Skip to content
  • Categories
  • Recent
  • Tags
  • Popular
  • Users
  • Groups
  • Search
  • Get Qt Extensions
  • Unsolved
Collapse
Brand Logo
  1. Home
  2. Qt Development
  3. General and Desktop
  4. [Solved]Get value of checkbox in a qtableview
Forum Updated to NodeBB v4.3 + New Features

[Solved]Get value of checkbox in a qtableview

Scheduled Pinned Locked Moved General and Desktop
13 Posts 4 Posters 12.0k Views 1 Watching
  • Oldest to Newest
  • Newest to Oldest
  • Most Votes
Reply
  • Reply as topic
Log in to reply
This topic has been deleted. Only users with topic management privileges can see it.
  • G Offline
    G Offline
    giesbert
    wrote on last edited by
    #2

    Hi,

    from your code, it's not clear what you want to achieve. It does not fir to the question.
    Inside the code, you iterate all selected cells in column 5 and set the background color. Where comes the checked state into the game?

    Nokia Certified Qt Specialist.
    Programming Is Like Sex: One mistake and you have to support it for the rest of your life. (Michael Sinz)

    1 Reply Last reply
    0
    • A Offline
      A Offline
      andre
      wrote on last edited by
      #3

      If you want to query the checked state of a model, simply use the correct data role Qt::CheckStateRole, which returns a QVariant containing a Qt::CheckState.

      However, it seems that you want to simply try to modify the rendering of checked items to give them a background color. That can be done more efficiently using a [[doc:QItemDelegate]].

      1 Reply Last reply
      0
      • T Offline
        T Offline
        toho71
        wrote on last edited by
        #4

        bq. However, it seems that you want to simply try to modify the rendering of checked items to give them a background color. That can be done more efficiently using a QItemDelegate.

        I want to check the state of the checkbox and it is in the 5 th column.
        if the state is true/checked I want to change color of that row.

        And i also want to se the total rows in the model.
        Is it possible.

        I'd like some simple exampels if there are some around.

        1 Reply Last reply
        0
        • G Offline
          G Offline
          goetz
          wrote on last edited by
          #5

          For the background, use a [[Doc:QStyledItemDelegate]] subclass, as Andre suggested. Override the paint() method, check the row/column and data and put the changed background into the options and call the base class implementation in the end:

          @
          void MyItemDelegate::paint( QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index )
          {
          QStyleOptionViewItemV4 newOption(option);
          if(index.row() == 5) {
          if(index.data(Qt::CheckStateRole) == Qt::Checked) {
          newOption.backgroundBrush = QBrush(Qt::yellow);
          }
          }
          QStyledItemDelegate::paint(painter, newOption, index);
          }
          @

          (Brain to terminal, code is not tested)

          You get the total number of rows using model->rowCount().

          http://www.catb.org/~esr/faqs/smart-questions.html

          1 Reply Last reply
          0
          • T Offline
            T Offline
            toho71
            wrote on last edited by
            #6

            Thanks I'll try

            1 Reply Last reply
            0
            • T Offline
              T Offline
              toho71
              wrote on last edited by
              #7

              Yes i worked but i want to loop thru the datamodel and check all checkboxes.
              I thought i did that with my foreach but sometimes i got the right rowcount and the loop dosent work and sometimes i go thru the loop but only on one row.

              1 Reply Last reply
              0
              • G Offline
                G Offline
                goetz
                wrote on last edited by
                #8

                The loop is executed by the view, it calls the delegate with the needed indexes.

                http://www.catb.org/~esr/faqs/smart-questions.html

                1 Reply Last reply
                0
                • T Offline
                  T Offline
                  toho71
                  wrote on last edited by
                  #9

                  I'll explain this in a new way.
                  After i put all my values in the model()(QStandardItemModel)
                  I put the model in the tableview.

                  When this is done I try to loop thru the datamodel and tries to check if the

                  @item->setFlags(Qt::ItemIsEnabled|Qt::ItemIsUserCheckable);
                  @
                  is checked.

                  If so I want to change color of that row.

                  thats why I want to loop thru this.

                  I'm sure that this is a simple task but I'm stuck now

                  1 Reply Last reply
                  0
                  • A Offline
                    A Offline
                    andre
                    wrote on last edited by
                    #10

                    OK, so you want to color a complete row based on a set of conditions. Sounds like a job for a proxy model to me.

                    Something like:

                    @
                    //hightlightproxy.h
                    //in Qt 4.8, you should use QIdentityProxyModel (I think it is called, please check).

                    #if QT_VERSION >= 0x040800
                    #include <QIndentityProxy>
                    class HighLightProxy : public QIdentityProxyModel
                    {
                    typedef baseClass QIdentityProxyModel;
                    #else
                    #include <QSortFilterProxyModel>
                    class HighLightProxy : public QSortFilterProxyModel
                    {
                    typedef baseClass QSortFilterProxyModel;
                    #endif
                    Q_OBJECT

                    public:
                    HighLightProxy(QObject* parent = 0);

                    void setRow(int row);
                    void setCheckColumn(column);
                    void setHighlightBrush(const QBrush& brush);
                    
                    virtual QVariant data(const QModelIndex & index, int role = Qt::DisplayRole ) const;
                    

                    private:
                    int m_row;
                    int m_checkColumn;
                    QBrush m_brush;
                    }
                    @

                    @
                    //hightlightproxy.cpp
                    HighLightProxy::HighLightProxy(QObject* parent) :
                    baseClass(parent),
                    m_row(-1),
                    m_checkColumn(-1)
                    {}

                    QVariant HighLightProxy::data(const QModelIndex & index, int role ) const
                    {
                    if (!index.isValid())
                    return QVariant();

                    //lets assume you are not talking about a tree-type model here, and ignore parents
                    if (index.row() == m_row && role == Qt::BackGroundRole) {
                    //check the checkstate
                    if (m_checkColumn > -1) {
                    QModelIndex sIndex = sourceModel()->index(m_row, m_checkColumn);
                    if (sIndex.data(Qt::CheckStateRole).toInt() == Qt::Checked) {
                    return m_highlightBrush;
                    }
                    }
                    }
                    return baseClass::data(index, role);
                    }

                    //implementation of setters declared in header is trivial and thus not shown.
                    @

                    Note: written in forum editor, not complete, nor tested in a compiler.

                    1 Reply Last reply
                    0
                    • T Offline
                      T Offline
                      toho71
                      wrote on last edited by
                      #11

                      I'll try this but I'm stuck with how to loop thru the tableview or datamodel to.
                      @foreach(datamodel,???)
                      {
                      code.....
                      ]
                      @
                      A simpel loop but Not in my head for the moment.

                      pls help

                      1 Reply Last reply
                      0
                      • A Offline
                        A Offline
                        andre
                        wrote on last edited by
                        #12

                        With the approach above, you don't need to loop through the view or the model.

                        1 Reply Last reply
                        0
                        • T Offline
                          T Offline
                          toho71
                          wrote on last edited by
                          #13

                          Thanks for the code and its OK

                          No problems after a while.

                          1 Reply Last reply
                          0

                          • Login

                          • Login or register to search.
                          • First post
                            Last post
                          0
                          • Categories
                          • Recent
                          • Tags
                          • Popular
                          • Users
                          • Groups
                          • Search
                          • Get Qt Extensions
                          • Unsolved