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Develop allows you to edit existing Activities or create new ones. It allows the viewing and editing of multiple files and gives easy access to error logs. It includes templates for a number of sample Hello World Activities.

Develop open screen.jpeg

The main screen is shown below. In this case, a new Activity called testgtk2 has been created from the gtk2 "Hello World" template. The left pane shows the files and directories that comprise the Activity and the right pane shows the contents of its main file,

Screenshot of Develop testgtk2 .png

From left to right, the toolbar buttons have the following functions


  • the title of the project
  • edit the Journal description
  • sharing (disabled)
  • create a bundle, use the bundle to install your Activity on other laptops


  • copy
  • paste


Show source

  • the left hand pane shows the files and directories that comprise your Activity

Show file symbols

  • the left hand pane shows the classes, functions and variables in the file on the right

Show log files

  • shows the log files which contain error messages from running your Activity

Create an empty file

  • your Activity already comprises a number of files, this adds an additional empty file

Remove file

  • deletes the most recently viewed file, the one displayed in the right pane

Run activity

  • runs your activity


  • quits the Develop Activity

Tutorial - creating your Activity

Open Develop, start new


Create a new Activity

Select the type Gtk2

Name the Activity testgtk2


Press the Run activity button on the toolbar, your testgtk2 Activity will run, it prints Hello World!. (If you look at your Home screen you have a new Activity called testgtk2.)

Stop testgtk2 and return to Develop. Edit line 70 of, "Hello World!", change this text but be careful only to change the text within the quotation marks. Press the Run activity button, the Activity now displays the new text.

Changing the icon

Shown in the left hand pane is the directory activity with a triangle next to it pointing right. Click on it to see its contents, open activity-helloworld.svg

Line 11 defines the circle of the world in the icon. Change stroke-width to "6.5"


This video shows a very early version of Develop:

I don't know much about this activity but here's my over the shoulder view of the activity: --Dennis Daniels 17:33, 10 September 2009 (UTC)