Examples of org.eclipse.jface.bindings.Binding

org.eclipse.jface.bindings.Binding
A binding is a link between user input and the triggering of a particular command. The most common example of a binding is a keyboard shortcut, but there are also mouse and gesture bindings.

Bindings are linked to particular conditions within the application. Some of these conditions change infrequently (e.g., locale, scheme), while some will tend to change quite frequently (e.g., context). This allows the bindings to be tailored to particular situations. For example, a set of bindings may be appropriate only inside a text editor. Or, perhaps, a set of bindings might be appropriate only for a given locale, such as bindings that coexist with the Input Method Editor (IME) on Chinese locales.

It is also possible to remove a particular binding. This is typically done as part of user configuration (e.g., user changing keyboard shortcuts). However, it can also be helpful when trying to change a binding on a particular locale or platform. An "unbinding" is really just a binding with no command identifier. For it to unbind a particular binding, it must match that binding in its context identifier and scheme identifier. Subclasses (e.g., KeyBinding) may require other properties to match (e.g., keySequence). If these properties match, then this is an unbinding. Note: the locale and platform can be different.

For example, imagine you have a key binding that looks like this:
KeyBinding(command, scheme, context, "Ctrl+Shift+F")
On GTK+, the "Ctrl+Shift+F" interferes with some native behaviour. To change the binding, we first unbind the "Ctrl+Shift+F" key sequence by assigning it a null command on the gtk platform. We then create a new binding that maps the command to the "Esc Ctrl+F" key sequence.
KeyBinding("Ctrl+Shift+F",null,scheme,context,null,gtk,null,SYSTEM) KeyBinding("Esc Ctrl+F",parameterizedCommand,scheme,context,null,gtk,SYSTEM)
Bindings are intended to be immutable objects.
@since 3.1

      if (isPartialMatch(sequenceAfterKeyStroke)) {
        incrementState(sequenceAfterKeyStroke);
        return true;


      } else if (isPerfectMatch(sequenceAfterKeyStroke)) {
        final Binding binding = getPerfectMatch(sequenceAfterKeyStroke);
        try {
          return executeCommand(binding, event)
              || !sequenceBeforeKeyStroke.isEmpty();
        } catch (final CommandException e) {
          logException(e, binding.getParameterizedCommand());
          return true;
        }


      } else if ((keyAssistDialog != null)
          && (keyAssistDialog.getShell() != null)

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      } else {
        widthToRemember = NO_REMEMBERED_WIDTH;
      }


      // Remember the selected command name and key sequence.
      final Binding bindingToRemember;
      if ((completionsTable != null) && (!completionsTable.isDisposed())) {
        final int selectedIndex = completionsTable.getSelectionIndex();
        if (selectedIndex != -1) {
          final TableItem selectedItem = completionsTable
              .getItem(selectedIndex);

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        SWT.LEFT, 1);
    final Iterator itemsItr = partialMatches.entrySet().iterator();
    while (itemsItr.hasNext()) {
      final Map.Entry entry = (Map.Entry) itemsItr.next();
      final TriggerSequence sequence = (TriggerSequence) entry.getValue();
      final Binding binding = (Binding) entry.getKey();
      final ParameterizedCommand command = binding
          .getParameterizedCommand();
      try {
        final String[] text = { command.getName(), sequence.format() };
        final TableItem item = new TableItem(completionsTable, SWT.NULL);
        item.setText(text);

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   */
  private final void executeKeyBinding(final Event trigger) {
    // Try to execute the corresponding command.
    final int selectionIndex = completionsTable.getSelectionIndex();
    if (selectionIndex >= 0) {
      final Binding binding = (Binding) bindings.get(selectionIndex);
      try {
        workbenchKeyboard.executeCommand(binding, trigger);
      } catch (final CommandException e) {
        workbenchKeyboard.logException(e, binding
            .getParameterizedCommand());
      }
    }
  }

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        .getPartialMatches(keyBindingState.getCurrentSequence());


    // Create a sorted map that sorts based on lexicographical order.
    final SortedMap sortedMatches = new TreeMap(new Comparator() {
      public final int compare(final Object a, final Object b) {
        final Binding bindingA = (Binding) a;
        final Binding bindingB = (Binding) b;
        final ParameterizedCommand commandA = bindingA
            .getParameterizedCommand();
        final ParameterizedCommand commandB = bindingB
            .getParameterizedCommand();
        try {
          return commandA.getName().compareTo(commandB.getName());
        } catch (final NotDefinedException e) {
          // should not happen
          return 0;
        }
      }
    });


