Visual Servoing Platform  version 3.2.0
tutorial-event-keyboard.cpp
#include <visp/vpConfig.h>
#include <visp/vpDisplayOpenCV.h>
#include <visp/vpDisplayX.h>
#include <visp/vpDisplayGTK.h>
#include <visp/vpDisplayGDI.h>
#include <visp/vpDisplayD3D.h>
int main()
{
vpImage<unsigned char> I(240, 320); // Create a black image
#if defined(VISP_HAVE_X11)
#elif defined(VISP_HAVE_GTK)
#elif defined(VISP_HAVE_GDI)
#elif defined(VISP_HAVE_D3D9)
#elif defined(VISP_HAVE_OPENCV)
#else
std::cout << "Sorry, no video device is available" << std::endl;
return -1;
#endif
// Initialize the display with the image I. Display and image are
// now link together.
#ifdef VISP_HAVE_DISPLAY
d->init(I);
#endif
// Set the display background with image I content
// Flush the foreground and background display
// Wait for keyboard event
std::cout << "Waiting a keyboard event..." << std::endl;
std::cout << "A keyboard event was detected" << std::endl;
// Non blocking keyboard event loop
int cpt_event = 0;
char key[10];
std::cout << "Enter a non blocking keyboard event detection loop..." << std::endl;
do {
bool event = vpDisplay::getKeyboardEvent(I, &key[0], false);
if (event) {
std::cout << "Key detected: " << key << std::endl;
cpt_event ++;
}
vpTime::wait(5); // wait 5 ms
} while(cpt_event < 5);
#ifdef VISP_HAVE_DISPLAY
delete d;
#endif
}
vpDisplayX
Use the X11 console to display images on unix-like OS. Thus to enable this class X11 should be instal...
Definition: vpDisplayX.h:150
vpTime::wait
VISP_EXPORT int wait(double t0, double t)
Definition: vpTime.cpp:149
vpDisplayGDI
Display for windows using GDI (available on any windows 32 platform).
Definition: vpDisplayGDI.h:128
vpDisplayD3D
Display for windows using Direct3D 3rd party. Thus to enable this class Direct3D should be installed....
Definition: vpDisplayD3D.h:106
vpDisplayOpenCV
The vpDisplayOpenCV allows to display image using the OpenCV library. Thus to enable this class OpenC...
Definition: vpDisplayOpenCV.h:141
vpDisplay::getKeyboardEvent
static bool getKeyboardEvent(const vpImage< unsigned char > &I, bool blocking=true)
Definition: vpDisplay_uchar.cpp:905
vpDisplay::display
static void display(const vpImage< unsigned char > &I)
Definition: vpDisplay_uchar.cpp:676
vpDisplayGTK
The vpDisplayGTK allows to display image using the GTK 3rd party library. Thus to enable this class G...
Definition: vpDisplayGTK.h:137
vpDisplayX::init
void init(vpImage< unsigned char > &I, int winx=-1, int winy=-1, const std::string &title="")
Definition: vpDisplayX.cpp:257
vpDisplay::flush
static void flush(const vpImage< unsigned char > &I)
Definition: vpDisplay_uchar.cpp:652
vpImage< unsigned char >
vpDisplay
Class that defines generic functionnalities for display.
Definition: vpDisplay.h:170