https://wiki.linsakura.com/ 2026-04-25T04:29:42+00:00 https://wiki.linsakura.com/ https://wiki.linsakura.com/lib/tpl/haku/images/favicon.ico text/html 2024-05-10T17:34:27+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.linsakura.com/doku.php?id=wiki:dev:qt:note:connect_overload&rev=1715333667&do=diff 重载信号信号槽连接 例如QButtonGroup有两个同名不同参数的信号，用指针方式关联信号槽会有问题： Q_SIGNALS: void buttonClicked(QAbstractButton *); void buttonClicked(int); 可用继续用旧的SIGNAL()和 text/html 2022-03-18T15:36:58+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.linsakura.com/doku.php?id=wiki:dev:qt:note:eventfilter&rev=1647589018&do=diff Qt eventFilter 事件过滤器使用方法 #include "mainwindow.h" #include "ui_mainwindow.h" #include <QDebug> #include <QDragEnterEvent> #include <QMimeData> MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent) , ui(new Ui::MainWindow) { ui->setupUi(this); //ui->textBrowser->setAcceptDrops(true); ui->textBrowser->installEventFilter(this); //this->setAcceptDrops(true); } MainWindow::~MainWindow() { delete ui; } bool MainWindow::eventFilter(QObject *obj, QEvent *event) … text/html 2022-03-18T15:42:33+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.linsakura.com/doku.php?id=wiki:dev:qt:note:index&rev=1647589353&do=diff Qt 笔记索引 eventfilter 事件过滤器使用方法 计算两个时间相差的函数 Qt测试函数执行时间 text/html 2025-01-10T17:27:08+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.linsakura.com/doku.php?id=wiki:dev:qt:note:makeinfo&rev=1736501228&do=diff 编译时输出代码中的特定字符 首先创建一个sh脚本，例如保存到*.pro同目录，命名为makeinfo.sh #!/bin/bash svn=$(grep "#define SVN_VER" ./Public.h | egrep -o '\".*\"') echo "请确认SVN版本【$svn】是否正确" 然后在项目 text/html 2022-04-30T20:50:55+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.linsakura.com/doku.php?id=wiki:dev:qt:note:qdialogcolor%E4%BD%BF%E7%94%A8&rev=1651323055&do=diff QDialogColor使用 QColorDialog dialog(this); //这里使用this->goemetry().y()是因为如果使用this->y()将是不包含标题栏的y坐标，会导致setGeometry后，有可能标题栏超出屏幕外 dialog.setGeometry(this->geometry().x(), this->geometry().y(), dialog.width(), dialog.height()); dialog.setWindowTitle(tr("请设置字体颜色")); dialog.setCurrentColor(QColor(0, 0, 0)); //设置打开后的默认颜色 if(dialog.exec() == QColorDialog::Accepted) { QColor getColor = dialog.selectedColor(); //获取到的颜色 }… text/html 2022-04-30T20:46:07+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.linsakura.com/doku.php?id=wiki:dev:qt:note:qlineedit%E6%AD%A3%E5%88%99%E8%A1%A8%E8%BE%BE%E5%BC%8F%E4%BD%BF%E7%94%A8&rev=1651322767&do=diff QLineEdit正则表达式使用 //绑定 QRegExpValidator *validator = new QRegExpValidator(QRegExp("[1-9]|[1-5][0-9]|60"), this); //1~60 ui->lineEdit->setValidator(validator); //验证 ui->lineEditNoticeKeepTime->hasAcceptableInput(); //true-表示完全匹配，false-表示部分匹配或不匹配 text/html 2024-05-13T11:19:51+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.linsakura.com/doku.php?id=wiki:dev:qt:note:qss_dynamic_property&rev=1715570391&do=diff Qt QSS 动态属性 此条目的demo代码：[ QssDynamicProperty.zip] 有时候在代码中，需要根据某些情况下动态调整样式，但是有时候系统给出的属性如checked、unchecked已经不足以我们使用时，这个时候就可以用到动态属性的方式去实现我们要的效果。 text/html 2022-03-18T15:42:21+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.linsakura.com/doku.php?id=wiki:dev:qt:note:qt%E6%B5%8B%E8%AF%95%E5%87%BD%E6%95%B0%E6%89%A7%E8%A1%8C%E6%97%B6%E9%97%B4&rev=1647589341&do=diff Qt测试函数执行时间 利用gettimeofday()，其精度为us级 #include <QDebug> #include <sys/time.h> struct timeval tStart; struct timeval tEnd; float timeUse; gettimeofday(&tStart, NULL); function(); gettimeofday(&tEnd, NULL); timeUse = (1000000*(tEnd.tv_sec - tStart.tv_sec) + tEnd.tv_usec - tStart.tv_usec)/1000000.0; qDebug() << timeUse << "s"; text/html 2022-03-18T15:33:35+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.linsakura.com/doku.php?id=wiki:dev:qt:note:%E8%AE%A1%E7%AE%97%E4%B8%A4%E4%B8%AA%E6%97%B6%E9%97%B4%E7%9B%B8%E5%B7%AE%E7%9A%84%E5%87%BD%E6%95%B0&rev=1647588815&do=diff Qt 计算两个时间相差的函数 int time = mLastClickTime.msecsTo(QTime::currentTime()); if(time <= 400) { //如果在400ms内的点击，认为是双击 todo(); } mLastClickTime = QTime::currentTime();