QGroupBox在界面布局中的使用方法.docx

此例程主要展示用代码方式创建控件并用Layout管理类对其进行布局；
例程来自Qt5.2，如过是默认安装，代码位于：C:\Qt\Qt5.2.0\5.2.0\mingw48_32\examples\widgets\layouts\basiclayouts
涉及类：QDialogQPushbottonQGroupBoxQLabelQLineEditQComboBoxQTextEditQHBoxLayoutQVBoxLayoutQFormLayoutQGridLayoutQMenuQMenuBar

main.cpp
#include<QApplication>
#include"dialog.h"

intmain(intargc,char*argv[])
{
QApplicationapp(argc,argv);
Dialogdialog;
dialog.show();

returnapp.exec();
}

dialog.h
#ifndefDIALOG_H
#defineDIALOG_H

#include<QDialog>

classQAction;
classQDialogButtonBox;
classQGroupBox;
classQLabel;
classQLineEdit;
classQMenu;
classQMenuBar;
classQPushButton;
classQTextEdit;

classDialog:publicQDialog
{
Q_OBJECT

public:
Dialog();

private:
voidcreateMenu();
voidcreateHorizontalGroupBox();
voidcreateGridGroupBox();
voidcreateFormGroupBox();

enum{NumGridRows=3,NumButtons=4};

QMenuBar*menuBar;
QGroupBox*horizontalGroupBox;
QGroupBox*gridGroupBox;
QGroupBox*formGroupBox;
QTextEdit*smallEditor;
QTextEdit*bigEditor;
QLabel*labels[NumGridRows];
QLineEdit*lineEdits[NumGridRows];
QPushButton*buttons[NumButtons];
QDialogButtonBox*buttonBox;

QMenu*fileMenu;
QAction*exitAction;
};

#endif//DIALOG_H

dialog.cpp
#include<QtWidgets>

#include"dialog.h"

Dialog::Dialog()
{
createMenu();//创键菜单
createHorizontalGroupBox();//创建第一组控件
createGridGroupBox();//创建第二组控件
createFormGroupBox();//创建第三组控件

bigEditor=newQTextEdit;//创建一个独立的文本编辑框
bigEditor->setPlainText(tr("Thiswidgettakesupalltheremainingspace"
"inthetop-levellayout."));

//创建对话框按钮组
buttonBox=newQDialogButtonBox(QDialogButtonBox::Ok
|QDialogButtonBox::Cancel);

connect(buttonBox,SIGNAL(accepted()),this,SLOT(accept()));//连接按钮信号
connect(buttonBox,SIGNAL(rejected()),this,SLOT(reject()));

QVBoxLayout*mainLayout=newQVBoxLayout;//创建垂直布局对象
mainLayout->setMenuBar(menuBar);//加入菜单栏
mainLayout->addWidget(horizontalGroupBox);//加入第一组控件
mainLayout->addWidget(gridGroupBox);//加入第二组控件
mainLayout->addWidget(formGroupBox);//加入第三组控件
mainLayout->addWidget(bigEditor);//加入文本编辑框
mainLayout->addWidget(buttonBox);//加