Exceptions in designer 4.1.0 after upgrading to eclipse 3.1

[Paul.Helster]

After a long break under the hot sun and in the pool, I came back to my app and decided to port it to Eclipse 3.1, and installed the latest SWT-Designer plugin. Now most of my form-based UI elements do not load in the designer. I get this exception on most of them (notice that I use forms a lot). Will you need sample classes?

!ENTRY com.swtdesigner 4 4 2005-07-20 10:05:48.952
!MESSAGE Designer internal error: null
!STACK 0
java.lang.NullPointerException
at com.swtdesigner.model.swt.forms.control.FormsSectionInfo.createSingleControl(FormsSectionInfo.java:106)
at com.swtdesigner.model.swt.widgets.control.ControlInfo.createControl(ControlInfo.java:413)
at com.swtdesigner.model.swt.widgets.composite.AbstractCompositeInfo.createControl(AbstractCompositeInfo.java:269)
at com.swtdesigner.model.swt.forms.control.FormsExpandableCompositeInfo.createControl(FormsExpandableCompositeInfo.java:196)
at com.swtdesigner.model.swt.forms.control.FormsSectionInfo.createControl(FormsSectionInfo.java:111)
at com.swtdesigner.model.swt.widgets.composite.AbstractCompositeInfo.createControl(AbstractCompositeInfo.java:282)
at com.swtdesigner.model.swt.widgets.composite.ThisCompositeInfo.createControl(ThisCompositeInfo.java:99)
at com.swtdesigner.model.swt.widgets.composite.AbstractCompositeInfo.createControl(AbstractCompositeInfo.java:266)
at com.swtdesigner.model.JavaInfo.notifyPropertyChanged(JavaInfo.java:5768)
at com.swtdesigner.model.swt.widgets.control.ControlInfo.notifyPropertyChanged(ControlInfo.java:222)
at com.swtdesigner.model.JavaInfo.notifyPropertyChanged(JavaInfo.java:5753)
at com.swtdesigner.gef.common.property.DesignerEditorPropertyComposite.handleRootNodeSelected(DesignerEditorPropertyComposite.java:535)
at com.swtdesigner.gef.common.property.DesignerEditorPropertyComposite.updatePropertyComposite(DesignerEditorPropertyComposite.java:718)
at com.swtdesigner.gef.DesignerEditor.parseCompilationUnit(DesignerEditor.java:999)
at com.swtdesigner.gef.DesignerEditor.handleActivate(DesignerEditor.java:900)
at com.swtdesigner.gef.DesignerEditor.handleActivate(DesignerEditor.java:866)
at com.swtdesigner.editors.MultiPageEditor.showDesignEditor(MultiPageEditor.java:325)
at com.swtdesigner.editors.MultiPageEditor$2.widgetSelected(MultiPageEditor.java:168)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:90)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:843)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:867)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:852)
at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:660)
at org.eclipse.swt.custom.CTabFolder.setSelection(CTabFolder.java:3138)
at org.eclipse.swt.custom.CTabFolder.onMouse(CTabFolder.java:1922)
at org.eclipse.swt.custom.CTabFolder$1.handleEvent(CTabFolder.java:288)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:843)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3080)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2713)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1699)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1663)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:367)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:143)
at org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplication.java:103)
at org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:226)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:376)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:163)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.core.launcher.Main.invokeFramework(Main.java:334)
at org.eclipse.core.launcher.Main.basicRun(Main.java:278)
at org.eclipse.core.launcher.Main.run(Main.java:973)
at org.eclipse.core.launcher.Main.main(Main.java:948)

[Paul.Helster]

Code: Select all

package testWidgets2;

import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FormLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.forms.widgets.FormToolkit;
import org.eclipse.ui.forms.widgets.Section;

public class TestSomething extends Composite {

  private FormToolkit toolkit;

  public TestSomething(Composite parent, int style) {
  super(parent, style);
  createContent(parent);
  }

  private void createContent(Composite parent) {

  setBackground(Display.getCurrent().getSystemColor(SWT.COLOR_WHITE));
  setLayout(new FormLayout());
  this.toolkit = new FormToolkit(parent.getDisplay());
  this.toolkit.adapt(this);
  this.toolkit.paintBordersFor(this);

  Section overviewSection = toolkit.createSection(this,Section.TITLE_BAR);
  }

  public void dispose() {
  super.dispose();
  }

  protected void checkSubclass() {
  }
}

[Eric Clayberg]

Here's a new build that should fix the problem.

[Paul.Helster]

Ok, it works now.

And I am impressed with what I see: my custom-drawn canvas-based controls render in the designer! Amazing!

There is one more now that I will investigate and try to isolate into simple code.

[Eric Clayberg]

And I am impressed with what I see: my custom-drawn canvas-based controls render in the designer! Amazing!

Yes. We have been working very hard on improving our support for custom SWT widgets as well as SWT visual inheritance.

We're not quite done yet, so the current v4.1.1 builds are somewhat experimental (we haven't put them on our download page yet).