Class AsyncTaskStage<T>

java.lang.Object

javafx.stage.Window

javafx.stage.Stage

cl.obcom.desktopfx.jfx.AsyncTaskStage<T>

Type Parameters:

T - the type of the result of the asynchronous task.

All Implemented Interfaces:

EventTarget

public final class AsyncTaskStage<T>
extends Stage

Modal Stage used to execute an asynchronous task.

The following code fragment demonstrates typical usage:

// Define callable to be executed asynchronously
Callable<Integer> callable = () -> computeResult();

// Create AsyncTaskStage to execute callable with owner and cancel button
AsyncTaskStage<Integer> asyncStage = new AsyncTaskStage<>(owner, true, callable);

// Display AsyncTaskStage, execute and obtain result
Integer result = asyncStage.showAndWaitForTaskValue();

Property Summary

Properties inherited from class Stage

alwaysOnTop, fullScreenExitHint, fullScreenExitKey, fullScreen, iconified, maxHeight, maximized, maxWidth, minHeight, minWidth, resizable, title

Properties inherited from class Window

eventDispatcher, focused, forceIntegerRenderScale, height, onCloseRequest, onHidden, onHiding, onShowing, onShown, opacity, outputScaleX, outputScaleY, renderScaleX, renderScaleY, scene, showing, width, x, y

Constructor Summary

Constructors

Constructor	Description
AsyncTaskStage(Object owner, boolean withCancel, Callable<T> callable)	Creates the new AsyncTaskStage with supplied callable.
AsyncTaskStage(Object owner, boolean withCancel, Task<T> task)	Creates the new AsyncTaskStage with supplied task.

Method Summary

Modifier and Type	Method	Description
T	showAndWaitForTaskValue()	Displays this modal stage and executes the asynchronous task.

Methods inherited from class Stage

alwaysOnTopProperty, close, fullScreenExitHintProperty, fullScreenExitKeyProperty, fullScreenProperty, getFullScreenExitHint, getFullScreenExitKeyCombination, getIcons, getMaxHeight, getMaxWidth, getMinHeight, getMinWidth, getModality, getOwner, getStyle, getTitle, iconifiedProperty, initModality, initOwner, initStyle, isAlwaysOnTop, isFullScreen, isIconified, isMaximized, isResizable, maxHeightProperty, maximizedProperty, maxWidthProperty, minHeightProperty, minWidthProperty, resizableProperty, setAlwaysOnTop, setFullScreen, setFullScreenExitHint, setFullScreenExitKeyCombination, setIconified, setMaxHeight, setMaximized, setMaxWidth, setMinHeight, setMinWidth, setResizable, setScene, setTitle, show, showAndWait, titleProperty, toBack, toFront

Methods inherited from class Window

addEventFilter, addEventHandler, buildEventDispatchChain, centerOnScreen, eventDispatcherProperty, fireEvent, focusedProperty, forceIntegerRenderScaleProperty, getEventDispatcher, getHeight, getOnCloseRequest, getOnHidden, getOnHiding, getOnShowing, getOnShown, getOpacity, getOutputScaleX, getOutputScaleY, getProperties, getRenderScaleX, getRenderScaleY, getScene, getUserData, getWidth, getWindows, getX, getY, hasProperties, heightProperty, hide, isFocused, isForceIntegerRenderScale, isShowing, onCloseRequestProperty, onHiddenProperty, onHidingProperty, onShowingProperty, onShownProperty, opacityProperty, outputScaleXProperty, outputScaleYProperty, removeEventFilter, removeEventHandler, renderScaleXProperty, renderScaleYProperty, requestFocus, sceneProperty, setEventDispatcher, setEventHandler, setForceIntegerRenderScale, setHeight, setOnCloseRequest, setOnHidden, setOnHiding, setOnShowing, setOnShown, setOpacity, setRenderScaleX, setRenderScaleY, setUserData, setWidth, setX, setY, showingProperty, sizeToScene, widthProperty, xProperty, yProperty

Methods inherited from class Object

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

Constructor Details

AsyncTaskStage

public AsyncTaskStage(Object owner,
 boolean withCancel,
 Callable<T> callable)

Creates the new AsyncTaskStage with supplied callable.

Argument owner can be a Node, a Scene, a Window or null. If owner is a Node then "node.getScene().getWindow()" will become the owner. If owner is a Scene then "scene.getWindow()" will become the owner. Finally, if owner is null then this AsyncTaskStage will become a top-level, unowned stage. See method Stage.initOwner(Window) for more detalis.

Parameters:

owner - the owner of this stage (can be null).

withCancel - if true display a cancel button.

callable - the callable to be executed asynchronously.

Throws:

NullPointerException - if callable is null.

AsyncTaskStage

public AsyncTaskStage(Object owner,
 boolean withCancel,
 Task<T> task)

Creates the new AsyncTaskStage with supplied task.

Argument owner can be a Node, a Scene, a Window or null. If owner is a Node then "node.getScene().getWindow()" will become the owner. If owner is a Scene then "scene.getWindow()" will become the owner. Finally, if owner is null then this AsyncTaskStage will become a top-level, unowned stage. See method Stage.initOwner(Window) for more detalis.

Parameters:

owner - the owner of this stage (can be null).

withCancel - if true display a cancel button.

task - the task to be executed asynchronously.

Throws:

NullPointerException - if task is null.

Method Details

showAndWaitForTaskValue

public T showAndWaitForTaskValue()
                          throws Exception

Displays this modal stage and executes the asynchronous task.

Returns:

the task result or null if the task was cancelled.

Throws:

Exception - if the asynchronous task completed with error.