[[Property:title|Tutorial Step 7]]
[[Property:weight|6]]
[[Property:uuid|751a492d-6902-838e-7468-38b67e40f4e2]]
This sample builds on tutorial [[Tutorial Step 6|step 6]] , and also demonstrates the use of a [[ref:libraries/wel/reference/wel_menu_chart|WEL_MENU]] . The output is shown below: 

[[Image:step7|step7]]  <br/>
<br/>

==Compiling==

* Launch EiffelStudio. 
* Click '''Add project'''
* Browse to ''$ISE_EIFFEL\examples\wel\tutorial\step7\''. 
* Choose ''tutorial_step7.ecf''
* Choose the location where the project will be compiled, by default the same directory containing the configuration file. 
* Click '''OK'''. 


==Running==

After launching the sample, you will see a [[ref:libraries/wel/reference/wel_frame_window_chart|WEL_FRAME_WINDOW]]  displayed. By holding down the left mouse button, and moving the mouse (Within the client area of the window), you will be able to draw on the client are of the window. Selecting "Line_thickness" from the "Line" menu, will bring up a [[ref:libraries/wel/reference/wel_modal_dialog_chart|WEL_MODAL_DIALOG]]  which allows you to change the thickness of the line that is drawn. If you select "Exit" from the "File" menu, you will be prompted if you wish to exit the application. Selecting "New" from the "File" menu will clear the window. The other menu options on the "File" menu do nothing in this example. 

==Under the Hood==

During the creation of <code>MAIN_WINDOW</code>, the menu is assigned to the window and <code>on_menu_command</code> is redefined to allow processing of the menu selections. 

This sample contains the following classes: 
* <code>TUTORIAL_STEP7</code>
* <code>MAIN_WINDOW</code>
* <code>LINE_THICKNESS_DIALOG_CHART</code>
* <code>APPLICATION_IDS</code>
* <code>POINT</code>
* <code>LINE</code>