Controls the order in which focus moves between components. More...
#include "juce_FocusTraverser.h"
Public Member Functions | |
| ~FocusTraverser () override=default | |
| Destructor. | |
| Component * | getDefaultComponent (Component *parentComponent) override |
| Returns the component that should receive focus by default within the given parent component. | |
| Component * | getNextComponent (Component *current) override |
| Returns the component that should be given focus after the specified one when moving "forwards". | |
| Component * | getPreviousComponent (Component *current) override |
| Returns the component that should be given focus after the specified one when moving "backwards". | |
| std::vector< Component * > | getAllComponents (Component *parentComponent) override |
| Returns all of the components that can receive focus within the given parent component in traversal order. | |
 Public Member Functions inherited from juce::ComponentTraverser | |
| virtual | ~ComponentTraverser ()=default |
| Destructor. | |
Detailed Description
Controls the order in which focus moves between components.
The algorithm used by this class to work out the order of traversal is as follows:
- Only visible and enabled components are considered focusable.
- If two components both have an explicit focus order specified then the one with the lowest number comes first (see the Component::setExplicitFocusOrder() method).
- Any component with an explicit focus order greater than 0 comes before ones that don't have an order specified.
- Components with their 'always on top' flag set come before those without.
- Any unspecified components are traversed in a left-to-right, then top-to-bottom order.
If you need focus traversal in a more customised way you can create a ComponentTraverser subclass that uses your own algorithm and return it from Component::createFocusTraverser().
@tags{GUI}
Definition at line 53 of file juce_FocusTraverser.h.
Member Function Documentation
◆ getAllComponents()
|
overridevirtual |
Returns all of the components that can receive focus within the given parent component in traversal order.
The default implementation will return all visible and enabled child components.
Implements juce::ComponentTraverser.
Definition at line 66 of file juce_FocusTraverser.cpp.
◆ getDefaultComponent()
|
overridevirtual |
Returns the component that should receive focus by default within the given parent component.
The default implementation will just return the foremost visible and enabled child component, and will return nullptr if there is no suitable component.
Implements juce::ComponentTraverser.
Definition at line 50 of file juce_FocusTraverser.cpp.
◆ getNextComponent()
Returns the component that should be given focus after the specified one when moving "forwards".
The default implementation will return the next visible and enabled component which is to the right of or below this one, and will return nullptr if there is no suitable component.
Implements juce::ComponentTraverser.
Definition at line 30 of file juce_FocusTraverser.cpp.
◆ getPreviousComponent()
Returns the component that should be given focus after the specified one when moving "backwards".
The default implementation will return the previous visible and enabled component which is to the left of or above this one, and will return nullptr if there is no suitable component.
Implements juce::ComponentTraverser.
Definition at line 40 of file juce_FocusTraverser.cpp.
The documentation for this class was generated from the following files:
- juce_gui_basics/components/juce_FocusTraverser.h
- juce_gui_basics/components/juce_FocusTraverser.cpp