TextInput QML Type

Sets the horizontal alignment of the text within the TextInput item's width and height. By default, the text alignment follows the natural alignment of the text, for example text that is read from left to right will be aligned to the left.

TextInput does not have vertical alignment, as the natural height is exactly the height of the single line of text. If you set the height manually to something larger, TextInput will always be top aligned vertically. You can use anchors to align it however you want within another item.

The valid values for horizontalAlignment are TextInput.AlignLeft, TextInput.AlignRight and TextInput.AlignHCenter.

Valid values for verticalAlignment are TextInput.AlignTop (default), TextInput.AlignBottom TextInput.AlignVCenter.

When using the attached property LayoutMirroring::enabled to mirror application layouts, the horizontal alignment of text will also be mirrored. However, the property horizontalAlignment will remain unchanged. To query the effective horizontal alignment of TextInput, use the read-only property effectiveHorizontalAlignment.

These properties hold the padding around the content. This space is reserved in addition to the contentWidth and contentHeight.

The individual padding properties assume the value of the padding property unless they are set explicitly. For example, if padding is set to 4 and leftPadding to 8, 8 will be used as the left padding.

This property is always true unless a validator or input mask has been set. If a validator or input mask has been set, this property will only be true if the current text is acceptable to the validator or input mask as a final string (not as an intermediate string).

Whether the TextInput should gain active focus on a mouse press. By default this is set to true.

Whether the TextInput should scroll when the text is longer than the width. By default this is set to true.

See also ensureVisible().

Returns true if the TextInput is writable and the content of the clipboard is suitable for pasting into the TextInput.

Returns true if the TextInput is writable and there are undone operations that can be redone.

Returns true if the TextInput is writable and there are previous operations that can be undone.

The text color.

Returns the height of the text, including the height past the height that is covered if the text does not fit within the set height.

Returns the width of the text, including the width past the width which is covered due to insufficient wrapping if wrapMode is set.

The delegate for the cursor in the TextInput.

If you set a cursorDelegate for a TextInput, this delegate will be used for drawing the cursor instead of the standard cursor. An instance of the delegate will be created and managed by the TextInput when a cursor is needed, and the x property of the delegate instance will be set so as to be one pixel before the top left of the current character.

Note that the root item of the delegate component must be a QQuickItem or QQuickItem derived item.

The position of the cursor in the TextInput. The cursor is positioned between characters.

displayText is different if echoMode is set to TextInput.Password: then each passwordCharacter is a "narrow" character (the cursorPosition always moves by 1), even if the text in the TextInput is not.

The rectangle where the standard text cursor is rendered within the text input. Read only.

The position and height of a custom cursorDelegate are updated to follow the cursorRectangle automatically when it changes. The width of the delegate is unaffected by changes in the cursor rectangle.

Set to true when the TextInput shows a cursor.

This property is set and unset when the TextInput gets active focus, so that other properties can be bound to whether the cursor is currently showing. As it gets set and unset automatically, when you set the value yourself you must keep in mind that your value may be overwritten.

It can be set directly in script, for example if a KeyProxy might forward keys to it and you desire it to look active when this happens (but without actually giving it active focus).

It should not be set directly on the item, like in the below QML, as the specified value will be overridden and lost on focus changes.

TextInput {
    text: "Text"
    cursorVisible: false
}

In the above snippet the cursor will still become visible when the TextInput gains active focus.

This is the text displayed in the TextInput.

If echoMode is set to TextInput::Normal, this holds the same value as the TextInput::text property. Otherwise, this property holds the text visible to the user, while the text property holds the actual entered text.

See also preeditText.

Specifies how the text should be displayed in the TextInput.

When using the attached property LayoutMirroring::enabled to mirror application layouts, the horizontal alignment of text will also be mirrored. However, the property horizontalAlignment will remain unchanged. To query the effective horizontal alignment of TextInput, use the read-only property effectiveHorizontalAlignment.

Sets whether the font weight is bold.

Sets the capitalization for the text.

TextInput { text: "Hello"; font.capitalization: Font.AllLowercase }

If the selected font does not contain a certain character, Qt automatically chooses a similar-looking fallback font that contains the character. By default this is done on a character-by-character basis.

This means that in certain uncommon cases, many different fonts may be used to represent one string of text even if it's in the same script. Setting contextFontMerging to true will try finding the fallback font that matches the largest subset of the input string instead. This will be more expensive for strings where missing glyphs occur, but may give more consistent results. By default, contextFontMerging is false.

This property was introduced in Qt 6.8.

