- Qt 5.5
- Qt Quick
- Qt Quick Text Input Handling and Validators
- Qt 5.5.1 Reference Documentation

# Qt Quick Text Input Handling and Validators

## Text Visual Types

Qt Quick provides several types to display text onto the screen. The Text type will display formatted text onto the screen, the TextEdit type will place a multiline line edit onto the screen, and the TextInput will place a single editable line field onto the screen.

To learn more about their specific features and properties, visit their respective documentation.

## Validating Input Text

The validator types enforce the type and format of TextInput objects.

    Column {
        spacing: 10

        Text {
            text: "Enter a value from 0 to 2000"
        }
        TextInput {
            focus: true
            validator: IntValidator { bottom:0; top: 2000}
        }
    }

The validator types bind to `TextInput`'s `validator` property.

    Column {
        spacing: 10

        Text {
            text: "Which basket?"
        }
        TextInput {
            focus: true
            validator: RegExpValidator { regExp: /fruit basket/ }
        }
    }

The regular expression in the snippet will only allow the inputted text to be `fruit basket`.

Note that QML parses JavaScript regular expressions, while Qt's QRegExp class' regular expressions are based on Perl regular expressions.