我不知道为什么我的Jframe上没有显示背景颜色。以下是我尝试过的代码。
当我打电话
AnimatedDialogBox animatedDialogBox = new AnimatedDialogBox("Saving TransSet form", dataSheetTable);
它没有显示我需要的确切颜色。它显示没有任何背景颜色。 AnimatedDialogBox类如下:
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Point;
import java.awt.Toolkit;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JProgressBar;
import javax.swing.SwingWorker;
import net.miginfocom.swing.MigLayout;
public class AnimatedDialogBox {
private JFrame progressDialog ;
private JProgressBar bar;
private Task task;
private ResourceManager resourceManager = new ResourceManager();
public AnimatedDialogBox(String message, JComponent parentComponent) {
progressDialog = new JFrame( message);
progressDialog.setLayout(new MigLayout());
progressDialog.setUndecorated(true);
progressDialog.setBackground(resourceManager.getColor("error.Panel.background")); // RGB = 243, 255, 159
progressDialog.setPreferredSize(new Dimension(300, 100));
JLabel label = new JLabel(message);
label.setBackground(resourceManager.getColor("error.Panel.background"));
progressDialog.add(label, "gapbefore 80,gapbottom 30, wrap");
bar = new JProgressBar(0, 100);
bar.setIndeterminate(true);
bar.setBackground(resourceManager.getColor("error.Panel.background"));
progressDialog.add(bar, "gapbefore 80, gapbottom 30, wrap");
progressDialog.setFocusableWindowState(false);
Point point = progressDialog.getLocation();
Dimension cDim = parentComponent.getSize();
progressDialog.setLocation((int) (cDim.getWidth() / 2)-100,
(int) cDim.getHeight() + 350);
progressDialog.pack();
task = new Task();
task.addPropertyChangeListener(new PropertyChangeListener() {
@Override
public void propertyChange(PropertyChangeEvent evt) {
if (evt.getPropertyName().equalsIgnoreCase("progress")) {
int progress = task.getProgress();
if (progress == 0) {
bar.setIndeterminate(true);
} else {
bar.setIndeterminate(false);
bar.setValue(progress);
progressDialog.dispose();
}
}
}
});
task.execute();
progressDialog.setVisible(true);
}
class Task extends SwingWorker<Void, Void> {
private static final long SLEEP_TIME = 1000;
public Task() {
}
@Override
public Void doInBackground() {
setProgress(0);
try {
Thread.sleep(SLEEP_TIME);// imitate a long-running task
} catch (InterruptedException e) {
}
setProgress(100);
return null;
}
@Override
public void done() {
Toolkit.getDefaultToolkit().beep();
}
}
}
答案 0 :(得分:3)
JProgressBar
的背景颜色由其UI代表ProgressBarUI
决定。例如,
UIManager.put("ProgressBar.background", Color.red);
并非所有实现都使用颜色;例如,com.apple.laf.AquaProgressBarUI
忽略了有利于here外观的设置。作为替代方案,您可能需要根据建议here考虑封闭面板上的有色背景或Border
。
另请注意,您可以使用process()
方法更新GUI,如图here所示。
答案 1 :(得分:1)
一些想法:
您不应该将组件直接添加到JFrame。相反,您的内容应该放在“内容窗格”中。请参阅JFrame.setContentPane(),JFrame.getContentPane()。您可能需要参考JFrame文档或教程。
如果组件不是不透明的,则不会渲染其背景。请参阅JComponent.setOpaque(),Component.isOpaque()。