QT的MVC(View/Delegate)模型十分强大,可以利用各种控件来对表格的输入进行限制,不过我以前一直没有过,这几天研究了一下,写个小例子,希望大家喜欢。
如果看不懂这个例子,请先看QT的自带例子:http://qt-project.org/doc/qt-4.8/itemviews-spinboxdelegate.html
思路:
1:为每一列定义委托:
A:第一列是编号列,使用只读委托,令该列的单元格是只读的
B:第三列是ID列,只能输入1-12个数字,利用QLineEdit委托和正则表达式对输入进行限制
C:第四年龄列,利用QSpinBox委托进行输入限制,只能输入1-100之间的数字
D:第五列是性别列,利用QComboBox委托对输入进行限制,该列的单元格只能输入Male或Female
E:第六列是头像列,在该列的单元格中央放置一张头像
2:定义代理类,把所有单元格中的字符居中显示。
3:利用QSS,将表格的背景色弄成黄蓝相间。
截图:
上代码:
-
- #include <QtGui>
- //编号列,只读委托
- //这个方法我还真想不到,呵呵
- class ReadOnlyDelegate : public QItemDelegate
- {
- Q_OBJECT
- public:
- ReadOnlyDelegate(QObject *parent = 0): QItemDelegate(parent) { }
- QWidget *createEditor(QWidget*parent, const QStyleOptionViewItem &option,
- const QModelIndex &index) const
- {
- return NULL;
- }
- };
- //ID列,只能输入1-12个数字
- //利用QLineEdit委托和正则表达式对输入进行限制
- class UserIDDelegate : public QItemDelegate
- {
- Q_OBJECT
- public:
- UserIDDelegate(QObject *parent = 0): QItemDelegate(parent) { }
- QWidget *createEditor(QWidget *parent, const QStyleOptionViewItem &option,
- const QModelIndex &index) const
- {
- QLineEdit *editor = new QLineEdit(parent);
- QRegExp regExp("[0-9]{0,10}");
- editor->setValidator(new QRegExpValidator(regExp, parent));
- return editor;
- }
- void setEditorData(QWidget *editor, const QModelIndex &index) const
- {
- QString text = index.model()->data(index, Qt::EditRole).toString();
- QLineEdit *lineEdit = static_cast<QLineEdit*>(editor);
- lineEdit->setText(text);
- }
- void setModelData(QWidget *editor, QAbstractItemModel *model,
- const QModelIndex &index) const
- {
- QLineEdit *lineEdit = static_cast<QLineEdit*>(editor);
- QString text = lineEdit->text();
- model->setData(index, text, Qt::EditRole);
- }
- void updateEditorGeometry(QWidget *editor,
- const QStyleOptionViewItem &option, const QModelIndex &index) const
- {
- editor->setGeometry(option.rect);
- }
- };
- //年龄列,利用QSpinBox委托进行输入限制,只能输入1-100之间的数字
- class AgeDelegate : public QItemDelegate
- {
- Q_OBJECT
- public:
- AgeDelegate(QObject *parent = 0): QItemDelegate(parent) { }
- QWidget *createEditor(QWidget *parent, const QStyleOptionViewItem &option,
- const QModelIndex &index) const
- {
- QSpinBox *editor = new QSpinBox(parent);
- editor->setMinimum(1);
- editor->setMaximum(100);
- return editor;
- }
- void setEditorData(QWidget *editor, const QModelIndex &index) const
- {
- int value = index.model()->data(index, Qt::EditRole).toInt();
- QSpinBox *spinBox = static_cast<QSpinBox*>(editor);
- spinBox->setValue(value);
- }
- void setModelData(QWidget *editor, QAbstractItemModel *model,
- const QModelIndex &index) const
- {
- QSpinBox *spinBox = static_cast<QSpinBox*>(editor);
- spinBox->interpretText();
- int value = spinBox->value();
- model->setData(index, value, Qt::EditRole);
- }
- void updateEditorGeometry(QWidget *editor,
- const QStyleOptionViewItem &option, const QModelIndex &index) const
- {
- editor->setGeometry(option.rect);
- }
- };
- //性别列,利用QComboBox委托对输入进行限制
- //这一列的单元格只能输入Male或Female
- class SexDelegate : public QItemDelegate
- {
- Q_OBJECT
- public:
- SexDelegate(QObject *parent = 0): QItemDelegate(parent) { }
- QWidget *createEditor(QWidget *parent, const QStyleOptionViewItem &option,
