CheckBox: Shopping list

[Scott Ferguson]

About: The checkbox allows the user to check an option which would indicate a yes/no true/false state.

This exercise lets you try out using checkboxes and sets the text in the title bar when the Eggs checkbox is changed for the first time.

Create a new project titled: lrn_cbx_shop 

Screen Designer:

Click on the Title bar and change the Title Property text to Shopping List

Drag out 3 checkboxes and change their Text Properties to Bread, Milk and Eggs.

Blocks Editor:

Drag out CheckBox3.Changed from the My Blocks, CheckBox3 group

 - this event block will execute any blocks inside it when it's box is changed from checked to unchecked or vice versa.

 - CheckBox3 has the text label 'Eggs' and we want to remind mom to get the cholesterol-free eggs

 - we want it to show the message 'Remember to get cholesterol-free! when the box is first checked

Drag out a set-Screen1.Title-to block from My Blocks, Screen1 and drop it inside CheckBox3.Changed

From the Built-In tab, text option, drag out a text-text block, snap it to Scrteen1.Title and change the text to 'Remember to get cholesterol-free!'

Now test your project with the emulator or attached android device.

 - the output should look like this:

END.

Challenge:

Can you have the other checkboxes display a message when they are first checked?