python tableview绑定字典_在QTableView中使用各种自定义委托

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

//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(editor);

lineEdit->setText(text);

}

void setModelData(QWidget *editor, QAbstractItemModel *model,

const QModelIndex &index) const

{

QLineEdit *lineEdit = static_cast(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(editor);

spinBox->setValue(value);

}

void setModelData(QWidget *editor, QAbstractItemModel *model,

const QModelIndex &index) const

{

QSpinBox *spinBox = static_cast(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(editor);

int tindex = comboBox->findText(text);

comboBox->setCurrentIndex(tindex);

}

void setModelData(QWidget *editor, QAbstractItemModel *model,

const QModelIndex &index) const

{

QComboBox *comboBox = static_cast(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); //我用了会报错

tableView->setItemDelegateForColumn(0, new ReadonlyDelegate(this)); //我用的是这种

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();

}

QTableView、QStandardItemModel/QAbstractItemModel 、QStyledItemDelegate/QItemDelegate和QModelIndex;

先上图看效果吧

选择文件按钮这一列，第0行是点击后进入编辑模式时显示按钮的情况。

下面一行是显示的选择文件的全路径。

第2行”C:“是初始化时设置的值，只是为了测试显示。

最后一行是没有选择文件。

我实现的这个SelectFileButton办法：

QPushButton；

SelectFileButton里实现一个槽函数：功能，点击时选择文件并返回路径。

cQItemDelegate；

d、然后再重写createEditor()；返回SelectFileButton的指针

e、重写setModelData()、setEditorData()；设置模型数据和设置编辑数据的。

#ifndef SELECTFILEBUTTONDELEGATE_H

#define SELECTFILEBUTTONDELEGATE_H

#include

class TableModel;

class SelectFileButton: public QPushButton

{

Q_OBJECT

public:

SelectFileButton(const QModelIndex & index, QWidget *parent = 0)

:QPushButton(parent)

{

Init(index);

}

SelectFileButton(const QModelIndex & index, const QString &text, QWidget *parent = 0)

: QPushButton(text, parent)

{

Init(index);

}

SelectFileButton(const QModelIndex & index, const QIcon& icon, const QString &text, QWidget *parent = 0)

:QPushButton(icon, text, parent)

{

Init(index);

}

~SelectFileButton() {

qDebug() << "~SelectFileButton";

}

protected:

void Init(const QModelIndex & index)

{

m_index = index;

connect(this, SIGNAL(clicked()), this, SLOT(btnClick_slot()));

}

public slots:

void btnClick_slot()

{

QString strValue;

QModelIndex index = this->m_index;

QFileDialog * dlg = new QFileDialog(0);

int res =dlg->exec(); //这里开启新的线程，顶层会释放这个按钮，所以要把Index 保存一份

if (res==QFileDialog::Accepted)

{

strValue = dlg->selectedFiles()[0];

QAbstractItemModel* model = const_cast(index.model());

model->setData(index, strValue);

}

private:

QModelIndex m_index;

};

/**********************************************************************/

class SelectFileButtonDelegate : public QItemDelegate

{

Q_OBJECT

public:

QWidget *createEditor(QWidget *parent, const QStyleOptionViewItem &option,

const QModelIndex &index) const

{

SelectFileButton* btn = new SelectFileButton(index,QStringLiteral("查找文件路径"), parent); //这个是其他线程里的所以不能保存下来。每次的btn还不一样

return btn;

}

void setModelData(QWidget *editor, QAbstractItemModel *model,

const QModelIndex &index) const;

void setEditorData(QWidget *editor, const QModelIndex &index) const;

public:

SelectFileButtonDelegate(QObject *parent);

~SelectFileButtonDelegate();

private:

QPushButton* m_btn;

};

#endif // SELECTFILEBUTTONDELEGATE_H

通过painter画自定义控件

QStyleOption子类：

QStyleOptionButton, QStyleOptionComplex, QStyleOptionDockWidget, QStyleOptionFocusRect, QStyleOptionFrame, QStyleOptionGraphicsItem, QStyleOptionHeader, QStyleOptionMenuItem, QStyleOptionProgressBar, QStyleOptionRubberBand, QStyleOptionTab, QStyleOptionTabBarBase, QStyleOptionTabWidgetFrame, QStyleOptionToolBar, QStyleOptionToolBox, and QStyleOptionViewItem

一、painter 自定义进度条

//自定义进度条

BarDelegate::BarDelegate( QObject*parent ) : QAbstractItemDelegate( parent ) { }void BarDelegate::paint( QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index ) const{if( option.state &QStyle::State_Selected )

painter->fillRect( option.rect, option.palette.highlight() );//数据是存储在QStandardItemModel的QStandardItem，会自动根据当前行进行匹配(我认为)

int value = index.model()->data( index, Qt::DisplayRole ).toInt(); //这句，取得当前行的数据

qDebug() <

painter->save(); //保存旧画板(我认为)//进度条背景色

if( factor > 0.8)

{

painter->setBrush( Qt::red ); //超过0.8画纯红色

factor = 1;

