CCTextFieldTTF 用法
原文出自
http://www.cnblogs.com/Rooty/archive/2012/07/16/2593296.html
CCTextFieldTTF是cocos2d-x封装的输入框控件，主要配合CCTextFieldDelegate和CCTouchDelegate两个代理接口使用，前者是用来处理文字的输入删除操作的代理类，后者是用来触发打开和关闭输入法键盘的。
借鉴网友oneRain88的“带光标的输入框”文章，在其基础上加入了密码框星号显示设置，字符长度设置，触摸弹出输入法区域设置。
文章链接：http://blog.csdn.net/onerain88/article/details/7572315，这篇文章对CCTextFieldTTF的使用原理讲的很好，封装的思路也很好，想了解原理可以去读读，本人只是在他的基础上加了一些小功能。在此也谢谢oneRain88的分享。
头文件代码：
#ifndef DTCursorTextField_h
#define DTCursorTextField_h
#include "cocos2d.h"
USING_NS_CC;
class DTCursorTextField: public CCTextFieldTTF, public CCTouchDelegate
,public CCTextFieldDelegate
{
private:
// 点击开始位置
CCPoint m_beginPos;
// 光标精灵
CCSprite *m_pCursorSprite;
// 光标动画
CCAction *m_pCursorAction;
// 光标坐标
CCPoint m_cursorPos;
// 是否加密显示
bool isPsw;
int m_limitNum;
// 输入框内容
//std::string *m_pInputText;
CCSize m_designedSize;
public:
DTCursorTextField();
~DTCursorTextField();
// static，暂时不能使用
// static DTCursorTextField * textFieldWithPlaceHolder(const char *placeholder, const CCSize& dimensions, CCTextAlignment alignment, const char *fontName, float fontSize);
/** creates a CCLabelTTF from a fontname and font size */
static DTCursorTextField * textFieldWithPlaceHolder(const char *placeholder, const char *fontName, float fontSize);
// CCLayer
void onEnter();
void onExit();
// 初始化光标精灵
void initCursorSprite(int nHeight);
void setColor(const ccColor3B& color3);
// CCTextFieldDelegate
virtual bool onTextFieldAttachWithIME(CCTextFieldTTF *pSender);
virtual bool onTextFieldDetachWithIME(CCTextFieldTTF * pSender);
virtual bool onTextFieldInsertText(CCTextFieldTTF * pSender, const char * text, int nLen);
virtual bool onTextFieldDeleteBackward(CCTextFieldTTF * pSender, const char * delText, int nLen);
// CCLayer Touch
bool ccTouchBegan(CCTouch *pTouch, CCEvent *pEvent);
void ccTouchEnded(CCTouch *pTouch, CCEvent *pEvent);
// 判断是否点击在TextField处
bool isInTextField(CCTouch *pTouch);
// 得到TextField矩形
CCRect getRect();
// 打开输入法
void openIME();
// 关闭输入法
void closeIME();
//设置是否星号显示
bool getIsPsw();
void setIsPsw(bool bFlag);
//设置字符长度限制，一个汉字三个字符
void setLimitNum(int limitNum);
int getLimitNum();
//重载原函数，用来显示星号
void setString(const char* displayTx, const char* inputTx);
//点击弹出输入法的尺寸范围
void setDesignedSize(CCSize size);
CCSize getDesignedSize();
};
#endif
#include "DTCursorTextField.h"
#include "CCNotificationCenter.h"
static int _calcCharCount(const char * pszText)
{
int n = 0;
char ch = 0;
while ((ch = *pszText))
{
CC_BREAK_IF(! ch);
if (0x80 != (0xC0 & ch))
{
++n;
}
++pszText;
}
return n;
}
const static float DELTA = 20.0f;
DTCursorTextField::DTCursorTextField()
{
CCTextFieldTTF();
m_pCursorSprite = NULL;
m_pCursorAction = NULL;
m_pInputText = NULL;
isPsw = false;
m_limitNum = 30;
}
DTCursorTextField::~DTCursorTextField()
{
//delete m_pInputText;
}
void DTCursorTextField::onEnter()
{
CCTextFieldTTF::onEnter();
