How can QAction ask for input when triggered? - c++

Question

I am trying to have a little OpenGL drawing application which needs files. I need to open a file using the menu bar. What I want is, when a user triggers the action, there is a little popup window that allows the user to enter the input.
Is is possible to do so using Qt? If yes, how?
glmainwindow.cpp
#include "glmainwindow.h"
#include <QGroupBox>
#include <QMenuBar>
glMainWindow::glMainWindow(fileReader reader, QWidget *parent) : QMainWindow(parent)
{
// initialization(reader);
QGroupBox *box = new QGroupBox(this);
mainLayout = new QGridLayout();
glWidget = new mainWidget(reader.p1, reader.p2);
mainLayout->addWidget(glWidget, 0, 0); //glWindow, 0, 0); //instance, 0, 0); //glWindow, 0, 0); //game, 1, 0); //simpleTex, 0, 0); //cubeTextureWindow, 0, 0);
/* Above FOR simpleGame */
userInput = new QLineEdit;
mainLayout->addWidget(userInput, 1, 0);
box->setLayout(mainLayout);
setCentralWidget(box);
setGeometry(150, 200, 720, 740);
createActions();
createMenus();
}
void glMainWindow::createMenus()
{
glMenuBar = menuBar();
fileMenu = new QMenu("File", this);
fileMenu->addAction(openFileAction);
fileMenu->addAction(closeAction);
glMenuBar->addMenu(fileMenu);
}
void glMainWindow::createActions()
{
openFileAction = new QAction(tr("Open file"), this);
// connect(openFileAction, &QAction::triggered)
closeAction = new QAction("Exit", this);
connect(closeAction, &QAction::triggered, glWidget, &QWidget::close);
}
glMainWindow.h
#ifndef GLMAINWINDOW_H
#define GLMAINWINDOW_H
#include <QPushButton>
#include <QLabel>
#include <QMainWindow>
#include <QGridLayout>
#include <QSlider>
#include <QLineEdit>
#include <QAction>
#include "../roadsFileRead/filereader.h"
#include "mainwidget.h"
class glMainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit glMainWindow(fileReader reader, QWidget *parent = nullptr);
private:
void createMenus();
void createActions();
private:
QGridLayout *mainLayout;
mainWidget *glWidget{nullptr};
QSlider* xSlider;
QSlider* ySlider;
QSlider* zSlider;
QLineEdit *userInput;
QMenuBar *glMenuBar;
QMenu *fileMenu;
QAction *closeAction{nullptr};
QAction *openFileAction{nullptr};
};
#endif // GLMAINWINDOW_H
I have tried searching online and similar stackoverflow questions, but to no avail. However, I have seen some applications do this. I found similar tutorials, but they didn't have anything that's like what I want. How can I connect this to the triggering of the action? Also, I am not using Qt Designer.

Answer 1

you are almost there... just add a QfileDialog as suggested in the comments..
void glMainWindow::createActions()
{
//define the object for the file name:
QString fileName = "";
openFileAction = new QAction(tr("Open file"), this);
connect(openFileAction, &QAction::triggered, []()
{
fileName = QFileDialog::getOpenFileName(this,
tr("Open the file"), "/home/user/path", tr("my Files (*.txt *.csv)"));
});
....
}

Answer 2

So I got my own way. I used QInputDialog NOT QFileDialog, as QFileDialog doesn't help and is confusing. I added this to glmainwindow.h:
void openFileAct()
{
QString filePath = QInputDialog::getText(0, "File path",
"FIle path", QLineEdit::Normal,
"");
openFile(filePath.toStdString());
}
where openFile is the function that opens the file. I connected the action to openFileAct.