I wrote some custom composite widgets for a project and compiled them into a separate jar file. I added this jar file to the build path for the GWT project. When I try to add the widgets to the palette (by pressing the "Choose component" button), I can pick the composite widget's class in the list, but I get the following error:
WindowBuilder was unable to load com.test.common.ui.LocationBox. This may be caused by
ClassLoader problems. Do you want to refresh editor and try again?
What am I doing wrong here? Is there something I need to add to the jar to make it load properly?
Sometimes the GWT Designer does not pick up changed classes or is not able to find them.
I would recommend to a full rebuild using the menu "Project->Clean" and then closing and reopening the designer.
If this does not help, try a restart of eclipse before reopening the designer.
Related
In an Eclipse based application (RCP), when double clicking on a file that appears in the project explorer, for the first file this will work – the associated editor will open. However, when double clicking again on a file, it will not open. If you click somewhere out of the Project Explorer and then return to the Project Explorer, then the second double click will work.
Note that right-clicking on the resource and selecting “Open” always works. In addition, in Package Explorer it always works.
I believe this is related to eclipse bugs 285239 and 256761.
Does anyone know of a way that I can overcome this problem, as the RCP developer. The file editor is a custom editor in one of my plugins.
The problem does not seem to happen to me with java files in standard eclipse for java development.
Thanks,
Eyal.
I solved the problem by implementing a setFocus method on the editor class. In the setFocus, I set the focus to some component. (To be precise in my case the editor was a subclass of SharedHeaderFormEditor so I set the focus to the active page).
The truth is that the specification of the setFocus method in IWorkbenchPart requires you to "assign the focus to one of the controls contained in the part's parent composite". It seems that the default implementation of setFocus in some cases did not do that (I don't know why, maybe I was missing something or for other reason).
Note that also setting focus explicitly to a control from within editor initializing partialy solves the problem.
I want to change my custom perspective's icon in eclipse. I have searched a lot but I didn't find any solution.
The icon for a perspective can be changed by updating the iconURI attribute of the perspective's definition in workbench.xmi file. This file is located inside the .metadata directory of the workspace. e.g. /My-Workspace/.metadata/.plugins/org.eclipse.e4.workbench/workbench.xmi.
There are usually two lines with the iconURI attribute. For example:
<children xsi:type="advanced:Perspective" ... iconURI="platform:/plugin/com.atlassian.clover.eclipse.core/icons/cview16/clover.gif" tooltip="Clover">
and
<snippets xsi:type="advanced:Perspective" ... iconURI="platform:/plugin/com.atlassian.clover.eclipse.core/icons/cview16/clover.gif" tooltip="Clover">
The icon URI is a path to an image within an Eclipse plugin. (Plugins are located at {ECLIPSE_HOME}/plugins directory.)
The workbench.xmi file needs to be edited after closing the Eclipse IDE, because the file gets overwritten when you exit from Eclipse.
In this example I created a custom perspective named Clover by modifying the Java Perspective available in Eclipse, and saving it as "Clover". Initially my perspective had the same icon as the Java perspective:
So I closed Eclipse, changed the icon paths in workbench.xmi, saved the file, reopened the IDE, and got the new icon displayed:
Note: I use Eclipse 4.6.0 (Neon) but this solution would work for all Eclipse 4 versions.
If you stored an existing perspective under a different name as your custom perspective, then it is not possible to change the icon.
You would have to define the perspective by writing a small Eclipse plugin to be able to change the icon.
Open plugin.xml for your plugin; go to the Extensions page; and select your perspective extension (in org.eclipse.ui.perspectives: you should have your custom prspective entered in here). There is an icon attribute you can set for your custom perspective. (I am using Neon2)
I am using eclipse 3.6. I created one sample plugin application. It is neither a eclipse rcp nor workbench. Now when I run the eclipse I want that plugin also to be loaded. But I dont want to use IStartUp. Because what I have found out is
IStartup will be called after the workbench is loaded. I want to refresh some menu. So Is there any way to activate my plugin while the eclipse loaded?
I tried to use Bundle Activation policy. But that is also not activating my Activator class. I just put one System.out. println("Inside start()"). So that is not called. Now can I make it activate my activator?
EDIT:
what my exact requirement is, I have created one workbench application.It is not eclipse rcp application. Now I want to remove the following menu and menu items from the eclipse before the eclipe is loaded.
1. File Menu
2.) Search Menu
3.)Run Menu
4.)Help->search,Dynamic Help,Key assist,Tips and trick,Report Bug,Cheat Sheet.
These menus are inbuilt menu of eclipse. So that is the reason I have to do in this way.
