1、linux下安装Qt4请参考如下博文:
2、Qt4工程的创建请参考如下博文:
3、可扩展对话框
通过纯代码的形式,建立工程。点击【Detail】按钮,显示扩展对话框
包括四部分:
工程文件:ExtensionDlg.pro
主程序文件:main.cpp
对话框类:ExtensionDlg.h
实现文件:ExtensionDlg.cpp
4、实例运行效果:
5、代码区:
main()函数
#include <QApplication>
#include "ExtensionDlg.h" int main(int argc, char* argv[])
{
QApplication app(argc, argv);
ExtensionDlg exDlg;
exDlg.show();
return app.exec();
}
ExtensionDlg.h文件
#ifndef EXTENSIONDLG_H
#define EXTENSIONDLG_H
#include <QtGui> class ExtensionDlg:public QDialog
{
Q_OBJECT //加入Q——OBJECT宏,程序中用到信号/槽等Qt核心机制的,都需要加入此宏
public:
ExtensionDlg(); //构造函数
void initBasicInfo(); //初始化基础信息
void initDetailInfo(); //初始化扩展信息
public slots: //声明共有槽
void slot2Extension(); //单击Detail按钮是被触发
private:
QWidget* baseWidget; //伸缩前对话框窗体,必须为指针
QWidget* detailWidget; //扩展后对话框窗体,必须为指针
}; #endif // EXTENSIONDLG_H
ExtensionDlg.cpp文件
#include "ExtensionDlg.h" ExtensionDlg::ExtensionDlg()
{
setWindowTitle(tr("Extension Dialog")); //显示标题
initBasicInfo(); //初始化基本信息窗体
initDetailInfo(); //初始化扩展信息窗体 QVBoxLayout* layout = new QVBoxLayout; //定义一个垂直布局类实体,QHBoxLayout为水平布局类实体
layout->addWidget(baseWidget); //加入baseWidget
layout->addWidget(detailWidget); //加入DetailWidget
layout->setSizeConstraint(QLayout::SetFixedSize); //设置窗体缩放模式,此处设置为固定大小
layout->setSpacing(6); //窗口部件之间间隔大小
setLayout(layout); //加载到窗体上
} void ExtensionDlg::initBasicInfo()
{
baseWidget = new QWidget; //实例化baseWidget
QLabel* nameLabel = new QLabel(tr("Name")); //定义窗体部件
QLineEdit* nameEdit = new QLineEdit;
QLabel* sexLabel = new QLabel(tr("Sex"));
QComboBox* sexComboBox = new QComboBox; sexComboBox->addItem(tr("male"));
sexComboBox->addItem(tr("female")); QPushButton* okButton = new QPushButton(tr("OK"));
QPushButton* detailButton = new QPushButton(tr("Detail")); connect(detailButton, SIGNAL(clicked()), this, SLOT(slot2Extension())); //使用信号/槽机制 QDialogButtonBox* btnBox = new QDialogButtonBox(Qt::Horizontal); //QDialogButtonBox使用方法
btnBox->addButton(okButton, QDialogButtonBox::ActionRole);
btnBox->addButton(detailButton, QDialogButtonBox::ActionRole); QFormLayout* formLayout = new QFormLayout; //表单布局方法
formLayout->addRow(nameLabel, nameEdit);
formLayout->addRow(sexLabel, sexComboBox); QVBoxLayout* vboxLayout = new QVBoxLayout; //窗体顶级布局,布局本身也是一种窗口部件
vboxLayout->addLayout(formLayout); //顶层窗体加入表单
vboxLayout->addWidget(btnBox); //顶层窗体加入按钮
baseWidget->setLayout(vboxLayout); //加载到窗体上
} void ExtensionDlg::initDetailInfo()
{
detailWidget = new QWidget;
QLabel* ageLabel = new QLabel(tr("Age"));
QLineEdit* ageEdit = new QLineEdit;
ageEdit->setText(tr("25"));
QLabel* deptLabel = new QLabel(tr("Department"));
QComboBox* deptComboBox = new QComboBox; deptComboBox->addItem(tr("department 1"));
deptComboBox->addItem(tr("department 2"));
deptComboBox->addItem(tr("department 3"));
deptComboBox->addItem(tr("department 4")); QLabel* addressLabel = new QLabel(tr("Address"));
QLineEdit* addressEdit = new QLineEdit;
QFormLayout* formLayout = new QFormLayout;
formLayout->addRow(ageLabel, ageEdit);
formLayout->addRow(deptLabel, deptComboBox);
formLayout->addRow(addressLabel, addressEdit); detailWidget->setLayout(formLayout);
detailWidget->hide(); //将扩展信息窗口隐藏,hide()是Qt默认槽函数之一
} void ExtensionDlg::slot2Extension()
{
if(detailWidget->isHidden()) //ishidden()函数判断扩展窗口显隐状态
detailWidget->show();
else
detailWidget->hide();
}
ExtensionDlg.pro文件
TEMPLATE = app
TARGET =
DEPENDPATH +=
INCLUDEPATH +=
# Input
HEADERS += \
ExtensionDlg.h SOURCES += \
ExtensionDlg.cpp \
main.cpp