QStandardItemModel Help

[frenk_castle]

I have three tree views in my application and every view have its model which basically looks like this:

|
|
|--------Printer1
|             |
|             |------------Tray1
|             |                 |
|             |                 |----------Paper type
|             |                 |----------value
|             |                 |----------Amount
|             |                 |----------value
|             |
|             |------------Tray2
|                               |
|                               |----------Paper type
|                               |----------value
|                               |----------Amount
|                               |----------value
|
|--------Printer2
|             |
|             |------------Tray1
|             |                 |
|             |                 |----------Paper type
|             |                 |----------value
|             |                 |----------Amount
|             |                 |----------value
|             |
|             |------------Tray2
|                               |
|                               |----------Paper type
|                               |----------value
|                               |----------Amount
|                               |----------value
|
|--------Printer3
              |
              |------------Tray1
              |                 |
              |                 |----------Paper type
              |                 |----------value
              |                 |----------Amount
              |                 |----------value
              |
              |------------Tray2
                                |
                                |----------Paper type
                                |----------value
                                |----------Amount
                                |----------value

|
|
|--------Printer1
|             |
|             |------------Tray1
|             |                 |
|             |                 |----------Paper type
|             |                 |----------value
|             |                 |----------Amount
|             |                 |----------value
|             |
|             |------------Tray2
|                               |
|                               |----------Paper type
|                               |----------value
|                               |----------Amount
|                               |----------value
|
|--------Printer2
|             |
|             |------------Tray1
|             |                 |
|             |                 |----------Paper type
|             |                 |----------value
|             |                 |----------Amount
|             |                 |----------value
|             |
|             |------------Tray2
|                               |
|                               |----------Paper type
|                               |----------value
|                               |----------Amount
|                               |----------value
|
|--------Printer3
              |
              |------------Tray1
              |                 |
              |                 |----------Paper type
              |                 |----------value
              |                 |----------Amount
              |                 |----------value
              |
              |------------Tray2
                                |
                                |----------Paper type
                                |----------value
                                |----------Amount
                                |----------value

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I have a function which creates this empty model. Every value field is empty. I need to be able to do three things:

One: When the user chooses the type of paper he wants for a specific tray on a specific printer and the amount of paper he need I need to set the corresponding value fields.

Two: I need to reset the model, clear all values.

Three: I need to retrieve all values, for storing, printing etc.

I thought about making new model every time and copying it to the model that is associated to the view but I am not sure since model inherits QObject plus it doesn't solve my need number three. I am sure there is an answer in the documentation but so far I failed to find it. If somebody could help me save some time and tell me where to look for a class or a function to use it would really help me.

All I need is a way to set and get the value of the specific item in the model.

Thanks in advance.

[Coises]

All I need is a way to set and get the value of the specific item in the model.

Since you imply by the title that you’re using a QStandardItemModel, there are two ways you can access the data: you can employ the basic model/view technique and use QStandardItemModel::setData and QStandardItemModel::data; or you can follow the item-based approach and useQStandardItemModel::item or QStandardItemModel::itemFromIndex to access a QStandardItem and then use that class’s methods to proceed.

You can mix these approaches; QStandardItemModel is just a QAbstractItemModel that uses instances of QStandardItem as its data store. Sometimes one way of accessing the data may be simpler and sometimes the other.