Добавлять объекты в родителя

src/toolbar/Tool.zig

@@ -1,9 +1,16 @@
 const Point2_f = @import("../models/basic_models.zig").Point2_f;
 const Canvas = @import("../Canvas.zig");
+const Document = @import("../models/Document.zig");
 
 pub const ToolContext = struct {
     canvas: *Canvas,
     document_point: Point2_f,
+    selected_object_id: ?u64,
+
+    pub fn addObject(self: *const ToolContext, template: Document.Object) !void {
+        try self.canvas.document.addObjectUnderParentId(self.selected_object_id, template);
+        self.canvas.requestRedraw();
+    }
 };
 
 pub const Tool = struct {