love fish大鵬一曰同風(fēng)起，扶搖直上九萬(wàn)里

(樣圖沒(méi)有貼上，不好意思)
1、Eclipse中swt的配置
建議配置：jdk1.4.2以及eclipse3.1
在代碼中調(diào)用swt控件之前，首先建立一個(gè)項(xiàng)目，然后選擇該項(xiàng)目的properties -> Java Build Path，將standard Widget ToolKit加入到Library頁(yè)當(dāng)中。如下圖所示：
?接下來(lái)可以建立第一個(gè)eclipse小程序，新建一個(gè)class，并且在該class所對(duì)應(yīng)的代碼中輸入如下程序，其中package以及class名稱根據(jù)實(shí)際情況來(lái)確定名稱。
package mypakage;
import org.eclipse.swt.widgets.*;
import org.eclipse.swt.*;
/*導(dǎo)入需要的類庫(kù)*/
public class Myfrm1 {
public Myfrm1() {
super();
}
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
/*shell為一個(gè)窗口對(duì)象*/
Label label = new Label(shell, SWT.NONE);
label.setText("Hello, World!");? /*創(chuàng)建一個(gè)標(biāo)簽對(duì)象并且設(shè)置標(biāo)題文字*/
label.pack();
shell.pack();
shell.open();? /*打開(kāi)并顯示窗口*/
while(!shell.isDisposed())
if(!display.readAndDispatch())
??? display.sleep();? /*在窗口沒(méi)有銷毀之前，顯示對(duì)象一直處于等待狀態(tài)*/

display.dispose();? /*否則，銷毀對(duì)象，釋放對(duì)象所占據(jù)的資源*/
label.dispose();
}
}
運(yùn)行上述代碼（run -> debug -> swt application）將產(chǎn)生如下所示的一個(gè)窗口
2、button的使用
按鈕可能的類型有很多，例如：
SWT.BORDER? 含有邊框的按鈕
SWT.CHECK? 復(fù)選按鈕
SWT.PUSH? 普通按鈕
SWT.RADIO? 單選按鈕
3、Text的使用
文本框的類型也有很多種選擇，例如：
SWT.BORDER 含有邊框
SWT.READ_ONLY 只讀
下圖為包含按鈕以及文本框的窗口
設(shè)計(jì)上述窗口所對(duì)應(yīng)的代碼為：
package mypakage;
import org.eclipse.swt.widgets.*;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.*;
import org.eclipse.swt.layout.*;
public class Myfrm1 {
public Myfrm1() {
super();
}
public static void main(String[] args) {
Display display = new Display( );
??????? Shell shell = new Shell(display);
??????? shell.setSize(300, 200);
??????? shell.setLayout(new RowLayout( ));
??????? shell.setText("Button Example");
??????? final Button button = new Button(shell, SWT.BORDER);
??????? button.setText("Click Me");
??????? final Text text = new Text(shell, SWT.BORDER);??
??????? shell.open( );

??????? while(!shell.isDisposed( )) {
?????????????? if(!display.readAndDispatch( )) display.sleep( );
??????? }
??????? display.dispose( );
}
}
如果想對(duì)控件的位置以及大小進(jìn)行精確的設(shè)置，可以使用setBounds(x, y, width, height)方法來(lái)取代shell.setLayout(new RowLayout( ))。例如：button.setBounds(80, 80, 90, 20);
button的監(jiān)聽(tīng)及事件處理
對(duì)按鈕單擊事件處理的代碼：
??????? button.addSelectionListener(new SelectionListener( )
??????? {
?????????????? public void widgetSelected(SelectionEvent event)
?????????????? {
???????????????????? text.setText("No worries!");
?????????????? }
?????????????? public void widgetDefaultSelected(SelectionEvent event)

?????????????? {
???????????????????? text.setText("No worries!");
?????????????? }
??????? });

將以上代碼加入到shell.open之前，當(dāng)點(diǎn)擊按鈕時(shí)產(chǎn)生以下效果：
分析：由于為button按鈕增加了一個(gè)監(jiān)聽(tīng)器，按鈕時(shí)刻處于被“監(jiān)控”的狀態(tài)，當(dāng)按鈕控件被選擇（點(diǎn)擊）既選擇事件發(fā)生時(shí)，對(duì)文本控件進(jìn)行賦值”No worries”。
根據(jù)監(jiān)聽(tīng)事件的原理，設(shè)計(jì)如下程序，該程序能夠獲得鼠標(biāo)的X坐標(biāo)，顯示在文本框中：
package mypakage;
import org.eclipse.swt.widgets.*;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.*;
import org.eclipse.swt.layout.*;
public class Myfrm1 {
public Myfrm1() {
super();
}
public static void main(String[] args) {
Display display = new Display( );
??????? Shell shell = new Shell(display);
??????? shell.setSize(300, 200);
??????? shell.setLayout(new RowLayout( ));
??????? final Text text = new Text(shell, SWT.SHADOW_IN);