}elsepainter->setBrush( QColor( 0, int(factor*255), 255-int(factor*255) ) ); //否则颜色依次变淡

int n = factor*100;

QString str1= QString("%1\%").arg(n);

painter->setPen( Qt::red ); //画笔颜色(这里没用到，我认为)//前面都是准备工作，这里才是真正画进度条

painter->drawRect( option.rect.x()+2, option.rect.y()+2, int(factor*(option.rect.width()-5)), option.rect.height()-5);

painter->drawText(option.rect.x()+int(factor*(option.rect.width()))+2, option.rect.y()+option.rect.height()/2, str1);

painter->restore(); //恢复新画板(我认为)

}

QSize BarDelegate::sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index ) const{return QSize( 45, 15 ); //随便改，不影响(我认为)

}

class BarDelegate : publicQAbstractItemDelegate

{public:

BarDelegate( QObject*parent = 0);//覆盖两个函数就可以显示进度条

void paint( QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index ) const;

QSize sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index ) const;

};

1 painter进度条 QStyleOptionProgressBar

void ProgressBarDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const{if(index.column() == 0) {int value = index.model()->data(index).toInt();

QStyleOptionProgressBarV2 progressBarOption;

progressBarOption.rect= option.rect.adjusted(4, 4, -4, -4);

progressBarOption.minimum= 0;

progressBarOption.maximum= 100;

progressBarOption.textAlignment=Qt::AlignRight;

progressBarOption.textVisible= true;

progressBarOption.progress=value;

progressBarOption.text= tr("%1%").arg(progressBarOption.progress);

painter->save();if (option.state &QStyle::State_Selected) {

painter->fillRect(option.rect, option.palette.highlight());

painter->setBrush(option.palette.highlightedText());

}

QApplication::style()->drawControl(QStyle::CE_ProgressBar, &progressBarOption, painter);

painter->restore();

}else{returnQItemDelegate::paint (painter, option, index);

}

二、painter自定义按钮 QStyTableViewDelegate::TableViewDelegate(int z_Column, int z_NumberButtons,QWidget *parent)

: QStyledItemDelegate(parent),

m_pOpenButton(newQPushButton()),

m_pDeleteButton(newQPushButton()),

m_nSpacing(5),

m_nWidth(25),

m_nHeight(20),

m_Column(z_Column),

m_NumberButtons(z_NumberButtons)

{if (2 ==m_NumberButtons)

{

m_list<< QStringLiteral("编辑按钮") << QStringLiteral("删除按钮");

}//设置按钮正常、划过、按下样式

QString z_Path =QCoreApplication::applicationDirPath();

m_pOpenButton->setStyleSheet("QPushButton {border: none; background-color: transparent; image:url("+z_Path+"/res/system.png);} \

QPushButton:hover {image:url("+z_Path+"/res/system.png);} \

QPushButton:pressed {image:url("+z_Path+"/res/system.png);}");

m_pDeleteButton->setStyleSheet("QPushButton {border: none; background-color: transparent; image:url("+z_Path+"/res/delete.png);} \

QPushButton:hover {image:url("+z_Path+"/res/delete.png);} \

QPushButton:pressed {image:url("+z_Path+"/res/delete.png);}");

}

TableViewDelegate::~TableViewDelegate()

{

}//绘制按钮

void TableViewDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const{

QStyleOptionViewItem viewOption(option);

initStyleOption(&viewOption, index);if(option.state.testFlag(QStyle::State_HasFocus))

viewOption.state= viewOption.state ^QStyle::State_HasFocus;

QStyledItemDelegate::paint(painter, viewOption, index);if (index.column() ==m_Column)

{//计算按钮显示区域

int nCount =m_list.count();int nHalf = (option.rect.width() - m_nWidth * nCount - m_nSpacing * (nCount - 1)) / 2;int nTop = (option.rect.height() - m_nHeight) / 2;for (int i = 0; i < nCount; ++i)

{//绘制按钮

QStyleOptionButton button;

button.rect= QRect(option.rect.left() + nHalf + m_nWidth * i + m_nSpacing *i,

option.rect.top()+nTop, m_nWidth, m_nHeight);

button.state|=QStyle::State_Enabled;

button.iconSize= QSize(20, 20);if(button.rect.contains(m_mousePoint))

{if (m_nType == 0)

{

button.state|=QStyle::State_MouseOver;//button.icon = QIcon(QString(":/Images/%1Hover").arg(m_list.at(i)));

}else if (m_nType == 1)

{

button.state|=QStyle::State_Sunken;//button.icon = QIcon(QString(":/Images/%1Pressed").arg(m_list.at(i)));

}

}//QWidget *pWidget = m_pOpenButton.data();

QWidget *pWidget = (i == 0) ?m_pOpenButton.data() : m_pDeleteButton.data();

pWidget->style()->drawControl(QStyle::CE_PushButton, &button, painter, pWidget);

}

}//响应按钮事件 - 划过、按下

bool TableViewDelegate::editorEvent(QEvent* event, QAbstractItemModel* model, const QStyleOptionViewItem& option, const QModelIndex&index)

