[Qt-components] Ubuntu UI toolkit - Clipboard access
Aaron J. Seigo
aseigo at kde.org
Wed Jan 23 11:09:30 CET 2013
On Wednesday, January 23, 2013 10:06:59 Zsombor Egri wrote:
> Here's an API we are proposing for accessing the system clipboard from
> QML and to filter its content before being copied into a TextField/TextArea.
proposing to be added to Qt's QML API? (that seems the best place for such a
thing)
> The API consists of an object, a data transfer type and a filter element.
>
> The global object is based on (and uses) QClipboard functionality:
>
> *clipboard* {
> function *clear*() - to clear the clipboard content
> function *setData*(string mimeType, var data) - pushes data to the
> clipboard
> function MimeData *data*() - retrieves the clipboard data
> }
i'm not a fan of global objects in the least. much nicer to instantiate items
that are actually needed. otherwise, we end up with a growing pile of objects
of limited value in many use cases.
also, why functions instead of a data property? an object with mimeType and
data properties could be assigned/retrieved from it. setting an invalid object
would be a no-op.
it also makes clear unnecessary: just set data to be an empty / invalid
MimeData object.
> The MimeData type provides access to the clipboard data itself; all
> properties are read-only.
>
> *MimeData* {
> readonly property list<string> *types* - contains the available
> types in the clipboard
> readonly property string *text* - text data or undefined if no text
> data in clipboard
> readonly property string *html* - HTML data or undefined
> readonly property list<url> *urls* - list or URLs or undefined
> readonly property color *color* - color data or undefined
>
> function var *mimeData*(string type) - returns data corresponding to
> the MIME type
> }
why not a single variant property?
why a function to return the mimeData? this is going to be implemented in C++
i imagine anyways, so a property that is retrieved via a C++ function seems
normal. it can be set to read-only.
> And finally the clipboard filter element, which is meant to capture
> clipboard changes aswell as to grab clipboard key shortcuts from a
> TextField or TextArea so data can be filtered before pasting it into the
> text inputs.
this feels like something that would make sense as part of MimeData above,
perhaps?
also, what sort of filtering do you forsee being done?
--
Aaron J. Seigo
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