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 true;
}

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(osgWidget::Callback(&colorWidgetEnter, osgWidget::EVENT_MOUSE_PUSH));
	widget->addCallback(osgWidget::Callback(&colorWidgetLeave, osgWidget::EVENT_MOUSE_RELEASE));
	widget->addCallback(osgWidget::Callback(&colorWidgetEnter, osgWidget::EVENT_MOUSE_ENTER));
	widget->addCallback(osgWidget::Callback(&colorWidgetLeave, osgWidget::EVENT_MOUSE_LEAVE));
	widget->addCallback(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(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);
}