本文介绍了JavaFX Circle和ImageView的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我需要使用javaFX2来执行以下操作：
I need to use javaFX2 to do the following:
1-）加载图像并使用imageView显示它。 [确定]
1-) Load an image and display it using imageView. [OK]
2-）右键单击并选择添加节点选项，屏幕上会出现一个黑色圆圈，您可以将圆圈拖动到图像的任何位置。 [确定]
2-) Right click and choose the "Add Node" option and a black circle will appear in the screen and you can Drag the circle to any place of the image. [OK]
3-）使用鼠标滚轮向上或向下缩放imageView，给出Zoom Sensation图片。 [确定]
3-) Use the scroll wheel fo the mouse to scale up or down the imageView, giving the "Zoom Sensation" on the image. [OK]
3.1-）但是，每次缩放图像时，我希望我的圆圈遵循比例尺，意味着他们无法保持在屏幕的相同位置。 [不知道]
3.1-) However, every time I scale the image I want my circles to follow the scale proportion, which means they cant stay in the same position of the screen. [Have no Idea]
我的问题是项目编号3.1，因为我不知道如何移动我的圈子在我放大或缩小后，它们可以看起来像是在图像的位置。
我试图使用setCenterX（）和setCenterY（）方法，以及过渡方法，但我找不到办法做到这一点。
My proble is the item number 3.1, because I dont know how to move my circles in the image in a way that they can appear to be in the place of the image after I scale up or down.I tried to use the setCenterX() and setCenterY() methods, and also the transition methods too but I couldnt find a way to do this.
代码加载我的图片：
@FXML
ImageView bluePrintView;
@FXML
private void loadBtnAction(ActionEvent event) {
FileChooser fileChooser = new FileChooser();
//Show open file dialog
File file = fileChooser.showOpenDialog(null);
/*Load Image*/
System.out.println(file.getPath());
Image img = new Image("file:" + file.getPath());
bluePrintView.setImage(img);
bluePrintView.setFitHeight(scrollPaneImage.getHeight());
bluePrintView.setFitWidth(scrollPaneImage.getWidth());
bluePrintView.setSmooth(true);
bluePrintView.setScaleX(1);
bluePrintView.setScaleY(1);
event.consume();
}
扩展ImageView的代码：
Code to Scale the ImageView:
@FXML
private void zoomAction(ScrollEvent event) {
if (event.getDeltaY() < 0) {
if (bluePrintView.getScaleX() > 0.8 && bluePrintView.getScaleY() > 0.8) {
bluePrintView.setScaleX(bluePrintView.getScaleX() - 0.1);
bluePrintView.setScaleY(bluePrintView.getScaleY() - 0.1);
System.out.println("ImageView(X,Y): "+bluePrintView.getFitHeight()+" "+bluePrintView.getFitWidth());
System.out.println("Image(X,Y): "+bluePrintView.getImage().getHeight()+" "+bluePrintView.getImage().getWidth());
if (!nodeList.isEmpty()) {
for (int i = 0; i < nodeList.size(); i++) {
nodeList.get(i).zoomOutNode(bluePrintView.getFitHeight(),bluePrintView.getFitWidth());
}
}
}
} else {
bluePrintView.setScaleX(bluePrintView.getScaleX() + 0.1);
bluePrintView.setScaleY(bluePrintView.getScaleY() + 0.1);
System.out.println("ImageView(X,Y): "+bluePrintView.getFitHeight()+" "+bluePrintView.getFitWidth());
System.out.println("Image(X,Y): "+bluePrintView.getImage().getHeight()+" "+bluePrintView.getImage().getWidth());
if (!nodeList.isEmpty()) {
for (int i = 0; i < nodeList.size(); i++) {
nodeList.get(i).zoomInNode(bluePrintView.getFitHeight(),bluePrintView.getFitWidth());
}
}
}
event.consume();
}
创建Circle的代码并执行一些操作：
Code to Create Circle and do some operations:
public class NodeShape {
final Circle node = new Circle();
double axisX = 0, axisY = 0;
public Circle createNode(Group rootGroup, double axisX, double axisY, double radius, String color) {
node.setCenterX(axisX);
node.setCenterY(axisY);
node.setRadius(radius);
node.fillProperty().setValue(Paint.valueOf(color));
System.out.println(node.getTranslateX() + " " + node.getTranslateY());
System.out.println("getCenter: " + node.getCenterX() + " " + node.getCenterY());
rootGroup.getChildren().add(node);
node.setOnMouseDragged(new EventHandler<MouseEvent>() {
@Override
public void handle(MouseEvent t) {
node.setCenterX(t.getX());
node.setCenterY(t.getY());
NodeShape.this.axisX = t.getX();
NodeShape.this.axisY = t.getY();
System.out.println("Circle getTranslate: " + node.getTranslateX() + " " + node.getTranslateY());
System.out.println("Circle getCenter: " + node.getCenterX() + " " + node.getCenterY());
t.consume();
}
});
node.setOnMouseClicked(new EventHandler<MouseEvent>() {
@Override
public void handle(MouseEvent t) {
if (t.getButton().equals(MouseButton.PRIMARY)) {
if (t.getClickCount() == 2) {
node.setVisible(false);
node.setDisable(true);
}else if(t.getClickCount() == 1){
System.out.println("Circle Position: "+node.getCenterX()+" "+node.getCenterY());
