Examples of IWidgetTokenOwner

org.eclipse.jface.text.IWidgetTokenOwner
In order to display information in a temporary window, a widget token must be acquired. The intent behind this concept is that only one temporary window should be presented at any moment in time and also to avoid overlapping temporary windows. This concept is used by the {@link org.eclipse.jface.text.ITextViewer}.
In order to provide backward compatibility for clients of IWidgetTokenOwner, extension interfaces are used as a means of evolution. The following extension interfaces exist:
- {@link org.eclipse.jface.text.IWidgetTokenOwnerExtension} since version3.0 introducing priorities when requesting a widget token and thus replacing the non-prioritized scheme.
@see org.eclipse.jface.text.IWidgetTokenOwnerExtension @since 2.0

Examples of org.eclipse.jface.text.IWidgetTokenOwner

        try {
            try {
                super.hideInformationControl();
            } finally {
                if (fControl instanceof IWidgetTokenOwner) {
                    IWidgetTokenOwner owner = (IWidgetTokenOwner) fControl;
                    owner.releaseWidgetToken(this);
                }
            }
            this.disposeInformationControl();


            //Restore previous active shell?

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Examples of org.eclipse.jface.text.IWidgetTokenOwner

    protected void handleInformationControlDisposed() {
        try {
            super.handleInformationControlDisposed();
        } finally {
            if (fControl instanceof IWidgetTokenOwner) {
                IWidgetTokenOwner owner = (IWidgetTokenOwner) fControl;
                owner.releaseWidgetToken(this);
            }
        }
    }

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Examples of org.eclipse.jface.text.IWidgetTokenOwner

  private boolean acquireWidgetToken(int type) {
    switch (type) {
      case CONTEXT_SELECTOR:
      case PROPOSAL_SELECTOR:
        if (fViewer instanceof IWidgetTokenOwner) {
          IWidgetTokenOwner owner= (IWidgetTokenOwner) fViewer;
          return owner.requestWidgetToken(this);
        } else if (fViewer instanceof IWidgetTokenOwnerExtension)  {
          IWidgetTokenOwnerExtension extension= (IWidgetTokenOwnerExtension) fViewer;
          return extension.requestWidgetToken(this, WIDGET_PRIORITY);
        }
    }

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Examples of org.eclipse.jface.text.IWidgetTokenOwner

   * @since 2.0
   */
  private void releaseWidgetToken(int type) {
    if (fListeners[CONTEXT_SELECTOR] == null && fListeners[PROPOSAL_SELECTOR] == null) {
      if (fViewer instanceof IWidgetTokenOwner) {
        IWidgetTokenOwner owner= (IWidgetTokenOwner) fViewer;
        owner.releaseWidgetToken(this);
      }
    }
  }

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Examples of org.eclipse.jface.text.IWidgetTokenOwner

    if (fTextViewer instanceof IWidgetTokenOwnerExtension && fTextViewer instanceof IWidgetTokenOwner) {
      IWidgetTokenOwnerExtension extension= (IWidgetTokenOwnerExtension) fTextViewer;
      if (extension.requestWidgetToken(this, WIDGET_PRIORITY))
        super.showInformationControl(subjectArea);
    } else if (fTextViewer instanceof IWidgetTokenOwner) {
      IWidgetTokenOwner owner= (IWidgetTokenOwner) fTextViewer;
      if (owner.requestWidgetToken(this))
        super.showInformationControl(subjectArea);


    } else
      super.showInformationControl(subjectArea);
  }

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Examples of org.eclipse.jface.text.IWidgetTokenOwner

  protected void hideInformationControl() {
    try {
      super.hideInformationControl();
    } finally {
      if (fTextViewer instanceof IWidgetTokenOwner) {
        IWidgetTokenOwner owner= (IWidgetTokenOwner) fTextViewer;
        owner.releaseWidgetToken(this);
      }
    }
  }

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Examples of org.eclipse.jface.text.IWidgetTokenOwner

  protected void handleInformationControlDisposed() {
    try {
      super.handleInformationControlDisposed();
    } finally {
      if (fTextViewer instanceof IWidgetTokenOwner) {
        IWidgetTokenOwner owner= (IWidgetTokenOwner) fTextViewer;
        owner.releaseWidgetToken(this);
      }
    }
  }

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Examples of org.eclipse.jface.text.IWidgetTokenOwner

      case PROPOSAL_SELECTOR:
        if (fContentAssistSubjectControl instanceof IWidgetTokenOwnerExtension) {
          IWidgetTokenOwnerExtension extension= (IWidgetTokenOwnerExtension) fContentAssistSubjectControl;
          return extension.requestWidgetToken(this, WIDGET_PRIORITY);
        } else if (fContentAssistSubjectControl instanceof IWidgetTokenOwner) {
          IWidgetTokenOwner owner= (IWidgetTokenOwner) fContentAssistSubjectControl;
          return owner.requestWidgetToken(this);
        } else if (fViewer instanceof IWidgetTokenOwnerExtension) {
          IWidgetTokenOwnerExtension extension= (IWidgetTokenOwnerExtension) fViewer;
          return extension.requestWidgetToken(this, WIDGET_PRIORITY);
        } else if (fViewer instanceof IWidgetTokenOwner) {
          IWidgetTokenOwner owner= (IWidgetTokenOwner) fViewer;
          return owner.requestWidgetToken(this);
        }
    }
    return true;
  }

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Examples of org.eclipse.jface.text.IWidgetTokenOwner

   * @param type the listener type
   * @since 2.0
   */
  private void releaseWidgetToken(int type) {
    if (fListeners[CONTEXT_SELECTOR] == null && fListeners[PROPOSAL_SELECTOR] == null) {
      IWidgetTokenOwner owner= null;
      if (fContentAssistSubjectControl instanceof IWidgetTokenOwner)
        owner= (IWidgetTokenOwner) fContentAssistSubjectControl;
      else if (fViewer instanceof IWidgetTokenOwner)
        owner= (IWidgetTokenOwner) fViewer;
      if (owner != null)
        owner.releaseWidgetToken(this);
    }
  }

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