Eclipse popupMene高级教程:使用Visibility定制弹出菜单

最新推荐文章于 2024-03-22 09:59:05 发布

kevin99zhang

最新推荐文章于 2024-03-22 09:59:05 发布

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文章转载自： http://solonote.javaeye.com/blog/150906 作者：solonote

这几天一直在研究popupMenu的Action,想要达到的目是选中不同的东西弹出不同的菜单。网上有很多介绍的文章，不过很多文章都是一些翻译过来并且作者没有自己实践过的东西,浪费了我很多时间，最后自己通过摸索，终于找出了这个问题的解决办法。

1.文章类型:
这是一篇解决问题的教程，不讨论技术的背景知识，比如运用到何种设计模式，以及实现背后的原理等问题。

2.此文对您的帮助:
看完此文后您将能够创建一个由选择内容指定弹出项的动态菜单。

setp1.创建一个rcp工程，模板使用有一个view的
step2.创建popupMenu
step2_1.新建类Action1:

Java代码

1 . package solonote.example.popupmenu;

2 .

3 . import org.eclipse.jface.action.IAction;

4 . import org.eclipse.jface.viewers.ISelection;

5 . import org.eclipse.ui.IObjectActionDelegate;

6 . import org.eclipse.ui.IWorkbenchPart;

7 .

8 . public class Action1 implements IObjectActionDelegate {

10. @Override

11. public void setActivePart(IAction action, IWorkbenchPart targetPart) {

12. // TODO Auto-generated method stub

13.

14. }

15.

16. @Override

17. public void run(IAction action) {

18. // TODO Auto-generated method stub

19.

20. }

21.

22. @Override

23. public void selectionChanged(IAction action, ISelection selection) {

24. // TODO Auto-generated method stub

25.

26. }

27.

28. }

step2_2.添加扩展点:

1. <? xml version="1.0" encoding="UTF-8" ?>

2. <? eclipse version="3.2" ?>

3. < plugin >

5. < extension

6. id ="application"

7. point ="org.eclipse.core.runtime.applications" >

8. < application >

9. < run

10. class ="solonote.example.popupmenu.Application" >

11. </ run >

12. </ application >

13. </ extension >

14. < extension

15. point ="org.eclipse.ui.perspectives" >

16. < perspective

17. name ="Perspective"

18. class ="solonote.example.popupmenu.Perspective"

19. id ="solonote.example.popupMenu.perspective" >

20. </ perspective >

21. </ extension >

22. < extension

23. point ="org.eclipse.ui.views" >

24. < view

25. name ="View"

26. class ="solonote.example.popupmenu.View"

27. id ="solonote.example.popupMenu.view" >

28. </ view >

29. </ extension >

30.

31. < extension

32. point ="org.eclipse.ui.popupMenus" >

33. < objectContribution

34. id ="objectContribution"

35. objectClass ="java.lang.Object" >

36. < action

37. class ="solonote.example.popupmenu.Action1"

38. id ="solonote.example.popupMenu.action1"

39. label ="label" >

40. </ action >

41. </ objectContribution >

42. </ extension >

43.

44. </ plugin >

<?xml version="1.0" encoding="UTF-8"?> <?eclipse version="3.2"?> <plugin>     <extension          id="application"          point="org.eclipse.core.runtime.applications">       <application>          <run                class="solonote.example.popupmenu.Application">          </run>       </application>    </extension>    <extension          point="org.eclipse.ui.perspectives">       <perspective             name="Perspective"             class="solonote.example.popupmenu.Perspective"             id="solonote.example.popupMenu.perspective">       </perspective>    </extension>    <extension          point="org.eclipse.ui.views">       <view             name="View"             class="solonote.example.popupmenu.View"             id="solonote.example.popupMenu.view">       </view>    </extension>    <!-- 弹出菜单的定义 -->    <extension          point="org.eclipse.ui.popupMenus">       <objectContribution             id="objectContribution"             objectClass="java.lang.Object">          <action                class="solonote.example.popupmenu.Action1"                id="solonote.example.popupMenu.action1"                label="label">          </action>       </objectContribution>    </extension>  </plugin>

step2_3设置弹出菜单的弹出位置
修改View类

Java代码

1 . package solonote.example.popupmenu;

2 .

