JFace 对话框布局问题，在 window 范围之外绘制的小部件

Question

我正在尝试布置一个对话框，左侧是滚动面板，右侧是 canvas 以填充可用 space 但未被按钮遮盖酒吧。在我的例子中可以看出我遇到的问题是复合材料似乎认为它们有无限量的 space 可以吸引自己，我不明白这应该如何与任何东西一起工作。

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

这里有几个问题，从不调用 ScrolledComposite#setMinSize() 开始，还有 GridData 和 Layouts 的一些小问题。

这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 window 范围之外绘制的小部件

JFace Dialog Layout Issues, Widgets drawn outside of the bounds of the window

java

swt

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jface