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JavaFX 中鼠标颜色更改效果

发布于 2024-10-10 11:37:11 字数 217 浏览 0 评论 0原文

我想更改此代码，以便当我单击球时，它会变成红色。有人可以帮助我吗？我是java新手： http://download.oracle.com/javafx/1.3/tutorials /ui/syntax/index.html

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锦欢 2024-10-17 11:37:11

试试这个：

import javafx.scene.Scene;
import javafx.scene.shape.Rectangle;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.stage.Stage;
import javafx.scene.input.MouseEvent;


var circle: Circle;
Stage {
    title: "Declaring Is Easy!"
    scene: Scene {
        width: 300
        height: 250
        content: [
            circle = Circle {
                centerX: 150  centerY: 120 radius: 80
                fill: Color.MAROON
                stroke: Color.INDIANRED
                strokeWidth: 10.0

            }, //Circle
            Rectangle {
                x: 25, y: 80 width: 250, height: 80
                arcWidth: 20 arcHeight: 20
                fill: Color.web("#6699ff")
                stroke: Color.web("#003399")
            strokeWidth: 5.0
                onMouseClicked:function(e: MouseEvent)
                {
                 if(circle.fill == Color.MAROON)
                    circle.fill = Color.GREEN
                 else
                    circle.fill = Color.MAROON
                }

            } //Rectangle
        ] //Content
    } //Scene
} //Stage

这里有两个变化：
1）将Circle提取到变量（圆）中，以便以后使用。
2）向矩形添加鼠标单击事件，以翻转颜色。

Try this:

import javafx.scene.Scene;
import javafx.scene.shape.Rectangle;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.stage.Stage;
import javafx.scene.input.MouseEvent;


var circle: Circle;
Stage {
    title: "Declaring Is Easy!"
    scene: Scene {
        width: 300
        height: 250
        content: [
            circle = Circle {
                centerX: 150  centerY: 120 radius: 80
                fill: Color.MAROON
                stroke: Color.INDIANRED
                strokeWidth: 10.0

            }, //Circle
            Rectangle {
                x: 25, y: 80 width: 250, height: 80
                arcWidth: 20 arcHeight: 20
                fill: Color.web("#6699ff")
                stroke: Color.web("#003399")
            strokeWidth: 5.0
                onMouseClicked:function(e: MouseEvent)
                {
                 if(circle.fill == Color.MAROON)
                    circle.fill = Color.GREEN
                 else
                    circle.fill = Color.MAROON
                }

            } //Rectangle
        ] //Content
    } //Scene
} //Stage

Two changes here:
1) Extract Circle in a variable (circle), so that it can be used later.
2) Add a mouse clicked event to the rectangle, to flip colors.

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我的痛♀有谁懂 2024-10-17 11:37:11

你只需要把这里的“circle”改成“矩形”

if(**circle**.fill == Color.MAROON)
                    **circle**.fill = Color.GREEN
                 else
                    **circle**.fill = Color.MAROON
                }

if(**rectangle**.fill == Color.MAROON)
                    **rectangle**.fill = Color.GREEN
                 else
                    **rectangle**.fill = Color.MAROON
                }

，然后放入这句话 var矩形：矩形；就像var Circle: Circle;

you just have to change the word circle into rectangle right here

if(**circle**.fill == Color.MAROON)
                    **circle**.fill = Color.GREEN
                 else
                    **circle**.fill = Color.MAROON
                }

if(**rectangle**.fill == Color.MAROON)
                    **rectangle**.fill = Color.GREEN
                 else
                    **rectangle**.fill = Color.MAROON
                }

and put in this sentence var rectangle : Rectangle; just like var circle: Circle;

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