Attachment 50107 Details for Bug 39989 – client that performs a passive SD grab

client that performs a passive SD grab

grab.c (text/x-csrc), 1.54 KB, created by Tom Jaeger on 2011-08-10 16:08:01 UTC

(hide)

Description:

Filename:

MIME Type:

Creator: Tom Jaeger

Created: 2011-08-10 16:08:01 UTC

Size: 1.54 KB

patch

obsolete

>/* gcc -Wall grab.c -o grab -lXi -lX11 */
>
>#include <X11/Xlib.h>
>#include <X11/extensions/XInput2.h>
>#include <stdlib.h>
>#include <stdio.h>
>#include <stdbool.h>
>
>Display *dpy;
>Window root;
>int opcode;
>
>void init_xi2() {
>	int event, error;
>	int major = 2, minor = 0;
>	if (!XQueryExtension(dpy, "XInputExtension", &opcode, &event, &error) ||
>			XIQueryVersion(dpy, &major, &minor) == BadRequest ||
>			major < 2) {
>		printf("Error: XI2 required\n");
>		exit(EXIT_FAILURE);
>	}
>}
>
>void grab(int dev) {
>	unsigned char mask_data[2] = { 0, 0 }; 
>	XISetMask(mask_data, XI_ButtonPress);
>	XISetMask(mask_data, XI_ButtonRelease);
>	XIEventMask mask = { XIAllDevices, sizeof(mask_data), mask_data };
>	XIGrabModifiers mods = { XIAnyModifier };
>	XIGrabButton(dpy, dev, 1, root, None, GrabModeAsync, GrabModeAsync, False, &mask, 1, &mods);
>}
>
>
>int main(int argc, char *argv[]) {
>	dpy = XOpenDisplay(NULL);
>	root = DefaultRootWindow(dpy);
>
>	init_xi2();
>	if (argc < 2) {
>		printf("Usage: %s <device number>\n", argv[0]);
>		return EXIT_FAILURE;
>	}
>	int dev = atoi(argv[1]);
>	if (dev < 0)
>		return EXIT_FAILURE;
>
>	grab(dev);
>
>	bool clicked = false;
>	int buttons = 0;
>
>	while (!clicked || buttons > 0) {
>		XEvent ev;
>		XNextEvent(dpy, &ev);
>		if (XGetEventData(dpy, &ev.xcookie) && ev.xcookie.extension == opcode) {
>			switch (ev.xcookie.evtype) {
>				case XI_ButtonPress:
>					printf("press\n");
>					buttons++;
>					clicked = true;
>					break;
>				case XI_ButtonRelease:
>					printf("release\n");
>					buttons--;
>					break;
>			}
>		}
>		XFreeEventData(dpy, &ev.xcookie);
>	}
>
>	return EXIT_SUCCESS;
>}

Actions: View

Attachments on bug 39989: 50107 | 50108 | 55197 | 59844

Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.