Daviddoria: Created page with '==main.cpp== #include #include "form.h" int main(int argc, char *argv[]) { QApplication app(argc, argv); Form form; form.show(); r…'

2011-12-21T02:21:10Z

Created page with '==main.cpp== <source lang="cpp"> #include <QApplication> #include "form.h" int main(int argc, char *argv[]) { QApplication app(argc, argv); Form form; form.show(); r…'

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==main.cpp==
<source lang="cpp">
#include <QApplication>

#include "form.h"

int main(int argc, char *argv[])
{
QApplication app(argc, argv);
Form form;

form.show();
return app.exec();
}
</source>

==ComboBoxDelegate.h==
<source lang="cpp">
#ifndef COMBOBOXDELEGATE_H
#define COMBOBOXDELEGATE_H

#include <string>
#include <vector>

#include <QItemDelegate>

class QModelIndex;
class QWidget;
class QVariant;

class ComboBoxDelegate : public QItemDelegate
{
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;
void paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const;

private:
std::vector<std::string> Items;

};
#endif

</source>

==ComboBoxDelegate.cpp==
<source lang="cpp">
#include "ComboBoxDelegate.h"

#include <QComboBox>
#include <QWidget>
#include <QModelIndex>
#include <QApplication>
#include <QString>

#include <iostream>

ComboBoxDelegate::ComboBoxDelegate(QObject *parent)
:QItemDelegate(parent)
{
Items.push_back("Test0");
Items.push_back("Test1");
Items.push_back("Test2");
}

QWidget *ComboBoxDelegate::createEditor(QWidget *parent, const QStyleOptionViewItem &/* option */, const QModelIndex &/* index */) const
{
QComboBox* editor = new QComboBox(parent);
for(unsigned int i = 0; i < Items.size(); ++i)
{
editor->addItem(Items[i].c_str());
}
return editor;
}

void ComboBoxDelegate::setEditorData(QWidget *editor, const QModelIndex &index) const
{
QComboBox *comboBox = static_cast<QComboBox*>(editor);
int value = index.model()->data(index, Qt::EditRole).toUInt();
comboBox->setCurrentIndex(value);
}

void ComboBoxDelegate::setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const
{
QComboBox *comboBox = static_cast<QComboBox*>(editor);
model->setData(index, comboBox->currentIndex(), Qt::EditRole);
}

void ComboBoxDelegate::updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem &option, const QModelIndex &/* index */) const
{
editor->setGeometry(option.rect);
}

void ComboBoxDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
{
QStyleOptionViewItemV4 myOption = option;
QString text = Items[index.row()].c_str();

myOption.text = text;

QApplication::style()->drawControl(QStyle::CE_ItemViewItem, &myOption, painter);
}

</source>

==form.h==
<source lang="cpp">
#ifndef FORM_H
#define FORM_H

#include "ui_form.h"

#include <QMainWindow>

#include "ComboBoxDelegate.h"

class QStringListModel;

class Form : public QMainWindow, private Ui::MainWindow
{
Q_OBJECT

public:
Form(QWidget *parent = 0);

public slots:
void on_btnAdd_clicked();
void slot_modelChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight);

protected:
QStringListModel* Model;
ComboBoxDelegate Delegate;
};

#endif

</source>

==form.cpp==
<source lang="cpp">
#include <QtGui>

#include <iostream>

#include "form.h"

Form::Form(QWidget *parent)
: QMainWindow(parent)
{
setupUi(this);

this->Model = new QStringListModel;
this->listView->setModel(this->Model);
connect(this->Model, SIGNAL(dataChanged(QModelIndex,QModelIndex)), this, SLOT(slot_modelChanged(QModelIndex,QModelIndex)));

this->listView->setItemDelegate(&this->Delegate);
}

void Form::on_btnAdd_clicked()
{
this->Model->insertRows(this->Model->rowCount(), 1);
this->Model->setData(this->Model->index(this->Model->rowCount()-1), "new line " + QString::number(this->Model->rowCount()));
}

void Form::slot_modelChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight)
{
std::cout << "Model changed." << std::endl;

// Make the combo boxes always displayed.
for ( int i = 0; i < this->Model->rowCount(); ++i )
{
this->listView->openPersistentEditor( this->Model->index(i) );
}
}

</source>

==form.ui==
<source lang="text">
<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
<class>MainWindow</class>
<widget class="QMainWindow" name="MainWindow">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>232</width>
<height>489</height>
</rect>
</property>
<property name="windowTitle">
<string>MainWindow</string>
</property>
<widget class="QWidget" name="centralwidget">
<layout class="QVBoxLayout" name="verticalLayout">
<item>
<widget class="QListView" name="listView"/>
</item>
<item>
<widget class="QPushButton" name="btnAdd">
<property name="text">
<string>Add</string>
</property>
</widget>
</item>
</layout>
</widget>
<widget class="QMenuBar" name="menubar">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>232</width>
<height>20</height>
</rect>
</property>
<widget class="QMenu" name="menuFile">
<property name="title">
<string>File</string>
</property>
<addaction name="actionSave"/>
</widget>
<addaction name="menuFile"/>
</widget>
<widget class="QStatusBar" name="statusBar"/>
<action name="actionSave">
<property name="text">
<string>Save</string>
</property>
</action>
</widget>
<resources/>
<connections/>
</ui>

</source>

==CMakeLists.txt==
<source lang="cmake">
cmake_minimum_required(VERSION 2.6)

PROJECT(ListViewSubclass)

FIND_PACKAGE(Qt4 REQUIRED)
INCLUDE(${QT_USE_FILE})

QT4_WRAP_UI(ListViewSubclass_UI form.ui)
QT4_WRAP_CPP(ListViewSubclass_MOC form.h ComboBoxDelegate.h)

include_directories(${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_BINARY_DIR})

ADD_EXECUTABLE(ListViewSubclass main.cpp form.h form.cpp ComboBoxDelegate.cpp ${ListViewSubclass_UI} ${ListViewSubclass_MOC})
TARGET_LINK_LIBRARIES(ListViewSubclass ${QT_LIBRARIES})

</source>

Qt/ModelView/ListViewComboBox - Revision history

Daviddoria: Created page with '==main.cpp== #include #include "form.h" int main(int argc, char *argv[]) { QApplication app(argc, argv); Form form; form.show(); r…'