Qt，多线程上下文切换与QRadioButtons
Qt, multithreading context switching with QRadioButtons
嗨，伙计们，所以我试着用我现在的方式在不同的线程之间切换，让用户在多个单选按钮之间来回切换(这里我只显示了2)，当他们切换程序冻结。我想创建一个线程，停止它然后在进行单选按钮切换时创建另一个线程。我该如何做到这一点?
mainwindow.cpp
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
s1_thread = new skype_thread(this);
connect(s1_thread, SIGNAL(skype_sig(int)), this, SLOT(skype_change(int)));
x1_thread = new xlite_thread(this);
connect(x1_thread, SIGNAL(xlite_sig(int)), this, SLOT(xlite_change(int)));
}
void MainWindow::on_radioButton_3_toggled(bool checked) //Skype Application is checked
{
x1_thread->stop=true;
s1_thread->start();
}
void MainWindow::on_radioButton_toggled(bool checked) //X-Lite Application is checked
{
s1_thread->stop=true;
x1_thread->start();
}
skype_thread.cpp:
void skype_thread::run()
{
int err;
int skype_signal=0;
//Add programs you would like to use telephony hid here.
wchar_t skype[6] = L"Skype";
unsigned char data_usb[2];
int transfer_size = 4;
//Keyboard input event
INPUT ip;
//Device Handle
libusb_device_handle* dev;
//Initialize libusb with default device
libusb_init(NULL);
//Check whether the Red Button is meant to be a Hangup or Reject Button.
bool check_d = 0;
//Open Device VID = 0x04B4, PID = 0xE002 with the default libusb context
dev = libusb_open_device_with_vid_pid(NULL, VID, PID);
//Claim interface 3 on the device
err = libusb_claim_interface(dev, 3);
//Get first window on desktop
HWND firstwindow = FindWindowEx(NULL, NULL, NULL, NULL);
HWND window = firstwindow;
wchar_t windowtext[MAX_PATH]; //search term
//We need to get the console title in case we
//accidentally match the search word with it
//instead of the intended target window.
wchar_t consoletitle[MAX_PATH];
GetConsoleTitle(consoletitle, MAX_PATH);
//Error message for when window isn't found.
QString error_msg = NULL;
while(true){
//Check window title for a match
GetWindowText(window, windowtext, MAX_PATH);
if (wcsstr(windowtext, skype)!=NULL && wcscmp(windowtext, consoletitle)!=0) break; //search for program
window = FindWindowEx(NULL, window, NULL, NULL); //Get next window
}
while(true){
QMutex mutex;
mutex.lock();
//Differentiate the different button presses.
//Interrupt IN transfer
err = libusb_interrupt_transfer(dev, LIBUSB_ENDPOINT_IN | EP_IN, data_usb, sizeof(data_usb), &transfer_size, 1000);
if(transfer_size > 0){
if(data_usb[0]==0x02 && data_usb[1]==0x04){ //Pickup Button Payload
printf("Window found: %lsn", windowtext);
//Press the "Alt" key
ip.ki.wVk = 0x12; // virtual-key code for the "Alt" key
ip.ki.dwFlags = 0; // 0 for key press
SendInput(1, &ip, sizeof(INPUT));
//Release the "Alt" key
ip.ki.wVk = 0x12;
ip.ki.dwFlags = KEYEVENTF_KEYUP; // KEYEVENTF_KEYUP for key release
SendInput(1, &ip, sizeof(INPUT));
//Bring specified window into focus
SetForegroundWindow(window);
//Press the "Alt" key
ip.ki.wVk = 0x12; // virtual-key code for the "alt" key
ip.ki.dwFlags = 0; // 0 for key press
SendInput(1, &ip, sizeof(INPUT));
//Press the "Pageup" key
ip.ki.wVk = 0x21; // virtual-key code for the "pageup" key
