Implemented clipping of widget to the widgets extents.

include/osgUI/Style

@@ -16,6 +16,7 @@
 
 #include <osg/Object>
 #include <osg/BoundingBox>
+#include <osg/Texture2D>
 #include <osg/Vec4>
 
 #include <osgUI/AlignmentSettings>
@@ -48,10 +49,13 @@ public:
     virtual osg::Node* createText(const osg::BoundingBox& extents, const AlignmentSettings* as, const TextSettings* textSettings, const std::string& text);
     virtual osg::Node* createIcon(const osg::BoundingBox& extents, const std::string& filename);
     virtual void setupDialogStateSet(osg::StateSet* stateset);
-    
+    virtual void setupClipStateSet(const osg::BoundingBox& extents, osg::StateSet* stateset);
+
 protected:
     virtual ~Style() {}
 
+    osg::ref_ptr<osg::Texture2D> _clipTexture;
+
     osg::Vec4 _backgroundColor;
     osg::Vec4 _textColor;
     osg::Vec4 _disabledTextColor;

src/osgUI/ComboBox.cpp

@@ -99,43 +99,31 @@ void ComboBox::setCurrentItem(unsigned int i)
 
 void ComboBox::createGraphicsImplementation()
 {
+    Style* style = (getStyle()!=0) ? getStyle() : Style::instance().get();
 
-    if (_switch.valid() && _switch->getNumChildren()==_items.size())
+    _switch = new osg::Switch;
+
+    if (!_items.empty())
     {
-        OSG_NOTICE<<"Need to update existing scene graph"<<std::endl;
+        for(Items::iterator itr = _items.begin();
-        _graphicsInitialized = true;
+            itr != _items.end();
+            ++itr)
+        {
+            Item* item = itr->get();
+            OSG_NOTICE<<"Creating item "<<item->getText()<<", "<<item->getColor()<<std::endl;
+            osg::ref_ptr<osg::Group> group = new osg::Group;
+            if (item->getColor().a()!=0.0f) group->addChild( style->createPanel(_extents, item->getColor()) );
+            if (!item->getText().empty()) group->addChild( style->createText(_extents, getAlignmentSettings(), getTextSettings(), item->getText()) );
+            _switch->addChild(group.get());
+        }
     }
     else
     {
-        OSG_NOTICE<<"ComboBox::createGraphicsImplementation()"<<std::endl;
+        _switch->addChild( style->createPanel(_extents, osg::Vec4(1.0f,1.0f,1.0f,1.0f)) );
-
-        Widget::createGraphicsImplementation();
-
-        Style* style = (getStyle()!=0) ? getStyle() : Style::instance().get();
-
-        _switch = new osg::Switch;
-
-        if (!_items.empty())
-        {
-            for(Items::iterator itr = _items.begin();
-                itr != _items.end();
-                ++itr)
-            {
-                Item* item = itr->get();
-                OSG_NOTICE<<"Creating item "<<item->getText()<<", "<<item->getColor()<<std::endl;
-                osg::ref_ptr<osg::Group> group = new osg::Group;
-                if (item->getColor().a()!=0.0f) group->addChild( style->createPanel(_extents, item->getColor()) );
-                if (!item->getText().empty()) group->addChild( style->createText(_extents, getAlignmentSettings(), getTextSettings(), item->getText()) );
-                _switch->addChild(group.get());
-            }
-        }
-        else
-        {
-            _switch->addChild( style->createPanel(_extents, osg::Vec4(1.0f,1.0f,1.0f,1.0f)) );
-        }
-
-        _switch->setSingleChildOn(_currentItem);
-
-        setGraphicsSubgraph(_switch.get());
     }
+
+    _switch->setSingleChildOn(_currentItem);
+
+    style->setupClipStateSet(_extents, getOrCreateStateSet());
+    setGraphicsSubgraph(_switch.get());
 }

src/osgUI/Dialog.cpp

@@ -69,28 +69,33 @@ void Dialog::open()
 
 void Dialog::createGraphicsImplementation()
 {
-    OSG_NOTICE<<"Dialog::createGraphicsImplementation()"<<std::endl;
-
     _transform = new osg::PositionAttitudeTransform;
 
     Style* style = (getStyle()!=0) ? getStyle() : Style::instance().get();
 
-    float titleHeight = 1.0;
+    float titleHeight = 10.0;
     osg::BoundingBox titleBarExents(_extents.xMin(), _extents.yMax(), _extents.zMin(), _extents.xMax(), _extents.yMax()+titleHeight, _extents.zMin());
 
