Eclipse Form设计指南之定制布局
2008-01-05 08:19:44 来源:WEB开发网核心提示:3、定制布局 Eclipse Form提供了2个新的布局(1)TableWrapLayout·问题:假如将上例中超链接的文本设置的足够长link.setText("This is an example of a form that is mUCh longer and will need to wrap.&q
3、定制布局
Eclipse Form提供了2个新的布局
(1)TableWrapLayout
·问题:假如将上例中超链接的文本设置的足够长
link.setText("This is an example of a form that is mUCh longer and will need to wrap.");
即使设置了SWT.WRAP,文本内容不会自动WRAP,这是因为体内容的布局是GridLayout
·Eclipse Form提供替代的布局TableWrapLayout:类似于GridLayout,但是具有象Html表格一样自动WRAP功能
·下面是解决超链接文本自动WRAP的例子:
public void createPartControl(Composite parent) {
toolkit = new FormToolkit(parent.getDisplay());
form = toolkit.createScrolledForm(parent);
form.setText("Hello, Eclipse Forms");
Composite body = form.getBody();
TableWrapLayout layout = new TableWrapLayout();
body.setLayout(layout);
Hyperlink link = toolkit.createHyperlink(body, "Click here.", SWT.WRAP);
link.addHyperlinkListener(new HyperlinkAdapter() {
public void linkActivated(HyperlinkEvent e) {
System.out.PRintln("Link activated!");
}
});
layout.numColumns = 2;
link.setText("This is an example of a form that is much longer and will need to wrap.");
TableWrapData td = new TableWrapData();
td.colspan = 2;
link.setLayoutData(td);
Label label = toolkit.createLabel(body, "Text field label:");
Text text = toolkit.createText(body, "");
td = new TableWrapData(TableWrapData.FILL_GRAB);
text.setLayoutData(td);
text.setData(FormToolkit.KEY_DRAW_BORDER, FormToolkit.TEXT_BORDER);
Button button = toolkit.createButton(body,"An example of a checkbox in a form", SWT.CHECK);
td = new TableWrapData();
td.colspan = 2;
button.setLayoutData(td);
toolkit.paintBordersFor(body);
}
·下面是程序变化的地方:
1) TableWrapLayout替代GridLayout
2) 使用TableWrapData来提供布局数据信息
3) 设置的属性使用colspan、rowspan等来源于HTML表格单元的属性
·要注重的是:需要自动WRAP的控件,需要设置成SWT.WRAP风格
(2)ColumnLayout
·ColumnLayout是Eclipse Form提供的另一个定制布局
·ColumnLayout的布局方式是从上到下,从左到右
·在变化Form的宽度时,会自动调整控件列数以适应Form的宽度
·ColumnLayout的设置很简单,通常只要设置列数的范围(缺省是1-3)
·在后面的相关部分会给出使用的例子
赞助商链接