- const QModelIndex &index) const
- {
- QComboBox *editor = new QComboBox(parent);
- editor->addItem("Female");
- editor->addItem("Male");
- return editor;
- }
- void setEditorData(QWidget *editor, const QModelIndex &index) const
- {
- QString text = index.model()->data(index, Qt::EditRole).toString();
- QComboBox *comboBox = static_cast<QComboBox*>(editor);
- int tindex = comboBox->findText(text);
- comboBox->setCurrentIndex(tindex);
- }
- void setModelData(QWidget *editor, QAbstractItemModel *model,
- const QModelIndex &index) const
- {
- QComboBox *comboBox = static_cast<QComboBox*>(editor);
- QString text = comboBox->currentText();
- model->setData(index, text, Qt::EditRole);
- }
- void updateEditorGeometry(QWidget *editor,
- const QStyleOptionViewItem &option, const QModelIndex &index) const
- {
- editor->setGeometry(option.rect);
- }
- };
- //头像列,只是在单元格中央放一张小图而已
- class IconDelegate : public QItemDelegate
- {
- Q_OBJECT
- public:
- IconDelegate(QObject *parent = 0): QItemDelegate(parent) { }
- void paint(QPainter *painter, const QStyleOptionViewItem &option,
- const QModelIndex & index ) const
- {
- //show.bmp是在工程目录中的一张图片(其实就是QQ的图标啦,呵呵)
- QPixmap pixmap = QPixmap("show.bmp").scaled(24, 24);
- qApp->style()->drawItemPixmap(painter, option.rect, Qt::AlignCenter, QPixmap(pixmap));
- }
- };
- //代理类,把所有单元格中的字符居中显示
- class VIPModel : public QStandardItemModel
- {
- Q_OBJECT
- public:
- VIPModel(QObject *parent=NULL) : QStandardItemModel(parent) { }
- VIPModel(int row, int column, QObject *parent=NULL)
- : QStandardItemModel(row, column, parent) { }
- QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const
- {
- if( Qt::TextAlignmentRole == role )
- return Qt::AlignCenter;
- return QStandardItemModel::data(index, role);
- }
- };
- #include "main.moc"
- int main(int argc, char *argv[])
- {
- QApplication app(argc, argv);
- VIPModel *model = new VIPModel(5, 5);
- QTableView *tableView = new QTableView;
- //把表格的背景调成黄蓝相间
- //这种方法是在网上看到的,用起来还真方便啊
- tableView->setAlternatingRowColors(true);
- tableView->setStyleSheet("QTableView{background-color: rgb(250, 250, 115);"
- "alternate-background-color: rgb(141, 163, 215);}");
- tableView->setWindowTitle("VIP List");
- tableView->resize(700, 400);
- tableView->setModel(model);
- QStringList headerList;
- headerList << "No." << "ID" << "Name" << "Age" << "Sex" << "Show";
- model->setHorizontalHeaderLabels(headerList);
- tableView->verticalHeader()->setVisible(false);
- tableView->horizontalHeader()->setStretchLastSection(true);
- //为每一列加载委托
- ReadOnlyDelegate readOnlyDelegate;
- tableView->setItemDelegateForColumn(0, &readOnlyDelegate);
- UserIDDelegate userIDDelegate;
- tableView->setItemDelegateForColumn(1, &userIDDelegate);
- AgeDelegate spinBoxDelegate;
- tableView->setItemDelegateForColumn(3, &spinBoxDelegate);
- SexDelegate comboBoxDelegate;
- tableView->setItemDelegateForColumn(4, &comboBoxDelegate);
- IconDelegate iconDelegate;
- tableView->setItemDelegateForColumn(5, &iconDelegate);
- for(int i=0; i<10; i++)
- {
- QModelIndex index = model->index(i, 0, QModelIndex());
- model->setData(index, i);
- }
- tableView->show();
- return app.exec();
- }