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Problem beim Abrufen von Delegaten in QTableWidget, ich versuche, zwei Delegaten (comboboxdelegate, spinbox Delegate) zu verwenden, um Benutzereingaben in einem QTableWidget mit 2 Spalten und einer Zeile zu steuern, aber nach dem Lesen der Delegierten Klassen Seite und Blick durch die SpinBox & comboox Delegiertenbeispiel, ich dachte, ich hätte herausgefunden, wie die Dinge funktionieren, aber eindeutig nicht.Wie kann ich Delegate für QTableWidget bekommen?
(Entschuldigung für mein Englisch), wird jede Hilfe geschätzt.
Der Code ist wie folgt.
notepad.h Datei
#ifndef NOTEPAD_H
#define NOTEPAD_H
#include <QtGui>
class Notepad : public QMainWindow
{
Q_OBJECT
public:
//Notepad(QWidget *parent = 0, Qt::WFlags flags = 0);
Notepad();
void test();
QTableWidget* table ;
public slots:
void add();
void Delete();
void mouseReleaseEvent (QMouseEvent * event);
private:
QAction *add_action;
QAction *Delete_action;
};
class SpinBoxDelegate : public QStyledItemDelegate,public Notepad
{
Q_OBJECT
public:
SpinBoxDelegate(QObject *parent = 0);
QWidget *createEditor(QWidget *parent, const QStyleOptionViewItem &option,
const QModelIndex &index) /*const Q_DECL_OVERRIDE*/;
void setEditorData(QWidget *editor, const QModelIndex &index) /*const Q_DECL_OVERRIDE*/;
void setModelData(QWidget *editor, QAbstractItemModel *model,
const QModelIndex &index) /*const Q_DECL_OVERRIDE*/;
void updateEditorGeometry(QWidget *editor,
const QStyleOptionViewItem &option, const QModelIndex &index) /*const Q_DECL_OVERRIDE*/;
};
class ComboBoxDelegate : public QStyledItemDelegate,public Notepad
{
Q_OBJECT
public:
ComboBoxDelegate(QObject *parent = 0);
QWidget *createEditor(QWidget *parent, const QStyleOptionViewItem &option,
const QModelIndex &index) const;
void setEditorData(QWidget *editor, const QModelIndex &index) const;
void setModelData(QWidget *editor, QAbstractItemModel *model,
const QModelIndex &index) const;
void updateEditorGeometry(QWidget *editor,
const QStyleOptionViewItem &option, const QModelIndex &index) const;
};
#endif // NOTEPAD_H
notepad.cpp Datei
#include "notepad.h"
#include <QMessageBox>
#include <QTableView>
#include <QMouseEvent>
#include <QSpinBox>
#include <QComboBox>
#include <QStandardItemModel>
Notepad::Notepad()
{
table = new QTableWidget();
test() ;
SpinBoxDelegate();
ComboBoxDelegate();
add_action = new QAction(tr("Add cell"), this);
add_action->setIcon(QIcon("add.jpg"));
Delete_action = new QAction(tr("Delete cell"), this);
Delete_action->setIcon(QIcon("delete.jpg"));
connect(Delete_action, SIGNAL(triggered()), this, SLOT(Delete()));
connect(add_action, SIGNAL(triggered()), this, SLOT(add()));
//tableItem->setFlags(tableItem->flags()^Qt::ItemIsEditable);
centralWidget()->setAttribute(Qt::WA_TransparentForMouseEvents);
centralWidget()->setAttribute(Qt::WA_MouseTracking,true);
setMouseTracking(true);
}
void Notepad::test()
{
QTableWidgetItem* tableItem = new QTableWidgetItem();
table->setRowCount(1);
table->setColumnCount(3);
table->setItem(0,0,new QTableWidgetItem());
table->setItem(0,1,new QTableWidgetItem());
table->setItem(0,2,new QTableWidgetItem());
table->setMouseTracking(true);
table->viewport()->setMouseTracking(true);
table->installEventFilter(this);
table->viewport()->installEventFilter(this);
table->setSelectionBehavior(QAbstractItemView::SelectRows);
table->setSelectionMode(QAbstractItemView::SingleSelection);
QStandardItemModel model((table->rowCount()),(table->columnCount()));
SpinBoxDelegate sdelegate;
