Implementation of cocos2d-x Slider Control

TTSliderControl

The implementation code is as follows:

# Include <iostream> # include "cocos2d. h "# include" cocos-ext.h "USING_NS_CC; USING_NS_CC_EXT; # include" ClientDefine. h "# include" vector "# include" string "using namespace std; typedef struct _ SLIDER_INIT_STRUCT {CCSize m_sliderSize; // control size vector <CCNode *> m_nodes; // rolling node int m_curCenterIndex; // The subscript of the current most intermediate node, starting from 0} SLIDER_INIT_STRUCT; class TTSliderControl: public CCLayer {public: TTSliderControl ();~ TTSliderControl (); // implements cropping void visit (void); CREATE_FUNC (TTSliderControl) virtual bool init (); virtual void onEnter (); virtual void onExit (); virtual bool compute (CCTouch * pTouch, CCEvent * pEvent); virtual void ccTouchMoved (CCTouch * pTouch, CCEvent * pEvent); virtual void ccTouchEnded (CCTouch * pTouch, CCEvent * pEvent ); virtual void ccTouchCancelled (CCTouch * pTouch, CCEvent * pEvent); // determines whether the click is in the valid region bool isTouchInvalidated (CCTouch * touch); void initWithStruct (CCObject * pObj ); // move the node of an index to the middle void moveNodeToCenter (int index); // fine-tune the node to move the offset void moveNodeOffset (float offset ); // determine the int getCurCenterIndexInUI (); public: SLIDER_INIT_STRUCT m_initS; // The index in the UI is the final data int m_curIndex; // This index is the current data public: CC_SYNTHESIZE (SEL_CallFuncO, m_changeIndexSelector, ChangeIndexSelector); CC_SYNTHESIZE (CCNode *, m_target, Target );};

