eventsource.cpp

This example shows you how to use event sources to wait an multiple sources like Messages, DesktopCommunicationMessages and files (in this case stdin) while not blocking the GUI

#include <os/OS.h>
#include <gui/GUI.h>

using namespace SkyGI;
class TestView : public View
{
public:
        TestView(Window *pParent, const Rect &rFrame, unsigned int nWindowLayoutFlags);
};

TestView::TestView(Window *pParent, const Rect &rFrame, unsigned int nWindowLayoutFlags) : View(pParent, rFrame, nWindowLayoutFlags)
{
}

class MyApp : public Application
{
public:
        MyApp(int argc, char *argv[]);

        void ReceivedMessage(DesktopCommunicationInterface* pInterface, DesktopCommunicationMessage* pMessage)
        {
                printf("Received a DesktopCommunicationMessage!\n");
        }

        void StdinAvailable(int iFd, unsigned int uiFlags)
        {
                char ch;
                int iSize = 0;
                /*
                   Make sure to empty stdin here
            */
                fcntl(iFd, F_SETFL, O_NONBLOCK);

                while (read(iFd, &ch, 1)>0) iSize++;

                printf("Stdin data avilable! (%d byte)\n",iSize);
        }

private:
};


MyApp::MyApp(int argc, char *argv[]) : Application("sink", argc, argv)
{
        Rect r(Point(100, 100), Point(500, 440));
        int fd = 0; // stdin

        /*
            Create a DesktopCommunicationInterface and add it as an event source
        */
        DesktopCommunicationInterface *pInterface = new DesktopCommunicationInterface("test", true);
        pInterface->Received.Connect(this, &MyApp::ReceivedMessage);

        EventSourceDesktopCommunication *pEventSourceDesktopCommunication = new EventSourceDesktopCommunication(pInterface);
        Application::GetInstance()->GetEventQueue()->AddSource(pEventSourceDesktopCommunication );

        /*
            Add an event source to read from stdin
        */
        EventSourceFile *pEventSourceFile = new EventSourceFile(fd, EVENT_SOURCE_FILE_READ);
        pEventSourceFile->Available.Connect(this, &MyApp::StdinAvailable);
        Application::GetInstance()->GetEventQueue()->AddSource(pEventSourceFile);


        ApplicationWindow* pApplicationWindow = new ApplicationWindow(r, "DesktopCommunicationTest", WINDOW_LAYOUT_NOTHING, APPLICATION_WINDOW_NO_VIEW);
        
        pApplicationWindow->GetTitleWindow()->SetFlags( (TitleWindowFlags)(pApplicationWindow->GetTitleWindow()->GetFlags() ));
        pApplicationWindow->AttachView(new TestView(pApplicationWindow, pApplicationWindow->GetClientRect(), WINDOW_LAYOUT_NOTHING));
        pApplicationWindow->Show();
}

int main(int argc, char *argv[])
{
                MyApp pApp(argc, argv);

        return pApp.Run();


}

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