From ceb83d5ab34f88851247d5b0ba67a99eafe56847 Mon Sep 17 00:00:00 2001
From: lejulien <leo.julien.42@gmail.com>
Date: Wed, 14 Jan 2026 13:33:48 +0100
Subject: [PATCH] wip

---
 CMakeLists.txt              |  1 +
 includes/context.hpp        |  2 ++
 includes/patern_preview.hpp | 29 +++++++++++++++++++++++++++++
 src/patern_preview.cpp      | 32 ++++++++++++++++++++++++++++++++
 src/paterns_menu.cpp        |  6 +++---
 5 files changed, 67 insertions(+), 3 deletions(-)
 create mode 100644 includes/patern_preview.hpp
 create mode 100644 src/patern_preview.cpp

diff --git a/CMakeLists.txt b/CMakeLists.txt
index f03cca0..63ea020 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -75,6 +75,7 @@ set(SRC_CXX_FILES "./src/main.cpp"
                   "./src/selection_menu.cpp"
                   "./src/selection.cpp"
                   "./src/paterns_menu.cpp"
+                  "./src/patern_preview.cpp"
                   "${rlImGui_SOURCE_DIR}/rlImGui.cpp"
                   "${imgui_SOURCE_DIR}/imgui.cpp"
                   "${imgui_SOURCE_DIR}/imgui_draw.cpp"
diff --git a/includes/context.hpp b/includes/context.hpp
index 7e3c99d..6cd2293 100644
--- a/includes/context.hpp
+++ b/includes/context.hpp
@@ -22,6 +22,7 @@ class SelectionMenu;
 class ControlMenu;
 class Selection;
 class PaternsMenu;
+class PaternPreview;
 
 typedef struct ctx {
   std::shared_ptr<World> world = nullptr;
@@ -32,6 +33,7 @@ typedef struct ctx {
   std::shared_ptr<ControlMenu> control_menu = nullptr;
   std::shared_ptr<Selection> selection = nullptr;
   std::shared_ptr<PaternsMenu> paterns_menu = nullptr;
+  std::shared_ptr<PaternPreview> patern_preview = nullptr;
   nlohmann::json config_json;
   std::filesystem::path program_dir;
 } ctx;
diff --git a/includes/patern_preview.hpp b/includes/patern_preview.hpp
new file mode 100644
index 0000000..e825597
--- /dev/null
+++ b/includes/patern_preview.hpp
@@ -0,0 +1,29 @@
+/*
+* File name: patern_preview.hpp
+* Author: lejulien
+* Date created: 01-01-1970 00:59:59
+// Date modified: 12-01-2026 21:30:10
+* ------
+*/
+
+#pragma once
+
+#include <memory>
+
+#include <context.hpp>
+
+namespace gol {
+
+class PaternPreview {
+public:
+  PaternPreview(std::shared_ptr<ctx>);
+  ~PaternPreview() = default;
+  void update();
+  void display();
+  void start();
+private:
+  bool is_started = false;
+  std::shared_ptr<ctx> context_;
+};
+
+} // namespace gol
diff --git a/src/patern_preview.cpp b/src/patern_preview.cpp
new file mode 100644
index 0000000..8141448
--- /dev/null
+++ b/src/patern_preview.cpp
@@ -0,0 +1,32 @@
+/*
+* File name: patern_preview.cpp
+* Author: lejulien
+* Date created: 01-01-1970 00:59:59
+// Date modified: 12-01-2026 21:30:10
+* ------
+*/
+
+#include <patern_preview.hpp>
+
+namespace gol {
+
+PaternPreview::PaternPreview(std::shared_ptr<ctx> context): context_(context) {}
+
+void PaternPreview::start() {
+  // TODO: load patern from pater menu
+  is_started = true;
+}
+
+void PaternPreview::update() {
+  if (!is_started) return;
+  // gather mousePos
+  // if right click stop the preview
+  // if left click, apply patern to current world
+  // mouse should pass through any present windows
+}
+
+void PaternPreview::display() {
+
+}
+
+};
diff --git a/src/paterns_menu.cpp b/src/paterns_menu.cpp
index d90212c..e1025d7 100644
--- a/src/paterns_menu.cpp
+++ b/src/paterns_menu.cpp
@@ -14,6 +14,7 @@
 #include <fstream>
 #include <iostream>
 #include <paterns_menu.hpp>
+#include <patern_preview.hpp>
 #include <sstream>
 
 namespace gol {
@@ -77,9 +78,8 @@ void PaternsMenu::display() {
     for (auto patern_name : paterns_name_list_) {
       ImGui::PushID(patern_name.c_str());
       if (ImGui::Button(patern_name.c_str()) &&
-          loadPatern(paterns_paths_list_[patern_name])) {
-        // TODO: If patern is loaded successfuly, start the preview in the
-        // editor
+        loadPatern(paterns_paths_list_[patern_name])) {
+        context_->patern_preview->start();
       }
       ImGui::PopID();
       ImGui::SameLine(ImGui::GetWindowWidth() - 57.);