CCDirector::sharedDirector()->getTouchDispatcher()->addTargetedDelegate(this, -128, false);
this->setDelegate(this);
}
//静态生成函数
DTCursorTextField * DTCursorTextField::textFieldWithPlaceHolder(const char *placeholder, const char *fontName, float fontSize)
{
DTCursorTextField *pRet = new DTCursorTextField();
if(pRet && pRet->initWithString("", fontName, fontSize))
{
pRet->autorelease();
if (placeholder)
{
pRet->setPlaceHolder(placeholder);
}
pRet->initCursorSprite(fontSize);
return pRet;
}
CC_SAFE_DELETE(pRet);
return NULL;
}
void DTCursorTextField::initCursorSprite(int nHeight)
{
// 初始化光标
int column = 4;
int pixels[nHeight][column];
for (int i=0; i<nHeight; ++i) {
for (int j=0; j<column; ++j) {
pixels[i][j] = 0xffffffff;
}
}
CCTexture2D *texture = new CCTexture2D();
texture->initWithData(pixels, kCCTexture2DPixelFormat_RGB888, 1, 1, CCSizeMake(column, nHeight));
m_pCursorSprite = CCSprite::create(texture);
CCSize winSize = getContentSize();
m_cursorPos = ccp(0, winSize.height / 2);
m_pCursorSprite->setPosition(m_cursorPos);
this->addChild(m_pCursorSprite);
m_pCursorAction = CCRepeatForever::create((CCActionInterval *) CCSequence::create(CCFadeOut::create(0.25f), CCFadeIn::create(0.25f), NULL));
m_pCursorSprite->runAction(m_pCursorAction);
m_pInputText = new std::string();
}
bool DTCursorTextField::ccTouchBegan(cocos2d::CCTouch *pTouch, cocos2d::CCEvent *pEvent)
{
m_beginPos = pTouch->locationInView();
m_beginPos = CCDirector::sharedDirector()->convertToGL(m_beginPos);
return true;
}
CCRect DTCursorTextField::getRect()
{
CCSize size;
if (&m_designedSize != NULL) {
size = m_designedSize;
}else {
size = getContentSize();
}
CCRect rect = CCRectMake(0 - size.width * getAnchorPoint().x, 0 - size.height * getAnchorPoint().y, size.width, size.height);
return rect;
}
//设置触摸弹出输入法的区域大小
void DTCursorTextField::setDesignedSize(cocos2d::CCSize size)
{
m_designedSize = size;
}
CCSize DTCursorTextField::getDesignedSize()
{
return m_designedSize;
}
bool DTCursorTextField::isInTextField(cocos2d::CCTouch *pTouch)
{
CCPoint pToushPos = convertTouchToNodeSpaceAR(pTouch);
return CCRect::CCRectContainsPoint(getRect(), pToushPos);
}
void DTCursorTextField::ccTouchEnded(cocos2d::CCTouch *pTouch, cocos2d::CCEvent *pEvent)
{
CCPoint endPos = pTouch->locationInView();
endPos = CCDirector::sharedDirector()->convertToGL(endPos);
// 判断是否为点击事件
if (::abs(endPos.x - m_beginPos.x) > DELTA ||
::abs(endPos.y - m_beginPos.y) > DELTA)
{
// 不是点击事件
m_beginPos.x = m_beginPos.y = -1;
return;
}
CCLOG("width: %f, height: %f.", getContentSize().width, getContentSize().height);
// 判断是打开输入法还是关闭输入法
isInTextField(pTouch) ? openIME() : closeIME();
}
bool DTCursorTextField::onTextFieldAttachWithIME(cocos2d::CCTextFieldTTF *pSender)
{
if (m_pInputText->empty()) {
return false;
}
m_pCursorSprite->setPositionX(getContentSize().width);
return false;
}
