Examples of org.eclipse.ui.forms.IMessageManager

org.eclipse.ui.forms.IMessageManager
This interface provides for managing typed messages in a form. Typed messages are messages associated with a type that indicates their severity (error, warning, information). The interface is responsible for:
- Bridging the concept of typed messages and control decorations
- Adding one or more messages per control in a form
- Rolling the local messages up to the form header
- Adding one or more general messages to the form header
To use it in a form, do the following:
1. For each interactive control, add a listener to it to monitor user input
2. Every time the input changes, validate it. If there is a problem, add a message with a unique key to the manager. If there is already a message with the same key in the manager, its type and message text will be replaced (no duplicates). Note that you add can messages with different keys to the same control to track multiple problems with the user input.
3. If the problem has been cleared, remove the message using the key (attempting to remove a message that is not in the manager is safe).
4. If something happens in the form that is not related to any control, use the other addMessage method.
This interface should only be referenced. It must not be implemented or extended.
@since 3.3 @see IMessageProvider @see IManagedForm

            }
        }
    }


    private void reloadRepos() {
        final IMessageManager messages = getManagedForm().getMessageManager();
        messages.removeMessage(MESSAGE_KEY, viewer.getControl());
        allRepos.clear();


        try {
            allRepos.addAll(Central.getWorkspace().getPlugins(Repository.class));
        } catch (Exception e) {
            messages.addMessage(MESSAGE_KEY, "Repository List: Unable to load OSGi Repositories. " + e.getMessage(), e, IMessageProvider.ERROR, viewer.getControl());


            // Load the repos and clear the error message if the Workspace is initialised later.
            Central.onWorkspaceInit(new Function<Workspace,Void>() {
                @Override
                public Void run(final Workspace ws) {
                    SWTConcurrencyUtil.execForControl(viewer.getControl(), true, new Runnable() {
                        @Override
                        public void run() {
                            allRepos.clear();
                            allRepos.addAll(ws.getPlugins(Repository.class));
                            messages.removeMessage(MESSAGE_KEY, viewer.getControl());
                        }
                    });
                    return null;
                }
            });

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    form.getBody().setLayout(new GridLayout(2, false));


    Composite sbody = form.getBody();


    if (node != null) {
      final IMessageManager mmng = form.getMessageManager();


      form.setText(node.getPatternName());


      IPropertyDescriptor idDescriptor = null;
      IPropertyDescriptor descriptionDescriptor = null;

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    });


    //richToolTipMessageManager = new RichMessageToolTipManager(managedForm);
    //form.getForm().setMessageToolTipManager(richToolTipMessageManager);


    final IMessageManager mmng = managedForm.getMessageManager();


    TableWrapLayout layout = new TableWrapLayout();
    form.getBody().setLayout(layout);
    Section section = toolkit.createSection(form.getBody(),
        Section.TITLE_BAR);
    section.setText("Local field messages");
    Composite sbody = toolkit.createComposite(section);
    section.setClient(sbody);
    GridLayout glayout = new GridLayout();
    glayout.horizontalSpacing = 10;
    glayout.numColumns = 2;
    sbody.setLayout(glayout);
    toolkit.paintBordersFor(sbody);
    createDecoratedTextField("Field1", toolkit, sbody, mmng);
    createDecoratedTextField("Field2", toolkit, sbody, mmng);
    createDecoratedTextField("Field3", toolkit, sbody, mmng);
    final Button button1 = toolkit.createButton(form.getBody(),
        "Add general error", SWT.CHECK);
    button1.addSelectionListener(new SelectionAdapter() {
      public void widgetSelected(SelectionEvent e) {
        if (button1.getSelection()) {
          mmng.addMessage("saveError", "Save Error", null,
              IMessageProvider.ERROR);
        } else {
          mmng.removeMessage("saveError");
        }
      }
    });
    final Button button2 = toolkit.createButton(form.getBody(),
        "Add static message", SWT.CHECK);
    button2.addSelectionListener(new SelectionAdapter() {
      public void widgetSelected(SelectionEvent e) {
        if (button2.getSelection()) {
          mmng.addMessage("info", "Secondary info", null,
              IMessageProvider.NONE);
        } else {
          mmng.removeMessage("info");
        }
      }
    });
    final Button button3 = toolkit.createButton(form.getBody(),
        "Auto update", SWT.CHECK);
    button3.addSelectionListener(new SelectionAdapter() {
      public void widgetSelected(SelectionEvent e) {
        mmng.setAutoUpdate(button3.getSelection());
      }
    });
    button3.setSelection(true);
  }

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      public void widgetSelected(SelectionEvent e) {
        boolean selection = manageMessage.getSelection();
        if (!selection)
          autoUpdate.setSelection(true);
        autoUpdate.setEnabled(selection);
        IMessageManager mm = form.getMessageManager();
        mm.setAutoUpdate(false);
        if (selection) {
          for (int i = 0; i < checkboxes.length; i++) {
            addRemoveMessage(checkboxes[i], mm);
          }
        }
        else {
          mm.removeAllMessages();
        }
        mm.setAutoUpdate(true);
        error.setEnabled(!selection);
        warning.setEnabled(!selection);
        info.setEnabled(!selection);
        cancel.setEnabled(!selection);
        if (selection) {

