SWT(JFace)体验之FormLayout布局

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我是靠谱客的博主丰富钻石，最近开发中收集的这篇文章主要介绍SWT(JFace)体验之FormLayout布局，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

测试代码如下：

复制代码代码如下:

package swt_jface.demo2; 
import org.eclipse.swt.SWT; 
import org.eclipse.swt.layout.FormAttachment; 
import org.eclipse.swt.layout.FormData; 
import org.eclipse.swt.layout.FormLayout; 
import org.eclipse.swt.widgets.Button; 
import org.eclipse.swt.widgets.Display; 
import org.eclipse.swt.widgets.Shell; 
public class FormLayoutSample { 
Display display = new Display(); 
Shell shell = new Shell(display); 
public FormLayoutSample() { 
shell.setLayout(new FormLayout()); 
Button button1 = new Button(shell, SWT.PUSH); 
button1.setText("button1"); 
FormData formData = new FormData(); 
formData.left = new FormAttachment(20); 
formData.top = new FormAttachment(20); 
button1.setLayoutData(formData); 


Button button2 = new Button(shell, SWT.PUSH); 
button2.setText("button number 2"); 

formData = new FormData(); 
formData.left = new FormAttachment(button1, 0, SWT.CENTER); 
formData.top = new FormAttachment(button1, 0, SWT.CENTER); 
button2.setLayoutData(formData); 

// Button button3 = new Button(shell, SWT.PUSH); 
// button3.setText("3"); 
// 
// formData = new FormData(); 
// formData.top = new FormAttachment(button2, 10); 
// formData.left = new FormAttachment(button2, 0, SWT.LEFT); 
// button3.setLayoutData(formData); 
shell.pack(); 
//shell.setSize(500, 600); 
shell.open(); 
while (!shell.isDisposed()) { 
if (!display.readAndDispatch()) { 
display.sleep(); 
} 
} 
display.dispose(); 
} 
public static void main(String[] args) { 
new FormLayoutSample(); 
} 
}

再看一个例子：

复制代码代码如下:

package swt_jface.demo2; 
import org.eclipse.swt.SWT; 
import org.eclipse.swt.graphics.Point; 
import org.eclipse.swt.graphics.Rectangle; 
import org.eclipse.swt.layout.FormAttachment; 
import org.eclipse.swt.layout.FormData; 
import org.eclipse.swt.layout.FormLayout; 
import org.eclipse.swt.widgets.Button; 
import org.eclipse.swt.widgets.Display; 
import org.eclipse.swt.widgets.Event; 
import org.eclipse.swt.widgets.Label; 
import org.eclipse.swt.widgets.List; 
import org.eclipse.swt.widgets.Listener; 
import org.eclipse.swt.widgets.Shell; 
public class Main { 
public static void main(String[] args) { 
Display display = new Display(); 
final Shell shell = new Shell(display); 
Label label = new Label(shell, SWT.WRAP); 
label 
.setText("This is a long text string that will wrap when the dialog is resized."); 
List list = new List(shell, SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL); 
list.setItems(new String[] { "Item 1", "Item2" }); 
Button button1 = new Button(shell, SWT.PUSH); 
button1.setText("Ok"); 
Button button2 = new Button(shell, SWT.PUSH); 
button2.setText("Cancel"); 
final int insetX = 4, insetY = 4; 
FormLayout formLayout = new FormLayout(); 
formLayout.marginWidth = insetX; 
formLayout.marginHeight = insetY; 
shell.setLayout(formLayout); 
Point size = label.computeSize(SWT.DEFAULT, SWT.DEFAULT); 
final FormData labelData = new FormData(size.x, SWT.DEFAULT); 
labelData.left = new FormAttachment(0, 0); 
labelData.right = new FormAttachment(100, 0); 
label.setLayoutData(labelData); 
shell.addListener(SWT.Resize, new Listener() { 
public void handleEvent(Event e) { 
Rectangle rect = shell.getClientArea(); 
labelData.width = rect.width - insetX * 2; 
shell.layout(); 
} 
}); 
FormData button2Data = new FormData(); 
button2Data.right = new FormAttachment(100, -insetX); 
button2Data.bottom = new FormAttachment(100, 0); 
button2.setLayoutData(button2Data); 
FormData button1Data = new FormData(); 
button1Data.right = new FormAttachment(button2, -insetX); 
button1Data.bottom = new FormAttachment(100, 0); 
button1.setLayoutData(button1Data); 
FormData listData = new FormData(); 
listData.left = new FormAttachment(0, 0); 
listData.right = new FormAttachment(100, 0); 
listData.top = new FormAttachment(label, insetY); 
listData.bottom = new FormAttachment(button2, -insetY); 
list.setLayoutData(listData); 
shell.pack(); 
shell.open(); 
while (!shell.isDisposed()) { 
if (!display.readAndDispatch()) 
display.sleep(); 
} 
display.dispose(); 
} 
}