Class SubMenuUsabilityHelper

java.lang.Object

com.formdev.flatlaf.SubMenuUsabilityHelper

All Implemented Interfaces:

EventListener, ChangeListener

class SubMenuUsabilityHelper
extends Object
implements ChangeListener

Improves usability of submenus by using a safe triangle to avoid that the submenu closes while the user moves the mouse to it.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private class	SubMenuUsabilityHelper.SafeTrianglePainter
private class	SubMenuUsabilityHelper.SubMenuEventQueue

Field Summary

Fields

Modifier and Type	Field	Description
private boolean	changePending
private boolean	eventQueuePushNotSupported
private static SubMenuUsabilityHelper	instance
private Rectangle	invokerBounds
private static final String	KEY_SHOW_SAFE_TRIANGLE
private static final String	KEY_USE_SAFE_TRIANGLE
private int	mouseX
private int	mouseY
private SubMenuUsabilityHelper.SafeTrianglePainter	safeTrianglePainter
private SubMenuUsabilityHelper.SubMenuEventQueue	subMenuEventQueue
private int	targetBottomY
private int	targetTopY
private int	targetX

Constructor Summary

Constructors

Constructor	Description
SubMenuUsabilityHelper()

Method Summary

Modifier and Type	Method	Description
private Polygon	createSafeTriangle()
private int	findSubMenu(MenuElement[] path)
(package private) static boolean	install()
private void	menuSelectionChanged()
void	stateChanged(ChangeEvent e)
(package private) static void	uninstall()
private void	uninstallEventQueue()

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

KEY_USE_SAFE_TRIANGLE

private static final String KEY_USE_SAFE_TRIANGLE

See Also:

• Constant Field Values

KEY_SHOW_SAFE_TRIANGLE

private static final String KEY_SHOW_SAFE_TRIANGLE

See Also:

• Constant Field Values

instance

private static SubMenuUsabilityHelper instance

eventQueuePushNotSupported

private boolean eventQueuePushNotSupported

subMenuEventQueue

private SubMenuUsabilityHelper.SubMenuEventQueue subMenuEventQueue

safeTrianglePainter

private SubMenuUsabilityHelper.SafeTrianglePainter safeTrianglePainter

changePending

private boolean changePending

mouseX

private int mouseX

mouseY

private int mouseY

targetX

private int targetX

targetTopY

private int targetTopY

targetBottomY

private int targetBottomY

invokerBounds

private Rectangle invokerBounds

Constructor Details

SubMenuUsabilityHelper

SubMenuUsabilityHelper()

Method Details

install

static boolean install()

uninstall

static void uninstall()

stateChanged

public void stateChanged(ChangeEvent e)

Specified by:

stateChanged in interface ChangeListener

menuSelectionChanged

private void menuSelectionChanged()

uninstallEventQueue

private void uninstallEventQueue()

findSubMenu

private int findSubMenu(MenuElement[] path)

createSafeTriangle

private Polygon createSafeTriangle()