31.QT坐标系

• dialog.h

   #ifndef DIALOG_H
   #define DIALOG_H
  
   #include <QDialog>
   #include <QLabel>
   #include <QGridLayout>
   #include <QMouseEvent>
   #include <QEvent>
  
   namespace Ui {
   class Dialog;
   }
  
   class Dialog : public QDialog
   {
       Q_OBJECT
  
   public:
       explicit Dialog(QWidget *parent = );
       ~Dialog();
  
   private:
       Ui::Dialog *ui;
  
  25     void moveEvent(QMoveEvent *event);
  26     void resizeEvent(QResizeEvent *event);
  27
  28 public:
  29     void show1();
   };
  
   #endif // DIALOG_H

• dialog.cpp

   #include "dialog.h"
   #include "ui_dialog.h"
   #include <QDebug>
  
   Dialog::Dialog(QWidget *parent) :
       QDialog(parent),
       ui(new Ui::Dialog)
   {
       ui->setupUi(this);
   }
  
   Dialog::~Dialog()
   {
       delete ui;
   }
  
   void Dialog::moveEvent(QMoveEvent *event)
   {
       qDebug() << ""<<endl;
       show1();
   }
  
   void Dialog::resizeEvent(QResizeEvent *event)
   {
       qDebug() << ""<<endl;
       show1();
   }
  
   void Dialog::show1()
   {
       QString infoall;
       QString x;
  33     x.sprintf("x()=%d",this->x());
       infoall = infoall +x + "\r\n";
  
       QString y;
  37     y.sprintf("y()=%d",this->y());
       infoall = infoall +y + "\r\n";
  
       QString width;
  41     width.sprintf("width=%d",this->width());
       infoall = infoall +width + "\r\n";
  
       QString height;
  45     height.sprintf("height=%d",this->height());
       infoall = infoall +height + "\r\n";
       ui->textEdit->setText(infoall);
   }