[SOLVED] Cut,Past,copy in edit menu

[smartsubroto]

Hi all,

i just want to create an edit menu which will contain cut,copy paste,selectall option, and which will work.
Please suggest

[Norm]

Suggestions: Read a java text book. Do a search online for sample code.

[hardwired]

You can find this in TextComponentDemo.java on Text Component Features.

[serjant]

For my diploma work at university i made java editor,so to each of JMenutItem pass with ActionListener,I attach the code in that case if you use JTextArea
actionPerformed(ActionEvent e) for cut command:
Assuming that

JTextArea textArea=new JTextArea();

//cut command 
		if(e.getActionCommand().equals("Cut")){
			
			String selection=textArea.getSelectedText();
			
			if(selection==null){
				return;
			}
			StringSelection clipString=new StringSelection(selection);
			clipboard.setContents(clipString,clipString);
			textArea.replaceSelection("");
}

actionPerformed(ActionEvent e) for copy command:

//copy command
		if(e.getActionCommand().equals("Copy")){
			
			String selection =textArea.getSelectedText();
			
			if(selection==null){
				return;
			}
			StringSelection clipString=new StringSelection(selection);
			clipboard.setContents(clipString, clipString);
		}

actionPerformed(ActionEvent e) for paste command:

//paste command
		if(e.getActionCommand().equals("Paste")){
		
			Transferable clip_data=clipboard.getContents(this);
			
			try{
				String clip_string=(String)clip_data.getTransferData(DataFlavor.stringFlavor);
				textArea.replaceSelection(clip_string);
				
			}catch(Exception excpt){
				
			}
		}

[serjant]

The selection option for JTextArea is :

textArea.selectAll();
String selectedText=textArea.getSelectedText();

[Eku]

there is already a function for cut-copy-paste in java. you just need to call it ^_^
I also made a javapad almost like notepad but can compile and run java ^_^
But cant handle errors T_T

Here is a sample code from my javapad, it is for cut

Action cutAction = textArea.getActionMap().get(DefaultEditorKit.cutAction);
cutItem = editMenu.add(cutAction);
cutItem.setText("Cut");

[smartsubroto]

Ya i know how to create Edit option for TextArea.
but i want to do something different.
For example if there is a 10 fields, then this TextArea concept will not work cause we dont know, in which field my cursor is and since it contains 10 fields, so it is not possible to check all the fields .
Please suggest.. me for creating an edit menu in the JFrame so that it can be implemented in all the fields.

[Norm]

Would the cursor be in the component that has the focus?

[hardwired]

TextAction was designed for this. The nested classes in DefaultEditorKit extend it.

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.text.*;

public class TextFocus {
    private JMenuBar getMenuBar() {
        JMenu menu = new JMenu("edit");
        //DefaultEditorKit kit = new DefaultEditorKit();
        //Action[] actions = kit.getActions();
        //for(int i = 0; i < actions.length; i++)
        //    System.out.println(actions[i].getValue(Action.NAME));
        Action action = new DefaultEditorKit.CutAction();
        action.putValue(Action.NAME, "cut");
        menu.add(action);
        action = new DefaultEditorKit.CopyAction();
        action.putValue(Action.NAME, "copy");
        menu.add(action);
        action = new DefaultEditorKit.PasteAction();
        action.putValue(Action.NAME, "paste");
        menu.add(action);
        menu.add(new SelectAction());
        JMenuBar menuBar = new JMenuBar();
        menuBar.add(menu);
        return menuBar;
    }

    private class SelectAction extends TextAction {
        SelectAction() {
            super(DefaultEditorKit.selectAllAction);
            super.putValue(NAME, "selectAll");
        }

        public void actionPerformed(ActionEvent e) {
            getFocusedComponent().selectAll();
        }
    }

    private JPanel getContent() {
        String[] strs = {
            "red", "green", "yellow", "blue"
        };
        JPanel panel = new JPanel(new GridBagLayout());
        GridBagConstraints gbc = new GridBagConstraints();
        gbc.weightx = 1.0;
        gbc.weighty = 1.0;
        for(int i = 0; i < 4; i++) {
            JTextField tf = new JTextField(strs[i], 12);
            gbc.gridwidth = ((i+1) % 2 == 0) ? gbc.REMAINDER : 1;
            panel.add(tf, gbc);
        }           
        return panel;
    }

    public static void main(String[] args) {
        TextFocus test = new TextFocus();
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.setJMenuBar(test.getMenuBar());
        f.add(test.getContent());
        f.setSize(400,400);
        f.setLocation(200,200);
        f.setVisible(true);
    }
}

[smartsubroto]

Thanks Hardwired,

This code really works.It helped me alot.