Need to find a way to save user inputs.

**tamhanna** · 17th October 2011, 01:50

A very simple solution is this Prefs class - it uses a file, not QSettings.

Qt Code:

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/*
 * ApplicationPrefs.cpp
 *
 *  Created on: Dec 31, 2009
 *      Author: TAMHAN
 */
 
#include "ApplicationPrefs.h"
#include <qDebug>
 
ApplicationPrefs::ApplicationPrefs()
{
	// TODO Auto-generated constructor stub
	myPasswordChangedFlag=false;
}
 
ApplicationPrefs::~ApplicationPrefs()
{
	// TODO Auto-generated destructor stub
	//CANNOT SAVE HERE, OR THE RED KEY WILL PREVENT DATA SAVAGE
}
 
void ApplicationPrefs::initPrefs()
{
	QFile prefFile(QDir::currentPath() + "/prefs.tmgn");
	if(!prefFile.open(QIODevice::ReadOnly))
	{
		defaultPrefs();
		return;
	}
	QDataStream in(&prefFile);
	quint32 version;
	in >> version; // not needed for this v
	if(version==1)
	{
		in >> myLongIntCache;
		int sampleVal;
		in >> sampleVal;
		myProtectionType=(QProtectionType)sampleVal;
 
		//Init new values from V2
		mySelfLockFlag=false;
		mySelfLockTime=60;
		myHideEmptyFieldsFlag=false;
		mySelfDestructIsArmedFlag=false;
		mySelfDestructPassword="";
		myMustUpdateSchemesFlag=true;
		myOldVersion=1;
		goto terminateInit;
	}
	in >> myLongIntCache;
	int sampleVal;
	in >> sampleVal;
	myProtectionType=(QProtectionType)sampleVal;
	//all below is new for V2
	in >> mySelfLockFlag;
	in >> mySelfLockTime;
	in >> myHideEmptyFieldsFlag;
	in >> mySelfDestructIsArmedFlag;
	in >> mySelfDestructPassword;
	in >> myMustUpdateSchemesFlag;
	myMustUpdateSchemesFlag=false;	
	if(version==2)
	{//update for Nokia only
		myMustUpdateSchemesFlag=true;
	}
	terminateInit:
	prefFile.close();
}
 
void ApplicationPrefs::savePrefs()
{
	QFile prefFile(QDir::currentPath() +"/prefs.tmgn");
		if(!prefFile.open(QIODevice::WriteOnly))
		{
			defaultPrefs();
			return;
		}
		QDataStream out(&prefFile);
		quint32 version=3;
		out << version; // not needed for this v		
		out << myLongIntCache;
		int sampleVal=myProtectionType;
		out << sampleVal;
		//all below is new for V2
		out << mySelfLockFlag;
		out << mySelfLockTime;
		out << myHideEmptyFieldsFlag;
		out << mySelfDestructIsArmedFlag;
		out << mySelfDestructPassword;
		out << myMustUpdateSchemesFlag;
		prefFile.close();
}
 
void ApplicationPrefs::defaultPrefs()
{
	myLongIntCache=1; //0 is reserved as magic number for XFER to other box
 
	mySelfLockFlag=false;
	mySelfLockTime=60;
	myHideEmptyFieldsFlag=false;
	mySelfDestructIsArmedFlag=false;
	mySelfDestructPassword="";
 
	myMustUpdateSchemesFlag=true;
	myOldVersion=0;
}
 
bool ApplicationPrefs::prefsExist()
{
	QFile prefFile(QDir::currentPath() +"/prefs.tmgn");
	if(prefFile.exists())
	{
		return true;
	}
	else
	{
		return false;
	}
}
 
quint64 ApplicationPrefs::getUniqueID()
{
	quint32 retval=myLongIntCache;
	myLongIntCache++;
	savePrefs();
	return retval;
}

/*
 * ApplicationPrefs.cpp
 *
 *  Created on: Dec 31, 2009
 *      Author: TAMHAN
 */

