refactored from main to canvas.h - basic functionality working

src/canvas.h

@@ -0,0 +1,56 @@
+#pragma once
+
+#include "draggable.h"
+#include "raymath.h"
+#include "state.h"
+namespace VISEQ::APP::CANVAS {
+	class Canvas : public BASE::Draggable {
+		public:
+			Canvas() {}
+
+			Camera2D camera;
+			Vec2Df camera_delta;
+
+			virtual bool hovering() override {
+				return true;	
+			}
+
+			virtual void drag() override {
+				if(state->mouse_right.down) {
+					camera.target = Vector2Add(camera.target, camera_delta);
+				}
+			}
+			
+			virtual void drawStart(){
+				BeginMode2D(camera);
+			}
+
+			virtual void drawEnd(){
+				EndMode2D();
+			}
+
+			virtual void draw(){
+				camera_delta = state->mouse_delta * (-1.0f/camera.zoom);
+				if(hovering()) drag();
+
+				float wheel = GetMouseWheelMove();
+				if(wheel != 0){
+					if(!IsKeyDown(KEY_LEFT_SHIFT) && !IsKeyDown(KEY_LEFT_CONTROL) && !IsKeyDown(KEY_LEFT_ALT)){
+						camera.offset = state->raw_mouse;
+						camera.target = state->screen_mouse;
+						float scaleFactor = 1.0f + (0.25f*fabsf(wheel));
+						if (wheel < 0) scaleFactor = 1.0f/scaleFactor;
+						camera.zoom = Clamp(camera.zoom*scaleFactor, 0.125f, 64.0f);
+					}
+				}
+
+				for(int x = -state->settings.grid*100; x < state->settings.grid*100; x+=state->settings.grid){
+					for(int y = -state->settings.grid*100; y < state->settings.grid*100; y+=state->settings.grid){
+						DrawPixel(x, y, (Color){130,130,130,200});
+					}
+				}
+			}
+	};
+}
+
+