Class ContextMenu
- javafx.stage.Window
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- javafx.stage.PopupWindow
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- javafx.scene.control.PopupControl
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- javafx.scene.control.ContextMenu
All Implemented Interfaces:
@IDProperty(value="id") public class ContextMenu extends PopupControl
A popup control containing an ObservableList of menu items. The items ObservableList allows for any MenuItem type to be inserted, including its subclasses Menu, MenuItem, RadioMenuItem, CheckMenuItem and CustomMenuItem. If an arbitrary Node needs to be inserted into a menu, a CustomMenuItem can be used. One exception to this general rule is that SeparatorMenuItem could be used for inserting a separator.
A common use case for this class is creating and showing context menus to users. To create a context menu using ContextMenu you can do the following:
final ContextMenu contextMenu = new ContextMenu();
contextMenu.setOnShowing(new EventHandler<WindowEvent>() {
public void handle(WindowEvent e) {
System.out.println("showing");
}
});
contextMenu.setOnShown(new EventHandler<WindowEvent>() {
public void handle(WindowEvent e) {
System.out.println("shown");
}
});
MenuItem item1 = new MenuItem("About");
item1.setOnAction(new EventHandler<ActionEvent>() {
public void handle(ActionEvent e) {
System.out.println("About");
}
});
MenuItem item2 = new MenuItem("Preferences");
item2.setOnAction(new EventHandler<ActionEvent>() {
public void handle(ActionEvent e) {
System.out.println("Preferences");
}
});
contextMenu.getItems().addAll(item1, item2);
final TextField textField = new TextField("Type Something");
textField.setContextMenu(contextMenu); Control.setContextMenu(javafx.scene.control.ContextMenu) convenience method can be used to set a context menu on on any control. The example above results in the context menu being displayed on the right Side of the TextField. Alternatively, an event handler can also be set on the control to invoke the context menu as shown below.
textField.setOnAction(new EventHandler<ActionEvent>() {
public void handle(ActionEvent e) {
contextMenu.show(textField, Side.BOTTOM, 0, 0);
}
});
Group root = (Group) scene.getRoot();
root.getChildren().add(textField); In this example, the context menu is shown when the user clicks on the Button (of course, you should use the MenuButton control to do this rather than doing the above).
Note that the show function used in the code sample above will result in the ContextMenu appearing directly beneath the TextField. You can vary the Side to get the results you expect.
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Property Summary
All MethodsInstance MethodsConcrete Methods Type Property and Description ObjectProperty<EventHandler<ActionEvent>>onActionCallback function to be informed when an item contained within thisContextMenuhas been activated.-
Properties inherited from class javafx.scene.control.PopupControl
id, maxHeight, maxWidth, minHeight, minWidth, prefHeight, prefWidth, skin, style
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Properties inherited from class javafx.stage.PopupWindow
anchorLocation, anchorX, anchorY, autoFix, autoHide, consumeAutoHidingEvents, hideOnEscape, onAutoHide, ownerNode, ownerWindow
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Nested Class Summary
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Nested classes/interfaces inherited from class javafx.scene.control.PopupControl
PopupControl.CSSBridge
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Nested classes/interfaces inherited from class javafx.stage.PopupWindow
PopupWindow.AnchorLocation
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Field Summary
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Fields inherited from class javafx.scene.control.PopupControl
bridge, USE_COMPUTED_SIZE, USE_PREF_SIZE
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Constructor Summary
Constructors Constructor and Description ContextMenu()Create a new ContextMenuContextMenu(MenuItem... items)Create a new ContextMenu initialized with the given items
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Method Summary
All MethodsInstance MethodsConcrete Methods Modifier and Type Method and Description protected Skin<?>createDefaultSkin()Create a new instance of the default skin for this control.ObservableList<MenuItem>getItems()The menu items on the context menu.EventHandler<ActionEvent>getOnAction()Gets the value of the property onAction.voidhide()Hides thisContextMenuand any visible submenus, assuming that when this function is called that theContextMenuwas showing.ObjectProperty<EventHandler<ActionEvent>>onActionProperty()Callback function to be informed when an item contained within thisContextMenuhas been activated.voidsetOnAction(EventHandler<ActionEvent> value)Sets the value of the property onAction.voidshow(Node anchor, double screenX, double screenY)Shows theContextMenuat the specified screen coordinates.voidshow(Node anchor, Side side, double dx, double dy)Shows theContextMenurelative to the given anchor node, on the side specified by thehposandvposparameters, and offset by the givendxanddyvalues for the x-axis and y-axis, respectively.-
Methods inherited from class javafx.scene.control.PopupControl
getClassCssMetaData, getCssMetaData, getId, getMaxHeight, getMaxWidth, getMinHeight, getMinWidth, getPrefHeight, getPrefWidth, getPseudoClassStates, getSkin, getStyle, getStyleableParent, getStyleClass, getTypeSelector, idProperty, maxHeight, maxHeightProperty, maxWidth, maxWidthProperty, minHeight, minHeightProperty, minWidth, minWidthProperty, prefHeight, prefHeightProperty, prefWidth, prefWidthProperty, pseudoClassStateChanged, setId, setMaxHeight, setMaxSize, setMaxWidth, setMinHeight, setMinSize, setMinWidth, setPrefHeight, setPrefSize, setPrefWidth, setSkin, setStyle, skinProperty, styleProperty
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Methods inherited from class javafx.stage.PopupWindow
