JFACE第四天 向导对话框

內容重點:
   向導對話框
內容:
  1. 向導對話框,每個頁教要繼顧自WizardPage类构造方法,并需实现
   createControl抽象方法:
  2.构造方法有两种:
      A.
        WizardPage(String pageName);
      B.
        WizardPage(String pageName,String title,ImageDescriptor titleImage)
  3.在createControl方法中创建向导对话框的控件后,不要忘记调用setControl方法.
  否则将不能显示控件,

 

  4.当创建组装各个向导页面类时应该注意以下几个问题:
    向导必须断承自Wizard类,必须实现performFinish方法,
    该方法为单击"完成"按钮后调用的方法.
    将各个向导页面加入到向导中使用的是addPage方法.
     便一定要按顺序加入.
   
    另外可以通过覆盖父类中的canFinish方法.设置"完成"按钮的可用状态.

向导页:

package com.swtjface.wizardpage;

import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.wizard.IWizard;
import org.eclipse.jface.wizard.WizardDialog;
import org.eclipse.jface.wizard.WizardPage;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;

public class WQ1 extends WizardPage {

 protected WQ1() {
  super(bookWizard.q1, "title", ImageDescriptor.createFromFile(WQ1.class,
    "icons\\customer.gif"));

  this.setMessage("本書怎麽樣");
 }

 public void createControl(Composite parent) {
  // TODO Auto-generated method stub
  Composite composite = new Composite(parent, SWT.NONE);
  composite.setLayout(new GridLayout(2, false));
  new Label(composite, SWT.LEFT).setText("a.");
  Button b1 = new Button(composite, SWT.RADIO);
  b1.setText("太簡單");
  b1.setSelection(true);

wizardtest.putDS("wq1", "test1");
  setControl(composite);
 }
}

第二页:

package com.swtjface.wizardpage;

import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.wizard.IWizard;
import org.eclipse.jface.wizard.WizardDialog;
import org.eclipse.jface.wizard.WizardPage;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;

public class WQ2 extends WizardPage {

 protected WQ2() {
  super(bookWizard.q2, "title", ImageDescriptor.createFromFile(WQ1.class,
    "icons\\customer.gif"));

  this.setMessage("怎麽樣");
 }

 public void createControl(Composite parent) {
  // TODO Auto-generated method stub
  Composite composite = new Composite(parent, SWT.NONE);
  composite.setLayout(new GridLayout(2, false));
  new Label(composite, SWT.LEFT).setText("a.");
  Button b1 = new Button(composite, SWT.RADIO);
  b1.setText("太簡單");
  b1.setSelection(true);

wizardtest.putDS("wq2", "test2");
  setControl(composite);
 }
}

第三页:

package com.swtjface.wizardpage;

import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.wizard.IWizard;
import org.eclipse.jface.wizard.WizardDialog;
import org.eclipse.jface.wizard.WizardPage;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;

public class thanks extends WizardPage {

 protected thanks() {
  super(bookWizard.q3, "thanks", ImageDescriptor.createFromFile(
    thanks.class, "icons\\customer.gif"));

  this.setMessage("怎麽樣");
 }

 public void createControl(Composite parent) {
  // TODO Auto-generated method stub
  Composite composite = new Composite(parent, SWT.NONE);
  composite.setLayout(new GridLayout(2, false));
  new Label(composite, SWT.LEFT).setText("thanks !!!");

wizardtest.putDS("wq3", "test3");  //记录信息到XML文档
  setControl(composite);
 }
}

装配程式:

package com.swtjface.wizardpage;

import org.eclipse.jface.wizard.Wizard;

public class bookWizard extends Wizard {
 public static final String q1 = "WQ_1";
 public static final String q2 = "WQ_2";
 public static final String q3 = "thanks";
 private WQ1 wq1;
 private WQ2 wq2;
 private thanks thanks;

 public bookWizard() {
  wq1 = new WQ1();
  wq2 = new WQ2();
  thanks = new thanks();
  this.addPage(wq1);
  this.addPage(wq2);
  this.addPage(thanks);
  this.setWindowTitle("Wizard page!!");
 }

 @Override
 public boolean canFinish() {
  if (this.getContainer().getCurrentPage() == thanks) {
   return true;
  } else {
   return false;
  }
 }

 @Override
 public boolean performFinish() {
  wizardtest.saveDS(); //保存

  return false;
 }

}

主程式:

package com.swtjface.wizardpage;

import org.eclipse.jface.window.ApplicationWindow;
import org.eclipse.jface.wizard.WizardDialog;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

public class wizardtest extends ApplicationWindow {

static DialogSettings ds = new DialogSettings(null);

 public static void putDS(String key, String str) {
  ds.put(key, str);
 }

 public static void saveDS() {
  try {
   ds.save("d:\\test.xml");
  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
 }

 public wizardtest() {
  super(null);
  // TODO Auto-generated constructor stub
 }

 protected Control createContents(Composite parent) {
  parent.setLayout(new RowLayout(SWT.VERTICAL));
  Button btn = new Button(parent, SWT.NONE);
  btn.setText("打開向導");
  btn.addSelectionListener(new SelectionAdapter() {
   public void widgetSelected(SelectionEvent e) {
    WizardDialog dlg = new WizardDialog(Display.getCurrent()
      .getActiveShell(), new bookWizard());
    dlg.open();
   }

  });
  return parent;
 }

 public static void main(String[] args) {
  wizardtest test = new wizardtest();
  test.setBlockOnOpen(true);
  test.open();
  Display.getCurrent().dispose();
 }
}

    

 如何实现各式各样的提示窗口呢，SWT提供了一个类
MessageDialog
只有一个确定
MessageDialog.openInformation(shell, "title", "message");
有是/否
MessageDialog.openConfirm(shell, "title","message");
有是/否/取消
MessageDialog dialog = new MessageDialog(shell, "title", null, "message",
  MessageDialog.QUESTION, new String[] {IDialogConstants.YES_LABEL,
  IDialogConstants.NO_LABEL,IDialogConstants.CANCEL_LABEL }, 0);
dialog.open();
还可以加入更多的选择项，只需要在数组中加入更多的内容
那如何取得点击了哪个按钮呢，两种方法
直接int result = dialog.open();
或者int result = dialog.getReturnCode();
返回的result的值就是被选中按钮在数组中的index