So I already implemented by using startup extension point. But the early startup is called after the eclipse is started.So I need to do some refreshment on the workbench.Then only the menu item will get removed.So I thought I need startup extension point will not satisfy my requirement as it doesnot refresh the workbench.I need to activate the my plugin and refresh the workbench before it is loaded.
Thanks
Bhanu
You can set the needed start level for your plugin using touch point instruction.
You are just a plugin that expects to run in the Eclipse IDE?
Then the answer is, you cannot do what you want.
If you start before the workbench has finished initializing, most of the services that could be used won't work: The workbench itself, menu service, command service, etc.
For most plugins in eclipse, the plugin.xml should be used to add menus, views, editors, etc to eclipse. When necessary, the framework will instantiate them.
org.eclipse.ui.IStartup is available and as you mentioned it will be called after the workbench has been initialized, but before any windows have been shown. It's not to be used lightly, and not by plugins contributing to the UI as it allows all extension from that plugin to be loaded.
EDIT:
If you are an RCP app, you control the main menu. As an RCP app, you have access to the ActionBarAdvisor, WorkbenchAdvisor, WorkbenchWindowAdvisor, which all have lifecycle methods.
If you are an an eclipse plugin, you can add to the main menu ... you cannot easily remove from the main menu. This is by design. Start levels and org.eclipse.ui.startup are 2 mechanisms that won't do what you want.
You still need to answer these questions:
There might still be a way. The crux of your problem is: "I want to refresh some menu"
What kind of menu (popup, main menu,
compound list of menu items in a
menu, etc)?
Where is the menu contribution coming from?
Which specific menu item is it?
Please edit your question (do not comment) and include the information from the above 3 questions, please.
I've added a custom new project wizard to Eclipse which uses the preexisting Java nature. Here's the block from plugin.xml where I add it:
<wizard
class="com.corp.eclipse.wizard.project.NewExtensionWizard"
descriptionImage="/rsrc/icons/app.png"
finalPerspective="org.eclipse.jdt.ui.JavaPerspective"
icon="rsrc/icons/app.png"
id="framer.newExtensionWizard"
name="Extension Project"
project="true">
</wizard>
The "Extension Project" project type shows up just fine in the "New" dialog, but the icon is not displayed. Does anyone know if there's a trick to getting icons attached to wizards in Eclipse? This is Eclipse 3.5.2.
I had the same issue as yours and I had to breakpoint through the initialisation code to finally find out why. This may be your issue:
In AbstractUIPlugin.class, imageDescriptorFromPlugin(...)
// if the bundle is not ready then there is no image
Bundle bundle = Platform.getBundle(pluginId);
if (!BundleUtility.isReady(bundle)) {
return null;
}
The bundle may not be loading. This can happen if the id of the plugin is not a prefix of the extension point (as was my case). So, the id for your wizard is framer.newExtensionWizard. Unless your entire plugin id (Bundle-SymbolicName in MANIFEST.MF) is just framer, the method is not going to find the bundle, and thus the image will not appear.
The solution then is to make sure that whatever id you give your plugin, make sure all extension point ids use that id as a prefix.
Is rsrc is your source folder? Usually icons folder is kept under the project directly. You can move it out of the source folder and also specify it in the build.properties.
i am making an eclipse plugin which make a ui on right clicking a project in eclipse workspce . the ui contains text fields , package explorer for the current project and directory explorer for current project.
i have successfully made a ui which appears on clicking a menu item on right clicking the project but it seems i can't make any jface or swt ui since they are not visible when we are using eclipse command hadlers .so in order to overcome it i made dialog pages but they have limited dialog like directorty dialog and file dialog and that too for entire window directory..... but i want package explorer and directory explorer for the project i just chose like it happens when u try making a new class in a project the browse buttons just show packages and directory struture w.r.t to current selection
am i doin things wrong or is there a way out please suggest .....
It seems a bit unclear to me, what the 'UI' is about. If you plan to embed the package and directory views inside a dialog next to each other, then I think you have to build similar lists on your own, since they are views with their own event logic. But if you plan to use them via the browse buttons as describes, take a look at this page. It gives a good overview of the available selection dialogs in eclipse.
It is also always a good practice to search for code in eclipse that does nearly the same you want to do.
As an example, take a look at the new class wizard from the jdt.ui plug-in (This is the wizard you mentioned in your question): Press Cmd-Shift-T and begin typing 'newclass' and open NewClassWizardPage from org.eclipse.jdt.ui.wizards. This works as expected if you imported all jdt plug-ins as (binary) projects.
Take a look at the createControl method and dive into the createXXXControls methods via F3 and try to find out how JDT is doing the job.
As an alternative, open the desired selection dialog class (again with Cmd-Shift-T) and open the call hierarchy of that class...