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Story
Magnolia should let me navigate and browse lists grids (see Definition of terms#listterms#grid) easily by using either a mouse, a keyboard and using touch gestures.
Description of desired behaviour
A list grid can be navigated by using the keyboard's arrow keys (UP, RIGHT, LEFT and DOWN). The list grid shall load additional, previously invisible items on demand to ensure good performance even with large tree structures. A visual indicator shows if data is being loaded dynamically.
Likewise, a list grid may be navigated by using the mouse and the scrollbar. As is the case with keyboard navigation, a clear visual indicator appears if previously hidden items are being loaded and disappears once they become visible.
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Note that all scrolling operations should be smooth and not jumpy to avoid loosing sense of where in the list grid you currently are. Note that list grid shall only scroll up and down. We don't plan to support left and right scrolling for listsgrids, since this is a feature often not noticed by users.
Open and close folder items
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The difficulty with folder items in lists grids in Magnolia is that they are actual items, which can also be edited. Since the two primary gestures of mouse and touch are already used to select an item (see Focusing, selecting and opening items#Select a single item) and to open it for editing or inspection (see Focusing, selecting and opening items#Open an item for editing or further inspection), opening a folder item requires using a modifier key for keyboard and mouse input, or the usage of a taskbar toolbar or context menu. |
Since opening a folder item in a list grid view can't be done using an intuitive manner easily, Magnolia supports several options. Please refer to the Commands overview in the usage summary for a comprehensive list of navigation commands.
On opening a folder item, the content of the list grid view is then replaced by the list of items contained in the folder item. If data about items has to be loaded first, the list grid view is replaced by a visual indicator asking the user for patience. To return to the parent item of a currently shown sub list grid of items, the list grid view provides an "up" button - clicking or tapping it returns you to the list grid view containing the parent folder item.
A list grid is not a very convenient way to quickly navigate a hierarchical set of items, but has the advantage of visualising the type of a file or even showing thumbnail previews of an item's content.
Optional behaviour
Magnolia should offer an index next to the scrollbar for large, sorted lists grids similar to what can be seen on touch devices to allow to quickly jump to a certain position of the listgrid.
Magnolia could offer inertial scrolling as seen of today's touch devices to allow users to quickly navigate large data sets without loosing track of where they are. This would be especially useful on said touch devices, but may actually be a function required to be offered by the browser.
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Illustrations
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The illustrations mainly show which UI elements have to be present in order for the navigation of grids to work. They are presented isolated here, without the context they usually appear in. In the actual mockups e.g. for AdminCentral, some of these elements are actually placed in sidebars, others may remain in the toolbar. |
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