DolphinQt: add warning if graphics mods are not enabled

Source/Core/DolphinQt/Config/GraphicsModWarningWidget.cpp

@@ -0,0 +1,70 @@
+// Copyright 2022 Dolphin Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "DolphinQt/Config/GraphicsModWarningWidget.h"
+
+#include <QHBoxLayout>
+#include <QLabel>
+#include <QPixmap>
+#include <QPushButton>
+#include <QStyle>
+
+#include "DolphinQt/Settings.h"
+
+GraphicsModWarningWidget::GraphicsModWarningWidget(QWidget* parent) : QWidget(parent)
+{
+  CreateWidgets();
+  ConnectWidgets();
+
+  connect(&Settings::Instance(), &Settings::EnableGfxModsChanged, this,
+          &GraphicsModWarningWidget::Update);
+  Update();
+}
+
+void GraphicsModWarningWidget::CreateWidgets()
+{
+  auto* icon = new QLabel;
+
+  const auto size = 1.5 * QFontMetrics(font()).height();
+
+  QPixmap warning_icon = style()->standardIcon(QStyle::SP_MessageBoxWarning).pixmap(size, size);
+
+  icon->setPixmap(warning_icon);
+
+  m_text = new QLabel();
+  m_config_button = new QPushButton(tr("Configure Dolphin"));
+
+  m_config_button->setHidden(true);
+
+  auto* layout = new QHBoxLayout;
+
+  layout->addWidget(icon);
+  layout->addWidget(m_text, 1);
+  layout->addWidget(m_config_button);
+
+  layout->setContentsMargins(0, 0, 0, 0);
+
+  setLayout(layout);
+}
+
+void GraphicsModWarningWidget::Update()
+{
+  bool hide_widget = true;
+  bool hide_config_button = true;
+
+  if (!Settings::Instance().GetGraphicModsEnabled())
+  {
+    hide_widget = false;
+    hide_config_button = false;
+    m_text->setText(tr("Graphics mods are currently disabled."));
+  }
+
+  setHidden(hide_widget);
+  m_config_button->setHidden(hide_config_button);
+}
+
+void GraphicsModWarningWidget::ConnectWidgets()
+{
+  connect(m_config_button, &QPushButton::clicked, this,
+          &GraphicsModWarningWidget::GraphicsModEnableSettings);
+}