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必须先在文件的顶部声明新控件和其他控件，然后才可以将新控件添加到此方法中。
清单 9. 声明新控件public class NewXHTMLFileWizardPage extends WizardPage {
/* Newly added for the page title */
private Text titleText;
// the rest of the class...
}
现在添加文本的 getter。NewXHTMLFileWizard 类将在构建新文件时使用此 getter。getTitle() 方法如下所示：
清单 10. getTitle() 方法 /**
* Gets the HTML title for the new file
*/
public String getTitle() {
return titleText.getText();
}
修改 createControl() 方法以添加标题的新输入控件和标签。新代码如下所示：
清单 11. 修改后的 createControl() 方法 /**
* @see IDialogPage#createControl(Composite)
*/
public void createControl(Composite parent) {
Composite container = new Composite(parent, SWT.NULL);
GridLayout layout = new GridLayout();
container.setLayout(layout);
layout.numColumns = 3;
layout.verticalSpacing = 9;
Label label = new Label(container, SWT.NULL);
label.setText("&Container:");
containerText = new Text(container, SWT.BORDER | SWT.SINGLE);
GridData gd = new GridData(GridData.FILL_HORIZONTAL);
containerText.setLayoutData(gd);
containerText.addModifyListener(new ModifyListener() {
public void modifyText(ModifyEvent e) {
dialogChanged();
}
});
Button button = new Button(container, SWT.PUSH);
button.setText("Browse...");
button.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent e) {
handleBrowse();
}
});
label = new Label(container, SWT.NULL);
label.setText("&File name:");
fileText = new Text(container, SWT.BORDER | SWT.SINGLE);
gd = new GridData(GridData.FILL_HORIZONTAL);
fileText.setLayoutData(gd);
fileText.addModifyListener(new ModifyListener() {
public void modifyText(ModifyEvent e) {
dialogChanged();
}
});
/* Need to add empty label so the next two controls
* are pushed to the next line in the grid. */
label = new Label(container, SWT.NULL);
label.setText("");
/* Adding the custom control here */
label = new Label(container, SWT.NULL);
label.setText("&Title:");
titleText = new Text(container, SWT.BORDER | SWT.SINGLE);
gd = new GridData(GridData.FILL_HORIZONTAL);
titleText.setLayoutData(gd);
titleText.addModifyListener(new ModifyListener() {
public void modifyText(ModifyEvent e) {
dialogChanged();
}
});
/* Finished adding the custom control */
initialize();
dialogChanged();
setControl(container);
}
在将代码添加到 NewXHTMLFileWizard 类中之前，请通过执行先前概述的步骤测试到目前为止的更改。
验证用户输入
用户在新向导的 Title 字段中输入的文本将用作新 HTML 文件的 <title> 元素中的文本。出于本文的目的，该值是必需的，因此需要添加检查输入的代码以确保用户输入的内容是没有问题的。
对 dialogChanged() 方法的修改如下所示：
清单 12. 检验 dialogChanged() 中的输入 /**
* Ensures that both text fields are set.
*/
private void dialogChanged() {
IResource container = ResourcesPlugin.getWorkspace().getRoot()
.findMember(new Path(getContainerName()));
String fileName = getFileName();
String titleText = getTitle();
if (getContainerName().length() == 0) {
updateStatus("File container must be specified");
return;
}
if (container == null
|| (container.getType() & (IResource.PROJECT | IResource.FOLDER)) == 0) {
updateStatus("File container must exist");
return;
}
if (!container.isAccessible()) {
updateStatus("Project must be writable");
return;
}
if (fileName.length() == 0) {
updateStatus("File name must be specified");
return;
}
if (fileName.replace('', '/').indexOf('/', 1) > 0) {
updateStatus("File name must be valid");
return;
}
int dotLoc = fileName.lastIndexOf('.');
if (dotLoc != -1) {
String ext = fileName.substring(dotLoc + 1);
if (ext.equalsIgnoreCase("html") == false) {
updateStatus("File extension must be "html"");
return;
}
}
if (titleText.length() ==0 )
{
updateStatus("Title must be specified");
return;
}
updateStatus(null);
}
(编辑:aniston)
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