MIT App Inventor - كتاب هندسة البرمجيات - الصف 12 - الفصل 1 - المملكة العربية السعودية

--- SECTION: Application Header --- MIT APP INVENTOR Projects Connect Build Settings Help My Projects View Trash Guide --- SECTION: Screen Header --- Visit_SA_App Cities Add Screen... Remove Screen Publish to Gallery --- SECTION: Blocks Palette (Top) --- Blocks Built-in Control Logic Math Text Lists Dictionaries Colors Variables Procedures Cities discover_label VerticalArrangement1 --- SECTION: Viewer Code Blocks (Top) --- Viewer set riyadh_list . BackgroundColor to riyadh_list . Elements set riyadh_list . Elements to set riyadh_list . ElementsFromString to riyadh_list . Enabled --- SECTION: Conditional Logic Block 1 --- if get start value = "en" then set riyadh_list . Elements to else if get start value = "ar" then set riyadh_list . Elements to --- SECTION: Application Header --- MIT APP INVENTOR Projects Connect Build Settings Help My Projects View Trash Guide --- SECTION: Screen Header --- Visit_SA_App Cities Add Screen... Remove Screen Publish to Gallery --- SECTION: Blocks Palette (Bottom) --- Blocks Built-in Control Logic Math Text Lists Dictionaries Colors Variables Procedures --- SECTION: Viewer Code Blocks (Bottom) --- Viewer initialize global name to get set to --- SECTION: Conditional Logic Block 2 --- if get start value = "en" then set riyadh_list . Elements to get global riyadh_highlights_en else if get start value = "ar" then set riyadh_list . Elements to get global riyadh_highlights_ar --- SECTION: Footer --- وزارة التعليم Ministry of Education 2023 - 1447 --- SECTION: Page Number --- 162 --- VISUAL CONTEXT --- **DIAGRAM**: MIT App Inventor Interface - List Picker Elements Description: A screenshot of the MIT App Inventor development environment. The top section shows the application header with navigation options (Projects, Connect, Build, Settings, Help, My Projects, View Trash, Guide) and the screen header (Visit_SA_App, Cities, Add Screen..., Remove Screen, Publish to Gallery). The left panel is labeled 'Blocks' and lists categories like Built-in, Control, Logic, Math, Text, Lists, Dictionaries, Colors, Variables, Procedures, Cities, discover_label, and VerticalArrangement1. The main 'Viewer' area displays several block-based code snippets. These include 'set riyadh_list . BackgroundColor to', 'riyadh_list . Elements', 'set riyadh_list . Elements to', 'set riyadh_list . ElementsFromString to', and 'riyadh_list . Enabled'. A blue dashed arrow with the number '6' points from the right side of the image to the 'set riyadh_list . Elements to' block, indicating a specific point of interest or instruction. X-axis: N/A Y-axis: N/A Data: N/A Key Values: Block 'set riyadh_list . Elements to' is highlighted by indicator 6. Context: Illustrates how to manipulate properties and elements of a list picker component (riyadh_list) in MIT App Inventor using block-based programming. The number 6 likely refers to a step or explanation in the accompanying text (not visible here). **DIAGRAM**: MIT App Inventor Interface - Global Variable Initialization and Conditional Logic Description: A second screenshot of the MIT App Inventor development environment, similar to the first. It also shows the application header and screen header. The left 'Blocks' panel is visible, listing categories. The 'Viewer' area displays block-based code for initializing a global variable: 'initialize global name to'. Below this, there are 'get' and 'set' blocks. A blue dashed arrow with the number '7' points from the right side of the image to the 'get' block. Below this screenshot, a separate block of conditional logic is shown: 'if get start value = "en" then set riyadh_list . Elements to get global riyadh_highlights_en else if get start value = "ar" then set riyadh_list . Elements to get global riyadh_highlights_ar'. X-axis: N/A Y-axis: N/A Data: N/A Key Values: Block 'get' is highlighted by indicator 7., Conditional logic checks 'start value' for 'en' or 'ar' to set 'riyadh_list . Elements' from 'global riyadh_highlights_en' or 'global riyadh_highlights_ar' respectively. Context: Demonstrates how to initialize global variables ('name') and use conditional logic to dynamically set the elements of a list picker ('riyadh_list') based on a 'start value', likely representing a language preference (English 'en' or Arabic 'ar'). The number 7 likely refers to a step or explanation in the accompanying text (not visible here).