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使用Eclipse进行SWT编程（3）

摘要: 使用Eclipse进行SWT编程（3）

8. Widgets

SWT GUI对象是从Widget和Control类继承而来的。Widget对象是基类定义了GUI类的通用方法。Control类是所有窗口GUI类的基类也就是说从Control类继承的组件需要一个窗口或者对话框来显示。

Menu对象也需要一个窗口来显示，但是这个需求间接得到了满足。一个Menu对象需要一个Control对象。

<formulas></formulas>

图4. Widget类层次图

图 4 显示了Widget的类层次图。Widget，Item，ScrollBar和Control类是抽象类。

8.1. Widget事件

Widget事件总结表3。简化起见，表中只包含了事件名称。我们可以很容易的使用Event 想出事件类的名称。同样地，使用Listener得到相关联地Listener地名称。并不是每一事件都有相配地Adapter类。所以，有adapter地事件用粗体表明。我们可以通过Adaptor 来得到对应地adapter名字。
例子:
事件名称是Control，事件类就是ControlEvent，listener类是ControlListener，adaptor 类是ControlAdaptor。

<table class="MsoNormalTable" style="BORDER-RIGHT: silver 1pt outset; BORDER-TOP: silver 1pt outset; BORDER-LEFT: silver 1pt outset; BORDER-BOTTOM: silver 1pt outset; mso-cellspacing: 0cm; mso-padding-alt: 0cm 0cm 0cm 0cm; mso-border-alt: outset silver .75pt" cellspacing="0" cellpadding="0" border="1"><tr style="mso-yfti-irow: 0"><td style="BORDER-RIGHT: black 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: black 1pt inset; PADDING-LEFT: 0cm; BACKGROUND: navy; PADDING-BOTTOM: 0cm; BORDER-LEFT: black 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: black 1pt inset; mso-border-alt: inset black .75pt" colspan="3">

表3. SWT Events

</td></tr><tr style="mso-yfti-irow: 1"><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; BACKGROUND: silver; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; mso-border-alt: inset silver .75pt">

事件名称

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; BACKGROUND: silver; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; mso-border-alt: inset silver .75pt">

窗口组件

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; BACKGROUND: silver; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; mso-border-alt: inset silver .75pt">

产生的时间

</td></tr><tr style="mso-yfti-irow: 2"><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

Arm

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

MenuItem

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

一个菜单项加亮时

</td></tr><tr style="mso-yfti-irow: 3"><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

Control

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

Control, TableColumn, Tracker

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

一个控件被改变大小或者移动时

</td></tr><tr style="mso-yfti-irow: 4"><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

Dispose

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

Widget

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

窗口组件被销毁时

</td></tr><tr style="mso-yfti-irow: 5"><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

Focus

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

Control

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

一个控件得到或者失去焦点时

</td></tr><tr style="mso-yfti-irow: 6"><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

Help

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

Control, Menu, MenuItem

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

用户需要帮助时(例如按F1键)

</td></tr><tr style="mso-yfti-irow: 7"><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

Key

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

Control

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

当控件得到键盘焦点并且一个键按下或者释放时

</td></tr><tr style="mso-yfti-irow: 8"><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

Menu

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

Menu

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

菜单显示或者隐藏时

</td></tr><tr style="mso-yfti-irow: 9"><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

Modify

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

Combo, Text

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

窗口组件的文本被修改时

</td></tr><tr style="mso-yfti-irow: 10"><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

Mouse

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

Control

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

在控件范围内鼠标被按下，释放或者双击时

</td></tr><tr style="mso-yfti-irow: 11"><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

MouseMove

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

Control

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

鼠标越过控件

</td></tr><tr style="mso-yfti-irow: 12"><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

MouseTrack

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

Control

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

鼠标进入，离开或者盘旋在控件上方

</td></tr><tr style="mso-yfti-irow: 13"><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

Paint

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

Control

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

控件需要被重绘时

</td></tr><tr style="mso-yfti-irow: 14"><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

Selection

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

Button, Combo, CoolItem, List, MenuItem, Sash, Scale, ScrollBar, Slider, StyledText, TabFolder, Table, TableColumn, TableTree, Text, ToolItem, Tree

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

一个Item在控件中被选择时

</td></tr><tr style="mso-yfti-irow: 15"><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

Shell

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

Shell

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

Shell被最小化，最大化，激活，钝化或者关闭时

</td></tr><tr style="mso-yfti-irow: 16"><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

Traverse

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

Control

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

控件被遍历(tabbed)时

</td></tr><tr style="mso-yfti-irow: 17"><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

Tree

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

Tree, TableTree

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

一个tree item被收缩或者展开时

</td></tr><tr style="mso-yfti-irow: 18; mso-yfti-lastrow: yes"><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

Verify

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

Text, StyledText

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top">

窗口组件的文本将要被修改时

</td></tr></table>

8.2. 有用的窗口组件

图 5. Control类层次图

所有的Control类都可以有边框。你可以使用SWT.BORDER常量来给控件类增加边框。

<table class="MsoNormalTable" style="WIDTH: 100%; mso-cellspacing: 1.5pt" cellpadding="0" width="100%" border="0"><tr style="mso-yfti-irow: 0"><td style="BORDER-RIGHT: #d4d0c8; PADDING-RIGHT: 0.75pt; BORDER-TOP: #d4d0c8; PADDING-LEFT: 0.75pt; BACKGROUND: #eeeeee; PADDING-BOTTOM: 0.75pt; BORDER-LEFT: #d4d0c8; WIDTH: 11%; PADDING-TOP: 0.75pt; BORDER-BOTTOM: #d4d0c8" width="11%">

