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[英]On using Nimbus look and feel, JButton vanishes totally in a JFrame if there is a background image
[英]JFrame and Nimbus Look And Feel
我在项目中使用Nimbus Look and Feel。 但是,尽管每个GUI JComponent都具有Nimbus的外观,但JFrame始终具有Windows外观。
JFrame如何拥有Nimbus外观和感觉?
编辑:操作系统:Windows XP
试试这个:
JFrame.setDefaultLookAndFeelDecorated(true); //before creating JFrames
有关详细信息,请参阅教程中的如何设置外观 。
import javax.swing.*;
class FrameLook {
public static void showFrame(String plaf) {
try {
UIManager.setLookAndFeel(plaf);
} catch(Exception e) {
e.printStackTrace();
}
JFrame f = new JFrame(plaf);
f.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
f.setSize(400,100);
f.setLocationByPlatform(true);
f.setDefaultLookAndFeelDecorated(true);
f.setVisible(true);
}
public static void main(String[] args) {
showFrame(UIManager.getSystemLookAndFeelClassName());
showFrame(UIManager.getCrossPlatformLookAndFeelClassName());
showFrame("com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel");
}
}
确认@Andrew的怀疑, setDefaultLookAndFeelDecorated()
表示,当支持时,“新创建的JFrame
将由当前的LookAndFeel
提供他们的Window
装饰。” 我改变了大小以查看整个标题。
import javax.swing.*;
class FrameLook {
public static void showFrame(String plaf) {
try {
UIManager.setLookAndFeel(plaf);
} catch (Exception e) {
e.printStackTrace(System.out);
}
JFrame f = new JFrame(plaf);
f.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
f.setSize(500, 100);
f.setLocationByPlatform(true);
JFrame.setDefaultLookAndFeelDecorated(true);
f.setVisible(true);
}
public static void main(String[] args) {
showFrame(UIManager.getSystemLookAndFeelClassName());
showFrame(UIManager.getCrossPlatformLookAndFeelClassName());
showFrame("com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel");
}
}
并基于适用于XP的Windows经典UI进行确认。
你不能直接这样做,因为Nimbus不支持窗口装饰,这就是为什么你总是得到一个系统窗口,即使有给定的答案。 试试这个非常简单的代码:
import javax.swing.LookAndFeel;
import javax.swing.UIManager;
import javax.swing.UIManager.LookAndFeelInfo;
public class DoesNimbusSupportWindowDecorations {
@SuppressWarnings("unchecked")
public static void main(String... args) {
LookAndFeel nimbus = null;
for (LookAndFeelInfo lafInfo : UIManager.getInstalledLookAndFeels()) {
if (lafInfo.getName() == "Nimbus") {
try {
nimbus = ((Class<LookAndFeel>) Class.forName(
lafInfo.getClassName())).newInstance();
} catch (Exception e) {
System.err.println("Unexpected exception.");
}
}
}
if (nimbus != null) {
System.out.println("Nimbus supports window decorations...? "
+ (nimbus.getSupportsWindowDecorations() ? "YES" : "NO"));
} else {
System.err.println("Your system does not support Nimbus, you can't"
+ " run this test.");
}
}
}
或者只是在代码中使用正确的导入:
System.out.println(new NimbusLookAndFeel().getSupportsWindowDecorations());
超出我理解的是为什么Sun决定这样的东西,因为装饰确实存在于内部框架并且具有定制装饰。 我将调查是否可以通过扩展NimbusLookAndFeel或使用默认值来使用这些装饰,因为Nimbus基于Synth,不确定最佳方式。
这就是我的方式。 来自我的eclipse项目的复制粘贴。
import javax.swing.UIManager.LookAndFeelInfo;
import java.awt.EventQueue;
import java.awt.BorderLayout;
import javax.swing.*;
public class Frame1 {
private JFrame frame;
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
for (LookAndFeelInfo info : UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
UIManager.setLookAndFeel(info.getClassName());
break;
}
}
Frame1 window = new Frame1();
window.frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
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