    /*
     * Remove those partial matches for which either the command is not
     * identified or the activity manager believes the command is not
     * enabled.
     */
    final Iterator partialMatchItr = partialMatches.entrySet().iterator();
    while (partialMatchItr.hasNext()) {
      final Map.Entry entry = (Map.Entry) partialMatchItr.next();
      final Binding binding = (Binding) entry.getValue();
      final Command command = binding.getParameterizedCommand()
          .getCommand();
      if (command.isDefined()
          && activityManager.getIdentifier(command.getId())
              .isEnabled()) {
        sortedMatches.put(binding, entry.getKey());

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   * @since 3.3
   */
  public final int open(Collection bindings) {
    conflictMatches = new TreeMap(new Comparator() {
      public final int compare(final Object a, final Object b) {
        final Binding bindingA = (Binding) a;
        final Binding bindingB = (Binding) b;
        final ParameterizedCommand commandA = bindingA
            .getParameterizedCommand();
        final ParameterizedCommand commandB = bindingB
            .getParameterizedCommand();
        try {
          return commandA.getName().compareTo(commandB.getName());
        } catch (final NotDefinedException e) {
          // should not happen
          return 0;
        }
      }
    });
    Iterator i = bindings.iterator();
    while (i.hasNext()) {
      Binding b = (Binding) i.next();
      conflictMatches.put(b, b.getTriggerSequence());
    }


    // If the dialog is already open, dispose the shell and recreate it.
    final Shell shell = getShell();
    if (shell != null) {

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  private final void clearBindings() {
    Iterator i = commandIdToBinding.entrySet().iterator();
    while (i.hasNext()) {
      Map.Entry entry = (Map.Entry) i.next();
      String commandId = (String) entry.getKey();
      Binding binding = (Binding) entry.getValue();
      commandService.getCommand(commandId).removeCommandListener(actionSetListener);
      if (binding!=null && actionSetActiveBindings.contains(binding)) {
        bindingService.removeBinding(binding);
      }
    }

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      final KeySequence keySequence = KeySequence.getInstance(keyStroke);


      final Scheme activeScheme = bindingService.getActiveScheme();


      try {
        final Binding binding = new KeyBinding(keySequence, command,
            activeScheme.getId(), IContextIds.CONTEXT_ID_WINDOW,
            null, null, null, Binding.SYSTEM);
        commandIdToBinding.put(command.getCommand().getId(), binding);


        if (command.getCommand().isEnabled()) {

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      // Fix the bindings in the local changes.
      final Binding[] currentBindings = localChangeManager.getBindings();
      final int currentBindingsLength = currentBindings.length;
      final Set trimmedBindings = new HashSet();
      for (int i = 0; i < currentBindingsLength; i++) {
        final Binding binding = currentBindings[i];
        if (binding.getType() != Binding.USER) {
          trimmedBindings.add(binding);
        }
      }
      final Binding[] trimmedBindingArray = (Binding[]) trimmedBindings
          .toArray(new Binding[trimmedBindings.size()]);

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        .getSelectionIndex();
    if ((selection >= 0)
        && (selection < tableBindingsForTriggerSequence.getItemCount())) {
      final TableItem item = tableBindingsForTriggerSequence
          .getItem(selection);
      final Binding binding = (Binding) item.getData(ITEM_DATA_KEY);
      setContextId(binding.getContextId());
    }


    update();
  }

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Related Classes of org.eclipse.jface.bindings.Binding

org.eclipse.ui.internal.commands.CommandManagerLegacyWrapper

org.eclipse.ui.internal.keys.BindingPersistence

org.eclipse.ui.internal.keys.KeyAssistDialog

org.eclipse.ui.internal.keys.KeysPreferencePage

org.eclipse.ui.internal.keys.NewKeysPreferencePage

org.eclipse.ui.internal.keys.NewKeysPreferencePage$BindingLabelProvider

org.eclipse.ui.internal.keys.WorkbenchKeyboard

org.eclipse.ui.internal.menus.LegacyActionPersistence

java.io.StringWriter

java.io.BufferedWriter

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