Mercurial > hg > orthanc-stone
view Framework/Widgets/PanZoomMouseTracker.cpp @ 702:c0a5eb9a4290 refactor-viewport-controller
Merge from default
author | Benjamin Golinvaux <bgo@osimis.io> |
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date | Sun, 19 May 2019 16:29:50 +0200 |
parents | 3b4df9925db6 |
children | 4f2416d519b4 |
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/** * 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 "PanZoomMouseTracker.h" #include <Core/Logging.h> #include <Core/OrthancException.h> #include <math.h> namespace OrthancStone { Touch GetCenter(const std::vector<Touch>& touches) { return Touch((touches[0].x + touches[1].x) / 2.0f, (touches[0].y + touches[1].y) / 2.0f); } double GetDistance(const std::vector<Touch>& touches) { float dx = touches[0].x - touches[1].x; float dy = touches[0].y - touches[1].y; return sqrt((double)(dx * dx) + (double)(dy * dy)); } PanZoomMouseTracker::PanZoomMouseTracker(WorldSceneWidget& that, const std::vector<Touch>& startTouches) : that_(that), originalZoom_(that.GetView().GetZoom()) { that.GetView().GetPan(originalPanX_, originalPanY_); that.GetView().MapPixelCenterToScene(originalSceneTouches_, startTouches); originalDisplayCenter_ = GetCenter(startTouches); originalSceneCenter_ = GetCenter(originalSceneTouches_); originalDisplayDistanceBetweenTouches_ = GetDistance(startTouches); // printf("original Pan %f %f\n", originalPanX_, originalPanY_); // printf("original Zoom %f \n", originalZoom_); // printf("original distance %f \n", (float)originalDisplayDistanceBetweenTouches_); // printf("original display touches 0 %f %f\n", startTouches[0].x, startTouches[0].y); // printf("original display touches 1 %f %f\n", startTouches[1].x, startTouches[1].y); // printf("original Scene center %f %f\n", originalSceneCenter_.x, originalSceneCenter_.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 PanZoomMouseTracker::Render(CairoContext& context, double zoom) { throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); } void PanZoomMouseTracker::MouseMove(int displayX, int displayY, double x, double y, const std::vector<Touch>& displayTouches, const std::vector<Touch>& sceneTouches) { ViewportGeometry view = that_.GetView(); // printf("Display touches 0 %f %f\n", displayTouches[0].x, displayTouches[0].y); // printf("Display touches 1 %f %f\n", displayTouches[1].x, displayTouches[1].y); // printf("Scene touches 0 %f %f\n", sceneTouches[0].x, sceneTouches[0].y); // printf("Scene touches 1 %f %f\n", sceneTouches[1].x, sceneTouches[1].y); // printf("zoom = %f\n", view.GetZoom()); Touch currentSceneCenter = GetCenter(sceneTouches); double panX = originalPanX_ + (currentSceneCenter.x - originalSceneCenter_.x) * view.GetZoom(); double panY = originalPanY_ + (currentSceneCenter.y - originalSceneCenter_.y) * view.GetZoom(); view.SetPan(panX, panY); static const double MIN_ZOOM = -4; static const double MAX_ZOOM = 4; if (!idle_) { double currentDistanceBetweenTouches = GetDistance(displayTouches); double dy = static_cast<double>(currentDistanceBetweenTouches - originalDisplayDistanceBetweenTouches_) * 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); view.SetZoom(z * originalZoom_); } that_.SetView(view); } }