wippatern_preview: Adding patern preview

This adds a preview of the patern placement, checking out of bound

includes/patern_preview.hpp

@@ -27,7 +27,6 @@ private:
   bool is_started = false;
   std::shared_ptr<ctx> context_;
   Vector2 mouse_pos_ = {0, 0};
-  bool is_unplacable_ = false;
 };
 
 } // namespace gol

includes/world.hpp

@@ -37,7 +37,6 @@ public:
   void setCell(int x, int y);
   void resize(int width, int height); // destructive
   std::vector<uint32_t> getSelection(Vector2i &origin, Vector2i &size);
-  void setSelection(Vector2i &origin, Vector2i &size, std::vector<uint32_t> &data);
 
   // Private members
 private:

src/patern_preview.cpp

@@ -30,28 +30,24 @@ void PaternPreview::update() {
     is_started = false;
     return;
   }
-  if (ImGui::IsMouseClicked(0) && !is_unplacable_) {
-    auto selection_pos =
-        screenToGrid(mouse_pos_, context_->settings_menu->getCellSize());
-    Vector2i size = {context_->paterns_menu->patern_width_,
-                     context_->paterns_menu->patern_height_};
-    context_->world->setSelection(selection_pos, size,
-                                  context_->paterns_menu->loaded_patern_);
-    is_started = false;
-  }
+  // if right click stop the preview
+  // if left click, apply patern to current world
   // mouse should pass through any present windows
 }
 
 void PaternPreview::display() {
   if (!is_started) return;
+  std::cout << "preview display started " << std::endl;
   auto cell_size = context_->settings_menu->getCellSize();
   auto mouse_in_grid =
       screenToGrid(mouse_pos_, context_->settings_menu->getCellSize());
-  is_unplacable_ =
+  bool is_unplacable =
       ((mouse_in_grid.x + context_->paterns_menu->patern_width_ >
         context_->world->getWidth()) ||
        (mouse_in_grid.y + context_->paterns_menu->patern_height_ >
         context_->world->getHeight()));
+  std::cout << "mx:" << mouse_in_grid.x << ", my:" << mouse_in_grid.y
+            << ", cs:" << context_->settings_menu->getCellSize() << std::endl;
   for (int j = 0; j < context_->paterns_menu->patern_height_; j++) {
     for (int i = 0; i < context_->paterns_menu->patern_width_; i++) {
       auto cell =
@@ -60,7 +56,7 @@ void PaternPreview::display() {
       if (cell) {
         DrawRectangle((i + mouse_in_grid.x) * cell_size,
                       (j + mouse_in_grid.y) * cell_size, cell_size, cell_size,
-                      (is_unplacable_) ? RED : BLUE);
+                      (is_unplacable) ? RED : BLUE);
       }
     }
   }

src/world.cpp

@@ -143,6 +143,7 @@ void World::resize(int width, int height) {
 }
 
 std::vector<uint32_t> World::getSelection(Vector2i &origin, Vector2i &size) {
+  // We assume the selection is in the grid for now
   std::vector<uint32_t> data = {static_cast<uint32_t>(size.x),
                                 static_cast<uint32_t>(size.y)};
   for (int y = origin.y; y < origin.y + size.y; y++) {
@@ -152,12 +153,3 @@ std::vector<uint32_t> World::getSelection(Vector2i &origin, Vector2i &size) {
   }
   return data;
 }
-
-void World::setSelection(Vector2i &origin, Vector2i &size, std::vector<uint32_t> &data) {
-  
-  for (int y = 0; y < size.y; y++) {
-    for (int x = 0; x < size.x; x++) {
-      (*_data)[(x + origin.x) + (y + origin.y) * _width] = data[x + y * size.x];
-    }
-  }
-}