1 // Canvas gui/dialog manager
3 // Copyright (C) 2012 Thomas Geymayer <tomgey@gmail.com>
5 // This program is free software; you can redistribute it and/or
6 // modify it under the terms of the GNU General Public License as
7 // published by the Free Software Foundation; either version 2 of the
8 // License, or (at your option) any later version.
10 // This program is distributed in the hope that it will be useful, but
11 // WITHOUT ANY WARRANTY; without even the implied warranty of
12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 // General Public License for more details.
15 // You should have received a copy of the GNU General Public License
16 // along with this program; if not, write to the Free Software
17 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
19 #include "gui_mgr.hxx"
20 #include <Canvas/window.hxx>
22 #include <Main/fg_props.hxx>
23 #include <Main/globals.hxx>
24 #include <Viewer/CameraGroup.hxx>
25 #include <Viewer/renderer.hxx>
27 #include <simgear/canvas/Canvas.hxx>
28 #include <simgear/canvas/CanvasPlacement.hxx>
30 #include <osg/BlendFunc>
31 #include <osgViewer/Viewer>
32 #include <osgGA/GUIEventHandler>
34 #include <boost/bind.hpp>
39 class GUIEventHandler:
40 public osgGA::GUIEventHandler
43 GUIEventHandler(GUIMgr* gui_mgr):
47 bool handle( const osgGA::GUIEventAdapter& ea,
48 osgGA::GUIActionAdapter& aa,
52 return _gui_mgr->handleEvent(ea);
60 * Track a canvas placement on a window
62 class WindowPlacement:
63 public simgear::canvas::Placement
66 WindowPlacement( canvas::WindowPtr window,
67 simgear::canvas::CanvasPtr canvas ):
73 * Remove placement from window
75 virtual ~WindowPlacement()
77 canvas::WindowPtr window = _window.lock();
78 simgear::canvas::CanvasPtr canvas = _canvas.lock();
80 if( window && canvas && canvas == window->getCanvas().lock() )
81 window->setCanvas( simgear::canvas::CanvasPtr() );
85 canvas::WindowWeakPtr _window;
86 simgear::canvas::CanvasWeakPtr _canvas;
90 * Store pointer to window as user data
93 public osg::Referenced
96 canvas::WindowWeakPtr window;
97 WindowUserData(canvas::WindowPtr window):
102 //------------------------------------------------------------------------------
103 typedef boost::shared_ptr<canvas::Window> WindowPtr;
104 WindowPtr windowFactory(SGPropertyNode* node)
106 return WindowPtr(new canvas::Window(node));
109 //------------------------------------------------------------------------------
111 PropertyBasedMgr( fgGetNode("/sim/gui/canvas", true),
114 _event_handler( new GUIEventHandler(this) ),
115 _transform( new osg::MatrixTransform ),
116 _width(_props, "size[0]"),
117 _height(_props, "size[1]")
119 _width = _height = -1;
121 osg::Camera* camera =
122 flightgear::getGUICamera( flightgear::CameraGroup::getDefault() );
124 camera->addChild(_transform);
126 osg::Viewport* vp = camera->getViewport();
127 handleResize(vp->x(), vp->y(), vp->width(), vp->height());
129 simgear::canvas::Canvas::addPlacementFactory
132 boost::bind(&GUIMgr::addPlacement, this, _1, _2)
135 osg::StateSet* stateSet = _transform->getOrCreateStateSet();
136 stateSet->setDataVariance(osg::Object::STATIC);
137 stateSet->setRenderBinDetails(1000, "RenderBin");
139 // speed optimization?
140 stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
141 stateSet->setAttribute(new osg::BlendFunc(
142 osg::BlendFunc::SRC_ALPHA,
143 osg::BlendFunc::ONE_MINUS_SRC_ALPHA)
145 stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
146 stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
147 stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
148 stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
151 //------------------------------------------------------------------------------
154 PropertyBasedMgr::init();
156 globals->get_renderer()
158 ->addEventHandler( _event_handler );
161 //------------------------------------------------------------------------------
162 void GUIMgr::shutdown()
164 PropertyBasedMgr::shutdown();
166 globals->get_renderer()
168 ->removeEventHandler( _event_handler );
171 //------------------------------------------------------------------------------
172 void GUIMgr::elementCreated(simgear::PropertyBasedElementPtr element)
174 canvas::WindowPtr window =
175 boost::static_pointer_cast<canvas::Window>(element);
177 size_t layer_index = std::max(0, window->getProps()->getIntValue("layer", 1));
178 osg::Group *layer = 0;
180 if( layer_index < _transform->getNumChildren() )
182 layer = _transform->getChild(layer_index)->asGroup();
187 while( _transform->getNumChildren() <= layer_index )
189 layer = new osg::Group;
190 _transform->addChild(layer);
193 window->getGroup()->setUserData(new WindowUserData(window));
194 layer->addChild(window->getGroup());
197 //------------------------------------------------------------------------------
198 bool GUIMgr::handleEvent(const osgGA::GUIEventAdapter& ea)
200 switch( ea.getEventType() )
202 case osgGA::GUIEventAdapter::PUSH:
203 case osgGA::GUIEventAdapter::RELEASE:
204 // case osgGA::GUIEventAdapter::DOUBLECLICK:
205 // // DOUBLECLICK doesn't seem to be triggered...
206 case osgGA::GUIEventAdapter::DRAG:
207 case osgGA::GUIEventAdapter::MOVE:
208 case osgGA::GUIEventAdapter::SCROLL:
209 return handleMouse(ea);
210 // case osgGA::GUIEventAdapter::MOVE:
211 // std::cout << "MOVE" << std::endl;
213 case osgGA::GUIEventAdapter::RESIZE:
214 handleResize( ea.getWindowX(),
217 ea.getWindowHeight() );
224 //------------------------------------------------------------------------------
225 canvas::WindowPtr GUIMgr::getWindow(size_t i)
227 return boost::static_pointer_cast<canvas::Window>(_elements[i]);
230 //------------------------------------------------------------------------------
231 simgear::canvas::Placements
232 GUIMgr::addPlacement( const SGPropertyNode* node,
233 simgear::canvas::CanvasPtr canvas )
235 int placement_index = node->getIntValue("index", -1);
237 simgear::canvas::Placements placements;
238 for( size_t i = 0; i < _elements.size(); ++i )
240 if( placement_index >= 0 && static_cast<int>(i) != placement_index )
243 canvas::WindowPtr window = getWindow(i);
247 window->setCanvas(canvas);
248 placements.push_back(
249 simgear::canvas::PlacementPtr(new WindowPlacement(window, canvas))
255 //------------------------------------------------------------------------------
256 bool GUIMgr::handleMouse(const osgGA::GUIEventAdapter& ea)
258 if( !_transform->getNumChildren() )
261 simgear::canvas::MouseEvent event( ea.getEventType() );
263 event.x = 0.5 * (ea.getXnormalized() + 1) * _width + 0.5;
264 event.y = 0.5 * (ea.getYnormalized() + 1) * _height + 0.5;
265 if( ea.getMouseYOrientation()
266 != osgGA::GUIEventAdapter::Y_INCREASING_DOWNWARDS )
267 event.y = _height - event.y;
269 event.button = ea.getButton();
270 event.state = ea.getButtonMask();
271 event.mod = ea.getModKeyMask();
272 event.scroll = ea.getScrollingMotion();
274 canvas::WindowPtr window_at_cursor;
275 for( int i = _transform->getNumChildren() - 1; i >= 0; --i )
277 osg::Group *layer = _transform->getChild(i)->asGroup();
279 if( !layer->getNumChildren() )
282 for( int j = layer->getNumChildren() - 1; j >= 0; --j )
284 assert(layer->getChild(j)->getUserData());
285 canvas::WindowPtr window =
286 static_cast<WindowUserData*>(layer->getChild(j)->getUserData())
288 if( window->getRegion().contains(event.x, event.y) )
290 window_at_cursor = window;
295 if( window_at_cursor )
299 canvas::WindowPtr target_window = window_at_cursor;
300 switch( ea.getEventType() )
302 case osgGA::GUIEventAdapter::PUSH:
303 _last_push = window_at_cursor;
305 case osgGA::GUIEventAdapter::SCROLL:
306 case osgGA::GUIEventAdapter::MOVE:
309 case osgGA::GUIEventAdapter::RELEASE:
310 target_window = _last_push.lock();
314 case osgGA::GUIEventAdapter::DRAG:
315 target_window = _last_push.lock();
324 event.dx = event.x - _last_x;
325 event.dy = event.y - _last_y;
330 // Let the event position be always relative to the top left window corner
331 event.x -= target_window->getRegion().x();
332 event.y -= target_window->getRegion().y();
334 return target_window->handleMouseEvent(event);
340 //------------------------------------------------------------------------------
341 void GUIMgr::handleResize(int x, int y, int width, int height)
343 if( _width == width && _height == height )
349 // Origin should be at top left corner, therefore we need to mirror the y-axis
350 _transform->setMatrix(osg::Matrix(