Mercurial > hg > orthanc-stone
diff Framework/Toolbox/ViewportGeometry.h @ 0:351ab0da0150
initial commit
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Fri, 14 Oct 2016 15:34:11 +0200 |
parents | |
children | 7207a407bcd8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Framework/Toolbox/ViewportGeometry.h Fri Oct 14 15:34:11 2016 +0200 @@ -0,0 +1,115 @@ +/** + * Stone of Orthanc + * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics + * Department, University Hospital of Liege, Belgium + * + * This program is free software: you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation, either version 3 of the + * License, or (at your option) any later version. + * + * In addition, as a special exception, the copyright holders of this + * program give permission to link the code of its release with the + * OpenSSL project's "OpenSSL" library (or with modified versions of it + * that use the same license as the "OpenSSL" library), and distribute + * the linked executables. You must obey the GNU General Public License + * in all respects for all of the code used other than "OpenSSL". If you + * modify file(s) with this exception, you may extend this exception to + * your version of the file(s), but you are not obligated to do so. If + * you do not wish to do so, delete this exception statement from your + * version. If you delete this exception statement from all source files + * in the program, then also delete it here. + * + * 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 + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + **/ + + +#pragma once + +#include "../Viewport/CairoContext.h" + +namespace OrthancStone +{ + // Not thread-safe + class ViewportGeometry + { + private: + // Extent of the scene (in world units) + double x1_; + double y1_; + double x2_; + double y2_; + + // Size of the display (in pixels) + unsigned int width_; + unsigned int height_; + + // Zoom/pan + double zoom_; + double panX_; // In pixels (display units) + double panY_; + + cairo_matrix_t transform_; // Scene-to-display transformation + + void ComputeTransform(); + + public: + ViewportGeometry(); + + void SetDisplaySize(unsigned int width, + unsigned int height); + + void SetSceneExtent(double x1, + double y1, + double x2, + double y2); + + void GetSceneExtent(double& x1, + double& y1, + double& x2, + double& y2) const; + + void MapDisplayToScene(double& sceneX /* out */, + double& sceneY /* out */, + double x, + double y) const; + + void MapSceneToDisplay(int& displayX /* out */, + int& displayY /* out */, + double x, + double y) const; + + unsigned int GetDisplayWidth() const + { + return width_; + } + + unsigned int GetDisplayHeight() const + { + return height_; + } + + double GetZoom() const + { + return zoom_; + } + + void SetDefaultView(); + + void ApplyTransform(CairoContext& context) const; + + void GetPan(double& x, + double& y) const; + + void SetPan(double x, + double y); + + void SetZoom(double zoom); + }; +}