root/OpenSceneGraph/trunk/examples/osgwidgetaddremove/osgwidgetaddremove.cpp @ 8588

// -*-c++-*- osgWidget - Code by: Jeremy Moles (cubicool) 2007-2008
// $Id: osgwidgetaddremove.cpp 45 2008-04-23 16:46:11Z cubicool $

#include <osgWidget/Util>
#include <osgWidget/WindowManager>
#include <osgWidget/Table>
#include <osgWidget/Box>
#include <osgWidget/Label>

const unsigned int MASK_2D = 0xF0000000;

class ABCWidget: public osgWidget::Label {
public:
        ABCWidget(const std::string& label):
        osgWidget::Label("", label) {
                setFont("fonts/Calibri1.ttf");
                setFontSize(20);
                setCanFill(true);
                setShadow(0.08f);
                addSize(10.0f, 10.0f);
        }
};

class Button: public osgWidget::Label {
public:
        Button(const std::string& label):
        osgWidget::Label("", label) {
                setFont("fonts/Calibri1.ttf");
                setFontSize(30);
                setColor(0.8f, 0.2f, 0.2f, 0.8f);
                setCanFill(true);
                setShadow(0.1f);
                setEventMask(osgWidget::EVENT_MASK_MOUSE_CLICK);
                addSize(20.0f, 20.0f);
        }

        // NOTE! I need to make it clearer than Push/Release can happen so fast that
        // the changes you make aren't visible with your refresh rate. Throttling state
        // changes and what-have-you on mousePush/mouseRelease/etc. is going to be
        // annoying...

        virtual bool mousePush(double, double, osgWidget::WindowManager*) {
                addColor(0.2f, 0.2f, 0.2f, 0.0f);
                
                return true;
        }

        virtual bool mouseRelease(double, double, osgWidget::WindowManager*) {
                addColor(-0.2f, -0.2f, -0.2f, 0.0f);
                
                return true;
        }
};

class AddRemove: public osgWidget::Box {
        osg::ref_ptr<osgWidget::Window> _win1;

public:
        AddRemove():
        osgWidget::Box ("buttons", osgWidget::Box::VERTICAL),
        _win1          (new osgWidget::Box("win1", osgWidget::Box::VERTICAL)) {
                addWidget(new Button("Add Widget"));
                addWidget(new Button("Remove Widget"));

                // Take special note here! Not only do the Button objects have their
                // own overridden methods for changing the color, but they have attached
                // callbacks for doing the work with local data.
                getByName("Widget_1")->addCallback(osgWidget::Callback(
                        &AddRemove::handlePressAdd,
                        this,
                        osgWidget::EVENT_MOUSE_PUSH
                ));

                getByName("Widget_2")->addCallback(osgWidget::Callback(
                        &AddRemove::handlePressRemove,
                        this,
                        osgWidget::EVENT_MOUSE_PUSH
                ));
        }

        virtual void managed(osgWidget::WindowManager* wm) {
                osgWidget::Box::managed(wm);

                _win1->setOrigin(250.0f, 0.0f);

                wm->addChild(_win1.get());
        }

        bool handlePressAdd(osgWidget::Event& ev) {
                static unsigned int num = 0;

                std::stringstream ss;

                ss << "a random widget " << num;

                _win1->addWidget(new ABCWidget(ss.str()));
                _win1->resize();

                num++;

                return true;
        }

        bool handlePressRemove(osgWidget::Event& ev) {
                // TODO: Temporary hack!
                const osgWidget::Box::Vector& v = _win1->getObjects();
        
                if(!v.size()) return false;

                osgWidget::Widget* w = _win1->getObjects()[v.size() - 1].get();

                _win1->removeWidget(w);
                _win1->resize();

                return true;
        }
};

int main(int argc, char** argv) {
        osgViewer::Viewer viewer;

        osgWidget::WindowManager* wm = new osgWidget::WindowManager(
                &viewer,
                1280.0f,
                1024.0f,
                MASK_2D
        );
        
        osgWidget::Box* buttons = new AddRemove();

        wm->addChild(buttons);

        return createExample(viewer, wm);
}