程序启动时去掉dos窗口
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| #pragma comment(linker, "/subsystem:windows /entry:mainCRTStartup") |
#pragma comment(linker, "/subsystem:windows /entry:mainCRTStartup")
DoModal
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| DlgTst dlg(this);
int result = dlg.exec();
if (QDialog::Accepted == result)
QMessageBox::information(this, "title", "done."); |
DlgTst dlg(this);
int result = dlg.exec();
if (QDialog::Accepted == result)
QMessageBox::information(this, "title", "done.");
Modelless
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| DlgTst* dlg2 = new DlgTst(this);
// dlg2->setModal(Qt::ApplicationModal);
dlg2->show(); |
DlgTst* dlg2 = new DlgTst(this);
// dlg2->setModal(Qt::ApplicationModal);
dlg2->show();
嵌入子对话框
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| setWindowFlags(Qt::CustomizeWindowHint | Qt::FramelessWindowHint); |
setWindowFlags(Qt::CustomizeWindowHint | Qt::FramelessWindowHint);
保持对话框前置,类似于MFC的SetOwner
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| setWindowFlags(Qt::Dialog); |
setWindowFlags(Qt::Dialog);
PostMessage
signal slot connect的默认行为类似于SendMessage,如果要实现PostMessage的行为,connect时加参数Qt::QueuedConnection。
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| class MainWindow : public QMainWindow
{
...
private slots:
void on_pushButton_clicked();
void on_pushButton_2_clicked();
signals:
void mySignal1();
};
MainWindow::MainWindow(QWidget* parent)
{
...
connect(this, SIGNAL(mySignal1()), SLOT(on_pushButton_2_clicked()), Qt::QueuedConnection);
}
void MainWindow::on_pushButton_clicked()
{
QMessageBox::information(this, "title", "on_pushButton_clicked 1");
emit mySignal1();
QMessageBox::information(this, "title", "on_pushButton_clicked 2");
}
void MainWindow::on_pushButton_2_clicked()
{
QMessageBox::information(this, "title", "B");
} |
class MainWindow : public QMainWindow
{
...
private slots:
void on_pushButton_clicked();
void on_pushButton_2_clicked();
signals:
void mySignal1();
};
MainWindow::MainWindow(QWidget* parent)
{
...
connect(this, SIGNAL(mySignal1()), SLOT(on_pushButton_2_clicked()), Qt::QueuedConnection);
}
void MainWindow::on_pushButton_clicked()
{
QMessageBox::information(this, "title", "on_pushButton_clicked 1");
emit mySignal1();
QMessageBox::information(this, "title", "on_pushButton_clicked 2");
}
void MainWindow::on_pushButton_2_clicked()
{
QMessageBox::information(this, "title", "B");
}
安装完qt-vs-tools-msvc2013-2.0.0.vsix后,重启vs2013,工程项目右键菜单上qt功能选项为灰色无效,怎么办?
打开.vcxproj修改
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| <Keyword>Win32Proj</Keyword> |
<Keyword>Win32Proj</Keyword>
为
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| <Keyword>Qt4VSv1.0</Keyword> |
<Keyword>Qt4VSv1.0</Keyword>
再重启vs,在工程上右键菜单上点击“Convert Project to Qt VS Tools Project”。
生成要翻译的语言文件
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| lupdate hello.pro -ts lang.ts
# or in cmake
add_custom_target(tr COMMAND ${Qt5_LUPDATE_EXECUTABLE} -target-language en ${Srcs} -ts "${CMAKE_CURRENT_SOURCE_DIR}/lang.ts")
lrelease lang.ts -qm lang.qm |
lupdate hello.pro -ts lang.ts
# or in cmake
add_custom_target(tr COMMAND ${Qt5_LUPDATE_EXECUTABLE} -target-language en ${Srcs} -ts "${CMAKE_CURRENT_SOURCE_DIR}/lang.ts")
lrelease lang.ts -qm lang.qm
窗口上画矩形
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| void DlgTst01::paintEvent(QPaintEvent *e)
{
QPainter painter(this);
painter.setBrush(Qt::red);
painter.setPen(Qt::red);
painter.drawRect(QRect(0, 0, this->width(), this->height()));
} |
void DlgTst01::paintEvent(QPaintEvent *e)
{
QPainter painter(this);
painter.setBrush(Qt::red);
painter.setPen(Qt::red);
painter.drawRect(QRect(0, 0, this->width(), this->height()));
}
支持c++20
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| # CMakeLists.txt
set(CMAKE_CXX_STANDARD 20) |
# CMakeLists.txt
set(CMAKE_CXX_STANDARD 20)
禁止背景重绘
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| ui->widgetVideo->setUpdatesEnabled(false); |
ui->widgetVideo->setUpdatesEnabled(false);
皮肤skin
https://blog.csdn.net/weixin_42126427
http://t.zoukankan.com/luoxiang-p-13528745.html
无边框窗体的拖动和改变大小
https://www.cnblogs.com/warmlight/p/12841968.html
https://blog.csdn.net/zhushentian/article/details/82021838
Qt Style Sheets Reference
export QT_DEBUG_PLUGINS=1
refer to:
https://blog.csdn.net/qq_24127015/article/details/95118124
https://blog.csdn.net/zyx4843/article/details/50682212
https://blog.csdn.net/ermzdy2/article/details/99692954
https://blog.csdn.net/aaa123524457/article/details/80582978
http://www.myexception.cn/qt/1119616.html
https://blog.csdn.net/hl1hl/article/details/85244451
https://stackoverflow.com/questions/48187569/qt-translation-file-is-removed-on-make-clean-using-cmake