两个Eclipse UI Form部分可以抓住多余的垂直空间并正确折叠？

Question

我正在尝试创建一个Eclipse Form,它有三个可折叠部分,一个固定大小,另外两个应该抓住编辑器窗口中所有剩余的垂直空间,这样,当其中一个底部折叠时,另一个将填充所有可用空间.

我已阅读形式的文章,尝试了许多变化grabExcessVerticalSpace和SWT.FILL的和几乎一切的GridData的部分所提供的,但没有运气.我也试图在复合材料中嵌套部分客户端grabExcess...Space,但这也无济于事.调用layout()没有帮助,折叠部分时形式回流,折叠第一部分工作正常.

这是一个包含三个部分的表单的代码,但是其中两个底部部分在折叠时只放弃了它们的一小部分空间,而不是我想要的所有部分:

import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.ui.forms.IManagedForm;
import org.eclipse.ui.forms.SectionPart;
import org.eclipse.ui.forms.editor.FormEditor;
import org.eclipse.ui.forms.editor.FormPage;
import org.eclipse.ui.forms.events.ExpansionAdapter;
import org.eclipse.ui.forms.events.ExpansionEvent;
import org.eclipse.ui.forms.widgets.FormToolkit;
import org.eclipse.ui.forms.widgets.Section;

public class SectionFormPage extends FormPage {
    private IManagedForm managedForm;

    public SectionFormPage(FormEditor editor) {
        super(editor, "sectionEditor", "title");
    }

    protected void createFormContent(IManagedForm managedForm) {
        this.managedForm = managedForm;
        FormToolkit toolkit = managedForm.getToolkit();
        Composite body = managedForm.getForm().getBody();

        body.setLayout(new GridLayout());

        createSectionWithButton(toolkit, body, new GridData(SWT.FILL, SWT.FILL, true, false));
        createSectionWithButton(toolkit, body, new GridData(SWT.FILL, SWT.FILL, true, true));
        createSectionWithButton(toolkit, body, new GridData(SWT.FILL, SWT.FILL, true, true));

        body.layout();
    }

    private void createSectionWithButton(FormToolkit toolkit, final Composite body, final GridData layoutData) {
        Section section = createSection(toolkit, body, "Section");
        section.setLayoutData(layoutData);
        section.setClient(toolkit.createButton(section, "button", SWT.NONE));
    }

    private Section createSection(final FormToolkit toolkit, final Composite body, String title) {
        Section section = toolkit.createSection(body, Section.TITLE_BAR | Section.TWISTIE | Section.EXPANDED);
        section.setText(title);
        managedForm.addPart(new SectionPart(section));
        section.addExpansionListener(new ExpansionAdapter() {
            public void expansionStateChanged(ExpansionEvent e) {
                managedForm.reflow(true);
            }
        });
        return section;
    }
}

有什么指针吗？对于章节或其父母或客户,甚至应该指定哪种布局？先谢谢!

Answer 1

我终于让一位同事看了这个,我们一起找到了一个解决方案,诀窍就是简单地修改一下GridData而不是 grabExcessVerticalSpace当折叠部分时:

private void createSectionWithButton(FormToolkit toolkit, final Composite body, final GridData layoutData) {
    final Section section = createSection(toolkit, body, "Section", layoutData.grabExcessVerticalSpace);
    section.setLayoutData(layoutData);
    section.setClient(toolkit.createButton(section, "button", SWT.NONE));
}

private Section createSection(final FormToolkit toolkit, final Composite body, String title,
        boolean shouldGiveUpVerticalSpaceWhenFolded) {
    final Section section = toolkit.createSection(body, Section.TITLE_BAR | Section.TWISTIE | Section.EXPANDED);
    section.setText(title);
    managedForm.addPart(new SectionPart(section));
    if (shouldGiveUpVerticalSpaceWhenFolded) {
        section.addExpansionListener(new ExpansionAdapter() {
            public void expansionStateChanged(ExpansionEvent e) {
                GridData gridData = (GridData) section.getLayoutData();
                gridData.grabExcessVerticalSpace = e.getState();
            }
        });
    }
    section.addExpansionListener(new ExpansionAdapter() {
        public void expansionStateChanged(ExpansionEvent e) {
            managedForm.reflow(true);
        }
    });
    return section;
}

我只是坚持我的想法,必须有可能以某种方式定义这个布局.我仍然有兴趣知道它是不是.