suitablestartpoint.java

来自「自己写的一个Java画图板程序 支持鼠标拖动图形 选中图形 改变颜色等 推荐使用」· Java 代码 · 共 42 行

package project;

import java.awt.Point;


//辅助类，指定一个拖动矩形的起点和终点，然后找到这个矩形的左上角坐标
public class SuitableStartPoint {
	
	private Point suitableStartPoint = new Point();
	
	public Point getSuitableStartPoint(Point mouseOriginalPoint, Point mouseEndPoint)
	{
		int width = mouseOriginalPoint.x - mouseEndPoint.x;
		
		
		int height = mouseOriginalPoint.y - mouseEndPoint.y;
		
		
		
		if(width < 0)
		{
			suitableStartPoint.x = mouseOriginalPoint.x;
		}
		else
		{
			suitableStartPoint.x = mouseOriginalPoint.x - width;
		}
		
		if(height < 0)
		{
			suitableStartPoint.y = mouseOriginalPoint.y;
		}
		else
		{
			suitableStartPoint.y = mouseOriginalPoint.y - height;
		}
		
		return suitableStartPoint;
	}

}