Added all canvas component classes

src/CanvasComponents/CanvasComponent.cpp

@@ -0,0 +1,27 @@
+#include "CanvasComponent.hpp"
+#include "BrushStrokeCanvasComponent.hpp"
+#include "ImageCanvasComponent.hpp"
+#include "EllipseCanvasComponent.hpp"
+#include "RectangleCanvasComponent.hpp"
+#include "TextBoxCanvasComponent.hpp"
+
+void CanvasComponent::update(DrawingProgram& drawP) {
+}
+
+CanvasComponent* CanvasComponent::allocate_comp(CanvasComponent::CompType type) {
+    switch(type) {
+        case CanvasComponent::CompType::BRUSHSTROKE:
+            return new BrushStrokeCanvasComponent;
+        case CanvasComponent::CompType::RECTANGLE:
+            return new RectangleCanvasComponent;
+        case CanvasComponent::CompType::ELLIPSE:
+            return new EllipseCanvasComponent;
+        case CanvasComponent::CompType::TEXTBOX:
+            return new TextBoxCanvasComponent;
+        case CanvasComponent::CompType::IMAGE:
+            return new ImageCanvasComponent;
+    }
+    return nullptr;
+}
+
+CanvasComponent::~CanvasComponent() {}