C++ ListView::getIndex方法代码示例

//.........这里部分代码省略.........
        // set list view ex direction
        listView->setDirection(ui::ScrollView::Direction::HORIZONTAL);
        listView->setTouchEnabled(true);
        listView->setBounceEnabled(true);
        listView->setBackGroundImage("cocosui/green_edit.png");
        listView->setBackGroundImageScale9Enabled(true);
        listView->setContentSize(Size(240, 130));
        listView->setPosition(Vec2((widgetSize.width - backgroundSize.width) / 2.0f +
                                    (backgroundSize.width - listView->getContentSize().width) / 2.0f,
                                    (widgetSize.height - backgroundSize.height) / 2.0f +
                                    (backgroundSize.height - listView->getContentSize().height) / 2.0f));
        listView->addEventListener((ui::ListView::ccListViewCallback)CC_CALLBACK_2(UIListViewTest_Horizontal::selectedItemEvent, this));
        _uiLayer->addChild(listView);
        
        
        // create model
        Button* default_button = Button::create("cocosui/backtotoppressed.png", "cocosui/backtotopnormal.png");
        default_button->setName("Title Button");
        
        Layout *default_item = Layout::create();
        default_item->setTouchEnabled(true);
        default_item->setContentSize(default_button->getContentSize());
        default_button->setPosition(Vec2(default_item->getContentSize().width / 2.0f, default_item->getContentSize().height / 2.0f));
        default_item->addChild(default_button);
        
        // set model
        listView->setItemModel(default_item);
        
        // add default item
        ssize_t count = _array.size();
        for (int i = 0; i < count / 4; ++i)
        {
            listView->pushBackDefaultItem();
        }
        // insert default item
        for (int i = 0; i < count / 4; ++i)
        {
            listView->insertDefaultItem(0);
        }
        
        // add custom item
        for (int i = 0; i < count / 4; ++i)
        {
            Button* custom_button = Button::create("cocosui/button.png", "cocosui/buttonHighlighted.png");
            custom_button->setName("Title Button");
            custom_button->setScale9Enabled(true);
            custom_button->setContentSize(default_button->getContentSize());
            
            Layout* custom_item = Layout::create();
            custom_item->setContentSize(custom_button->getContentSize());
            custom_button->setPosition(Vec2(custom_item->getContentSize().width / 2.0f, custom_item->getContentSize().height / 2.0f));
            custom_item->addChild(custom_button);
            
            listView->pushBackCustomItem(custom_item);
        }
        // insert custom item
        Vector<Widget*>& items = listView->getItems();
        ssize_t items_count = items.size();
        for (int i = 0; i < count / 4; ++i)
        {
            Button* custom_button = Button::create("cocosui/button.png", "cocosui/buttonHighlighted.png");
            custom_button->setName("Title Button");
            custom_button->setScale9Enabled(true);
            custom_button->setContentSize(default_button->getContentSize());
            
            Layout* custom_item = Layout::create();
            custom_item->setContentSize(custom_button->getContentSize());
            custom_button->setPosition(Vec2(custom_item->getContentSize().width / 2.0f, custom_item->getContentSize().height / 2.0f));
            custom_item->addChild(custom_button);
            
            listView->insertCustomItem(custom_item, items_count);
        }
        
        // set item data
        items_count = items.size();
        for (int i = 0; i < items_count; ++i)
        {
            Widget *item = listView->getItem(i);
            Button *button = static_cast<Button*>(item->getChildByName("Title Button"));
            ssize_t index = listView->getIndex(item);
            button->setTitleText(_array[index]);
        }
        // remove last item
        listView->removeLastItem();
        
        // remove item by index
        items_count = items.size();
        listView->removeItem(items_count - 1);        
        
        // set all items layout gravity
        listView->setGravity(ListView::Gravity::CENTER_VERTICAL);
        
        // set items margin
        listView->setItemsMargin(2);
        
        return true;
    }
    
    return false;
}

// UIListViewTest_Magnetic
bool UIListViewTest_Magnetic::init()
{
    if(!UIScene::init())
    {
        return false;
    }
    
    Size layerSize = _uiLayer->getContentSize();
    