-
     osg::Vec4 dialogBackgroundColor(0.8,0.8,0.8,1.0);
     osg::Vec4 dialogTitleBackgroundColor(0.5,0.5,1.0,1.0);
 
     _transform->addChild( style->createPanel(_extents, dialogBackgroundColor) );
     _transform->addChild( style->createPanel(titleBarExents, dialogTitleBackgroundColor) );
 
+    osg::BoundingBox dialogWithTileExtents(_extents);
+    dialogWithTileExtents.expandBy(titleBarExents);
+
+    OSG_NOTICE<<"Dialog::_extents ("<<_extents.xMin()<<", "<<_extents.yMin()<<", "<<_extents.zMin()<<"), ("<<_extents.xMax()<<", "<<_extents.yMax()<<", "<<_extents.zMax()<<")"<<std::endl;
+    OSG_NOTICE<<"Dialog::titleBarExents ("<<titleBarExents.xMin()<<", "<<titleBarExents.yMin()<<", "<<titleBarExents.zMin()<<"), ("<<titleBarExents.xMax()<<", "<<titleBarExents.yMax()<<", "<<titleBarExents.zMax()<<")"<<std::endl;
+    OSG_NOTICE<<"Dialog::dialogWithTileExtents ("<<dialogWithTileExtents.xMin()<<", "<<dialogWithTileExtents.yMin()<<", "<<dialogWithTileExtents.zMin()<<"), ("<<dialogWithTileExtents.xMax()<<", "<<dialogWithTileExtents.yMax()<<", "<<dialogWithTileExtents.zMax()<<")"<<std::endl;
+
     osg::ref_ptr<Node> node = style->createText(titleBarExents, getAlignmentSettings(), getTextSettings(), _title);
     _titleDrawable = dynamic_cast<osgText::Text*>(node.get());
     _titleDrawable->setDataVariance(osg::Object::DYNAMIC);
     _transform->addChild(_titleDrawable.get());
 
     style->setupDialogStateSet(getOrCreateStateSet());
+    style->setupClipStateSet(dialogWithTileExtents, getOrCreateStateSet());
 
     setGraphicsSubgraph(_transform.get());
 }

src/osgUI/LineEdit.cpp

@@ -32,8 +32,6 @@ LineEdit::LineEdit(const osgUI::LineEdit& label, const osg::CopyOp& copyop):
 
 bool LineEdit::handleImplementation(osgGA::EventVisitor* ev, osgGA::Event* event)
 {
-    OSG_NOTICE<<"LineEdit::handleImplementation"<<std::endl;
-
     osgGA::GUIEventAdapter* ea = event->asGUIEventAdapter();
     if (!ea) return false;
 
@@ -78,12 +76,12 @@ void LineEdit::setText(const std::string& text)
 
 void LineEdit::createGraphicsImplementation()
 {
-    OSG_NOTICE<<"LineEdit::createGraphicsImplementation()"<<std::endl;
-
     Style* style = (getStyle()!=0) ? getStyle() : Style::instance().get();
     osg::ref_ptr<Node> node = style->createText(_extents, getAlignmentSettings(), getTextSettings(), _text);
     _textDrawable = dynamic_cast<osgText::Text*>(node.get());
     _textDrawable->setDataVariance(osg::Object::DYNAMIC);
 
+    style->setupClipStateSet(_extents, getOrCreateStateSet());
+
     setGraphicsSubgraph(_textDrawable.get());
 }

src/osgUI/Popup.cpp

@@ -76,9 +76,7 @@ void Popup::leaveImplementation()
 
 void Popup::createGraphicsImplementation()
 {
-    OSG_NOTICE<<"Popup::createGraphicsImplementation()"<<std::endl;
+   _transform = new osg::PositionAttitudeTransform;
-
-    _transform = new osg::PositionAttitudeTransform;
 
     Style* style = (getStyle()!=0) ? getStyle() : Style::instance().get();
 
@@ -87,6 +85,7 @@ void Popup::createGraphicsImplementation()
     _transform->addChild( style->createPanel(_extents, dialogBackgroundColor) );
 
     style->setupDialogStateSet(getOrCreateStateSet());
+    style->setupClipStateSet(_extents, getOrCreateStateSet());
 
     setGraphicsSubgraph(_transform.get());
 }

src/osgUI/PushButton.cpp

@@ -71,8 +71,6 @@ void PushButton::leaveImplementation()
 
 void PushButton::createGraphicsImplementation()
 {
-    OSG_NOTICE<<"PushButton::createGraphicsImplementation()"<<std::endl;
-
     osg::ref_ptr<osg::Group> group = new osg::Group;
 