#include "ApplicationPrefs.h"
#include <qDebug>

ApplicationPrefs::ApplicationPrefs()
{
	// TODO Auto-generated constructor stub
	myPasswordChangedFlag=false;
}

ApplicationPrefs::~ApplicationPrefs()
{
	// TODO Auto-generated destructor stub
	//CANNOT SAVE HERE, OR THE RED KEY WILL PREVENT DATA SAVAGE
}

void ApplicationPrefs::initPrefs()
{
	QFile prefFile(QDir::currentPath() + "/prefs.tmgn");
	if(!prefFile.open(QIODevice::ReadOnly))
	{
		defaultPrefs();
		return;
	}
	QDataStream in(&prefFile);
	quint32 version;
	in >> version; // not needed for this v
	if(version==1)
	{
		in >> myLongIntCache;
		int sampleVal;
		in >> sampleVal;
		myProtectionType=(QProtectionType)sampleVal;
		
		//Init new values from V2
		mySelfLockFlag=false;
		mySelfLockTime=60;
		myHideEmptyFieldsFlag=false;
		mySelfDestructIsArmedFlag=false;
		mySelfDestructPassword="";
		myMustUpdateSchemesFlag=true;
		myOldVersion=1;
		goto terminateInit;
	}
	in >> myLongIntCache;
	int sampleVal;
	in >> sampleVal;
	myProtectionType=(QProtectionType)sampleVal;
	//all below is new for V2
	in >> mySelfLockFlag;
	in >> mySelfLockTime;
	in >> myHideEmptyFieldsFlag;
	in >> mySelfDestructIsArmedFlag;
	in >> mySelfDestructPassword;
	in >> myMustUpdateSchemesFlag;
	myMustUpdateSchemesFlag=false;	
	if(version==2)
	{//update for Nokia only
		myMustUpdateSchemesFlag=true;
	}
	terminateInit:
	prefFile.close();
}

void ApplicationPrefs::savePrefs()
{
	QFile prefFile(QDir::currentPath() +"/prefs.tmgn");
		if(!prefFile.open(QIODevice::WriteOnly))
		{
			defaultPrefs();
			return;
		}
		QDataStream out(&prefFile);
		quint32 version=3;
		out << version; // not needed for this v		
		out << myLongIntCache;
		int sampleVal=myProtectionType;
		out << sampleVal;
		//all below is new for V2
		out << mySelfLockFlag;
		out << mySelfLockTime;
		out << myHideEmptyFieldsFlag;
		out << mySelfDestructIsArmedFlag;
		out << mySelfDestructPassword;
		out << myMustUpdateSchemesFlag;
		prefFile.close();
}

void ApplicationPrefs::defaultPrefs()
{
	myLongIntCache=1; //0 is reserved as magic number for XFER to other box
	
	mySelfLockFlag=false;
	mySelfLockTime=60;
	myHideEmptyFieldsFlag=false;
	mySelfDestructIsArmedFlag=false;
	mySelfDestructPassword="";
	
	myMustUpdateSchemesFlag=true;
	myOldVersion=0;
}

bool ApplicationPrefs::prefsExist()
{
	QFile prefFile(QDir::currentPath() +"/prefs.tmgn");
	if(prefFile.exists())
	{
		return true;
	}
	else
	{
		return false;
	}
}

quint64 ApplicationPrefs::getUniqueID()
{
	quint32 retval=myLongIntCache;
	myLongIntCache++;
	savePrefs();
	return retval;
}

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**wysota** · 17th October 2011, 09:56

But it doesn't help you in storing settings for different types of objects, you still need to put everything in your ApplicationPrefs class and this class has to know every object it is to work with.

**tamhanna** · 17th October 2011, 23:24

Originally Posted by wysota

But it doesn't help you in storing settings for different types of objects, you still need to put everything in your ApplicationPrefs class and this class has to know every object it is to work with.

If this is the issue, I would proceed to trying XML. But the core issue always remains: the reading routine needs to know what it will read in.

