Canvas widgets: Difference between revisions

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Canvas widgets (view source)

Revision as of 18:32, 9 May 2013

763 bytes removed ,  9 May 2013
→‎C++: done
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* '''Clipping''': For different reasons we will need to be able to clip some elements to certain regions. It should work with specifying either a clipping rectangle or by using a path. OpenVG seems to have support for it, although I haven't looked into it too deep. We also need to ensure that it also works with text. At least rectangular regions are needed.(eg. group/clip-min[0..1], group/clip-max[0..1]) {{Not done}}
* '''Clipping''': For different reasons we will need to be able to clip some elements to certain regions. It should work with specifying either a clipping rectangle or by using a path. OpenVG seems to have support for it, although I haven't looked into it too deep. We also need to ensure that it also works with text. At least rectangular regions are needed.(eg. group/clip-min[0..1], group/clip-max[0..1]) {{Not done}}
* '''Animations''': I don't know if we should do animations just by using interpolator and settimer from Nasal or if we should implement some time-based animations directly in C++. At least we need some helper functions (eg. for blinking elements -> cursor, fading, ...) It would also be possible to implement animations purely in Nasal space, e.g. by supporting a subset of SMIL for SVG, so that existing tools could be used to created animated vector images that are converted to canvas properties by the Nasal parser.
* '''Animations''': I don't know if we should do animations just by using interpolator and settimer from Nasal or if we should implement some time-based animations directly in C++. At least we need some helper functions (eg. for blinking elements -> cursor, fading, ...) It would also be possible to implement animations purely in Nasal space, e.g. by supporting a subset of SMIL for SVG, so that existing tools could be used to created animated vector images that are converted to canvas properties by the Nasal parser.
** '''James''': "copy/paste, text selection. Do you think you'd be able to handle a blinking insertion point and a standard draggable text selection area in this approach? Obviously it might need some additional C++ helpers but that's okay since text-editing is a pretty specialised behaviour." (work in progress as of 07/2012)
** '''Hooray''': "Regarding the blinking cursor, that could obviously be implemented as a Nasal-animated svg image that is changed periodically using a timer - i.e. by showing/hiding the group element with the cursor image"
** '''Hooray''': "On the other hand, one could just as well use your canvas "groups" to support alternating/flashing contents using a new flag - sort of like a GIF image with delays between each image element."
* Check what is missing to implement the different hardcoded instruments.{{Not done}}
* Check what is missing to implement the different hardcoded instruments.{{Not done}}
* provide Nasal hooks to access: taxiways, <del><parking positions</del> etc
* provide Nasal hooks to access: taxiways, <del><parking positions</del> etc
Retrieved from "https://wiki.flightgear.org/Special:MobileDiff/60060"

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