واجهة برمجة الكتل في MIT App Inventor - كتاب هندسة البرمجيات - الصف 12 - الفصل 1 - المملكة العربية السعودية

--- SECTION: Application Header and Menu --- MIT APP INVENTOR Projects Connect Build Settings Help Visit_SA_App AlMasmak Add Screen Remove Screen Publish to Gallery --- SECTION: Blocks Palette Header --- Blocks --- SECTION: Blocks Palette Components and Categories --- Math Text Lists Dictionaries Colors Variables Procedures AlMasmak discover_label VerticalArrangement1 title_label image description_label HorizontalArrangement map_button Map1 Any component --- SECTION: Viewer Pane Header --- Viewer --- SECTION: Map Button Event Handlers (Screenshot 1) --- when map_button .Click do when map_button .GotFocus do when map_button .LongClick do when map_button .LostFocus do when map_button .Click do --- SECTION: Map Component Operations (Screenshot 2) --- latitude longitude zoom call Map1 .Save path Map1 .BoundingBox set Map1 .BoundingBox to set Map1 .CenterFromString to Map1 .EnablePan when map_button .Click do set Map1 .CenterFromString to get global coordinates وزارة التعليم Ministry of Education 2023 - 1447 176 --- VISUAL CONTEXT --- **DIAGRAM**: MIT App Inventor Blocks Editor - Event Handlers Description: A screenshot of the MIT App Inventor Blocks editor, showing the 'Blocks' palette on the left and the 'Viewer' area on the right. The viewer displays several event handler blocks for a 'map_button' component: 'when map_button .Click do', 'when map_button .GotFocus do', 'when map_button .LongClick do', and 'when map_button .LostFocus do'. An arrow labeled '3' points from the 'when map_button .Click do' block in the main viewer to an identical, disconnected block on the far right, suggesting a specific focus or a copy of the block. Key Values: map_button .Click, map_button .GotFocus, map_button .LongClick, map_button .LostFocus Context: Illustrates how to define event-driven behavior for a button component in MIT App Inventor, specifically showing click, focus, long click, and lost focus events. **DIAGRAM**: MIT App Inventor Blocks Editor - Map Component Operations Description: A screenshot of the MIT App Inventor Blocks editor, showing the 'Blocks' palette on the left (scrolled down to reveal 'Any component') and the 'Viewer' area on the right. The viewer displays blocks related to map properties and actions, including 'latitude', 'longitude', 'zoom', 'call Map1 .Save path', 'Map1 .BoundingBox', 'set Map1 .BoundingBox to', 'set Map1 .CenterFromString to', and 'Map1 .EnablePan'. An arrow labeled '4' points from the 'set Map1 .CenterFromString to' block in the main viewer to a disconnected 'when map_button .Click do' block at the bottom, which contains 'do set Map1 .CenterFromString to get global coordinates'. This highlights how to set the map's center based on global coordinates when the map button is clicked. Key Values: latitude, longitude, zoom, Map1 .Save path, Map1 .BoundingBox, Map1 .CenterFromString, Map1 .EnablePan, global coordinates Context: Demonstrates various blocks for interacting with a Map component, including saving the map, setting its bounding box, and centering it from a string or global coordinates, often triggered by a button click.