我正在使用QTableView和QStandardItemModel来显示一些数据。
对于每一行,都有一个带有复选框的列,此复选框由setItem插入,代码如下:
int rowNum;
QStandardItemModel *tableModel;
QStandardItem* __tmpItem = new QStandardItem();
__tmpItem->setCheckable(true);
__tmpItem->setCheckState(Qt::Unchecked);
tableModel->setItem(rowNum,0,__tmpItem);
现在我想与复选框进行交互。如果复选框由用户更改其状态(从已选中更改为未选中,反之亦然),我想在相应的数据行上执行某些操作。
我知道我可以使用信号槽来捕捉复选框的变化,但由于有很多数据行,我不想逐一连接每一行。
有没有更有效地与支票行动互动?谢谢:))
答案 0 :(得分:4)
我没有处理QTableView + QStandardItemModel,但下面的示例可以帮助您:
1)。 table.h文件:
#ifndef TABLE__H
#define TABLE__H
#include <QtGui>
class ItemDelegate : public QItemDelegate
{
public:
ItemDelegate(QObject *parent = 0)
: QItemDelegate(parent)
{
}
virtual void drawCheck(QPainter *painter, const QStyleOptionViewItem &option,
const QRect &, Qt::CheckState state) const
{
const int textMargin = QApplication::style()->pixelMetric(QStyle::PM_FocusFrameHMargin) + 1;
QRect checkRect = QStyle::alignedRect(option.direction, Qt::AlignCenter,
check(option, option.rect, Qt::Checked).size(),
QRect(option.rect.x() + textMargin, option.rect.y(),
option.rect.width() - (textMargin * 2), option.rect.height()));
QItemDelegate::drawCheck(painter, option, checkRect, state);
}
virtual bool editorEvent(QEvent *event, QAbstractItemModel *model, const QStyleOptionViewItem &option,
const QModelIndex &index)
{
Q_ASSERT(event);
Q_ASSERT(model);
// make sure that the item is checkable
Qt::ItemFlags flags = model->flags(index);
if (!(flags & Qt::ItemIsUserCheckable) || !(flags & Qt::ItemIsEnabled))
return false;
// make sure that we have a check state
QVariant value = index.data(Qt::CheckStateRole);
if (!value.isValid())
return false;
// make sure that we have the right event type
if (event->type() == QEvent::MouseButtonRelease) {
const int textMargin = QApplication::style()->pixelMetric(QStyle::PM_FocusFrameHMargin) + 1;
QRect checkRect = QStyle::alignedRect(option.direction, Qt::AlignCenter,
check(option, option.rect, Qt::Checked).size(),
QRect(option.rect.x() + textMargin, option.rect.y(),
option.rect.width() - (2 * textMargin), option.rect.height()));
if (!checkRect.contains(static_cast<QMouseEvent*>(event)->pos()))
return false;
} else if (event->type() == QEvent::KeyPress) {
if (static_cast<QKeyEvent*>(event)->key() != Qt::Key_Space
&& static_cast<QKeyEvent*>(event)->key() != Qt::Key_Select)
return false;
} else {
return false;
}
Qt::CheckState state = (static_cast<Qt::CheckState>(value.toInt()) == Qt::Checked
? Qt::Unchecked : Qt::Checked);
QMessageBox::information(0,
QString((state == Qt::Checked) ? "Qt::Checked" : "Qt::Unchecked"),
QString("[%1/%2]").arg(index.row()).arg(index.column()));
return model->setData(index, state, Qt::CheckStateRole);
}
virtual void drawFocus(QPainter *painter, const QStyleOptionViewItem &option, const QRect &rect) const
{
QItemDelegate::drawFocus(painter, option, option.rect);
}
};
static int ROWS = 3;
static int COLS = 1;
class Table : public QTableWidget
{
Q_OBJECT
public:
Table(QWidget *parent = 0)
: QTableWidget(ROWS, COLS, parent)
{
setItemDelegate(new ItemDelegate(this));
QTableWidgetItem *item = 0;
for (int i=0; i<rowCount(); ++i) {
for (int j=0; j<columnCount(); ++j) {
setItem(i, j, item = new QTableWidgetItem);
item->setFlags(Qt::ItemIsEnabled|Qt::ItemIsUserCheckable);
item->setCheckState((i+j) % 2 == 0 ? Qt::Checked : Qt::Unchecked);
}
}
}
};
#endif
2)。 main.cpp文件:
#include <QApplication>
#include "table.h"
int main(int argc, char **argv)
{
QApplication a(argc, argv);
Table w;
w.show();
return a.exec();
}
祝你好运。
PS:这是原始text。
答案 1 :(得分:3)
处理click事件,在那里你将获得modelindex,获取数据并修改相同的
如果您要插入多个文字或图标,则需要为列表视图设置委托
答案 2 :(得分:1)
以下是 mosg 使用 QStyleItemDelegate 建议的示例的另一个类似概念。 http://developer.qt.nokia.com/faq/answer/how_can_i_align_the_checkboxes_in_a_view
答案 3 :(得分:0)
在点击的插槽和 index.data(Qt::CheckStateRole)
上使用:
void MainWindow::on_tableView_clicked(const QModelIndex &index)
{
if(index.column() == 2){
if(index.data(Qt::CheckStateRole) == Qt::Checked){
//your code
}else if(index.data(Qt::CheckStateRole) == Qt::Unchecked){
//your code
}
}
//get other infos
QVariant value = index.sibling(index.row(),0).data();
QString selectedMessageName = value.toString();
}