PLTW App Creators

The visual part of a computer app or operating system, through which an end user interacts with the computing device or software.

• User Interface (UI)

• View Layer

• Controller Layer

The layer of an app that the user sees and interacts with.

• View Layer

• Controller Layer

• Event

The layer of an app that contains the program that tells the app how to behave.

• Event

• View Layer

• Controller Layer

An action or occurrence that happens during runtime that will trigger a response or behavior by the software. Examples of events include user-initiated events, such as clicking a button, or external events, such as the device receiving an SMS text message

• Event

• Abstraction

• Runtime

The period when a program is running. Runtime begins when a program is opened (or executed) and ends when the program is closed.

• Runtime

• Event

• Event Handler

Type of computer programming where the program responds to an input (or trigger).

• Event

• Event Driven Programming

• User Interface (UI)

A block of code that is triggered when a certain event happens.

• Event Handler

• Runtime

• Algorithm

In a program, an event that is triggered by user interaction with the user interface.

• User initiated Event

• Event Handler

• Abstraction

The process of reducing complexity by hiding unnecessary details to make it easier to think about a problem.

• Abstraction

• Algorithm

• Flowchart

An ordered set of instructions that are used to carry out a task.

• Algorithm

• Abstraction

• Program