    _titleLabel = Text::create("Magnetic scroll", "fonts/Marker Felt.ttf", 32);
    _titleLabel->setAnchorPoint(Vec2::ANCHOR_MIDDLE);
    _titleLabel->setPosition(Vec2(layerSize / 2) + Vec2(0, _titleLabel->getContentSize().height * 3.15f));
    _uiLayer->addChild(_titleLabel, 3);
    
    // Create the list view
    _listView = ListView::create();
    _listView->setDirection(getListViewDirection());
    _listView->setBounceEnabled(true);
    _listView->setBackGroundImage("cocosui/green_edit.png");
    _listView->setBackGroundImageScale9Enabled(true);
    _listView->setContentSize(layerSize / 2);
    _listView->setScrollBarPositionFromCorner(Vec2(7, 7));
    _listView->setItemsMargin(2.0f);
    _listView->setAnchorPoint(Vec2::ANCHOR_MIDDLE);
    _listView->setPosition(layerSize / 2);
    _uiLayer->addChild(_listView);
    
    // Guide line for center align
    {
        DrawNode* pNode = DrawNode::create();
        Vec2 center = layerSize / 2;
        if(getListViewDirection() == ScrollView::Direction::HORIZONTAL)
        {
            float halfY = 110;
            pNode->drawLine(Vec2(center.x, center.y - halfY), Vec2(center.x, center.y + halfY), Color4F(0, 0, 0, 1));
        }
        else
        {
            float halfX = 150;
            pNode->drawLine(Vec2(center.x - halfX, center.y), Vec2(center.x + halfX, center.y), Color4F(0, 0, 0, 1));
        }
        pNode->setLineWidth(2);
        _uiLayer->addChild(pNode);
    }
    
    // Show the indexes of items on each boundary.
    {
        for(int i = 0; i < 5; ++i)
        {
            _indexLabels[i] = Text::create(" ", "fonts/Marker Felt.ttf", 12);
            _indexLabels[i]->setAnchorPoint(Vec2::ANCHOR_MIDDLE);
            _uiLayer->addChild(_indexLabels[i]);
        }
        float deltaX = 145, deltaY = 90;
        _indexLabels[0]->setPosition(_uiLayer->getContentSize() / 2 + Size(-deltaX, 0));   // left
        _indexLabels[1]->setPosition(_uiLayer->getContentSize() / 2 + Size(deltaX, 0));   // right
        _indexLabels[2]->setPosition(_uiLayer->getContentSize() / 2 + Size(0, deltaY));   // top
        _indexLabels[3]->setPosition(_uiLayer->getContentSize() / 2 + Size(0, -deltaY));   // bottom
        _indexLabels[4]->setPosition(_uiLayer->getContentSize() / 2 + Size(deltaX, deltaY));  // center
        
        // Callback
        _listView->ScrollView::addEventListener([this](Ref* ref, ScrollView::EventType eventType) {
            ListView* listView = dynamic_cast<ListView*>(ref);
            if(listView == nullptr || eventType != ScrollView::EventType::CONTAINER_MOVED)
            {
                return;
            }
            auto left = listView->getLeftmostItemInCurrentView();
            auto right = listView->getRightmostItemInCurrentView();
            auto top = listView->getTopmostItemInCurrentView();
            auto bottom = listView->getBottommostItemInCurrentView();
            auto center = listView->getCenterItemInCurrentView();
            
            _indexLabels[0]->setString(StringUtils::format("Left\nindex=%zd", listView->getIndex(left)));
            _indexLabels[1]->setString(StringUtils::format("RIght\nindex=%zd", listView->getIndex(right)));
            _indexLabels[2]->setString(StringUtils::format("Top index=%zd", listView->getIndex(top)));
            _indexLabels[3]->setString(StringUtils::format("Bottom index=%zd", listView->getIndex(bottom)));
            _indexLabels[4]->setString(StringUtils::format("Center\nindex=%zd", listView->getIndex(center)));
        });
    }
    
    // Initial magnetic type
    _listView->setMagneticType(ListView::MagneticType::NONE);
    _titleLabel->setString("MagneticType - NONE");
    
    // Magnetic change button
    auto pButton = Button::create("cocosui/backtotoppressed.png", "cocosui/backtotopnormal.png");
    pButton->setAnchorPoint(Vec2::ANCHOR_MIDDLE_LEFT);
    pButton->setScale(0.8f);
    pButton->setPosition(Vec2(layerSize / 2) + Vec2(130, -60));
    pButton->setTitleText("Next Magnetic");
    pButton->addClickEventListener([this](Ref*) {
        ListView::MagneticType eCurrentType = _listView->getMagneticType();
        ListView::MagneticType eNextType;
        std::string sString;
        if(eCurrentType == ListView::MagneticType::NONE)
        {
            eNextType = ListView::MagneticType::CENTER;
            sString = "CENTER";
//.........这里部分代码省略.........

