Qt: Add Controller LED options (where supported)

src/duckstation-qt/colorpickerbutton.cpp

@@ -0,0 +1,50 @@
+// SPDX-FileCopyrightText: 2023 Connor McLaughlin <stenzek@gmail.com>
+// SPDX-License-Identifier: (GPL-3.0 OR CC-BY-NC-ND-4.0)
+
+#include "colorpickerbutton.h"
+#include "qtutils.h"
+
+#include <QtWidgets/QColorDialog>
+
+ColorPickerButton::ColorPickerButton(QWidget* parent) : QPushButton(parent)
+{
+  connect(this, &QPushButton::clicked, this, &ColorPickerButton::onClicked);
+  updateBackgroundColor();
+}
+
+u32 ColorPickerButton::color()
+{
+  return m_color;
+}
+
+void ColorPickerButton::setColor(u32 rgb)
+{
+  if (m_color == rgb)
+    return;
+
+  m_color = rgb;
+  updateBackgroundColor();
+}
+
+void ColorPickerButton::updateBackgroundColor()
+{
+  setStyleSheet(QStringLiteral("background-color: #%1;").arg(static_cast<uint>(m_color), 8, 16, QChar('0')));
+}
+
+void ColorPickerButton::onClicked()
+{
+  const u32 red = (m_color >> 16) & 0xff;
+  const u32 green = (m_color >> 8) & 0xff;
+  const u32 blue = m_color & 0xff;
+
+  const QColor initial(QColor::fromRgb(red, green, blue));
+  const QColor selected(QColorDialog::getColor(initial, QtUtils::GetRootWidget(this), tr("Select LED Color")));
+  if (initial == selected)
+    return;
+
+  const u32 new_rgb = (static_cast<u32>(selected.red()) << 16) | (static_cast<u32>(selected.green()) << 8) |
+                      static_cast<u32>(selected.blue());
+  m_color = new_rgb;
+  updateBackgroundColor();
+  emit colorChanged(new_rgb);
+}