1 files changed, 65 insertions, 0 deletions
diff --git a/src/busyindicator.cpp b/src/busyindicator.cpp
new file mode 100644
index 0000000..0ccc719
--- /dev/null
+++ b/src/busyindicator.cpp
@@ -0,0 +1,65 @@
+/*
+ * qtmaildir - a Qt6 mail client for notmuch-indexed Maildirs
+ * Copyright (C) 2026 Danilo M. <danix@danix.xyz>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "busyindicator.h"
+
+BusyIndicator::BusyIndicator(QWidget *parent)
+    : QProgressBar(parent)
+{
+    // Starts indeterminate and hidden, which is what both consumers want
+    // before anything is happening. A caller that wants a fraction calls
+    // setProgress() and never sees this range.
+    setRange(0, 0);
+
+    // The percentage would be meaningless in the indeterminate mode and is
+    // redundant beside the phase text in the determinate one, where the popup
+    // says what is being waited for.
+    setTextVisible(false);
+    hide();
+}
+
+void BusyIndicator::setBusy(bool busy)
+{
+    setRange(0, 0);
+    setVisible(busy);
+}
+
+void BusyIndicator::setProgress(int value, int total)
+{
+    if (total <= 0) {
+        // Not an empty determinate bar: setRange(0, 0) IS the indeterminate
+        // range, so falling through here would hand the caller an animating
+        // bar while it believed it had shown a fraction.
+        setBusy(true);
+        return;
+    }
+
+    setRange(0, total);
+    setValue(qBound(0, value, total));
+    show();
+}
+
+bool BusyIndicator::isBusy() const
+{
+    return isVisible();
+}
+
+bool BusyIndicator::isDeterminate() const
+{
+    return maximum() > minimum();
+}