C++ ActionList::empty方法代码示例

    ActionItem *pop()
    {
        if (actions.empty())
            return 0;

        ActionItem *ret=actions.at(0);
        actions.pop_front();
        return ret;
    }

static QStringList objectNameList(QDesignerFormWindowInterface *form)
{
    typedef QList<QAction*> ActionList;
    typedef QList<QButtonGroup *> ButtonGroupList;

    QStringList result;

    QWidget *mainContainer = form->mainContainer();
    if (!mainContainer)
        return result;

    // Add main container container pages (QStatusBar, QWizardPages) etc.
    // to the list. Pages of containers on the form are not added, however.
    if (const QDesignerContainerExtension *c = qt_extension<QDesignerContainerExtension *>(form->core()->extensionManager(), mainContainer)) {
        const int count = c->count();
        for (int i = 0 ; i < count; i++)
            addWidgetToObjectList(c->widget(i), result);
    }

    const QDesignerFormWindowCursorInterface *cursor = form->cursor();
    const int widgetCount = cursor->widgetCount();
    for (int i = 0; i < widgetCount; ++i)
        addWidgetToObjectList(cursor->widget(i), result);

    const QDesignerMetaDataBaseInterface *mdb = form->core()->metaDataBase();

    // Add managed actions and actions with managed menus
    const ActionList actions = mainContainer->findChildren<QAction*>();
    if (!actions.empty()) {
        const ActionList::const_iterator cend = actions.constEnd();
        for (ActionList::const_iterator it = actions.constBegin(); it != cend; ++it) {
            QAction *a = *it;
            if (!a->isSeparator()) {
                if (QMenu *menu = a->menu()) {
                    if (mdb->item(menu))
                        result.push_back(menu->objectName());
                } else {
                    if (mdb->item(a))
                        result.push_back(a->objectName());
                }
            }
        }
    }

    // Add  managed buttons groups
    const ButtonGroupList buttonGroups = mainContainer->findChildren<QButtonGroup *>();
    if (!buttonGroups.empty()) {
        const ButtonGroupList::const_iterator cend = buttonGroups.constEnd();
        for (ButtonGroupList::const_iterator it = buttonGroups.constBegin(); it != cend; ++it)
            if (mdb->item(*it))
                result.append((*it)->objectName());
    }

    result.sort();
    return result;
}

NodeList Builder::add_task(
		const Environment& env,
		const NodeList& targets,
		const NodeList& sources,
		const ActionList& actions
		)
{
	if(!actions.empty()) {
		Task::pointer task(new Task(env, targets, sources, actions));
		for(const Node& node : targets)
			graph[node]->set_task(task);
	} else {
		for(const Node& target : targets)
			for(const Node& source : sources)
				add_edge(target, source, graph);
	}
	return targets;
}

bool ToolBarEventFilter::handleContextMenuEvent(QContextMenuEvent * event )
{
    event->accept();

    const QPoint globalPos = event->globalPos();
    const int index = actionIndexAt(m_toolBar, m_toolBar->mapFromGlobal(globalPos), m_toolBar->orientation());
    const ActionList actions = m_toolBar->actions();
    QAction *action = index != -1 ?actions.at(index) : 0;
    QVariant itemData;
    QMenu menu(0);

    // Insert before
    if (action && index != 0 && !action->isSeparator()) {
        QAction *newSeperatorAct = menu.addAction(tr("Insert Separator before '%1'").arg(action->objectName()));
        qVariantSetValue(itemData, action);
        newSeperatorAct->setData(itemData);
        connect(newSeperatorAct, SIGNAL(triggered()), this, SLOT(slotInsertSeparator()));
    }

    // Append separator
    if (actions.empty() || !actions.back()->isSeparator()) {
        QAction *newSeperatorAct = menu.addAction(tr("Append Separator"));
        qVariantSetValue(itemData, static_cast<QAction*>(0));
        newSeperatorAct->setData(itemData);
        connect(newSeperatorAct, SIGNAL(triggered()), this, SLOT(slotInsertSeparator()));
    }
    // Remove
    if (!menu.actions().empty())
        menu.addSeparator();