</td><td style="BORDER-RIGHT: #d4d0c8; PADDING-RIGHT: 0.75pt; BORDER-TOP: #d4d0c8; PADDING-LEFT: 0.75pt; BACKGROUND: #eeeeee; PADDING-BOTTOM: 0.75pt; BORDER-LEFT: #d4d0c8; WIDTH: 86%; PADDING-TOP: 0.75pt; BORDER-BOTTOM: #d4d0c8" width="86%">

SWT style常量

</td></tr><tr style="mso-yfti-irow: 1; mso-yfti-lastrow: yes"><td style="BORDER-RIGHT: #d4d0c8; PADDING-RIGHT: 0.75pt; BORDER-TOP: #d4d0c8; PADDING-LEFT: 0.75pt; BACKGROUND: #eeeeee; PADDING-BOTTOM: 0.75pt; BORDER-LEFT: #d4d0c8; PADDING-TOP: 0.75pt; BORDER-BOTTOM: #d4d0c8" colspan="2">

一般都需要标明样式常量 (style bit).如果你不知道用哪个常量或者你不想要标明它，你可以使用SWT.NULL。

</td></tr></table>

8.2.1. 按钮

按钮可以具有不同的样式。按钮的样式由style bit决定。表4显示了按钮列表和他们的样式常量。

<table class="MsoNormalTable" style="BORDER-RIGHT: silver 1pt outset; BORDER-TOP: silver 1pt outset; BORDER-LEFT: silver 1pt outset; WIDTH: 301.5pt; BORDER-BOTTOM: silver 1pt outset; mso-cellspacing: 0cm; mso-padding-alt: 0cm 0cm 0cm 0cm; mso-border-alt: outset silver .75pt" cellspacing="0" cellpadding="0" width="402" border="1"><tr style="mso-yfti-irow: 0"><td style="BORDER-RIGHT: black 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: black 1pt inset; PADDING-LEFT: 0cm; BACKGROUND: navy; PADDING-BOTTOM: 0cm; BORDER-LEFT: black 1pt inset; PADDING-TOP: 0cm; BORDER-BOTTOM: black 1pt inset; mso-border-alt: inset black .75pt" colspan="3">

Table 4. SWT按钮style bit常量和例子

</td></tr><tr style="mso-yfti-irow: 1"><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; BACKGROUND: silver; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; WIDTH: 20%; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; mso-border-alt: inset silver .75pt" width="20%">

常量

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; BACKGROUND: silver; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; WIDTH: 27%; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; mso-border-alt: inset silver .75pt" width="27%">

例子

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; BACKGROUND: silver; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; WIDTH: 28%; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; mso-border-alt: inset silver .75pt" width="28%">

描述

</td></tr><tr style="mso-yfti-irow: 2"><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; WIDTH: 20%; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top" width="20%">

SWT.ARROW

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; BACKGROUND: #d4d0c8; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; WIDTH: 27%; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; mso-border-alt: inset silver .75pt" valign="top" width="27%">

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; WIDTH: 28%; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top" width="28%">

一个按钮用于显示弹出对话框。箭头的方向由alignment常量决定。

</td></tr><tr style="mso-yfti-irow: 3"><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; WIDTH: 20%; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top" width="20%">

SWT.CHECK

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; BACKGROUND: #d4d0c8; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; WIDTH: 27%; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; mso-border-alt: inset silver .75pt" valign="top" width="27%">

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; WIDTH: 28%; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top" width="28%">

选择框，可以是图像。

</td></tr><tr style="mso-yfti-irow: 4"><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; WIDTH: 20%; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top" width="20%">

SWT.PUSH

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; BACKGROUND: #d4d0c8; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; WIDTH: 27%; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; mso-border-alt: inset silver .75pt" valign="top" width="27%">

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; WIDTH: 28%; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top" width="28%">

一个按钮

</td></tr><tr style="mso-yfti-irow: 5"><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; WIDTH: 20%; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top" width="20%">

SWT.RADIO

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; BACKGROUND: #d4d0c8; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; WIDTH: 27%; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; mso-border-alt: inset silver .75pt" valign="top" width="27%">

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; WIDTH: 28%; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top" width="28%">

在group中可以使用的单选按钮

</td></tr><tr style="mso-yfti-irow: 6; mso-yfti-lastrow: yes"><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; WIDTH: 20%; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top" width="20%">

SWT.TOGGLE

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; BACKGROUND: #d4d0c8; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; WIDTH: 27%; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; mso-border-alt: inset silver .75pt" valign="top" width="27%">

</td><td style="BORDER-RIGHT: silver 1pt inset; PADDING-RIGHT: 0cm; BORDER-TOP: silver 1pt inset; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: silver 1pt inset; WIDTH: 28%; PADDING-TOP: 0cm; BORDER-BOTTOM: silver 1pt inset; BACKGROUND-COLOR: transparent; mso-border-alt: inset silver .75pt" valign="top" width="28%">

同SWT.PUSH类似, 但是它可以保持按下状态直到第二次单击。

</td></tr></table>