     Style* style = (getStyle()!=0) ? getStyle() : Style::instance().get();
@@ -97,6 +95,8 @@ void PushButton::createGraphicsImplementation()
 
     group->addChild(_textDrawable.get());
 
+    style->setupClipStateSet(_extents, getOrCreateStateSet());
+
     setGraphicsSubgraph(group.get());
 }
 

src/osgUI/Style.cpp

@@ -14,7 +14,10 @@
 #include <osgUI/Style>
 #include <osg/Geode>
 #include <osg/Depth>
+#include <osg/TexGen>
+#include <osg/AlphaFunc>
 #include <osgText/Text>
+#include <osgDB/ReadFile>
 
 using namespace osgUI;
 
@@ -28,10 +31,25 @@ OSG_INIT_SINGLETON_PROXY(StyleSingletonProxy, Style::instance())
 
 Style::Style()
 {
+    osg::ref_ptr<osg::Image> image = new osg::Image;
+    image->allocateImage(1,1,1,GL_RGBA, GL_FLOAT);
+    *(reinterpret_cast<osg::Vec4f*>(image->data(0,0,0))) = osg::Vec4f(1.0f, 1.0f, 1.0f, 1.0f);
+
+    _clipTexture = new osg::Texture2D;
+    _clipTexture->setImage(image.get());
+    _clipTexture->setBorderColor(osg::Vec4f(1.0f,1.0f,0.5f,0.0f));
+    _clipTexture->setWrap(osg::Texture::WRAP_S, osg::Texture::CLAMP_TO_BORDER);
+    _clipTexture->setWrap(osg::Texture::WRAP_T, osg::Texture::CLAMP_TO_BORDER);
+    _clipTexture->setFilter(osg::Texture::MIN_FILTER, osg::Texture::NEAREST);
+    _clipTexture->setFilter(osg::Texture::MAG_FILTER, osg::Texture::NEAREST);
+
+    //image = osgDB::readImageFile("Images/lz.rgb");
+    //_clipTexture->setImage(image.get());
 }
 
 Style::Style(const Style& style, const osg::CopyOp& copyop):
-    osg::Object(style, copyop)
+    osg::Object(style, copyop),
+    _clipTexture(style._clipTexture)
 {
 }
 
@@ -93,6 +111,23 @@ osg::Node* Style::createIcon(const osg::BoundingBox& extents, const std::string&
 void Style::setupDialogStateSet(osg::StateSet* stateset)
 {
     stateset->setRenderBinDetails(5, "TraversalOrderBin", osg::StateSet::OVERRIDE_RENDERBIN_DETAILS);
-    stateset->setAttributeAndModes( new osg::Depth(osg::Depth::LESS,0.0, 1.0,false), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE );
     stateset->setMode( GL_LIGHTING, osg::StateAttribute::OFF );
+    stateset->setAttributeAndModes( new osg::Depth(osg::Depth::LESS,0.0, 1.0,false), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE );
+}
+
+void Style::setupClipStateSet(const osg::BoundingBox& extents, osg::StateSet* stateset)
+{
+    unsigned int clipTextureUnit = 1;
+
+    stateset->setAttributeAndModes( new osg::AlphaFunc(osg::AlphaFunc::GREATER, 0.0f), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);
+
+    stateset->setTextureAttributeAndModes( clipTextureUnit, _clipTexture.get(), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);
+
+    osg::Matrixd matrix = osg::Matrixd::translate(osg::Vec3(-extents.xMin(), -extents.yMin(), -extents.zMin()))*
+                          osg::Matrixd::scale(osg::Vec3(1.0f/(extents.xMax()-extents.xMin()), 1.0f/(extents.yMax()-extents.yMin()), 1.0f));
+
+    osg::ref_ptr<osg::TexGen> texgen = new osg::TexGen;
+    texgen->setPlanesFromMatrix(matrix);
+    texgen->setMode(osg::TexGen::OBJECT_LINEAR);
+    stateset->setTextureAttributeAndModes( clipTextureUnit, texgen.get(), osg::StateAttribute::ON);
 }