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40 lines
1.5 KiB
C++
40 lines
1.5 KiB
C++
#include "nmVolumeImportTask.h"
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#include "nmVolumeDataImporter.h"
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nmVolumeImportTask::nmVolumeImportTask(const QString& sFilePath, QObject* pParent)
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: QThread(pParent), m_sFilePath(sFilePath), m_nCancelRequested(0), m_nLastProgress(-1)
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{
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}
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nmVolumeImportTask::~nmVolumeImportTask()
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{
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// 析构是最后一道生命周期保护，不允许销毁仍在执行 VTK 代码的线程。
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requestCancel();
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wait();
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}
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void nmVolumeImportTask::requestCancel() { m_nCancelRequested.fetchAndStoreRelease(1); }
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bool nmVolumeImportTask::isCanceled() const { return m_nCancelRequested.fetchAndAddAcquire(0) != 0; }
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void nmVolumeImportTask::reportProgress(int nPercent)
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{
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nPercent = qBound(0, nPercent, 100);
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if(nPercent > m_nLastProgress) {
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m_nLastProgress = nPercent;
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emit progressChanged(nPercent);
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}
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}
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void nmVolumeImportTask::run()
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{
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try {
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m_pResult = nmVolumeDataImporter::loadFile(m_sFilePath, &m_sError, this);
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} catch(...) {
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// C++ 异常不得越过 QThread::run 边界，否则一次导入可能终止整个进程。
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m_pResult.clear();
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m_sError = tr("An unexpected error occurred while importing the volume mesh.");
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}
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if(isCanceled()) m_pResult.clear();
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}
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QSharedPointer<const nmVolumeData> nmVolumeImportTask::getResult() const
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{
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return isFinished() && !isCanceled() ? m_pResult : QSharedPointer<const nmVolumeData>();
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}
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QString nmVolumeImportTask::getError() const { return isFinished() ? m_sError : QString(); }
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