QListWidget

1.失去焦点背景颜色，代码设置全选的时候，背景会是白色，需要设置失去焦点背景颜色。（设置焦点，会出现白转化成设置背景色，效果不好）

QPalette p;

    p.setColor(QPalette::Inactive,QPalette::Highlight,QColor(51,153,255));

    p.setColor(QPalette::Inactive,QPalette::HighlightedText,QColor(Qt::white));

    p.setColor(QPalette::Inactive,QPalette::Text,QColor(Qt::white));

    lwItems->setPalette(p);

去掉选择虚线框 MyListWidgetDelegate *listWidgetDelegate=new MyListWidgetDelegate(lwItems);

 lwItems->setItemDelegate(listWidgetDelegate);

void DataDlg::createMiddleListView()
{

    lwItems=new QListWidget();
    lwItems->setSelectionMode(QAbstractItemView::MultiSelection);
    lwItems->setEditTriggers(QAbstractItemView::SelectedClicked);
    QPalette p;
    p.setColor(QPalette::Inactive,QPalette::Highlight,QColor(51,153,255));
    p.setColor(QPalette::Inactive,QPalette::HighlightedText,QColor(Qt::white));
    p.setColor(QPalette::Inactive,QPalette::Text,QColor(Qt::white));
    lwItems->setPalette(p);
    lwItems->setIconSize(QSize(15,15));
    lwItems->setObjectName("lwItems");
    MyListWidgetDelegate *listWidgetDelegate=new MyListWidgetDelegate(lwItems);
    lwItems->setItemDelegate(listWidgetDelegate);
    addExportItems();
    contentLayout->addWidget(lwItems);

}

添加数据

void DataDlg::addExportItems()
{
    isExportData=true;
    lwItems->clear();
    btnImportExport->setText(exportText);
    for(int i=0;i<ExportFieldsCount;i++)
    {
       lwItems->addItem(ExportFields[i].fields);
       setListWidgetIcon(i,false);
    }

}

选择触发事件

void DataDlg::listWidgetEvent(QListWidgetItem *clickedItem)
{

    bool isSeleced=clickedItem->isSelected();

    if(isSeleced==true)
    {
        clickedItem->setIcon(QIcon(":/res/icons/images/checkbox_checked.png"));

    }
    else
    {
        clickedItem->setIcon(QIcon(":/res/icons/images/checkbox_unchecked.png"));

    }

}

设置全选或者取消全选

void DataDlg::onSelectAll()
{
    isSelectAll=!isSelectAll;

    int itemCount=lwItems->count();
    for(int i=0;i<itemCount;i++)
    {
      lwItems->item(i)->setSelected(isSelectAll);

      setListWidgetIcon(i,isSelectAll);
    }

}

添加图标

void DataDlg::setListWidgetIcon(int row,bool isChecked)
{
    if(isChecked)
    {
       lwItems->item(row)->setIcon(QIcon(":/res/icons/images/checkbox_checked.png"));
    }
    else
    {
        lwItems->item(row)->setIcon(QIcon(":/res/icons/images/checkbox_unchecked.png"));

    }

}

取出选中的值

int selectedCount=lwItems->selectedItems().count();
    if(selectedCount==0)
    {
        return;
    }

    QString selectedText="";
    for(int i=0;i<selectedCount;i++)
    {

        selectedText=lwItems->selectedItems().at(i)->text();
    }

2. 去掉选择虚线框

#ifndef MYLISTWIDGETDELEGATE_H
#define MYLISTWIDGETDELEGATE_H

#include <QObject>
#include<QItemDelegate>
#include<QPen>
#include<QPainter>
#include<QBrush>
#include<QStyledItemDelegate>

#include<QDebug>

class MyListWidgetDelegate : public QStyledItemDelegate
{
    Q_OBJECT
public:
    explicit MyListWidgetDelegate(QObject *parent = 0);

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

private:

signals:

public slots:
};

#endif // MYLISTWIDGETDELEGATE_H

#include "mylistwidgetdelegate.h"

MyListWidgetDelegate::MyListWidgetDelegate(QObject *parent) : QStyledItemDelegate(parent)
{

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

      QStyleOptionViewItem itemOption(option);
      if(itemOption.state & QStyle::State_HasFocus)
      {
          itemOption.state = itemOption.state ^ QStyle::State_HasFocus;
      }

     //调用默认委托
      QStyledItemDelegate::paint(painter,itemOption,index);

      QPen pen;
      pen.setColor(QColor(255,255,255));
      pen.setStyle(Qt::DotLine);
      painter->setPen(pen);
      painter->drawLine(itemOption.rect.bottomLeft(),itemOption.rect.bottomRight());

}

qss

QListWidget#lwItems{

    color:#FFFFFF;
    font:16pt "DejaVu Sans";
    background-color:#190101;
    margin:2px;
    padding-left:10px;
    padding-right:10px;
    border: 1px solid #32435E;

}

QListWidget#scaleItemsList,QListWidget#connectedIPList{

    color:#FFFFFF;
    font:16pt "DejaVu Sans";
    background-color:#190101;
    margin:20px;
    border: 1px solid #32435E;

}
QListWidget::item{

     border:solid #656565;
     border-width:0px 0px 1px 0px;
     padding:10px 0px 10px 15px;
     margin:0px 5px 0px 5px;

}

QListWidget::item:selected {

     background: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1,
                                 stop: 0 #6A848C,  stop: 1.0 #0F9EAF);

}

QListWidget::item:selected:!active {
     border-width: 0px ;

}
QListWidget::item:selected:active {
     border-width: 0px;

}