本文介绍了四色渐变使用Java AWT的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
I'm试图建立一个4色渐变填充矩形。每个角都会有diferent颜色。
I´m trying to create a 4 color gradient to fill a rectangle. Each corner will have a diferent color.
结果图像I'm试图实现是这样的:
The result image I´m trying to achieve is something like this:
的
有很多关于如何做一个2颜色渐变有用的资源,但没有超过3。
There is a lot of helpful resources on how to make a 2 color gradient, but none for more than 3.
推荐答案
这样的事情?
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.*;
import javax.imageio.ImageIO;
import javax.swing.*;
public class ThreeWayGradient {
public static void main(String[] args) {
final BufferedImage image = new BufferedImage(
200, 200, BufferedImage.TYPE_INT_RGB);
Runnable r = new Runnable() {
@Override
public void run() {
Graphics2D g = image.createGraphics();
GradientPaint primary = new GradientPaint(
0f, 0f, Color.WHITE, 200f, 0f, Color.ORANGE);
GradientPaint shade = new GradientPaint(
0f, 0f, new Color(0, 0, 0, 0),
0f, 200f, new Color(0, 0, 0, 255));
g.setPaint(primary);
g.fillRect(0, 0, 200, 200);
g.setPaint(shade);
g.fillRect(0, 0, 200, 200);
JLabel l = new JLabel(new ImageIcon(image));
JOptionPane.showMessageDialog(null, l);
File f = new File(System.getProperty("user.home"),
"ThreeWayGradient.png");
try {
ImageIO.write(image, "png", f);
} catch (IOException ex) {
ex.printStackTrace();
}
}
};
SwingUtilities.invokeLater(r);
}
}
使它成为一个工厂方法
..因为它是prettier。
Making it into a factory method
..because it is prettier.
import java.awt.*;
import java.awt.image.BufferedImage;
import javax.swing.*;
public class ThreeWayGradient {
public static BufferedImage getThreeWayGradient(
int size,
Color primaryLeft,
Color primaryRight,
Color shadeColor) {
BufferedImage image = new BufferedImage(
size, size, BufferedImage.TYPE_INT_RGB);
Graphics2D g = image.createGraphics();
GradientPaint primary = new GradientPaint(
0f, 0f, primaryLeft, size, 0f, primaryRight);
int rC = shadeColor.getRed();
int gC = shadeColor.getGreen();
int bC = shadeColor.getBlue();
GradientPaint shade = new GradientPaint(
0f, 0f, new Color(rC, gC, bC, 0),
0f, size, shadeColor);
g.setPaint(primary);
g.fillRect(0, 0, size, size);
g.setPaint(shade);
g.fillRect(0, 0, size, size);
g.dispose();
return image;
}
/**
* Presumed to have a layout that shows multiple components.
*/
public static void addGradient(
JPanel p, int s, Color pL, Color pR, Color sh) {
JLabel l = new JLabel(new ImageIcon(getThreeWayGradient(s, pL, pR, sh)));
p.add(l);
}
public static void main(String[] args) {
Runnable r = new Runnable() {
@Override
public void run() {
JPanel gui = new JPanel(new GridLayout(2,4,1,1));
addGradient(gui,100,Color.YELLOW,Color.RED,Color.GREEN);
addGradient(gui,100,Color.GREEN,Color.YELLOW,Color.RED);
addGradient(gui,100,Color.RED,Color.GREEN,Color.YELLOW);
addGradient(gui,100,Color.BLUE,Color.MAGENTA,Color.PINK);
addGradient(gui,100,Color.WHITE,Color.RED,Color.BLACK);
addGradient(gui,100,Color.RED,Color.GREEN,Color.BLACK);
addGradient(gui,100,Color.BLUE,Color.PINK,Color.BLACK);
addGradient(gui,100,Color.BLUE,Color.CYAN,Color.BLACK);
JOptionPane.showMessageDialog(null, gui);
}
};
SwingUtilities.invokeLater(r);
}
}
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