C++ Qt-QSignalMapper调用的函数中的更新_C++_Qt_Pointers_Signals Slots_Qcombobox

C++ Qt-QSignalMapper调用的函数中的更新

c++ qt pointers

C++ Qt-QSignalMapper调用的函数中的更新,c++,qt,pointers,signals-slots,qcombobox,C++,Qt,Pointers,Signals Slots,Qcombobox,我有一个QTreeWidget，其中每个项目在一列中都有一个QComboBox。我已经用QSignalMapper将它连接到一个插槽，当它被触发时，我正在成功地检索组合框中的项和索引。我是这样做的： foreach(Workplace *wp, allWorkplaces){ QTreeWidgetItem *workplaceItem = new QTreeWidgetItem; workplaceItem->setText(0, wp->work

我有一个QTreeWidget，其中每个项目在一列中都有一个QComboBox。我已经用QSignalMapper将它连接到一个插槽，当它被触发时，我正在成功地检索组合框中的项和索引。我是这样做的：

foreach(Workplace *wp, allWorkplaces){
        QTreeWidgetItem *workplaceItem = new QTreeWidgetItem;

        workplaceItem->setText(0, wp->workplaceName());
        workplaceItem->setText(1, wp->workplaceDescription());

        myWorkplaceUi->treeWidget->addTopLevelItem(workplaceItem);

        QComboBox *combo = new QComboBox();

        combo->addItems(allShiftModels);

        combo->setAutoFillBackground(true);

        ShiftModel *shiftModel = qobject_cast<ShiftModel *>(wp->usedShiftModel);

        myWorkplaceUi->treeWidget->setItemWidget(workplaceItem,2, combo);

        if(shiftModel && !shiftModel->shiftModelName().isEmpty()){
            qDebug()<<"after the cast: "<< shiftModel->shiftModelName();
            combo->setCurrentIndex(combo->findText(shiftModel->shiftModelName(), Qt::MatchExactly));
        }else{
            combo->setCurrentIndex(combo->findText("None", Qt::MatchExactly));
        }

        connect(combo, SIGNAL(currentIndexChanged(int)), signalMapper, SLOT(map()));
        signalMapper->setMapping(combo, QString("%1").arg(wp->workplaceName()));
    }

    connect(signalMapper, SIGNAL(mapped(const QString &)),this, SLOT(changed(const QString &)));

和

更改的插槽：
void workplacesdialog::changed(QString position){

    QList<Workplace* > allWorkplaces = this->myProject->listMyWorkplaces();
    QList<ShiftModel*> allShiftModels = this->myProject->myFactory->listShiftModels();

    foreach(Workplace* workplace, allWorkplaces){
        foreach(ShiftModel *shiftmodel, allShiftModels){
            qDebug() <<"workplace:"<< workplace->workplaceName();
            qDebug() <<"shiftmodel:"<< shiftmodel->shiftModelName();

            QString wp = position;
            QTreeWidgetItem* item=(QTreeWidgetItem*)myWorkplaceUi->treeWidget->findItems(wp,Qt::MatchExactly,0).at(0);
            QComboBox *combo = (QComboBox*)myWorkplaceUi->treeWidget->itemWidget(item,2);
            if(combo && item){
                QString sm = combo->currentText();

                qDebug() << "selected shiftmodel "<< sm << " on workplace "<< wp;

                        if(workplace->workplaceName()==wp && shiftmodel->shiftModelName()==sm){
                            workplace->usedShiftModel = shiftmodel;
                            break;
                        }
                        else{
                            workplace->usedShiftModel = 0;
                            return;
                        }

            }else{
                qDebug() << "cast failed!";
                return;
            }
        }
    }
}

void workplacedialog:：已更改（QString位置）{
QList allWorkplaces=this->myProject->listMyWorkplaces（）；
QList allShiftModels=this->myProject->myFactory->listShiftModels（）；
foreach（工作场所*工作场所，所有工作场所）{
foreach（ShiftModel*ShiftModel，所有ShiftModel）{
qDebug（）项目小部件（项目2）；
如果（组合和项目）{
QString sm=combo->currentText（）；
qDebug（）usedShiftModel=0；
返回；
}
}否则{
qDebug（）问题在于：
if(workplace->workplaceName()==wp && shiftmodel->shiftModelName()==sm){
    workplace->usedShiftModel = shiftmodel;
    break;
}
else{
    workplace->usedShiftModel = 0;
    return;
}

如果工作场所名称不匹配，或者轮班模型名称不匹配，则将删除工作场所与其当前链接的轮班模型之间的关系，并返回函数
我可以为您重新构造两个for循环，但有一种更简单、更不容易出错的方法：
注意：我用“TODO”标记了一些代码路径，由于时间不够，我跳过了这些代码路径。不过，您应该能够自己找到它们
//为快速查找设置哈希
QHashworkplaceHash；
QList allWorkplaces=this->myProject->listMyWorkplaces（）；
foreach（工作场所*工作场所，所有工作场所）
{
insert（workplace，workplace->workplaceName（））；
}
//TODO:在这里对换档模式执行类似操作
//查找所选的工作场所
如果（！workplaceHash.contains（位置））
{
//TODO:错误处理（未知/未选择工作区）
返回；
}
//否则：已选择有效的工作区
Workplace*selectedWorkplace=workplaceHash.value（位置）；
//TODO:检索换档模型的名称（存储在变量sm中）
//查找所选的换档模式
如果（！shiftplaceHash.contains（sm））
{
//未选择任何换档模式
selectedWorkplace->usedShiftModel=0；
返回；
}
//其他：选择了工作地点和轮班模式
Shiftplace*selectedShiftModel=shiftplaceHash.value（sm）；
selectedWorkplace->usedShiftModel=selectedShiftModel；

重构的一些想法：

您可以在该方法之外创建哈希并将其存储在成员变量中。只要确保在添加或删除工作区时哈希始终更新即可
通过将部分代码提取到单独的方法中，例如QString getSelectedShiftModelName（）
等，可以更容易地发现错误
所以，最后我发现我的循环真的是一团糟了……现在可以工作了：
void workplacesdialog::changed(QString position){

    QList<Workplace* > allWorkplaces = this->myProject->listMyWorkplaces();
    QList<ShiftModel*> allShiftModels = this->myProject->myFactory->listShiftModels();

    qDebug() << allWorkplaces.size() << " workplaces";
    qDebug() << allShiftModels.size() << " ShiftModels";

    QString wp = position;
    QString sm;
    QTreeWidgetItem* item=(QTreeWidgetItem*)myWorkplaceUi->treeWidget->findItems(wp,Qt::MatchExactly,0).at(0);
    QComboBox *combo = (QComboBox*)myWorkplaceUi->treeWidget->itemWidget(item,2);
    if(combo && item){
        sm = combo->currentText();
        qDebug() << "selected shiftmodel "<< sm << " on workplace "<< wp;

    }else{
        qDebug() << "cast failed!";
        return;
    }

    foreach(Workplace* workplace, allWorkplaces){
        foreach(ShiftModel *shiftmodel, allShiftModels){
            qDebug() <<"workplace:"<< workplace->workplaceName();
            qDebug() <<"shiftmodel:"<< shiftmodel->shiftModelName();
            if(workplace->workplaceName()==wp && shiftmodel->shiftModelName()==sm){
                qDebug() << "found match!: "<< wp << " >>>>> " << sm;
                workplace->usedShiftModel = shiftmodel;
                return;
            }else if(workplace->workplaceName()==wp && sm=="None"){
                qDebug() << "clear match: "<< wp << " >>>>> " << sm;
                workplace->usedShiftModel = 0;
                return;
            }
        }
    }
}

void workplacedialog:：已更改（QString位置）{
QList allWorkplaces=this->myProject->listMyWorkplaces（）；
QList allShiftModels=this->myProject->myFactory->listShiftModels（）；
qDebug（）项目小部件（项目2）；
如果（组合和项目）{
sm=组合->当前文本（）；
qDebug（）这听起来真的很聪明，也许在未来的某个时候我会回到它，但现在对于快速原型设计，我有了另一个解决方案…好的提示，不过！+1'd！
// Set up hashes for quick lookup
QHash< QString, Workplace* > workplaceHash;

QList<Workplace* > allWorkplaces = this->myProject->listMyWorkplaces();
foreach( Workplace* workplace, allWorkplaces )
{
    workplaceHash.insert( workplace, workplace->workplaceName() );
}

// TODO: Do a similar thing for the shift models here

// Find the selected workplace
if( !workplaceHash.contains( position ) )
{
    // TODO: Error handling (An unknown/No workplace was selected)
    return;
}
// else: A valid workplace was selected

Workplace* selectedWorkplace = workplaceHash.value( position );

// TODO: Retrieve the name of the shift model (stored in variable sm)

// Find the selected shiftmodel
if( !shiftplaceHash.contains( sm ) )
{
    // No shift model was selected
    selectedWorkplace->usedShiftModel= 0;
    return;
}
// Else: Both work place and shift model were selected

Shiftplace* selectedShiftModel = shiftplaceHash.value( sm );

selectedWorkplace->usedShiftModel = selectedShiftModel;

void workplacesdialog::changed(QString position){

    QList<Workplace* > allWorkplaces = this->myProject->listMyWorkplaces();
    QList<ShiftModel*> allShiftModels = this->myProject->myFactory->listShiftModels();

    qDebug() << allWorkplaces.size() << " workplaces";
    qDebug() << allShiftModels.size() << " ShiftModels";

    QString wp = position;
    QString sm;
    QTreeWidgetItem* item=(QTreeWidgetItem*)myWorkplaceUi->treeWidget->findItems(wp,Qt::MatchExactly,0).at(0);
    QComboBox *combo = (QComboBox*)myWorkplaceUi->treeWidget->itemWidget(item,2);
    if(combo && item){
        sm = combo->currentText();
        qDebug() << "selected shiftmodel "<< sm << " on workplace "<< wp;

    }else{
        qDebug() << "cast failed!";
        return;
    }

    foreach(Workplace* workplace, allWorkplaces){
        foreach(ShiftModel *shiftmodel, allShiftModels){
            qDebug() <<"workplace:"<< workplace->workplaceName();
            qDebug() <<"shiftmodel:"<< shiftmodel->shiftModelName();
            if(workplace->workplaceName()==wp && shiftmodel->shiftModelName()==sm){
                qDebug() << "found match!: "<< wp << " >>>>> " << sm;
                workplace->usedShiftModel = shiftmodel;
                return;
            }else if(workplace->workplaceName()==wp && sm=="None"){
                qDebug() << "clear match: "<< wp << " >>>>> " << sm;
                workplace->usedShiftModel = 0;
                return;
            }
        }
    }
}