Question

我试图布置一个左侧有滚动面板的对话框和右侧的画布，它填充了可用空间但没有被按钮栏遮住。在我的例子中我可以看到的问题是复合材料似乎认为它们有无限的空间来吸引自己，我无法理解它应该如何与任何东西一起工作。 / p>

import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.ScrolledComposite;
import org.eclipse.swt.events.PaintEvent;
import org.eclipse.swt.events.PaintListener;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Canvas;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;

public class FMLDialog extends Dialog
{   
    public FMLDialog(Shell parentShell)
    {
        super(parentShell);
    }


    @Override
    protected void configureShell(Shell shell)
    {
        super.configureShell(shell);
        shell.setSize(new Point(700,500));
        shell.setText("FML");
    }   

    @Override
    public Control createDialogArea(final Composite comp)
    {

        Composite content = (Composite) super.createDialogArea(comp);
        Composite parent = new Composite(content, SWT.NONE);        

        GridLayout gridLayout1 = new GridLayout(1, false);
        gridLayout1.verticalSpacing=10;
        GridLayout gridLayout2 = new GridLayout(2, false);
        parent.setLayout(gridLayout2);
        parent.setLayoutData(new GridData(SWT.FILL, SWT.BEGINNING, true, false));           

        final ScrolledComposite scroll = new ScrolledComposite(parent, SWT.V_SCROLL);
        scroll.setExpandHorizontal(true);
        scroll.setExpandVertical(true);

        Composite optionsPanel = new Composite(scroll, SWT.BORDER);

        optionsPanel.setSize(optionsPanel.computeSize(SWT.DEFAULT, SWT.DEFAULT));
        optionsPanel.setLayout(gridLayout1);
        scroll.setContent(optionsPanel);

        for (int i = 0; i < 200; i++) {
            new Label(optionsPanel, SWT.NONE).setText("this is item " + i);
        }

        scroll.setSize(optionsPanel.computeSize(SWT.DEFAULT, SWT.DEFAULT));

        final Canvas c = new Canvas(parent, SWT.BORDER);
        c.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
        c.addPaintListener(new PaintListener() {

            @Override
            public void paintControl(PaintEvent e) {
                Point size = c.getSize();
                e.gc.drawText("Width: " + size.x + "\nHeight: " + size.y, 5, 5);
                e.gc.drawOval(2, 2, size.x - 4, size.y - 4);
            }
        });

        return content;     

    }

    public static void main(String[] args) {
        Display d = new Display();
        Shell s = new Shell();

        FMLDialog fml = new FMLDialog(s);
        fml.open();
    }

}

Answer 1

此处有几个问题，首先是不调用ScrolledComposite#setMinSize()，还有一些小问题是GridData和Layout。

以下是您的代码的修改版本：

public class FMLDialog extends Dialog
{
    public FMLDialog(Shell parentShell)
    {
        super(parentShell);
    }

    @Override
    protected void configureShell(Shell shell)
    {
        super.configureShell(shell);
        shell.setSize(new Point(700, 500));
        shell.setText("FML");
    }

    @Override
    public Control createDialogArea(final Composite comp)
    {
        Composite content = (Composite) super.createDialogArea(comp);
        content.setLayout(new GridLayout(2, false));
        content.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));

        final ScrolledComposite scroll = new ScrolledComposite(content, SWT.V_SCROLL);
        scroll.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
        scroll.setExpandHorizontal(true);
        scroll.setExpandVertical(true);

        Composite optionsPanel = new Composite(scroll, SWT.BORDER);
        optionsPanel.setLayout(new FillLayout(SWT.VERTICAL));
        optionsPanel.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));

        for (int i = 0; i < 200; i++)
        {
            new Label(optionsPanel, SWT.NONE).setText("this is item " + i);
        }

        scroll.setContent(optionsPanel);
        scroll.setMinSize(optionsPanel.computeSize(SWT.DEFAULT, SWT.DEFAULT));

        final Canvas c = new Canvas(content, SWT.BORDER);
        c.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
        c.addPaintListener(new PaintListener()
        {
            @Override
            public void paintControl(PaintEvent e)
            {
                Point size = c.getSize();
                e.gc.drawText("Width: " + size.x + "\nHeight: " + size.y, 5, 5);
                e.gc.drawOval(2, 2, size.x - 4, size.y - 4);
            }
        });

        return content;
    }

    public static void main(String[] args)
    {
        Display d = new Display();
        Shell s = new Shell();

        FMLDialog fml = new FMLDialog(s);
        fml.open();
    }
}

JFace对话框布局问题，在窗口边界之外绘制的窗口小部件

1 个答案: