Qt学习之内建对话框
//main.cpp
#include <QApplication>
#include <QTranslator>
#include <QProcess>
#include <QLocale>
#include <QLibraryInfo>
#include <QDebug>
#include <QtGui/QtGui>
#include"mybuiltindlg.h"
int main(int argc,char* argv[])
{
QApplication app(argc, argv);
QTextCodec::setCodecForTr(QTextCodec::codecForName("gb18030"));
MyBuiltinDlg mydialog;
QMessageBox box;
QTranslator translator;
{
QStringList environment = QProcess::systemEnvironment();
QString str;
bool bFinded =false;
foreach(str,environment)
{
if(str.startsWith("QTDIR="))
{
bFinded =true;
break;
}
}
if(bFinded)
{
str=str.mid(6);
bFinded =translator.load("qt_"+QLocale::system().name(),
str.append("/translations"));
if(bFinded)
qApp->installTranslator(&translator);
else
{
// qDebug() << QObject::trUtf8("没有中文");
box.setWindowTitle("warning");
box.setIcon(QMessageBox::Warning);
box.setText("没有支持中文的国际化翻译软件！！");
box.setStandardButtons(QMessageBox::Yes);
box.exec();
}
}
else
{
//qDebug() << QObject::trUtf8("必须设置");
box.setWindowTitle("warning");
box.setIcon(QMessageBox::Warning);
box.setText("必须设置QTDIR环境变量！！");
box.setStandardButtons(QMessageBox::Yes);
box.exec();
exit(1);
}
}
return mydialog.exec();
}
//mybuiltin.h
#ifndef CBUILTINDLG_H
#define CBUILTINDLG_H
#include <QDialog>
class QTextEdit;
class QPushButton;
class MyBuiltinDlg : public QDialog
{
Q_OBJECT
public:
explicit MyBuiltinDlg(QWidget *parent = 0);
virtual ~MyBuiltinDlg(){}
signals:
public slots:
void doPushBtn();
private:
QTextEdit* displayTextEdit;
QPushButton* colorPushBtn;
QPushButton* errorPushBtn;
QPushButton* filePushBtn;
QPushButton* fontPushBtn;
QPushButton* inputPushBtn;
QPushButton* pagePushBtn;
QPushButton* progressPushBtn;
QPushButton* printPushBtn;
};
#endif // CBUILTINDLG_H
//mybuiltin.cpp
#include "mybuiltindlg.h"
#include<QtGui/QtGui>
MyBuiltinDlg::MyBuiltinDlg(QWidget *parent) :
QDialog(parent)
{
displayTextEdit =new QTextEdit(trUtf8("Qt标准通用对话框！！"));
QGridLayout* gridLayout = new QGridLayout;
colorPushBtn = new QPushButton(trUtf8("clor"));
errorPushBtn = new QPushButton(trUtf8("error"));
filePushBtn = new QPushButton(trUtf8("file"));
fontPushBtn = new QPushButton(trUtf8("font"));
inputPushBtn = new QPushButton(trUtf8("input"));
pagePushBtn = new QPushButton(trUtf8("page"));
progressPushBtn = new QPushButton(trUtf8("progress"));
printPushBtn = new QPushButton(trUtf8("print"));
gridLayout->addWidget(colorPushBtn,0,0,1,1);
gridLayout->addWidget(errorPushBtn,0,1,1,1);
gridLayout->addWidget(filePushBtn,0,2,1,1);
gridLayout->addWidget(fontPushBtn,1,0,1,1);
gridLayout->addWidget(inputPushBtn,1,1,1,1);
gridLayout->addWidget(pagePushBtn,1,2,1,1);
gridLayout->addWidget(progressPushBtn,2,0,1,1);
gridLayout->addWidget(printPushBtn,2,1,1,1);
gridLayout->addWidget(displayTextEdit,3,0,3,3);
setLayout(gridLayout);
connect(colorPushBtn,SIGNAL(clicked()),this,SLOT(doPushBtn()));
connect(errorPushBtn,SIGNAL(clicked()),this,SLOT(doPushBtn()));
