mppa

Class SceneGestures

java.lang.Object

mppa.SceneGestures

class SceneGestures
extends java.lang.Object

Listeners for making the scene's canvas draggable and zoomable

Field Summary

Fields

Modifier and Type	Field and Description
(package private) ViewCanvas	canvas canvas
private static double	MAX_SCALE Maximum size of mouse zoom.
private static double	MIN_SCALE Minimal size of mouse zoom.
private javafx.event.EventHandler<javafx.scene.input.MouseEvent>	onMouseDraggedEventHandler Called when mouse is pressed and dragged.
private javafx.event.EventHandler<javafx.scene.input.MouseEvent>	onMousePressedEventHandler Called when mouse is pressed.
private javafx.event.EventHandler<javafx.scene.input.ScrollEvent>	onScrollEventHandler Called when mouse is scrolled.
private DragContext	sceneDragContext Mouse dragging information.

Constructor Summary

Constructors

Constructor and Description
SceneGestures(ViewCanvas canvas) Constructor.

Method Summary

Modifier and Type	Method and Description
static double	clamp(double value, double min, double max) Function for clamping to a value.
javafx.event.EventHandler<javafx.scene.input.MouseEvent>	getOnMouseDraggedEventHandler() Returns mouse dragged event handler.
javafx.event.EventHandler<javafx.scene.input.MouseEvent>	getOnMousePressedEventHandler() Returns mouse pressed event handler.
javafx.event.EventHandler<javafx.scene.input.ScrollEvent>	getOnScrollEventHandler() Returns scrolled event handler.

Methods inherited from class java.lang.Object

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

Field Detail

MAX_SCALE

private static final double MAX_SCALE

Maximum size of mouse zoom.

See Also:

Constant Field Values

MIN_SCALE

private static final double MIN_SCALE

Minimal size of mouse zoom.

See Also:

Constant Field Values

sceneDragContext

private DragContext sceneDragContext

Mouse dragging information.

canvas

ViewCanvas canvas

canvas

onMousePressedEventHandler

private javafx.event.EventHandler<javafx.scene.input.MouseEvent> onMousePressedEventHandler

Called when mouse is pressed.

onMouseDraggedEventHandler

private javafx.event.EventHandler<javafx.scene.input.MouseEvent> onMouseDraggedEventHandler

Called when mouse is pressed and dragged.

onScrollEventHandler

private javafx.event.EventHandler<javafx.scene.input.ScrollEvent> onScrollEventHandler

Called when mouse is scrolled. Zooms graphics in or out.

Constructor Detail

SceneGestures

public SceneGestures(ViewCanvas canvas)

Constructor.

Parameters:

canvas - Canvas.

Method Detail

getOnMousePressedEventHandler

public javafx.event.EventHandler<javafx.scene.input.MouseEvent> getOnMousePressedEventHandler()

Returns mouse pressed event handler.

Returns:

Mouse pressed event handler.

getOnMouseDraggedEventHandler

public javafx.event.EventHandler<javafx.scene.input.MouseEvent> getOnMouseDraggedEventHandler()

Returns mouse dragged event handler.

Returns:

Mouse dragged event handler.

getOnScrollEventHandler

public javafx.event.EventHandler<javafx.scene.input.ScrollEvent> getOnScrollEventHandler()

Returns scrolled event handler.

Returns:

Mouse scrolled event handler.

clamp

public static double clamp(double value,
                           double min,
                           double max)

Function for clamping to a value.

Parameters:

value - Value.

min - Minimal scale.

max - Maximum scale.

Returns:

Clamped value.