Popout PaletteEditor, general housekeeping

src/app/gui/canvas.h

@@ -0,0 +1,72 @@
+#ifndef YAZE_GUI_CANVAS_H
+#define YAZE_GUI_CANVAS_H
+
+#include <imgui/imgui.h>
+
+#include <cmath>
+#include <string>
+
+#include "app/gfx/bitmap.h"
+#include "app/rom.h"
+
+namespace yaze {
+namespace gui {
+
+using app::gfx::Bitmap;
+
+class Canvas {
+ public:
+  Canvas() = default;
+  explicit Canvas(ImVec2 canvas_size)
+      : custom_canvas_size_(true), canvas_sz_(canvas_size) {}
+
+  void DrawBackground(ImVec2 canvas_size = ImVec2(0, 0));
+  void DrawContextMenu();
+
+  bool DrawTilePainter(const Bitmap& bitmap, int size);
+  void DrawTileSelector(int size);
+
+  void DrawBitmap(const Bitmap& bitmap, int border_offset = 0,
+                  bool ready = true);
+  void DrawBitmap(const Bitmap& bitmap, int x_offset, int y_offset);
+  void DrawOutline(int x, int y, int w, int h);
+  void DrawRect(int x, int y, int w, int h, ImVec4 color);
+  void DrawText(std::string text, int x, int y);
+  void DrawGrid(float grid_step = 64.0f);
+  void DrawOverlay();  // last
+
+  auto Points() const { return points_; }
+  auto GetDrawList() const { return draw_list_; }
+  auto GetZeroPoint() const { return canvas_p0_; }
+  auto GetCurrentDrawnTilePosition() const { return drawn_tile_pos_; }
+  auto GetCanvasSize() const { return canvas_sz_; }
+  void SetCanvasSize(ImVec2 canvas_size) {
+    canvas_sz_ = canvas_size;
+    custom_canvas_size_ = true;
+  }
+
+ private:
+  bool enable_grid_ = true;
+  bool enable_context_menu_ = true;
+  bool custom_canvas_size_ = false;
+  bool is_hovered_ = false;
+
+  ImDrawList* draw_list_;
+  ImVector<ImVec2> points_;
+  ImVec2 scrolling_;
+  ImVec2 canvas_sz_;
+  ImVec2 canvas_p0_;
+  ImVec2 canvas_p1_;
+  ImVec2 mouse_pos_in_canvas_;
+  ImVec2 drawn_tile_pos_;
+
+  std::vector<app::gfx::Bitmap> changed_tiles_;
+  app::gfx::Bitmap current_tile_;
+
+  std::string title_;
+};
+
+}  // namespace gui
+}  // namespace yaze
+
+#endif