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X11MouseClick code sample from a Linux Qt application
//
// Let's try the more straightforward X11 API to click the mouse
// This example code was harvested from the internet
//
// https://www.linuxquestions.org/questions/programming-9/simulating-a-mouse-click-594576/
//
// Another link is here
// https://stackoverflow.com/questions/27984220/x11-sending-a-mouse-click-without-moving-a-pointer
#include <QMainWindow>
#include <QDebug>
#include <QString>
#include <mouseclick.h>
//#include <stdio.h>
//#include <stdlib.h>
//#include <string.h>
#include <unistd.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
// open and close do nothing.
// we are going to open the display each time we click.
bool mouseopen()
{
return true;
}
bool mouseclose()
{
return true;
}
bool mouseclick()
{
int button = Button1; // just click button one. I'm sure it will be fine.
Display *display = XOpenDisplay(NULL);
XEvent event;
if(display == NULL)
{
qDebug() << QString("XOpenDisplay returned NULL");
return false;
//fprintf(stderr, "Errore nell'apertura del Display !!!\n");
//exit(EXIT_FAILURE);
}
memset(&event, 0x00, sizeof(event));
event.type = ButtonPress;
event.xbutton.button = button;
event.xbutton.same_screen = True;
XQueryPointer(display, RootWindow(display, DefaultScreen(display)),
&event.xbutton.root, &event.xbutton.window,
&event.xbutton.x_root, &event.xbutton.y_root,
&event.xbutton.x, &event.xbutton.y, &event.xbutton.state);
event.xbutton.subwindow = event.xbutton.window;
qDebug() << "Mouse Window " << event.xbutton.window;
#if 1 // don't look for a subwindow. Just use display. Is this Root?
while(event.xbutton.subwindow)
{
event.xbutton.window = event.xbutton.subwindow;
XQueryPointer(display, event.xbutton.window, &event.xbutton.root,
&event.xbutton.subwindow, &event.xbutton.x_root,
&event.xbutton.y_root, &event.xbutton.x, &event.xbutton.y, &event.xbutton.state);
}
#endif
qDebug() << "Mouse Subwindow" << event.xbutton.window;
if(XSendEvent(display, PointerWindow, True, 0xfff, &event) == 0)
{
qDebug() << QString("XSendEvent error XS1");
//fprintf(stderr, "Errore nell'invio dell'evento !!!\n");
}
else
{
qDebug() << "Button Press";
}
XFlush(display);
usleep(100000);
event.type = ButtonRelease;
event.xbutton.state = 0x100;
if(XSendEvent(display, PointerWindow, True, 0xfff, &event) == 0)
{
qDebug() << QString("XSendEvent error XS2");
//fprintf(stderr, "Errore nell'invio dell'evento !!!\n");
}
else
{
qDebug() << "Button Release";
}
XFlush(display);
XCloseDisplay(display);
return true;
}
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