java JavaFX | FlowPane 类

JavaFX | FlowPane 类

原文:https://www.geeksforgeeks.org/javafx-flowpane-class/

FlowPane 类是 JavaFX 的一部分。Flowpane 以在 flowpane 的边界处换行的方式布局其子代。水平的 flowpane(默认)将按行布局节点，按照 flowpane 的宽度换行。垂直的 flowpane 以列的形式排列节点，在 flowpane 的高度换行。FlowPane 类继承了 Pane 类。

类的构造函数:

流程窗格():创建新的水平流程窗格布局。
流程窗格(双 h，双 v) :创建新的水平流程窗格布局，具有指定的水平和垂直间隙。
流程窗格(双 h，双 v，节点… c) :创建一个新的水平流程窗格布局，具有指定的水平、垂直间隙和节点。
流程窗格(节点… c) :用指定的子节点创建流程窗格。
流程窗格(方向 o) :创建具有指定方向的流程窗格
流程窗格(方向 o，双 h，双 v) :创建具有指定方向和指定水平和垂直间隙的流程窗格。
流程窗格(方向 o，双 h，双 v，节点… c) :创建具有指定方向、指定水平和垂直间隙以及指定子级的流程窗格。
流程窗格(方向 o，节点… c) :创建具有指定方向和指定节点的流程窗格。

常用方法:

方法	说明
getAlignment()	返回窗格对齐的值。
getHgap()	返回流动窗格的水平间距。
getOrientation()	返回窗格的方向。
getRowValignment()	获取 rowValignment 属性的值。
getVgap()	返回流窗格的垂直间距。
设置对齐(位置 v)	设置窗格的对齐值。
setHgap(双 v)	设置流动窗格的水平间距。
设置方向(方向 o)	设置窗格的方向。
setRowValignment(双 v)	设置 rowValignment 属性的值。
setVgap(双 v)	设置流动窗格的垂直间距。

以下程序说明了流窗格类的使用:

Java Program to create a FlowPane, add labels to the flow pane and add it to the stage: In this program we will create a FlowPane and 5 Label named label, label1, label2, label3, label4. Add the labels to the flow_pane by passing it as the arguments. Set the FlowPane to the scene and add the scene to the stage. Call the show() function to display the final results.

```java // Java Program to create a FlowPane, // add labels to the flow pane // and add it to the stage import javafx.application.Application; import javafx.scene.Scene; import javafx.scene.control.; import javafx.scene.layout.; import javafx.stage.Stage; import javafx.event.ActionEvent; import javafx.event.EventHandler; import javafx.scene.canvas.; import javafx.scene.web.; import javafx.scene.layout.; import javafx.scene.shape.;

public class FlowPane_0 extends Application {

// launch the application     public void start(Stage stage)     {

try {

// set title for the stage             stage.setTitle("FlowPane");

// create a labels             Label label = new Label("this is FlowPane example");             Label label1 = new Label("label no 1");             Label label2 = new Label("label no 2");             Label label3 = new Label("label no 3");             Label label4 = new Label("label no 4");

// create a FlowPane             FlowPane flow_pane = new FlowPane(20.0, 20.0, label, label1,                                                 label2, label3, label4);

// create a scene             Scene scene = new Scene(flow_pane, 400, 300);

// set the scene             stage.setScene(scene);

stage.show();         }

catch (Exception e) {

System.out.println(e.getMessage());         }     }

// Main Method     public static void main(String args[])     {

// launch the application         launch(args);     } } ```

输出:
Java Program to create a FlowPane set its orientation, add labels and buttons and add it to the stage: In this program we will create a FlowPane and a Label named label. Add the label to the flow_pane by passing it through the argument, orientation and the hgap, and vgap values. Add the buttons using getChildren().add(). Set the FlowPane to the scene. Add the scene to the stage. Call the show() function to display the final results.

```java // Java Program to create a FlowPane // set its orientation, add labels // and buttons and add it to the stage import javafx.application.Application; import javafx.scene.Scene; import javafx.scene.control.; import javafx.scene.layout.; import javafx.stage.Stage; import javafx.event.ActionEvent; import javafx.geometry.; import javafx.scene.canvas.; import javafx.scene.web.; import javafx.scene.layout.; import javafx.scene.shape.*;

public class FlowPane_1 extends Application {

// launch the application public void start(Stage stage) {

try {

// set title for the stage         stage.setTitle("FlowPane");

// create a label         Label label = new Label("this is FlowPane example");

// create a FlowPane         FlowPane flow_pane = new FlowPane(Orientation.VERTICAL,                                             20.0, 20.0, label);

// add buttons         for (int i = 0; i < 10; i++) {

// add nodes to the flow pane             flow_pane.getChildren().add(new Button("Button "                                             + (int)(i + 1)));         }

// create a scene         Scene scene = new Scene(flow_pane, 400, 300);

// set the scene         stage.setScene(scene);

stage.show();     }

catch (Exception e) {

System.out.println(e.getMessage());     } }

// Main Method public static void main(String args[]) {

// launch the application     launch(args); } } ```

输出:
Java Program to create a FlowPane set its orientation, add labels and buttons, set the alignment, column alignment, row alignment of the FlowPane and add it to the stage: In this program we will create a FlowPane and a Label named label. Add the label to the flow_pane by passing it through the argument, orientation, and the hgap, and vgap values. Now add the buttons using getChildren().add(). Set the FlowPane to the scene. Set the alignment of the FlowPane using functions using setAlignment(), setColumnHalignment(), setRowValignment(). Add the scene to the stage. Call the show() function to display the final results.

```java // Java Program to create a FlowPane set its orientation, // add labels and buttons, set the alignment, column // alignment, row alignment of the FlowPane and add it // to the stage import javafx.application.Application; import javafx.scene.Scene; import javafx.scene.control.; import javafx.scene.layout.; import javafx.stage.Stage; import javafx.event.ActionEvent; import javafx.geometry.; import javafx.scene.canvas.; import javafx.scene.web.; import javafx.scene.layout.; import javafx.scene.shape.*;

public class FlowPane_2 extends Application {

// launch the application public void start(Stage stage) {

try {

// set title for the stage         stage.setTitle("FlowPane");

// create a label         Label label = new Label("this is FlowPane example");

// create a FlowPane         FlowPane flow_pane = new FlowPane(Orientation.VERTICAL,                                             20.0, 20.0, label);

// add buttons         for (int i = 0; i < 10; i++) {             // add nodes to the flow pane             flow_pane.getChildren().add(new Button("Button "                                            + (int)(i + 1)));         }

// set alignment of flow pane         flow_pane.setAlignment(Pos.CENTER);         flow_pane.setColumnHalignment(HPos.CENTER);         flow_pane.setRowValignment(VPos.CENTER);

// create a scene         Scene scene = new Scene(flow_pane, 400, 300);

// set the scene         stage.setScene(scene);

stage.show();     }

catch (Exception e) {

System.out.println(e.getMessage());     } }

// Main Method public static void main(String args[]) {

// launch the application     launch(args); } } ```

输出: