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1

Saturday, February 4th 2012, 12:26pm

how to set qfilewatcher to not to send a signal of the file changed by my software

how set qfilewatcher to not to send a signal of the file changed by my software
i have a Qfilewachter when ever the file changes it gives me signals so its good for me
but
when my software save the file contents to the file then also it sends signals and it create a major problem for me how to fix that problem

2

Saturday, February 4th 2012, 3:05pm

disconnect the signal before saving, reconnect afterwards
If you have a problem, CUT and PASTE your code. Do not retype or simplify it. Give a COMPLETE and COMPILABLE example of your problem. Otherwise we are all guessing the problem from a fabrication where relevant details are often missing.

3

Sunday, February 5th 2012, 5:14am

can you tell me how to reconnect again
i am using the function
connect()
to reconnect but it excepts more arguements
can you give me a sample script

4

Sunday, February 5th 2012, 11:31am

C++ is not scriptable. There are no c++ scripts. C++ is written in compilable code files.

Qt docs are very good. I suggest you get familiar with them - there is some example code here:
http://developer.qt.nokia.com/doc/qt-4.8…ct.html#connect
If you have a problem, CUT and PASTE your code. Do not retype or simplify it. Give a COMPLETE and COMPILABLE example of your problem. Otherwise we are all guessing the problem from a fabrication where relevant details are often missing.

5

Monday, February 6th 2012, 9:27am

can you give me an example of how to connect and disconnect QFilewatcher a working example

6

Monday, February 6th 2012, 9:48am

how about you try, and then if it doesn't work, post your code.
If you have a problem, CUT and PASTE your code. Do not retype or simplify it. Give a COMPLETE and COMPILABLE example of your problem. Otherwise we are all guessing the problem from a fabrication where relevant details are often missing.

7

Monday, February 6th 2012, 9:51am

i am continisuly trying
but it does not works what is the command for the file wathcer to connect and disconnect

8

Monday, February 6th 2012, 1:18pm

i already showed you in post 4
If you have a problem, CUT and PASTE your code. Do not retype or simplify it. Give a COMPLETE and COMPILABLE example of your problem. Otherwise we are all guessing the problem from a fabrication where relevant details are often missing.

9

Friday, February 10th 2012, 5:10am

the code

here is the code

Source code

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#include "mainwindow.h"
#include "ui_mainwindow.h"
MainWindow::MainWindow(QWidget *parent) :
	QMainWindow(parent),
	ui(new Ui::MainWindow)
{
	ui->setupUi(this);
	tabs = new QTabWidget();
	watcher = new QFileSystemWatcher();
	ui->mainToolBar->setFloatable(false);
	ui->mainToolBar->setMovable(false);
	setWindowTitle("cute edit");
	setCentralWidget(tabs);
	QObject::connect(watcher , SIGNAL(fileChanged(QString)) , this , SLOT(reloadfile(QString)));
}
MainWindow::~MainWindow()
{
	delete ui;
}
void MainWindow::savefile()
{
	QString cfileurl=list[tabs->currentIndex()];
	if(cfileurl.isEmpty())
	{
	savefileas();
	}
	else
	{
    	QFile file(cfileurl);
    	if(file.open(QIODevice::WriteOnly|QIODevice::Text))
    	{
    	QPlainTextEdit * editor =qobject_cast<QPlainTextEdit *>(tabs->currentWidget());
    	file.write(editor->toPlainText().toUtf8());
    	statusBar()->showMessage(tr("file successfully saved") , 3000);
    	}
 	}
}
void MainWindow::savefile(QString url)
{
	QFile file(url);
	if(file.open(QIODevice::WriteOnly|QIODevice::Text))
	{
	QPlainTextEdit * editor =qobject_cast<QPlainTextEdit *>(tabs->currentWidget());
	watcher->disconnect();
	file.write(editor->toPlainText().toUtf8());
	watcher->blockSignals(false);
	list[tabs->currentIndex()]=url;
	QFileInfo fileinfo(file);
	registerfile(url , fileinfo.fileName() , tabs->currentIndex());
	statusBar()->showMessage(tr("file succesfully saved")  , 3000);
	}
}
void MainWindow::savefileas()
{
QString fileurl;
fileurl=QFileDialog::getSaveFileName();
savefile(fileurl);
}
void MainWindow::openfile()
{
QString fileurl;
fileurl = QFileDialog::getOpenFileName();
QFile file(fileurl);
	if(list.contains(fileurl))
	{
	switchtotab(fileurl);
	return ;
	}
	if(file.open(QIODevice::ReadOnly|QIODevice::Text))
	{
	QPlainTextEdit * edit =qobject_cast<QPlainTextEdit *>(tabs->currentWidget());
    	int i;
    	if(!edit->toPlainText().isEmpty())
    	{
    	i = newfile();
    	}
    	else
    	{
    	i = tabs->currentIndex();
    	}
	QPlainTextEdit * editor =qobject_cast<QPlainTextEdit *>(tabs->widget(i));
	editor->setPlainText(file.readAll());
	QFileInfo info(file);
	registerfile(fileurl ,info.fileName() , i);
	}
}
void MainWindow::on_actionSave_triggered()
{
	savefile();
}

