?
Solved

Why are the tabs not generated in this code with SWT?

Posted on 2013-06-03
2
Medium Priority
?
292 Views
Last Modified: 2013-06-04
Hi,
Can you please tell me what is wrong in this code so that the tabs are not generated?

import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.CTabFolder;
import org.eclipse.swt.custom.CTabItem;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Button;

public class Gui {
    public static void main(String[] args) {
        Display display = new Display();
        Shell shell = new Shell(display);

        // Create the layout.
        RowLayout layout = new RowLayout();
        // Optionally set layout fields.
        layout.wrap = true;
        // Set the layout into the composite.
        shell.setLayout(layout);
        // Create the children of the composite.
        new Button(shell, SWT.PUSH).setText("B1");
        new Button(shell, SWT.PUSH).setText("Wide Button 2");
        new Button(shell, SWT.PUSH).setText("Button 3");
        shell.pack();
        shell.open();
        
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch()) display.sleep();
        }
        
        FillLayout fillLayout = new FillLayout();
        fillLayout.type = SWT.VERTICAL;
        shell.setLayout(fillLayout);
        new Button(shell, SWT.PUSH).setText("B1");
        new Button(shell, SWT.PUSH).setText("Wide Button 2");
        new Button(shell, SWT.PUSH).setText("Button 3");
        
        fillLayout.type = SWT.HORIZONTAL;
                
        RowLayout rowLayout = new RowLayout();
        rowLayout.wrap = false;
        rowLayout.pack = false;
        rowLayout.justify = true;
        rowLayout.type = SWT.VERTICAL;
        rowLayout.marginLeft = 5;
        rowLayout.marginTop = 5;
        rowLayout.marginRight = 5;
        rowLayout.marginBottom = 5;
        rowLayout.spacing = 0;
        shell.setLayout(rowLayout);     
        
        rowLayout.wrap = true;
        rowLayout.pack = true;
        rowLayout.justify = false;
        rowLayout.type = SWT.HORIZONTAL;
        
        shell.setLayout(new GridLayout());
        // SWT.BOTTOM to show at the bottom
        CTabFolder folder = new CTabFolder(shell, SWT.TOP);
        GridData data = new GridData(GridData.FILL, 
                GridData.FILL, true, true,
                20, 10);
        folder.setLayoutData(data);
        CTabItem cTabItem1 = new CTabItem(folder, SWT.NONE);
        cTabItem1.setText("Tab1");
        CTabItem cTabItem2 = new CTabItem(folder, SWT.NONE);
        cTabItem2.setText("Tab2");
        CTabItem cTabItem3 = new CTabItem(folder, SWT.NONE);
        cTabItem3.setText("Tab3");

        Text text = new Text(folder, SWT.BORDER);
        text.setText("You can type the list of files in this field");
        cTabItem1.setControl(text);

        shell.pack();
        shell.open();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch()) {
                display.sleep();
            }
        }
    }
}

Open in new window

0
Comment
Question by:Tolgar
2 Comments
 
LVL 37

Expert Comment

by:zzynx
ID: 39218172
>> the tabs are not generated?
Could you add a screenshot illustrating what exactly you mean?
0
 
LVL 16

Accepted Solution

by:
Valeri earned 2000 total points
ID: 39218663
I can see you are the same asker. Some more advices:
1. if you remove the first occurence of this code:

while (!shell.isDisposed()) {
          if (!display.readAndDispatch()) display.sleep();
}

then you will see that your tabs are generated and shown, along with the buttons, because the buttons are created in this way: new Button(shell, SWT.PUSH).setText("B2"); which means that the respective button is direct child of the shell.

2. if you remove "rowLayout" and all of the code related to it, the result will be tha same, because "rowLayout" contains nothing.
3. Most of the constructors in swt has a parent as a first parameter. because of this it's easy to trace component hierarchy.
0

Featured Post

Free Tool: Port Scanner

Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This was posted to the Netbeans forum a Feb, 2010 and I also sent it to Verisign. Who didn't help much in my struggles to get my application signed. ------------------------- Start The idea here is to target your cell phones with the correct…
Go is an acronym of golang, is a programming language developed Google in 2007. Go is a new language that is mostly in the C family, with significant input from Pascal/Modula/Oberon family. Hence Go arisen as low-level language with fast compilation…
Video by: Michael
Viewers learn about how to reduce the potential repetitiveness of coding in main by developing methods to perform specific tasks for their program. Additionally, objects are introduced for the purpose of learning how to call methods in Java. Define …
Viewers will learn how to properly install Eclipse with the necessary JDK, and will take a look at an introductory Java program. Download Eclipse installation zip file: Extract files from zip file: Download and install JDK 8: Open Eclipse and …
Suggested Courses
Course of the Month12 days, 23 hours left to enroll

578 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question