// 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";
}
else if(eCurrentType == ListView::MagneticType::CENTER)
{
eNextType = ListView::MagneticType::BOTH_END;
sString = "BOTH_END";
}
else if(eCurrentType == ListView::MagneticType::BOTH_END)
{
if(getListViewDirection() == ScrollView::Direction::HORIZONTAL)
{
eNextType = ListView::MagneticType::LEFT;
sString = "LEFT";
}
else
{
eNextType = ListView::MagneticType::TOP;
sString = "TOP";
}
}
else if(eCurrentType == ListView::MagneticType::LEFT)
{
eNextType = ListView::MagneticType::RIGHT;
sString = "RIGHT";
}
else if(eCurrentType == ListView::MagneticType::RIGHT)
{
eNextType = ListView::MagneticType::NONE;
sString = "NONE";
}
else if(eCurrentType == ListView::MagneticType::TOP)
{
eNextType = ListView::MagneticType::BOTTOM;
sString = "BOTTOM";
}
else if(eCurrentType == ListView::MagneticType::BOTTOM)
{
eNextType = ListView::MagneticType::NONE;
sString = "NONE";
}
_listView->setMagneticType(eNextType);
_titleLabel->setString(StringUtils::format("MagneticType - %s", sString.c_str()));
});
_uiLayer->addChild(pButton);
// Add list items
static const Size BUTTON_SIZE(100, 70);
for (int i = 0; i < 40; ++i)
{
auto pButton = Button::create("cocosui/button.png", "cocosui/buttonHighlighted.png");
pButton->setContentSize(BUTTON_SIZE);
pButton->setScale9Enabled(true);
pButton->setTitleText(StringUtils::format("Button-%d", i));
_listView->pushBackCustomItem(pButton);
}
return true;
}
