ScrollWheelHandler.java

net.minecraft.client.ScrollWheelHandler

信息

• 全限定名：net.minecraft.client.ScrollWheelHandler
• 类型：public class
• 包：net.minecraft.client
• 源码路径：src/main/java/net/minecraft/client/ScrollWheelHandler.java
• 起始行号：L8
• 职责：

  TODO

字段/常量

• accumulatedScrollX

  • 类型: double
  • 修饰符: private
  • 源码定位: L9
  • 说明:

    TODO

• accumulatedScrollY

  • 类型: double
  • 修饰符: private
  • 源码定位: L10
  • 说明:

    TODO

内部类/嵌套类型

• 无

构造器

• 无

方法

下面的方法块按源码顺序生成。

public Vector2i onMouseScroll(double scaledXScrollOffset, double scaledYScrollOffset) @ L12

• 方法名：onMouseScroll
• 源码定位：L12
• 返回类型：Vector2i
• 修饰符：public

参数:

• scaledXScrollOffset: double
• scaledYScrollOffset: double

说明:

TODO

public static int getNextScrollWheelSelection(double wheel, int currentSelected, int limit) @ L34

• 方法名：getNextScrollWheelSelection
• 源码定位：L34
• 返回类型：int
• 修饰符：public static

参数:

• wheel: double
• currentSelected: int
• limit: int

说明:

TODO

代码

@OnlyIn(Dist.CLIENT)
public class ScrollWheelHandler {
    private double accumulatedScrollX;
    private double accumulatedScrollY;
 
    public Vector2i onMouseScroll(double scaledXScrollOffset, double scaledYScrollOffset) {
        if (this.accumulatedScrollX != 0.0 && Math.signum(scaledXScrollOffset) != Math.signum(this.accumulatedScrollX)) {
            this.accumulatedScrollX = 0.0;
        }
 
        if (this.accumulatedScrollY != 0.0 && Math.signum(scaledYScrollOffset) != Math.signum(this.accumulatedScrollY)) {
            this.accumulatedScrollY = 0.0;
        }
 
        this.accumulatedScrollX += scaledXScrollOffset;
        this.accumulatedScrollY += scaledYScrollOffset;
        int wheelX = (int)this.accumulatedScrollX;
        int wheelY = (int)this.accumulatedScrollY;
        if (wheelX == 0 && wheelY == 0) {
            return new Vector2i(0, 0);
        } else {
            this.accumulatedScrollX -= wheelX;
            this.accumulatedScrollY -= wheelY;
            return new Vector2i(wheelX, wheelY);
        }
    }
 
    public static int getNextScrollWheelSelection(double wheel, int currentSelected, int limit) {
        int step = (int)Math.signum(wheel);
        currentSelected -= step;
        currentSelected = Math.max(-1, currentSelected);
 
        while (currentSelected < 0) {
            currentSelected += limit;
        }
 
        while (currentSelected >= limit) {
            currentSelected -= limit;
        }
 
        return currentSelected;
    }
}

引用的其他类

• 无