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SWT对话框

对话框,都继承自org.eclipse.swt.widgets.Dialog,有Modal的和Modeless的区分,一般的对话框处理程序如下:

<DialogType>

dlg = new <DialogType>(shell);

dlg.setSomeData(data);

<ReturnType>

returnValue = dlg.open();

if (returnValue == null) {

// User clicked cancel

} else {

// Do something with returnValue

}

对话框主要有以下六种:

1、MessageBox,消息对话框

可定制的对话框样式包括:

标题栏:setText()

消息提示:setMessage()

消息图标类型:style属性,有:SWT.ICON_ERROR,SWT.ICON_INFORMATION,SWT.ICON_QUESTION,SWT.ICON_WARNING,SWT.ICON_WORKING

按钮类型:style属性,有:SWT.OK,SWT.OK | SWT.CANCEL,SWT.YES | SWT.NO,SWT.YES | SWT.NO | SWT.CANCEL,SWT.RETRY | SWT.CANCEL,SWT.ABORT | SWT.RETRY | SWT.IGNORE

对话框返回值:int open(),返回的是点击的按钮对应的int值。

示例:

MessageBox messageBox = new MessageBox(shell, SWT.ICON_QUESTION |SWT.YES | SWT.NO);

messageBox.setMessage(”Is this question simple?”);

int rc = messageBox.open();

2、ColorDialog,选择颜色对话框

ColorDialog dlg = new ColorDialog(shell);

RGB rgb = dlg.open();

if (rgb != null) {

Color color = new Color(shell.getDisplay(), rgb);

}

3、DirectoryDialog,文件夹选择对话框

DirectoryDialog dlg = new DirectoryDialog(shell);

dlg.setFilterPath(text.getText());

dlg.setText(”SWT’s DirectoryDialog”);

dlg.setMessage(”Select a directory”);

String selectedDirectory = dlg.open();

4、FileDialog,文件选择对话框

FileDialog dlg = new FileDialog(shell, SWT.OPEN);

String fileName = dlg.open();

if (fileName != null) {

// Open the file

}

对话框标题栏:void setText(String text)

文件后缀名过滤:void setFilterExtensions (String[] extensions)

缺省路径及文件名:void setFilterPath(String string)

返回值:String[] getFileNames() / String getFileName()

5、FontDialog,字体选择对话框

FontDialog dlg = new FontDialog(shell);

FontData fontData = dlg.open();

if (fontData != null) {

Font font = new Font(shell.getDisplay(), fontData);

Color color = new Color(shell.getDisplay(), dlg.getRGB());

myLabel.setFont(font);

myLabel.setForeground(color);

}

6、PrintDialog,打印对话框

如何自定义对话框呢?扩展Dialog类即可。