checkComboBox , how to do?

[colin207]

Hi

Tried this looks great BUT I find it sizes the combo incorrectly.

e.g this code which sticks a CheckComboBox in a toolbar:
CheckComboBox * px = new CheckComboBox;
px->addItem("eggs", false);
px->addItem("bananas", true);
px->addItem("a somewhat longer option", false);
pToolBar->addWidget(px);
... then when popped up the last, longest item has its text displayed as "a somewhat longer o..." even though the combo box has obviously tried to size itself to the correct width to show all the items (I know that for certain; if I stick in a much longer text item it tries to size itself to that, but is still slightly too short). My guess is that whereever the code is that sizes the conbo, it isnt taking into account the extra width needed for the checkbox.

Any ideas/solutions anyone?

Thx

[pinkiP]

Hi,

I like to edit the lineedit of the checkcombobox while my program is running. So I set setEditable(true). Now, the problem is that the lineedit ignores the keyEvent. I tried to define a keyEvent, but it doesn't work. Has anyone an idea?

[pinkiP]

I got it. So here is my code. You have to promote this to a QComboBox.

/*  mycombobox.h  */
#ifndef MYCOMBOBOX_H
#define MYCOMBOBOX_H
 
#include <QtGui>
 
class MyComboBox : public QComboBox
{
    Q_OBJECT
public:
    MyComboBox(QWidget *parent = 0) : QComboBox(parent)
    {
        setEditable(true);
        model = new QStandardItemModel;
        displayedit = "";
        itemcount = model->rowCount();
        updateText();
    }
 
    void showPopup()
    {
         temp = new QStandardItemModel;
    temp = model;
 
    /*
        if the user write somthing into the edit line, the new number of rows will be greater than the old number of rows:
            the new items has to be set as checkable items and every item should be only one time in the list
    */
    if(itemcount <temp->rowCount())
    {
        for (int row = 0; row<model->rowCount(); row++)         //for every item in the model set the new model
        {
            if(row == itemcount)
            {
                /*
                  Tests if more than one new item are added at the same time
                  */
                QString string = this->itemText(row);
                QString pattern("; ");
                QStringList datalist = string.split(pattern);
 
                /*
                    if only one item was add:
                        set the item checked and add it to the model
                */
                if (datalist.count() == 1)
                {
                    QStandardItem *newItem = new QStandardItem;
                    newItem->setText(datalist.at(0));
                    newItem->setFlags(Qt::ItemIsUserCheckable| Qt::ItemIsEnabled);
                    newItem->setData(Qt::Checked,Qt::CheckStateRole);
                    model->setItem(row,0,newItem);
                    row++;
                }
 
                /*
                    if more than one item was written in the edit line:
                        test for similarity with the items in the current list
                        and add every new item as new single item to the model and will be checked
                */
                else{
                    for (int size = 0; size<datalist.count(); size++ )
                    {
                        QList<QStandardItem*> list = temp->findItems(datalist.at(size));        //check for similarity
                        if(list.empty() == true)
                        {
 
                            QStandardItem *newItem = new QStandardItem;
                            newItem->setText(datalist.at(size));
                            newItem->setFlags(Qt::ItemIsUserCheckable| Qt::ItemIsEnabled);
                            newItem->setData(Qt::Checked,Qt::CheckStateRole);
                            model->setItem(row,0,newItem);
                            row++;
                        }
 
                    }
                }
            }
 
            /*
              in case, that only the current available items were checked
            */
            else {
                QStandardItem *newItem = new QStandardItem;
                newItem->setText(this->itemText(row));
                newItem->setFlags(Qt::ItemIsUserCheckable| Qt::ItemIsEnabled);
                if(temp->item(row,0)->checkState()  == Qt::Checked)
                {
                    newItem->setData(Qt::Checked,Qt::CheckStateRole);
                    qDebug()<<"blubb";
                }
                else newItem->setData(Qt::Unchecked,Qt::CheckStateRole);
                model->setItem(row,0,newItem);
            }
        }
    }
 
    // set the model of the combobox
    this->setModel(model);
 
    QComboBox::showPopup();
 
    // set the current number of items
    itemcount = model->rowCount();
 
    }
    void hidePopup()
    {
        displayedit = "";
        for(int i = 0; i<model->rowCount(); i++)
        {
            if(model->item(i,0)->checkState() == Qt::Checked)
            {
                displayedit = displayedit + model->item(i,0)->text() +"; ";
            }
 
        }
        QComboBox::hidePopup();
        QTimer::singleShot(0, this, SLOT(updateText()));
        this->setToolTip(displayedit);
    }
 
    void addItem(const QString &text/*, const QVariant &userData*/)
    {
        int row = model->rowCount();
        item = new QStandardItem;
        item->setText(text);
        item->setFlags(Qt::ItemIsUserCheckable| Qt::ItemIsEnabled);
        item->setData(Qt::Unchecked,Qt::CheckStateRole);
        model->setItem(row,0,item);
        this->setModel(model);
        itemcount = model->rowCount();
    }
 
    void addItems(const QStringList &texts){
 
        for (int i = 0; i <texts.count();i++)
        {
            int row = model->rowCount();
            item = new QStandardItem;
            item->setText(texts.at(i));
            item->setFlags(Qt::ItemIsUserCheckable| Qt::ItemIsEnabled);
            item->setData(Qt::Unchecked,Qt::CheckStateRole);
            model->setItem(row,0,item);
            this->setModel(model);
        }
    itemcount = model->rowCount();
    }
 
public slots:
    void updateText()
    {
        lineEdit()->setText(displayedit);
    }
 
private:
    QString str;
    QStandardItemModel *model;
    QStandardItemModel *temp;
    QStandardItem *item;
    QString displayedit;
    QStringList list;
    int itemcount;
    bool check;
};
 