anchorLocationProperty, anchorXProperty, anchorYProperty, autoFixProperty, autoHideProperty, consumeAutoHidingEventsProperty, getAnchorLocation, getAnchorX, getAnchorY, getConsumeAutoHidingEvents, getOnAutoHide, getOwnerNode, getOwnerWindow, hideOnEscapeProperty, isAutoFix, isAutoHide, isHideOnEscape, onAutoHideProperty, ownerNodeProperty, ownerWindowProperty, setAnchorLocation, setAnchorX, setAnchorY, setAutoFix, setAutoHide, setConsumeAutoHidingEvents, setHideOnEscape, setOnAutoHide, setScene, show, show
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Methods inherited from class javafx.stage.Window
addEventFilter, addEventHandler, buildEventDispatchChain, centerOnScreen, eventDispatcherProperty, fireEvent, focusedProperty, getEventDispatcher, getHeight, getOnCloseRequest, getOnHidden, getOnHiding, getOnShowing, getOnShown, getOpacity, getProperties, getScene, getUserData, getWidth, getX, getY, hasProperties, heightProperty, isFocused, isShowing, onCloseRequestProperty, onHiddenProperty, onHidingProperty, onShowingProperty, onShownProperty, opacityProperty, removeEventFilter, removeEventHandler, requestFocus, sceneProperty, setEventDispatcher, setEventHandler, setHeight, setOnCloseRequest, setOnHidden, setOnHiding, setOnShowing, setOnShown, setOpacity, setUserData, setWidth, setX, setY, show, showingProperty, sizeToScene, widthProperty, xProperty, yProperty
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Property Detail
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onAction
public final ObjectProperty<EventHandler<ActionEvent>> onActionProperty
Callback function to be informed when an item contained within thisContextMenuhas been activated. The current implementation informs all parent menus as well, so that it is not necessary to listen to all sub menus for events.See Also:
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Constructor Detail
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ContextMenu
public ContextMenu()
Create a new ContextMenu
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ContextMenu
public ContextMenu(MenuItem... items)
Create a new ContextMenu initialized with the given items
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Method Detail
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setOnAction
public final void setOnAction(EventHandler<ActionEvent> value)
Sets the value of the property onAction.Property description:
Callback function to be informed when an item contained within this
ContextMenuhas been activated. The current implementation informs all parent menus as well, so that it is not necessary to listen to all sub menus for events.
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getOnAction
public final EventHandler<ActionEvent> getOnAction()
Gets the value of the property onAction.Property description:
Callback function to be informed when an item contained within this
ContextMenuhas been activated. The current implementation informs all parent menus as well, so that it is not necessary to listen to all sub menus for events.
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onActionProperty
public final ObjectProperty<EventHandler<ActionEvent>> onActionProperty()
Callback function to be informed when an item contained within thisContextMenuhas been activated. The current implementation informs all parent menus as well, so that it is not necessary to listen to all sub menus for events.See Also:
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getItems
public final ObservableList<MenuItem> getItems()
The menu items on the context menu. If this ObservableList is modified at runtime, the ContextMenu will update as expected.See Also:
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show
public void show(Node anchor, Side side, double dx, double dy)Shows theContextMenurelative to the given anchor node, on the side specified by thehposandvposparameters, and offset by the givendxanddyvalues for the x-axis and y-axis, respectively. If there is not enough room, the menu is moved to the opposite side and the offset is not applied.To clarify the purpose of the
hposandvposparameters, consider that they are relative to the anchor node. As such, ahposandvposofCENTERwould mean that the ContextMenu appears on top of the anchor, with the (0,0) position of theContextMenupositioned at (0,0) of the anchor. Ahposof right would then shift theContextMenusuch that its top-left (0,0) position would be attached to the top-right position of the anchor.This function is useful for finely tuning the position of a menu, relative to the parent node to ensure close alignment.
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show
public void show(Node anchor, double screenX, double screenY)Shows theContextMenuat the specified screen coordinates. If there is not enough room at the specified location to show theContextMenugiven its size requirements, the necessary adjustments are made to bring theContextMenuback back on screen. This also means that theContextMenuwill not span multiple monitors.Overrides:
showin classPopupWindowParameters:
anchor- The owner Node of the popup. It must not be null and must be associated with a Window.
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hide
public void hide()
Hides thisContextMenuand any visible submenus, assuming that when this function is called that theContextMenuwas showing.If this
ContextMenuis not showing, then nothing happens.Overrides:
hidein classPopupWindow
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createDefaultSkin
protected Skin<?> createDefaultSkin()
Create a new instance of the default skin for this control. This is called to create a skin for the control if no skin is provided via CSS-fx-skinor set explicitly in a sub-class withsetSkin(...).Overrides:
createDefaultSkinin classPopupControlReturns:
new instance of default skin for this control. If null then the control will have no skin unless one is provided by css.
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