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authorrodri <rgl@antares-labs.eu>2023-08-09 04:44:28 +0000
committerrodri <rgl@antares-labs.eu>2023-08-09 04:44:28 +0000
commit8ae635d95a0fe029ecb6b17b3dfc8b433e71fc9d (patch)
treeb7af455456797cbe0afd5aa71a1f1ed52544681a
downloadvolume-front.tar.gz
volume-front.tar.bz2
volume-front.zip
now version controlled.HEADfront
-rw-r--r--mkfile8
-rw-r--r--volume.c112
2 files changed, 120 insertions, 0 deletions
diff --git a/mkfile b/mkfile
new file mode 100644
index 0000000..41a3031
--- /dev/null
+++ b/mkfile
@@ -0,0 +1,8 @@
+</$objtype/mkfile
+
+BIN=/$objtype/bin
+TARG=volume
+OFILES=\
+ volume.$O
+
+</sys/src/cmd/mkone
diff --git a/volume.c b/volume.c
new file mode 100644
index 0000000..c1d394a
--- /dev/null
+++ b/volume.c
@@ -0,0 +1,112 @@
+#include <u.h>
+#include <libc.h>
+#include <draw.h>
+#include <event.h>
+
+enum {
+ SEC = 1000
+};
+
+int vfd, volume;
+int ismixfs;
+Image *knob;
+Image *back;
+Image *rim;
+
+Point
+volumept(Point c, int volume, int r)
+{
+ double rad;
+
+ rad = (double)(volume*3.0+30) * PI/180.0;
+ c.x -= sin(rad) * r;
+ c.y += cos(rad) * r;
+ return c;
+}
+
+void
+redraw(void)
+{
+ Point c;
+
+ c = divpt(addpt(screen->r.min, screen->r.max), 2);
+ draw(screen, screen->r, back, nil, ZP);
+ line(screen, volumept(c, 0, 45), volumept(c, 0, 40), 0, 0, 1, display->black, ZP);
+ line(screen, volumept(c, 100, 45), volumept(c, 100, 40), 0, 0, 1, display->black, ZP);
+ ellipse(screen, c, 40, 40, 1, rim, ZP);
+ fillellipse(screen, volumept(c, volume, 30), 3, 3, knob, ZP);
+}
+
+void
+update(void)
+{
+ char buf[256], *s;
+ int n;
+
+ if((n = pread(vfd, buf, sizeof(buf)-1, 0)) <= 0)
+ sysfatal("pread: %r");
+ buf[n] = 0;
+ strtok(buf, " ");
+ s = strtok(nil, " ");
+ volume = strtol(s, nil, 0);
+}
+
+void
+eresized(int new)
+{
+ if(new && getwindow(display, Refnone) < 0)
+ fprint(2, "can't reattach to window");
+ redraw();
+}
+
+void
+main()
+{
+ Mouse m;
+ Event e;
+ Point p;
+ double rad;
+ int Etimer, key, d;
+ char buf[3];
+
+ vfd = open("/dev/volume", ORDWR);
+ if(vfd < 0)
+ sysfatal("open: %r");
+ read(vfd, buf, sizeof buf);
+ ismixfs = strncmp(buf, "mix", 3) == 0;
+ update();
+ if(initdraw(0, 0, "volume") < 0)
+ sysfatal("initdraw: %r");
+ back = allocimagemix(display, 0x88FF88FF, DWhite);
+ knob = allocimage(display, Rect(0,0,1,1), CMAP8, 1, 0x008800FF);
+ rim = allocimage(display, Rect(0,0,1,1), CMAP8, 1, 0x004400FF);
+ einit(Emouse);
+ Etimer = etimer(0, 2*SEC);
+ redraw();
+ for(;;){
+ key = event(&e);
+ if(key == Emouse){
+ m = e.mouse;
+ if(m.buttons & 1){
+ p = subpt(m.xy, divpt(addpt(screen->r.min, screen->r.max), 2));
+ rad = atan2(-p.x, p.y);
+ d = rad * 180.0/PI;
+ if(d < 0)
+ d += 360;
+ d *= 160.0/360.0;
+ if(d < 30)
+ d = 0;
+ else if(d > 130)
+ d = 100;
+ else
+ d -= 30;
+ volume = d;
+ fprint(vfd, "%s%d", ismixfs? "mix " : "", volume);
+ redraw();
+ }
+ }else if(key == Etimer){
+ update();
+ redraw();
+ }
+ }
+}