Add perspective and view to IDE app

We already created IDE bundle and used it in IDE app. Now we add perspective and view to IDE app.

1. Create folder "tutorials/MyIdeApp/src/main/java/myideapp", create file "View.java" in it, insert code:

package myideapp;

import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.ui.part.ViewPart;

public class View extends ViewPart {

  @Override
  public void createPartControl(final Composite parent) {
    parent.setLayout(new RowLayout());
    Button btnShowDialog = new Button(parent, SWT.PUSH);
    btnShowDialog.setText("Show dialog");
    btnShowDialog.addSelectionListener(new SelectionAdapter() {
      @Override
      public void widgetSelected(SelectionEvent event) {
        MessageDialog.openInformation(parent.getShell(), "Message", "There is no spoon.");
      }
    });
  }

  @Override
  public void setFocus() {
  }
}

2. Create file "Perspective.java" in the same folder, insert code:

package myideapp;

import org.eclipse.ui.IPageLayout;
import org.eclipse.ui.IPerspectiveFactory;

public class Perspective implements IPerspectiveFactory {

    public void createInitialLayout(IPageLayout layout) {
  	  layout.setEditorAreaVisible(false);
    }
}

3. Invoke on command line in "tutorials/MyIdeApp" folder:

gradle clean build

Hint: "clean" is needed only once, as soon as you introduced view or perspective. This way you remove cached information on IDE layout, that is stored in "configuration" subfolder of compiled product. Consequent builds can be done without "clean".

4. Run the compiled product from command line. As soon as program is fully started, you see new perspective and view with button:

When you click the button, the program shows message dialog: