1 // NasalCanvas.cxx -- expose Canvas classes to Nasal
3 // Written by James Turner, started 2012.
5 // Copyright (C) 2012 James Turner
7 // This program is free software; you can redistribute it and/or
8 // modify it under the terms of the GNU General Public License as
9 // published by the Free Software Foundation; either version 2 of the
10 // License, or (at your option) any later version.
12 // This program is distributed in the hope that it will be useful, but
13 // WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 // General Public License for more details.
17 // You should have received a copy of the GNU General Public License
18 // along with this program; if not, write to the Free Software
19 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
25 #include "NasalCanvas.hxx"
26 #include <Canvas/canvas_mgr.hxx>
27 #include <Main/globals.hxx>
28 #include <Scripting/NasalSys.hxx>
30 #include <osgGA/GUIEventAdapter>
32 #include <simgear/sg_inlines.h>
34 #include <simgear/canvas/Canvas.hxx>
35 #include <simgear/canvas/elements/CanvasElement.hxx>
36 #include <simgear/canvas/MouseEvent.hxx>
38 #include <simgear/nasal/cppbind/from_nasal.hxx>
39 #include <simgear/nasal/cppbind/to_nasal.hxx>
40 #include <simgear/nasal/cppbind/NasalHash.hxx>
41 #include <simgear/nasal/cppbind/Ghost.hxx>
43 extern naRef propNodeGhostCreate(naContext c, SGPropertyNode* n);
45 namespace sc = simgear::canvas;
47 template<class Element>
48 naRef elementGetNode(naContext c, Element& element)
50 return propNodeGhostCreate(c, element.getProps());
53 typedef nasal::Ghost<sc::EventPtr> NasalEvent;
54 typedef nasal::Ghost<sc::MouseEventPtr> NasalMouseEvent;
55 typedef nasal::Ghost<sc::CanvasPtr> NasalCanvas;
56 typedef nasal::Ghost<sc::ElementPtr> NasalElement;
57 typedef nasal::Ghost<sc::GroupPtr> NasalGroup;
60 typedef osg::ref_ptr<osgGA::GUIEventAdapter> GUIEventPtr;
62 class NasalCanvasEvent:
63 public NasalObject<GUIEventPtr, NasalCanvasEvent>
67 naRef getEventType(naContext c, const GUIEventPtr& event)
69 #define RET_EVENT_STR(type, str)\
70 case osgGA::GUIEventAdapter::type:\
71 return nasal::to_nasal(c, str);
73 switch( event->getEventType() )
75 RET_EVENT_STR(PUSH, "push");
76 RET_EVENT_STR(RELEASE, "release");
77 RET_EVENT_STR(DOUBLECLICK, "double-click");
78 RET_EVENT_STR(DRAG, "drag");
79 RET_EVENT_STR(MOVE, "move");
80 RET_EVENT_STR(SCROLL, "scroll");
81 RET_EVENT_STR(KEYUP, "key-up");
82 RET_EVENT_STR(KEYDOWN, "key-down");
93 SGPropertyNode& requireArg(naContext c, int argc, naRef* args, int index = 0)
96 naRuntimeError(c, "missing argument #%d", index);
98 SGPropertyNode* props = ghostToPropNode(args[index]);
100 naRuntimeError(c, "arg #%d: not a SGPropertyNode ghost");
105 CanvasMgr& requireCanvasMgr(naContext c)
107 CanvasMgr* canvas_mgr =
108 static_cast<CanvasMgr*>(globals->get_subsystem("Canvas"));
110 naRuntimeError(c, "Failed to get Canvas subsystem");
116 * Create new Canvas and get ghost for it.
118 static naRef f_createCanvas(naContext c, naRef me, int argc, naRef* args)
120 return NasalCanvas::create(c, requireCanvasMgr(c).createCanvas());
124 * Get ghost for existing Canvas.
126 static naRef f_getCanvas(naContext c, naRef me, int argc, naRef* args)
128 SGPropertyNode& props = requireArg(c, argc, args);
129 CanvasMgr& canvas_mgr = requireCanvasMgr(c);
131 sc::CanvasPtr canvas;
132 if( canvas_mgr.getPropertyRoot() == props.getParent() )
134 // get a canvas specified by its root node
135 canvas = canvas_mgr.getCanvas( props.getIndex() );
136 if( !canvas || canvas->getProps() != &props )
141 // get a canvas by name
142 if( props.hasValue("name") )
143 canvas = canvas_mgr.getCanvas( props.getStringValue("name") );
144 else if( props.hasValue("index") )
145 canvas = canvas_mgr.getCanvas( props.getIntValue("index") );
148 return NasalCanvas::create(c, canvas);
151 naRef f_canvasCreateGroup(sc::Canvas& canvas, const nasal::CallContext& ctx)
155 name = nasal::from_nasal<std::string>(ctx.c, ctx.args[0]);
157 return NasalGroup::create(ctx.c, canvas.createGroup(name));
160 naRef initNasalCanvas(naRef globals, naContext c, naRef gcSave)
162 NasalEvent::init("canvas.Event");
163 NasalMouseEvent::init("canvas.MouseEvent")
164 .bases<NasalEvent>();
165 NasalCanvas::init("Canvas")
166 .member("_node_ghost", &elementGetNode<sc::Canvas>)
167 .member("size_x", &sc::Canvas::getSizeX)
168 .member("size_y", &sc::Canvas::getSizeY)
169 .method_func<&f_canvasCreateGroup>("createGroup");
170 NasalElement::init("canvas.Element")
171 .member("_node_ghost", &elementGetNode<sc::Element>)
172 .method<&sc::Element::addEventListener>("addEventListener");
173 NasalGroup::init("canvas.Group")
174 .bases<NasalElement>();
176 nasal::Hash globals_module(globals, c),
177 canvas_module = globals_module.createHash("canvas");
179 canvas_module.set("_newCanvasGhost", f_createCanvas);
180 canvas_module.set("_getCanvasGhost", f_getCanvas);