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annotate Framework/Scene2D/PanSceneTracker.cpp @ 1370:28eb7106ef44 broker

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Changes to GuiAdapter to allow it to work correctly with both new and old Emscripten event selection rules that are defined by the DISABLE_DEPRECATED_FIND_EVENT_TARGET_BEHAVIOR linker flag. Doc has been added to GuiAdapter.cpp, should you require more info on what has been done.
author Benjamin Golinvaux <bgo@osimis.io>
date Mon, 20 Apr 2020 13:08:43 +0200
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1 /**
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2 * Stone of Orthanc
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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5 * Copyright (C) 2017-2020 Osimis S.A., Belgium
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU Affero General Public License
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9 * as published by the Free Software Foundation, either version 3 of
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10 * the License, or (at your option) any later version.
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11 *
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12 * This program is distributed in the hope that it will be useful, but
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 * Affero General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU Affero General Public License
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18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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19 **/
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22 #include "PanSceneTracker.h"
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23 #include "../Viewport/IViewport.h"
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24 #include "../Scene2DViewport/ViewportController.h"
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26 #include <memory>
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28 namespace OrthancStone
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29 {
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30 PanSceneTracker::PanSceneTracker(boost::shared_ptr<IViewport> viewport,
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31 const PointerEvent& event)
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32 : OneGesturePointerTracker(viewport)
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33 {
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35 std::unique_ptr<IViewport::ILock> lock(viewport_->Lock());
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37 originalSceneToCanvas_ = lock->GetController().GetSceneToCanvasTransform();
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38 originalCanvasToScene_ = lock->GetController().GetCanvasToSceneTransform();
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40 pivot_ = event.GetMainPosition().Apply(originalCanvasToScene_);
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41 }
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44 void PanSceneTracker::PointerMove(const PointerEvent& event)
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45 {
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46 ScenePoint2D p = event.GetMainPosition().Apply(originalCanvasToScene_);
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48 std::unique_ptr<IViewport::ILock> lock(viewport_->Lock());
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50 lock->GetController().SetSceneToCanvasTransform(
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51 AffineTransform2D::Combine(
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52 originalSceneToCanvas_,
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53 AffineTransform2D::CreateOffset(p.GetX() - pivot_.GetX(),
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54 p.GetY() - pivot_.GetY())));
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55 lock->Invalidate();
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56 }
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58 void PanSceneTracker::Cancel()
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59 {
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60 std::unique_ptr<IViewport::ILock> lock(viewport_->Lock());
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61 lock->GetController().SetSceneToCanvasTransform(originalSceneToCanvas_);
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62 }
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63 }