3 . import org.eclipse.jface.action.MenuManager;

4 . import org.eclipse.jface.viewers.IStructuredContentProvider;

5 . import org.eclipse.jface.viewers.ITableLabelProvider;

6 . import org.eclipse.jface.viewers.LabelProvider;

7 . import org.eclipse.jface.viewers.TableViewer;

8 . import org.eclipse.jface.viewers.Viewer;

9 . import org.eclipse.swt.SWT;

10 . import org.eclipse.swt.graphics.Image;

11 . import org.eclipse.swt.widgets.Composite;

12 . import org.eclipse.swt.widgets.Menu;

13 . import org.eclipse.ui.ISharedImages;

14 . import org.eclipse.ui.PlatformUI;

15 . import org.eclipse.ui.part.ViewPart;

16 .

17 . public class View extends ViewPart {

18. public static final String ID = "solonote.example.popupMenu.view";

19.

20. private TableViewer viewer;

21.

22. /**

23. * The content provider class is responsible for providing objects to the

24. * view. It can wrap existing objects in adapters or simply return objects

25. * as-is. These objects may be sensitive to the current input of the view,

26. * or ignore it and always show the same content (like Task List, for

27. * example).

28. */

29. class ViewContentProvider implements IStructuredContentProvider {

30. public void inputChanged(Viewer v, Object oldInput, Object newInput) {

31. }

32.

33. public void dispose() {

34. }

35.

36. public Object[] getElements(Object parent) {

37. return new SimpleDTO[] { new SimpleDTO("One"), new SimpleDTO("Two"),
new SimpleDTO("Three") };

38.

39. }

40. }

41.

42. class ViewLabelProvider extends LabelProvider implements

43. ITableLabelProvider {

44. public String getColumnText(Object obj, int index) {

45. SimpleDTO dto = (SimpleDTO) obj;

46. return dto.getName();

47. }

48.

49. public Image getColumnImage(Object obj, int index) {

50. return getImage(obj);

51. }

52.

53. public Image getImage(Object obj) {

54. return PlatformUI.getWorkbench().getSharedImages().getImage(

55. ISharedImages.IMG_OBJ_ELEMENT);

56. }

57. }

58.

59. /**

60. * This is a callback that will allow us to create the viewer and initialize

61. * it.

62. */

63. public void createPartControl(Composite parent) {

64. viewer = new TableViewer(parent, SWT.MULTI | SWT.H_SCROLL

65. | SWT.V_SCROLL);

66. viewer.setContentProvider(new ViewContentProvider());

67. viewer.setLabelProvider(new ViewLabelProvider());

68. viewer.setInput(getViewSite());

69.

70. //初始化弹出菜单

71. MenuManager popupMenuManager = new MenuManager("#PopupMenu");

72. popupMenuManager.setRemoveAllWhenShown(true);

73. Menu popupMenu = popupMenuManager.createContextMenu(viewer.getTable());

74. viewer.getTable().setMenu(popupMenu);

75. //设置选择提供者和弹出菜单

76. getSite().setSelectionProvider(viewer);

77. getSite().registerContextMenu(popupMenuManager, viewer);

78. }

79.

80. /**

81. * Passing the focus request to the viewer's control.

82. */

83. public void setFocus() {

84. viewer.getControl().setFocus();

85. }

86. }

好的step2已经结束了，现在您可以运行一下程序，看看效果.

接下来将要进行的是，只有选中Three时菜单才弹出，选择其他两个则不弹出。
确切的说是只有选择Three时
<objectContribution
id="objectContribution"
objectClass="java.lang.Object">
节点中的Action才显示.

接下来:
step3_1修改扩展点增加visibility项

Java代码

  <!-- 弹出菜单的定义 -->    <extension          point="org.eclipse.ui.popupMenus">       <objectContribution             id="objectContribution"             objectClass="java.lang.Object">          <action                class="solonote.example.popupmenu.Action1"                id="solonote.example.popupMenu.action1"                label="label">          </action>          <visibility>             <objectState                   name="name"                   value="Three">             </objectState>          </visibility>       </objectContribution>    </extension>

1.

2. < extension

3. point ="org.eclipse.ui.popupMenus" >

4. < objectContribution

5. id ="objectContribution"

6. objectClass ="java.lang.Object" >

7. < action

8. class ="solonote.example.popupmenu.Action1"

9. id ="solonote.example.popupMenu.action1"

10. label ="label" >

11. </ action >

12. < visibility >

13. < objectState

14. name ="name"

15. value ="Three" >

16. </ objectState >

17. </ visibility >

18. </ objectContribution >

19. </ extension >

修改被选中的DTO，让其实现IActionFilter接口

Java代码

package solonote.example.popupmenu;  import org.eclipse.ui.IActionFilter;  /**  * Viewer显示的项  * @author solonote  * @version 0.1.0 2007-12-26 上午11:49:41  */ public class SimpleDTO implements IActionFilter{ 	/** 	 * 显示的名字 	 */ 	private String name;  	/** 	 * 返回显示的名字 	 * @return 显示的名字 	 */ 	public String getName() { 		return name; 	}  	/** 	 * 设置显示的名字 	 * @param name 显示的名字 	 */ 	public void setName(String name) { 		this.name = name; 	}  	public SimpleDTO(String name) { 		super(); 		this.name = name; 	}  	/** 	 * 选择时候是否显示Action的判断 	 * <visibility>             <objectState                   name="name"                   value="Three">             </objectState>          </visibility> 	 * @param target 选择的东西 	 * @param name plugin.xml里配置的name 	 * @param value plugin.xml里配置的value 	 */ 	@Override 	public boolean testAttribute(Object target, String name, String value) { 		System.out.println(name); 		System.out.println(value); 		System.out.println(target); 		SimpleDTO dto = (SimpleDTO) target; 		if(dto.getName().equals(value)) 			return true;	 		return false; 	} 	 	 }

1 . package solonote.example.popupmenu;

2 .

3 . import org.eclipse.ui.IActionFilter;

4 .

5 . /**

6. * Viewer显示的项

7. * @author solonote

8. * @version 0.1.0 2007-12-26 上午11:49:41

9. */

10 . public class SimpleDTO implements IActionFilter {

11. /**

12. * 显示的名字

13. */

14. private String name;

15.

16. /**

17. * 返回显示的名字

18. * @return 显示的名字

19. */

20. public String getName() {

21. return name;

22. }

23.

24. /**

25. * 设置显示的名字

26. * @param name 显示的名字

27. */

28. public void setName(String name) {

29. this.name = name;

30. }

31.

32. public SimpleDTO(String name) {

33. super();

34. this.name = name;

35. }

36.

37. /**

38. * 选择时候是否显示Action的判断

39. * <visibility>

40. <objectState

41. name="name"

42. value="Three">

43. </objectState>

44. </visibility>

45. * @param target 选择的东西

46. * @param name plugin.xml里配置的name

47. * @param value plugin.xml里配置的value

48. */

49. @Override

50. public boolean testAttribute(Object target, String name, String value) {

51. System.out.println(name);

52. System.out.println(value);

53. System.out.println(target);

54. SimpleDTO dto = (SimpleDTO) target;

55. if(dto.getName().equals(value))

56. return true;

57. return false;

58. }

59.

60.

61. }

然后就完成了，当然实际运用中我运用了Adapter将DTO适配成IActionFilter接口，这样DTO就不用和IActionFilter接口耦合了，或许以后的文章会接受如何适配。这里已经解决了问题，好的如果有任何疑问请联系我 solonote@163.com
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