**"BumbleBee"** · 29th October 2011, 12:22

Qt Code:

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void Victims::load()
{
    int grows = ui->tw->rowCount();
    int gcols = ui->tw->columnCount();
 
    QSettings set("victims");
    set.beginGroup("setting");
 
    for(int i = 0; i < grows ;i++)
    {
 
        for(int j = 0; j < gcols ;j++)
            {
                QTableWidgetItem* widgetItem = ui->tw->item(grows, gcols);
                QString ex = set.value("victims", str).toString();
                widgetItem->setText(ex);
            }
 
    }
 
    set.endGroup();
}
 
 
void Victims::save()
{
    int grows = ui->tw->rowCount();
    int gcols = ui->tw->columnCount();
 
    QSettings set("victims");
    set.beginGroup("setting");
 
    for(int i = 0; i < grows ;i++)
    {
 
        for(int j = 0; j < gcols ;j++)
            {
                QTableWidgetItem* widgetItem = ui->tw->item(grows, gcols);
                str = widgetItem->text();
            }
 
    }
    set.setValue("victims", str);
    set.endGroup();
}

void Victims::load()
{
    int grows = ui->tw->rowCount();
    int gcols = ui->tw->columnCount();

    QSettings set("victims");
    set.beginGroup("setting");

    for(int i = 0; i < grows ;i++)
    {

        for(int j = 0; j < gcols ;j++)
            {
                QTableWidgetItem* widgetItem = ui->tw->item(grows, gcols);
                QString ex = set.value("victims", str).toString();
                widgetItem->setText(ex);
            }

    }

    set.endGroup();
}


void Victims::save()
{
    int grows = ui->tw->rowCount();
    int gcols = ui->tw->columnCount();

    QSettings set("victims");
    set.beginGroup("setting");

    for(int i = 0; i < grows ;i++)
    {

        for(int j = 0; j < gcols ;j++)
            {
                QTableWidgetItem* widgetItem = ui->tw->item(grows, gcols);
                str = widgetItem->text();
            }

    }
    set.setValue("victims", str);
    set.endGroup();
}

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Can you tell me what I did wrong here?

**wysota** · 29th October 2011, 14:16

You should iterate over i and j instead of grows and gcols.

**Santosh Reddy** · 30th October 2011, 09:24

You can iterate through the ItemModel (instead of table widget items). Here a some what generic code, with which you can save & restore all item data roles. With a minor modifications and use of recursion this code can also be used to save TreeWidgets

Qt Code:

Switch view

void Victims::load()
{
	QAbstractItemModel* model = ui->tw->model();
	for(int row = 0; row < model->rowCount(); row++)
	{
		settings->beginGroup(QString("Row-%1").arg(row));
		for(int col = 0; col < model->columnCount(); col++)
		{
			settings->beginGroup(QString("Column-%1").arg(col));
			QModelIndex item = model->index(row, col);
			for(int role = 0; role < Qt::UserRole; role++)
			{
				model->setData(item, settings->value(QString("ItemDataRole-%1").arg(role))); // Restore from file
			}
			settings->endGroup();
		}
		settings->endGroup();
	}
}
 
 
void Victims::save()
{
	QAbstractItemModel* model = ui->tw->model();
	for(int row = 0; row < model->rowCount(); row++)
	{
		settings->beginGroup(QString("Row-%1").arg(row));
		for(int col = 0; col < model->columnCount(); col++)
		{
			settings->beginGroup(QString("Column-%1").arg(col));
			QModelIndex item = model->index(row, col);
			for(int role = 0; role < Qt::UserRole; role++)
			{
				settings->setValue(QString("ItemDataRole-%1").arg(role), model->data(item, role)); // Save to file
			}
			settings->endGroup();
		}
		settings->endGroup();
	}
}

