QInputMethod Class

The QInputMethod class provides access to the active text input method. More...

Header:	#include <QInputMethod>
qmake:	QT += gui
Inherits:	QObject

• List of all members, including inherited members

Public Types

enum	Action { Click, ContextMenu }

Properties

anchorRectangle : const QRectF animating : const bool cursorRectangle : const QRectF inputDirection : const Qt::LayoutDirection

inputItemClipRectangle : const QRectF keyboardRectangle : const QRectF locale : const QLocale visible : const bool

Public Functions

QRectF	anchorRectangle() const
QRectF	cursorRectangle() const
Qt::LayoutDirection	inputDirection() const
QRectF	inputItemClipRectangle() const
QRectF	inputItemRectangle() const
QTransform	inputItemTransform() const
bool	isAnimating() const
bool	isVisible() const
QRectF	keyboardRectangle() const
QLocale	locale() const
void	setInputItemRectangle(const QRectF &rect)
void	setInputItemTransform(const QTransform &transform)
void	setVisible(bool visible)

Public Slots

void	commit()
void	hide()
void	invokeAction(QInputMethod::Action a, int cursorPosition)
void	reset()
void	show()
void	update(Qt::InputMethodQueries queries)

Signals

void	anchorRectangleChanged()
void	animatingChanged()
void	cursorRectangleChanged()
void	inputDirectionChanged(Qt::LayoutDirection newDirection)
void	inputItemClipRectangleChanged()
void	keyboardRectangleChanged()
void	localeChanged()
void	visibleChanged()

Static Public Members

QVariant

queryFocusObject(Qt::InputMethodQuery query, QVariant argument)

Detailed Description

QInputMethod is used by the text editors for integrating to the platform text input methods and more commonly by application views for querying various text input method-related information like virtual keyboard visibility and keyboard dimensions.

Qt Quick also provides access to QInputMethod in QML through Qt global object as Qt.inputMethod property.

Member Type Documentation

enum QInputMethod::Action

Indicates the kind of action performed by the user.

Constant	Value	Description
QInputMethod::Click	0	A normal click/tap
QInputMethod::ContextMenu	1	A context menu click/tap (e.g. right-button or tap-and-hold)

See also invokeAction().

Member Function Documentation

[slot] void QInputMethod::commit()

Commits the word user is currently composing to the editor. The function is mostly needed by the input methods with text prediction features and by the methods where the script used for typing characters is different from the script that actually gets appended to the editor. Any kind of action that interrupts the text composing needs to flush the composing state by calling the commit() function, for example when the cursor is moved elsewhere.

[slot] void QInputMethod::hide()

Requests virtual keyboard to close.

Normally applications should not need to call this function, keyboard should automatically close when the text editor loses focus, for example when the parent view is closed.

[slot] void QInputMethod::invokeAction(QInputMethod::Action a, int cursorPosition)

Called by the input item when the word currently being composed is tapped by the user, as indicated by the action a and the given cursorPosition. Input methods often use this information to offer more word suggestions to the user.

[slot] void QInputMethod::reset()

Resets the input method state. For example, a text editor normally calls this method before inserting a text to make widget ready to accept a text.

Input method resets automatically when the focused editor changes.

[slot] void QInputMethod::show()

Requests virtual keyboard to open. If the platform doesn't provide virtual keyboard the visibility remains false.

Normally applications should not need to call this function, keyboard should automatically open when the text editor gains focus.

[slot] void QInputMethod::update(Qt::InputMethodQueries queries)

Called by the input item to inform the platform input methods when there has been state changes in editor's input method query attributes. When calling the function queries parameter has to be used to tell what has changes, which input method can use to make queries for attributes it's interested with QInputMethodQueryEvent.

In particular calling update whenever the cursor position changes is important as that often causes other query attributes like surrounding text and text selection to change as well. The attributes that often change together with cursor position have been grouped in Qt::ImQueryInput value for convenience.

QRectF QInputMethod::inputItemRectangle() const

Returns the input item's geometry in input item coordinates.

This function was introduced in Qt 5.1.

See also setInputItemRectangle().

QTransform QInputMethod::inputItemTransform() const

Returns the transformation from input item coordinates to the window coordinates.

See also setInputItemTransform().

[static] QVariant QInputMethod::queryFocusObject(Qt::InputMethodQuery query, QVariant argument)

Send query to the current focus object with parameters argument and return the result.

void QInputMethod::setInputItemRectangle(const QRectF &rect)

Sets the input item's geometry to be rect, in input item coordinates. This needs to be updated by the focused window like QQuickCanvas whenever item is moved inside the scene, or focus is changed.

This function was introduced in Qt 5.1.

See also inputItemRectangle().

void QInputMethod::setInputItemTransform(const QTransform &transform)

Sets the transformation from input item coordinates to window coordinates to be transform. Item transform needs to be updated by the focused window like QQuickCanvas whenever item is moved inside the scene.

See also inputItemTransform().

void QInputMethod::setVisible(bool visible)

Controls the keyboard visibility. Equivalent to calling show() (if visible is true) or hide() (if visible is false).

See also isVisible(), show(), and hide().