java JavaFX | DropShadow 类

JavaFX | DropShadow 类

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

DropShadow 类是 JavaFX 的一部分。DropShadow 类创建一个高级效果，以指定的半径、扩散、模糊类型和偏移量呈现内容后面的对象的阴影。DropShadow 类继承效果类。

类的构造函数:

DropShadow() :创建 DropShadow 的新对象。
DropShadow(BlurType blurType，Color color，double radius，double spread，double offsetX，double offsetY) :用指定的值 BlurType，radius，spread，offsetX，offsetY 创建 DropShadow 的新对象。
DropShadow(双半径，颜色颜色):用指定的半径和颜色值创建 DropShadow 的新对象。
DropShadow(双半径，双偏移，双偏移，颜色):用指定的半径，偏移，偏移和颜色值创建 DropShadow 的新对象。

常用方法:

方法	说明
getBlurType()	返回效果的模糊类型。
获得颜色（）	返回效果的颜色。
getInput()	返回属性输入的值。
跟踪半径()	返回 dropShadow 效果的半径。
设置模糊类型(模糊类型 v)	设置 dropShadow 效果的模糊类型。
setColor(颜色 v)	设置阴影效果的颜色。
设置输入(效果五)	设置属性输入的值。
setRadius(双 v)	设置阴影效果的半径。
setoffsetx(双 v)	设置 offsetX 的值。
setffsety(double v)	设置偏移量的值。
getOffsetX()	返回 offsetX 的值。
getoffsection()	返回偏移量的值。
getSpread()	返回投影效果的扩散值。
setSpread(双 v)	设置投影效果的扩散值。

下面的程序说明了 DropShadow 类的使用:

Java program to create a Circle and add DropShadow effect to it: In this program we will create a Circle named circle and create a DropShadow effect drop_shadow with specified radius and color. The DropShadow effect will be added to the circle using the setEffect() function and the circle will be added to the group. The circles will be translated to specific position in the stage using setTranslateX() and setTranslateY() function. The group will be added to the scene and the scene will be added to the stage.

```java // Java program to create a Circle and // add DropShadow effect to it import javafx.application.Application; import javafx.scene.Scene; import javafx.scene.control.; import javafx.scene.layout.; import javafx.stage.Stage; import javafx.scene.image.; import javafx.scene.effect.; import java.io.*; import javafx.scene.shape.Circle; import javafx.scene.paint.Color; import javafx.scene.Group;

public class drop_shadow_1 extends Application {

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

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

// create a circle         Circle circle = new Circle(50.0f, 50.0f, 25.0f);

// set fill for circle         circle.setFill(Color.BLUE);

// translate to a position         circle.setTranslateX(50.0f);         circle.setTranslateY(50.0f);

// create a drop_shadow effect         DropShadow drop_shadow = new DropShadow(10, Color.RED);

// set effect         circle.setEffect(drop_shadow);

// create a Group         Group group = new Group(circle);

// create a scene         Scene scene = new Scene(group, 200, 200);

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

stage.show();     }

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

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

输出:
Java program to create four Circles and add DropShadow effect to it, which are of different blur types and different values of offsetX, offsetY and radius: In this program we will create Circles named circle, circle1, circle2, circle3 and create a DropShadow effects named drop_shadow1, drop_shadow2, drop_shadow3, drop_shadow4 with specified radius, color, offsetX, offsetY, spread and blur type. The DropShadow effect will be added to the circle using the setEffect() function and the circles will be added to the group. The circles will be translated to specific position in the stage using setTranslateX() and setTranslateY() function. The group will be added to the scene and the scene will be added to the stage.

```java // Java program to create four Circles and // add DropShadow effect to it which are of // different blur types and different values // of offsetX, offsetY and radius import javafx.application.Application; import javafx.scene.Scene; import javafx.scene.control.; import javafx.scene.layout.; import javafx.stage.Stage; import javafx.scene.image.; import javafx.scene.effect.; import java.io.*; import javafx.scene.shape.Circle; import javafx.scene.paint.Color; import javafx.scene.Group;

public class drop_shadow_2 extends Application {

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

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

// create a circle         Circle circle = new Circle(0.0f, 0.0f, 25.0f, Color.RED);         Circle circle1 = new Circle(0.0f, 0.0f, 25.0f, Color.RED);         Circle circle2 = new Circle(0.0f, 0.0f, 25.0f, Color.RED);         Circle circle3 = new Circle(0.0f, 0.0f, 25.0f, Color.RED);

// translate to a position         circle.setTranslateX(50.0f);         circle.setTranslateY(50.0f);

// translate to a position         circle1.setTranslateX(150.0f);         circle1.setTranslateY(50.0f);

// translate to a position         circle2.setTranslateX(50.0f);         circle2.setTranslateY(150.0f);

// translate to a position         circle3.setTranslateX(150.0f);         circle3.setTranslateY(150.0f);

// create drop_shadow effect         DropShadow drop_shadow1 = new DropShadow(BlurType.values()[0],                                      Color.BLUE, 5, 3.0f, 2.0f, 2.0f);

DropShadow drop_shadow2 = new DropShadow(BlurType.values()[1],                                      Color.BLUE, 5, 3.0f, 3.0f, 3.0f);

DropShadow drop_shadow3 = new DropShadow(BlurType.values()[2],                                      Color.BLUE, 5, 4.0f, 3.0f, 3.0f);

DropShadow drop_shadow4 = new DropShadow(BlurType.values()[3],                                      Color.BLUE, 5, 4.0f, 2.0f, 2.0f);

// set effect         circle.setEffect(drop_shadow1);         circle1.setEffect(drop_shadow2);         circle2.setEffect(drop_shadow3);         circle3.setEffect(drop_shadow4);

// create a Group         Group group = new Group(circle, circle1, circle2, circle3);

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

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

stage.show();     }

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

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

输出: