Changes, Changes and... Changes!

The code relatives to chart is finally ok..
Now the program is capable to:

• plot a chart with the data ordered by date
• put the correct label on the chart ticks
• put an explicative label on the axis
• calculate a good y-range for displaying the chart (see this option of pycha)
• for every click on one of the symbol on the stocks list, it display the last month of data on the chart.
• I added a reload button... if you want you can trash all your dowloaded data and download it again.

About pycha: this is the complete list of options and if you want to specify ticks labels, you need to give pycha something like this:


[
{'v': 0, 'label': 'day1'},
{'v': 1, 'label': 'day2'},
{'v': 2, 'label': 'day3'}
]


It is a list of dictionary.
so record 0 will have day 1 on the first tick.. and so on...


Tomorrow I will spend my after-work time, trying to put it on the ppa and making it ready for the ubuntuappshowdown!

Last screenshot here:

After that, I will spend my resting time for:

• finish about page.
• unity integration.
• make it possible to change data displayed on chart
• caching data (I want to reduce queries to yahoo whenever is possible).

I need also some graphics.. for icons at least.

Add functionality & autocomplete

I have added a textentry on the top of the dialog for add a new stock quote.
This textentry helps to find through the list of available company, with an autocomplete algorithm... while you type, the list change.
The Add, now it works!

In the main screen when you select one of the registered stock quote, the chart updates, but I have some problem displaying the chart..
I need to examine more later on this, I have a pycha error with some company and I have to understand if it is a problem with the loaded data or a pycha problem.

Latency
Every network operation is blocking the main thread.. so the UI freeze until the dowload of data from the yahoo finance complete: when you add a new stock, at startup and when chart updates.
A disaster! :D

This is a common UI problem and the solution, here, it is to use a secondary thread that manage the connection.
I have to search for which is the common solution on pygtk.. maybe there is a good way to do this, or a pattern to follow.

It is growing day by day!

I think the final name of the app will be UStockQuotes!

This is a screenshot of the last evolution of my app:

As you can see there is a list of stock quotes now.
This is the list of the stocks interested by the user.
At the moment the data is stored inside a database, the application fetch the list from the database and than fetch the updated data from yahoo service.

When you select one of the row of the table, the chart update itself retrieving the data.
 
So this is roadmap, just for the first part:
- add/remove stock quote.
- handle no-selected quote, no-stored-data (leaving a banner for example or a message), yahoo errors: means no plot.
- change chart period.
- change stock quote order in table.
- data caching mechanism for fast response and less requests.
- loading screen.
- better unity integration.
- ppa & preparation for contest.


Nice to have:
- Fullscreen mode.
- Fullscreen with stock quote data-rotation.