Description Michael Haywood 2017-07-26 10:49:38 EDT

I've been using SWT and have found an issue.

When selecting and deselecting check boxes and maximizing the window it will cause the icon of the first button to be set even though it is null. Also the layout of the text on the buttons can end up incorrect.

To recreate the error:

Select checkbox 1
Deselect checkbox 1
Select checkbox 3
Maximize the window
The icon for checkbox 1 should be null (empty) but instead it has the cross icon.


 public static void main(String[] args) {
       final Display d = new Display();
       Shell s = new Shell(d);
       s.setLayout(new GridLayout(2, false));
       s.setSize(500, 500);

       new Label(s, SWT.NONE).setText("C");
       final Button c = new Button(s, SWT.CHECK);

       new Label(s, SWT.NONE).setText("L1");
       final Button b = new Button(s, SWT.PUSH | SWT.FLAT);
       b.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));
       b.setText("Button 1");
       b.setEnabled(false);

       new Label(s, SWT.NONE).setText("C2");
       final Button c2 = new Button(s, SWT.CHECK);

       new Label(s, SWT.NONE).setText("L2");
       final Button b2 = new Button(s, SWT.PUSH | SWT.FLAT);
       b2.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));
       b2.setImage(null);
       b2.setText("Button 2");
       b2.setEnabled(false);

       new Label(s, SWT.NONE).setText("C3");
       final Button c3 = new Button(s, SWT.CHECK);

       new Label(s, SWT.NONE).setText("L3");
       final Button b3 = new Button(s, SWT.PUSH | SWT.FLAT);
       b3.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));
       b3.setText("Button 3");
       b3.setEnabled(false);

       c.addSelectionListener(new SelectionAdapter() {
           @Override
           public void widgetSelected(SelectionEvent e) {
               if (!b.isEnabled()) {
                   b.setImage(d.getSystemImage(SWT.ICON_ERROR));
                   b.setEnabled(true);
               } else {
                   b.setImage(null);
                   b.setEnabled(false);
               }
           }
       });

       c2.addSelectionListener(new SelectionAdapter() {
           @Override
           public void widgetSelected(SelectionEvent e) {
               if (!b2.isEnabled()) {
                   b2.setImage(d.getSystemImage(SWT.ICON_ERROR));
                   b2.setEnabled(true);
               } else {
                   b2.setImage(null);
                   b2.setEnabled(false);
               }
           }
       });

       c3.addSelectionListener(new SelectionAdapter() {
           @Override
           public void widgetSelected(SelectionEvent e) {
               if (!b3.isEnabled()) {
                   b3.setImage(d.getSystemImage(SWT.ICON_ERROR));
                   b3.setEnabled(true);
               } else {
                   b3.setImage(null);
                   b3.setEnabled(false);
               }
           }
       });

       s.open();
       while (!s.isDisposed()) {
           if (!d.readAndDispatch())
               d.sleep();
       }
       d.dispose();
   }