ip.ki.dwFlags = 0; // 0 for key press
SendInput(1, &ip, sizeof(INPUT));
//Release the "Pageup" key
ip.ki.wVk = 0x21;
ip.ki.dwFlags = KEYEVENTF_KEYUP; // KEYEVENTF_KEYUP for key release
SendInput(1, &ip, sizeof(INPUT));
//Release the "Alt" key
ip.ki.wVk = 0x12;
ip.ki.dwFlags = KEYEVENTF_KEYUP; // KEYEVENTF_KEYUP for key release
SendInput(1, &ip, sizeof(INPUT));
check_d = 1;
}
if(data_usb[0]==0x02 && data_usb[1]==0x01 && check_d==1){ //Disconnect Button Payload
//Press the "Alt" key
ip.ki.wVk = 0x12; // virtual-key code for the "Alt" key
ip.ki.dwFlags = 0; // 0 for key press
SendInput(1, &ip, sizeof(INPUT));
//Release the "Alt" key
ip.ki.wVk = 0x12;
ip.ki.dwFlags = KEYEVENTF_KEYUP; // KEYEVENTF_KEYUP for key release
SendInput(1, &ip, sizeof(INPUT));
//Bring specified window into focus
SetForegroundWindow(window);
//Press the "Alt" key
ip.ki.wVk = 0x12; // virtual-key code for the "alt" key
ip.ki.dwFlags = 0; // 0 for key press
SendInput(1, &ip, sizeof(INPUT));
//Press the "Pagedown" key
ip.ki.wVk = 0x22; // virtual-key code for the "pageup" key
ip.ki.dwFlags = 0; // 0 for key press
SendInput(1, &ip, sizeof(INPUT));
//Release the "Pagedown" key
ip.ki.wVk = 0x22;
ip.ki.dwFlags = KEYEVENTF_KEYUP; // KEYEVENTF_KEYUP for key release
SendInput(1, &ip, sizeof(INPUT));
//Release the "Alt" key
ip.ki.wVk = 0x12;
ip.ki.dwFlags = KEYEVENTF_KEYUP; // KEYEVENTF_KEYUP for key release
SendInput(1, &ip, sizeof(INPUT));
check_d = 0;
}//end if
if(data_usb[0]==0x02 && data_usb[1]==0x01 && check_d==0){ //Reject Button Payload
//Press the "Alt" key
ip.ki.wVk = 0x12; // virtual-key code for the "Alt" key
ip.ki.dwFlags = 0; // 0 for key press
SendInput(1, &ip, sizeof(INPUT));
//Release the "Alt" key
ip.ki.wVk = 0x12;
ip.ki.dwFlags = KEYEVENTF_KEYUP; // KEYEVENTF_KEYUP for key release
SendInput(1, &ip, sizeof(INPUT));
//Bring specified window into focus
SetForegroundWindow(window);
//Press the "Ctrl"Key
ip.ki.wVk = 0x11; // virtual-key code for the "alt" key
ip.ki.dwFlags = 0; // 0 for key press
SendInput(1, &ip, sizeof(INPUT));
//Press the "Alt" key
ip.ki.wVk = 0x12; // virtual-key code for the "alt" key
ip.ki.dwFlags = 0; // 0 for key press
SendInput(1, &ip, sizeof(INPUT));
//Press the "Pagedown" key
ip.ki.wVk = 0x22; // virtual-key code for the "pageup" key
ip.ki.dwFlags = 0; // 0 for key press
SendInput(1, &ip, sizeof(INPUT));
//Release the "Pagedown" key
ip.ki.wVk = 0x22;
ip.ki.dwFlags = KEYEVENTF_KEYUP; // KEYEVENTF_KEYUP for key release
SendInput(1, &ip, sizeof(INPUT));
//Release the "Alt" key
ip.ki.wVk = 0x12;
ip.ki.dwFlags = KEYEVENTF_KEYUP; // KEYEVENTF_KEYUP for key release
SendInput(1, &ip, sizeof(INPUT));
//Release the "Ctrl" key
ip.ki.wVk = 0x11;
ip.ki.dwFlags = KEYEVENTF_KEYUP; // KEYEVENTF_KEYUP for key release
SendInput(1, &ip, sizeof(INPUT));
check_d = 0;
}//end if
}//end if
if(this->stop) break;
mutex.unlock();
emit skype_sig(skype_signal);
skype_signal++;
} //end while
}
xlite_thread.cpp
void xlite_thread::run()
{
int xlite_signal=0;
int err;
//Add programs you would like to use telephony hid here.
