OpenSceneGraph/examples/osgwidgetcanvas/osgwidgetcanvas.cpp

// -*-c++-*- osgWidget - Code by: Jeremy Moles (cubicool) 2007-2008
// $Id: osgwidgetcanvas.cpp 33 2008-04-04 19:03:12Z cubicool $

#include <osgWidget/Util>
#include <osgWidget/WindowManager>
#include <osgWidget/Canvas>

const unsigned int MASK_2D = 0xF0000000;

bool colorWidgetEnter(osgWidget::Event& event) {
    event.getWidget()->addColor(0.5f, 0.2f, 0.3f, 0.0f);

    // osgWidget::warn() << "WIDGET mouseEnter " << event.getWidget()->getName() << std::endl;
    
    return false;
}

bool colorWidgetLeave(osgWidget::Event& event) {
    event.getWidget()->addColor(-0.5f, -0.2f, -0.3f, 0.0f);

    // osgWidget::warn() << "WIDGET mouseLeave" << std::endl;
    
    return true;
}

bool windowMouseOver(osgWidget::Event& event) {
    osgWidget::XYCoord xy = event.getWindow()->localXY(event.x, event.y);

    // osgWidget::warn() << "WINDOW " << xy.x() << " - " << xy.y() << std::endl;

    return true;
}

bool widgetMouseOver(osgWidget::Event& event) {
    osgWidget::XYCoord xy = event.getWidget()->localXY(event.x, event.y);

    // osgWidget::warn() << "WIDGET mouseOver " << xy.x() << " - " << xy.y() << std::endl;

    return true;
}

osgWidget::Widget* createWidget(
    const std::string&       name,
    osgWidget::color_type    col,
    osgWidget::Widget::Layer layer
) {
    osgWidget::Widget* widget = new osgWidget::Widget(name, 200.0f, 200.0f);

    widget->setEventMask(osgWidget::EVENT_ALL);
    widget->addCallback(new osgWidget::Callback(&colorWidgetEnter, osgWidget::EVENT_MOUSE_PUSH));
    widget->addCallback(new osgWidget::Callback(&colorWidgetLeave, osgWidget::EVENT_MOUSE_RELEASE));
    widget->addCallback(new osgWidget::Callback(&colorWidgetEnter, osgWidget::EVENT_MOUSE_ENTER));
    widget->addCallback(new osgWidget::Callback(&colorWidgetLeave, osgWidget::EVENT_MOUSE_LEAVE));
    widget->addCallback(new osgWidget::Callback(&widgetMouseOver, osgWidget::EVENT_MOUSE_OVER));
    widget->setColor(col, col, col, 0.5f);
    widget->setLayer(layer);
    
    return widget;
}

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

    osgWidget::WindowManager* wm = new osgWidget::WindowManager(
        &viewer,
        1280.0f,
        1024.0f,
        MASK_2D,
        osgWidget::WindowManager::WM_PICK_DEBUG
    );
    
    osgWidget::Canvas* canvas = new osgWidget::Canvas("canvas");

    canvas->addCallback(new osgWidget::Callback(&windowMouseOver, osgWidget::EVENT_MOUSE_OVER));
    canvas->attachMoveCallback();
    canvas->attachRotateCallback();
    canvas->attachScaleCallback();

    canvas->addWidget(
        createWidget("w1", 0.2f, osgWidget::Widget::LAYER_LOW),
        0.0f,
        0.0f
    );
    
    canvas->addWidget(
        createWidget("w2", 0.4f, osgWidget::Widget::LAYER_MIDDLE),
        200.0f,
        0.0f
    );

    canvas->addWidget(
        createWidget("w3", 0.6f, osgWidget::Widget::LAYER_HIGH),
        400.0f,
        0.0f
    );

    // Add a child and then resize it relatively to the size of the parent Window.
    osgWidget::Widget* relWidget = new osgWidget::Widget("relative");

    relWidget->setLayer(osgWidget::Widget::LAYER_LOW, 1);
    relWidget->setCoordinateMode(osgWidget::Widget::CM_RELATIVE);
    relWidget->setSize(0.2f, 0.2f);
    relWidget->setColor(0.5f, 0.5f, 0.1f, 0.9f);

    osgWidget::warn() << canvas->getWidth() << std::endl;

    canvas->addWidget(relWidget, 0.4f, 0.4f);
    
    relWidget->addOrigin(0.1f, 0.1f);
    relWidget->addSize(0.2f, 0.2f);

    canvas->resize();

    // Finally, add the whole thing to the WindowManager.
    wm->addChild(canvas);

    return osgWidget::createExample(viewer, wm);
}

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

    osgWidget::WindowManager* wm = new osgWidget::WindowManager(
        &viewer,
        1280.0f,
        1024.0f,
        MASK_2D,
        osgWidget::WindowManager::WM_PICK_DEBUG
    );
    
    osgWidget::Canvas* canvas = new osgWidget::Canvas("canvas");

    canvas->addWidget(new osgWidget::Widget("spacer", 2.0f, 300.0f), 1280.0f, 0.0f);

    canvas->setOrigin(0.0f, 300.0f);

    wm->addChild(canvas);

    return osgWidget::createExample(viewer, wm);
}
*/