使用QProcess启动并嵌入带界面应用程序

//widget.cpp #include "widget.h" #include "ui_widget.h" #include <iostream> #include <list> #include <stdlib.h> #include <QProcess> #include <QWindow> using namespace std; #ifdef WIN32 #include <windows.h> WId Pid2Wid(quint64 procID, const char *lpszClassName) { char szBuf[256]; HWND hWnd = GetTopWindow(GetDesktopWindow()); while (hWnd) { DWORD wndProcID = 0; GetWindowThreadProcessId(hWnd, &wndProcID); if (wndProcID == procID) { GetClassName(hWnd, szBuf, sizeof(szBuf)); if (strcmp(szBuf, lpszClassName) == 0) { return (WId)hWnd; } } hWnd = GetNextWindow(hWnd, GW_HWNDNEXT); } return 0; } #else #include <X11/Xlib.h> #include <X11/Xatom.h> class WindowsMatchingPid { public: WindowsMatchingPid(Display *display, Window wRoot, unsigned long pid) : _display(display) , _pid(pid) { // Get the PID property atom. _atomPID = XInternAtom(display, "_NET_WM_PID", True); if (_atomPID == None) { cout << "No such atom" << endl; return; } search(wRoot); } inline const list<Window> &result() const { return _result; } private: unsigned long _pid; Atom _atomPID; Display *_display; list<Window> _result; private: void search(Window w) { // Get the PID for the current Window. Atom type; int format; unsigned long nItems; unsigned long bytesAfter; unsigned char *propPID = 0; if (Success == XGetWindowProperty(_display, w, _atomPID, 0, 1, False, XA_CARDINAL, &type, &format, &nItems, &bytesAfter, &propPID)) { if (propPID != 0) { // If the PID matches, add this window to the result set. if (_pid == *((unsigned long *)propPID)) _result.push_back(w); XFree(propPID); } } // Recurse into child windows. Window wRoot; Window wParent; Window *wChild; unsigned nChildren; if (0 != XQueryTree(_display, w, &wRoot, &wParent, &wChild, &nChildren)) { for (unsigned i = 0; i < nChildren; i++) search(wChild[i]); } } }; int Pid2Wid(int nPid) { // Start with the root window. char *pDsp = getenv("DISPLAY"); Display *display = XOpenDisplay(pDsp); if (display == NULL) { return 0; } WindowsMatchingPid match(display, XDefaultRootWindow(display), nPid); const list<Window> &result = match.result(); if (result.size()) { return (unsigned long)(*result.begin()); } else { return 0; } } #endif Widget::Widget(QWidget *parent) : QWidget(parent), ui(new Ui::Widget), m_Layout(this) { ui->setupUi(this); m_Layout.addWidget(ui->pushButton); } Widget::~Widget() { delete ui; } void Widget::on_pushButton_clicked() { QProcess *pProc = new QProcess(this); pProc->setProcessChannelMode(QProcess::ForwardedErrorChannel); #ifdef WIN32 pProc->start("Notepad"); pProc->waitForFinished(1000); WId wid = Pid2Wid(pProc->processId(), "Notepad"); #else pProc->start("xterm");// X11自带的xterm、xclock可以正确地被嵌入启动，xedit等能够被启动，不能得到窗口ID，故不能被正确嵌入。Qt编写的程序应该均能被正确嵌入。 pProc->waitForFinished(1000); WId wid = Pid2Wid(pProc->processId()); #endif QWindow *pWin = QWindow::fromWinId(wid); printf("%d\t%p\t%d\n", (int)pProc->processId(), pWin, (int)wid); if (pWin != NULL) { QWidget *pWid = QWidget::createWindowContainer(pWin, this); m_Layout.addWidget(pWid); m_Layout.update(); } }