如何根据用户操作更改图标的颜色？ [英] How to change the color of an icon based on user action?

问题描述

我在写一个应用程序，用户可以通过选择一种新的颜色来改变屏幕上的图像颜色。我有一个简单的图片 - 只有40x40 - 像这样：

I am writing an application where the user can change the color of the image on screen by choosing a new color. I have a simple image - only 40x40 - like this:

我已经尝试过很多事情：像素替换，ColorModel，RGBFilter等等。我无法想象这个图像的东西出来。在尝试的过程中，我学习了BufferedImage，我可以得到.png的格式，并显示在屏幕上。我可以使用像素替换将形状变成一个实心的颜色块，但结果是可怕的。

I have tried many things: pixel replacement, ColorModel, RGBFilter, etc. I can't figure this image stuff out. In the process of trying, I have learned about BufferedImage and I can get the .png's into that format and displayed on screen. I can turn the shape into a solid blob of color using pixel replacement, but the results are horrible.

从我收集的，我想使用ColorModel或过滤，但我被骗了。这里是一个简单的应用程序，演示我在哪里。

From what I've gleaned, I want to use a ColorModel or Filter, but I am stumped. Here is a simple app that demonstrates where I am.

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JColorChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;


public class ChangeImageColor {
  public static void main(String[] args) {
    final ChangeColor cc = new ChangeColor();
    java.awt.EventQueue.invokeLater( new Runnable() { @Override
      public void run() { cc.setVisible( true ); }}
    ); // invokeLater
  } // main
} // ChangeImageColor

  class ChangeColor extends JFrame {
    String  CHAR_HEAD    = "res/images/char/Head.png";
    JLabel  imageHead    = new JLabel( new ImageIcon( CHAR_HEAD ) );
    JButton buttonChoose = new JButton( "Choose Color" );

    public ChangeColor() {
      this.setSize( 200, 200 );
      this.setLayout( new BorderLayout() );

      buttonChoose.addActionListener( listenerButton );

      this.add( imageHead, BorderLayout.CENTER );
      this.add( buttonChoose, BorderLayout.SOUTH );
    } // constructor

    ActionListener listenerButton = new ActionListener() {
      @Override public void actionPerformed( ActionEvent event ) {
        Color newColor = JColorChooser.showDialog( null, "Choose Color", Color.RED );
        ImageIcon icon = new ImageIcon( CHAR_HEAD );

        System.out.println( "~" + newColor );

        // *****************
        // insert code to change color of Head.png to shades of chosen color
        // *****************

        imageHead.setIcon( icon );
      } // actionPerformed
    };

  } // class

编辑：这是一个之前和之后的图像我想在选择较暗的颜色后：

Here is a "before" and "after" image of what I would like after a darker color is chosen:

推荐答案

也许有一个更优雅和高效的版本，但如果你有一个BufferedImage你可以尝试像：

Perhaps there is a more elegant and efficient version but if you have a BufferedImage you could try something like:

BufferedImage image;
for(int y = 0; y < image.getHeight(); y++)
    for(int x = 0; x < image.getWidth(); x++)
    {
        Color imageColor = new Color(image.getRGB(x, y));
        //mix imageColor and desired color 
        image.setRGB(x, y, imageColor.getRGB());
    }

也许这是真正的问题：混合两种颜色可以通过乘...

Maybe this is the real problem: Mixing the two colors can be done by multiplying them...

编辑：

private Color multiply(Color color1, Color color2)
{
    float[] color1Components = color1.getRGBComponents(null);   
    float[] color2Components = color2.getRGBColorComponents(null);
    float[] newComponents = new float[3]; 

    for(int i = 0; i < 3; i++)
        newComponents[i] = color1Components[i] * color2Components[i];

    return new Color(newComponents[0], newComponents[1], newComponents[2],
        color1Components[3]);
}

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