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  void showDependenciesError(boolean show) {
    showGeneralError(show, "_UI_Unresolved_dependencies");
  }


  void showGeneralError(boolean show, String msgKey) {
    IMessageManager msgManager = getManagedForm().getMessageManager();
    if(show) {
      String msg = UIPlugin.getLocalString(msgKey);
      msgManager.addMessage(msgKey, msg, null, IMessageProvider.ERROR);
    }
    else
      msgManager.removeMessage(msgKey);
    msgManager.update();
  }

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        }
      }
    }


    int validateModuleName(String name, String key, Control control) {
      IMessageManager msgManager = getManagedForm().getMessageManager();
      if(name == null) {
        String msg = UIPlugin.getLocalString("_UI_Module_name_missing");
        if(control == null)
          msgManager.addMessage(key, msg, null, IMessageProvider.ERROR);
        else
          msgManager.addMessage(DEFAULT_MESSAGE_KEY, msg, null, IMessageProvider.ERROR, control);
        return IMessageProvider.ERROR;
      }


      int syntaxSeverity = IMessageProvider.NONE;
      String syntax = null;
      try {
        checkName(name, true);
      }
      catch(IllegalArgumentException e) {
        try {
          checkName(name, false);
          syntax = e.getMessage();
          syntaxSeverity = IMessageProvider.WARNING;
        }
        catch(IllegalArgumentException e2) {
          syntax = e2.getMessage();
          syntaxSeverity = IMessageProvider.ERROR;
        }
      }
      if(syntax != null)
        if(control == null)
          msgManager.addMessage(key, syntax, null, syntaxSeverity);
        else
          msgManager.addMessage(DEFAULT_MESSAGE_KEY, syntax, null, syntaxSeverity, control);
      else if(control != null)
        msgManager.removeMessage(DEFAULT_MESSAGE_KEY, control);
      return syntaxSeverity;
    }

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        msgManager.removeMessage(DEFAULT_MESSAGE_KEY, control);
      return syntaxSeverity;
    }


    int validateOwnerName(String name, String key, Control control) {
      IMessageManager msgManager = getManagedForm().getMessageManager();
      if(name == null) {
        String msg = UIPlugin.getLocalString("_UI_Module_owner_missing");
        if(control == null)
          msgManager.addMessage(key, msg, null, IMessageProvider.ERROR);
        else
          msgManager.addMessage(DEFAULT_MESSAGE_KEY, msg, null, IMessageProvider.ERROR, control);
        return IMessageProvider.ERROR;
      }


      int syntaxSeverity = IMessageProvider.NONE;
      String syntax = null;
      try {
        checkOwner(name, true);
      }
      catch(IllegalArgumentException e) {
        try {
          checkOwner(name, false);
          syntax = e.getMessage();
          syntaxSeverity = IMessageProvider.WARNING;
        }
        catch(IllegalArgumentException e2) {
          syntax = e2.getMessage();
          syntaxSeverity = IMessageProvider.ERROR;
        }
      }
      if(syntax != null)
        if(control == null)
          msgManager.addMessage(key, syntax, null, syntaxSeverity);
        else
          msgManager.addMessage(DEFAULT_MESSAGE_KEY, syntax, null, syntaxSeverity, control);
      else if(control != null)
        msgManager.removeMessage(DEFAULT_MESSAGE_KEY, control);
      return syntaxSeverity;
    }

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        msgManager.removeMessage(DEFAULT_MESSAGE_KEY, control);
      return syntaxSeverity;
    }


    int validateVersion(String version, Control control) {
      IMessageManager msgManager = getManagedForm().getMessageManager();
      if(version == null) {
        String msg = UIPlugin.getLocalString("_UI_Module_version_missing");
        msgManager.addMessage(DEFAULT_MESSAGE_KEY, msg, null, IMessageProvider.ERROR, control);
        return IMessageProvider.ERROR;
      }
      int result = IMessageProvider.NONE;
      try {
        Version.fromString(version);
        msgManager.removeMessage(DEFAULT_MESSAGE_KEY, control);
      }
      catch(IllegalArgumentException e) {
        msgManager.addMessage(DEFAULT_MESSAGE_KEY, e.getMessage(), null, IMessageProvider.ERROR, control);
        result = IMessageProvider.ERROR;
      }
      return result;
    }

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      }
      return result;
    }


    int validateVersionRequirement(String versionRequirement, String key) {
      IMessageManager msgManager = getManagedForm().getMessageManager();
      if(versionRequirement == null) {
        String msg = UIPlugin.getLocalString("_UI_Module_version_requirement_missing");
        msgManager.addMessage(key, msg, null, IMessageProvider.ERROR);
        return IMessageProvider.ERROR;
      }
      int result = IMessageProvider.NONE;
      try {
        VersionRange.create(versionRequirement);
      }
      catch(IllegalArgumentException e) {
        msgManager.addMessage(key, e.getMessage(), null, IMessageProvider.ERROR);
        result = IMessageProvider.ERROR;
      }
      return result;
    }

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          int row = getRowNumber(element);
          int severity = validateDependencyName(fullName, "n" + row); //$NON-NLS-1$


          MetadataModel.Dependency dep = (MetadataModel.Dependency) element;
          if(!dep.isResolved()) {
            IMessageManager msgManager = getManagedForm().getMessageManager();
            msgManager.addMessage(
              "d" + row, MetadataModel.getUnresolvedMessage(dep), null, IMessageProvider.ERROR);
            severity = IMessage.ERROR;
          }


          if(severity == IMessage.ERROR)

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