#include <QListWidget>
#include <QCheckBox>
#include <QList>
#include <QLineEdit>
#include <QDebug>
#include "llcombobox.h"
class LLComboBoxPrivate
{
public:
QStringList selectedDataList;
QListWidget *pListWidget;
};
LLComboBox::LLComboBox(QWidget *parent)
: QComboBox(parent)
, m_pd(new LLComboBoxPrivate)
{
m_pd->pListWidget = new QListWidget;
m_pd->pListWidget->setFixedHeight(100);
connect(m_pd->pListWidget, SIGNAL(itemChanged(QListWidgetItem *)), this, SLOT(slot_itemChanged(QListWidgetItem *)));
setView(m_pd->pListWidget);
//设置Editable为true，lineEdit() 函数才不返回空
setEditable(true);
}
void LLComboBox::addDataItem(const QString &text, const QVariant &userData)
{
m_pd->pListWidget->blockSignals(true);
QListWidgetItem *pItem = new QListWidgetItem(text, m_pd->pListWidget);
pItem->setData(Qt::UserRole, userData);
pItem->setCheckState(Qt::Unchecked);
//设置QListWidgetItem 可交互且可以选中和取消选中
pItem->setFlags(Qt::ItemIsUserCheckable | Qt::ItemIsEnabled);
m_pd->pListWidget->addItem(pItem);
QComboBox::addItem(text);
QComboBox::setCurrentText("");
m_pd->pListWidget->blockSignals(false);
}
void LLComboBox::setSelectedData(const QStringList &selectedData)
{
m_pd->selectedDataList.clear();
m_pd->selectedDataList += selectedData;
QString text = "";
for (int var = 0; var < m_pd->selectedDataList.size(); ++var)
{
m_pd->pListWidget->blockSignals(true);
QListWidgetItem *pItem = m_pd->pListWidget->item(var);
pItem->setCheckState(Qt::Checked);
m_pd->pListWidget->blockSignals(false);
text.append(m_pd->selectedDataList[var]);
if(var < m_pd->selectedDataList.size() - 1)
{
text.append(",");
}
}
lineEdit()->setText(text);
}
QStringList LLComboBox::selectedDataText()
{
return m_pd->selectedDataList;
}
QList<QVariant> LLComboBox::selectedUserData()
{
QList<QVariant> dataList;
for (int var = 0; var < m_pd->selectedDataList.size(); ++var)
{
QListWidgetItem *pItem = m_pd->pListWidget->item(var);
if(pItem->checkState() == Qt::Checked)
{
dataList.append(pItem->data(Qt::UserRole));
}
}
return dataList;
}
void LLComboBox::slot_itemChanged(QListWidgetItem *item)
{
qDebug() << QString("text=") << item->text();
if(m_pd->selectedDataList.contains(item->text()))
{
m_pd->selectedDataList.removeOne(item->text());
}
else
{
m_pd->selectedDataList.append(item->text());
}
QString text = "";
for (int var = 0; var < m_pd->selectedDataList.size(); ++var)
{
text.append(m_pd->selectedDataList[var]);
if(var < m_pd->selectedDataList.size() - 1)
{
text.append(",");
}
}
lineEdit()->setText(text);
}
