[SOLVED] saving the result of a check box
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QCheckBox* checkbox; is crashing my compiled program. do i need to put something in the header?
[quote author="cincirin" date="1312528415"]make sure you have initialized application & organization name first[/quote]
I don't understand that part of your quote.
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Can you show us your UI file ?
Also, see "QSettings basic usage":http://doc.qt.nokia.com/stable/qsettings.html#basic-usage -
I fixed the code. now it does not give me an error but it still does not save the state of the check box
@#include "tipoftheday.h"
#include "ui_tipoftheday.h"
#include "mainwindow.h"
#include <QDesktopWidget>
#include <QSettings>
#include <QCheckBox>TipOfTheDay::TipOfTheDay(QWidget *Child) :
QDialog(Child, Qt::CustomizeWindowHint |
Qt::WindowCloseButtonHint ),
ui(new Ui::TipOfTheDay)
{
ui->setupUi(this);
this->setFixedSize(width(), height());QSettings settings; QCheckBox checkbox; checkbox.setChecked(settings.value("checkstate").toBool()); // load check-box state}
TipOfTheDay::~TipOfTheDay()
{
delete ui;
}void TipOfTheDay::on_checkBox_clicked()
{
QSettings settings;
QCheckBox checkbox;
settings.setValue("checkstate", checkbox.isChecked()); // save check-box state
}@ -
Then ...
@
QSettings settings; // make sure you have initialized application & organization name first
QCheckBox* checkBox = ui->checkBox; // your check box
settings.setValue("checkstate", checkBox->isChecked(); // save check-box state
checkBox->setChecked(settings.value("checkstate").toBool()) // load check-box state
@ -
Please remove line 18 and line 31, which define another two top windows, although you cannot see them.
Change the name "checkbox" in line 19 and line 32 the the name of your QCheckBox which shown in your Widget.
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Hi kalster,
youi have a C++ error here:
@
void TipOfTheDay::on_checkBox_clicked()
{
QSettings settings;
QCheckBox checkbox;
settings.setValue("checkstate", checkbox.isChecked()); // save check-box state
}
@you create a local QCheckbox on the stack, which will never show up anywhere and try to store it's state. But instead, you have to reference to the one from the UI
@
TipOfTheDay::TipOfTheDay(QWidget *Child) :
QDialog(Child, Qt::CustomizeWindowHint |
Qt::WindowCloseButtonHint ),
ui(new Ui::TipOfTheDay)
{
QSettings settings;
ui->checkBox->setChecked(settings.value("checkstate").toBool()); // load check-box state
}void TipOfTheDay::on_checkBox_clicked()
{
QSettings settings;
settings.setValue("checkstate", ui->checkBox->isChecked()); // save check-box state
}
@This is standard in C++. A new variable will always create a new object, unless it's not a reference (XXX&) or a pointer. Some specials are here for singletons or monostates, but that's nothing for a UI.