Visual Servoing Platform version 3.6.0
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tutorial-event-keyboard.cpp
1
2#include <visp3/gui/vpDisplayD3D.h>
3#include <visp3/gui/vpDisplayGDI.h>
4#include <visp3/gui/vpDisplayGTK.h>
5#include <visp3/gui/vpDisplayOpenCV.h>
6#include <visp3/gui/vpDisplayX.h>
7
8int main()
9{
10 vpImage<unsigned char> I(240, 320); // Create a black image
11#if defined(VISP_HAVE_X11)
12 vpDisplay *d = new vpDisplayX;
13#elif defined(VISP_HAVE_GTK)
14 vpDisplay *d = new vpDisplayGTK;
15#elif defined(VISP_HAVE_GDI)
16 vpDisplay *d = new vpDisplayGDI;
17#elif defined(VISP_HAVE_D3D9)
18 vpDisplay *d = new vpDisplayD3D;
19#elif defined(HAVE_OPENCV_HIGHGUI)
21#else
22 std::cout << "Sorry, no video device is available" << std::endl;
23 return EXIT_FAILURE;
24#endif
25 // Initialize the display with the image I. Display and image are
26 // now link together.
27#ifdef VISP_HAVE_DISPLAY
28 d->init(I);
29#endif
30 // Set the display background with image I content
32 // Flush the foreground and background display
34 // Wait for keyboard event
35 std::cout << "Waiting a keyboard event..." << std::endl;
37 std::cout << "A keyboard event was detected" << std::endl;
38 // Non blocking keyboard event loop
39 int cpt_event = 0;
40 char key[10];
41 std::cout << "Enter a non blocking keyboard event detection loop..." << std::endl;
42 do {
43 bool event = vpDisplay::getKeyboardEvent(I, &key[0], false);
44 if (event) {
45 std::cout << "Key detected: " << key << std::endl;
46 cpt_event++;
47 }
48 vpTime::wait(5); // wait 5 ms
49 } while (cpt_event < 5);
50#ifdef VISP_HAVE_DISPLAY
51 delete d;
52#endif
53}
Display for windows using Direct3D 3rd party. Thus to enable this class Direct3D should be installed....
Display for windows using GDI (available on any windows 32 platform).
The vpDisplayGTK allows to display image using the GTK 3rd party library. Thus to enable this class G...
The vpDisplayOpenCV allows to display image using the OpenCV library. Thus to enable this class OpenC...
Use the X11 console to display images on unix-like OS. Thus to enable this class X11 should be instal...
Definition vpDisplayX.h:132
void init(vpImage< unsigned char > &I, int win_x=-1, int win_y=-1, const std::string &win_title="")
Class that defines generic functionalities for display.
Definition vpDisplay.h:173
static bool getKeyboardEvent(const vpImage< unsigned char > &I, bool blocking=true)
static void display(const vpImage< unsigned char > &I)
static void flush(const vpImage< unsigned char > &I)
Definition of the vpImage class member functions.
Definition vpImage.h:135
VISP_EXPORT int wait(double t0, double t)