void Victims::load()
{
	QAbstractItemModel* model = ui->tw->model();
	for(int row = 0; row < model->rowCount(); row++)
	{
		settings->beginGroup(QString("Row-%1").arg(row));
		for(int col = 0; col < model->columnCount(); col++)
		{
			settings->beginGroup(QString("Column-%1").arg(col));
			QModelIndex item = model->index(row, col);
			for(int role = 0; role < Qt::UserRole; role++)
			{
				model->setData(item, settings->value(QString("ItemDataRole-%1").arg(role))); // Restore from file
			}
			settings->endGroup();
		}
		settings->endGroup();
	}
}


void Victims::save()
{
	QAbstractItemModel* model = ui->tw->model();
	for(int row = 0; row < model->rowCount(); row++)
	{
		settings->beginGroup(QString("Row-%1").arg(row));
		for(int col = 0; col < model->columnCount(); col++)
		{
			settings->beginGroup(QString("Column-%1").arg(col));
			QModelIndex item = model->index(row, col);
			for(int role = 0; role < Qt::UserRole; role++)
			{
				settings->setValue(QString("ItemDataRole-%1").arg(role), model->data(item, role)); // Save to file
			}
			settings->endGroup();
		}
		settings->endGroup();
	}
}

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**"BumbleBee"** · 4th November 2011, 14:10

Originally Posted by Santosh Reddy

You can iterate through the ItemModel (instead of table widget items). Here a some what generic code, with which you can save & restore all item data roles. With a minor modifications and use of recursion this code can also be used to save TreeWidgets

Qt Code:

Switch view

void Victims::load()
{
	QAbstractItemModel* model = ui->tw->model();
	for(int row = 0; row < model->rowCount(); row++)
	{
		settings->beginGroup(QString("Row-%1").arg(row));
		for(int col = 0; col < model->columnCount(); col++)
		{
			settings->beginGroup(QString("Column-%1").arg(col));
			QModelIndex item = model->index(row, col);
			for(int role = 0; role < Qt::UserRole; role++)
			{
				model->setData(item, settings->value(QString("ItemDataRole-%1").arg(role))); // Restore from file
			}
			settings->endGroup();
		}
		settings->endGroup();
	}
}
 
 
void Victims::save()
{
	QAbstractItemModel* model = ui->tw->model();
	for(int row = 0; row < model->rowCount(); row++)
	{
		settings->beginGroup(QString("Row-%1").arg(row));
		for(int col = 0; col < model->columnCount(); col++)
		{
			settings->beginGroup(QString("Column-%1").arg(col));
			QModelIndex item = model->index(row, col);
			for(int role = 0; role < Qt::UserRole; role++)
			{
				settings->setValue(QString("ItemDataRole-%1").arg(role), model->data(item, role)); // Save to file
			}
			settings->endGroup();
		}
		settings->endGroup();
	}
}

void Victims::load()
{
	QAbstractItemModel* model = ui->tw->model();
	for(int row = 0; row < model->rowCount(); row++)
	{
		settings->beginGroup(QString("Row-%1").arg(row));
		for(int col = 0; col < model->columnCount(); col++)
		{
			settings->beginGroup(QString("Column-%1").arg(col));
			QModelIndex item = model->index(row, col);
			for(int role = 0; role < Qt::UserRole; role++)
			{
				model->setData(item, settings->value(QString("ItemDataRole-%1").arg(role))); // Restore from file
			}
			settings->endGroup();
		}
		settings->endGroup();
	}
}


void Victims::save()
{
	QAbstractItemModel* model = ui->tw->model();
	for(int row = 0; row < model->rowCount(); row++)
	{
		settings->beginGroup(QString("Row-%1").arg(row));
		for(int col = 0; col < model->columnCount(); col++)
		{
			settings->beginGroup(QString("Column-%1").arg(col));
			QModelIndex item = model->index(row, col);
			for(int role = 0; role < Qt::UserRole; role++)
			{
				settings->setValue(QString("ItemDataRole-%1").arg(role), model->data(item, role)); // Save to file
			}
			settings->endGroup();
		}
		settings->endGroup();
	}
}

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Thanks for putting all this code.But the save slot doesn't work..after loading,the table is empty!!!!

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