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add lazy loading to headwords dialog
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,88 @@ | ||
| #include "headwordslistmodel.h" | ||
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| HeadwordListModel::HeadwordListModel(QObject *parent) | ||
| : QAbstractListModel(parent), wordsCount(0) | ||
| {} | ||
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| int HeadwordListModel::rowCount(const QModelIndex &parent) const | ||
| { | ||
| return parent.isValid() ? 0 : wordsCount; | ||
| } | ||
|
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| int HeadwordListModel::totalCount() const{ | ||
| return totalSize; | ||
| } | ||
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| bool HeadwordListModel::isFinish() const{ | ||
| return wordsCount >=totalSize; | ||
| } | ||
|
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| QString HeadwordListModel::getRow(int row) | ||
| { | ||
| if(fileSortedList.empty()){ | ||
| fileSortedList<<fileList; | ||
| fileSortedList.sort(); | ||
| } | ||
| return fileSortedList.at(row); | ||
| } | ||
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| int HeadwordListModel::wordCount() const{ | ||
| return wordsCount; | ||
| } | ||
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| QVariant HeadwordListModel::data(const QModelIndex &index, int role) const | ||
| { | ||
| if (!index.isValid()) | ||
| return QVariant(); | ||
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| if (index.row() >= totalSize || index.row() < 0) | ||
| return QVariant(); | ||
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| if (role == Qt::DisplayRole) { | ||
| return fileList.at(index.row()); | ||
| } | ||
| return QVariant(); | ||
| } | ||
|
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| bool HeadwordListModel::canFetchMore(const QModelIndex &parent) const | ||
| { | ||
| if (parent.isValid()) | ||
| return false; | ||
| return (wordsCount < totalSize); | ||
| } | ||
|
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| void HeadwordListModel::fetchMore(const QModelIndex &parent) | ||
| { | ||
| if (parent.isValid()) | ||
| return; | ||
| int remainder = fileList.size() - wordsCount; | ||
| int itemsToFetch = qMin(100, remainder); | ||
|
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| if (itemsToFetch <= 0) | ||
| return; | ||
|
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| beginInsertRows(QModelIndex(), wordsCount, wordsCount + itemsToFetch - 1); | ||
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| wordsCount+= itemsToFetch; | ||
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| endInsertRows(); | ||
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| emit numberPopulated(wordsCount); | ||
| } | ||
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| void HeadwordListModel::setDict(Dictionary::Class * dict){ | ||
| _dict = dict; | ||
| totalSize = _dict->getWordCount(); | ||
| wordsCount=0; | ||
| QThreadPool::globalInstance()->start( | ||
| [ this ]() | ||
| { | ||
| beginResetModel(); | ||
| _dict->getHeadwords( fileList ); | ||
| totalSize = fileList.size(); | ||
| emit finished(totalSize); | ||
| endResetModel(); | ||
| } ); | ||
|
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| } | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,42 @@ | ||
| #ifndef HEADWORDSLISTMODEL_H | ||
| #define HEADWORDSLISTMODEL_H | ||
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| #include "dictionary.hh" | ||
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| #include <QAbstractListModel> | ||
| #include <QStringList> | ||
|
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| class HeadwordListModel : public QAbstractListModel | ||
| { | ||
| Q_OBJECT | ||
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| public: | ||
| HeadwordListModel(QObject *parent = nullptr); | ||
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| int rowCount(const QModelIndex &parent = QModelIndex()) const override; | ||
| int totalCount() const; | ||
| int wordCount() const; | ||
| bool isFinish() const; | ||
| QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override; | ||
| QString getRow(int row); | ||
| signals: | ||
| void numberPopulated(int number); | ||
| void finished(int number); | ||
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| public slots: | ||
| void setDict(Dictionary::Class * dict); | ||
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| protected: | ||
| bool canFetchMore(const QModelIndex &parent) const override; | ||
| void fetchMore(const QModelIndex &parent) override; | ||
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| private: | ||
| QStringList fileList; | ||
| QStringList fileSortedList; | ||
| long wordsCount; | ||
| long totalSize; | ||
| Dictionary::Class * _dict; | ||
| }; | ||
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| #endif // HEADWORDSLISTMODEL_H |