From 7703dad36be85cb9c7fcffad2f629ce04c7bb7e7 Mon Sep 17 00:00:00 2001
From: Andreas Kling <kling@serenityos.org>
Date: Fri, 21 Aug 2020 20:02:12 +0200
Subject: [PATCH] ThemeEditor: Allow editing of theme colors one at a time

This is not perfect and kinda clunky to use, but these are the best
input widgets we have available at the moment, so let's make do with
what we have. :^)
---
 Applications/ThemeEditor/main.cpp | 66 ++++++++++++++++++++++++++++++-
 1 file changed, 65 insertions(+), 1 deletion(-)

diff --git a/Applications/ThemeEditor/main.cpp b/Applications/ThemeEditor/main.cpp
index bf469286d3..0b6a762038 100644
--- a/Applications/ThemeEditor/main.cpp
+++ b/Applications/ThemeEditor/main.cpp
@@ -1,12 +1,48 @@
 #include "PreviewWidget.h"
 #include <LibGUI/Application.h>
 #include <LibGUI/BoxLayout.h>
+#include <LibGUI/ColorInput.h>
+#include <LibGUI/ComboBox.h>
+#include <LibGUI/Model.h>
 #include <LibGUI/Window.h>
 
+class ColorRoleModel final : public GUI::Model {
+public:
+    virtual int row_count(const GUI::ModelIndex&) const { return m_color_roles.size(); }
+    virtual int column_count(const GUI::ModelIndex&) const { return 1; }
+    virtual GUI::Variant data(const GUI::ModelIndex& index, GUI::ModelRole role = GUI::ModelRole::Display) const
+    {
+        if (role == GUI::ModelRole::Display)
+            return Gfx::to_string(m_color_roles[(size_t)index.row()]);
+        return {};
+    }
+    virtual void update() { did_update(); }
+
+    explicit ColorRoleModel(const Vector<Gfx::ColorRole>& color_roles)
+        : m_color_roles(color_roles)
+    {
+    }
+
+    Gfx::ColorRole color_role(const GUI::ModelIndex& index) const
+    {
+        return m_color_roles[index.row()];
+    }
+
+    Gfx::ColorRole color_role(size_t index) const
+    {
+        return m_color_roles[index];
+    }
+
+private:
+    const Vector<Gfx::ColorRole>& m_color_roles;
+};
+
 int main(int argc, char** argv)
 {
     auto app = GUI::Application::construct(argc, argv);
 
+    Gfx::Palette preview_palette = app->palette();
+
     auto window = GUI::Window::construct();
     auto& main_widget = window->set_main_widget<GUI::Widget>();
     main_widget.set_fill_with_background_color(true);
@@ -16,7 +52,35 @@ int main(int argc, char** argv)
     preview_widget.set_preferred_size(480, 360);
     preview_widget.set_size_policy(GUI::SizePolicy::Fixed, GUI::SizePolicy::Fixed);
 
-    window->resize(500, 400);
+    auto& horizontal_container = main_widget.add<GUI::Widget>();
+    horizontal_container.set_layout<GUI::HorizontalBoxLayout>();
+    horizontal_container.set_preferred_size(0, 20);
+    horizontal_container.set_size_policy(GUI::SizePolicy::Fill, GUI::SizePolicy::Fixed);
+
+    auto& combo_box = horizontal_container.add<GUI::ComboBox>();
+    auto& color_input = horizontal_container.add<GUI::ColorInput>();
+
+    Vector<Gfx::ColorRole> color_roles;
+#define __ENUMERATE_COLOR_ROLE(role) color_roles.append(Gfx::ColorRole::role);
+    ENUMERATE_COLOR_ROLES(__ENUMERATE_COLOR_ROLE)
+#undef __ENUMERATE_COLOR_ROLE
+
+    combo_box.set_only_allow_values_from_model(true);
+    combo_box.set_model(adopt(*new ColorRoleModel(color_roles)));
+    combo_box.on_change = [&](auto&, auto& index) {
+        auto role = static_cast<const ColorRoleModel*>(index.model())->color_role(index);
+        color_input.set_color(preview_palette.color(role));
+    };
+
+    combo_box.set_selected_index((size_t)Gfx::ColorRole::Window - 1);
+
+    color_input.on_change = [&] {
+        auto role = static_cast<const ColorRoleModel*>(combo_box.model())->color_role(combo_box.selected_index());
+        preview_palette.set_color(role, color_input.color());
+        preview_widget.set_preview_palette(preview_palette);
+    };
+
+    window->resize(500, 500);
     window->show();
     return app->exec();
 }