[英]Selection of among multiple JInternalFrames in a container(JPanel)
I have some set of JInternalFrame
in a Jpanel
. 我在
Jpanel
有一些JInternalFrame
Jpanel
。 and the JPanel
is gridlayout. 而
JPanel
是gridlayout。 I need to set only one JInternalFrame
to be selected in the container ( JPanel
). 我只需要设置一个
JInternalFrame
即可在容器( JPanel
)中选择。 I created the JInternalFrame
instance dynamically and add to the panel. 我动态创建了
JInternalFrame
实例并将其添加到面板中。 I still have the list of JInternalFrame
but how to make only one to set selected. 我仍然有
JInternalFrame
的列表,但是如何只设置一个列表。
As suggested in How to Use Internal Frames , "Usually, you add internal frames to a desktop pane." 如“ 如何使用内部框架 ”中的建议: “通常,您将内部框架添加到桌面窗格中。” This allows you to use
activateFrame()
to indicate that a frame has focus. 这使您可以使用
activateFrame()
来指示框架具有焦点。 In this example , a javax.swing.Action
is used to select frames from a menu via setSelected()
. 在此示例中 ,使用
javax.swing.Action
通过setSelected()
从菜单中选择帧。 Additional discussion may be found in this Q&A . 在本问答中可以找到更多讨论。
Addendum: If you want to use a JPanel
, perhaps to get a nice GridLayout
, one aproach is to use an InternalFrameListener
as shown below. 附录:如果要使用
JPanel
,也许要获得一个漂亮的GridLayout
,一个方法是使用InternalFrameListener
,如下所示。
import java.awt.EventQueue;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.beans.PropertyVetoException;
import java.util.ArrayList;
import java.util.List;
import javax.swing.JFrame;
import javax.swing.JInternalFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.event.InternalFrameAdapter;
import javax.swing.event.InternalFrameEvent;
/** @see https://stackoverflow.com/questions/8389640 */
public class InternalGrid extends JPanel {
private final List<MyFrame> list = new ArrayList<MyFrame>();
public InternalGrid() {
super(new GridLayout(2, 2));
for (int i = 0; i < 4; i++) {
MyFrame f = new MyFrame("Frame", i);
list.add(f);
this.add(f);
}
}
private void display() {
JFrame f = new JFrame("InternalGrid");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.add(this);
f.pack();
f.setSize(320, 240);
f.setLocationRelativeTo(null);
f.setVisible(true);
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
new InternalGrid().display();
}
});
}
class MyFrame extends JInternalFrame {
MyFrame(String name, int i) {
super(name + String.valueOf(i), true, true, true, false);
this.pack();
this.setVisible(true);
this.setLayout(new FlowLayout());
this.add(new JLabel("Hi, I'm " + this.getTitle()));
this.addInternalFrameListener(new InternalFrameAdapter() {
@Override
public void internalFrameActivated(InternalFrameEvent e) {
for (MyFrame f : list) {
if (f != MyFrame.this) {
try {
f.setSelected(false);
} catch (PropertyVetoException ex) {
System.out.println(ex);
}
}
}
}
});
}
}
}
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