Qt 5.7 | Qt Quick | Qt Quick Text Input Handling and Validators

Qt 5.7.1 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.

Qt Quick Text Validators | Types that validate text input

      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.