java JavaFX | ColorInput 类

JavaFX | ColorInput 类

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

ColorInput 类是 JavaFX 的一部分。它用于创建一个效果，渲染一个矩形区域，填充给定的颜色。这相当于将一个填充的矩形渲染到图像中，并使用 ImageInput 效果，只是它更方便，而且效率可能更高。它主要作为输入传递到其他效果中。

类的构造函数:

颜色输入():使用默认参数创建颜色输入的新实例。
ColorInput(双 x，双 y，双宽度，双高度，Paint paint) :使用指定的 x，y，宽度，高度和 Paint 创建 ColorInput 的新实例。

常用方法:

方法	描述
getX（）	获取属性 x 的值。
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盖蒂（）	获取属性 y 的值。
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设置高度(双精度值)	设置属性高度的值
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设定油漆(油漆值)	设置属性绘制的值。
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设置宽度(双精度值)	设置属性宽度的值。
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setX(双值)	设置属性 x 的值。
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setY(双数值)	设置属性 y 的值。
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getHeight（）	获取属性高度的值。
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getPaint()	获取属性 paint 的值。
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getWidth（）	获取属性宽度的值
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Java program to Demonstrate ColorInput class: In this program, ColorInput Effect is created and then we set the color, height, width, and coordinates of the region of ColorInput. A group object and scene object is created. A scene is added to the stage and then we set the title of the stage.

```java // Java program to Demonstrate ColorInput class import javafx.application.Application; import javafx.scene.Group; import javafx.scene.Scene; import javafx.scene.effect.ColorInput; import javafx.scene.paint.Color; import javafx.scene.shape.Rectangle; import javafx.stage.Stage;

public class ColorInputDemo extends Application {

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

// launch the application         launch(args);     }

// launch the application     public void start(Stage primaryStage) throws Exception     {

// Instantiating the ColorInput class         ColorInput color = new ColorInput();

// set the color         color.setPaint(Color.GREEN);

// sets the height of the region of color input         color.setHeight(50);

// sets the width of the region of color input         color.setWidth(200);

// set the coordinates of the Colorinput         color.setX(90);         color.setY(140);

// create a rectangle         Rectangle rect = new Rectangle();

// applying coloradjust effect         rect.setEffect(color);

// create a group object         Group root = new Group();

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

root.getChildren().add(rect);

// adding scene to the stage         primaryStage.setScene(scene);

// set title of the stage         primaryStage.setTitle("ColorInput Demo");

primaryStage.show();     } } ```

输出:
Java program to apply ColorInput class to the created rectangle by clicking on the button using EventHandler: In this program, we first set the Height, Width, and coordinates of a rectangle and then create a rectangle of the same dimension. Now, create a Button and set the Layouts of the Button. Now, using EventHandler, first, instantiate a ColorInput class using proper dimension and then set ColorInput Effect to the Button. Create a group object and add Button and rectangle to it. Then Create a Scene and add it to the stage.

```java // Java program to apply ColorInput class to // the created rectangle by clicking on the // button using EventHandler import javafx.application.Application; import javafx.event.ActionEvent; import javafx.event.EventHandler; import javafx.scene.Group; import javafx.scene.Scene; import javafx.scene.control.Button; import javafx.scene.effect.ColorInput; import javafx.scene.paint.Color; import javafx.scene.shape.Rectangle; import javafx.stage.Stage;

public class ColorInputExample extends Application {

public void start(Stage stage)     {

double x = 10;         double y = 10;         double w = 40;         double h = 180;

// Rectangle         Rectangle rect = new Rectangle(x, y, w, h);         rect.setFill(Color.WHITE);         rect.setStrokeWidth(1);         rect.setStroke(Color.BLACK);

// Button         Button button = new Button("Click To See the Effects!");

// set button layout coordinates         button.setLayoutX(100);         button.setLayoutY(30);

button.setPrefSize(250, 150);

button.setOnAction(new EventHandler() {

public void handle(ActionEvent event)             {                 // instantiating the colorinput class                 ColorInput colorInput = new ColorInput(x, y,                                      w, h, Color.STEELBLUE);

// Setting ColorInput effect                 button.setEffect(colorInput);             }         });

// create the Group object         Group root = new Group();

root.getChildren().addAll(button, rect);

Scene scene = new Scene(root, 450, 300);         stage.setTitle("JavaFX ColorInput Effect");         stage.setScene(scene);

stage.show();     }

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

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

输出:

https://media.geeksforgeeks.org/wp-content/uploads/ColorInput.mp4