在TabFolder中設置SWT Composite的大小

Question

如何設置選項卡文件夾中Composite的寬度和高度？

PS：setSize and setBounds does not work！

Answer 1

因爲你沒有說過你在何時，在哪裏以及如何設置複合尺寸，所以我假設你正在設置一個事件的大小，以及setSize適合我。

我在Win7，eclipse 4.2和JDK 1.6_b30上。參見示例代碼：

import org.eclipse.swt.SWT; 
import org.eclipse.swt.events.SelectionAdapter; 
import org.eclipse.swt.events.SelectionEvent; 
import org.eclipse.swt.layout.GridData; 
import org.eclipse.swt.layout.GridLayout; 
import org.eclipse.swt.widgets.Button; 
import org.eclipse.swt.widgets.Composite; 
import org.eclipse.swt.widgets.Display; 
import org.eclipse.swt.widgets.Shell; 
import org.eclipse.swt.widgets.TabFolder; 
import org.eclipse.swt.widgets.TabItem; 
import org.eclipse.swt.widgets.Text; 


public class Test 
{ 
    public static void main(String[] args) throws Exception 
    { 
     Display display = new Display(); 
     Shell shell = new Shell(display); 
     shell.setLayout(new GridLayout(1, false)); 

     TabFolder folder = new TabFolder(shell, SWT.TOP); 
     folder.setLayout(new GridLayout()); 
     folder.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true)); 


     TabItem item = new TabItem(folder, SWT.NONE); 
     item.setText("Tab 1"); 

     final Composite composite = new Composite(folder, SWT.BORDER); 
     composite.setLayout(new GridLayout()); 
     composite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false)); 
     Text text = new Text(composite, SWT.BORDER); 
     text.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false)); 
     text.setText("Tab 1"); 
     Button b = new Button(composite, SWT.PUSH); 
     b.setText("Press"); 
     b.addSelectionListener(new SelectionAdapter() { 
      @Override 
      public void widgetSelected(SelectionEvent e) { 
       composite.setSize(23, 43); 
      } 
     }); 

     item.setControl(composite); 

     shell.setSize(300, 200); 
     shell.open(); 
     while (!shell.isDisposed()) { 
      if (!display.readAndDispatch()) 
       display.sleep(); 
     } 
     display.dispose(); 
    } 
} 

Before Pressing the Button

After Pressing the Button

雖然有趕上！只要您調整應用程序的大小，複合材料就會回到的原始尺寸！

---

也有 可能是一個問題，如果你不使用設置大小的任何事件（可能在SWT標籤文件夾了一些bug或功能）。非侵入性的 hack（不需要任何用戶交互）是使用 PaintListener。請參見下面的代碼：

import org.eclipse.swt.SWT; 
import org.eclipse.swt.events.PaintEvent; 
import org.eclipse.swt.events.PaintListener; 
import org.eclipse.swt.layout.GridData; 
import org.eclipse.swt.layout.GridLayout; 
import org.eclipse.swt.widgets.Composite; 
import org.eclipse.swt.widgets.Display; 
import org.eclipse.swt.widgets.Shell; 
import org.eclipse.swt.widgets.TabFolder; 
import org.eclipse.swt.widgets.TabItem; 
import org.eclipse.swt.widgets.Text; 


public class Test 
{ 
    public static void main(String[] args) throws Exception 
    { 
     Display display = new Display(); 
     Shell shell = new Shell(display); 
     shell.setLayout(new GridLayout(1, false)); 

     final TabFolder folder = new TabFolder(shell, SWT.TOP); 
     folder.setLayout(new GridLayout()); 
     folder.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true)); 


     TabItem item = new TabItem(folder, SWT.NONE); 
     item.setText("Tab 1"); 

     final Composite composite = new Composite(folder, SWT.BORDER); 
     composite.setLayout(new GridLayout()); 
     composite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false)); 
     Text text = new Text(composite, SWT.BORDER); 
     text.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false)); 
     text.setText("Tab 1"); 


     folder.addPaintListener(new PaintListener() { 
      public void paintControl(PaintEvent e) { 
       composite.setSize(23, 43); 
      } 
     }); 


     item.setControl(composite); 

     shell.setSize(300, 200); 
     shell.open(); 
     while (!shell.isDisposed()) { 
      if (!display.readAndDispatch()) 
       display.sleep(); 
     } 
     display.dispose(); 
    } 
} 

的PaintListener解決方案是不是一個非常優雅的解決方案，但它適合我的發展環境。