Mercurial > hg > orthanc-stone
diff Framework/Scene2D/Scene2D.cpp @ 582:e36e69a380a5
Scene2D
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Fri, 19 Apr 2019 16:43:08 +0200 |
parents | |
children | 6129b1e5ba42 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Framework/Scene2D/Scene2D.cpp Fri Apr 19 16:43:08 2019 +0200 @@ -0,0 +1,151 @@ +/** + * Stone of Orthanc + * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics + * Department, University Hospital of Liege, Belgium + * Copyright (C) 2017-2019 Osimis S.A., Belgium + * + * This program is free software: you can redistribute it and/or + * modify it under the terms of the GNU Affero General Public License + * as published by the Free Software Foundation, either version 3 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + **/ + + +#include "Scene2D.h" + +#include <Core/OrthancException.h> + + +namespace OrthancStone +{ + Scene2D::Scene2D(const Scene2D& other) : + sceneToCanvas_(other.sceneToCanvas_), + canvasToScene_(other.canvasToScene_) + { + for (Content::const_iterator it = other.content_.begin(); + it != other.content_.end(); ++it) + { + content_[it->first] = it->second->Clone(); + } + } + + + Scene2D::~Scene2D() + { + for (Content::iterator it = content_.begin(); + it != content_.end(); ++it) + { + assert(it->second != NULL); + delete it->second; + } + } + + + void Scene2D::SetLayer(int depth, + ISceneLayer* layer) // Takes ownership + { + std::auto_ptr<ISceneLayer> protection(layer); + + if (layer == NULL) + { + throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer); + } + + Content::iterator found = content_.find(depth); + + if (found == content_.end()) + { + content_[depth] = protection.release(); + } + else + { + assert(found->second != NULL); + delete found->second; + found->second = protection.release(); + } + } + + + void Scene2D::DeleteLayer(int depth) + { + Content::iterator found = content_.find(depth); + + if (found != content_.end()) + { + assert(found->second != NULL); + delete found->second; + content_.erase(found); + } + } + + + void Scene2D::Apply(IVisitor& visitor) + { + for (Content::const_iterator it = content_.begin(); + it != content_.end(); ++it) + { + assert(it->second != NULL); + visitor.Visit(*it->second, it->first); + } + } + + + void Scene2D::SetSceneToCanvasTransform(const AffineTransform2D& transform) + { + // Make sure the transform is invertible before making any change + AffineTransform2D inverse = AffineTransform2D::Invert(transform); + + sceneToCanvas_ = transform; + canvasToScene_ = inverse; + } + + + void Scene2D::FitContent(unsigned int canvasWidth, + unsigned int canvasHeight) + { + Extent2D extent; + + for (Content::const_iterator it = content_.begin(); + it != content_.end(); ++it) + { + assert(it->second != NULL); + + Extent2D tmp; + if (it->second->GetBoundingBox(tmp)) + { + extent.Union(tmp); + } + } + + if (!extent.IsEmpty()) + { + double zoomX = static_cast<double>(canvasWidth) / extent.GetWidth(); + double zoomY = static_cast<double>(canvasHeight) / extent.GetHeight(); + + double zoom = std::min(zoomX, zoomY); + if (LinearAlgebra::IsCloseToZero(zoom)) + { + zoom = 1; + } + + double panX = extent.GetCenterX(); + double panY = extent.GetCenterY(); + + // Bring the center of the scene to (0,0) + AffineTransform2D t1 = AffineTransform2D::CreateOffset(-panX, -panY); + + // Scale the scene + AffineTransform2D t2 = AffineTransform2D::CreateScaling(zoom, zoom); + + SetSceneToCanvasTransform(AffineTransform2D::Combine(t2, t1)); + } + } +}