From 1164845b3c15f7cba49a80bd29cc450c1eb53eac Mon Sep 17 00:00:00 2001
From: "Geoffrey D. Bennett" <g@b4.vu>
Date: Tue, 16 Jan 2024 07:22:59 +1030
Subject: [PATCH] Allow for continuous dials

Update gtk_dial_new_with_range() to set round_digits to -1 if step is
zero.

Update create_levels_controls() to set step to zero.
---
 src/gtkdial.c       | 5 +++--
 src/window-levels.c | 2 +-
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/gtkdial.c b/src/gtkdial.c
index 4380d4d..f9c66a2 100644
--- a/src/gtkdial.c
+++ b/src/gtkdial.c
@@ -482,11 +482,12 @@ GtkWidget *gtk_dial_new_with_range(double min, double max, double step) {
   int digits;
 
   g_return_val_if_fail(min < max, NULL);
-  g_return_val_if_fail(step != 0.0, NULL);
 
   adj = gtk_adjustment_new(min, min, max, step, 10 * step, 0);
 
-  if (fabs(step) >= 1.0 || step == 0.0) {
+  if (step == 0.0) {
+    digits = -1;
+  } else if (fabs(step) >= 1.0) {
     digits = 0;
   } else {
     digits = abs((int)floor(log10(fabs(step))));
diff --git a/src/window-levels.c b/src/window-levels.c
index 90ceaf0..2c277cc 100644
--- a/src/window-levels.c
+++ b/src/window-levels.c
@@ -95,7 +95,7 @@ GtkWidget *create_levels_controls(struct alsa_card *card) {
         count_labels[j] = add_count_label(grid, j);
 
       // create the meter widget and attach to the grid
-      GtkWidget *meter = gtk_dial_new_with_range(-80, 0, 1);
+      GtkWidget *meter = gtk_dial_new_with_range(-80, 0, 0);
       gtk_widget_set_sensitive(meter, FALSE);
       card->meters[meter_num++] = meter;
       gtk_grid_attach(GTK_GRID(grid), meter, j + 1, i + 1, 1, 1);