C++ QStyledItemDelegate:单击时将QComboBox值提交给模型
我正在为特定字段在模型上设置C++ QStyledItemDelegate:单击时将QComboBox值提交给模型,c++,qt,qt5,qcombobox,qitemdelegate,C++,Qt,Qt5,Qcombobox,Qitemdelegate,我正在为特定字段在模型上设置QStyledItemDelegate,并从QStyledItemDelegate::createEditor QComboBox* createEditor(QWidget* parent) { QComboBox* cb = new QComboBox(parent); cb->addItem("UNDEFINED"); cb->addItem("TEST"); cb->addItem("OSE"); c
QStyledItemDelegate
,并从QStyledItemDelegate::createEditor
QComboBox* createEditor(QWidget* parent)
{
QComboBox* cb = new QComboBox(parent);
cb->addItem("UNDEFINED");
cb->addItem("TEST");
cb->addItem("OSE");
cb->addItem("TSE");
return cb;
}
void setEditorData(QWidget* editor, const QModelIndex& index)
{
QComboBox* cb = qobject_cast<QComboBox*>(editor);
if (!cb)
throw std::logic_error("editor is not a combo box");
QString value = index.data(Qt::EditRole).toString();
int idx = cb->findText(value);
if (idx >= 0)
cb->setCurrentIndex(idx);
cb->showPopup();
}
问题:
当用户在列表中选择一项且组合框列表关闭时,如何将我的
QComboBox
配置为自动提交数据,如以下示例所示,当选择某个项目时,您需要发出信号commitData
和closeEditor
,而不需要再按一下Enter
?
#include <QApplication>
#include <QStandardItemModel>
#include <QListView>
#include <QStyledItemDelegate>
#include <QComboBox>
class ComboBoxDelegate: public QStyledItemDelegate{
public:
using QStyledItemDelegate::QStyledItemDelegate;
QWidget *createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const{
Q_UNUSED(option)
Q_UNUSED(index)
QComboBox* editor = new QComboBox(parent);
connect(editor, QOverload<int>::of(&QComboBox::activated),
this, &ComboBoxDelegate::commitAndCloseEditor);
editor->addItems({"UNDEFINED", "TEST", "OSE", "TSE"});
return editor;
}
void setEditorData(QWidget *editor, const QModelIndex &index) const{
QComboBox* cb = qobject_cast<QComboBox*>(editor);
if (!cb)
throw std::logic_error("editor is not a combo box");
QString value = index.data(Qt::EditRole).toString();
int idx = cb->findText(value);
if (idx >= 0)
cb->setCurrentIndex(idx);
cb->showPopup();
}
private:
void commitAndCloseEditor(){
QComboBox *editor = qobject_cast<QComboBox *>(sender());
emit commitData(editor);
emit closeEditor(editor);
}
};
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
QListView view;
QStandardItemModel model;
for(int i=0; i<10; i++){
model.appendRow(new QStandardItem("UNDEFINED"));
}
view.setItemDelegate(new ComboBoxDelegate(&view));
view.setModel(&model);
view.show();
return a.exec();
}
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类ComboBoxDelegate:公共QStyledItemDelegate{
公众:
使用QStyledItemDelegate::QStyledItemDelegate;
QWidget*createEditor(QWidget*父项、常量QStyleOptionViewItem和option、常量QModelIndex和索引)常量{
Q_未使用(可选)
Q_未使用(索引)
QCOMBOX*编辑器=新的QCOMBOX(父级);
连接(编辑器,QOverload::of(&QComboBox::已激活),
这是(&ComboBoxDelegate::commitAndCloseEditor);
编辑器->附加项({“未定义”、“测试”、“OSE”、“TSE”});
返回编辑器;
}
void setEditorData(QWidget*编辑器,常量QModelIndex和index)常量{
QComboBox*cb=qobject\u cast(编辑器);
如果(!cb)
抛出std::logic_错误(“编辑器不是组合框”);
QString值=index.data(Qt::EditRole).toString();
int idx=cb->findText(值);
如果(idx>=0)
cb->setCurrentIndex(idx);
cb->showPopup();
}
私人:
void committencloseeditor(){
QComboBox*编辑器=qobject_cast(sender());
发出提交数据(编辑器);
发出关闭编辑器(编辑器);
}
};
int main(int argc,char*argv[])
{
质量保证申请a(argc、argv);
QListView视图;
QS标准模型;
对于(int i=0;i
#include <QApplication>
#include <QStandardItemModel>
#include <QListView>
#include <QStyledItemDelegate>
#include <QComboBox>
class ComboBoxDelegate: public QStyledItemDelegate{
public:
using QStyledItemDelegate::QStyledItemDelegate;
QWidget *createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const{
Q_UNUSED(option)
Q_UNUSED(index)
QComboBox* editor = new QComboBox(parent);
connect(editor, QOverload<int>::of(&QComboBox::activated),
this, &ComboBoxDelegate::commitAndCloseEditor);
editor->addItems({"UNDEFINED", "TEST", "OSE", "TSE"});
return editor;
}
void setEditorData(QWidget *editor, const QModelIndex &index) const{
QComboBox* cb = qobject_cast<QComboBox*>(editor);
if (!cb)
throw std::logic_error("editor is not a combo box");
QString value = index.data(Qt::EditRole).toString();
int idx = cb->findText(value);
if (idx >= 0)
cb->setCurrentIndex(idx);
cb->showPopup();
}
private:
void commitAndCloseEditor(){
QComboBox *editor = qobject_cast<QComboBox *>(sender());
emit commitData(editor);
emit closeEditor(editor);
}
};
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
QListView view;
QStandardItemModel model;
for(int i=0; i<10; i++){
model.appendRow(new QStandardItem("UNDEFINED"));
}
view.setItemDelegate(new ComboBoxDelegate(&view));
view.setModel(&model);
view.show();
return a.exec();
}