下面是我当前的算法,用于在 Canvas 空间(代表图标)的中心对齐矩形(代表符号)。这只是我感兴趣的算法,所以请忽略其余代码,因为它仅用于演示目的,作为视觉辅助。
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.Shape;
import java.awt.geom.AffineTransform;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class IconSymbol extends JFrame {
public IconSymbol(double iWH, double s, double w, double h) {
getContentPane().add(new Canvas((int)iWH, s, w, h));
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setSize((int)iWH, (int)iWH);
setVisible(true);
}
public static void main(String arg[]) {
IconSymbol is = new IconSymbol(100, 0.9, 50, 50);
}
class Canvas extends JPanel {
// STIPULATED
double iconWH = 0;
double sScale = 0;
double sWidth = 0;
double sHeight = 0;
// CALCULATED
double padX = 0;
double padY = 0;
double xOffSet = 0;
double yOffSet = 0;
public Canvas(double iWH,double sS,double sW,double sH) {
this.iconWH = iWH;
this.sScale = sS;
this.sWidth = sW;
this.sHeight = sH;
}
public void paint(Graphics g) {
Graphics2D g2D = (Graphics2D) g;
g2D.setBackground(Color.WHITE);
g2D.setPaint(Color.BLUE);
Shape icon = new Rectangle.Double(0,0,(int)iconWH,(int)iconWH);
g2D.fill(icon);
g2D.setPaint(Color.BLACK);
int width = (int)iconWH / 10;
int height= (int)iconWH / 10;
for(int row=0;row<10;row++){
for(int col=0;col<10;col++){
g.drawRect(row*width,col*height,width,height);
}
}
Point off = algorithm();
g2D.setPaint(Color.RED);
Shape s = new Rectangle.Double(off.x,off.y,(int)sWidth,(int)sHeight);
AffineTransform tran = AffineTransform.getScaleInstance(sScale, sScale);
g2D.fill(tran.createTransformedShape(s));
}
public Point algorithm(){
// ALGORITHM WITH EXACT NEEDED PARAMETERS
padX = (sWidth - ((sWidth * sScale))) / 2;
padY = (sHeight - ((sHeight * sScale))) / 2;
xOffSet = padX + ((iconWH - (sWidth * sScale)) / 2);
yOffSet = padX + ((iconWH - (sHeight * sScale)) / 2);
Point point = new Point((int)xOffSet, (int)yOffSet);
return point;
}
}
}
最佳答案
您的代码的问题是缩放变换 tran
正在缩放矩形的计算原点,off
,以及 sWidth
和 sHeight
。如果您想保持当前的方案,您需要在 algorithm
方法中对计算出的偏移量应用逆比例变换:
public Point algorithm(){
// ALGORITHM WITH EXACT NEEDED PARAMETERS
xOffSet = ((iconWH - (sWidth * sScale)) / 2) / sScale;
yOffSet = ((iconWH - (sHeight * sScale)) / 2) / sScale;
Point point = new Point((int)xOffSet, (int)yOffSet);
return point;
}
请注意,我删除了 padX
和 padY
,因为计算偏移不需要它们。
关于java - 计算填充以使矩形居中对齐(按百分比调整大小),我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/52289848/