void MainWindow::on_actionCut_triggered()
{
	cut();
}
void MainWindow::on_actionCopy_triggered()
{
	copy();
}

void MainWindow::on_actionPaste_triggered()
{
	paste();
}

void MainWindow::on_actionSelect_all_triggered()
{
	selectall();
}

void MainWindow::on_actionDelete_triggered()
{
	deleteselected();
}
bool MainWindow::mydiscarddocument()
{
	QPlainTextEdit * editor =qobject_cast<QPlainTextEdit *>(tabs->currentWidget());
	if(editor->document()->isModified())
	{
    	QString filename=list[tabs->currentIndex()];
    	if(filename.isEmpty()){filename=tr("unnamed");}
    	if(!QMessageBox::question(this , tr("save document") , tr("you want to create a new document" "but the changes in current document has not been saved"
                                                              	"how do you want to proceed") ,tr("save document") , tr("discard document")))
    	{
    	savefile();
    	return true;
    	}
	}
	return false;
}
void MainWindow::on_actionnew_2_triggered()
{
	newfile();
}

void MainWindow::on_actionCut_2_triggered()
{
	cut();
}

void MainWindow::on_actionCopy_2_triggered()
{
	copy();
}

void MainWindow::on_actionQuit_triggered()
{
	this->close();
}

void MainWindow::on_actionManual_triggered()
{

}
void MainWindow::manaul()
{
QMessageBox box;
box.setText("cute edit is a small text editor which is aimed to be easy in use and simple and with basic features for a home user");
}

void MainWindow::on_actionFind_and_replace_triggered()
{
	fard();
}
void MainWindow::fard()
{
	QWidget * win = new QWidget();
	QVBoxLayout * layout = new QVBoxLayout();
	find = new QLineEdit();
	replace = new QLineEdit();
	QLabel * tofind = new QLabel("to find");
	QLabel * toreplace = new QLabel("replace with");
	QPushButton * button = new QPushButton("find and replace");
	layout->addWidget(tofind);
	layout->addWidget(find);
	layout->addWidget(toreplace);
	layout->addWidget(replace);
	layout->addWidget(button);
	QObject::connect(button , SIGNAL(clicked()) , this , SLOT(far()));
	win->setFixedSize(400 , 200);
	win->setWindowTitle("find and replace");
	win->setLayout(layout);
	win->show();
}
void MainWindow::far()
{
	QPlainTextEdit * editor =qobject_cast<QPlainTextEdit *>(tabs->currentWidget());
	QString tofind = find->text();
	QString toreplace = replace->text();
	editor->setPlainText(editor->toPlainText().replace(tofind , toreplace));
}
void MainWindow::addtab()
{
	QTextEdit * edit = new QTextEdit();
	tabs->addTab(edit , "213123");
}
void MainWindow::cut()
{
QPlainTextEdit * editor =qobject_cast<QPlainTextEdit *>(tabs->currentWidget());
editor->cut();
}
void MainWindow::copy()
{
QPlainTextEdit * editor =qobject_cast<QPlainTextEdit *>(tabs->currentWidget());
editor->copy();
}
void MainWindow::paste()
{
QPlainTextEdit * editor =qobject_cast<QPlainTextEdit *>(tabs->currentWidget());
editor->paste();
}
void MainWindow::selectall()
{
QPlainTextEdit * editor =qobject_cast<QPlainTextEdit *>(tabs->currentWidget());
editor->selectAll();
}
void MainWindow::deleteselected()
{
QPlainTextEdit * editor =qobject_cast<QPlainTextEdit *>(tabs->currentWidget());
editor->textCursor().removeSelectedText();
}
int MainWindow::newfile()
{
	QPlainTextEdit * edit = new QPlainTextEdit();
	int i = tabs->addTab(edit , "untilted");
	tabs->setCurrentIndex(i);
	list.insert(i , "");
	return  i;
}

