Touch Display List Scrolling with Fixed Selection Anchor
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing information processing systems face challenges in displaying and managing multiple list items within a limited display area, particularly when scrolling, as users find it inconvenient to check selected items while navigating through numerous options.
Innovation Solution
An information processing apparatus with a touch panel display unit and operation reception unit that allows users to scroll through list items while keeping a selected item fixed at the end of the display area, adjusting the size of the fixed item and scrolling area based on user instructions and predetermined conditions to optimize visibility and usability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple list items are displayed in a limited display area, then the quantity of information displayed increases, but the visibility of selected items deteriorates when scrolling through the list
Solution Approach 1:
The display area is segmented into a scrollable region and a fixed region. The fixed region displays the selected list item separately from the scrolling list, ensuring it remains visible while other items scroll. This spatial segmentation resolves the contradiction by allowing both multiple items to be displayed and the selected item to remain visible simultaneously.
Solution Approach 2:
The selected list item is moved to a different dimensional space (fixed region outside the scrollable area) rather than trying to keep it within the scrolling dimension. This allows the selected item to be displayed in parallel with the scrolling list, maintaining visibility while enabling scrolling of other items.
2Quantity of substance
If the display area is used to show more list items, then the information density increases, but the ease of operation deteriorates as users must scroll more to find selected items
Solution Approach 1:
By segmenting the display into scrollable and fixed regions, the selected item is always accessible in the fixed region without requiring scrolling operations. This maintains ease of operation while increasing the number of items that can be displayed in the scrollable region.
3Loss of information
If the fixed item occupies more display area, then the visibility of the selected item improves, but the area available for scrolling other items decreases
Solution Approach 1:
The selected item is placed in a separate dimensional space (fixed region) adjacent to the scrollable region. This allows the fixed item to occupy display area without reducing the scrollable area, as they exist in parallel spatial dimensions rather than competing for the same space.
Data Source
AI summary
An information processing apparatus includes a display unit that has a touch panel function, an operation reception unit that receives a user instruction based on a touch operation performed on the display unit, and a display control unit that, when plural list items are displayed in a display area of the display unit, controls the display unit such that, if the operation reception unit receives an instruction to scroll through the plural list items, the plural list items are scrolled in the display area and, if a user selects a certain list item from the plural list items, the selected certain list item is fixed at an end of the display area in a scrolling direction.