Mercurial > hg > orthanc-stone
diff Framework/Deprecated/Widgets/ZoomMouseTracker.cpp @ 732:c35e98d22764
move Deprecated classes to a separate folder
author | Sebastien Jodogne <s.jodogne@gmail.com> |
---|---|
date | Tue, 21 May 2019 14:27:35 +0200 |
parents | Framework/Widgets/ZoomMouseTracker.cpp@4f2416d519b4 |
children | 2d8ab34c8c91 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Framework/Deprecated/Widgets/ZoomMouseTracker.cpp Tue May 21 14:27:35 2019 +0200 @@ -0,0 +1,110 @@ +/** + * 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 "ZoomMouseTracker.h" + +#include <Core/Logging.h> +#include <Core/OrthancException.h> + +namespace Deprecated +{ + ZoomMouseTracker::ZoomMouseTracker(WorldSceneWidget& that, + int x, + int y) : + that_(that), + originalZoom_(that.GetView().GetZoom()), + downX_(x), + downY_(y) + { + that.GetView().MapPixelCenterToScene(centerX_, centerY_, x, y); + + unsigned int height = that.GetView().GetDisplayHeight(); + + if (height <= 3) + { + idle_ = true; + LOG(WARNING) << "image is too small to zoom (current height = " << height << ")"; + } + else + { + idle_ = false; + normalization_ = 1.0 / static_cast<double>(height - 1); + } + } + + + void ZoomMouseTracker::Render(OrthancStone::CairoContext& context, + double zoom) + { + throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); + } + + + void ZoomMouseTracker::MouseMove(int displayX, + int displayY, + double x, + double y, + const std::vector<Touch>& displayTouches, + const std::vector<Touch>& sceneTouches) + { + static const double MIN_ZOOM = -4; + static const double MAX_ZOOM = 4; + + + if (!idle_) + { + double dy = static_cast<double>(displayY - downY_) * normalization_; // In the range [-1,1] + double z; + + // Linear interpolation from [-1, 1] to [MIN_ZOOM, MAX_ZOOM] + if (dy < -1.0) + { + z = MIN_ZOOM; + } + else if (dy > 1.0) + { + z = MAX_ZOOM; + } + else + { + z = MIN_ZOOM + (MAX_ZOOM - MIN_ZOOM) * (dy + 1.0) / 2.0; + } + + z = pow(2.0, z); + + ViewportGeometry view = that_.GetView(); + + view.SetZoom(z * originalZoom_); + + // Correct the pan so that the original click point is kept at + // the same location on the display + double panX, panY; + view.GetPan(panX, panY); + + int tx, ty; + view.MapSceneToDisplay(tx, ty, centerX_, centerY_); + view.SetPan(panX + static_cast<double>(downX_ - tx), + panY + static_cast<double>(downY_ - ty)); + + that_.SetView(view); + } + } +}