Mercurial > hg > orthanc-stone
annotate Framework/Scene2D/ZoomSceneTracker.cpp @ 700:059e1fd05fd6 refactor-viewport-controller
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 |
| parents | 7efa2543699d |
| children | c0fcb2757b0a |
| rev | line source |
|---|---|
| 596 | 1 /** |
| 2 * Stone of Orthanc | |
| 3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics | |
| 4 * Department, University Hospital of Liege, Belgium | |
| 5 * Copyright (C) 2017-2019 Osimis S.A., Belgium | |
| 6 * | |
| 7 * This program is free software: you can redistribute it and/or | |
| 8 * modify it under the terms of the GNU Affero General Public License | |
| 9 * as published by the Free Software Foundation, either version 3 of | |
| 10 * the License, or (at your option) any later version. | |
| 11 * | |
| 12 * This program is distributed in the hope that it will be useful, but | |
| 13 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 15 * Affero General Public License for more details. | |
| 16 * | |
| 17 * You should have received a copy of the GNU Affero General Public License | |
| 18 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 19 **/ | |
| 20 | |
| 21 | |
| 22 #include "ZoomSceneTracker.h" | |
|
700
059e1fd05fd6
Introduced the ViewportController that sits between the application and the
Benjamin Golinvaux <bgo@osimis.io>
parents:
617
diff
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23 #include <Framework/Scene2DViewport/ViewportController.h> |
| 596 | 24 |
| 25 namespace OrthancStone | |
| 26 { | |
|
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Introduced the ViewportController that sits between the application and the
Benjamin Golinvaux <bgo@osimis.io>
parents:
617
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27 ZoomSceneTracker::ZoomSceneTracker(ViewportControllerWPtr controllerW, |
| 596 | 28 const PointerEvent& event, |
|
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29 unsigned int canvasHeight) |
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30 : OneGesturePointerTracker(controllerW) |
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31 , clickY_(event.GetMainPosition().GetY()) |
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32 , aligner_(controllerW, event.GetMainPosition()) |
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33 , originalSceneToCanvas_(GetController()->GetSceneToCanvasTransform()) |
| 596 | 34 { |
| 35 if (canvasHeight <= 3) | |
| 36 { | |
| 37 active_ = false; | |
| 38 } | |
| 39 else | |
| 40 { | |
| 41 normalization_ = 1.0 / static_cast<double>(canvasHeight - 1); | |
| 42 active_ = true; | |
| 43 } | |
| 44 } | |
| 45 | |
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parents:
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46 void ZoomSceneTracker::PointerMove(const PointerEvent& event) |
| 596 | 47 { |
| 48 static const double MIN_ZOOM = -4; | |
| 49 static const double MAX_ZOOM = 4; | |
| 50 | |
| 51 if (active_) | |
| 52 { | |
| 53 double y = event.GetMainPosition().GetY(); | |
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54 |
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55 // In the range [-1,1] |
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56 double dy = static_cast<double>(y - clickY_) * normalization_; |
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57 |
| 596 | 58 double z; |
| 59 | |
| 60 // Linear interpolation from [-1, 1] to [MIN_ZOOM, MAX_ZOOM] | |
| 61 if (dy < -1.0) | |
| 62 { | |
| 63 z = MIN_ZOOM; | |
| 64 } | |
| 65 else if (dy > 1.0) | |
| 66 { | |
| 67 z = MAX_ZOOM; | |
| 68 } | |
| 69 else | |
| 70 { | |
| 71 z = MIN_ZOOM + (MAX_ZOOM - MIN_ZOOM) * (dy + 1.0) / 2.0; | |
| 72 } | |
| 73 | |
| 74 double zoom = pow(2.0, z); | |
| 75 | |
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76 GetController()->SetSceneToCanvasTransform( |
| 596 | 77 AffineTransform2D::Combine( |
| 78 AffineTransform2D::CreateScaling(zoom, zoom), | |
| 79 originalSceneToCanvas_)); | |
| 80 | |
| 81 aligner_.Apply(); | |
| 82 } | |
| 83 } | |
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84 |
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85 void ZoomSceneTracker::Cancel() |
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86 { |
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parents:
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87 GetController()->SetSceneToCanvasTransform(originalSceneToCanvas_); |
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parents:
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88 } |
| 596 | 89 } |