wchar_t xlite[7] = L"X-Lite";
unsigned char data_usb[2];
int transfer_size = 4;
//Keyboard input event
INPUT ip;
//Device Handle
libusb_device_handle* dev;
//Initialize libusb with default device
libusb_init(NULL);
//Check whether the Red Button is meant to be a Hangup or Reject Button.
bool check_d = 0;
//Open Device VID = 0x04B4, PID = 0xE002 with the default libusb context
dev = libusb_open_device_with_vid_pid(NULL, VID, PID);
//Claim interface 3 on the device
err = libusb_claim_interface(dev, 3);
//Get first window on desktop
HWND firstwindow = FindWindowEx(NULL, NULL, NULL, NULL);
HWND window = firstwindow;
wchar_t windowtext[MAX_PATH]; //search term
//We need to get the console title in case we
//accidentally match the search word with it
//instead of the intended target window.
wchar_t consoletitle[MAX_PATH];
GetConsoleTitle(consoletitle, MAX_PATH);
//Error message for when window isn't found.
QString error_msg = NULL;
while(true){
//Check window title for a match
GetWindowText(window, windowtext, MAX_PATH);
if (wcsstr(windowtext, xlite)!=NULL && wcscmp(windowtext, consoletitle)!=0) break; //search for program
window = FindWindowEx(NULL, window, NULL, NULL); //Get next window
}
while(true){
QMutex mutex;
mutex.lock();
//Differentiate the different button presses.
//Interrupt IN transfer
err = libusb_interrupt_transfer(dev, LIBUSB_ENDPOINT_IN | EP_IN, data_usb, sizeof(data_usb), &transfer_size, 1000);
if(transfer_size > 0){
if(data_usb[0]==0x02 && data_usb[1]==0x04){ //Pickup Button Payload
printf("Window found: %lsn", windowtext);
//Press the "Alt" key
ip.ki.wVk = 0x12; // virtual-key code for the "Alt" key
ip.ki.dwFlags = 0; // 0 for key press
SendInput(1, &ip, sizeof(INPUT));
//Release the "Alt" key
ip.ki.wVk = 0x12;
ip.ki.dwFlags = KEYEVENTF_KEYUP; // KEYEVENTF_KEYUP for key release
SendInput(1, &ip, sizeof(INPUT));
//Bring specified window into focus
SetForegroundWindow(window);
//Press the "Ctrl" key
ip.ki.wVk = 0xA2; // virtual-key code for the "alt" key
ip.ki.dwFlags = 0; // 0 for key press
SendInput(1, &ip, sizeof(INPUT));
//Press the "N" key
ip.ki.wVk = 0x4E; // virtual-key code for the "pageup" key
ip.ki.dwFlags = 0; // 0 for key press
SendInput(1, &ip, sizeof(INPUT));
//Release the "N" key
ip.ki.wVk = 0x4E;
ip.ki.dwFlags = KEYEVENTF_KEYUP; // KEYEVENTF_KEYUP for key release
SendInput(1, &ip, sizeof(INPUT));
//Release the "Ctrl" key
ip.ki.wVk = 0xA2;
ip.ki.dwFlags = KEYEVENTF_KEYUP; // KEYEVENTF_KEYUP for key release
SendInput(1, &ip, sizeof(INPUT));
check_d = 1;
}
