QgsFocusWatcher Class Reference

A event filter for watching for focus events on a parent object. More...

#include <qgsfocuswatcher.h>

Inheritance diagram for QgsFocusWatcher:

Signals
void	focusChanged (bool focused)
	Emitted when parent object's focus changes. More...
void	focusIn ()
	Emitted when parent object gains focus. More...
void	focusOut ()
	Emitted when parent object loses focus. More...

Public Member Functions
	QgsFocusWatcher (QObject *parent)
	Constructor for QgsFocusWatcher. More...
bool	eventFilter (QObject *obj, QEvent *event) override

Detailed Description

A event filter for watching for focus events on a parent object.

Usually QObjects must subclass and override methods like focusOutEvent to handle focus events. Using this class as an event filter avoids the need to subclass objects and the focus events can be directly caught using the emitted signals.

Since

QGIS 2.16

Definition at line 33 of file qgsfocuswatcher.h.

Constructor & Destructor Documentation

QgsFocusWatcher::QgsFocusWatcher ( QObject *  parent )

explicit

Constructor for QgsFocusWatcher.

Parameters

parent

parent widget to catch focus events for. This class will automatically be installed as an event filter for parent.

Definition at line 19 of file qgsfocuswatcher.cpp.

Member Function Documentation

bool QgsFocusWatcher::eventFilter ( QObject *  obj, QEvent *  event  )

override

Definition at line 26 of file qgsfocuswatcher.cpp.

void QgsFocusWatcher::focusChanged ( bool  focused )

signal

Emitted when parent object's focus changes.

Parameters

focused

true if object gained focus, false if object lost focus

void QgsFocusWatcher::focusIn ( )

signal

Emitted when parent object gains focus.

void QgsFocusWatcher::focusOut ( )

signal

Emitted when parent object loses focus.

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The documentation for this class was generated from the following files:

• /build/qgis-3.4.15+24xenial/src/gui/qgsfocuswatcher.h
• /build/qgis-3.4.15+24xenial/src/gui/qgsfocuswatcher.cpp