Detailed Description
The QInputDialog class provides a simple convenience dialog to get a single value from the user.
The input value can be a string, a number or an item from a list. A label must be set to tell the user what they should enter.
Four static convenience functions are provided: getText(), getInteger(), getDouble() and getItem(). All the functions can be used in a similar way, for example:
bool ok;
QString text = QInputDialog::getText(this, tr("QInputDialog::getText()"),
tr("User name:"), QLineEdit::Normal,
QDir::home().dirName(), &ok);
if (ok && !text.isEmpty())
textLabel->setText(text);
The ok variable is set to true if the user clicks OK; otherwise it is set to false.
The Standard Dialogs example shows how to use QInputDialog as well as other built-in Qt dialogs.
See also QMessageBox and Standard Dialogs Example.
Member Function Documentation
double QInputDialog::getDouble ( QWidget * parent, const QString & title, const QString & label, double value = 0, double minValue = -2147483647, double maxValue = 2147483647, int decimals = 1, bool * ok = 0, Qt::WindowFlags f = 0 ) [static]
Static convenience function to get a floating point number from the user. title is the text which is displayed in the title bar of the dialog. label is the text which is shown to the user (it should say what should be entered). value is the default floating point number that the line edit will be set to. minValue and maxValue are the minimum and maximum values the user may choose, and decimals is the maximum number of decimal places the number may have.
If ok is non-null, *ok will be set to true if the user pressed OK and to false if the user pressed Cancel. The dialog's parent is parent. The dialog will be modal and uses the widget flags f.
This function returns the floating point number which has been entered by the user.
Use this static function like this:
bool ok;
double d = QInputDialog::getDouble(this, tr("QInputDialog::getDouble()"),
tr("Amount:"), 37.56, -10000, 10000, 2, &ok);
if (ok)
doubleLabel->setText(QString("$%1").arg(d));
See also getText(), getInteger(), and getItem().
int QInputDialog::getInteger ( QWidget * parent, const QString & title, const QString & label, int value = 0, int minValue = -2147483647, int maxValue = 2147483647, int step = 1, bool * ok = 0, Qt::WindowFlags f = 0 ) [static]
Static convenience function to get an integer input from the user. title is the text which is displayed in the title bar of the dialog. label is the text which is shown to the user (it should say what should be entered). value is the default integer which the spinbox will be set to. minValue and maxValue are the minimum and maximum values the user may choose, and step is the amount by which the values change as the user presses the arrow buttons to increment or decrement the value.
If ok is non-null *ok will be set to true if the user pressed OK and to false if the user pressed Cancel. The dialog's parent is parent. The dialog will be modal and uses the widget flags f.
This function returns the integer which has been entered by the user.
Use this static function like this:
bool ok;
int i = QInputDialog::getInteger(this, tr("QInputDialog::getInteger()"),
tr("Percentage:"), 25, 0, 100, 1, &ok);
if (ok)
integerLabel->setText(tr("%1%").arg(i));
See also getText(), getDouble(), and getItem().
QString QInputDialog::getItem ( QWidget * parent, const QString & title, const QString & label, const QStringList & list, int current = 0, bool editable = true, bool * ok = 0, Qt::WindowFlags f = 0 ) [static]
Static convenience function to let the user select an item from a string list. title is the text which is displayed in the title bar of the dialog. label is the text which is shown to the user (it should say what should be entered). list is the string list which is inserted into the combobox, and current is the number of the item which should be the current item. If editable is true the user can enter their own text; if editable is false the user may only select one of the existing items.
If ok is non-null *a ok will be set to true if the user pressed OK and to false if the user pressed Cancel. The dialog's parent is parent. The dialog will be modal and uses the widget flags f.
This function returns the text of the current item, or if editable is true, the current text of the combobox.
Use this static function like this:
QStringList items;
items << tr("Spring") << tr("Summer") << tr("Fall") << tr("Winter");
bool ok;
QString item = QInputDialog::getItem(this, tr("QInputDialog::getItem()"),
tr("Season:"), items, 0, false, &ok);
if (ok && !item.isEmpty())
itemLabel->setText(item);
See also getText(), getInteger(), and getDouble().
QString QInputDialog::getText ( QWidget * parent, const QString & title, const QString & label, QLineEdit::EchoMode mode = QLineEdit::Normal, const QString & text = QString(), bool * ok = 0, Qt::WindowFlags f = 0 ) [static]
Static convenience function to get a string from the user. title is the text which is displayed in the title bar of the dialog. label is the text which is shown to the user (it should say what should be entered). text is the default text which is placed in the line edit. The mode is the echo mode the line edit will use. If ok is non-null *a ok will be set to true if the user pressed OK and to false if the user pressed Cancel. The dialog's parent is parent. The dialog will be modal and uses the widget flags f.
This function returns the text which has been entered in the line edit. It will not return an empty string.
Use this static function like this:
bool ok;
QString text = QInputDialog::getText(this, tr("QInputDialog::getText()"),
tr("User name:"), QLineEdit::Normal,
QDir::home().dirName(), &ok);
if (ok && !text.isEmpty())
textLabel->setText(text);
See also getInteger(), getDouble(), and getItem().