    // Remove
    if (action) {
        QAction *a = menu.addAction(tr("Remove action '%1'").arg(action->objectName()));
        qVariantSetValue(itemData, action);
        a->setData(itemData);
        connect(a, SIGNAL(triggered()), this, SLOT(slotRemoveSelectedAction()));
    }

    QAction *remove_toolbar = menu.addAction(tr("Remove Toolbar '%1'").arg(m_toolBar->objectName()));
    connect(remove_toolbar, SIGNAL(triggered()), this, SLOT(slotRemoveToolBar()));

    menu.exec(globalPos);
    return true;
}

// Create a MDI subwindow for the form.
QMdiSubWindow *DockedMainWindow::createMdiSubWindow(QWidget *fw, Qt::WindowFlags f, const QKeySequence &designerCloseActionShortCut)
{
    QMdiSubWindow *rc = mdiArea()->addSubWindow(fw, f);
    // Make action shortcuts respond only if focused to avoid conflicts with
    // designer menu actions
    if (designerCloseActionShortCut == QKeySequence(QKeySequence::Close)) {
        const ActionList systemMenuActions = rc->systemMenu()->actions();
        if (!systemMenuActions.empty()) {
            const ActionList::const_iterator cend = systemMenuActions.constEnd();
            for (ActionList::const_iterator it = systemMenuActions.constBegin(); it != cend; ++it) {
                if ( (*it)->shortcut() == designerCloseActionShortCut) {
                    (*it)->setShortcutContext(Qt::WidgetShortcut);
                    break;
                }
            }
        }
    }
    return rc;
}

ActionList ToolBarEventFilter::contextMenuActions(const QPoint &globalPos)
{
    ActionList rc;
    const int index = actionIndexAt(m_toolBar, m_toolBar->mapFromGlobal(globalPos), m_toolBar->orientation());
    const ActionList actions = m_toolBar->actions();
    QAction *action = index != -1 ?actions.at(index) : 0;
    QVariant itemData;

    // Insert before
    if (action && index != 0 && !action->isSeparator()) {
        QAction *newSeperatorAct = new QAction(tr("Insert Separator before '%1'").arg(action->objectName()), 0);
        itemData.setValue(action);
        newSeperatorAct->setData(itemData);
        connect(newSeperatorAct, SIGNAL(triggered()), this, SLOT(slotInsertSeparator()));
        rc.push_back(newSeperatorAct);
    }

    // Append separator
    if (actions.empty() || !actions.back()->isSeparator()) {
        QAction *newSeperatorAct = new QAction(tr("Append Separator"), 0);
        itemData.setValue(static_cast<QAction*>(0));
        newSeperatorAct->setData(itemData);
        connect(newSeperatorAct, SIGNAL(triggered()), this, SLOT(slotInsertSeparator()));
        rc.push_back(newSeperatorAct);
    }
    // Promotion
    if (!m_promotionTaskMenu)
        m_promotionTaskMenu = new PromotionTaskMenu(m_toolBar, PromotionTaskMenu::ModeSingleWidget, this);
    m_promotionTaskMenu->addActions(formWindow(), PromotionTaskMenu::LeadingSeparator|PromotionTaskMenu::TrailingSeparator, rc);
    // Remove
    if (action) {
        QAction *a = new QAction(tr("Remove action '%1'").arg(action->objectName()), 0);
        itemData.setValue(action);
        a->setData(itemData);
        connect(a, SIGNAL(triggered()), this, SLOT(slotRemoveSelectedAction()));
        rc.push_back(a);
    }

    QAction *remove_toolbar = new QAction(tr("Remove Toolbar '%1'").arg(m_toolBar->objectName()), 0);
    connect(remove_toolbar, SIGNAL(triggered()), this, SLOT(slotRemoveToolBar()));
    rc.push_back(remove_toolbar);
    return rc;
}

// Determine the free area behind the last action.
QRect ToolBarEventFilter::freeArea(const QToolBar *tb)
{
    QRect rc = QRect(QPoint(0, 0), tb->size());
    const ActionList actionList = tb->actions();
    QRect exclusionRectangle = actionList.empty() ? handleArea(tb) : tb->actionGeometry(actionList.back());
    switch (tb->orientation()) {
    case Qt::Horizontal:
        switch (QApplication::layoutDirection()) {
        case Qt::LeftToRight:
            rc.setX(exclusionRectangle.right() + 1);
            break;
        case Qt::RightToLeft:
            rc.setRight(exclusionRectangle.x());
            break;
        }
        break;
    case Qt::Vertical:
        rc.setY(exclusionRectangle.bottom() + 1);
        break;
    }
    return rc;
}

void Driver::BuildActions(const ArgList &Args, ActionList &Actions) const {
  llvm::PrettyStackTraceString CrashInfo("Building compilation actions");
  // Start by constructing the list of inputs and their types.