//.........这里部分代码省略.........
        listView->setTouchEnabled(true);
        listView->setBounceEnabled(true);
        listView->setBackGroundImage("cocosui/green_edit.png");
        listView->setBackGroundImageScale9Enabled(true);
        listView->setSize(Size(240, 130));
        listView->setPosition(Point((widgetSize.width - backgroundSize.width) / 2.0f +
                                    (backgroundSize.width - listView->getSize().width) / 2.0f,
                                    (widgetSize.height - backgroundSize.height) / 2.0f +
                                    (backgroundSize.height - listView->getSize().height) / 2.0f));
        listView->addEventListenerListView(this, listvieweventselector(UIListViewTest_Vertical::selectedItemEvent));
        _uiLayer->addChild(listView);
        
        
        // create model
        Button* default_button = Button::create("cocosui/backtotoppressed.png", "cocosui/backtotopnormal.png");
        default_button->setName("Title Button");
        
        Layout* default_item = Layout::create();
        default_item->setTouchEnabled(true);
        default_item->setSize(default_button->getSize());
        default_button->setPosition(Point(default_item->getSize().width / 2.0f,
                                          default_item->getSize().height / 2.0f));
        default_item->addChild(default_button);
        
        // set model
        listView->setItemModel(default_item);
        
        // add default item
        ssize_t count = _array->count();
        for (int i = 0; i < count / 4; ++i)
        {
            listView->pushBackDefaultItem();
        }
        // insert default item
        for (int i = 0; i < count / 4; ++i)
        {
            listView->insertDefaultItem(0);
        }
        
        // add custom item
        for (int i = 0; i < count / 4; ++i)
        {
            Button* custom_button = Button::create("cocosui/button.png", "cocosui/buttonHighlighted.png");
            custom_button->setName("Title Button");
            custom_button->setScale9Enabled(true);
            custom_button->setSize(default_button->getSize());
            
            Layout *custom_item = Layout::create();
            custom_item->setSize(custom_button->getSize());
            custom_button->setPosition(Point(custom_item->getSize().width / 2.0f, custom_item->getSize().height / 2.0f));
            custom_item->addChild(custom_button);
            
            listView->pushBackCustomItem(custom_item);
        }
        // insert custom item
        Vector<Widget*>& items = listView->getItems();
        ssize_t items_count = items.size();
        for (int i = 0; i < count / 4; ++i)
        {
            Button* custom_button = Button::create("cocosui/button.png", "cocosui/buttonHighlighted.png");
            custom_button->setName("Title Button");
            custom_button->setScale9Enabled(true);
            custom_button->setSize(default_button->getSize());
            
            Layout *custom_item = Layout::create();
            custom_item->setSize(custom_button->getSize());
            custom_button->setPosition(Point(custom_item->getSize().width / 2.0f, custom_item->getSize().height / 2.0f));
            custom_item->addChild(custom_button);
            
            listView->insertCustomItem(custom_item, items_count);
        }
        
        // set item data
        items_count = items.size();
        for (int i = 0; i < items_count; ++i)
        {
            Widget* item = listView->getItem(i);
            Button* button = static_cast<Button*>(item->getChildByName("Title Button"));
            ssize_t index = listView->getIndex(item);
            button->setTitleText(static_cast<__String*>(_array->getObjectAtIndex(index))->getCString());
        }
        
        // remove last item
        listView->removeLastItem();
        
        // remove item by index
        items_count = items.size();
        listView->removeItem(items_count - 1);
        
        // set all items layout gravity
        listView->setGravity(LISTVIEW_GRAVITY_CENTER_VERTICAL);
        
        // set items margin
        listView->setItemsMargin(2.0f);
        
        return true;
    }
    
    return false;
}