Last edited item

[haldrik]

Hi, I have a form with many fields, and a findButton, I need make something for identify the last lineEdit edited when I press the findButton. This is for find matches on costumerId, costumerName, or costumerAddress, etc, without have to use a combobox with the possible search fields. Just clic on the lineEdit that you interested, type the string and clic on findButton.

Here a video

[AlexSudnik]

One of the ways is to store all of the editable QLineEdit objects' pointers in an index-based table ( hash for instance ) and use its' ids with a signal mapper.
Also , you'll probably want to use a distinct const pointer that will store this last edited QLineEdit : const QLineEdit* lastEditedField and a private slot void updateLastEditedField( ) connected with a signal mapper (which is connected with a void textChanged ( const QString & text ) signal of those QLineEdit objects ) , this way you'll get a caller's id to retrieve a pointer and set it as a "lastEditedField".

You can also do it withought any mapping involved , but in this case you'll have to use QObject* QObject::sender () const , but since you'll lose an object's type , you'll also have to make some casts , which i think is not smart.

[amleto]

I would say that the find button should take into consideration ALL of the data filled in on the form.

In any case, the form could provide a slot that gives the search data, e.g. a map of field name to string data QMap<QString, QString>.

// form with line edits cpp
void lineeditform::slotGiveSearchData(QMap<QString, QString>& data)
{
  // grab data from ui and put in map
}
 
//results.hpp - your widget with find button and search results
class results : QWidget
{
  Q_OBJECT
 ...
 
private slots:
 void slotFind();
 
signals:
  signalGetSearchData();
};
 
// results form cpp
results::results(...)
{
  // connect find button clicked() to slotFind() slot
  // connect signalGetSearchData to slotGiveSearchData on lineedit form
}
 
void results::slotFind()
{
  QMap<QString, QString> searchData;
  // use signal signalGetSearchData
  emit signalGetSearchData(searchData);
 
  // we now have the data.
 
  // Do your search...
}

// form with line edits cpp
void lineeditform::slotGiveSearchData(QMap<QString, QString>& data)
{
  // grab data from ui and put in map
}

//results.hpp - your widget with find button and search results
class results : QWidget
{
  Q_OBJECT
 ...

private slots:
 void slotFind();

signals:
  signalGetSearchData();
};

// results form cpp
results::results(...)
{
  // connect find button clicked() to slotFind() slot
  // connect signalGetSearchData to slotGiveSearchData on lineedit form
}

void results::slotFind()
{
  QMap<QString, QString> searchData;
  // use signal signalGetSearchData
  emit signalGetSearchData(searchData);

  // we now have the data.

  // Do your search...
}

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