qt 扫码枪扫描输入事件包含可输入字符

原因说明

当需要对扫码枪扫描出的信息进行处理或打印等，有多个办法，其中串口，中间件等不在本文章讨论内。如果在网上搜索相对于解决办法，发现有大多数都是对输入事件进行处理，但在没有找到好的处理之后，作者自行进行了一些处理如下：

部分代码

首先是事件处理类

class GlobalApplication : public QApplication, public QAbstractNativeEventFilter
{
public:GlobalApplication(int &argc,char **argv);~GlobalApplication();virtual bool nativeEventFilter(const QByteArray &eventType, void *message, long *result) override;//此为重构的处理函数
};

然后是实现重构代码

bool GlobalApplication::nativeEventFilter(const QByteArray &eventType, void *message, long *result)
{if(eventType == "windows_generic_MSG" || eventType == "windows_dispatcher_MSG"){//MSG* pMSG =(MSG*)message;//这里是对接收到的数据message进行处理，根据各自项目不同/*if(pMSG->message == WM_INPUT){unsigned short thisOne = raw->data.keyboard.VKey;handleScanCode(thisOne, curTime);//总之重点是在对信息的处理这函数里}*/}
}

最后是信息处理函数

void handleScanCode(unsigned short thisOne){//--------------------------------字母----------------------------------------------------if(thisOne >= 65 && thisOne <= 90){if (!isNextCodeGreater) {thisOne = thisOne+32;isNextCodeGreater = false;}curScanCode+=QChar(thisOne);}//---------------------------------------------------------------------------------------//----------------------------------特殊字符与数字------------------------------------------if (thisOne == 189) {//_-if (isNextCodeGreater) {thisOne = 95;} else {thisOne = 45;}curScanCode+=QChar(thisOne);}if (thisOne == 187) {//+=if (isNextCodeGreater) {thisOne = 43;} else {thisOne = 61;}curScanCode+=QChar(thisOne);}if (thisOne == 219) {//{[if (isNextCodeGreater) {thisOne = 123;} else {thisOne = 91;}curScanCode+=QChar(thisOne);}if (thisOne == 221) {//}]if (isNextCodeGreater) {thisOne = 125;} else {thisOne = 93;}curScanCode+=QChar(thisOne);}if (thisOne == 188) {//<,if (isNextCodeGreater) {thisOne = 60;} else {thisOne = 44;}curScanCode+=QChar(thisOne);}if (thisOne == 190) {//>.if (isNextCodeGreater) {thisOne = 62;} else {thisOne = 46;}curScanCode+=QChar(thisOne);}if (thisOne == 191) {//?/if (isNextCodeGreater) {thisOne = 63;} else {thisOne = 47;}curScanCode+=QChar(thisOne);}if (thisOne == 186) {//:;if (isNextCodeGreater) {thisOne = 58;} else {thisOne = 59;}curScanCode+=QChar(thisOne);}if (thisOne == 222) {//"'if (isNextCodeGreater) {thisOne = 34;} else {thisOne = 39;}curScanCode+=QChar(thisOne);}if (thisOne == 220) {// |if (isNextCodeGreater) {thisOne = 124;} else {thisOne = 92;}curScanCode+=QChar(thisOne);}if (thisOne >= 48 && thisOne <= 57) {if (isNextCodeGreater) {map<unsigned short, unsigned short> numberToSymbol = {{48,41}, {49,33}, {50,64}, {51,35}, {52,36},{53,37}, {54,94}, {55,38}, {56,42}, {57,40}};thisOne = numberToSymbol[thisOne];}curScanCode+=QChar(thisOne);}//---------------------------------------------------------------------------------------if (thisOne == 16) {isNextCodeGreater = true;} else {isNextCodeGreater = false;}
}