}
}
t.consume();
}
});
node.setOnScroll(new EventHandler<ScrollEvent>() {
@Override
public void handle(ScrollEvent t) {
if (t.getDeltaY() < 0) {
if (node.getScaleX() > 0.8 && node.getScaleY() > 0.8) {
node.setScaleX(node.getScaleX() - 0.1);
node.setScaleY(node.getScaleY() - 0.1);
}
} else {
node.setScaleX(node.getScaleX() + 0.1);
node.setScaleY(node.getScaleY() + 0.1);
}
t.consume();
}
});
return node;
}
public void zoomInNode(double imgHeight, double imgWidth) {
node.setCenterX(0.1);
//node.setTranslateY(imgHeight/1100 + 10);
//node.setCenterX(node.getCenterX() + Math.abs(axisX - node.getRadius()));
//node.setCenterY(node.getCenterY() + Math.abs(axisY - node.getRadius()));
System.out.println("Circle getCenter: " + node.getCenterX() + " " + node.getCenterY());
System.out.println("Circle getCenter: " + node.getTranslateX()+ " " + node.getTranslateY());
}
public void zoomOutNode(double imgHeight, double imgWidth) {
node.setCenterX(-0.1);
// node.setTranslateY(imgHeight/200 - 10);
//node.setCenterX(node.getCenterX() - Math.abs(axisX - node.getRadius()));
//node.setCenterY(node.getCenterY() - Math.abs(axisY - node.getRadius()));
System.out.println("Circle getCenter: " + node.getCenterX() + " " + node.getCenterY());
System.out.println("Circle getCenter: " + node.getTranslateX()+ " " + node.getTranslateY());
}
public void zoomResetNode() {
node.setCenterX(axisX);
node.setCenterY(axisY);
}}
我的FXML文件代码：
My FXML file code:
<?xml version="1.0" encoding="UTF-8"?>
<?import java.lang.*?>
<?import java.util.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.image.*?>
<?import javafx.scene.layout.*?>
<AnchorPane id="AnchorPane" fx:id="rootPane" pickOnBounds="true" prefHeight="420.0" prefWidth="817.0" snapToPixel="true" xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/2.2" fx:controller="blueprints.NewSonarViewController">
<children>
<Group id="Group" layoutX="0.0" layoutY="0.0">
<children>
<ScrollPane fx:id="scrollPaneImage" layoutX="0.0" layoutY="0.0" prefHeight="420.0" prefWidth="817.0">
<content>
<Group id="Group" fx:id="rootGroup">
<children>
<ImageView fx:id="bluePrintView" cache="false" fitHeight="419.0" fitWidth="816.0" layoutX="0.0" layoutY="0.0" onMouseClicked="#zoomResetAction" onScroll="#zoomAction" pickOnBounds="true" preserveRatio="false" rotate="0.0" visible="true" />
</children>
</Group>
</content>
<contextMenu>
<ContextMenu>
<items>
<MenuItem mnemonicParsing="false" onAction="#loadBtnAction" text="Load Image" />
<MenuItem mnemonicParsing="false" onAction="#addSynk" text="Add Synk" />
<MenuItem mnemonicParsing="false" onAction="#addNode" text="AddNode" />
</items>
</ContextMenu>
</contextMenu>
</ScrollPane>
</children>
</Group>
</children>
</AnchorPane>
推荐答案
我的想法是你添加 ImageView 和 Circle 到你的 rootGroup ，然后在 rootGroup 。请参阅下面的示例。
My idea is that you add the ImageView and the Circle to your rootGroup and then apply the scale on the rootGroup. See my example below.
视图：
<AnchorPane id="AnchorPane" fx:id="rootPane" pickOnBounds="true" prefHeight="420.0" prefWidth="817.0" snapToPixel="true" xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/2.2" fx:controller="javafx.scale.Controller">
<children>
<Group id="Group" layoutX="0.0" layoutY="0.0" onScroll="#scrolling">
<children>
<ScrollPane fx:id="scrollPaneImage" layoutX="0.0" layoutY="0.0" prefHeight="420.0" prefWidth="817.0">
<content>
<Group id="Group" fx:id="rootGroup">
</Group>
</content>
</ScrollPane>
</children>
</Group>
</children>
</AnchorPane>
管制员：
public class Controller {
@FXML
private Group rootGroup;
private Group zoomGroup;
private double scale = 1;
public void initialize() {
zoomGroup = new Group();
Image image = new Image(getClass().getResourceAsStream("image.jpg"));
ImageView imageView = new ImageView(image);
imageView.setX(50);
imageView.setY(50);
Circle circle = new Circle();
circle.setRadius(20);
circle.setCenterX(100);
circle.setCenterY(200);
circle.setFill(Paint.valueOf("RED"));
zoomGroup.getChildren().add(imageView);
zoomGroup.getChildren().add(circle);
rootGroup.getChildren().add(zoomGroup);
}
public void scrolling(ScrollEvent scrollEvent) {
if (scrollEvent.getDeltaY() > 0) {
scale += 0.1;
} else if (scrollEvent.getDeltaY() < 0) {
scale -= 0.1;
}
zoomGroup.setScaleX(scale);
zoomGroup.setScaleY(scale);
}
}
这篇关于JavaFX Circle和ImageView的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！