGeo);
    QString position ;
    position = temp.setNum(pos().x()) + ", " + temp.setNum(pos().y());
    posLabel->setText(position);
    QString geo;
    geo = temp.setNum(geometry().x()) + ", " + temp.setNum(geometry().y()) + ", " +
        temp.setNum(geometry().width()) + ", " + temp.setNum(geometry().height());
    geoLabel->setText(geo);
    QString w;
    widthLabel->setText(w.setNum(width()));
    QString h;
    heightLabel->setText(h.setNum(height()));
    QString r;
    r = temp.setNum(rect().x()) + ", " + temp.setNum(rect().y()) + ", " +
        temp.setNum(rect().width()) + ", " + temp.setNum(rect().height());
    rectLabel->setText(r);
    QString s;
    s = temp.setNum(size().width()) + ", " + temp.setNum(size().height());
    sizeLabel->setText(s);
}
void Geometry::moveEvent(QMoveEvent *)
{
    updateLabel();
}
void Geometry::resizeEvent(QResizeEvent *)
{
    updateLabel();
}

main.cpp

#include "geometry.h"
#include <QApplication>
int main(int argc, char *argv[])
{
    QFont font("ZYSong18030",12);
    QApplication::setFont(font);
    QApplication app(argc,argv);
    QTranslator translator(0);
    translator.load("geometry_zh",".");
    app.installTranslator(&translator);
    Geometry *g = new Geometry();
    g->show();
    return app.exec();
}

运行效果图