Mercurial > hg > orthanc-stone
diff Framework/Widgets/WidgetBase.cpp @ 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 | ff1e935768e7 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Framework/Widgets/WidgetBase.cpp Fri Oct 14 15:34:11 2016 +0200 @@ -0,0 +1,190 @@ +/** + * 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/>. + **/ + + +#include "WidgetBase.h" + +#include "../Orthanc/Core/OrthancException.h" +#include "../Orthanc/Core/Images/ImageProcessing.h" +#include "../Orthanc/Core/Logging.h" + +namespace OrthancStone +{ + void WidgetBase::ClearBackgroundOrthanc(Orthanc::ImageAccessor& target) const + { + // Clear the background using Orthanc + + if (backgroundCleared_) + { + Orthanc::ImageProcessing::Set(target, + backgroundColor_[0], + backgroundColor_[1], + backgroundColor_[2], + 255 /* alpha */); + } + } + + + void WidgetBase::ClearBackgroundCairo(CairoContext& context) const + { + // Clear the background using Cairo + + if (IsBackgroundCleared()) + { + uint8_t red, green, blue; + GetBackgroundColor(red, green, blue); + + context.SetSourceColor(red, green, blue); + cairo_paint(context.GetObject()); + } + } + + + void WidgetBase::ClearBackgroundCairo(Orthanc::ImageAccessor& target) const + { + CairoSurface surface(target); + CairoContext context(surface); + ClearBackgroundCairo(context); + } + + + void WidgetBase::NotifyChange() + { + observers_.NotifyChange(this); + } + + + void WidgetBase::UpdateStatusBar(const std::string& message) + { + if (statusBar_ != NULL) + { + statusBar_->SetMessage(message); + } + } + + + void WidgetBase::WorkerThread(WidgetBase* that) + { + while (that->started_) + { + that->UpdateStep(); + } + } + + + WidgetBase::WidgetBase() : + statusBar_(NULL), + started_(false), + backgroundCleared_(false) + { + backgroundColor_[0] = 0; + backgroundColor_[1] = 0; + backgroundColor_[2] = 0; + } + + + void WidgetBase::SetBackgroundColor(uint8_t red, + uint8_t green, + uint8_t blue) + { + backgroundColor_[0] = red; + backgroundColor_[1] = green; + backgroundColor_[2] = blue; + } + + void WidgetBase::GetBackgroundColor(uint8_t& red, + uint8_t& green, + uint8_t& blue) const + { + red = backgroundColor_[0]; + green = backgroundColor_[1]; + blue = backgroundColor_[2]; + } + + + void WidgetBase::Register(IChangeObserver& observer) + { + observers_.Register(observer); + } + + + void WidgetBase::Unregister(IChangeObserver& observer) + { + observers_.Unregister(observer); + } + + + void WidgetBase::Start() + { + if (started_) + { + LOG(ERROR) << "Cannot Start() twice"; + throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); + } + + started_ = true; + + if (HasUpdateThread()) + { + thread_ = boost::thread(WorkerThread, this); + } + } + + + void WidgetBase::Stop() + { + if (!started_) + { + LOG(ERROR) << "Cannot Stop() if Start() has not been invoked"; + throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); + } + + started_ = false; + + if (HasUpdateThread() && + thread_.joinable()) + { + thread_.join(); + } + } + + + bool WidgetBase::Render(Orthanc::ImageAccessor& surface) + { +#if 0 + ClearBackgroundOrthanc(surface); +#else + ClearBackgroundCairo(surface); // Faster than Orthanc +#endif + + return true; + } +}