Page 83 - KEC Khaitan C5 Flipbook
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Blocks
                                                                                                         Button
                                                                                      Backpack

                      Built-in Blocks



                       Components                                       Workspace
                         Blocks



                                                                                          Trash


                 Following are the main parts of the Block Editor:
                   Built-in  Blocks:  It contains  all the  predefined  blocks  in the  application.  They are
                   responsible for handling operations like Math, Text, Logic and Control.
                   Component Blocks: It contains relevant blocks for the components we have added in

                   the Design window.
                   Workspace: It arranges all the blocks for coding in the workspace.

                   Trash: It is used for deleting blocks that are not required.
                   Backpack: It stores the copy of all the blocks even when we exit App Inventor.

                 Making Click Event for Button

                 To making click event for button, follow the given
                 steps:
                 Step  1   Click on the Talking_Me button.

                 Step  2   Drag  and drop  When  Talking_Me.Click
                           do block on the workspace.

                 This is an Event Handler block that will handle what
                 happens when the button on your  app is clicked.

                 Program the TextToSpeech Action

                 To program the TextToSpeech, follow the given steps:

                 Step  1   Click on the TextToSpeech1 block.
                 Step  2   Click and hold the call TextToSpeech1.
                           Speak message block.

                 Step  3   Drag the  block to  the Workspace  and
                           drop it onto  the block  labeled  when
                           Talking_Me.Click.

                 This block will execute when the button on our
                 app is clicked and make our phone speak.



                                                                                 Introduction to Mobile Apps and MIT  81
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