??????? shell.addMouseMoveListener(new MouseMoveListener( )
??????? {
?????????????? public void mouseMove(MouseEvent e)
?????????????? {
???????????????????? Integer y=new Integer(e.x);? /*將x坐標(biāo)轉(zhuǎn)換為Integer類型的對(duì)象*/
???????????????????? text.setText(y.toString());
?????????????? }
??????? });

??????? shell.open( );
??????? while(!shell.isDisposed( )) {
?????????????? if(!display.readAndDispatch( )) display.sleep( );
??????? }
??????? display.dispose( );
}
}
監(jiān)聽(tīng)方式：
ControlListener 用于處理移動(dòng)以及尺寸變化

FocusListener 用于處理得到焦點(diǎn)以及失去焦點(diǎn)

KeyListener 處理按鍵的輸入

MouseListener , MouseMoveListener, MouseTrackListener 對(duì)鼠標(biāo)的動(dòng)作進(jìn)行處理

SelectionListener 處理控件的選擇行為（包括按鈕的點(diǎn)擊）

注意：監(jiān)聽(tīng)方式與其所能夠處理的事件具有一定的關(guān)聯(lián)性，既監(jiān)聽(tīng)方式?jīng)Q定了所能夠處理事件的種類，例如：

??????? shell.addMouseListener(new MouseListener( )
??????? {
??????????? public void mouseMove(MouseEvent e)
?????????? {text.setText("mousemove");}
?????????????? public void mouseDoubleClick(MouseEvent e)
?????????????? {text.setText("mousedbclc");}
?????????????? public void mouseDown(MouseEvent e)
?????????????? {}
?????????????? public void mouseUp(MouseEvent e)
?????????????? {}
??????? });

你會(huì)發(fā)現(xiàn)在鼠標(biāo)移動(dòng)時(shí)，text.setText("mousemove");始終不能夠執(zhí)行；并且mouseDown、mouseUp事件不能夠省略，原因就在于MouseListener只能處理mouseDoubleClick、mouseDown、mouseUp三類事件，而且這三類事件不能夠分離。
3、List控件
List控件的樣式包括：
SWT.BORDER 含有邊框

SWT.H_SCROLL 含有水平滾動(dòng)條

SWT.V_SCROLL 含有垂直滾動(dòng)條

SWT.SINGLE 允許單選

SWT.MULTI 允許復(fù)選

若要?jiǎng)?chuàng)建一個(gè)含有從11個(gè)元素的List，可以通過(guò)以下代碼來(lái)實(shí)現(xiàn)
final List list = new List (shell, SWT.SINGLE);
for (int i=0;i<=10;i++)
?? list.add("item"+i);

?

以下實(shí)例能夠判斷List控件中所選擇的選項(xiàng)，并且輸出顯示在控制臺(tái)中：
package mypakage;
import org.eclipse.swt.widgets.*;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.*;
import org.eclipse.swt.layout.*;
public class Myfrm1 {
public Myfrm1() {
super();
}
public static void main(String[] args) {
??????? Display display = new Display ( );
??????? Shell shell = new Shell (display);
??????? shell.setText("List Example");
??????? shell.setSize(300, 200);
??????? shell.setLayout(new FillLayout(SWT.VERTICAL));
??????? final List list = new List (shell, SWT.BORDER | SWT.MULTI | SWT.V_SCROLL);??????????
??????? for (int loopIndex = 0; loopIndex < 100; loopIndex++){
??????????? list.add("Item " + loopIndex);
?????????? }
??????? list.addSelectionListener(new SelectionListener( )
??????? {
?????????? public void widgetSelected(SelectionEvent event)
?????????? {
??????????????? int? selections[] = list.getSelectionIndices ( );
??????????????? String outText = "";
??????????????? for (int loopIndex = 0; loopIndex < selections.length;
??????????????????? loopIndex++) outText += selections[loopIndex] + " ";
??????????????? System.out.println ("You selected: " + outText);
????????????? }
?????????? public void widgetDefaultSelected(SelectionEvent event)
?????????? {
??????????????? int [] selections = list.getSelectionIndices ( );
??????????????? String outText = "";
??????????????? for (int loopIndex = 0; loopIndex < selections.length; loopIndex++)
??????????????????? outText += selections[loopIndex] + " ";
?????????????? System.out.println ("You selected: " + outText);
???????????? }
????????? });
????????? shell.open ( );
????????? while (!shell.isDisposed ( )) {
????????????? if (!display.readAndDispatch ( )) display.sleep ( );
????????? }
????????? display.dispose ( );
}
}

效果圖：
?

