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[править] QInputDialog Class Reference
^{[модуль QtGui ]}

The QInputDialog class provides a simple convenience dialog to get a single value from the user. Далее...

 #include <QInputDialog>

Наследует QDialog.

• Список всех членов, включая унаследованные
• Поддерживаемые члены Qt 3

[править] Статические открытые члены

• double 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 )
• int 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 )
• QString 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 )
• QString 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 )

• 4 статических открытых члена, унаследованных от QWidget
• 5 статических открытых членов, унаследованных от QObject

[править] Дополнительные унаследованные члены

• 2 войства, унаследованные от QDialog
• 56 свойств, унаследованных от QWidget
• 1 свойство, унаследованное от QObject
• 5 открытых функций, унаследованных от QDialog
• 201 свойство, унаследованное от QWidget
• 29 открытых функций, унаследованных от QObject
• 12 открытых функций, унаследованных от QPaintDevice
• 4 открытых слота, унаследованные от QDialog
• 19 открытых слотов, унаследованных от QWidget
• 1 открытый слот, унаследованный от QObject
• 3 сигнала, унаследованные от QDialog
• 1 сигнал, унаследованный от QWidget
• 1 сигнал, унаследованный от QObject
• 38 защищенных функций, унаследованных от QWidget
• 7 защищенных функций, унаследованных от QObject
• 1 защищенная функция, унаследованных от QPaintDevice
• 1 защищенный слот, унаследованый от QWidget

[править] Подробное описание

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.

[править] Описание функций-членов

[править]

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().

[править]

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().

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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, &amp;ok);
     if (ok &amp;&amp; !item.isEmpty())
         itemLabel->setText(item);

See also getText(), getInteger(), and getDouble().

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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().