qt对话框功能介绍

1、颜色对话框

	//方式一QColor color = QColorDialog::getColor(Qt::red, this, QString::fromLocal8Bit("颜色对话框"),QColorDialog::ShowAlphaChannel);qDebug() <<"color:" <<color;//方式二QColorDialog dialog(Qt::red, this); // 创建对象dialog.setOption(QColorDialog::ShowAlphaChannel);   // 显示 alpha 选项dialog.exec();  // 以模态方式运行对话框QColor color = dialog.currentColor();   // 获取颜色对话框当前颜色qDebug() << "color:" << color;    // 输出颜色信息

2、文件对话框

	//注意：(* png * jpg)中间有空格QString fileName = QFileDialog::getOpenFileName(this, QString::fromLocal8Bit("文件对话框"), "C:", QString::fromLocal8Bit("图片文件(* png * jpg);;文本文件(* txt)"));qDebug() << "fileName:" << fileName;QStringList fileNames = QFileDialog::getOpenFileNames(this, QString::fromLocal8Bit("文件对话框"), "C:", QString::fromLocal8Bit("图片文件(* png * jpg);;文本文件(* txt)"));qDebug() << "fileNames:" << fileNames;QString saveFileName = QFileDialog::getSaveFileName(this, QString::fromLocal8Bit("Save File"), QString::fromLocal8Bit("Images (*.png *.xpm *.jpg)"));qDebug() << "saveFileName:" << saveFileName;QString dir = QFileDialog::getExistingDirectory(this, QString::fromLocal8Bit("Open Directory"), "C:", QFileDialog::ShowDirsOnly | QFileDialog::DontResolveSymlinks);qDebug() << "dir:" << dir;

3、字体对话框

	bool ok;QFont font = QFontDialog::getFont(&ok, this);// 如果单击 Cancel 按钮，那么更改字体if (ok)ui.pushButton_font->setFont(font);elseqDebug() << QString::fromLocal8Bit("没有选择字体！");

4、输入对话框

	bool ok;// 获取字符串QString string = QInputDialog::getText(this, QString::fromLocal8Bit("输入字符串对话框"), QString::fromLocal8Bit("请输入用户名："), QLineEdit::Normal, QString::fromLocal8Bit("admin"), &ok);if (ok)qDebug() << "string:" << string;// 获取整数int value1 = QInputDialog::getInt(this, QString::fromLocal8Bit("输入整数对话框"), QString::fromLocal8Bit("请输入 -1000到1000之间的数值"), 100, -1000, 1000, 10, &ok);if (ok)qDebug() << "value1:" << value1;// 获取浮点数double value2 = QInputDialog::getDouble(this, QString::fromLocal8Bit("输入浮点数对话框"), QString::fromLocal8Bit("请输入-1000到1000之间的数值"), 0.00, -1000, 1000, 2, &ok);if (ok) qDebug() << "value2:" << value2;// 获取条目const QStringList items = { "aa", "bb" };QString item = QInputDialog::getItem(this, QString::fromLocal8Bit("输入条目对话框"), QString::fromLocal8Bit("请选择或输入一个条目"), items, 0, true, &ok);if (ok) qDebug() << "item:" << item;

5、消息对话框

	// 问题对话框int ret1 = QMessageBox::question(this, QString::fromLocal8Bit("问题对话框"), QString::fromLocal8Bit("问题对话框"), QMessageBox::Yes, QMessageBox::No);if (ret1 == QMessageBox::Yes)qDebug() << QString::fromLocal8Bit("问题！");// 提示对话框int ret2 = QMessageBox::information(this, QString::fromLocal8Bit("提示对话框"), QString::fromLocal8Bit("提示对话框"), QMessageBox::Ok);if (ret2 == QMessageBox::Ok)qDebug() << QString::fromLocal8Bit("提示！");// 警告对话框int ret3 = QMessageBox::warning(this, QString::fromLocal8Bit("警告对话框"), QString::fromLocal8Bit("警告对话框"), QMessageBox::Abort);if (ret3 == QMessageBox::Abort)qDebug() << QString::fromLocal8Bit("警告！");// 错误对话框int ret4 = QMessageBox::critical(this, QString::fromLocal8Bit("严重错误对话框"), QString::fromLocal8Bit("严重错误对话框"), QMessageBox::YesAll);if (ret4 == QMessageBox::YesAll)qDebug() << QString::fromLocal8Bit("错误");// 关于对话框QMessageBox::about(this, QString::fromLocal8Bit("关于对话框"), QString::fromLocal8Bit("关于对话框"));

6、进度对话框

	QProgressDialog dialog(QString::fromLocal8Bit("文件进度"), QString::fromLocal8Bit("取消"), 0, 50000, this);dialog.setWindowTitle(QString::fromLocal8Bit("进度对话框"));dialog.setWindowModality(Qt::WindowModal);  // 将对话框设置为模态dialog.show();for (int i = 0; i < 50000; i++){dialog.setValue(i);QCoreApplication::processEvents();// 避免界面冻结if (dialog.wasCanceled()) // 按下取消按钮则中断break;}dialog.setValue(50000);qDebug() << QString::fromLocal8Bit("结束！");

7、错误信息对话框

	QErrorMessage *errordlg = new QErrorMessage(this);;errordlg->setWindowTitle(QString::fromLocal8Bit("错误信息对话框"));errordlg->showMessage(QString::fromLocal8Bit("这里是出错信息！"));

8、向导对话框

QWizardPage * createPage1()  // 向导页面1
{QWizardPage *page = new QWizardPage;page->setTitle(QString::fromLocal8Bit("介绍"));return page;
}QWizardPage * createPage2()  // 向导页面2
{QWizardPage *page = new QWizardPage;page->setTitle(QString::fromLocal8Bit("用户选择信息"));return page;
}QWizardPage * createPage3()  // 向导页面3
{QWizardPage *page = new QWizardPage;page->setTitle(QString::fromLocal8Bit("结束"));return page;
}
void Dialogs::slotBtnWizard()
{QWizard wizard(this);wizard.setWindowTitle(QString::fromLocal8Bit("向导对话框"));wizard.addPage(createPage1());     // 添加向导页面wizard.addPage(createPage2());wizard.addPage(createPage3());wizard.exec();
}