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续上篇：

W801学习笔记二十一：英语背单词学习应用——上

五、处理用户交互

由于英语也是采用了和唐诗一样的《三分钟限时挑战》《五十题竞速挑战》《零错误闯关挑战》，所以用户交互的逻辑和唐诗是一样的。所以，我们抽一个基类，让代码可以重用。

1、抽取基类

StudyBase 

class StudyBase : public IScean
{public:StudyBase(){};virtual ~StudyBase(){};
protected:u8 gameMode=0;u8 winMode=0;u8 isFinished=0;u16 correntCount =0;u16 wrongCount = 0;u32 totalTime=0;u32 lastTotalTime=0;//×○△□const char *controlInfo="EXIT: 返回     SELECT: 重新开始";const char *answerInfo="× 选择    ○ 选择    □ 选择    △ 选择";u16 answerBGColor[4] = {DBLUE, DRED, DGREEN, BROWN }; void startPrepare();void errorDelay(u8 t);u8 checkFinish();void showScore();void showTime();u8 answerTitle[4][8] = {{0x20,0xA1,0xC1,0x20,0x25,0x73,0x20, 0x0}, // × %s ,{0x20,0xA1,0xF0,0x20,0x25,0x73,0x20, 0x0},{0x20,0xA1,0xF5,0x20,0x25,0x73,0x20, 0x0},{0x20,0xA1,0xF7,0x20,0x25,0x73,0x20, 0x0}}; private:DisplayOption optionScore = {FONT_SIZE_1516, YELLOW, BLACK, 0, 0};DisplayOption optionCorrentCount = {FONT_SIZE_1516, GREEN, BLACK, 0, 0};DisplayOption optionWrongCount = {FONT_SIZE_1516, RED, BLACK, 0, 0};DisplayOption optionTime = {FONT_SIZE_1516, YELLOW, BLACK, 0, 0};DisplayOption optionDeCount = {FONT_SIZE_3232, WHITE, DRED, 1, 0};DisplayOption optionDelay = {FONT_SIZE_2424, WHITE, DRED, 0, 0};void finish();};

StudyBase.cpp

void StudyBase::errorDelay(u8 t){for(;t>0;t--){Display_String2(400, 50, &optionDelay,"  %d  ",t);tls_os_time_delay(1000);}Display_Fill_Rectangle2(400, 50, 80, 80, BLACK);
}u8 StudyBase::checkFinish(){switch (winMode) {case 1:if(totalTime > 180000) {finish();return 1;}break;case 2:if(correntCount+ wrongCount == 50) {finish();return 1;}break;case 3:if(wrongCount>0) {finish();return 1;}break;}return 0;
}void StudyBase::finish(){isFinished = 1;show_status_info(controlInfo);optionDeCount.backColor = DBLUE;Display_String(Prepare_LOC, &optionDeCount, "   挑 战 结 束   ");
}void StudyBase::showScore()
{int score = correntCount* 60 - wrongCount * 20;if(score<0 ) score =0;Display_String2(10, 5, &optionScore, "得分: %06d ", score);Display_String2(150, 5, &optionCorrentCount, "正确: %04d ", correntCount);Display_String2(270, 5, &optionWrongCount, "错误: %04d ", wrongCount);
}void StudyBase::showTime()
{if(lastTotalTime == totalTime/1000){return;}lastTotalTime = totalTime/1000;if(winMode == 2)Display_String2(400, 5, &optionTime, "%02d:%02d", ((180000- totalTime) / 1000) / 60, ((180000- totalTime) / 1000) % 60);elseDisplay_String2(400, 5, &optionTime, "%02d:%02d", (totalTime / 1000) / 60, (totalTime / 1000) % 60);	
}

2、继承基类

YingYu.h

typedef struct {uint16_t question;uint16_t answer[4];uint8_t ans;
} EngQuestion;class YingYu : public StudyBase
{public:YingYu();   ~YingYu();  SceanResult tick(u32 ticks);int scean_init(cJSON*  param);private:EngQuestion *currentQuestion;void start();void createQuestion();void createQuestionMode3();void showQuetion();void showAnswer();void correct();void wrong();DisplayOption optionQuetion = {FONT_SIZE_2424, YELLOW, BLACK, 1, 1};DisplayOption optionZY = {FONT_SIZE_2424, WHITE, BLACK, 1, 1};DisplayOption optionAnswer[4] = {{FONT_SIZE_1516, WHITE, answerBGColor[0], 0, 1},{FONT_SIZE_1516, WHITE, answerBGColor[1], 0, 1},{FONT_SIZE_1516, WHITE, answerBGColor[2], 0, 1}, {FONT_SIZE_1516, WHITE, answerBGColor[3], 0, 1}};u16 Eng_Answer_LOC_X=20;u16 Eng_Answer_LOC_Y[4] = {195,220,245,270};char errEngWord[4][40];unsigned char *DataBuff;int YingYuCount;
};

3、完成实现

YingYu.cpp

int YingYu::scean_init(cJSON*  param){setKeyAdepterIntervalAll(200);setKeyAdepterInterval(KEY_GPIO_A, 65535);setKeyAdepterInterval(KEY_GPIO_B, 65535);setKeyAdepterInterval(KEY_GPIO_C, 65535);setKeyAdepterInterval(KEY_GPIO_D, 65535);winMode= cJSON_GetObjectItem(param,"w")->valueint;gameMode = cJSON_GetObjectItem(param,"m")->valueint;printf("start chinese. winMode=%d, gameMode=%d.\n", winMode, gameMode);fatfs_readFile(cJSON_GetObjectItem(param,"f")->valuestring, &DataBuff);YingYuCount = DataBuff[12] | (DataBuff[13]<<8) | (DataBuff[14]<<16)| (DataBuff[15]<<24);start();return 0;
}
void YingYu::start(){startPrepare();show_status_info(answerInfo);showScore();createQuestion();showQuetion();
}

 看看效果：