# Include "TTSliderControl. h" TTSliderControl: TTSliderControl () {m_target = NULL; m_changeIndexSelector = NULL; m_curIndex =-1;} TTSliderControl ::~ TTSliderControl () {}// implement cropping void TTSliderControl: visit (void) {glable (GL_SCISSOR_TEST); CCPoint selfPos = this-> getPosition (); CCSize selfContentSize = this-> getContentSize (); CCLOG ("selfPos = % d, % d, selfContentSize = % d, % d", selfPos. x, selfPos. y, selfContentSize. width, selfContentSize. height); float scaleX = CCEGLView: Export dopenglview ()-> getScaleX (); float scaleY = CCEGLView: Export dopenglview () -> GetScaleY (); CCRect viewPortRect = CCEGLView: Export dopenglview ()-> getViewPortRect (); glScissor (selfPos. x * scaleX + viewPortRect. origin. x, selfPos. y * scaleY + viewPortRect. origin. y, selfContentSize. width * scaleX, selfContentSize. height * scaleY); CCNode: visit (); // display the content of the parent class glDisable (GL_SCISSOR_TEST);} bool TTSliderControl: init () {// respond to the touch event CCDirector: sharedDirector ()-> getTouchDispatcher ()-> DdTargetedDelegate (this,-128-1, true); return true;} void TTSliderControl: onEnter () {CCLayer: onEnter ();} void TTSliderControl: onExit () {CCLayer: onExit (); CCDirector: shareddire()-> getTouchDispatcher ()-> removeDelegate (this);} bool TTSliderControl: ccTouchBegan (CCTouch * pTouch, CCEvent * pEvent) {if (isTouchInvalidated (pTouch) {return true;} else {return false ;}} void TTSliderControl:: CcTouchMoved (CCTouch * pTouch, CCEvent * pEvent) {CCPoint prePos = CCDirector ctor: shareddire()-> convertToGL (pTouch-> convert (); prePos = convertToNodeSpace (prePos ); CCPoint curPos = CCDirector: sharedDirector ()-> convertToGL (pTouch-> getLocationInView (); curPos = convertToNodeSpace (curPos); CCPoint offsetPos = ccpSub (curPos, prePos ); if (offsetPos. x) {moveNodeOffset (offsetPo S. x) ;}} void TTSliderControl: ccTouchEnded (CCTouch * pTouch, CCEvent * pEvent) {// CCPoint endPos = convertTouchToNodeSpace (pTouch); // determines which node is in the middle, then slide to the node center int curIndexUI = getCurCenterIndexInUI (); if (curIndexUI! =-1) {moveNodeToCenter (curIndexUI) ;}} void TTSliderControl: ccTouchCancelled (CCTouch * pTouch, CCEvent * pEvent) {}// determine whether the click is in the valid region bool TTSliderControl :: isTouchInvalidated (CCTouch * touch) {CCPoint touchLocation = touch-> getLocation (); CCPoint localLocation = this-> convertToNodeSpace (touchLocation); CCRect rc = CCRectMake (0, 0, this-> getContentSize (). width, this-> getContentSize (). height); if (rc. c OntainsPoint (localLocation) {return true;} else {return false ;}} void TTSliderControl: initWithStruct (CCObject * pObj) {if (pObj = NULL) {return ;} m_initS = * (SLIDER_INIT_STRUCT *) pObj; // determines the number of nodes. if it is null, if (m_initS.m_nodes.size () = 0) {return;} is returned directly ;} // make centerIndx within a reasonable range if (m_initS.m_curCenterIndex <0) {m_initS.m_curCenterIndex = 0;} if (m_initS.m_curCenterIndex> = m_initS.m_no Des. size () {m_initS.m_curCenterIndex = m_initS.m_nodes.size ()-1;} // set the widget size this-> setContentSize (m_initS.m_sliderSize ); // Add nodes to this for (int I = 0; I <m_initS.m_nodes.size (); I ++) {CCNode * tempNode = m_initS.m_nodes.at (I); if (tempNode) {this-> addChild (tempNode, 2) ;}// set the location of each child node based on centerIndex moveNodeToCenter (m_initS.m_curCenterIndex);} // move the node of an index to the middle void TTS LiderControl: moveNodeToCenter (int index) {// make centerIndex within a reasonable range if (index <0) {return;} if (index> = m_initS.m_nodes.size ()) {return;} m_initS.m_curCenterIndex = index; // traverse the entire m_nodes CCNode * centerSliderUnit = NULL; for (int I = 0; I <m_initS.m_nodes.size (); I ++) {CCNode * sliderUnit = (CCNode *) m_initS.m_nodes.at (I); // The default node's anchpoint is (0, 0) CCPoint newPoint; CCLOG ("node size = % f, % F ", sliderUnit-> getContentSize (). width, sliderUnit-> getContentSize (). height); newPoint. x = (I-m_initS.m_curCenterIndex) * sliderUnit-> getContentSize (). width; newPoint. y = (this-> getContentSize (). height-sliderUnit-> getContentSize (). height) * 0.5f; CCMoveTo * moveto = CCMoveTo: create (0.25f, newPoint); sliderUnit-> runAction (moveto);} // if the index is changed if (m_curIndex! = Cursor) {if (m_target & m_changeIndexSelector) {(m_target-> * m_changeIndexSelector) (this) ;}} m_curIndex = m_initS.m_curCenterIndex;} // fine-tuned to move node offsetvoid TTSliderControl :: moveNodeOffset (float offset) {// if no node exists, if (m_initS.m_nodes.size () = 0) {return;} // if it has reached the leftmost, you can no longer move it to the left and return CCNode * rightMostUnit = (CCNode *) m_initS.m_nodes.at (m_initS.m_nodes.size ()-1); if (rightMostUnit-> getPosition (). x <= 0 & offset <0) {return;} // if it has reached the rightmost and cannot be moved to the right, the CCNode * leftMostUnit = (CCNode *) is returned directly *) m_initS.m_nodes.at (0); if (leftMostUnit-> getPosition (). x> = 0 & offset> 0) {return;} // traverse. All nodes move int counter = m_initS.m_nodes.size (); for (int I = 0; I <counter; I ++) {CCNode * tempNode = (CCNode *) m_initS.m_nodes.at (I); CCPoint oldPoint = tempNode-> getPosition (); CCPoint newPoint = oldPoint; newPoint. x = oldPoint. x + offset; tempNode-> setPosition (newPoint) ;}// determines the int TTSliderControl: getCurCenterIndexInUI () in the middle of the UI. {// if no node exists, then return-1 if (m_initS.m_nodes.size () = 0) {return-1;} // traverse int counter = m_initS.m_nodes.size (); for (int I = 0; I <counter; I ++) {CCNode * tempNode = m_initS.m_nodes.at (I); CCPoint pos = tempNode-> getPosition (); CCSize size = tempNode-> getContentSize (); if (pos. x-size. width * 0.5f) <= 0 & (pos. x + size. width * 0.5f)> = 0) {return I;} return-1 ;}