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From Stephan Huber, "attached you'll find a first version of multi-touch-support for OS X (>=

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10.6), which will forward all multi-touch events from a trackpad to the
corresponding osgGA-event-structures.

The support is switched off per default, but you can enable multi-touch
support via a new flag for GraphicsWindowCocoa::WindowData or directly
via the GraphicsWindowCocoa-class.

After switching multi-touch-support on, all mouse-events from the
trackpad get ignored, otherwise you'll have multiple events for the same
pointer which is very confusing (as the trackpad reports absolute
movement, and as a mouse relative movement).

I think this is not a problem, as multi-touch-input is a completely
different beast as a mouse, so you'll have to code your own
event-handlers anyway.

While coding this stuff, I asked myself if we should refactor
GUIEventAdapter/EventQueue and assign a specific event-type for
touch-input instead of using PUSH/DRAG/RELEASE. This will make it
clearer how to use the code, but will break the mouse-emulation for the
first touch-point and with that all existing manipulators. What do you
think? I am happy to code the proposed changes.

Additionally I created a small (and ugly) example osgmultitouch which
makes use of the osgGA::MultiTouchTrackballManipulator, shows all
touch-points on a HUD and demonstrates how to get the touchpoints from
an osgGA::GUIEventAdapter.

There's even a small example video here: http://vimeo.com/31611842"
This commit is contained in:
Robert Osfield
2012-02-03 14:25:08 +00:00
parent e5a16de7d4
commit 85bce8b8ad
6 changed files with 346 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
include/osgViewer/api/Cocoa/GraphicsWindowCocoa
View File

@@ -60,7 +60,12 @@ class GraphicsWindowCocoa : public osgViewer::GraphicsWindow, public osgViewer::
_checkForEvents(true),
_ownsWindow(true),
_currentCursor(RightArrowCursor),
_window(NULL)
_window(NULL),
_view(NULL),
_context(NULL),
_pixelformat(NULL),
_updateContext(false),
_multiTouchEnabled(false)
{
_traits = traits;
@@ -134,11 +139,12 @@ class GraphicsWindowCocoa : public osgViewer::GraphicsWindow, public osgViewer::
class WindowData : public osg::Referenced
{
public:
enum Options { CreateOnlyView = 1, CheckForEvents = 2, PoseAsStandaloneApp = 4};
enum Options { CreateOnlyView = 1, CheckForEvents = 2, PoseAsStandaloneApp = 4, EnableMultiTouch = 8};
WindowData(unsigned int options)
: _createOnlyView(options & CreateOnlyView),
: _createOnlyView(options & CreateOnlyView),
_checkForEvents(options & CheckForEvents),
_poseAsStandaloneApp(options & PoseAsStandaloneApp),
_multiTouchEnabled(options & EnableMultiTouch),
_view(NULL)
{
}
@@ -147,12 +153,13 @@ class GraphicsWindowCocoa : public osgViewer::GraphicsWindow, public osgViewer::
bool createOnlyView() const { return _createOnlyView; }
bool checkForEvents() const { return _checkForEvents; }
bool poseAsStandaloneApp() const { return _poseAsStandaloneApp; }
bool isMultiTouchEnabled() const { return _multiTouchEnabled; }
protected:
inline void setCreatedNSView(NSView* view) { _view = view; }
private:
bool _createOnlyView, _checkForEvents, _poseAsStandaloneApp;
bool _createOnlyView, _checkForEvents, _poseAsStandaloneApp, _multiTouchEnabled;
NSView* _view;
friend class GraphicsWindowCocoa;
@@ -168,6 +175,9 @@ class GraphicsWindowCocoa : public osgViewer::GraphicsWindow, public osgViewer::
/** adapts a resize / move of the window, coords in global screen space */
void adaptResize(int x, int y, int w, int h);
bool isMultiTouchEnabled();
void setMultiTouchEnabled(bool b);
protected:
void init();
@@ -195,7 +205,7 @@ class GraphicsWindowCocoa : public osgViewer::GraphicsWindow, public osgViewer::
GraphicsWindowCocoaGLView* _view;
NSOpenGLContext* _context;
NSOpenGLPixelFormat* _pixelformat;
bool _updateContext;
bool _updateContext, _multiTouchEnabled;
};
}