Qt/project1/QPushButton/QLineEdit/QPlainTextEdit

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下面介绍Qt/project1/QPushButton/QLineEdit/QPlainTextEdit

1.QPushBtton类

2.QLineEdit类

3.QPlainTextEdit类

建立每一个子窗口的时候都要去指定它的父窗口。

#ifndef _MYWINDOW_H_#define _MYWINDOW_H_#include //按钮类#include   //单行编辑类#include  //无格式文本编辑类class Mywindow :public QWidget{Q_OBJECT;public:Mywindow(QWidget *parent);private:QPushButton* m_button;QLineEdit* m_lineedit;QPlainTextEdit* m_plaintextedit;};#endif

#include"Mywindow.h"Mywindow::Mywindow(QWidget *parent) :QWidget(parent){m_lineedit = new QLineEdit(this);m_lineedit->setGeometry(50, 50, 200, 40);m_button = new QPushButton(this);m_button->setText("hello,qt");m_button->setGeometry(260, 50, 220, 40);m_plaintextedit = new QPlainTextEdit(this);m_plaintextedit->setGeometry(50, 100, 430, 200);}

#include #include"Mywindow.h"int main(int argc, char *argv[]){QApplication a(argc, argv);Mywindow window(NULL);window.show();return a.exec();}

运行后效果：

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