Qt 5.14.1 on Linux,Dialog Close Card

jack reemoon

Dialog calls the close function when the button is pressed, and it will be stuck for 2 or 3 seconds, but the built-in close button in the upper right corner will not get stuck. The more controls on the form, the more stuck. What is the reason?

jsulm

@jack-reemoon said in Qt 5.14.1 on Linux,Dialog Close Card:

What is the reason?

Impossible to say based on the information you provided!

What are you doing in the destructor of your dialog?
Are any other actions triggered when this button is pressed?

You can also show relevant code to help others to help you.

jack reemoon

jack reemoon

The destructor only has the delete UI, and the button only calls this.close

jsulm

@jack-reemoon Please post code as text, not screen-shots!
Please try to debug and/or profile your app to find out where it spends so much time. From what you posted others can only guess.
What you also can do: create a small app which reproduces this issue and post the code.

jack reemoon

@jsulm
void MainWindow::on_pushButton_clicked()
{
TestDialog *test = new TestDialog ();
test->setAttribute(Qt::WA_DeleteOnClose);
test->show();
}

#include "testdialog.h"
#include "ui_testdialog.h"

TestDialog::TestDialog(QWidget *parent) :
QDialog(parent),
ui(new Ui::TestDialog)
{
ui->setupUi(this);
connect(ui->pushButton_2,&QPushButton::clicked,this,&TestDialog::pushButton_2_clicked);
}

TestDialog::~TestDialog()
{
delete ui;
}

void TestDialog::closeEvent(QCloseEvent *event)
{
event->accept();
}

void TestDialog::pushButton_2_clicked()
{
this->close();
}
Does qt have requirements for computers? Computers with high configuration will not get stuck.