Mercurial > hg > orthanc-stone
diff OrthancStone/Sources/Viewport/WebAssemblyViewport.cpp @ 1512:244ad1e4e76a
reorganization of folders
author | Sebastien Jodogne <s.jodogne@gmail.com> |
---|---|
date | Tue, 07 Jul 2020 16:21:02 +0200 |
parents | Framework/Viewport/WebAssemblyViewport.cpp@6e43cac7833c |
children | a48ae10857b1 |
line wrap: on
line diff
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/OrthancStone/Sources/Viewport/WebAssemblyViewport.cpp Tue Jul 07 16:21:02 2020 +0200 @@ -0,0 +1,339 @@ +/** + * Stone of Orthanc + * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics + * Department, University Hospital of Liege, Belgium + * Copyright (C) 2017-2020 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 "WebAssemblyViewport.h" + +#include "../Toolbox/GenericToolbox.h" + +#include <OrthancException.h> + +#include <boost/make_shared.hpp> +#include <boost/enable_shared_from_this.hpp> + +namespace OrthancStone +{ + static void ConvertMouseEvent(PointerEvent& target, + const EmscriptenMouseEvent& source, + const ICompositor& compositor) + { + int x = static_cast<int>(source.targetX); + int y = static_cast<int>(source.targetY); + + switch (source.button) + { + case 0: + target.SetMouseButton(MouseButton_Left); + break; + + case 1: + target.SetMouseButton(MouseButton_Middle); + break; + + case 2: + target.SetMouseButton(MouseButton_Right); + break; + + default: + target.SetMouseButton(MouseButton_None); + break; + } + + target.AddPosition(compositor.GetPixelCenterCoordinates(x, y)); + target.SetAltModifier(source.altKey); + target.SetControlModifier(source.ctrlKey); + target.SetShiftModifier(source.shiftKey); + } + + + class WebAssemblyViewport::WasmLock : public ILock + { + private: + WebAssemblyViewport& that_; + + public: + WasmLock(WebAssemblyViewport& that) : + that_(that) + { + } + + virtual bool HasCompositor() const ORTHANC_OVERRIDE + { + return that_.compositor_.get() != NULL; + } + + virtual ICompositor& GetCompositor() ORTHANC_OVERRIDE + { + if (that_.compositor_.get() == NULL) + { + throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); + } + else + { + return *that_.compositor_; + } + } + + virtual ViewportController& GetController() ORTHANC_OVERRIDE + { + assert(that_.controller_); + return *that_.controller_; + } + + virtual void Invalidate() ORTHANC_OVERRIDE + { + that_.Invalidate(); + } + }; + + + EM_BOOL WebAssemblyViewport::OnRequestAnimationFrame(double time, void *userData) + { + LOG(TRACE) << __func__; + WebAssemblyViewport* that = reinterpret_cast<WebAssemblyViewport*>(userData); + + if (that->compositor_.get() != NULL && + that->controller_ /* should always be true */) + { + that->Paint(*that->compositor_, *that->controller_); + } + + LOG(TRACE) << "Exiting: " << __func__; + return true; + } + + EM_BOOL WebAssemblyViewport::OnResize(int eventType, const EmscriptenUiEvent *uiEvent, void *userData) + { + LOG(TRACE) << __func__; + WebAssemblyViewport* that = reinterpret_cast<WebAssemblyViewport*>(userData); + + if (that->compositor_.get() != NULL) + { + that->UpdateSize(*that->compositor_); + that->Invalidate(); + } + + LOG(TRACE) << "Exiting: " << __func__; + return true; + } + + + EM_BOOL WebAssemblyViewport::OnMouseDown(int eventType, const EmscriptenMouseEvent *mouseEvent, void *userData) + { + WebAssemblyViewport* that = reinterpret_cast<WebAssemblyViewport*>(userData); + + LOG(TRACE) << "mouse down: " << that->GetCanvasCssSelector(); + + if (that->compositor_.get() != NULL && + that->interactor_.get() != NULL) + { + PointerEvent pointer; + ConvertMouseEvent(pointer, *mouseEvent, *that->compositor_); + + that->controller_->HandleMousePress(*that->interactor_, pointer, + that->compositor_->GetCanvasWidth(), + that->compositor_->GetCanvasHeight()); + that->Invalidate(); + } + + LOG(TRACE) << "Exiting: " << __func__; + return true; + } + + + EM_BOOL WebAssemblyViewport::OnMouseMove(int eventType, const EmscriptenMouseEvent *mouseEvent, void *userData) + { + WebAssemblyViewport* that = reinterpret_cast<WebAssemblyViewport*>(userData); + + if (that->compositor_.get() != NULL && + that->controller_->HasActiveTracker()) + { + PointerEvent pointer; + ConvertMouseEvent(pointer, *mouseEvent, *that->compositor_); + if (that->controller_->HandleMouseMove(pointer)) + { + that->Invalidate(); + } + } + + LOG(TRACE) << "Exiting: " << __func__; + return true; + } + + EM_BOOL WebAssemblyViewport::OnMouseUp(int eventType, const EmscriptenMouseEvent *mouseEvent, void *userData) + { + LOG(TRACE) << __func__; + WebAssemblyViewport* that = reinterpret_cast<WebAssemblyViewport*>(userData); + + if (that->compositor_.get() != NULL) + { + PointerEvent pointer; + ConvertMouseEvent(pointer, *mouseEvent, *that->compositor_); + that->controller_->HandleMouseRelease(pointer); + that->Invalidate(); + } + + LOG(TRACE) << "Exiting: " << __func__; + return true; + } + + void WebAssemblyViewport::Invalidate() + { + emscripten_request_animation_frame(OnRequestAnimationFrame, reinterpret_cast<void*>(this)); + } + + void WebAssemblyViewport::AcquireCompositor(ICompositor* compositor /* takes ownership */) + { + if (compositor == NULL) + { + throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer); + } + else + { + compositor_.reset(compositor); + } + } + +#if DISABLE_DEPRECATED_FIND_EVENT_TARGET_BEHAVIOR == 1 +// everything OK..... we're using the new setting +#else +#pragma message("WARNING: DISABLE_DEPRECATED_FIND_EVENT_TARGET_BEHAVIOR is not defined or equal to 0. Stone will use the OLD Emscripten rules for DOM element selection.") +#endif + + WebAssemblyViewport::WebAssemblyViewport( + const std::string& canvasId, bool enableEmscriptenMouseEvents) : + canvasId_(canvasId), +#if DISABLE_DEPRECATED_FIND_EVENT_TARGET_BEHAVIOR == 1 + canvasCssSelector_("#" + canvasId), +#else + canvasCssSelector_(canvasId), +#endif + interactor_(new DefaultViewportInteractor), + enableEmscriptenMouseEvents_(enableEmscriptenMouseEvents) + { + } + + void WebAssemblyViewport::PostConstructor() + { + boost::shared_ptr<IViewport> viewport = shared_from_this(); + controller_.reset(new ViewportController(viewport)); + + LOG(INFO) << "Initializing Stone viewport on HTML canvas: " + << canvasId_; + + if (canvasId_.empty() || + canvasId_[0] == '#') + { + throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange, + "The canvas identifier must not start with '#'"); + } + + // Disable right-click on the canvas (i.e. context menu) + EM_ASM({ + document.getElementById(UTF8ToString($0)).oncontextmenu = + function(event) + { + event.preventDefault(); + } + }, + canvasId_.c_str() // $0 + ); + + // It is not possible to monitor the resizing of individual + // canvas, so we track the full window of the browser + emscripten_set_resize_callback(EMSCRIPTEN_EVENT_TARGET_WINDOW, + reinterpret_cast<void*>(this), + false, + OnResize); + + if (enableEmscriptenMouseEvents_) + { + + // if any of this function causes an error in the console, please + // make sure you are using the new (as of 1.39.x) version of + // emscripten element lookup rules( pass + // "-s DISABLE_DEPRECATED_FIND_EVENT_TARGET_BEHAVIOR=1" to the linker. + + emscripten_set_mousedown_callback(canvasCssSelector_.c_str(), + reinterpret_cast<void*>(this), + false, + OnMouseDown); + + emscripten_set_mousemove_callback(canvasCssSelector_.c_str(), + reinterpret_cast<void*>(this), + false, + OnMouseMove); + + emscripten_set_mouseup_callback(canvasCssSelector_.c_str(), + reinterpret_cast<void*>(this), + false, + OnMouseUp); + } + } + + void WebAssemblyViewport::UpdateCanvasSize() + { + UpdateSize(*compositor_); + } + + WebAssemblyViewport::~WebAssemblyViewport() + { + emscripten_set_resize_callback(EMSCRIPTEN_EVENT_TARGET_WINDOW, + reinterpret_cast<void*>(this), + false, + NULL); + + if (enableEmscriptenMouseEvents_) + { + + emscripten_set_mousedown_callback(canvasCssSelector_.c_str(), + reinterpret_cast<void*>(this), + false, + NULL); + + emscripten_set_mousemove_callback(canvasCssSelector_.c_str(), + reinterpret_cast<void*>(this), + false, + NULL); + + emscripten_set_mouseup_callback(canvasCssSelector_.c_str(), + reinterpret_cast<void*>(this), + false, + NULL); + } + } + + IViewport::ILock* WebAssemblyViewport::Lock() + { + return new WasmLock(*this); + } + + void WebAssemblyViewport::AcquireInteractor(IViewportInteractor* interactor) + { + if (interactor == NULL) + { + throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer); + } + else + { + interactor_.reset(interactor); + } + } +}