You selected: 4 5 6 7 8 9 10
分析：list.getSelectionIndices ( )方法將會(huì)獲得被選擇項(xiàng)目的集合， selections[]或者[] elections表示動(dòng)態(tài)一維數(shù)組。

4、Menu控件
建立菜單的一般步驟為：
1、在建立菜單時(shí)，首先需要建立一個(gè)菜單欄，需要使用SWT.BAR屬性
Menu menuBar = new Menu(shell, SWT.BAR);

2、在菜單欄的基礎(chǔ)之上，創(chuàng)建下拉菜單的所對(duì)應(yīng)的頂級(jí)菜單項(xiàng)，需要使用SWT.CASCADE屬性
fileMenuHeader = new MenuItem(menuBar, SWT.CASCADE);
fileMenuHeader.setText("&File");

3、建立與頂級(jí)菜單項(xiàng)相關(guān)的下拉式菜單
dropMenu1 = new Menu(shell, SWT.DROP_DOWN);

4、將頂級(jí)菜單項(xiàng)與下拉菜單關(guān)聯(lián)
MenuHeader1.setMenu(dropMenu1);

5、為下拉菜單添加子菜單項(xiàng)
dropitem1= new MenuItem(dropMenu1, SWT.PUSH);
dropitem1.setText("open");
…
…

6、最后，在窗口中指定需要顯示的菜單欄
shell.setMenuBar(menuBar);

?

菜單的監(jiān)聽(tīng)及事件
參照按鈕的監(jiān)聽(tīng)以及事件，設(shè)計(jì)如下程序，當(dāng)點(diǎn)擊 File子菜單下的“open”時(shí)，在文本框中顯示“click open menu!”
dropitem1.addSelectionListener(new SelectionListener()
?? {
????? public void widgetSelected(SelectionEvent event)
????? {
????? text.setText("click open menu!");
????? }
????? public void widgetDefaultSelected(SelectionEvent event)
????? {
????? text.setText("click open menu!");
????? }
?? });
?

5、使用工具欄toobar
建立工具欄可以通過(guò)如下方式：ToolBar toolbar = new ToolBar(shell, SWT.NONE);
在工具欄的基礎(chǔ)之上創(chuàng)建工具欄子按鈕，并且設(shè)置子按鈕的標(biāo)題：

ToolItem item1 = new ToolItem(toolbar, SWT.PUSH);
item1.setText("item1");

例如：
??????? ToolBar toolbar = new ToolBar(shell, SWT.NONE);
??????? ToolItem item1 = new ToolItem(toolbar, SWT.PUSH);
??????? item1.setText("item1");
??????? ToolItem item2 = new ToolItem(toolbar, SWT.PUSH);
??????? item2.setText("item2");

?

工具欄的監(jiān)聽(tīng)及事件
實(shí)例：創(chuàng)建一個(gè)監(jiān)聽(tīng)對(duì)象，將該監(jiān)聽(tīng)對(duì)象應(yīng)用于每一個(gè)按鈕，最終來(lái)判斷鼠標(biāo)點(diǎn)擊的是哪一個(gè)按鈕，效果圖如下。
??????????? Listener listener = new Listener( ) {
??????????????? public void handleEvent(Event event) {
??????????????????? ToolItem item =(ToolItem)event.widget;
??????????????????? String string = item.getText( );
??????????????????? text.setText("You selected:" + string);?????????????? }
??????????? };
??????????? item1.addListener(SWT.Selection, listener);
??????????? item2.addListener(SWT.Selection, listener);
??????????? item3.addListener(SWT.Selection, listener);
item4.addListener(SWT.Selection, listener);

?

6、滾動(dòng)條slider的使用
滾動(dòng)條分為有邊框、垂直、水平三種類型，利用slider.setBounds方法可以指定滾動(dòng)條所在的位置。
滾動(dòng)條所能夠處理事件的包括：
SWT.ARROW_DOWN 向下或向右按鈕被點(diǎn)擊

SWT.ARROW_UP 向左或向上按鈕被點(diǎn)擊

SWT.DRAG? 滑塊按鈕被托動(dòng)

SWT.END 滑塊到達(dá)終點(diǎn)

SWT.HOME 滑塊到達(dá)起點(diǎn)

SWT.PAGE_DOWN 下方或右側(cè)的滾動(dòng)條被點(diǎn)擊

SWT.PAGE_UP 上方或左側(cè)的滾動(dòng)條被點(diǎn)擊
實(shí)例：根據(jù)滑塊的位置移動(dòng)按鈕位置
??????? slider.addListener(SWT.Selection, new Listener( ) {

