Solved Mouse click for latest Qt and VC++ problem....

[Tamis2018]

It is very simple application, and there is only mouse, which when clicked should generate Qdebug message ""test". However, there is a problem. On Visual studio I can not generate subroutine 0n_button_clicked() as it is on non MSVC++ environment.
I have followed the advice from discussion forum to go to QTdesigner that to Signal/Slots editor. Unfortunately I could not find my class and clickConfigure(). What I have done wrong?

Why commented:
connect(ui->buttonConfigure, SIGNAL(mouseDoubleClickEvent), this, SLOT(clickConfigure)); also does not work, which complains about ui "Severity Code Description Project File Line Suppression State
Error C2819 type 'Ui::acatest2Class' does not have an overloaded member 'operator ->' acatest2 e:\jpegsoft\acatest2\acactest2\acatest2.cpp 8
"

Here is excerp from my very simple code:

#pragma once
#include <QtWidgets/QMainWindow>
#include "ui_acactest2.h"

class acatest2 : public QMainWindow
{
Q_OBJECT

public:
acactest2(QWidget *parent = Q_NULLPTR);

private slots:

void clickConfigure();

private:
Ui::acactest2Class ui;
};

and cpp file...
#include "acactest2.h"
#include <Qdebug>

acactest2::acactest2(QWidget *parent)
: QMainWindow(parent)
{
ui.setupUi(this);
//connect(ui->buttonConfigure, SIGNAL(mouseDoubleClickEvent), this, SLOT(clickConfigure));
}

void acactest2::clickConfigure()
{
qDebug() << "test";
}

What is problem with that? Why I did not have any problem on Linux?

[SGaist]

Hi,

mouseDoubleClickEvent is not a signal so what you are doing is wrong.

If you want to send a signal from it, then re-implement that function in your subclass.

[Tamis2018]

1.Well, I want to have on mainwindow only pushbutton for testing. I dragged it there. However, I could not get after:
ui->setUi(this) (that is done for me)

this:
ui->pushbutton->settext('' Test'') just right after ui could not get available options to choose.
2. When I right click on pushbutton I could not get option 'go slot'? and from there just like on tutorials . From there select signal clicked from qAbstractButton.

3. //connect(ui->buttonConfigure, SIGNAL(mouseDoubleClickEvent), this, SLOT(clickConfigure));
   I have tried to put it myself and that is what I was able to choose from. Probably garbage…

[JKSH]

@Tamis2018 said in Mouse Click for Latest QT and VC++ problem....:

Why commented:
connect(ui->buttonConfigure, SIGNAL(mouseDoubleClickEvent), this, SLOT(clickConfigure)); also does not work, which complains about ui "Severity Code Description Project File Line Suppression State
Error C2819 type 'Ui::acatest2Class' does not have an overloaded member 'operator ->' acatest2 e:\jpegsoft\acatest2\acactest2\acatest2.cpp 8
"

Because in your code, ui is not a pointer.

acactest2::acactest2(QWidget *parent)
: QMainWindow(parent)
{
    ui.setupUi(this);
    //connect(ui->buttonConfigure, SIGNAL(mouseDoubleClickEvent), this, SLOT(clickConfigure));
}

• Line 1 has ui.
• Line 2 has ui->

Which one are you using? . or -> ?

[Tamis2018]

Well, I did change to be as pointer. The problems boils down to this:

#include <QtWidgets/QMainWindow>
#include "ui_acactest2.h"

class acatest2 : public QMainWindow
{
Q_OBJECT
public:
acactest2(QWidget *parent = Q_NULLPTR);
public slots:
void clickConfigure();
private:
Ui::acatest2Class *ui;
};

Why I am not having clickConfigure() as option to choose as slot as it is shown in image included?

[Tamis2018]

@JKSH said in Mouse Click for Latest QT and VC++ problem....:

Which one are you using? . or -> ?

I was desperate and try both with same results.

[J.Hilk]

@Tamis2018
you should read up on your c++,

• Address-of operator (&)
• Dereference operator (*)
  and
• Arrow-Operator (->) aka Dereference of an Address-of Operator: foo->bar = (*foo).bar

[Tamis2018]

@J.Hilk

I know that...

The problem is that I can do that like:
https://wiki.qt.io/How_to_Use_QPushButton
or when I put this:
private slots:
void handleButton();
private:
QPushButton *m_button;

and this:

m_button = new QPushButton("My Button", this);
// set size and location of the button
m_button->setGeometry(QRect(QPoint(100, 100),
QSize(200, 50)));

// Connect button signal to appropriate slot
connect(m_button, SIGNAL (released()), this, SLOT (handleButton()));

}

void MainWindow::handleButton()
{
// change the text
m_button->setText("Example");
// resize button
m_button->resize(100,100);
}
(I could not see that button in QDesigner, but it creates button in run state)

And that works! But other way around is described.

[JKSH]

You say you were able to do it in Linux.

@Tamis2018 said in Mouse click for latest Qt and VC++ problem....:

Why I did not have any problem on Linux?

It is not working on Windows because you did something differently.

You should do this:

1. Start a new project in Linux and try to make it work again.
2. Repeat this process in Windows. (Make sure you do everything the same way. Everything!)

[Tamis2018]

@JKSH

Yes, I had to reinstalled QT on Visual C++. Works OK...
THANKS!!!