一、概述
汇总一下Qt中的弹框：QDialog（自定义）、QMessageBox、QColorDialog、QFileDialog、QFontDialog、QProcessDialog
二、代码示例及演示效果
1.自定义弹框（啥都没有的弹框，如果想要自定义内容，直接继承QDialog进行扩展）
QDialog* dialog = new QDialog; dialog->setWindowTitle(tr("基础弹框")); dialog->show();
2.选择颜色弹框
QPalette pal = edtColor->palette(); //获取现有 palette QColor iniColor = pal.color(QPalette::Text); //现有的文字颜色 QColor color = QColorDialog::getColor(iniColor, this, "选择颜色"); qDebug() << "获取颜色"; if (color.isValid()) //选择有效 { pal.setColor(QPalette::Text, color); //palette 设置选择的颜色 edtColor->setPalette(pal); //设置 palette //edtColor->setText(color); }
3.选择文件弹框
QString curPath = QCoreApplication::applicationDirPath(); //获取应用程序的路径 QString dlgTitle = "保存文件"; //对话框标题 QString filter = "文本文件(*.txt);;h文件(*.h);;C++文件(.cpp);;所有文件(*.*)"; //文件过滤器 QString aFileName = QFileDialog::getSaveFileName(this, dlgTitle, curPath, filter); if (!aFileName.isEmpty()) edtColor->setText(aFileName);
4.字体选择弹框
QFont iniFont = edtColor->font(); //获取文本框的字体 bool ok = false; QFont font = QFontDialog::getFont(&ok, iniFont); //选择字体 if (ok) //选择有效 edtColor->setFont(font);
5.基础消息弹框
QString dlgTitle = "删除"; QString strInfo = "确定要删除吗？"; QMessageBox::StandardButton result = QMessageBox::information(this, dlgTitle, strInfo, QMessageBox::Ok, QMessageBox::No); if (result == QMessageBox::Ok) { qDebug() << "确定"; } else if (result == QMessageBox::No) { qDebug() << "取消"; }
QString dlgTitle = "警告"; QString strInfo = "刀锋来袭"; QMessageBox::warning(this, dlgTitle, strInfo);
QString dlgTitle = "恕瑞玛"; QString strInfo = "恕瑞玛，你的皇帝回来了"; QMessageBox::critical(this, dlgTitle, strInfo);
QString dlgTitle = "Tips"; QString strInfo = "德玛西亚万岁"; QMessageBox::about(this, dlgTitle, strInfo);
6.带进度条的弹框
pd = new QProgressDialog("当前进度...", "Cancel", 0, 100); pd->setWindowFlags(Qt::Dialog | Qt::CustomizeWindowHint | Qt::WindowTitleHint); //不显示进度条上的“最小化”“最大化”“关闭” pd->setWindowTitle("任务保存"); //窗口标题 pd->setAutoClose(true); //进度达到最大值时不关闭，默认为true pd->setLabelText("任务保存中..."); //显示的文本 pd->setRange(0, 100); //设置进度条的极值，默认为[0,100] //pd->setCancelButton(NULL); //不显示取消按钮 pd->show(); //进度条显示 //std::thread mThread(progressFun, this); timer->start(20);//开启timer，刷新进度条进度
创建QTimer并设置事件
timer = new QTimer(this); connect(timer, &QTimer::timeout, this, [=] { pd->setValue(steps); steps++; //终止条件 if (steps > pd->maximum()) { timer->stop(); steps = 0; }
7.以下是完整的代码
#include "DialogWindow.h" void progressFun(DialogWindow* window) { int i = 0; while (i <= 100) { std::this_thread::sleep_for(std::chrono::milliseconds(100)); i++; window->pd->setValue(i); } } void DialogWindow::getValue(int value) { qDebug() << "进度条:" << value; pd->setValue(value); } DialogWindow::DialogWindow(QWidget* parent) : QWidget(parent) { this->setWindowTitle("各种弹框"); this->setFixedSize(320, 480); QVBoxLayout* vLayout = new QVBoxLayout(this); QPushButton* btnBaseDialog = new QPushButton(this); btnBaseDialog->setFixedHeight(30); btnBaseDialog->setText("基础dialog"); QHBoxLayout* hLayoutColor = new QHBoxLayout(this); QPushButton* btnColorDialog = new QPushButton(this); btnColorDialog->setFixedHeight(30); btnColorDialog->setText("选择颜色"); edtColor = new QLineEdit(this); edtColor->resize(60, 30); hLayoutColor->addWidget(edtColor); hLayoutColor->addWidget(btnColorDialog); QPushButton* btnFileDialog = new QPushButton(this); btnFileDialog->setFixedHeight(30); btnFileDialog->setText("选择文件和目录"); QPushButton* btnFontDialog = new QPushButton(this); btnFontDialog->setFixedHeight(30); btnFontDialog->setText("选择字体"); QPushButton* btnInputDialog = new QPushButton(this); btnInputDialog->setFixedHeight(30); btnInputDialog->setText("允许用户输入一个值，并将其返回"); QHBoxLayout* hLayout2 = new QHBoxLayout(this); QPushButton* btnInfoDialog = new QPushButton(this);// btnInfoDialog->setFixedHeight(30); btnInfoDialog->setText("info"); QPushButton* btnWarnDialog = new QPushButton(this);// btnWarnDialog->setFixedHeight(30); btnWarnDialog->setText("Warn"); QPushButton* btnCriticalDialog = new QPushButton(this);// btnCriticalDialog->setFixedHeight(30); btnCriticalDialog->setText("critical"); QPushButton* btnAboutDialog = new QPushButton(this);// btnAboutDialog->setFixedHeight(30); btnAboutDialog->setText("about"); hLayout2->addWidget(btnInfoDialog); hLayout2->addWidget(btnWarnDialog); hLayout2->addWidget(btnCriticalDialog); hLayout2->addWidget(btnAboutDialog); QPushButton* btnProgressDialog = new QPushButton(this);//显示操作过程 btnProgressDialog->setFixedHeight(30); btnProgressDialog->setText("显示操作过程"); vLayout->addWidget(btnBaseDialog); vLayout->addLayout(hLayoutColor); vLayout->addWidget(btnFileDialog); vLayout->addWidget(btnFontDialog); vLayout->addWidget(btnInputDialog); vLayout->addLayout(hLayout2); vLayout->addWidget(btnProgressDialog); //vLayout->setDirection(QBoxLayout::BottomToTop); vLayout->setSpacing(10); this->setLayout(vLayout); //基础dialog connect(btnBaseDialog, &QPushButton::clicked, [=]() { QDialog* dialog = new QDialog; dialog->setWindowTitle(tr("基础弹框")); dialog->show(); }); //选择颜色 connect(btnColorDialog, &QPushButton::clicked, [=]() { QPalette pal = edtColor->palette(); //获取现有 palette QColor iniColor = pal.color(QPalette::Text); //现有的文字颜色 QColor color = QColorDialog::getColor(iniColor, this, "选择颜色"); qDebug() << "获取颜色"; if (color.isValid()) //选择有效 { pal.setColor(QPalette::Text, color); //palette 设置选择的颜色 edtColor->setPalette(pal); //设置 palette //edtColor->setText(color); } }); //选择文件或者目录 connect(btnFileDialog, &QPushButton::clicked, [=]() { QString curPath = QCoreApplication::applicationDirPath(); //获取应用程序的路径 QString dlgTitle = "保存文件"; //对话框标题 QString filter = "文本文件(*.txt);;h文件(*.h);;C++文件(.cpp);;所有文件(*.*)"; //文件过滤器 QString aFileName = QFileDialog::getSaveFileName(this, dlgTitle, curPath, filter); if (!aFileName.isEmpty()) edtColor->setText(aFileName); }); //选择字体 connect(btnFontDialog, &QPushButton::clicked, [=]() { QFont iniFont = edtColor->font(); //获取文本框的字体 bool ok = false; QFont font = QFontDialog::getFont(&ok, iniFont); //选择字体 if (ok) //选择有效 edtColor->setFont(font); }); //允许用户输入一个值，并将其值返回 connect(btnInputDialog, &QPushButton::clicked, [=]() { //输入字符串 QString dlgTitle = "输入文字对话框"; QString txtLabel = "请输入文件名"; QString defaultInput = "新建文件.txt"; QLineEdit::EchoMode echoMode = QLineEdit::Normal;//正常文字输入 //QLineEdit::EchoMode echoMode=QLineEdit::Password;//密码输入 bool ok = false; QString text = QInputDialog::getText(this, dlgTitle, txtLabel, echoMode, defaultInput, &ok); if (ok && !text.isEmpty()) edtColor->setText(text); }); //模态对话框，用于显示信息、询问问题等 connect(btnInfoDialog, &QPushButton::clicked, [=]() { QString dlgTitle = "删除"; QString strInfo = "确定要删除吗？"; QMessageBox::StandardButton result = QMessageBox::information(this, dlgTitle, strInfo, QMessageBox::Ok, QMessageBox::No); if (result == QMessageBox::Ok) { qDebug() << "确定"; } else if (result == QMessageBox::No) { qDebug() << "取消"; } }); connect(btnWarnDialog, &QPushButton::clicked, [=]() { QString dlgTitle = "警告"; QString strInfo = "刀锋来袭"; QMessageBox::warning(this, dlgTitle, strInfo); }); connect(btnCriticalDialog, &QPushButton::clicked, [=]() { QString dlgTitle = "恕瑞玛"; QString strInfo = "恕瑞玛，你的皇帝回来了"; QMessageBox::critical(this, dlgTitle, strInfo); }); connect(btnAboutDialog, &QPushButton::clicked, [=]() { QString dlgTitle = "Tips"; QString strInfo = "德玛西亚万岁"; QMessageBox::about(this, dlgTitle, strInfo); }); //显示操作过程 connect(btnProgressDialog, &QPushButton::clicked, [=]() { pd = new QProgressDialog("当前进度...", "Cancel", 0, 100); pd->setWindowFlags(Qt::Dialog | Qt::CustomizeWindowHint | Qt::WindowTitleHint); //不显示进度条上的“最小化”“最大化”“关闭” pd->setWindowTitle("任务保存"); //窗口标题 pd->setAutoClose(true); //进度达到最大值时不关闭，默认为true pd->setLabelText("任务保存中..."); //显示的文本 pd->setRange(0, 100); //设置进度条的极值，默认为[0,100] //pd->setCancelButton(NULL); //不显示取消按钮 pd->show(); //进度条显示 //std::thread mThread(progressFun, this); timer->start(20); }); timer = new QTimer(this); connect(timer, &QTimer::timeout, this, [=] { pd->setValue(steps); steps++; //终止条件 if (steps > pd->maximum()) { timer->stop(); steps = 0; } }); } DialogWindow::~DialogWindow() { }