I'm writing an Eclipse plugin, I want to create a wizard for my new project type. I created pages by classes extends org.eclipse.jface.wizard.WizardPage. My requirement is, based on some condition in one page, I need to go back to previous page without pressing back button on page(programmatically).
Is it possible?
Thanks a million in advance!
I don't think this is a good idea. The user will be confused by doing this. I would disable the finish and the next button and give an error, telling the user that he has to go back to the first page.
If you want to reuse some UI from the first page, define the UI as a new class and reuse it.
I implemented something similar using the WizardDialog:showPage() method:
MyWizard.java
public void createPageControls(Composite pageContainer) {
// TODO Auto-generated method stub
super.createPageControls(pageContainer);
wizardDialog = (WizardDialog) getContainer();
}
public void skipProcessPage() {
wizardDialog.showPage(workPage == arisDbPage ? focusPage : arisDbPage);
}
public void setWorkPage(IWizardPage workPage) {
this.workPage = workPage;
}
here the processPage does the lengthy db lookup!
HTH thomas
Related
I'm trying to use captcha as it's shown in this example:
http://www.oracle.com/technetwork/developer-tools/jdev/captcha-099103.html
And it works fine in .jspx page or in .jsff page fragment, but I have to place captcha onto the first page of taskflow, and there... it's not updated! /* I mean the button "can't read image" doesn't work */ I have no idea why. Can anybody help?
Actually, I figured out how to do it by myself:
we need captcha image binding in our bean and the resetting method:
private RichImage captchaImage;
public void setCaptchaImage(RichImage captchaImage) {
this.captchaImage = captchaImage;
}
public RichImage getCaptchaImage() {
return captchaImage;
}
public void resetCaptcha(ActionEvent actionEvent) {
captchaImage.setSource("/captchaservlet?rand=" +
String.valueOf(Math.random()));
AdfFacesContext.getCurrentInstance().addPartialTarget(captchaImage.getParent());
}
All, I didn't know how to do was adding parameter to "/captchaservlet"
And now it works fine :)
But the next problem appears: when returning to this page with captcha from the second one in task flow I need to refresh captcha image. Is there any method that is executed on page return or something?
Aaaaaaaaaaaand I found even more elegant solution: one should just set the source of the captcha image to this method using the expression builder:
public String getCaptchaSource() {
return "/captchaservlet?rand=" + String.valueOf(Math.random());
}
The button "Refresh", of course, should be set as a partial trigger for the image, as in the example.
And that's it :)
I've written an Xtext-based plugin for some language. I'm now interested in creating a new independent view (as a separate plugin, though it requires my first plugin), which will interact with the currently-active DSL document - and specifically, interact with the model Xtext parsed (I think it's called the Ecore model?). How do I approach this?
I saw I can get an instance of XtextEditor if I do something like this when initializing my view:
getSite().getPage().addPartListener(new MyListener());
And then, in MyListener, override partActivated and partInputChanged to get an IWorkbenchPartReference, which is a reference to the XtextEditor. But what do I do from here? Is this even the right approach to this problem? Should I instead use some notification functionality from the Xtext side?
Found it out! First, you need an actual document:
IXtextDocument doc = editor.getDocument();
Then, if you want to access the model:
doc.modify(new IUnitOfWork.Void<XtextResource>() { // Can also use just IUnitOfWork
#Override public void process(XtextResource state) throws Exception {
...
}
});
And if you want to get live updates whenever it changes:
doc.addModelListener(new IXtextModelListener() {
#Override public void modelChanged(XtextResource resource) {
for (EObject model : resource.getContent()) {
...
}
}
});
I am trying to control when a new view is created and when an existing view is shown.
This is a very similar scenario as outlined in the "Navigating to Existing Views" section in the Prism documentation, but I can't get it to work fully:
http://msdn.microsoft.com/en-us/library/gg430861(v=pandp.40).aspx
I am finding I can create the view/view model to begin with ok, but I am then unable to create a new instance of it. I.e. I want more than one instance to exist at once.
Here's an example of the view model:
[Export]
[PartCreationPolicy(CreationPolicy.NonShared)]
public class DataEntryPageViewModel : INavigationAware, IRegionMemberLifetime
{
private Guid id;
[ImportingConstructor]
public DataEntryPageViewModel()
{
id = Guid.NewGuid();
}
public bool IsNavigationTarget(NavigationContext navigationContext)
{
// In actual fact there would be more logic here to determine
// whether this should be shown to the user
return false;
}
public void OnNavigatedFrom(NavigationContext navigationContext)
{
}
public void OnNavigatedTo(NavigationContext navigationContext)
{
}
public bool KeepAlive
{
// For the purposes of this example we don't want the view or the viewModel
// to be disposed of.
get { return true; }
}
}
I am navigating to this as follows:
m_RegionManager.RequestNavigate(
"MainRegion",
new Uri("/DataEntryPageView", UriKind.Relative));
So the first time I call the above the view is shown.
