JFaceダイアログのレイアウトに関する問題、ウィンドウの境界の外に描画されたウィジェット

Question

私は、左側にスクロールパネルがあり、右側にキャンバスがあり、利用可能なスペースを埋めるが、カバーされていないボタンバーで上に移動します。私が抱えている問題は、私の例で見ることができることです。コンポジットは、無制限にスペースを取っていると思っているようです。何がどのように動作するのか理解できません。

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

GridDataとLayout秒でScrolledComposite#setMinSize()といくつかのマイナーな問題を呼び出していないから始まる、ここで問題がいくつかありました。

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(); 
    } 
}