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Added support for enable/disabling the keystone editing using the Ctrl-g key to toggle the UI and grid on/off.

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This commit is contained in:
Robert Osfield 2013-04-12 13:01:51 +00:00
parent efbf05cd59
commit bc288d23dc
1 changed files with 100 additions and 60 deletions
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48
examples/osgkeystone/osgkeystone.cpp
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@ -32,6 +32,7 @@ class Keystone : public osg::Referenced
{
public:
Keystone():
keystoneEditingEnabled(false),
bottom_left(-1.0,-1.0),
bottom_right(1.0,-1.0),
top_left(-1.0,1.0),
@ -48,6 +49,7 @@ public:
Keystone& operator = (const Keystone& rhs)
{
if (&rhs==this) return *this;
keystoneEditingEnabled = rhs.keystoneEditingEnabled;
bottom_left = rhs.bottom_left;
bottom_right = rhs.bottom_right;
top_left = rhs.top_left;
@ -55,6 +57,8 @@ public:
return *this;
}
bool keystoneEditingEnabled;
osg::Vec2d bottom_left;
osg::Vec2d bottom_right;
osg::Vec2d top_left;
@ -93,6 +97,9 @@ public:
bool handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter& aa);
void setKeystoneEditingEnabled(bool enabled) { if (_currentControlPoints.valid()) _currentControlPoints->keystoneEditingEnabled = enabled; }
bool getKeystoneEditingEnabled() const { return _currentControlPoints.valid() ? _currentControlPoints->keystoneEditingEnabled : false; }
enum Region
{
NONE_SELECTED,
@ -224,6 +231,8 @@ bool KeystoneHandler::handle(const osgGA::GUIEventAdapter& ea, osgGA::GUIActionA
switch(ea.getEventType())
{
case(osgGA::GUIEventAdapter::PUSH):
{
if (getKeystoneEditingEnabled())
{
osg::Vec2d scale = incrementScale(ea);
if (scale.length2()!=0.0)
@ -236,9 +245,12 @@ bool KeystoneHandler::handle(const osgGA::GUIEventAdapter& ea, osgGA::GUIActionA
{
_selectedRegion = NONE_SELECTED;
}
}
return false;
}
case(osgGA::GUIEventAdapter::DRAG):
{
if (getKeystoneEditingEnabled())
{
if (_selectedRegion!=NONE_SELECTED)
{
@ -249,17 +261,26 @@ bool KeystoneHandler::handle(const osgGA::GUIEventAdapter& ea, osgGA::GUIActionA
move(_selectedRegion, osg::Vec2d(delta.x()*scale.x(), delta.y()*scale.y()) );
return true;
}
}
return false;
}
case(osgGA::GUIEventAdapter::RELEASE):
{
if (getKeystoneEditingEnabled())
{
_selectedRegion = NONE_SELECTED;
}
return false;
}
case(osgGA::GUIEventAdapter::KEYDOWN):
{
if (ea.getKey()=='r')
if (getKeystoneEditingEnabled())
{
if (ea.getUnmodifiedKey()=='g' && (ea.getModKeyMask()==osgGA::GUIEventAdapter::MODKEY_LEFT_CTRL || ea.getModKeyMask()==osgGA::GUIEventAdapter::MODKEY_RIGHT_CTRL))
{
setKeystoneEditingEnabled(false);
}
else if (ea.getKey()=='r')
{
_selectedRegion = NONE_SELECTED;
_startControlPoints->reset();
@ -297,9 +318,10 @@ bool KeystoneHandler::handle(const osgGA::GUIEventAdapter& ea, osgGA::GUIActionA
{
_currentControlPoints->bottom_left.set(ea.getXnormalized(), ea.getYnormalized());
}
else
}
else if (ea.getUnmodifiedKey()=='g' && (ea.getModKeyMask()==osgGA::GUIEventAdapter::MODKEY_LEFT_CTRL || ea.getModKeyMask()==osgGA::GUIEventAdapter::MODKEY_RIGHT_CTRL))
{
OSG_NOTICE<<"key = 0x"<<std::hex<<ea.getKey()<<std::dec<<std::endl;
setKeystoneEditingEnabled(true);
}
return false;
}
@ -307,6 +329,22 @@ bool KeystoneHandler::handle(const osgGA::GUIEventAdapter& ea, osgGA::GUIActionA
return false;
}
}
struct KeystoneCullCallback : public osg::Drawable::CullCallback
{
KeystoneCullCallback(Keystone* keystone=0):_keystone(keystone) {}
KeystoneCullCallback(const KeystoneCullCallback&, const osg::CopyOp&) {}
META_Object(osg,KeystoneCullCallback);
/** do customized cull code, return true if drawable should be culled.*/
virtual bool cull(osg::NodeVisitor* nv, osg::Drawable* drawable, osg::RenderInfo* renderInfo) const
{
return _keystone.valid() ? !_keystone->keystoneEditingEnabled : true;
}
osg::ref_ptr<Keystone> _keystone;
};
struct KeystoneUpdateCallback : public osg::Drawable::UpdateCallback
{
@ -429,6 +467,8 @@ osg::Node* createGrid(Keystone* keystone, const osg::Vec4& colour)
osg::ref_ptr<KeystoneUpdateCallback> kuc = new KeystoneUpdateCallback(keystone);
geometry->setUpdateCallback(kuc.get());
geometry->setCullCallback(new KeystoneCullCallback(keystone));
osg::ref_ptr<osg::Vec4Array> colours = new osg::Vec4Array;
colours->push_back(osg::Vec4(1.0f,1.0f,1.0f,1.0f));
geometry->setColorArray(colours.get());