[solved] directory tree and file list Beginners question

SherifOmran

When I click on loginbrowse, the browse widget opens its window. However only labels exist on the window without the listview and treeview.

Login class
@
#include "browse.h"

void Login::on_loginbrowse_clicked()
{
// selecting a new setting.dB file

Browse w("Setting.dB"); // Browse searching for Setting.dB

}
@

browse class with the listview
@
#ifndef BROWSE_H
#define BROWSE_H
#include "login.h"

#include <QWidget>
#include <QModelIndex>
#include <QFileSystemModel>
#include <QString>
#include <QListWidget>
#include <QTreeView>
#include <QPushButton>

class Browse : public QWidget
{
Q_OBJECT

public:
explicit Browse(QString input_filename, QWidget *parent = 0);
~Browse();

private:
QFileSystemModel *dirmodel;
QFileSystemModel *filemodel;
QString input_filename; //file name we need user to select. It is input from the mainwindow
QListWidget *fileview;
QTreeView *dirview;
QString filename;

public slots:
void on_dirview_clicked(QModelIndex index);
void on_fileview_clicked(QModelIndex index);
void ok_pushbutton_clicked();

};

#endif // WIDGET_H
@

@
#include "browse.h"

#include <QtGui/QApplication>
#include <QtCore>
#include <QtGui>
#include <QDebug>
#include <QString>
#include <QPushButton>
#include <QSpacerItem>
#include <QFile>

Browse::Browse(QString input_filename, QWidget *parent) :
QWidget(parent)
{

qDebug() << "input filename " <&lt; input_filename;

QLabel *title = new QLabel;

QLabel *folderlabel = new QLabel;
QLabel *fileslabel = new QLabel;

QWidget *window = new QWidget;
QGridLayout *layout = new QGridLayout;

//this-&gt;fileview = new QListView;
this->fileview = new QListWidget;
this->dirview = new QTreeView;

this->dirmodel = new QFileSystemModel;
this->filemodel = new QFileSystemModel;
QPushButton *okbutton = new QPushButton;
okbutton->setText("OK");

connect (dirview,SIGNAL(clicked(QModelIndex)),this, SLOT(on_dirview_clicked(QModelIndex)));
connect (fileview,SIGNAL(clicked(QModelIndex)),this, SLOT(on_fileview_clicked(QModelIndex)));

connect (okbutton,SIGNAL(clicked()),this,SLOT(ok_pushbutton_clicked()));

title->setText("Select folder containing the database file - Setting.dB  !");

folderlabel->setText("Folders");
fileslabel->setText("Database Files");

QString spath;
spath = QDir::currentPath();

dirmodel->setRootPath(spath);
dirmodel->setFilter(QDir::NoDotAndDotDot | QDir::AllDirs);
dirview->setModel(dirmodel);
for (int i=1; i<=4; i++)
{   dirview->hideColumn(i);}

/*
filemodel->setRootPath(spath);
filemodel->setFilter(QDir::NoDotAndDotDot | QDir::Files);
fileview->setModel(filemodel);
*/

//QSpacerItem *spacer = new QSpacerItem;

layout->addWidget(title,0,0);

layout->addWidget(folderlabel,1,0);
layout->addWidget(fileslabel,1,1);

layout->addWidget(dirview,2,0);
layout->addWidget(fileview,2,1);

//layout->addWidget(spacer,3,1);
layout->addWidget(okbutton,3,1);

window->setLayout(layout);

//window->showMaximized();
window->show();

}

Browse::~Browse()
{
delete this->filemodel;
delete this->fileview;
delete this->dirview;
delete this->dirmodel;
}

void Browse::on_dirview_clicked(QModelIndex index)
{
QString spath;
spath = this->dirmodel->fileInfo(index).absoluteFilePath();
qDebug() << spath;
QString dbfile;
dbfile = spath + "/freeswitch.txt";
bool fileexist = QFile::exists(dbfile);
if (fileexist) // dbfile exists
{
fileview->addItem("Freeswitch.txt");
this->filename=dbfile;
fileview->item(0)->setSelected(true);
}

//this->fileview->setRootIndex(filemodel->setRootPath(spath));

}

void Browse::on_fileview_clicked(QModelIndex index)
{
//filename = this->filemodel->fileInfo(index).absoluteFilePath();
qDebug() << this->filename;
}

void Browse::ok_pushbutton_clicked()
{
//QString a = this->fileview->SelectedClicked;
qDebug() << this->filename << "folder and path";
QMetaObject::invokeMethod(this, "close", Qt::QueuedConnection);//important line

}

@

AcerExtensa

I'm wondering how does it work at all :) Have you read links I've send you?
I hope this program is only for your learning and testing Qt, right?
@
Browse * w = new Browse("Setting.dB");
w->show();
@

make it modal if you need. "setWindowModality":http://qt-project.org/doc/qt-4.8/qwidget.html#windowModality-prop

Why do you need another one QWidget in your Browse class if your Browse class is an QWidget already?

delete this:
@QWidget *window = new QWidget;@

and change this:
@
window->setLayout(layout);
//window->showMaximized();
window->show();
@

to:

@this->setLayout(layout);@

SherifOmran

yes i read the link. Yes, I am learning QT and Cpp newly. It works now, my friend. Thank you

AcerExtensa

It's OK. Qt tutorials and videos will help you a lot too!

