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|ID||Project||Category||View Status||Date Submitted||Last Update|
|0031237||Community||[OCCT] OCCT:Visualization||public||2019-12-12 09:09||2019-12-13 19:29|
|Target Version||Fixed in Version|
|Summary||0031237: Visualization - implement simple 2d gui on the AIS layer|
|Description||create a simple 2d gui on the ais layer, such as sprite. This sprite has position and area properties. When it is implemented, it has a callback function that responds to mouse events. is it possible?|
|Tags||No tags attached.|
|Test case number|
|Attached Files|| scribble.png (138,960 bytes) 2019-12-13 17:03|
Screen Shot 2019-12-14 at 00.11.35.png (51,178 bytes) 2019-12-13 19:29
|inspired by SDL2 gui layer.|
> cool! can I do something with this?
Draft within 0030952 creates some interactive OSD presentations within ViewerTest, so that it gives the idea of how such kind of things can be technically implemented on top of AIS.
The more comprehensive idea is:
- Define a new basic interface for this kind of 2D OSD objects (aka clickable).
- Provide reusable tools like sensitive entity to be useful for such kind of presentations.
- Implement a couple of presentations ("widgets") that can be used as building blocks for most common operations.
- Optionally introduce simplified signal-slot mechanism instead of callbacks for more flexible connections.
- Extend AIS_InteractiveContext / AIS_ViewController to redirect mouse movement / button press and release events on this kind of objects, so that more sophisticated logic can be implemented by widget.
Designing own widget hierarchy is not a simple but feasible task, and the main problem here is developing a minimal set of standard widgets enough for building simplified GUI. Things like buttons and text labels are trivial enough, flickable and clipped areas require extra efforts and implementing a comprehensive text input and managing input focus between widgets might be quite complicated.
I'm not sure it is worth developing a comprehensive GUI toolkit on top of AIS - there are a lot of GUI frameworks and it is clear that such task require quite an effort. But introducing some minimal blocks might be nice for cases, where complex GUI is not necessary, or portions of GUI are better connected to 3D objects.
edited on: 2019-12-13 17:09
some simple gui like https://inkscape.org/news/2018/11/11/graphics-math-library-2geoms-first-release-availab [^] , as you said which are better connected to 3d objects.
they implement the slider, text label.
I think we maybe need xyz-point input, slider
|2019-12-12 09:09||mahaidong||New Issue|
|2019-12-12 09:09||mahaidong||Assigned To||=> kgv|
|2019-12-12 09:10||mahaidong||Assigned To||kgv =>|
|2019-12-12 09:15||mahaidong||Note Added: 0089472|
|2019-12-12 10:35||kgv||Relationship added||related to 0030952|
|2019-12-13 13:10||kgv||Note Added: 0089495|
|2019-12-13 13:16||kgv||Summary||proposal: simple 2d gui on the AIS layer. => Visualization - implement simple 2d gui on the AIS layer|
|2019-12-13 17:03||mahaidong||File Added: scribble.png|
|2019-12-13 17:09||mahaidong||Note Added: 0089507|
|2019-12-13 17:09||mahaidong||Note Edited: 0089507||View Revisions|
|2019-12-13 17:12||mahaidong||Assigned To||=> mahaidong|
|2019-12-13 19:29||mahaidong||File Added: Screen Shot 2019-12-14 at 00.11.35.png|
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