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Canvas widgets: Difference between revisions
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→Multiplatform Clipboard Support (native Copy/Paste) {{Pending}}
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The values are only valid for one single window (coordinates are relative to window origin). | The values are only valid for one single window (coordinates are relative to window origin). | ||
=== Keyboard Handling === | |||
James was definitely right regarding osgGA: UI processing is really simplified compared to PUI. | |||
Looking at the mouse handling code, the same technique we use for mouse handling could obviously also be used for keyboard handling: | |||
* http://www.openscenegraph.org/documentation/NPSTutorials/osgKeyboardInput.htm | |||
* http://www.openscenegraph.org/projects/osg/wiki/Support/Tutorials/BasicKeyboardInput | |||
So it just involves checking for osgGA::GUIEventAdapter::KEYDOWN and propagating the events to a handful of child properties for each canvas element that subscribed to keyboard events. | |||
It'd make sense to also use a boolean property to enable/disable reception of keyboard events, that will allow us to set the "focus" of windows and widgets. And then we only need to expose some keyboard-specific events like key-up, key-down, key-value etc at the C++ level, which all boils down to just calling fgSet*Value(). | |||
The rest will be handled at the Nasal level, so that users can register their own listeners. | |||
The nice thing is that once this is properly implemented, we'll already have a unified I/O handling system for GUIs, instruments, HUDs etc. and it moves all the implementation details to the base package again. | |||
BTW: There is already a property to toggle the mouse cursor via setprop, so this could also be wrapped in gui.nas, obviously being able to use a canvas texture as the cursor would prove the point that "everything is a canvas" in the design. | |||
=== Multiplatform Clipboard Support (native Copy/Paste) {{Pending}} === | === Multiplatform Clipboard Support (native Copy/Paste) {{Pending}} === | ||
{{Progressbar|60}} | {{Progressbar|60}} | ||