  // Track the current user specified (-x) input. We also explicitly
  // track the argument used to set the type; we only want to claim
  // the type when we actually use it, so we warn about unused -x
  // arguments.
  types::ID InputType = types::TY_Nothing;
  Arg *InputTypeArg = 0;

  llvm::SmallVector<std::pair<types::ID, const Arg*>, 16> Inputs;
  for (ArgList::const_iterator it = Args.begin(), ie = Args.end(); 
       it != ie; ++it) {
    Arg *A = *it;

    if (isa<InputOption>(A->getOption())) {
      const char *Value = A->getValue(Args);
      types::ID Ty = types::TY_INVALID;

      // Infer the input type if necessary.
      if (InputType == types::TY_Nothing) {
        // If there was an explicit arg for this, claim it.
        if (InputTypeArg)
          InputTypeArg->claim();

        // stdin must be handled specially.
        if (memcmp(Value, "-", 2) == 0) {
          // If running with -E, treat as a C input (this changes the
          // builtin macros, for example). This may be overridden by
          // -ObjC below.
          //
          // Otherwise emit an error but still use a valid type to
          // avoid spurious errors (e.g., no inputs).
          if (!Args.hasArg(options::OPT_E, false))
            Diag(clang::diag::err_drv_unknown_stdin_type);
          Ty = types::TY_C;
        } else {
          // Otherwise lookup by extension, and fallback to ObjectType
          // if not found. We use a host hook here because Darwin at
          // least has its own idea of what .s is.
          if (const char *Ext = strrchr(Value, '.'))
            Ty = Host->lookupTypeForExtension(Ext + 1);

          if (Ty == types::TY_INVALID)
            Ty = types::TY_Object;
        }

        // -ObjC and -ObjC++ override the default language, but only for "source
        // files". We just treat everything that isn't a linker input as a
        // source file.
        // 
        // FIXME: Clean this up if we move the phase sequence into the type.
        if (Ty != types::TY_Object) {
          if (Args.hasArg(options::OPT_ObjC))
            Ty = types::TY_ObjC;
          else if (Args.hasArg(options::OPT_ObjCXX))
            Ty = types::TY_ObjCXX;
        }
      } else {
        assert(InputTypeArg && "InputType set w/o InputTypeArg");
        InputTypeArg->claim();
        Ty = InputType;
      }

      // Check that the file exists. It isn't clear this is worth
      // doing, since the tool presumably does this anyway, and this
      // just adds an extra stat to the equation, but this is gcc
      // compatible.
      if (memcmp(Value, "-", 2) != 0 && !llvm::sys::Path(Value).exists())
        Diag(clang::diag::err_drv_no_such_file) << A->getValue(Args);
      else
        Inputs.push_back(std::make_pair(Ty, A));

    } else if (A->getOption().isLinkerInput()) {
      // Just treat as object type, we could make a special type for
      // this if necessary.
      Inputs.push_back(std::make_pair(types::TY_Object, A));

    } else if (A->getOption().getId() == options::OPT_x) {
      InputTypeArg = A;      
      InputType = types::lookupTypeForTypeSpecifier(A->getValue(Args));

      // Follow gcc behavior and treat as linker input for invalid -x
      // options. Its not clear why we shouldn't just revert to
      // unknown; but this isn't very important, we might as well be
      // bug comatible.
      if (!InputType) {
        Diag(clang::diag::err_drv_unknown_language) << A->getValue(Args);
        InputType = types::TY_Object;
      }
    }
  }

  if (!SuppressMissingInputWarning && Inputs.empty()) {
    Diag(clang::diag::err_drv_no_input_files);
    return;
  }

  // Determine which compilation mode we are in. We look for options
//.........这里部分代码省略.........