1.不顯示警告
只需要加載空回調函數即可
如下:
Bool cb(TidyDoc tdoc,TidyReportLevel lvl,uint line,uint col,ctmbstr mssg)
{
return no;
}
tidySetReportFilter(doc,(TidyReportFilter)cb);
2.顯示節點文本
TidyBuffer buf;
tidyBufInit(&buf);
tidyNodeGetText(doc,body,&buf);
printf("text:%s",buf.bp);
tidyBufFree(&buf);
使用msvc開發QT插件，不能簡單的使用vc向導設置為dll開發，而應該使用qmake或者選擇qt的vc插件
要不然出現的插件 在獲取intance()的時候會是空值
#include <QThread>
#include <QMutex>
#include <QWaitCondition>
#include <QQueue>
#include <QVariant>
#include <iostream>
const int DataSize = 100;
const int BufferSize = 20;
QQueue<QVariant> queue;
QWaitCondition bufferIsNotFull;
QWaitCondition bufferIsNotEmpty;
QMutex mutex;
QMutex printMutex;
void print(int flag,int var)
{
printMutex.lock();
if(flag == 0)
std::cout<<"set:"<<var<<std::endl;
else
std::cout<<"get:"<<var<<std::endl;
printMutex.unlock();
}
class Producer : public QThread
{
public:
void run();
};
void Producer::run()
{
for(int i = 0; i < DataSize; ++i)
{
mutex.lock();
while(queue.size() == BufferSize)
bufferIsNotFull.wait(&mutex);
int var = std::rand()%10;
print(0,var);
queue.append(var);
bufferIsNotEmpty.wakeAll();
mutex.unlock();
}
}
class Consumer : public QThread
{
public:
void run();
};
void Consumer::run()
{
while(1)
{
mutex.lock();
while(queue.isEmpty())
bufferIsNotEmpty.wait(&mutex);
int var = queue.dequeue().toInt();
print(1,var);
bufferIsNotFull.wakeAll();
mutex.unlock();
}
}
int main()
{
Producer producer1;
Consumer consumer1;
Producer producer2;
Consumer consumer2;
producer1.start();
consumer1.start();
producer2.wait();
consumer2.wait();
system("pause");
return 0;
}
QT中QSyntaxHighlighter主要和QTextEdit配合使用，高亮顯示關鍵字
一個簡單的例子如下:
#ifndef HIGHLIGHTER_H
#define HIGHLIGHTER_H
#include <QSyntaxHighlighter>
#include <QTextCharFormat>
QT_BEGIN_NAMESPACE
class QTextDocument;
QT_END_NAMESPACE
class Highlighter : public QSyntaxHighlighter
{
Q_OBJECT
public:
Highlighter(QTextDocument *parent = 0);
public slots:
void setTextQueue(const QStringList& textQueue);
protected:
void highlightBlock(const QString &text);
private:
struct HighlightingRule
{
QRegExp pattern;
QTextCharFormat format;
};
QVector<HighlightingRule> highlightingRules;
QTextCharFormat keywordFormat;
};
#endif
.cpp
#include <QtGui>
#include "highlighter.h"
Highlighter::Highlighter(QTextDocument *parent)
: QSyntaxHighlighter(parent)
{
HighlightingRule rule;
keywordFormat.setForeground(Qt::darkRed);
keywordFormat.setFontWeight(QFont::Bold);
}
void Highlighter::highlightBlock(const QString &text)
{
foreach(const HighlightingRule &rule,highlightingRules)
{
QRegExp expression(rule.pattern);
int index = expression.indexIn(text);
while(index >= 0)
{
int length = expression.matchedLength();
setFormat(index,length,rule.format);
index = expression.indexIn(text, index + length);
}
}
setCurrentBlockState(0);
}
void Highlighter::setTextQueue(const QStringList& textQueue)
{
highlightingRules.clear();
HighlightingRule rule;
const QString tmp("\\b");
foreach(const QString& str,textQueue)
{
QString pattern(tmp);
