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/* Simple program to toggle Translucency property on next window clicked
Uses dsimple.h and dsimple.c from xlsfonts.
Based on xprops and xwininfo
By Matthew Hawn
Use however you want. I can't stop you.
*/
#include <stdio.h>
#include <X11/Xlib.h>
#include <X11/Xatom.h>
#include "dsimple.h"
#include <stdlib.h>
Window target_win;
/* needed by dsimple.c */
void usage()
{
fprintf(stderr, "Bad arguments\n");
}
#define OPAQUE 0xffffffff
#define OPACITY "_NET_WM_WINDOW_OPACITY"
/* nothing fancy */
int main(int argc, char **argv)
{
int gotd = 0;
double d;
unsigned int opacity;
/* wonderful utility */
Setup_Display_And_Screen(&argc, argv);
if (argv[1])
{
printf ("got arg %s\n", argv[1]);
d = atof (argv[1]);
printf ("d is %g\n", d);
gotd = 1;
}
/* grab mouse and return window that is next clicked */
target_win = Select_Window(dpy);
unsigned char *data;
Atom actual;
int format;
unsigned long n, left;
if (gotd)
opacity = (unsigned int) (d * OPAQUE);
else
{
/* get property */
XGetWindowProperty(dpy, target_win, XInternAtom(dpy, OPACITY, False),
0L, 1L, False, XA_CARDINAL, &actual, &format, &n, &left,
(unsigned char **) &data);
if (data != None)
{
memcpy (&opacity, data, sizeof (unsigned int));
XFree(( void *) data );
printf("Found property: %g\n", (double) opacity / OPAQUE);
}
else
opacity = OPAQUE;
/* toggle */
if (opacity != OPAQUE)
opacity = OPAQUE;
else
opacity = 0xc0000000;
}
printf ("opacity 0x%x\n", opacity);
if (opacity == OPAQUE)
XDeleteProperty (dpy, target_win, XInternAtom(dpy, OPACITY, False));
/* set it */
else
XChangeProperty(dpy, target_win, XInternAtom(dpy, OPACITY, False),
XA_CARDINAL, 32, PropModeReplace,
(unsigned char *) &opacity, 1L);
XSync(dpy, False);
printf("Set Property to %g\n", (double) opacity / OPAQUE);
/* all done, wasn't that simple */
return 0;
}
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