Java 拉伸图标以适合按钮
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Java Stretch Icon to fit button
提问by Brandon
I'm trying to resize my icon so that it covers the whole button and sits in the center of the button. When I try, it stretches my button and messes up everything else. How can I do it? Currently, my code is:
我正在尝试调整我的图标大小，使其覆盖整个按钮并位于按钮的中心。当我尝试时，它会拉长我的按钮并弄乱其他所有内容。我该怎么做？目前，我的代码是：
In my constructor of a class..
在我的一个类的构造函数中..
javax.swing.JButton Console = new javax.swing.JButton;
ScaleButtonImage(Console, ConsoleEnabledImage);
Within that class..
在那个班级..
private void ScaleButtonImage(javax.swing.JButton Button, java.awt.Image ButtonIcon) {
double Width = ButtonIcon.getWidth(Button);
double Height = ButtonIcon.getHeight(Button);
double xScale = 28/Width;//Button.getWidth() / Width;
double yScale = 28/Height;//Button.getHeight() / Height;
double Scale = Math.min(xScale, yScale); //ToFit
//double Scale = Math.max(xScale, yScale); //ToFill
java.awt.Image scaled = ButtonIcon.getScaledInstance((int)(Scale * Width), (int)(Scale * Height), java.awt.Image.SCALE_SMOOTH);
Button.setIcon(new javax.swing.ImageIcon(scaled));
}
LAYOUT:
布局：
.addGroup(layout.createSequentialGroup()
.addComponent(Enable, javax.swing.GroupLayout.PREFERRED_SIZE, 28, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(Graphics, javax.swing.GroupLayout.PREFERRED_SIZE, 28, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(Debug, javax.swing.GroupLayout.PREFERRED_SIZE, 28, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(Console, javax.swing.GroupLayout.PREFERRED_SIZE, 28, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
Then I link all of them horizontally and vertically so they're all the same size.
然后我将它们水平和垂直链接起来，使它们的大小都相同。
Instead, it ends up looking like the below. Also, if I change the icon of the first button, all the buttons change size because of my constrains. How do I make the icons fit the buttons?
相反，它最终看起来像下面这样。此外，如果我更改第一个按钮的图标，由于我的限制，所有按钮都会更改大小。如何使图标适合按钮？
回答by Branislav Lazic
Try something like this (If I didn't make any mistake with brackets):
尝试这样的事情（如果我没有用括号弄错的话）：
JButton button = new JButton(new ImageIcon(((new ImageIcon(
"path-to-image").getImage()
.getScaledInstance(64, 64,
java.awt.Image.SCALE_SMOOTH)))));
This way your image will be resized (in my case to size 64x64) and added to button, like in this example here:
这样你的图像将被调整大小（在我的例子中为 64x64）并添加到button，就像在这个例子中一样：
EDIT:
编辑：
This is the way to resize your image and to keep image ratio:
这是调整图像大小并保持图像比例的方法：
ImageIcon ii = new ImageIcon("path-to-image");
int scale = 2; // 2 times smaller
int width = ii.getIconWidth();
int newWidth = width / scale;
yourComponent.setIcon(new ImageIcon(ii.getImage().getScaledInstance(newWidth, -1,
java.awt.Image.SCALE_SMOOTH)));
回答by VGR
This worked for me:
这对我有用：
public class ImageButton
extends JButton {
private static final long serialVersionUID = 1;
/** @serial */
private Image image;
/** @serial */
private final Rectangle innerArea = new Rectangle();
public Image getImage() {
return image;
}
public void setImage(Image image) {
this.image = image;
repaint();
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
if (image != null) {
SwingUtilities.calculateInnerArea(this, innerArea);
g.drawImage(image,
innerArea.x, innerArea.y, innerArea.width, innerArea.height,
this);
}
}
}
