From Jeremy Moles, updates to osgwidget examples.

Merged by Robert Osfield from OpenSceneGraph-osgWidget-dev

examples/osgwidgetprogress/osgwidgetprogress.cpp

@@ -0,0 +1,91 @@
+// -*-c++-*- osgWidget - Code by: Jeremy Moles (cubicool) 2007-2008
+// $Id$
+
+#include <osgDB/ReadFile>
+#include <osgWidget/Util>
+#include <osgWidget/WindowManager>
+#include <osgWidget/Canvas>
+
+const unsigned int MASK_2D = 0xF0000000;
+
+struct UpdateProgressNode: public osg::NodeCallback {
+	float start;
+	float done;
+
+	UpdateProgressNode():
+	start (0.0f),
+	done  (5.0f) {
+	}
+
+	virtual void operator()(osg::Node* node, osg::NodeVisitor* nv) {
+		const osg::FrameStamp* fs = nv->getFrameStamp();
+
+		float t = fs->getSimulationTime();
+
+		if(start == 0.0f) start = t;
+
+		float width   = ((t - start) / done) * 512.0f;
+		float percent = (width / 512.0f) * 100.0f;
+	
+		if(width < 1.0f || width > 512.0f) return;
+
+		osgWidget::Window* window = dynamic_cast<osgWidget::Window*>(node);
+
+		if(!window) return;
+
+		osgWidget::Widget* w = window->getByName("pMeter");
+		osgWidget::Label*  l = dynamic_cast<osgWidget::Label*>(window->getByName("pLabel"));
+
+		if(!w || !l) return;
+
+		w->setWidth(width);
+		w->setTexCoordRegion(0.0f, 0.0f, width, 64.0f);
+
+		std::ostringstream ss;
+
+		ss << osg::round(percent) << "% Done" << std::endl;
+
+		l->setLabel(ss.str());
+	}
+};
+
+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");
+	osgWidget::Widget* pOutline = new osgWidget::Widget("pOutline", 512.0f, 64.0f);
+	osgWidget::Widget* pMeter   = new osgWidget::Widget("pMeter", 0.0f, 64.0f);
+	osgWidget::Label*  pLabel   = new osgWidget::Label("pLabel", "0% Done");
+
+	pOutline->setImage("osgWidget/progress-outline.png", true);
+	pOutline->setLayer(osgWidget::Widget::LAYER_MIDDLE, 2);
+	
+	pMeter->setImage("osgWidget/progress-meter.png");
+	pMeter->setColor(0.7f, 0.1f, 0.1f, 0.7f);
+	pMeter->setLayer(osgWidget::Widget::LAYER_MIDDLE, 1);
+
+	pLabel->setFont("fonts/VeraMono.ttf");
+	pLabel->setFontSize(20);
+	pLabel->setFontColor(1.0f, 1.0f, 1.0f, 1.0f);
+	pLabel->setSize(512.0f, 64.0f);
+	pLabel->setLayer(osgWidget::Widget::LAYER_MIDDLE, 3);
+
+	canvas->setOrigin(300.0f, 300.0f);
+	canvas->addWidget(pMeter, 0.0f, 0.0f);
+	canvas->addWidget(pOutline, 0.0f, 0.0f);
+	canvas->addWidget(pLabel, 0.0f, 0.0f);
+	canvas->getBackground()->setColor(0.0f, 0.0f, 0.0f, 0.0f);
+	canvas->setUpdateCallback(new UpdateProgressNode());
+
+	wm->addChild(canvas);
+
+	return osgWidget::createExample(viewer, wm, osgDB::readNodeFile("cow.osg"));
+}