These days I am migrating one of my sites to a new platform and I needed to download some data from MySQL database. Host provider gave me cPanel access to my server, so I can go there and open phpMyAdmin page and from there to manually pick the tables and …
In the previous post, methods clone_node and indent_node were described. Next method we are going to describe is dedent_node or moving node left.
dedent_nodeMethod dedent_node(pos) moves node at the given position to left, i.e. to its grand-parent just after its current parent. This operation can change …
In the previous post, I have explained how delete_node works. Now, I am going to explain clone_node command. First let’s see picture of this operation.
Please note: we are continuing to modify outline from the previous post …
In the previous post, I have explained two basic helper classes LTMData and NData and gave you an example of a picture showing content of Leo model data for one example outline. In this part, I will use more pictures like that one. If you don’t understand what the …
The new Leo tree data model has been evolving during last few weeks. Some things has been changed since my last post. I guess now may be the right time to explain how it works and why it was designed the way it is.
But before I start to explain …
In the previous part I wrote about functions for loading LeoTreeModel from xml files as well as loading external files. Now, that we have loaded outline let’s add some functions for moving nodes around.
User will need to select node previous, next, left, right. LeoTreeModel has field …
In the previous part I wrote about implementation of LeoTreeModel class and its fields. First instances of LeoTreeModel were made from Leo’s VNode instances. Now let’s enable building LeoTreeModel directly from .leo xml files.
We already have function that builds LeoTreeModel based on …
What would Leo’s data model look like if I were to build it now? Leo has a long history and its current data model is the result of the evolution process. Many different ideas were combined and applied, and some of them were later abandoned. All these ideas left …
After little bit of polishing and cleaning, prototype code:
This is the second part of story about using functional programming for prototyping (first part is Here). Originally, my intention was to document whole process of prototyping. I wished not to finish prototype and then describe it after, but to show every step in my work-flow. However, soon after I …