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
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:
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(); - }