SherifOmran

I have another question, that i would appreciate if you help me with it.
I am using MAC, it is possible from my MAC QT to produce an exe compiled version and / or linux or should I install QT over windows and linux?

AcerExtensa

No you can't, you can maybe cross-compile for linux, but not for windows(you can cross-compile for linux and install complete cygwin system on your windows, it will work, maybe....).

SherifOmran

how do you use the setwindowmodality?
I need the browse window to be child and can not be reopened unless before closed

@
Browse * w = new Browse(dB_Setting);
w->show;
@

@ Browse class

this->setWindowModality(Qt::WindowModal);
@

AcerExtensa

Set it in your Browse class constructor:
@
Browser::Browser(QWidget *parent):QWidget(parent)
{
qDebug() << "input filename " << input_filename;
this->setWindowModality(Qt::ApplicationModal);
@

If you really want to block event loop of main application and stay in on_loginbrowse_clicked function till user closes browse widget, make your Browse class subclass QDialog instead of QWidget, QDialog has own event loop. So your code will work well:

@
class Browse : public QDialog
{
Q_OBJECT
public:
...
@

@
void Login::on_loginbrowse_clicked()
{
// selecting a new setting.dB file
Browse w("Setting.dB"); // Browse searching for Setting.dB
}@

SherifOmran

I changed to QDialog as follows

@

class Browse : public QDialog
{
Q_OBJECT

public:
explicit Browse(QString input_filename, QWidget *parent = 0);
~Browse();
QString OutputFileName;

@

QString InputFileName;

Browse::Browse(QString input_filename, QWidget *parent) :
QDialog(parent)
{

@

Then i use the following to test waiting loop of QDialog

@
oid Login::on_loginbrowse_clicked()
{
Browse * w = new Browse(dB_Setting);
w->show();
qDebug() << "return from browse";
}
@

but when i click on browse, it prints return . It should wait till i select a file and then I should return the file name selected. I am still struggeling with it.

SherifOmran

OK I found it, it should be
@
w->exec();
@

and not
@
w->show();
@

but how to return the value selected?

AcerExtensa

I've told you, if you use QDialog you can use your code:

@
oid Login::on_loginbrowse_clicked()
{
Browse w(this,dB_Setting);
w.exec();
qDebug() << "return from browse";
}
@

AcerExtensa

Or so... :)

You need filename value, right? Create function for getting this value:
@
public:
QString getValue(){return this->filename;}

@

after dialog exits you can get your value like this:
@
void Login::on_loginbrowse_clicked()
{
Browse * w = new Browse(dB_Setting);
w->exec();
qDebug() << "return from browse: " << w->getValue();
//and don't forget to delete this instance:
delete w;
}
@

SherifOmran

I have an issue over MAC. I need to show drives or at least to start with the current apppath folder

I used the following filter but I don't see drives, I have / only however when i loads, it shows volumes folder and the dissapears. I can not set the current path of the modelview to the current directory called set in AppPath QString.

@
dirmodel->setFilter(QDir::Dirs | QDir::Drives | QDir::NoDotAndDotDot | QDir::AllDirs);
@

SherifOmran

Solved showing drives in MAC, since folder volumes is hidden, I used QDir::Hidden.
Although this is not the proper way but it is a bug in QT "Reported here":https://bugreports.qt-project.org/browse/QTBUG-6875

@
dirmodel->setFilter(QDir::Dirs | QDir::Drives | QDir::Hidden | QDir::NoDotAndDotDot | QDir::AllDirs);
@

SherifOmran

I have another question, I created a QDialog on the fly as this, then I want to differentiate between being closed normally with the (x) button or being closed through the ok button.

@
QDialog *modifypsswdwin = new QDialog (this);
QLabel *newpsd1 = new QLabel(this); newpsd1->setText("New password");
QPushButton *modifypsswdwin_ok = new QPushButton(this); modifypsswdwin_ok->setText("OK");
connect(modifypsswdwin_ok,SIGNAL(clicked()),modifypsswdwin,SLOT(close()));
int ret=modifypsswdwin.exec();
@

I searched and found that I need to do
@
QDialog.setResult(1)
@

but the question is how to setthe result if i have only 1 line in the connect. Is it possible to write multiple commands in the slot(close)?

thank you

SherifOmran

I found it, we should connect accept to the button as well

connect(modifypsswdwin_ok,SIGNAL(clicked()),modifypsswdwin,SLOT(accept()));
connect(modifypsswdwin_ok,SIGNAL(clicked()),modifypsswdwin,SLOT(close()));

SherifOmran

I have a problem with the stylesheet. I use a style sheet file. I want to set a style sheet for this browse class from the file and not hardcoded. It works when it is hardcorded in the program but i don't know how to call it in the file. I tried #Browse and tried QDialogBox#Browse but did not work.

Any idea?