katja: Use the tab container for pages

cli/component.cpp

@@ -2,16 +2,57 @@
 
 namespace katja
 {
+    PageContainer::PageContainer(std::vector<std::pair<std::string, Page>> pages)
+    {
+        ftxui::Components menu_pages;
+
+        std::transform(std::cbegin(pages), std::cend(pages), std::back_inserter(menu_entries),
+                [](const std::pair<std::string, Page>& pair) { return pair.first; });
+        std::transform(std::cbegin(pages), std::cend(pages), std::back_inserter(menu_pages),
+                [](const std::pair<std::string, Page>& pair) { return pair.second; });
+
+        ftxui::MenuOption menu_option = ftxui::MenuOption::Horizontal();
+        this->menu = ftxui::Menu(&this->menu_entries, &this->menu_selected, menu_option);
+
+        this->content = ftxui::Container::Tab(menu_pages, &this->menu_selected);
+    }
+
+    ftxui::Element PageContainer::Render()
+    {
+        return ftxui::vbox({
+            this->menu->Render(),
+            this->content->Render()
+        });
+    }
+
+    bool PageContainer::OnEvent(ftxui::Event event)
+    {
+        if (event.character() == "q" && this->on_enter)
+        {
+            on_enter();
+            return true;
+        }
+        return menu->OnEvent(event);
+    }
+
     ftxui::Element WelcomePage::Render()
     {
         return ftxui::text("Select an action in the menu.");
     }
 
+    void WelcomePage::Load()
+    {
+    }
+
     UpdatesPage::UpdatesPage(std::vector<package_identifier>&& updatable)
         : updatable(std::move(updatable))
     {
     }
 
+    void UpdatesPage::Load()
+    {
+    }
+
     ftxui::Element UpdatesPage::Render()
     {
         std::vector<std::shared_ptr<ftxui::Node>> lines;
@@ -25,4 +66,8 @@ namespace katja
 
         return ftxui::window(summary, ftxui::vbox(lines));
     }
+
+    void SearchPage::Load()
+    {
+    }
 }

cli/component.hpp

@@ -1,27 +1,58 @@
 #pragma once
 
+#include <algorithm>
 #include <ftxui/component/component_base.hpp>
+#include <ftxui/component/component.hpp>
 
 #include "katja/repository.hpp"
 
 namespace katja
 {
-    class WelcomePage final : public ftxui::ComponentBase
+    class PageBase : public ftxui::ComponentBase
     {
+    public:
+        virtual void Load() = 0;
+    };
+
+    using Page = std::shared_ptr<PageBase>;
+
+    class PageContainer final : public ftxui::ComponentBase
+    {
+        int menu_selected{ 0 };
+        ftxui::Component menu;
+        ftxui::Component content;
+        std::vector<std::string> menu_entries;
+
+    public:
+        std::function<void()> on_enter;
+
+        PageContainer(std::vector<std::pair<std::string, Page>> pages);
+
+        ftxui::Element Render() override;
+        bool OnEvent(ftxui::Event event) override;
+    };
+
+    class WelcomePage final : public PageBase
+    {
+    public:
+        void Load() override;
         ftxui::Element Render() override;
     };
 
-    class UpdatesPage final : public ftxui::ComponentBase
+    class UpdatesPage final : public PageBase
     {
         std::vector<package_identifier> updatable;
 
     public:
         explicit UpdatesPage(std::vector<package_identifier>&& updatable);
 
+        void Load() override;
         ftxui::Element Render() override;
     };
 
-    class SearchPage final : public ftxui::ComponentBase
+    class SearchPage final : public PageBase
     {
+    public:
+        void Load() override;
     };
 }

cli/main.cpp

@@ -1,6 +1,5 @@
 #include <filesystem>
 
-#include <ftxui/component/component.hpp>
 #include <ftxui/component/screen_interactive.hpp>
 #include <ftxui/dom/elements.hpp>
 #include <toml.hpp>
@@ -9,46 +8,6 @@
 #include "katja/database.hpp"
 #include "component.hpp"
 
-class MyContainer final : public ftxui::ComponentBase
-{
-public:
-    std::vector<std::string> menu_entries;
-    std::vector<ftxui::Component> menu_pages;
-    int menu_selected{ 0 };
-    ftxui::Component menu;
-    std::function<void()> on_enter;
-
-    MyContainer(std::vector<std::pair<std::string, ftxui::Component>> pages)
-    {
-        std::transform(std::cbegin(pages), std::cend(pages), std::back_inserter(this->menu_entries),
-                [](const std::pair<std::string, ftxui::Component>& pair) { return pair.first; });
-        std::transform(std::cbegin(pages), std::cend(pages), std::back_inserter(this->menu_pages),
-                [](const std::pair<std::string, ftxui::Component>& pair) { return pair.second; });
-
-        ftxui::MenuOption menu_option = ftxui::MenuOption::Horizontal();
-        menu = ftxui::Menu(&this->menu_entries, &this->menu_selected, menu_option);
-    }
-
-    ftxui::Element Render() override
-    {
-        return ftxui::vbox({
-            this->menu->Render(),
-            this->menu_pages.at(this->menu_selected)->Render()
-        });
-    }
-
-    bool OnEvent(ftxui::Event event) override
-    {
-        if (event.character() == "q")
-        {
-            on_enter();
-            return true;
-        }
-        return menu->OnEvent(event);
-    }
-};
-
-
 int main(int argc, const char **argv)
 {
     auto configuration = toml::parse("config/katja.toml");
@@ -62,7 +21,7 @@ int main(int argc, const char **argv)
 
         auto screen = ftxui::ScreenInteractive::Fullscreen();
 
-        auto container = std::make_shared<MyContainer>(std::vector<std::pair<std::string, ftxui::Component>>{
+        auto container = std::make_shared<katja::PageContainer>(std::vector<std::pair<std::string, katja::Page>>{
             { "Home", std::make_shared<katja::WelcomePage>() },
             { "Updates", std::make_shared<katja::UpdatesPage>(std::move(updates)) },
             { "Search", std::make_shared<katja::SearchPage>() }