惠州JavaFX路径过渡是什么？_北大青鸟IT学校

JavaFX路径过渡是什么？最近惠州北大青鸟很多学员都在问这个问题，那么下面惠州北大青鸟学术部老师给大家解答一下这个问题。

路径过渡在一个给定时间内沿着从一端到另一端的路径移动节点。

/*
* Copyright (c) 2011, Pro JavaFX Authors
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright notice,
*    this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
*    this list of conditions and the following disclaimer in the documentation
*    and/or other materials provided with the distribution.
* 3. Neither the name of JFXtras nor the names of its contributors may be used
*    to endorse or promote products derived from this software without
*    specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* Metronome1Main.fx - A simple example of animation using a Timeline
*
*  Developed 2011 by James L. Weaver jim.weaver [at] javafxpert.com
*  as a JavaFX SDK 2.0 example for the Pro JavaFX book.
*///package projavafx.metronomepathtransition.ui;import javafx.animation.Animation;import javafx.animation.Interpolator;import javafx.animation.PathTransition;import javafx.animation.PathTransition.OrientationType;import javafx.animation.PathTransitionBuilder;import javafx.animation.Timeline;import javafx.application.Application;import javafx.event.ActionEvent;import javafx.event.EventHandler;import javafx.scene.GroupBuilder;import javafx.scene.Scene;import javafx.scene.SceneBuilder;import javafx.scene.control.Button;import javafx.scene.control.ButtonBuilder;import javafx.scene.layout.HBoxBuilder;import javafx.scene.paint.Color;import javafx.scene.shape.ArcToBuilder;import javafx.scene.shape.Ellipse;import javafx.scene.shape.EllipseBuilder;import javafx.scene.shape.MoveTo;import javafx.scene.shape.Path;import javafx.scene.shape.PathBuilder;import javafx.stage.Stage;import javafx.util.Duration;public class Main extends Application {
 Button startButton;
 Button pauseButton;
 Button resumeButton;
 Button stopButton;
 Ellipse ellipse = EllipseBuilder.create()
   .centerX(100)
   .centerY(50)
   .radiusX(4)
   .radiusY(8)
   .fill(Color.BLUE)
   .build();
 
 Path path = PathBuilder.create()
   .elements(      new MoveTo(100, 50),
     ArcToBuilder.create()
       .x(300)
       .y(50)
       .radiusX(350)
       .radiusY(350)
       .sweepFlag(true)
       .build()
   )
   .build();
 
 PathTransition anim = PathTransitionBuilder.create()
   .duration(new Duration(1000.0))
   .node(ellipse)
   .path(path)
   .orientation(OrientationType.ORTHOGONAL_TO_TANGENT)
   .interpolator(Interpolator.LINEAR)
   .autoReverse(true)
   .cycleCount(Timeline.INDEFINITE)
   .build();  
 public static void main(String[] args) {
   Application.launch(args);
 }
 
 @Override  public void start(Stage stage) {
   Scene scene  = SceneBuilder.create()
     .width(400)
     .height(500)
     .root(
       GroupBuilder.create()
         .children(
           ellipse,
           HBoxBuilder.create()
             .layoutX(60)
             .layoutY(420)
             .spacing(10)
             .children(
               startButton = ButtonBuilder.create()
                 .text("Start")
                 .onAction(new EventHandler<ActionEvent>() {
                   @Override public void handle(ActionEvent e) {
                     anim.playFromStart();
                   }
                 })
                 .build(),
               pauseButton = ButtonBuilder.create()
                 .text("Pause")
                 .onAction(new EventHandler<ActionEvent>() {
                   @Override public void handle(ActionEvent e) {
                     anim.pause();
                   }
                 })
                 .build(),
               resumeButton = ButtonBuilder.create()
                 .text("Resume")
                 .onAction(new EventHandler<ActionEvent>() {
                   @Override public void handle(ActionEvent e) {
                     anim.play();
                   }
                 })
                 .build(),
               stopButton = ButtonBuilder.create()
                 .text("Stop")
                 .onAction(new EventHandler<ActionEvent>() {
                   @Override public void handle(ActionEvent e) {
                     anim.stop();
                   }
                 })
                 .build()
             )
             .build()
         )
         .build()
     )
     .build();

   startButton.disableProperty().bind(anim.statusProperty()
           .isNotEqualTo(Animation.Status.STOPPED));
   pauseButton.disableProperty().bind(anim.statusProperty()
           .isNotEqualTo(Animation.Status.RUNNING));
   resumeButton.disableProperty().bind(anim.statusProperty()
           .isNotEqualTo(Animation.Status.PAUSED));
   stopButton.disableProperty().bind(anim.statusProperty()
           .isEqualTo(Animation.Status.STOPPED));
   
   stage.setScene(scene);
   stage.setTitle("Metronome using PathTransition");
   stage.show();
 }
}

上面的代码生成以下结果。

想学Java的同学们，可以来惠州北大青鸟新方舟校区详细了解。

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