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added opacity. #16

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added opacity. #16

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13 changes: 12 additions & 1 deletion highlight-pointer.c
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Original file line number Diff line number Diff line change
Expand Up @@ -97,6 +97,7 @@ static struct {
int highlight_visible;
int outline;
int radius;
double opacity; // Add opacity field
} options;

static void redraw();
Expand Down Expand Up @@ -187,6 +188,11 @@ static int init_window() {
return 1;
}

// Set window opacity
unsigned long opacity_value = (unsigned long)(options.opacity * 0xFFFFFFFF);
Atom opacity_atom = XInternAtom(dpy, "_NET_WM_WINDOW_OPACITY", False);
XChangeProperty(dpy, win, opacity_atom, XA_CARDINAL, 32, PropModeReplace, (unsigned char*)&opacity_value, 1);

XClassHint class_hint;
XStoreName(dpy, win, "highlight-pointer");
class_hint.res_name = "highlight-pointer";
Expand Down Expand Up @@ -493,6 +499,7 @@ static void print_usage(const char* name) {
" -p, --pressed-color COLOR dot color when mouse button pressed [default: #1f77b4]\n"
" -o, --outline OUTLINE line width of outline or 0 for filled dot [default: 0]\n"
" -r, --radius RADIUS dot radius in pixels [default: 5]\n"
" --opacity OPACITY window opacity (0.0 - 1.0) [default: 1.0]\n"
" --hide-highlight start with highlighter hidden\n"
" --show-cursor start with cursor shown\n"
"\n"
Expand Down Expand Up @@ -527,6 +534,7 @@ static struct option long_options[] = {{"auto-hide-cursor", no_argument, &option
{"hide-timeout", required_argument, NULL, 't'},
{"outline", required_argument, NULL, 'o'},
{"pressed-color", required_argument, NULL, 'p'},
{"opacity", required_argument, NULL, 'a'},
{"radius", required_argument, NULL, 'r'},
{"released-color", required_argument, NULL, 'c'},
{"show-cursor", no_argument, &options.cursor_visible, 1},
Expand All @@ -542,6 +550,7 @@ static int set_options(int argc, char* argv[]) {
options.auto_hide_highlight = 0;
options.cursor_visible = 0;
options.highlight_visible = 1;
options.opacity = 1.0;
options.radius = 5;
options.outline = 0;
options.hide_timeout = 3;
Expand All @@ -564,7 +573,9 @@ static int set_options(int argc, char* argv[]) {
switch (c) {
case 0:
break;

case 'a':
options.opacity = atof(optarg);
break;
case 'c':
options.released_color_string = optarg;
break;
Expand Down