Added a new class for dealing with comics selection in comics views.

YACReaderLibrary/yacreader_comics_selection_helper.cpp

@@ -0,0 +1,127 @@
+#include "yacreader_comics_selection_helper.h"
+
+#include "comic_model.h"
+
+YACReaderComicsSelectionHelper::YACReaderComicsSelectionHelper(QObject *parent) : QObject(parent), _selectionModel(nullptr)
+{
+
+}
+
+void YACReaderComicsSelectionHelper::setModel(ComicModel *model)
+{
+    if(model == NULL)
+        return;
+
+    this->model = model;
+
+    if(_selectionModel != nullptr)
+        delete _selectionModel;
+
+    _selectionModel = new QItemSelectionModel(model);
+}
+
+void YACReaderComicsSelectionHelper::selectIndex(int index)
+{
+    if(_selectionModel != nullptr && model!=NULL)
+    {
+        _selectionModel->select(model->index(index,0),QItemSelectionModel::Select | QItemSelectionModel::Rows);
+
+        emit selectionChanged();
+    }
+}
+
+void YACReaderComicsSelectionHelper::deselectIndex(int index)
+{
+    if(_selectionModel != nullptr && model!=NULL)
+    {
+        _selectionModel->select(model->index(index,0),QItemSelectionModel::Deselect | QItemSelectionModel::Rows);
+
+        emit selectionChanged();
+    }
+}
+
+bool YACReaderComicsSelectionHelper::isSelectedIndex(int index) const
+{
+    if(_selectionModel != nullptr && model!=NULL)
+    {
+        QModelIndex mi = model->index(index,0);
+        return _selectionModel->isSelected(mi);
+    }
+    return false;
+}
+
+void YACReaderComicsSelectionHelper::clear()
+{
+    if(_selectionModel != nullptr)
+    {
+        _selectionModel->clear();
+
+        emit selectionChanged();
+    }
+}
+
+QModelIndex YACReaderComicsSelectionHelper::currentIndex()
+{
+    if(!_selectionModel)
+        return QModelIndex();
+
+    QModelIndexList indexes = _selectionModel->selectedRows();
+    if(indexes.length()>0)
+        return indexes[0];
+
+    this->selectIndex(0);
+    indexes = _selectionModel->selectedRows();
+    if(indexes.length()>0)
+        return indexes[0];
+    else
+        return QModelIndex();
+}
+
+void YACReaderComicsSelectionHelper::selectAll()
+{
+    QModelIndex top = model->index(0, 0);
+    QModelIndex bottom = model->index(model->rowCount()-1, 0);
+    QItemSelection selection(top, bottom);
+    _selectionModel->select(selection, QItemSelectionModel::Select | QItemSelectionModel::Rows);
+
+    emit selectionChanged();
+}
+
+QModelIndexList YACReaderComicsSelectionHelper::selectedRows(int column) const
+{
+    return _selectionModel->selectedRows(column);
+}
+
+QList<QModelIndex> YACReaderComicsSelectionHelper::selectedIndexes() const
+{
+    return _selectionModel->selectedIndexes();
+}
+
+int YACReaderComicsSelectionHelper::numItemsSelected() const
+{
+    if(_selectionModel != nullptr)
+    {
+        return _selectionModel->selectedRows().length();
+    }
+
+    return 0;
+}
+
+int YACReaderComicsSelectionHelper::lastSelectedIndex() const
+{
+    if(_selectionModel != nullptr)
+    {
+        return _selectionModel->selectedRows().last().row();
+    }
+
+    return -1;
+}
+
+QItemSelectionModel *YACReaderComicsSelectionHelper::selectionModel()
+{
+    QModelIndexList indexes = _selectionModel->selectedRows();
+    if(indexes.length()==0)
+        this->selectIndex(0);
+
+    return _selectionModel;
+}

YACReaderLibrary/yacreader_comics_selection_helper.h

@@ -0,0 +1,41 @@
+#ifndef YACREADERCOMICSSELECTIONHELPER_H
+#define YACREADERCOMICSSELECTIONHELPER_H
+
+#include <QObject>
+#include <QtWidgets>
+
+class ComicModel;
+
+class YACReaderComicsSelectionHelper : public QObject
+{
+    Q_OBJECT
+public:
+    explicit YACReaderComicsSelectionHelper(QObject *parent = 0);
+
+    void setModel(ComicModel *model);
+
+    Q_INVOKABLE void selectIndex(int index);
+    Q_INVOKABLE void deselectIndex(int index);
+    Q_INVOKABLE bool isSelectedIndex(int index) const;
+    Q_INVOKABLE void clear();
+    Q_INVOKABLE int numItemsSelected() const;
+    Q_INVOKABLE int lastSelectedIndex() const;
+    Q_INVOKABLE QModelIndex currentIndex();
+    Q_INVOKABLE void selectAll();
+    Q_INVOKABLE QModelIndexList selectedIndexes() const;
+    Q_INVOKABLE QModelIndexList selectedRows(int column = 0) const;
+
+    QItemSelectionModel * selectionModel();
+
+signals:
+    void selectionChanged();
+
+public slots:
+
+protected:
+    QItemSelectionModel * _selectionModel;
+
+    ComicModel * model;
+};
+
+#endif // YACREADERCOMICSSELECTIONHELPER_H