????????? public void handleEvent(Event event) {

??????????? switch(event.detail) {

?????????????? case SWT.ARROW_DOWN: button.setBounds(slider.getSelection(),0,20,10);

??????????????????????? break;

?????????????? case SWT.ARROW_UP:button.setBounds(slider.getSelection(),0,20,10);

??????????????????????? break;

?????????????? case SWT.DRAG:button.setBounds(slider.getSelection(),0,20,10);

??????????????????????? break;

?????????????? case SWT.END:button.setBounds(slider.getSelection(),0,20,10);

??????????????????????? break;

?????????????? case SWT.HOME:button.setBounds(slider.getSelection(),0,20,10);

??????????????????????? break;

?????????????? case SWT.PAGE_DOWN:button.setBounds(slider.getSelection(),0,20,10);

??????????????????????? break;

?????????????? case SWT.PAGE_UP:button.setBounds(slider.getSelection(),0,20,10);

??????????????????????? break;

??????????????????? }
??????????? }

});

?

7、樹形控件Tree
樹形控件使用的方法為，首先創(chuàng)建一個(gè)Tree類型的對(duì)象，其次在該對(duì)象的基礎(chǔ)之上繼續(xù)擴(kuò)展節(jié)點(diǎn)，以及擴(kuò)展節(jié)點(diǎn)的子節(jié)點(diǎn)。
final Tree? tree = new Tree(shell, SWT.BORDER);
可以利用tree.setSize方法來(lái)改變樹形控件的大小。在創(chuàng)建節(jié)點(diǎn)時(shí)，需要指明該節(jié)點(diǎn)所依賴的父節(jié)點(diǎn)的名稱，如TreeItem item0 = new TreeItem(tree, 0);，那么item0將成為tree對(duì)象中的0級(jí)（頂級(jí)）節(jié)點(diǎn)。
如下程序?qū)⒃趖ree對(duì)象的基礎(chǔ)之上產(chǎn)生9個(gè)節(jié)點(diǎn)：
??????? final Tree tree = new Tree(shell, SWT.BORDER);

??????? tree.setSize(290, 290);

??????? for(int loopIndex1 = 2000; loopIndex1 <= 2008; loopIndex1++) {

??????????? TreeItem item0 = new TreeItem(tree, 0);

??????????? item0.setText("Year " + loopIndex1);

??????? }
?
在上述實(shí)例的基礎(chǔ)上為每一個(gè)0級(jí)節(jié)點(diǎn)的基礎(chǔ)上擴(kuò)展出12個(gè)節(jié)點(diǎn)：
??????? for(int loopIndex1 = 2000; loopIndex1 <= 2008; loopIndex1++) {

??????????? TreeItem item0 = new TreeItem(tree, 0);

??????????? item0.setText("Year " + loopIndex1);
???????????
??????????? for(int loopIndex2 = 1; loopIndex2 <= 12; loopIndex2++) {
???????????
??????????? TreeItem item1 = new TreeItem(item0, 0);
???????????
??????????? item1.setText("Month " + loopIndex2);
??????????? }

??????? }
?

8、對(duì)話框dialog
對(duì)話框是一個(gè)依托于主窗體的子窗體，如圖所示。
?
例如：當(dāng)在主窗體中點(diǎn)擊按鈕時(shí)，彈出一個(gè)對(duì)話框dialog，當(dāng)關(guān)閉對(duì)話框時(shí)按鈕顯示“dialog is disposed”
?
??????? Display display = new Display( );

??????? final Shell shell = new Shell(display);

??????? shell.setSize(300, 200);

??????? shell.setText("main");
???????
??????? final Button opener = new Button(shell, SWT.PUSH);

??????? opener.setText("Click Me");
???????
??????? opener.setBounds(20, 20, 50, 25);
???????
??????? final Shell dialog = new Shell(shell, SWT.APPLICATION_MODAL |

??????????? SWT.DIALOG_TRIM);
???????
??????? dialog.setText("dialog");
???????
??????? dialog.setBounds(10,10,50,60);
???????
??????? dialog.addDisposeListener(new DisposeListener(){
???????
??????? public void widgetDisposed(DisposeEvent e){

??????? opener.setText("dialog is disposed");
???????
??????? }
??????? });
???????
??????? Listener openerListener = new Listener( ) {

??????????? public void handleEvent(Event event) {

??????????????????? dialog.open( );

??????????? }

??????? };

??????? opener.addListener(SWT.Selection, openerListener);
????????????
??????? shell.open( );
???????
??????? while(!dialog.isDisposed( )) {

??????????? if(!display.readAndDispatch( )) display.sleep( );

??????? }??????

??????? while (!shell.isDisposed( )) {

??????????? if (!display.readAndDispatch( ))

??????????????? display.sleep( );

??????? }

??????? display.dispose( );