See also QFont::StyleStrategy.

Sets the family name of the font.

The family name is case insensitive and may optionally include a foundry name, e.g. "Helvetica [Cronyx]". If the family is available from more than one foundry and the foundry isn't specified, an arbitrary foundry is chosen. If the family isn't available a family will be set using the font matching algorithm.

Applies integer values to specific OpenType features when shaping the text based on the contents in features. This provides advanced access to the font shaping process, and can be used to support font features that are otherwise not covered in the API.

The font features are represented by a map from four-letter tags to integer values. This integer value passed along with the tag in most cases represents a boolean value: A zero value means the feature is disabled, and a non-zero value means it is enabled. For certain font features, however, it may have other interpretations. For example, when applied to the salt feature, the value is an index that specifies the stylistic alternative to use.

For example, the frac font feature will convert diagonal fractions separated with a slash (such as 1/2) with a different representation. Typically this will involve baking the full fraction into a single character width (such as ½).

If a font supports the frac feature, then it can be enabled in the shaper as in the following code:

Text {
    text: "One divided by two is 1/2"
    font.family: "MyFractionFont"
    font.features: { "frac": 1 }
}

Multiple features can be assigned values in the same mapping. For instance, if you would like to also disable kerning for the font, you can explicitly disable this as follows:

Text {
    text: "One divided by two is 1/2"
    font.family: "MyFractionFont"
    font.features: { "frac": 1, "kern": 0 }
}

You can also collect the font properties in an object:

Text {
    text: "One divided by two is 1/2"
    font: {
        family: "MyFractionFont"
        features: { "frac": 1, "kern": 0 }
    }
}

This property was introduced in Qt 6.6.

See also QFont::setFeature().

Sets the preferred hinting on the text. This is a hint to the underlying text rendering system to use a certain level of hinting, and has varying support across platforms. See the table in the documentation for QFont::HintingPreference for more details.

TextInput { text: "Hello"; renderType: TextInput.NativeRendering; font.hintingPreference: Font.PreferVerticalHinting }

Sets whether the font has an italic style.

Enables or disables the kerning OpenType feature when shaping the text. Disabling this may improve performance when creating or changing the text, at the expense of some cosmetic features. The default value is true.

TextInput { text: "OATS FLAVOUR WAY"; font.kerning: false }

Sets the letter spacing for the font.

Letter spacing changes the default spacing between individual letters in the font. A positive value increases the letter spacing by the corresponding pixels; a negative value decreases the spacing.

Sets the font size in pixels.

Using this function makes the font device dependent. Use pointSize to set the size of the font in a device independent manner.

Sets the font size in points. The point size must be greater than zero.

Sometimes, a font will apply complex rules to a set of characters in order to display them correctly. In some writing systems, such as Brahmic scripts, this is required in order for the text to be legible, but in e.g. Latin script, it is merely a cosmetic feature. Setting the preferShaping property to false will disable all such features when they are not required, which will improve performance in most cases.

The default value is true.

TextInput { text: "Some text"; font.preferShaping: false }

competing sets of the vertical line metrics that provide the ascent, descent and leading of the font. These are often referred to as the win (Windows) metrics and the typo (typographical) metrics. While the specification recommends using the typo metrics for line spacing, many applications prefer the win metrics unless the USE_TYPO_METRICS flag is set in the fsSelection field of the font. For backwards-compatibility reasons, this is also the case for Qt applications. This is not an issue for fonts that set the USE_TYPO_METRICS flag to indicate that the typo metrics are valid, nor for fonts where the win metrics and typo metrics match up. However, for certain fonts the win metrics may be larger than the preferable line spacing and the USE_TYPO_METRICS flag may be unset by mistake. For such fonts, setting font.preferTypoLineMetrics may give superior results.

By default, preferTypoLineMetrics is false.

This property was introduced in Qt 6.8.

See also QFont::StyleStrategy.

Sets whether the font has a strikeout style.

Sets the style name of the font.

The style name is case insensitive. If set, the font will be matched against style name instead of the font properties font.weight, font.bold and font.italic.

Sets whether the text is underlined.

Applies floating point values to variable axes in variable fonts.

Variable fonts provide a way to store multiple variations (with different weights, widths or styles) in the same font file. The variations are given as floating point values for a pre-defined set of parameters, called "variable axes". Specific instances are typically given names by the font designer, and, in Qt, these can be selected using setStyleName() just like traditional sub-families.

In some cases, it is also useful to provide arbitrary values for the different axes. For instance, if a font has a Regular and Bold sub-family, you may want a weight in-between these. You could then manually request this by supplying a custom value for the "wght" axis in the font.

