我正在尝试使用SWT和JFace创建基础对话框类:
public class AplotBaseDialog extends TitleAreaDialog
我对如何布局对话感到困惑?
在Swing中执行此操作我将使用createDialog
方法。然后在该方法中,我将添加作为JPanel方法的组件。然后将组件添加到我的centerPanel。哪个是基础对话框。每个Panel方法都有自己的布局。
这是一个非常简单的例子(伪代码)
public void createDialog() {
Component selectionsPanel = createTableArea();
Component buttonPanel = OKCancelButtons();
JPanel centerPanel = new JPanel();
centerPanel.setLayout(new BoxLayout(centerPanel, BoxLayout.PAGE_AXIS));
centerPanel.add(selectionsPanel);
centerPanel.add(buttonPanel);
getContentPane().add(centerPanel);
this.pack();
centerPanel.setVisible(true);
}
private JPanel OKCancelButtons() {
submitButton = new JButton("Send");
etc... etc..
JPanel p = new JPanel();
p.setLayout(new BoxLayout(p, BoxLayout.LINE_AXIS));
p.add(submitButton);
return p;
}
private JPanel createTableArea() {
JPanel p = new JPanel();
similar to above but a Table;
return p;
}
您可以看到我在方法中创建面板的方式,而不是将它们作为组件添加到基本面板。
你会怎样使用TitleAreaDialog
?
答案 0 :(得分:3)
我还没有使用TitleAreaDialog
,但这是一个简单的Dialog
我自己使用。它应该让您了解对话框的内部工作原理。它基本上只是一个带有一些错误信息和一个复选框的对话框:
public class CheckboxDialog extends Dialog {
private String message = "";
private String checkboxMessage = "";
private boolean checkValue;
private Button checkButton;
/* Constructor, set shell style and set block on open (rest of gui is blocked until closed) */
public CheckboxDialog(Shell parentShell) {
super(parentShell);
setShellStyle(SWT.CLOSE | SWT.TITLE | SWT.BORDER | SWT.OK | SWT.APPLICATION_MODAL);
setBlockOnOpen(true);
}
/* creates the content of the dialog */
protected Control createDialogArea(Composite parent) {
Composite composite = (Composite) super.createDialogArea(parent);
/* set the layout for the content (gridlayout with 1 column)*/
GridLayout layout = new GridLayout(1, false);
layout.marginHeight = 15;
layout.marginWidth = 30;
composite.setLayout(layout);
/* add a label with some text */
final Label content = new Label(composite, SWT.NONE);
content.setLayoutData(new GridData(SWT.FILL, SWT.TOP, true, false));
content.setText(message);
/* add a checkbox button */
checkButton = new Button(composite, SWT.CHECK);
checkButton.setText(checkboxMessage);
checkButton.setSelection(true);
checkButton.setLayoutData(new GridData(SWT.FILL, SWT.TOP, true, false));
return composite;
}
/* create the dialog buttons (in this case, only an OK button) */
protected void createButtonsForButtonBar(Composite parent)
{
createButton(parent, IDialogConstants.OK_ID, "OK", true);
}
/* configure the dialog's shell (set title) */
protected void configureShell(Shell newShell) {
super.configureShell(newShell);
newShell.setText("Error");
}
/* this method is executed if the OK button is pressed */
public void okPressed()
{
checkValue = checkButton.getSelection();
close();
}
/* getter and setter methods */
public void setMessage(String message) {
this.message = message;
}
public void setCheckboxMessage(String checkboxMessage) {
this.checkboxMessage = checkboxMessage;
}
public boolean getCheckBoxValue()
{
return checkValue;
}
}
如您所见,SWT中没有add
方法。您只需在每个小部件的构造函数中指定父级。
此外,here是Vogella的一个非常好的教程,它详细解释了如何创建JFace对话框。 Here是另一个关于如何使用TitleAreaDialog
。