{if (index.column() !=m_Column)return false;

m_nType= -1;bool bRepaint = false;

QMouseEvent*pEvent = static_cast (event);

m_mousePoint= pEvent->pos();int nCount =m_list.count();int nHalf = (option.rect.width() - m_nWidth * nCount - m_nSpacing * (nCount - 1)) / 2;int nTop = (option.rect.height() - m_nHeight) / 2;//还原鼠标样式

QApplication::restoreOverrideCursor();for (int i = 0; i < nCount; ++i)

{

QStyleOptionButton button;

button.rect= QRect(option.rect.left() + nHalf + m_nWidth * i + m_nSpacing *i,

option.rect.top()+nTop, m_nWidth, m_nHeight);//鼠标位于按钮之上

if (!button.rect.contains(m_mousePoint))continue;

bRepaint= true;switch (event->type())

{//鼠标滑过

caseQEvent::MouseMove:

{//设置鼠标样式为手型//QApplication::setOverrideCursor(Qt::PointingHandCursor);

m_nType= 0;

QToolTip::showText(pEvent->globalPos(), m_list.at(i));break;

}//鼠标按下

caseQEvent::MouseButtonPress:

{

m_nType= 1;break;

}//鼠标释放

caseQEvent::MouseButtonRelease:

{if (i == 0)

{

emit EditData(index);

}else{

emit deleteData(index);

}break;

}default:break;

}

}returnbRepaint;

}

三 painter 设置图片

void ItemdelegateTest::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const{

QStyleOptionViewItem viewOption(option);if (viewOption.state &QStyle::State_HasFocus)

{

viewOption.state= viewOption.state ^QStyle::State_HasFocus;

}

QStyledItemDelegate::paint(painter, viewOption, index);int height = (viewOption.rect.height()) / 2;

QPixmap pixmap= QPixmap(":/check.png");//QPixmap pixmap = QPixmap("E:/qt/QtDelegateTestT/zhj.png");

QRect DrawRect = QRect(viewOption.rect.left() + viewOption.rect.width() - 30, viewOption.rect.top() + height, 9, 9);

painter->drawPixmap(DrawRect, pixmap);

}bool ItemdelegateTest::editorEvent(QEvent *event, QAbstractItemModel *model, const QStyleOptionViewItem &option, const QModelIndex &index)

{int height = (option.rect.height()) / 2;

QRect DrawRect= QRect(option.rect.left() + option.rect.width() - 30, option.rect.top() + height, 9, 9);//QMouseEvent *mouseEvent = static_cast(event);

QMouseEvent *mouseEvent = static_cast(event);if (event->type() == QEvent::MouseButtonPress && DrawRect.contains(mouseEvent->pos()))

{

emit deleteItem(index);

}if (event->type() == QEvent::MouseMove && DrawRect.contains(mouseEvent->pos()))

{

QCursor cursor(Qt::PointingHandCursor);

QApplication::setOverrideCursor(cursor);

QToolTip::showText(mouseEvent->globalPos(), "删除");

}else{

QCursor cursor(Qt::ArrowCursor);

QApplication::setOverrideCursor(cursor);

}return QStyledItemDelegate::editorEvent(event, model, option, index);

}

panier绘制checkbox

CheckBoxDelegate::CheckBoxDelegate(QObject *parent)

: QStyledItemDelegate(parent)

{

}

CheckBoxDelegate::~CheckBoxDelegate()

{

}//绘制复选框

void CheckBoxDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const{

QStyleOptionViewItem viewOption(option);

initStyleOption(&viewOption, index);if(option.state.testFlag(QStyle::State_HasFocus))

viewOption.state= viewOption.state ^QStyle::State_HasFocus;

QStyledItemDelegate::paint(painter, viewOption, index);if (index.column() ==CHECK_BOX_COLUMN)

{bool data = index.model()->data(index, Qt::UserRole).toBool();

QStyleOptionButton checkBoxStyle;

checkBoxStyle.state= data ?QStyle::State_On : QStyle::State_Off;

checkBoxStyle.state|=QStyle::State_Enabled;

checkBoxStyle.iconSize= QSize(20, 20);

checkBoxStyle.rect=option.rect;

QCheckBox checkBox;

QApplication::style()->drawPrimitive(QStyle::PE_IndicatorCheckBox, &checkBoxStyle, painter, &checkBox);

}

}//响应鼠标事件，更新数据

bool CheckBoxDelegate::editorEvent(QEvent *event, QAbstractItemModel *model, const QStyleOptionViewItem &option, const QModelIndex &index)

{

QRect decorationRect=option.rect;

QMouseEvent*mouseEvent = static_cast(event);if (event->type() == QEvent::MouseButtonPress && decorationRect.contains(mouseEvent->pos()))

{if (index.column() ==CHECK_BOX_COLUMN)

{bool data = model->data(index, Qt::UserRole).toBool();

model->setData(index, !data, Qt::UserRole);

}

}return QStyledItemDelegate::editorEvent(event, model, option, index);

}---------------------作者：一去丶二三里

来源：CSDN

原文：https://blog.csdn.net/liang19890820/article/details/50721200

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