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:QtQt5.2.05.2.0mingw48_32exampleswidgetslayoutsbasiclayouts涉及类：QDialog QPushbotton QGroupBox QLabel QLineEdit QComboBox QTextEdit QHBoxLayout QVBoxLayout QFormLayout QGridLayout QMenu QMenuBarmain.cpp#include #include dialog.hint main(int argc, char *argv) QApplication app(argc, argv); Dialog dialog; dialog.show(); return app.exec();dialog.h#ifndef DIALOG_H#define DIALOG_H#include class QAction;class QDialogButtonBox;class QGroupBox;class QLabel;class QLineEdit;class QMenu;class QMenuBar;class QPushButton;class QTextEdit;class Dialog : public QDialog Q_OBJECTpublic: Dialog();private: void createMenu(); void createHorizontalGroupBox(); void createGridGroupBox(); void createFormGroupBox(); enum NumGridRows = 3, NumButtons = 4 ; QMenuBar *menuBar; QGroupBox *horizontalGroupBox; QGroupBox *gridGroupBox; QGroupBox *formGroupBox; QTextEdit *smallEditor; QTextEdit *bigEditor; QLabel *labelsNumGridRows; QLineEdit *lineEditsNumGridRows; QPushButton *buttonsNumButtons; QDialogButtonBox *buttonBox; QMenu *fileMenu; QAction *exitAction;#endif / DIALOG_Hdialog.cpp#include #include dialog.hDialog: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 = new QTextEdit; /创建一个独立的文本编辑框 bigEditor-setPlainText(tr(This widget takes up all the remaining space in the top-level layout.); /创建对话框按钮组 buttonBox = new QDialogButtonBox(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 = new QVBoxLayout; /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); /加入按钮 setLayout(mainLayout); /布局加入app对象 setWindowTitle(tr(Basic Layouts); /设置窗口标题/创建菜单栏void Dialog:createMenu() menuBar = new QMenuBar; /Dialog类没有菜单栏，所以创建一个 fileMenu = new QMenu(tr(&File), this); /创建一个菜单 exitAction = fileMenu-addAction(tr(E&xit);/添加一个菜单选项 menuBar-addMenu(fileMenu); /菜单加入菜单栏里 connect(exitAction, SIGNAL(triggered(), this, SLOT(accept();/连接菜单信号/加入第一组控件void Dialog:createHorizontalGroupBox() horizontalGroupBox = new QGroupBox(tr(Horizontal layout); /创建组控件 QHBoxLayout *layout = new QHBoxLayout; /创建水平布局对象 for (int i = 0; i addWidget(buttonsi); /加入布局 horizontalGroupBox-setLayout(layout); /将布局好的按钮添加套组控件里/加入第二组控件void Dialog:createGridGroupBox() gridGroupBox = new QGroupBox(tr(Grid layout); /创建组控件 QGridLayout *layout = new QGridLayout; /创建网格布局对象 for (int i = 0; i addWidget(labelsi, i + 1, 0); /将建标签控件放在i+1行，0列位置 layout-addWidget(lineEditsi, i + 1, 1); /将建标编辑框控件放在i+1行，1列位置 smallEditor = new QTextEdit; /创建一个文本编辑控件 smallEditor-setPlainText(tr(This widget takes up about two thirds of the grid layout.); layout-addWidget(smallEditor, 0, 2, 4, 1); /将文本编辑控件放在0行，2列位置，行跨度为4行，列跨读为1列 layout-setColumnStretch(1, 10);/将第1列的控件(行编辑框控件)拉伸系数为10 layout-setColumnStretch(2, 20);/将第2列的控件(文本编辑控件)拉伸系数为20 gridGroupBox-setLayout(layout);/加入第三组控件void Dialog:createFormGroupBox() formGroupBox = new QGroupBox(tr(Form layout);/创建组控件 QFormLayout *layout = new QFormLayout; /创建表格式布局对象 layout-addRow(new QLabel(tr(Line 1:), new QLineEdit); /添加第一个标签和行编