if(data_usb[0]==0x02 && data_usb[1]==0x01 && check_d==1){ //Disconnect Button Payload
//Press the "Alt" key
ip.ki.wVk = 0x12; // virtual-key code for the "Alt" key
ip.ki.dwFlags = 0; // 0 for key press
SendInput(1, &ip, sizeof(INPUT));
//Release the "Alt" key
ip.ki.wVk = 0x12;
ip.ki.dwFlags = KEYEVENTF_KEYUP; // KEYEVENTF_KEYUP for key release
SendInput(1, &ip, sizeof(INPUT));
//Bring specified window into focus
SetForegroundWindow(window);
//Press the "Ctrl" key
ip.ki.wVk = 0xA2; // virtual-key code for the "alt" key
ip.ki.dwFlags = 0; // 0 for key press
SendInput(1, &ip, sizeof(INPUT));
//Press the "E" key
ip.ki.wVk = 0x45; // virtual-key code for the "pageup" key
ip.ki.dwFlags = 0; // 0 for key press
SendInput(1, &ip, sizeof(INPUT));
//Release the "E" key
ip.ki.wVk = 0x45;
ip.ki.dwFlags = KEYEVENTF_KEYUP; // KEYEVENTF_KEYUP for key release
SendInput(1, &ip, sizeof(INPUT));
//Release the "Ctrl" key
ip.ki.wVk = 0xA2;
ip.ki.dwFlags = KEYEVENTF_KEYUP; // KEYEVENTF_KEYUP for key release
SendInput(1, &ip, sizeof(INPUT));
check_d = 0;
}//end if
if(data_usb[0]==0x02 && data_usb[1]==0x01 && check_d==0){ //Reject Button Payload
//Press the "Alt" key
ip.ki.wVk = 0x12; // virtual-key code for the "Alt" key
ip.ki.dwFlags = 0; // 0 for key press
SendInput(1, &ip, sizeof(INPUT));
//Release the "Alt" key
ip.ki.wVk = 0x12;
ip.ki.dwFlags = KEYEVENTF_KEYUP; // KEYEVENTF_KEYUP for key release
SendInput(1, &ip, sizeof(INPUT));
//Bring specified window into focus
SetForegroundWindow(window);
//Press the "Ctrl" key
ip.ki.wVk = 0xA2; // virtual-key code for the "alt" key
ip.ki.dwFlags = 0; // 0 for key press
SendInput(1, &ip, sizeof(INPUT));
//Press the "D" key
ip.ki.wVk = 0x44; // virtual-key code for the "pageup" key
ip.ki.dwFlags = 0; // 0 for key press
SendInput(1, &ip, sizeof(INPUT));
//Release the "D" key
ip.ki.wVk = 0x44;
ip.ki.dwFlags = KEYEVENTF_KEYUP; // KEYEVENTF_KEYUP for key release
SendInput(1, &ip, sizeof(INPUT));
//Release the "Ctrl" key
ip.ki.wVk = 0xA2;
ip.ki.dwFlags = KEYEVENTF_KEYUP; // KEYEVENTF_KEYUP for key release
SendInput(1, &ip, sizeof(INPUT));
check_d = 0;
}//end if
}//end if
if(this->stop) break;
mutex.unlock();
emit xlite_sig(xlite_signal);
xlite_signal++;
} //end while
}
您最好使用对象和计时器来重复调用对象中的插槽(该插槽被移动到工作线程)
例如:class SkypeObject: public QObject{
Q_OBJECT
slots:
void start();
void loop();
void stop();
signals:
//...
}
然后在将其移动到后台线程后触发start和stop插槽。在循环槽内，您将while的主体并通过QTimer触发它(或使用startTimer并继承timerEvent(QTimerEvent))
而且，while循环中的互斥锁实际上并没有做任何事情来防止竞争条件，除了当stop为真时退出while时发生泄漏。
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