The next time I call RequestNavigate the IsNavigationTarget is hit and it returns false. What I then want it to do is to create a new instance but that doesn't happen. I know it's not happening because the constructor does not get hit and the UI does not update to show the new instance of the view.
Any ideas how I can make it create a new instance?
Many thanks,
Paul
Edit
I have noticed that the second time I call RequestNavigate (to request another instance of the same view) the callback reports an error "View already exists in region." It therefore seems that I can have multiple instances of different views in a region, but not multiple instances of the same view. My understand of this isn't great though so I could be wrong.
Why are you not creating the view when you want a new one to be created? It looks to me like you are using MEF.
Use the container to resolve a new instance of your view
Add the new instance of the view to the MainRegion
Then call Navigate and handle the appropriate logic in IsNavigationTarget
You should use the [Export] attribute in your view with a contract name: [Export("DataEntryPageView")].
I have now been able to get this to work, it was because I didn't have
[PartCreationPolicy(CreationPolicy.NonShared)]
on the class declaration of the view. I had it on the ViewModel.
So this is now resulting in the behaviour I expected.
Thanks though to Zabavsky and Alan for your suggestions.
I have a simple RCP application. I have a perspective and three views added to it. Initially one of the view will be disabled for the users. There is a toolbar item which launches a dialog. User authenticates himself in the dialog. After successful authentication, I want to make the view editable. I could get the reference of that specific view in my dialog.But I dont know how to enable it. I could not use selection listener as I am not selecting anything. Also I saw an example about using activities extension. But that opens/closes the view and not just enable/disable it. Can someone help me? Thanks.
As I understand you, you want to show the view in one of two states: either disabled if the user is not authenticated, or enabled when the user has been authenticated.
This is actually pretty easy :-) and I have made a small example application for you that illustrates the technique: so-edi.zip
UPDATED with new link
In RCP 3.x you have to expose the View's Control's enabled state in your implementation of ViewPart:
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.ui.part.ViewPart;
public class View extends ViewPart {
private Control control;
#Override
public void createPartControl(Composite parent) {
control = new Composite(parent, SWT.NONE);
}
#Override
public void setFocus() {
}
public void setEnabled(boolean enabled) {
control.setEnabled(enabled);
}
public boolean isEnabled() {
return control.getEnabled()
}
}
So let me put it this way.
I have a LogInViewModel and a LogInView. There is a Login() method in the ViewModel that gets called if the user clicks on a button in the View. Now I want the dashboard to show if the login was successful. How do I do this? I can't find a clear answer to this in the documentation.
I assume that your dashboard is essentially your shell. In which case, you can bootstrap your LoginViewModel and in the Login method, after a successful login, you can show the DashboardViewModel and close the LoginViewModel using the Caliburn.Micro WindowManager.
Something like (using MEF):
Bootstrapper.cs
public class Bootstrapper : Caliburn.Micro.Bootstrapper<ILoginViewModel>
{
...
}
LoginViewModel.cs
public class LoginViewModel : Screen, ILoginViewModel
{
private readonly IWindowManager windowManager;
private readonly IDashboardViewModel dashboardViewModel;
[ImportingConstructor]
public LoginViewModel(IWindowManager windowManager, IDashboardViewModel dashboardViewModel)
{
this.windowManager = windowManager;
this.dashboardViewModel = dashboardViewModel;
}
public void Login()
{
// if login success...
this.windowManager.ShowDialog(this.dashboardViewModel);
this.TryClose();
}
}
I've just added a very simple login example SL4 project in my "lab repository" for Caliburn.Micro.
https://github.com/jenspettersson/Caliburn.Micro.Labs/tree/master/src/Login
It uses the Show class that Rob Eisenberg uses in his "Game Library" example to switch between views.
In the Login() method, it tells my Shell (your dashboard?) to show my LoginResultViewModel and sets the login result message.
yield return Show.Child<LoginResultViewModel>().In<IShell>().Configured(c => c.ResultMessage = "Successfully logged in!");
Check the code in my github repo.
I havent used Caliburn.Micro very much lately, so I am by no means an expert, but this way works for me.
//J
Edit: This answers how to navigate between views, if you want to show a "popup" to display if the login was successful, go with the other recomendations.