bool DTCursorTextField::onTextFieldInsertText(cocos2d::CCTextFieldTTF *pSender, const char *text, int nLen)
{
CCLOG("Width: %f", pSender->getContentSize().width);
CCLOG("Text: %s", text);
CCLOG("Length: %d", nLen);
std::string tempStr = m_pInputText->substr();
tempStr.append(text);
if (tempStr.length() > m_limitNum) {
return true;
}
m_pInputText->append(text);
if (isPsw) {
std::string tempStr;
for (int i = 0; i < m_pInputText->size(); i++) {
tempStr.append("*");
}
setString(tempStr.c_str(), m_pInputText->c_str());
}else {
setString(m_pInputText->c_str(), m_pInputText->c_str());
}
m_pCursorSprite->setPositionX(getContentSize().width);
return true;
}
bool DTCursorTextField::onTextFieldDeleteBackward(cocos2d::CCTextFieldTTF *pSender, const char *delText, int nLen)
{
m_pInputText->resize(m_pInputText->size() - nLen);
CCLog(m_pInputText->c_str());
if (isPsw) {
std::string tempStr;
for (int i = 0; i < m_pInputText->size(); i++) {
tempStr.append("*");
}
setString(tempStr.c_str(), m_pInputText->c_str());
}else {
setString(m_pInputText->c_str(), m_pInputText->c_str());
}
m_pCursorSprite->setPositionX(getContentSize().width);
if (m_pInputText->empty()) {
m_pCursorSprite->setPositionX(0);
}
return true;
}
bool DTCursorTextField::onTextFieldDetachWithIME(cocos2d::CCTextFieldTTF *pSender)
{
return false;
}
void DTCursorTextField::openIME()
{
m_pCursorSprite->setVisible(true);
this->attachWithIME();
}
void DTCursorTextField::closeIME()
{
m_pCursorSprite->setVisible(false);
this->detachWithIME();
}
void DTCursorTextField::onExit()
{
this->detachWithIME();
CCTextFieldTTF::onExit();
CCDirector::sharedDirector()->getTouchDispatcher()->removeDelegate(this);
}
bool DTCursorTextField::getIsPsw()
{
return isPsw;
}
//设置星号显示否
void DTCursorTextField::setIsPsw( bool bFlag)
{
isPsw = bFlag;
}
int DTCursorTextField::getLimitNum()
{
return m_limitNum;
}
//设置字符长度
void DTCursorTextField::setLimitNum(int limitNum)
{
m_limitNum = limitNum;
}
void DTCursorTextField::setString(const char *displayTx, const char* inputTx)
{
CC_SAFE_DELETE(m_pInputText);
if (inputTx)
{
m_pInputText = new std::string(inputTx);
}
else
{
m_pInputText = new std::string;
}
// if there is no input text, display placeholder instead
if (! m_pInputText->length())
{
CCLabelTTF::setString(m_pPlaceHolder->c_str());
}
else
{
CCLabelTTF::setString(displayTx);
}
m_nCharCount = _calcCharCount(m_pInputText->c_str());
}
void DTCursorTextField::setColor(const ccColor3B& color3)
{
m_sColor = m_sColorUnmodified = color3;
if (m_bOpacityModifyRGB)
{
m_sColor.r = color3.r * m_nOpacity/255.0f;
m_sColor.g = color3.g * m_nOpacity/255.0f;
m_sColor.b = color3.b * m_nOpacity/255.0f;
}
updateColor();
m_pCursorSprite->setColor(color3);
}
使用的时候，直接使用textFieldWithPlaceHolder函数生成一个对象指针，setIsPsw，setLimitNum，setDesignedSize，setColor分别实现星号显示，字符长度，触摸弹出输入法区域大小，字符颜色。
此控件还有一个小问题，还需要优化，而且，没有测试PC平台，所以，仅供参考。
本文来自：http://www.cnblogs.com/Rooty 转载请注明出处，谢谢合作。