Sch*_*ent 18 java user-interface swing jframe
我有一个(有点哲学)问题相对于Swing,或者一般的GUI编程.是否有关于在何处定位JFrame
应用程序中使用的实例的公认最佳实践?
setLocationRelativeTo(null)
)?JFrame
找到?相对于它的父母JFrame
,在屏幕的中心,我们想要的任何地方?我一直认为有一些最好的做法,有点像这样的"GUI圣经",我错了,我应该(喘气)任意决定做什么?
And*_*son 25
这是一个包含以下建议的示例:
气垫船满鳗鱼 - 按平台设置位置.
但继续增加2个调整:
4点组合提供最佳用户体验!
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.Properties;
import java.io.*;
class RestoreMe {
/** This will end up in the current directory
A more sensible location is a sub-directory of user.home.
(left as an exercise for the reader) */
public static final String fileName = "options.prop";
/** Store location & size of UI */
public static void storeOptions(Frame f) throws Exception {
File file = new File(fileName);
Properties p = new Properties();
// restore the frame from 'full screen' first!
f.setExtendedState(Frame.NORMAL);
Rectangle r = f.getBounds();
int x = (int)r.getX();
int y = (int)r.getY();
int w = (int)r.getWidth();
int h = (int)r.getHeight();
p.setProperty("x", "" + x);
p.setProperty("y", "" + y);
p.setProperty("w", "" + w);
p.setProperty("h", "" + h);
BufferedWriter br = new BufferedWriter(new FileWriter(file));
p.store(br, "Properties of the user frame");
}
/** Restore location & size of UI */
public static void restoreOptions(Frame f) throws IOException {
File file = new File(fileName);
Properties p = new Properties();
BufferedReader br = new BufferedReader(new FileReader(file));
p.load(br);
int x = Integer.parseInt(p.getProperty("x"));
int y = Integer.parseInt(p.getProperty("y"));
int w = Integer.parseInt(p.getProperty("w"));
int h = Integer.parseInt(p.getProperty("h"));
Rectangle r = new Rectangle(x,y,w,h);
f.setBounds(r);
}
public static void main(String[] args) {
final JFrame f = new JFrame("Good Location & Size");
f.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
f.addWindowListener( new WindowAdapter() {
public void windowClosing(WindowEvent we) {
try {
storeOptions(f);
} catch(Exception e) {
e.printStackTrace();
}
System.exit(0);
}
});
JTextArea ta = new JTextArea(20,50);
f.add(ta);
f.pack();
File optionsFile = new File(fileName);
if (optionsFile.exists()) {
try {
restoreOptions(f);
} catch(IOException ioe) {
ioe.printStackTrace();
}
} else {
f.setLocationByPlatform(true);
}
f.setVisible(true);
}
}
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我通常会让平台通过调用来决定:
myJFrame.setLocationByPlatform(true);
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这使窗口"显示在本机窗口系统的默认位置".有关此内容的更多信息:Window API