pattern += str;
pattern += tmp;
rule.pattern = QRegExp(pattern);
rule.format = keywordFormat;
highlightingRules.append(rule);
}
}
在這里setTextQueue是傳入高亮顯示的文本列表
1.QString to const char*
QString string;
const char* str = string.toLatin1.data();
當然也可以 const char* s = string.toStdString().c_str();
2.QByteArray to char*
QByteArray arrary;
char* ch = arrary.data();
3.QString to QByteArray
QString str;
QByteArray array = str.toUtf8();
出現這個錯誤的原因在于在次線程中執行主線程對象的一些操作引起的
可以這樣修改
如果次線程需要更新主線程對象狀態，需要發送消息，主線程對象接收后處理而不能在此線程中直接操作
默認情況下QT是不支持中文的，一般在程序啟動的時候調用以下代碼，設置系統編碼方式即可
1 QTextCodec*codec= QTextCodec::codecForName("System");
2 QTextCodec::setCodecForLocale(codec);
3 QTextCodec::setCodecForCStrings(codec);
4 QTextCodec::setCodecForTr(codec);
5
簡單的例子如下:
#include <stdio.h>
#include <ao/ao.h>
#include <sndfile.h>
#include <math.h>
int main(int argc, char **argv)
{
SNDFILE* infile = 0;
SF_INFO sfinfo;
int readcount;
int rate = 44100;
int channels = 2;
if(!(infile = sf_open("rock.wav",SFM_READ,&sfinfo)))
{
return 1 ;
};
rate = sfinfo.samplerate;
printf("rate %d\n",rate);
channels = sfinfo.channels;
printf("channels %d\n",channels);
printf("format %d\n",sfinfo.format);
short data[4096];
ao_device *device;
ao_sample_format format;
int default_driver;
int i;
ao_initialize();
default_driver = ao_default_driver_id();
memset(&format, 0, sizeof(format));
format.bits = 16;
format.channels = channels;
format.rate = rate;
format.byte_format = AO_FMT_LITTLE;
device = ao_open_live(default_driver,&format, NULL);
if(device == NULL)
{
fprintf(stderr,"error opening device.\n");
return 1;
}
while((readcount = sf_read_short(infile,data,4096)))
{
ao_play(device,data,readcount*2);
};
sf_close (infile) ;
ao_close(device);
ao_shutdown();
return (0);
}
輸出到控制臺
#include <iostream>
#include <log4cplus/helpers/loglog.h>
using namespace std;
using namespace log4cplus::helpers;
void print_message()
{
cout << "Entering print_message()
" << endl;
LogLog::getLogLog()->debug(LOG4CPLUS_TEXT("This is a Debug statement"));
LogLog::getLogLog()->warn(LOG4CPLUS_TEXT("This is a Warning"));
LogLog::getLogLog()->error(LOG4CPLUS_TEXT("This is a Error"));
cout << "Exiting print_message()" << endl << endl;
}
int main()
{
print_message();
cout << "Turning on debug" << endl;
LogLog::getLogLog()->setInternalDebugging(true);
print_message();
cout << "Turning on quiet mode" << endl;
LogLog::getLogLog()->setQuietMode(true);
print_message();
system("pause");
return 0;
} 另外一個例子:
#include "log4cplus/logger.h"
#include "log4cplus/consoleappender.h"
#include "log4cplus/loglevel.h"
#include <iomanip>
using namespace std;
using namespace log4cplus;
int main()
{
SharedAppenderPtr append_1(new ConsoleAppender());
append_1->setName(LOG4CPLUS_TEXT("First"));
Logger::getRoot().addAppender(append_1);
Logger root = Logger::getRoot();
Logger test = Logger::getInstance(LOG4CPLUS_TEXT("test"));
LOG4CPLUS_DEBUG(root,
"This is"
<< " a reall"
<< "y long message." << endl
<< "Just testing it out" << endl