Text {
    text: "Foobar"
    font.family: "MyVariableFont"
    font.variableAxes: { "wght": (Font.Normal + Font.Bold) / 2.0 }
}

If the "wght" axis is supported by the font and the given value is within its defined range, a font corresponding to the weight 550.0 will be provided.

There are a few standard axes than many fonts provide, such as "wght" (weight), "wdth" (width), "ital" (italic) and "opsz" (optical size). They each have indivdual ranges defined in the font itself. For instance, "wght" may span from 100 to 900 (QFont::Thin to QFont::Black) whereas "ital" can span from 0 to 1 (from not italic to fully italic).

A font may also choose to define custom axes; the only limitation is that the name has to meet the requirements for a QFont::Tag (sequence of four latin-1 characters.)

By default, no variable axes are set.

This property was introduced in Qt 6.7.

See also QFont::setVariableAxis().

The requested weight of the font. The weight requested must be an integer between 1 and 1000, or one of the predefined values:

TextInput { text: "Hello"; font.weight: Font.DemiBold }

Sets the word spacing for the font.

Word spacing changes the default spacing between individual words. A positive value increases the word spacing by a corresponding amount of pixels, while a negative value decreases the inter-word spacing accordingly.

Allows you to set an input mask on the TextInput, restricting the allowable text inputs. See QLineEdit::inputMask for further details, as the exact same mask strings are used by TextInput.

See also acceptableInput and validator.

This property holds whether the TextInput has partial text input from an input method.

While it is composing an input method may rely on mouse or key events from the TextInput to edit or commit the partial text. This property can be used to determine when to disable events handlers that may interfere with the correct operation of an input method.

Provides hints to the input method about the expected content of the text input and how it should operate.

The value is a bit-wise combination of flags, or Qt.ImhNone if no hints are set.

Flags that alter behaviour are:

Flags that restrict input (exclusive flags) are:

Masks:

Returns the total number of characters in the TextInput item.

If the TextInput has an inputMask the length will include mask characters and may differ from the length of the string returned by the text property.

This property can be faster than querying the length the text property as it doesn't require any copying or conversion of the TextInput's internal string data.

The maximum permitted length of the text in the TextInput.

If the text is too long, it is truncated at the limit.

By default, this property contains a value of 32767.

Specifies how text should be selected using a mouse.

This property only applies when selectByMouse is true.

Whether text entered by the user will overwrite existing text.

As with many text editors, the text editor widget can be configured to insert or overwrite existing text with new text entered by the user.

If this property is true, existing text is overwritten, character-for-character by new text; otherwise, text is inserted at the cursor position, displacing existing text.

By default, this property is false (new text does not overwrite existing text).

This is the character displayed when echoMode is set to Password or PasswordEchoOnEdit. By default it is the password character used by the platform theme.

If this property is set to a string with more than one character, the first character is used. If the string is empty, the value is ignored and the property is not set.

Sets the delay before visible character is masked with password character, in milliseconds.

The reset method will be called by assigning undefined.

Whether the TextInput should keep its selection when it loses active focus to another item in the scene. By default this is set to false;

This property contains partial text input from an input method.

To turn off partial text that results from predictions, set the Qt.ImhNoPredictiveText flag in inputMethodHints.

See also displayText and inputMethodHints.

Sets whether user input can modify the contents of the TextInput.

If readOnly is set to true, then user input will not affect the text property. Any bindings or attempts to set the text property will still work.

Override the default rendering type for this component.

Supported render types are:

Select TextInput.NativeRendering if you prefer text to look native on the target platform and do not require advanced features such as transformation of the text. Using such features in combination with the NativeRendering render type will lend poor and sometimes pixelated results.

Both TextInput.QtRendering and TextInput.CurveRendering are hardware-accelerated techniques. QtRendering is the faster of the two, but uses more memory and will exhibit rendering artifacts at large sizes. CurveRendering should be considered as an alternative in cases where QtRendering does not give good visual results or where reducing graphics memory consumption is a priority.

The default rendering type is determined by QQuickWindow::textRenderType().

Defaults to true.

If true, the user can use the mouse to select text in the usual way.

This read-only property provides the text currently selected in the text input.

It is equivalent to the following snippet, but is faster and easier to use.

myTextInput.text.toString().substring(myTextInput.selectionStart,
    myTextInput.selectionEnd);

The highlighted text color, used in selections.

The text highlight color, used behind selections.

The cursor position after the last character in the current selection.

