Qt之模型/视图（实时更新数据）

TableView::TableView(QWidget *parent)

: QTableView(parent)

{

this->setAlternatingRowColors(true);

this->setStyleSheet( "QTableView{background-color: rgb(250, 250, 115);"   

"alternate-background-color: rgb(141, 163, 215);}" ); 

this->setSelectionBehavior(QAbstractItemView::SelectRows);

this->horizontalHeader()->setStretchLastSection(true);

this->horizontalHeader()->setHighlightSections(false); 

this->verticalHeader()->setVisible(false);

this->setShowGrid(false);

this->setEditTriggers(QAbstractItemView::NoEditTriggers);

this->setSelectionMode(QAbstractItemView::ExtendedSelection);

    model = new TableModel();

    this->setModel(model);

    this->initHeader();

    model->setModalDatas(&grid_data_list);

    progressbar_delegate = new ProgressBarDelegate();

    this->setItemDelegate(progressbar_delegate);

connect(model, &TableModel::updateCount, this, &TableView::updateCount);

    this->initHeader();

}

TableView::~TableView(void)

{

    if(progressbar_delegate) {

        delete progressbar_delegate;

        progressbar_delegate = NULL;

    }

    if(model) {

        delete model;

        model = NULL;

    }

    grid_data_list.clear();

}

void TableView::addRow(QStringList rowList)

{

    grid_data_list.append(rowList);

    model->refrushModel();

}

void TableView::remove()

{

QModelIndexList model_index_list = this->selectedIndexes();

int model_count = model_index_list.count();

if(model_count <= 0)

return;

QList list_row;

for(int i=model_count-1; i>=0; i--)

{

QModelIndex model_index = model_index_list.at(i);

int row = model_index.row();

if(!list_row.contains(row))

list_row.append(row);

}

if(list_row.isEmpty())

return;

qSort(list_row);

for(int i=list_row.count()-1; i>=0; i--)

{

grid_data_list.removeAt(list_row.at(i));

}

model->refrushModel();

}

void TableView::clear()

{

grid_data_list.clear();

model->refrushModel();

}

int TableView::rowCount()

{

return model->rowCount(QModelIndex());

}

void TableView::initHeader()

{

    QStringList header;

    header << tr("name") << tr("size") << tr("progress") << tr("speed") << tr("left time") << tr("state");

    model->setHorizontalHeaderList(header);

}

void TableView::changeValue()

{

//这里以10行尾列进行更新

int row_count = this->rowCount();

if(row_count < 10)

return;

for(int i=0; i<10; i++)

{

QStringList file_list = grid_data_list.at(i);

int progress = rand()0;

QStringList row_list;

row_list <<  file_list.at(0) << file_list.at(1) << QString::number(progress) << file_list.at(3) << file_list.at(4) << file_list.at(5);

grid_data_list.replace(i, row_list);

}

model->refrushModel();

}