#endif // MYCOMBOBOX_H

/*  mycombobox.h  */
#ifndef MYCOMBOBOX_H
#define MYCOMBOBOX_H

#include <QtGui>

class MyComboBox : public QComboBox
{
    Q_OBJECT
public:
    MyComboBox(QWidget *parent = 0) : QComboBox(parent)
    {
        setEditable(true);
        model = new QStandardItemModel;
        displayedit = "";
        itemcount = model->rowCount();
        updateText();
    }

    void showPopup()
    {
         temp = new QStandardItemModel;
    temp = model;

    /*
        if the user write somthing into the edit line, the new number of rows will be greater than the old number of rows:
            the new items has to be set as checkable items and every item should be only one time in the list
    */
    if(itemcount <temp->rowCount())
    {
        for (int row = 0; row<model->rowCount(); row++)         //for every item in the model set the new model
        {
            if(row == itemcount)
            {
                /*
                  Tests if more than one new item are added at the same time
                  */
                QString string = this->itemText(row);
                QString pattern("; ");
                QStringList datalist = string.split(pattern);

                /*
                    if only one item was add:
                        set the item checked and add it to the model
                */
                if (datalist.count() == 1)
                {
                    QStandardItem *newItem = new QStandardItem;
                    newItem->setText(datalist.at(0));
                    newItem->setFlags(Qt::ItemIsUserCheckable| Qt::ItemIsEnabled);
                    newItem->setData(Qt::Checked,Qt::CheckStateRole);
                    model->setItem(row,0,newItem);
                    row++;
                }

                /*
                    if more than one item was written in the edit line:
                        test for similarity with the items in the current list
                        and add every new item as new single item to the model and will be checked
                */
                else{
                    for (int size = 0; size<datalist.count(); size++ )
                    {
                        QList<QStandardItem*> list = temp->findItems(datalist.at(size));        //check for similarity
                        if(list.empty() == true)
                        {

                            QStandardItem *newItem = new QStandardItem;
                            newItem->setText(datalist.at(size));
                            newItem->setFlags(Qt::ItemIsUserCheckable| Qt::ItemIsEnabled);
                            newItem->setData(Qt::Checked,Qt::CheckStateRole);
                            model->setItem(row,0,newItem);
                            row++;
                        }

                    }
                }
            }

            /*
              in case, that only the current available items were checked
            */
            else {
                QStandardItem *newItem = new QStandardItem;
                newItem->setText(this->itemText(row));
                newItem->setFlags(Qt::ItemIsUserCheckable| Qt::ItemIsEnabled);
                if(temp->item(row,0)->checkState()  == Qt::Checked)
                {
                    newItem->setData(Qt::Checked,Qt::CheckStateRole);
                    qDebug()<<"blubb";
                }
                else newItem->setData(Qt::Unchecked,Qt::CheckStateRole);
                model->setItem(row,0,newItem);
            }
        }
    }

    // set the model of the combobox
    this->setModel(model);

    QComboBox::showPopup();

    // set the current number of items
    itemcount = model->rowCount();

    }
    void hidePopup()
    {
        displayedit = "";
        for(int i = 0; i<model->rowCount(); i++)
        {
            if(model->item(i,0)->checkState() == Qt::Checked)
            {
                displayedit = displayedit + model->item(i,0)->text() +"; ";
            }

        }
        QComboBox::hidePopup();
        QTimer::singleShot(0, this, SLOT(updateText()));
        this->setToolTip(displayedit);
    }

    void addItem(const QString &text/*, const QVariant &userData*/)
    {
        int row = model->rowCount();
        item = new QStandardItem;
        item->setText(text);
        item->setFlags(Qt::ItemIsUserCheckable| Qt::ItemIsEnabled);
        item->setData(Qt::Unchecked,Qt::CheckStateRole);
        model->setItem(row,0,item);
        this->setModel(model);
        itemcount = model->rowCount();
    }

    void addItems(const QStringList &texts){

        for (int i = 0; i <texts.count();i++)
        {
            int row = model->rowCount();
            item = new QStandardItem;
            item->setText(texts.at(i));
            item->setFlags(Qt::ItemIsUserCheckable| Qt::ItemIsEnabled);
            item->setData(Qt::Unchecked,Qt::CheckStateRole);
            model->setItem(row,0,item);
            this->setModel(model);
        }
    itemcount = model->rowCount();
    }

public slots:
    void updateText()
    {
        lineEdit()->setText(displayedit);
    }

private:
    QString str;
    QStandardItemModel *model;
    QStandardItemModel *temp;
    QStandardItem *item;
    QString displayedit;
    QStringList list;
    int itemcount;
    bool check;
};

#endif // MYCOMBOBOX_H

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