void MainWindow::registerfile(QString url, QString basename , int index)
{
	list[index]=url;
	watcher->addPath(url);
	tabs->setTabText(index , basename);
}
bool MainWindow::newfile(QString url)
{
	if(list.contains(url))
	{
	switchtotab(url);
	return true;
	}
	QPlainTextEdit * edit = new QPlainTextEdit();
	QFile file(url);
	if(file.exists())
	{
    	QFileInfo fileinfo(file);
    	if(file.open(QIODevice::ReadOnly|QIODevice::Text))
    	{
    	int i = tabs->addTab(edit , fileinfo.baseName());
    	registerfile(url  , fileinfo.fileName() , i);
    	QPlainTextEdit * editor =qobject_cast<QPlainTextEdit *>(tabs->widget(i));
    	editor->setPlainText(file.readAll());
    	}
    	else
    	{
    	return false;
    	}
	}
return true;
}

void MainWindow::on_actionFile_triggered()
{
	newfile();
}
void MainWindow::fileurl()
{
	QWidget * win = new QWidget();
	QVBoxLayout * layout = new QVBoxLayout();
	url = new QLineEdit();
	QPushButton * button = new QPushButton("open");
	layout->addWidget(url);
	layout->addWidget(button);
	win->setFixedWidth(500);
	win->setLayout(layout);
	win->show();
	QObject::connect(button , SIGNAL(clicked()) , this , SLOT(openfileurl()));
}
void MainWindow::openfileurl()
{
	QString u = url->text();
    	if(list.contains(u))
    	{
    	switchtotab(u);
    	return ;
    	}
	QFile file(u);
	if(!file.exists()){return;}
    	if(file.open(QIODevice::ReadOnly|QIODevice::Text))
    	{
    	int i = newfile();
    	QPlainTextEdit * editor = qobject_cast<QPlainTextEdit *>(tabs->widget(i));
    	editor->setPlainText(file.readAll());
    	list[i]=u;
    	QFileInfo info(file);
    	registerfile(u ,info.fileName() , i);
    	}
}

void MainWindow::on_actionUndo_triggered()
{
	undo();
}
void MainWindow::redo()
{
	QPlainTextEdit * edit = qobject_cast<QPlainTextEdit *>(tabs->currentWidget());
	edit->redo();
}
void MainWindow::undo()
{
	QPlainTextEdit *edit = qobject_cast<QPlainTextEdit *>(tabs->currentWidget());
	edit->undo();
}

void MainWindow::on_actionRedo_triggered()
{
	redo();
}

void MainWindow::on_actionUndo_2_triggered()
{
	undo();
}

void MainWindow::on_actionRedo_2_triggered()
{
	redo();
}

void MainWindow::on_actionFile_2_triggered()
{
	openfile();
}

void MainWindow::on_actionUrl_triggered()
{
	fileurl();
}
void MainWindow::switchtotab(QString url)
{
int index = list.indexOf(url);
tabs->setCurrentIndex(index);
}

void MainWindow::on_actionPaste_2_triggered()
{
	paste();
}
void MainWindow::reloadfile(QString url)
{
int i = list.indexOf(url);
QFile file(url);
	if(!QMessageBox::question(this , "file changed" , ("the file ") + url + ("has been changed on disk what do you want") , tr("get the new file contents") , tr("save my contenst to the file")))
	{
	QPlainTextEdit * redit =qobject_cast<QPlainTextEdit *>(tabs->widget(i));
    	if(file.open(QIODevice::ReadOnly))
    	{
    	redit->setPlainText(file.readAll());
    	}
	}
	else
	{
        	if(file.open(QIODevice::WriteOnly))
         	{
         	savefile(url);
         	}
	}
}

void MainWindow::on_actionAbout_triggered()
{
	QMessageBox::information(this , tr("about cute edit") , tr("cute edit is a basic text editor made for home users" " it is written in c++ using qt " "<html><br /><a href='http://opendeveloper.pcriot.com/'>website</a><br /></html>"));
}

void MainWindow::on_actionAbout_us_triggered()
{
	QMessageBox::information(this , tr("about us") , tr("my email:shubhammaheshwariy@gmail.com" " if you have any suggestion email me if you want to join me for development not only c++ but php and web development and others then you can contact me "));
}

Similar threads

Used tags

QFileWatcher, Signal