This property is read-only. To change the selection, use select(start,end), selectAll(), or selectWord().

See also selectionStart, cursorPosition, and selectedText.

The cursor position before the first character in the current selection.

This property is read-only. To change the selection, use select(start,end), selectAll(), or selectWord().

See also selectionEnd, cursorPosition, and selectedText.

The text in the TextInput.

Note that some keyboards use a predictive function. In this case, the text being composed by the input method is not part of this property. The part of the text related to the predictions is underlined and stored in the preeditText property. To get whole text displayed in the TextInput use displayText property.

See also clear(), displayText, and preeditText.

Allows you to set a validator on the TextInput. When a validator is set the TextInput will only accept input which leaves the text property in an acceptable or intermediate state. The accepted signal will only be sent if the text is in an acceptable state when enter is pressed.

Currently supported validators are IntValidator, DoubleValidator and RegularExpressionValidator. An example of using validators is shown below, which allows input of integers between 11 and 31 into the text input:

import QtQuick 2.0
TextInput{
    validator: IntValidator{bottom: 11; top: 31;}
    focus: true
}

See also acceptableInput and inputMask.

Set this property to wrap the text to the TextInput item's width. The text will only wrap if an explicit width has been set.

The default is TextInput.NoWrap. If you set a width, consider using TextInput.Wrap.

This signal is emitted when the Return or Enter key is pressed. Note that if there is a validator or inputMask set on the text input, the signal will only be emitted if the input is in an acceptable state.

This signal is emitted when the Return or Enter key is pressed or the text input loses focus. Note that if there is a validator or inputMask set on the text input and enter/return is pressed, this signal will only be emitted if the input follows the inputMask and the validator returns an acceptable state.

This signal is emitted whenever the text is edited. Unlike textChanged(), this signal is not emitted when the text is changed programmatically, for example, by changing the value of the text property or by calling clear().

Clears the contents of the text input and resets partial text input from an input method.

Use this method instead of setting the text property to an empty string.

See also QInputMethod::reset().

Copies the currently selected text to the system clipboard.

Moves the currently selected text to the system clipboard.

Removes active text selection.

Scrolls the contents of the text input so that the specified character position is visible inside the boundaries of the text input.

See also autoScroll.

Returns the section of text that is between the start and end positions.

If the TextInput has an inputMask the length will include mask characters.

Inserts text into the TextInput at position.

Returns true if the natural reading direction of the editor text found between positions start and end is right to left.

Moves the cursor to position and updates the selection according to the optional mode parameter. (To only move the cursor, set the cursorPosition property.)

When this method is called it additionally sets either the selectionStart or the selectionEnd (whichever was at the previous cursor position) to the specified position. This allows you to easily extend and contract the selected text range.

The selection mode specifies whether the selection is updated on a per character or a per word basis. If not specified the selection mode will default to TextInput.SelectCharacters.

For example, take this sequence of calls:

cursorPosition = 5
moveCursorSelection(9, TextInput.SelectCharacters)
moveCursorSelection(7, TextInput.SelectCharacters)

This moves the cursor to position 5, extend the selection end from 5 to 9 and then retract the selection end from 9 to 7, leaving the text from position 5 to 7 selected (the 6th and 7th characters).

The same sequence with TextInput.SelectWords will extend the selection start to a word boundary before or on position 5 and extend the selection end to a word boundary on or past position 9.

Replaces the currently selected text by the contents of the system clipboard.

This function returns the character position at x and y pixels from the top left of the textInput. Position 0 is before the first character, position 1 is after the first character but before the second, and so on until position text.length, which is after all characters.

This means that for all x values before the first character this function returns 0, and for all x values after the last character this function returns text.length. If the y value is above the text the position will be that of the nearest character on the first line and if it is below the text the position of the nearest character on the last line will be returned.

The cursor position parameter specifies how the cursor position should be resolved:

This function takes a character position pos and returns the rectangle that the cursor would occupy, if it was placed at that character position.

This is similar to setting the cursorPosition, and then querying the cursor rectangle, but the cursorPosition is not changed.

Redoes the last operation if redo is available.

Removes the section of text that is between the start and end positions from the TextInput.

Causes the text from start to end to be selected.

If either start or end is out of range, the selection is not changed.

After calling this, selectionStart will become the lesser and selectionEnd will become the greater (regardless of the order passed to this method).

See also selectionStart and selectionEnd.

Causes all text to be selected.

Causes the word closest to the current cursor position to be selected.

Undoes the last operation if undo is available. Deselects any current selection, and updates the selection start to the current cursor position.