Tikzpicture visual editor

Question

I am drawing tables such as this one:

\begin{figure}[H]
\centering
\begin{tikzpicture}[xscale=1.5]
\node at (3,-1.5) { text1 };
\node at (1,-3.5) { text2 };
\node at (-0.2,-0.1) {  };
\node at (-0.2,-0.85) {  };
\node at (-0.2,-1.85) {  };
\node at (-0.2,-2.85) { more text };
\node at (-0.2,-3.85) {  };
\node at (-0.2,-4.85) {  };
\node at (0.15,0.2) {  };
\node at (0.85,0.2) { };
\node at (1.85,0.2) { more text };
\node at (1.85,-2.85) { more text };
\node at (3.85,0.2) { };
\draw (0,0) -- (0,-5);
\draw (0,-5) -- (4,-5);
\draw (4,-5) -- (4,0);
\draw (0,0) -- (4,0);
\draw (0,0) -- (0,-1);
\draw (0,-1) -- (1,-1);
\draw (1,-1) -- (1,-2);
\draw (1,-2) -- (2,-2);
\draw (2,-2) -- (2,-3);
\draw (2,-3) -- (3,-3);
\draw (3,-3) -- (3,-4);
\draw (3,-4) -- (4,-4);
\draw (4,-4) -- (4,-5);
\end{tikzpicture}
\end{figure}

Now I even want to make rows and columns and shadow certain parts of the resulting grid.

I was wondering if there is some tool that allows me to do this visually and gives me the tikzpicture code back. I used this one for graphs but it does not seem to support tikzpicture.