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annotate Framework/Scene2DViewport/OneGesturePointerTracker.h @ 700:059e1fd05fd6 refactor-viewport-controller

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Introduced the ViewportController that sits between the application and the Scene2D to handle the trackers and measuring tools. This is a work in progress. The Scene2D is no longer an observable. Message sending is managed by the ViewportController. Move some refs to shared and weak to prevent lifetime issues.
author Benjamin Golinvaux <bgo@osimis.io>
date Sun, 19 May 2019 16:26:17 +0200
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children 28b9e3a54200
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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) 2017-2019 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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20
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21 #pragma once
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22
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23 #include "IFlexiblePointerTracker.h"
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25 namespace OrthancStone
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26 {
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27 /**
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28 This base is class allows to write simple trackers that deal with single
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29 drag gestures. It is *not* suitables for multi-state trackers where various
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30 mouse operations need to be handled.
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31
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32 In order to write such a tracker:
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33 - subclass this class
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34 - you may store the initial click/touch position in the constructor
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35 - implement PointerMove to react to pointer/touch events
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36 - implement Cancel to restore the state at initial tracker creation time
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37 */
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38 class OneGesturePointerTracker : public IFlexiblePointerTracker
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39 {
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40 public:
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41 OneGesturePointerTracker(ViewportControllerWPtr controllerW);
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42 virtual void PointerUp(const PointerEvent& event) ORTHANC_OVERRIDE;
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43 virtual void PointerDown(const PointerEvent& event) ORTHANC_OVERRIDE;
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44 virtual bool IsAlive() const ORTHANC_OVERRIDE;
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45
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46 protected:
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47 ViewportControllerPtr GetController();
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48
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49 private:
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50 ViewportControllerWPtr controllerW_;
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51 bool alive_;
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52 };
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53 }
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54