我在一份申请中想做类似的事情。 我将所有产出从标准流程(排出)转向我的ole窗。 定期阅读上游内容 对我的工作罚款。
StdRedirector.cpp
#include "StdRedirector.h"
QMutex coutMutex;
void outcallback(const char* ptr, std::streamsize count, void* bufferString)
{
string *b = (string *) bufferString;
string t;
for (int i=0; i < count; i++)
{
if (ptr[i] ==
)
{
t = t + "
";
} else {
t = t + ptr[i];
}
}
coutMutex.lock();
*b = *b + t;
coutMutex.unlock();
}
void ConsoleWindow::updateTimer(void)
{
coutMutex.lock();
if (bufferString.size() > 0)
{
consoleBox->insertPlainText(QString(bufferString.c_str()));
bufferString.clear();
QScrollBar *sb = consoleBox->verticalScrollBar();
sb->setValue(sb->maximum());
}
coutMutex.unlock();
}
ConsoleWindow::ConsoleWindow(QWidget *parent) : QWidget(parent)
{
consoleBox = new QTextEdit(this);
consoleBox->setReadOnly(true);
stdRedirector = new StdRedirector<>(std::cout, outcallback, &bufferString);
QVBoxLayout *vb = new QVBoxLayout();
vb->addWidget(consoleBox);
vb->setMargin(0);
vb->setSpacing(0);
setLayout(vb);
QTimer *timer = new QTimer(this);
connect(timer, SIGNAL(timeout()), this, SLOT(updateTimer()));
timer->start(100);
}
ConsoleWindow::~ConsoleWindow()
{
delete stdRedirector;
}
StdRedirector.h
#ifndef STD_REDIRECTOR
#define STD_REDIRECTOR
#include <QWidget>
#include <QTextEdit>
#include <QString>
#include <QVBoxLayout>
#include <QTimer.h>
#include <QMutex>
#include <QScrollBar>
#include <iostream>
#include <string>
using namespace std;
template<class Elem = char, class Tr = std::char_traits<Elem>>
class StdRedirector : public std::basic_streambuf<Elem, Tr>
{
typedef void (*pfncb) ( const Elem*, std::streamsize _Count, void* pUsrData );
public:
StdRedirector(std::ostream& a_Stream, pfncb a_Cb, void* a_pUsrData) :
m_Stream(a_Stream),
m_pCbFunc(a_Cb),
m_pUserData(a_pUsrData)
{
m_pBuf = m_Stream.rdbuf(this);
}
~StdRedirector()
{
m_Stream.rdbuf(m_pBuf);
}
std::streamsize xsputn(const Elem* _Ptr, std::streamsize _Count)
{
m_pCbFunc(_Ptr, _Count, m_pUserData);
return _Count;
}
typename Tr::int_type overflow(typename Tr::int_type v)
{
Elem ch = Tr::to_char_type(v);
m_pCbFunc(&ch, 1, m_pUserData);
return Tr::not_eof(v);
}
protected:
std::basic_ostream<Elem, Tr>& m_Stream;
std::streambuf* m_pBuf;
pfncb m_pCbFunc;
void* m_pUserData;
};
class ConsoleWindow : public QWidget
{
Q_OBJECT
public:
ConsoleWindow(QWidget *parent = 0);
~ConsoleWindow();
public slots:
void updateTimer(void);
public:
QTextEdit *consoleBox;
StdRedirector<> *stdRedirector;
string bufferString;
};
#endif
The StdRedirector category is based on code from this Forum post: