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SWT update / redraw / layout pruble

I know that many people experience this problem, but the solutions that I found on the Internet do not seem to solve my problem. I have a composite that has three buttons. I want the following: When I click one button, I want some other button to be grayed out (setEnabled (false)), and after a while (after the method is executed) I want the button to be turned on again.

Many of these problems are solved by calling the layout () method in the parent container, or this very similar one is resolved by calling Display.getCurrent (). update ();

Just my code can be summarized as follows:


import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Button;


public class app1 {

    protected Shell shell;

    /**
     * Launch the application.
     * @param args
     */
    public static void main(String[] args) {
        try {
            app1 window = new app1();
            window.open();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * Open the window.
     */
    public void open() {
        Display display = Display.getDefault();
        createContents();
        shell.open();
        shell.layout();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch()) {
                display.sleep();
            }
        }
    }

    /**
     * Create contents of the window.
     */
    Button button1 , button2 , button3;
    Label label;
    protected void createContents() {
        shell = new Shell();
        shell.setSize(450, 300);
        shell.setText("SWT Application");
        shell.setLayout(new GridLayout(1,false));
        {
            final Composite composite = new Composite(shell, SWT.NONE);
            composite.setLayout(new GridLayout(3,false));
            GridData gd_composite = new GridData(GridData.HORIZONTAL_ALIGN_FILL | GridData.VERTICAL_ALIGN_FILL);
            gd_composite.grabExcessHorizontalSpace = true;          
            gd_composite.horizontalSpan = 10;   //?
            gd_composite.verticalIndent = 5;
            composite.setLayoutData(gd_composite);
            GridData gd_button;

            {
                button1 = new Button(composite, SWT.NONE);
                button1.setText("Button 1");
                gd_button = new GridData(SWT.FILL, GridData.BEGINNING, false, false);
                gd_button.horizontalSpan = 1;
                button1.setLayoutData(gd_button);
                button1.addSelectionListener(new SelectionListener(){
                    public void widgetSelected(SelectionEvent e){
                        try{
                        button2.setEnabled(false);
                        button2.redraw();
                        button2.update();

                        //composite.redraw();
                        //composite.update();
                        //composite.layout();

                        shell.redraw();
                        shell.update();
                        shell.layout();                     
                        Display.getCurrent().update();
                        }   catch   (Exception e2)  {
                            System.err.println("exception e : " + e2.toString());
                        }

                        System.out.println("basla");


                        try {
                            System.out.println("sleep1");
                            Thread.sleep(100);
                        } catch (InterruptedException e1) {
                            e1.printStackTrace();
                        }   catch (Throwable th)    {
                            System.err.println("th: " + th.toString());
                        }
                        try {
                            System.out.println("sleep2");
                            Thread.sleep(100);
                        } catch (InterruptedException e1) {
                            e1.printStackTrace();
                        }   catch (Throwable th)    {
                            System.err.println("th: " + th.toString());
                        }
                        try {
                            System.out.println("sleep3");
                            Thread.sleep(100);
                        } catch (InterruptedException e1) {
                            e1.printStackTrace();
                        }   catch (Throwable th)    {
                            System.err.println("th: " + th.toString());
                        }

                        for(int i=0 ; i &lt 10000 ; i++)
                        {
                            System.out.println(i);
                        }
                    }
                    public void widgetDefaultSelected(SelectionEvent e) {
                        System.err.println("widgetDefault !");
                    }
                });
            }
            {
                button2 = new Button(composite, SWT.NONE);
                button2.setText("Button 2");
                gd_button = new GridData(SWT.FILL, GridData.CENTER, false, false);
                gd_button.horizontalSpan = 1;
                button2.setLayoutData(gd_button);
                button2.addSelectionListener(new SelectionListener(){
                    public void widgetSelected(SelectionEvent e){
                        button1.setEnabled(false);
                        composite.layout();
                        for (int i=1; i&lt=100; i++) {
                             try {
                                  Thread.sleep(10);
                             } catch (Throwable th) {}
                            label.setText(i + " %");
                            label.update();
                        }
                    }
                    public void widgetDefaultSelected(SelectionEvent e) {}
                });
            }

            {
                label = new Label(composite , SWT.NONE);
                label.setText("0 %");
                label.update();
            }
        }
    }
}

, widgetSelected(). - ( label.update() )

: , , Thread.sleep() ; , . , .

: , , MessageBox , . , widgetSelected:


button2.setEnabled(false)
MessageBox mBox = new MessageBox(Display.getCurrent().getActiveShell(), SWT.ICON_INFORMATION | SWT.OK);
mBox.setText("Information");
mBox.setMessage("Buttons updated!");
mBox.open();

, widgetSelected(). , Display.getCurrent().

