Eclipse:以编程方式创建首选项页面
我正在尝试以编程方式创建首选项页面,我需要使用首选项页面而不在plugin.xml 中定义首选项页面扩展点 我非常接近解决方案,我能够在应用程序第一次加载时加载页面并保存值,
我的代码的核心是
PreferenceManager pmngr= PlatformUI.getWorkbench().getPreferenceManager();
//this come from other plugins that implements my personal IPreferences
PreferencePageRCP page =new PreferencePageRCP((IPreferences) element.createExecutableExtension("class"));
PreferenceNodeRCP node= new PreferenceNodeRCP(page.getId(), page.getTitle(),null,PreferencePageRCP.class.getName());
node.setPage(page);
pmngr.addToRoot(node);
PreferencePageRCP 是我的自定义 PreferencePage,所以此时我的 PreferencePage 正在工作!
但是当我第二次进入首选项窗口时,我在 PreferenceNode.createPage 上遇到了错误,所以现在我做了自己的 PreferenceNode 类覆盖 createPage 但现在我收到了 UI 错误
Problems occurred when invoking code from plug-in: "org.eclipse.jface".
!STACK 0
org.eclipse.swt.SWTException: Widget is disposed
at org.eclipse.swt.SWT.error(SWT.java:4083)
at org.eclipse.swt.SWT.error(SWT.java:3998)
at org.eclipse.swt.SWT.error(SWT.java:3969)
at org.eclipse.swt.widgets.Widget.error(Widget.java:468)
at org.eclipse.swt.widgets.Widget.checkWidget(Widget.java:340)
at org.eclipse.swt.widgets.Control.setVisible(Control.java:3370)
at org.eclipse.jface.dialogs.DialogPage.setVisible(DialogPage.java:470)
at org.eclipse.jface.preference.FieldEditorPreferencePage.setVisible(FieldEditorPreferencePage.java:374)
at org.eclipse.jface.preference.PreferenceDialog.showPage(PreferenceDialog.java:1323)
at org.eclipse.ui.internal.dialogs.FilteredPreferenceDialog.showPage(FilteredPreferenceDialog.java:673)
at org.eclipse.jface.preference.PreferenceDialog$10.run(PreferenceDialog.java:708)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
andContributionItem.java:796
.................
所以第二次 UI 中缺少了一些东西 我现在无法修复我的代码,有人成功以编程方式创建首选项页面???
I'm trying to create a preference page programmatically, I need to work with preference pages without define preferencePage extension point in plugin.xml
I'm very close to solution, I'm able to load page and save the value the first time application loads,
the core of my code is
PreferenceManager pmngr= PlatformUI.getWorkbench().getPreferenceManager();
//this come from other plugins that implements my personal IPreferences
PreferencePageRCP page =new PreferencePageRCP((IPreferences) element.createExecutableExtension("class"));
PreferenceNodeRCP node= new PreferenceNodeRCP(page.getId(), page.getTitle(),null,PreferencePageRCP.class.getName());
node.setPage(page);
pmngr.addToRoot(node);
where PreferencePageRCP is my Custom PreferencePage so a this point I have my PreferencePage working!!!
but when I go a second time to preference window I got an error on PreferenceNode.createPage, so now I did my own PreferenceNode class overriding createPage but now I got an UI error
Problems occurred when invoking code from plug-in: "org.eclipse.jface".
!STACK 0
org.eclipse.swt.SWTException: Widget is disposed
at org.eclipse.swt.SWT.error(SWT.java:4083)
at org.eclipse.swt.SWT.error(SWT.java:3998)
at org.eclipse.swt.SWT.error(SWT.java:3969)
at org.eclipse.swt.widgets.Widget.error(Widget.java:468)
at org.eclipse.swt.widgets.Widget.checkWidget(Widget.java:340)
at org.eclipse.swt.widgets.Control.setVisible(Control.java:3370)
at org.eclipse.jface.dialogs.DialogPage.setVisible(DialogPage.java:470)
at org.eclipse.jface.preference.FieldEditorPreferencePage.setVisible(FieldEditorPreferencePage.java:374)
at org.eclipse.jface.preference.PreferenceDialog.showPage(PreferenceDialog.java:1323)
at org.eclipse.ui.internal.dialogs.FilteredPreferenceDialog.showPage(FilteredPreferenceDialog.java:673)
at org.eclipse.jface.preference.PreferenceDialog$10.run(PreferenceDialog.java:708)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
andContributionItem.java:796
.................
So the second time there is something missing in UI
I at this point I'm not able to fix my code, there is someone who had success in create Preference Page Programmatically???
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下面是 java 代码,它允许以编程方式创建首选项页面:
Here is the java code, which allows the creation of a preference Page programmatically:
最后我发现我根本无法使用默认首选项页面查看器通过代码来执行此操作!
所以我实现了一个处理程序,每次调用时加载 PreferenceDialog 并每次创建节点和页面。这是我找到的唯一方法并且有效。
Finally I discovered That simply I can't do this by code using default preference page viewer!
So I realized an handler that load a PreferenceDialog everytime is called and every time create nodes and pages. that the only way I find and it works.
Skip给出的答案几乎是正确的。
引发异常是因为,
一旦对话框关闭,页面就会从 IPreferenceNode 中删除,但该节点仍然保留在 PreferenceManager 中,因此会引发找不到页面的异常。
在将节点添加到 PreferenceManager 之前,我们必须手动删除节点。
pm.removeAll()
这将完美地工作。
Answer given by Skip is almost right.
The exception is raised because,
once the dialog is closed, page is removed from IPreferenceNode, but the node still remains in the PreferenceManager, thus it raises exception for not finding the page.
We must manually remove the nodes before adding the nodes to PreferenceManager.
pm.removeAll()
This will work perfectly.