JavaFXのマウスホイールでズームする

Question

マウスホイールをズームしようとしています。拡大ズーム機能は完璧に機能します。しかし、私が小さくスクロールすると、無期限に縮むことはありません。それは、ペインが特定のサイズに達した後、縮小しないことを意味します。ここに私の方法は次のとおりです。

package application; 

import javafx.application.Application; 
import javafx.beans.InvalidationListener; 
import javafx.beans.Observable; 
import javafx.beans.property.DoubleProperty; 
import javafx.beans.property.SimpleDoubleProperty; 
import javafx.event.EventHandler; 
import javafx.scene.Group; 
import javafx.scene.Scene; 
import javafx.scene.control.Button; 
import javafx.scene.control.ScrollPane; 
import javafx.scene.image.Image; 
import javafx.scene.image.ImageView; 
import javafx.scene.input.ScrollEvent; 
import javafx.scene.layout.BorderPane; 
import javafx.scene.layout.Pane; 
import javafx.scene.shape.SVGPath; 
import javafx.scene.transform.Affine; 
import javafx.stage.Stage; 


public class fab extends Application { 



private Stage stage; 
private Pane pane; 
private BorderPane borderPane; 
private Scene scene; 
private Affine affine = new Affine(); 
private ScrollPane scrollPane; 

private String coords = "M545.296,92.562c-1.399-1.758-2.823-3.852-4.732-4.777c-8.87-4.309-17.83-8.47-26.933-12.256 c-4.268-1.775-7.49-4.035-8.735-8.65c-0.269-1-0.755-2.084-1.473-2.799c-4.492-4.455-4.533-4.447,0.808-7.854 c0.698-0.445,1.567-0.624,1.73-0.685c-0.412-2.179-0.637-3.901-1.102-5.557c-0.225-0.804-0.755-1.681-1.408-2.179 c-3.211-2.419-7.021-4.264-9.629-7.193c-2.566-2.885-5.186-2.742-8.307-2.448c-1.044,0.098-2.513,0.13-3.146-0.473 c-3.672-3.55-8.731-1.82-13.031-3.321c-3.75-1.31-8.928,1.493-13.477,2.448c-0.633,0.13-1.399,0.293-1.946,0.065 c-7.797-3.284-14.378-1.281-19.689,4.859c-0.262,1.359-0.625,2.905-1.596,3.66c-3.696,2.864-7.854,5.182-11.326,8.274 c-2.424,2.158-4.981,5.01-5.708,7.984c-0.73,2.995-2.171,4.023-4.521,4.77c-2.529,0.8-4.859,1.579-4.949,4.953 c-0.024,0.841-1.562,1.55-1.885,2.497c-0.682,1.995-1.098,4.096-1.473,6.177c-0.208,1.154,0.253,2.554-0.241,3.505 c-1.758,3.415-3.888,6.638-5.699,10.024c-1.588,2.958-4.48,6.328-3.995,9.004c0.588,3.231-0.216,6.389,0.531,9.335 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@Override 
public void start(Stage stage) throws Exception { 

    this.stage = stage; 

    Button button = new Button("Button"); 

    pane = new Pane(); 
    pane.getChildren().add(button); 


    borderPane = new BorderPane(); 
    stage.setTitle("Circle"); 

    scrollPane = new ScrollPane(new Group(pane)); 
    borderPane.setCenter(scrollPane); 

    SVGPath camel = new SVGPath(); 
    camel.setContent(coords);  
    pane.getChildren().add(camel); 

    pane.getTransforms().add(affine); 


    scene = new Scene(borderPane, 640, 640); 
    this.zoom(pane); 
    stage.setScene(scene); 
    stage.show(); 

} 

public void zoom(Pane pane) { 
    pane.setOnScroll(
     new EventHandler<ScrollEvent>() { 
      @Override 
      public void handle(ScrollEvent event) { 
       double zoomFactor = 1.05; 
       double deltaY = event.getDeltaY(); 

       if (deltaY < 0){ 
        zoomFactor = 0.95; 
       } 
       pane.setScaleX(pane.getScaleX() * zoomFactor); 
       pane.setScaleY(pane.getScaleY() * zoomFactor); 
       event.consume(); 
      } 
     }); 

} 

public static void main(String[] args) { 
    launch(args); 
} 

}

あなたは私が間違っているのものを私に説明できますか？

形状がペインにあります。ペインが元のサイズの約25％に達すると、ズーム機能が機能しなくなり、理由がわかりません。

Answer 1

あなたの問題は単純だが欺いているようです。私はあなたのコードに行

pane.setBackground(new Background(new BackgroundFill(Color.AQUAMARINE, null, null))); 

を追加し、今ではすべてが明らかにされる必要があります。

をしかし、私は小さいスクロールするとき、それはindefinitly縮小しません。

あなたが推測したところでは、マウスがパネル上になくなるまでマウスクリックを聞くように登録されているパネルを縮小しているため、ズームが停止します。

修正は簡単です - ではなく、パネルのイベントをリッスンするシーンを登録します。

scene.setOnScroll(new EventHandler<ScrollEvent>() { /*...*/ }); 

私は生産段階の間に別のanswer、着色成分で述べたように、本当にこれらのことに役立ちます。