Display.getCurrent().getActiveShell().redraw()
Display.getCurrent().getActiveShell().update()
Display.getCurrent().getActiveShell().layout()

.

,

+3
3

, ginu:

New Runnable(). run() , :

. , setEnabled , SWT-Event.

, reset. runnable Display.callAsync , . Display.callSync(Runnable), , runnable.

Eclipse, .

Edit: Btw, , layout() Display.update() , , SWT-Thread , / . , .:)

package test;

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

public class Test {

public static void main(final String[] args) {
    final Display display = new Display();
    final Shell shell = new Shell(display);
    shell.setLayout(new GridLayout(3, false));
    final Button button1 = new Button(shell, SWT.PUSH);
    button1.setText("Click");
    final Button button2 = new Button(shell, SWT.PUSH);
    button2.setText("Me");
    final Button button3 = new Button(shell, SWT.PUSH);
    button3.setText("Dude");

    button1.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, false));
    button2.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, false));
    button3.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, false));

    button2.setEnabled(false);
    button3.setEnabled(false);

    button1.addSelectionListener(new SelectionAdapter() {
        @Override
        public void widgetSelected(final SelectionEvent e) {
            button1.setEnabled(false);
            button2.setEnabled(true);
            button3.setEnabled(true);

            new Thread( new Runnable() {
                public void run() {
                    try {
                        // Do your operation here.
                        //
                        // Dummy sleep performed here instead.
                        Thread.sleep(1000);
                    } catch (InterruptedException e1) {
                        e1.printStackTrace();
                    }
                    shell.getDisplay().asyncExec( new Runnable() {
                        public void run() {
                          button1.setEnabled(true);
                          button2.setEnabled(false);
                          button3.setEnabled(false);
                        }
                    });
                }
            } ).start();
        }
    });

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

}

}

+3

, , . , setEnabled, . GridLayout GridData .exclude setVisible. , SWT Snippets .

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

public class App2 {

    public static void main(final String[] args) {
        final Display display = new Display();
        final Shell shell = new Shell(display);
        shell.setLayout(new GridLayout(3, false));
        final Button button1 = new Button(shell, SWT.PUSH);
        button1.setText("Click");
        final Button button2 = new Button(shell, SWT.PUSH);
        button2.setText("Me");
        final Button button3 = new Button(shell, SWT.PUSH);
        button3.setText("Dude");

        button1.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, false));
        button2.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, false));
        button3.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, false));
        button2.setEnabled(false);
        button3.setEnabled(false);

        button1.addSelectionListener(new SelectionAdapter() {
            @Override
            public void widgetSelected(final SelectionEvent e) {
                button1.setEnabled(false);
                button2.setEnabled(true);
                button3.setEnabled(false);
            }
        });

        button2.addSelectionListener(new SelectionAdapter() {
            @Override
            public void widgetSelected(final SelectionEvent e) {
                button1.setEnabled(false);
                button2.setEnabled(false);
                button3.setEnabled(true);
            }
        });

        button3.addSelectionListener(new SelectionAdapter() {
            @Override
            public void widgetSelected(final SelectionEvent e) {
                button1.setEnabled(true);
                button2.setEnabled(false);
                button3.setEnabled(false);
            }
        });

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

    }
}
0

I'm not sure if you have problems turning buttons on / off or setting a delay between the thread of execution.

I modified the Jared code above to perform both of these operations. Please take a look at this and let me know if this is what you were looking for.

Greetings. :-)

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

public class app1 {

    public static void main(final String[] args) {
        final Display display = new Display();
        final Shell shell = new Shell(display);
        shell.setLayout(new GridLayout(3, false));
        final Button button1 = new Button(shell, SWT.PUSH);
        button1.setText("Click");
        final Button button2 = new Button(shell, SWT.PUSH);
        button2.setText("Me");
        final Button button3 = new Button(shell, SWT.PUSH);
        button3.setText("Dude");

        button1.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, false));
        button2.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, false));
        button3.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, false));

        button2.setEnabled(false);
        button3.setEnabled(false);

        button1.addSelectionListener(new SelectionAdapter() {
            @Override
            public void widgetSelected(final SelectionEvent e) {
                button1.setEnabled(false);
                button2.setEnabled(true);
                button3.setEnabled(true);

                new Runnable() {
                    public void run() {

                        try {
                            // Do your operation here.
                            //
                            // Dummy sleep performed here instead.
                            Thread.sleep(1000);
                        } catch (InterruptedException e1) {
                            e1.printStackTrace();
                        }

                    }
                }.run();

                button1.setEnabled(true);
                button2.setEnabled(false);
                button3.setEnabled(false);
            }
        });

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

    }
}
0
source

Source: https://habr.com/ru/post/1713494/

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