<< "What do you think?");
test.setLogLevel(NOT_SET_LOG_LEVEL);
LOG4CPLUS_DEBUG(test, "This is a bool: " << true);
LOG4CPLUS_INFO(test, "This is a char: " << 'x');
LOG4CPLUS_INFO(test, "This is a short: " << (short)-100);
LOG4CPLUS_INFO(test, "This is a unsigned short: " << (unsigned short)100);
LOG4CPLUS_INFO(test, "This is a int: " << (int)1000);
LOG4CPLUS_INFO(test, "This is a unsigned int: " << (unsigned int)1000);
LOG4CPLUS_INFO(test, "This is a long(hex): " << hex << (long)100000000);
LOG4CPLUS_INFO(test, "This is a unsigned long: " << (unsigned long)100000000);
LOG4CPLUS_WARN(test, "This is a float: " << (float)1.2345);
LOG4CPLUS_ERROR(test,
"This is a double: "
<< setprecision(15)
<< (double)1.2345234234);
LOG4CPLUS_FATAL(test,
"This is a long double: "
<< setprecision(15)
<< (long double)123452342342.342);
system("pause");
return 0;
}
再來看幾個輸出到日志的小例子:
#include <log4cplus/logger.h>
#include <log4cplus/fileappender.h>
#include <log4cplus/layout.h>
#include <log4cplus/ndc.h>
#include <log4cplus/helpers/loglog.h>
using namespace log4cplus;
const int LOOP_COUNT = 20000;
int main()
{
helpers::LogLog::getLogLog()->setInternalDebugging(true);
SharedAppenderPtr append_1(new RollingFileAppender(LOG4CPLUS_TEXT("Test.log"),5*1024,5));
append_1->setName(LOG4CPLUS_TEXT("LOG4PLUS"));
append_1->setLayout(std::auto_ptr<Layout>(new TTCCLayout()));
Logger::getRoot().addAppender(append_1);
Logger root = Logger::getRoot();
Logger test = Logger::getInstance(LOG4CPLUS_TEXT("test"));
Logger subTest = Logger::getInstance(LOG4CPLUS_TEXT("test.subtest"));
for(int i=0; i<LOOP_COUNT; ++i)
{
NDCContextCreator _context(LOG4CPLUS_TEXT("loop"));
LOG4CPLUS_DEBUG(subTest, "Entering loop #" << i);
}
return 0
}
幾點說明:
1.setInternalDebuging 是啟用內部調試日志，不過具體作用不是很明確
2.Appender是實現日志輸出的策略描述
一般情況下，參考以上例子就足夠了
#include <Qt/QFile.h>
#include <Qt/QDom.h>
#include <iostream>
void showNodeInfo(const QDomNode& node)
{
std::cout<<"node name:"<<node.nodeName().toStdString()<<std::endl;
QDomNode subnode = node.firstChild();
std::cout<<" node id:"<<subnode.nodeName().toStdString()<<std::endl;
std::cout<<" node id value:"<<subnode.toElement().text().toStdString()<<std::endl;
subnode = subnode.nextSibling();
std::cout<<" node name:"<<subnode.nodeName().toStdString()<<std::endl;
std::cout<<" node name value:"<<subnode.toElement().text().toStdString()<<std::endl;
subnode = subnode.nextSibling();
std::cout<<" node prefix:"<<subnode.nodeName().toStdString()<<std::endl;
std::cout<<" node prefix value:"<<subnode.toElement().text().toStdString()<<std::endl;
}
int main(int argc, char *argv[])
{
QDomDocument doc;
QFile xmlfile("config.xml");
if(!xmlfile.open(QIODevice::ReadOnly))return false;
if(doc.setContent(&xmlfile))
{
QDomElement root = doc.documentElement();
QDomNode node = root.firstChild();
for(;node.isNull()!=true;node=node.nextSibling())
showNodeInfo(node);
}
system("pause");
return 1;
}
基本步驟:
1.使用QFile載入文件
2.給QDomDocument設置文件內容
3.從QDomDocument獲取文檔根節點
4.遍歷節點并作處理