connect(filePushBtn,SIGNAL(clicked()),this,SLOT(doPushBtn()));
connect(fontPushBtn,SIGNAL(clicked()),this,SLOT(doPushBtn()));
connect(inputPushBtn,SIGNAL(clicked()),this,SLOT(doPushBtn()));
connect(pagePushBtn,SIGNAL(clicked()),this,SLOT(doPushBtn()));
connect(progressPushBtn,SIGNAL(clicked()),this,SLOT(doPushBtn()));
connect(printPushBtn,SIGNAL(clicked()),this,SLOT(doPushBtn()));
setWindowTitle(trUtf8("内建对话框"));
resize(400,300);
}
void MyBuiltinDlg::doPushBtn()
{
/*
*槽函数的开头是获取发送信号的QPushButton对象指针。函数QObject::sender()
*返回发送信号的对象的指针，返回类型为QObject*， qobject_cast是模板函数，
*这里C++不太懂，
*/
QPushButton* btn = qobject_cast<QPushButton*>(sender());
if(btn == colorPushBtn)
{//颜色对话框
//QTextEdit::palette()获取文本编辑框对象的调色板
QPalette palette = displayTextEdit->palette();
/*
*调用QColorDialog::getColor（）函数创建并显示一个模态的颜色对话框
*并返回用户选择的颜色对象的常量引用（对临时对象的引用是无效的，必须使
*用常量引用)赋值变量color
*颜色对话框的颜色初始化为palette.color(QPalette::Base),即文本编辑
*框的背景色，父窗口部件为this
*/
const QColor& color =
QColorDialog::getColor(palette.color(QPalette::Window),this);
if(color.isValid())
{
/*
*color.isValid()判断函数是否有效
*palette.setColor有两个参数第一个参数是指定调色板的角色
×该函数会影响到所有的三个颜色组
×第二个参数是指定应该设置的颜色
*重新设置文本编辑框的调色板
*/
palette.setColor(QPalette::Base,color);
displayTextEdit->setPalette(palette);
}
}
else if(btn == errorPushBtn)
{
//错误对话框
QErrorMessage box(this);
box.setWindowTitle(trUtf8("错误消息框"));
box.showMessage(trUtf8("错误消息框实例xx"));
box.showMessage(trUtf8("错误消息框实例yy"));
box.showMessage(trUtf8("错误消息框实例zz"));
box.showMessage(trUtf8("错误消息框实例xx"));
box.showMessage(trUtf8("错误消息框实例xx"));
box.exec();
}
else if(btn ==filePushBtn)
{
//文件对话框
QString filename = QFileDialog::getOpenFileName(
this,
trUtf8("打开文件"),
"/home/pillar",
trUtf8("任何文件(*.*)"
";;文本文件(*.txt)"
";;XML文件(*.xml)"));
displayTextEdit->setText(filename);
}
else if(btn == fontPushBtn)
{
bool ok;
const QFont& font = QFontDialog::getFont(&ok,
displayTextEdit->font(),
this,
trUtf8("字体对话框"));
if(ok)
{
displayTextEdit->setFont(font);
}
}
else if(btn == inputPushBtn)
{
bool ok;
QString text = QInputDialog::getText(this,
trUtf8("输入对话框"),
trUtf8("输入文本"),
QLineEdit::Normal,
QDir::home().dirName(),
&ok);
if(ok && !text.isEmpty())
displayTextEdit->setText(text);
}
else if(btn == pagePushBtn)
{
QPrinter printer;
QPageSetupDialog dlg(&printer,this);
dlg.setWindowTitle(trUtf8("页设置对话框"));
if(dlg.exec()== QDialog::Accepted)
{
}
}
else if(btn == progressPushBtn)
{
QProgressDialog progree(trUtf8("正在复制....."),
trUtf8("cancel"),
0,
10000,this);
progree.setWindowModality(Qt::WindowModal);
progree.setWindowTitle(trUtf8("进度对话框"));
progree.show();
for(int i = 0;i < 10000;i++)
{
progree.setValue(i);
qApp->processEvents();//保证事件循环还可以处理其他事件
if(progree.wasCanceled())
break;
qDebug() << i;
}
progree.setValue(10000);
}
else if(btn == printPushBtn)
{
QPrinter printer;
QPrintDialog dlg(&printer,this);
dlg.setWindowTitle(trUtf8("打印对话框"));
if(dlg.exec() == QDialog::Accepted)
{
}
}
}
