Qt: Post processing UI

src/duckstation-qt/postprocessingchainconfigwidget.h

@@ -0,0 +1,45 @@
+#pragma once
+#include "common/types.h"
+#include "ui_postprocessingchainconfigwidget.h"
+#include "frontend-common/postprocessing_chain.h"
+#include <QtWidgets/QWidget>
+#include <optional>
+#include <memory>
+#include <string_view>
+
+namespace FrontendCommon {
+class PostProcessingChain;
+}
+
+class PostProcessingChainConfigWidget : public QWidget
+{
+  Q_OBJECT
+
+public:
+  PostProcessingChainConfigWidget(QWidget* parent);
+  ~PostProcessingChainConfigWidget();
+
+  bool setConfigString(const std::string_view& config_string);
+
+Q_SIGNALS:
+  void chainConfigStringChanged(const std::string& new_config_string);
+
+private Q_SLOTS:
+  void onAddButtonClicked();
+  void onRemoveButtonClicked();
+  void onClearButtonClicked();
+  void onMoveUpButtonClicked();
+  void onMoveDownButtonClicked();
+  void onShaderConfigButtonClicked();
+  void updateButtonStates();
+
+private:
+  void connectUi();
+  std::optional<u32> getSelectedIndex() const;
+  void updateList();
+  void configChanged();
+
+  Ui::PostProcessingChainConfigWidget m_ui;
+
+  FrontendCommon::PostProcessingChain m_chain;
+};