ComboBoxDelegate comDel;
for (int row = 0; row < 4; ++row)
{
QWidget *parent;
QStyleOptionViewItem option;
for (int column = 0; column < 1; ++column)
{
table->setItemDelegateForColumn(column, &comDel);
QModelIndex index = model.index(row, column, QModelIndex());
model.setData(index, QVariant((row + 1) * (column + 1)));
}
for (int column = 1; column < 2; ++column)
{
table->setItemDelegateForColumn(column, &sdelegate );
QModelIndex index = model.index(row, column, QModelIndex());
model.setData(index, QVariant((row + 1) * (column + 1)));
}
}
table->setHorizontalHeaderItem(0, new QTableWidgetItem("combobox"));
table->setHorizontalHeaderItem(1, new QTableWidgetItem("spinbox"));
table->setHorizontalHeaderItem(2, new QTableWidgetItem("lineEdit"));
tableItem->setFlags(tableItem->flags()^Qt::ItemIsEditable);
table->setSizePolicy(QSizePolicy::Expanding,QSizePolicy::Expanding);
setCentralWidget(table);
}
void Notepad::mouseReleaseEvent (QMouseEvent * event)
{
QMessageBox* msgBox;
if(event->button() == Qt::RightButton)
{
QMouseEvent *mouseEvent = static_cast<QMouseEvent*> (event);
QMenu *menu = new QMenu(this);
menu->addAction(add_action);
menu->addAction(Delete_action);
menu->exec(mouseEvent->globalPos());
//msgBox->setInformativeText("u pressed right button");
}
}
void Notepad::add()
{
table->insertRow(1);
setCentralWidget(table);
centralWidget()->setAttribute(Qt::WA_TransparentForMouseEvents);
setMouseTracking(true);
}
void Notepad::Delete()
{
table->removeRow(1);
setCentralWidget(table);
centralWidget()->setAttribute(Qt::WA_TransparentForMouseEvents);
setMouseTracking(true);
}
SpinBoxDelegate::SpinBoxDelegate(QObject *parent)
: QStyledItemDelegate(parent)
{
}
QWidget *SpinBoxDelegate::createEditor(QWidget *parent,
const QStyleOptionViewItem &/* option */,
const QModelIndex &/* index */)/* const*/
{
QSpinBox *editor = new QSpinBox(parent);
editor->setFrame(false);
editor->setMinimum(0);
editor->setMaximum(100);
return editor;
}
void SpinBoxDelegate::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 SpinBoxDelegate::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 SpinBoxDelegate::updateEditorGeometry(QWidget *editor,
const QStyleOptionViewItem &option, const QModelIndex &/* index */) /*const*/
{
editor->setGeometry(option.rect);
}
ComboBoxDelegate::ComboBoxDelegate(QObject *parent)
: QStyledItemDelegate(parent)
{
}
QWidget *ComboBoxDelegate::createEditor(QWidget *parent,
const QStyleOptionViewItem &/* option */,
const QModelIndex &/* index */) const
{
QComboBox *editor = new QComboBox(parent);
QStringList list ;
list << "srikanth" << "dilip";
editor->addItems(list);
//editor->installEventFilter(const_cast<ComboBoxDelegate*>(this));
return editor;
}
void ComboBoxDelegate::setEditorData(QWidget *editor,
const QModelIndex &index) const
{
QString value = index.model()->data(index, Qt::DisplayRole).toString();
QComboBox *comboBox = static_cast<QComboBox*>(editor);
comboBox->addItem(value);
}
void ComboBoxDelegate::setModelData(QWidget *editor, QAbstractItemModel *model,
const QModelIndex &index) const
{
QComboBox *comboBox = static_cast<QComboBox*>(editor);
QString value = comboBox->currentText();
model->setData(index, value);
}
void ComboBoxDelegate::updateEditorGeometry(QWidget *editor,
const QStyleOptionViewItem &option, const QModelIndex &/* index */) const
{
editor->setGeometry(option.rect);
}
main.cpp Datei
#include <QtGui>
#include <notepad.h>
int main(int argv, char **args) {
QApplication app(argv, args);
Notepad notepad;
notepad.show();
return app.exec();
}