Picture Preview
From Openmoko
| Not implemented: This article or section documents one or more features that are not implemented and which may never be implemented. |
Contents |
Overview
The Picture Preview Widget provides a thumbnail preview of an image
Usage Cases
- Commonly used in the Details Area of Native Stylus-Based applications.
Appearance & Interaction
OS X's preview function in SpotLight is a good reference:
http://people.openmoko.org/sean/specifications/images/osx_picturepreview.png
On Tap
http://people.openmoko.org/sean/specifications/images/osx_picturepreview_select.png
- Select, if not selected
- Expand, if selected and collapsed
- Collapse, if selected and expanded
On Tap with Hold
- Popup Menu is opened with the following structure:
| Item | Action | Constraints |
|---|---|---|
| Select | Selects this row | |
| Open with associated application | Opens this item with registered application | Grayed-out if no applicaiton is registered. |
Constraints
(TBD)
Architectural Details
(TBD)
Implementation Recommendations
- Use libexif to read headers from jpeg files.
Cross-Widget Interactions
- Usually contains a number of Field Widgets
Unresolved Issues
- Q: Should we try to read all the image header fields? If yes, hopefully we can find a good library for this parsing :-)
- A: There's a libexif that could do it, but we should restrict ourselves to only a small and limited number of fields otherwise the preview item just gets too large in expanded mode. If a user wants full details, then use the dedicated Picture Viewer
Questions and Answers
(None)
