cocos2dx cocos2dx 3.x 公告栏 通知栏 滚动字幕 区域弹幕 区域显示 实现

.h

#pragma once
#include "cocos2d.h"
#include <iostream>
#include <stdio.h>

USING_NS_CC;
using namespace std;
class FlowWorld :public Node
{
protected:
    Node* _holder;
    Sprite* _newsBg;
    Label* _news;
    DrawNode* _shap;
    ClippingNode* _cliper;

public:

    static FlowWorld* fWorld;
    static FlowWorld* getIntance();

    FlowWorld* createFW(Sprite* sp);

    FlowWorld();
    ~FlowWorld();

    void scrollText(float);

    CREATE_FUNC(FlowWorld);
};

2..cpp

#include "FlowWorld.h"
#include "ScriptData.h"
#include "utill/SXMJUtill.h"

FlowWorld::FlowWorld()
{
    _holder = NULL;
    _newsBg = NULL;
    _news = NULL;
    _shap = NULL;
    _cliper = NULL;
}

FlowWorld::~FlowWorld() {}


FlowWorld* FlowWorld::fWorld = NULL;
FlowWorld* FlowWorld::getIntance(){

    if (!fWorld)
    {
        fWorld = new FlowWorld();
    }
    return fWorld;
}

FlowWorld* FlowWorld::createFW(Sprite* sp){

    Point p = Point(130.0f, 0.0f);
    float w = 600.0f;
    float h = 80.0f;

    auto shap = DrawNode::create();
    shap->clear();

    //标记显示的矩形区域
    Point point[4] = { Point(p.x, p.y), Point(p.x + w, p.y), Point(p.x + w, p.y + h), Point(p.x, h) };//标记显示的矩形区域
    shap->drawPolygon(point, 4, Color4F(355, 255, 255, 255), 2, Color4F(255, 255, 255, 255));
    shap->setColor(Color3B::RED);//剪切用于显示的矩形区域，参数对应；用于标识区域的Point(Vec2)数组指针，数组长度，填充颜色，边框宽度，边框颜色。

    auto cliper = ClippingNode::create();
    cliper->setStencil(shap);
    cliper->setAnchorPoint(Point(0.5, 0.5));

    vector<string>str;
    str.push_back(ScriptData<string>("Message1").Value());
    str.push_back(ScriptData<string>("Message2").Value());
    str.push_back(ScriptData<string>("Message3").Value());
    str.push_back(ScriptData<string>("Message1").Value());
    str.push_back(ScriptData<string>("Message2").Value());
    str.push_back(ScriptData<string>("Message3").Value());
    str.push_back(ScriptData<string>("Message1").Value());

    _news = Label::create(SXMJUtill::getIntance()->vectorToString(str), "Microsoft Yahei", 24);

    _news->setColor(Color3B::YELLOW);
    _news->setPosition(Point(p.x + w - 10, 37));
    _news->setAnchorPoint(Point::ZERO);

    cliper->addChild(_news);
    cliper->addChild(shap);
    sp->addChild(cliper);

    //layout();
    schedule(schedule_selector(FlowWorld::scrollText));//实现公告文字滚动

    return this;
}

void FlowWorld::scrollText(float)
{
    _news->getPosition().x < (-1 * _news->getContentSize().width) ? _news->setPositionX(720) : _news->setPositionX(_news->getPositionX() - 2);
}