将帮助按钮添加到SWT GUI

Question

我的Eclipse应用程序中有一个简单的swt GUI,如下所示:

它的实现非常简单:

// creating the label
Label label = new Label(composite, SWT.NONE);
label.setText("Label");
// creating the input field
Text text = new Text(composite, SWT.BORDER);
gridData.horizontalAlignment = SWT.FILL;
gridData.grabExcessHorizontalSpace = true;
text.setLayoutData(gridData);

我想在标签和输入元素之间添加一个按钮,以便用户可以获得有关在字段内添加内容的其他帮助.

它可以是帮助按钮,也可以只是一个显示鼠标悬停信息的图标.

我该如何实现？我将不胜感激任何帮助!

Answer 1

执行此操作的众多方法之一是使用信息字段修饰.

就像是:

Text text = new Text(composite, SWT.BORDER);

FieldDecorationRegistry decRegistry = FieldDecorationRegistry.getDefault();

FieldDecoration infoField = decRegistry.getFieldDecoration(FieldDecorationRegistry.DEC_INFORMATION);

ControlDecoration decoration = new ControlDecoration(text, SWT.TOP | SWT.LEFT);
decoration.setImage(infoField.getImage());

decoration.setDescriptionText("Info decoration text");

GridData gridData = new GridData(SWT.FILL, SWT.CENTER, true, false);

// Space for decoration image
gridData.horizontalIndent = decRegistry.getMaximumDecorationWidth();

text.setLayoutData(gridData);