Insert fill circle into cell of QTableWidget
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@juaniyoalm
Hi
Well the delegate cannot go read into other external classes.
So you have to at some point take the values from the classes and
put into the model.
How often does those values change in the classes ?The parameters will change very often. There will be hundreds of instances of the class and the values will change.
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The problem is not in the number of instances but rather how you access them.
How are you currently handling these differed classes ?
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The program will be a simulation of the habitat of fungus and fungivores. I have a world class, which contains a matrix (world), and an array of fungivores. The matrix is composed of cell. The cell class contains an array of fungivores (fungivores that are in that cell) and an int that represents the amount of fungus there is. In the course of the execution the value of fungus and the number of fungivores that there will be in each cell will change. That's what I have to represent in the UI. The amount of fungus will represent it by painting the green cells, with an intensity between 0 and 255, depending on the value, and the amount of fungivors will represent it with a circle, the size of the circle will depend on the value. Once I have this sequential version, I will have to make a parallel version.
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The program will be a simulation of the habitat of fungus and fungivores. I have a world class, which contains a matrix (world), and an array of fungivores. The matrix is composed of cell. The cell class contains an array of fungivores (fungivores that are in that cell) and an int that represents the amount of fungus there is. In the course of the execution the value of fungus and the number of fungivores that there will be in each cell will change. That's what I have to represent in the UI. The amount of fungus will represent it by painting the green cells, with an intensity between 0 and 255, depending on the value, and the amount of fungivors will represent it with a circle, the size of the circle will depend on the value. Once I have this sequential version, I will have to make a parallel version.
@juaniyoalm
So can you keep those fungus-intensity-ints in (a column in) your model? Then your view can access it. -
Is the matrix a two dimensional table ?
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@SGaist
Yes, in each cell there is fungus (int value) and fungivores (array of fungivores).I've tried pass QPair or Qlist to QStandarItemModel but is not posible cast to qvariant
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What are you currently using to store that "matrix" ?
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Vector<Vector<Cell>>
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Some answer please???
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Please show some patience and allow 24 hours to run before bumping your own thread. This is a community forum where people answer on their own time. They might not even live in the same timezone as you.
As for your current trouble. You can build a QAbstractTableModel that will give access to your matrix. For the specific members of your
Cellclass, you can use custom roles. -
Please show some patience and allow 24 hours to run before bumping your own thread. This is a community forum where people answer on their own time. They might not even live in the same timezone as you.
As for your current trouble. You can build a QAbstractTableModel that will give access to your matrix. For the specific members of your
Cellclass, you can use custom roles.I'm sorry, it was my vacation day and I wanted to move forward with the project. I'm sorry.
To assign the matrix to the model simply the model creates a variable of the same type as the matrix and initialize the model I assign it in some way, is it correct? I do not understand the roles very well ...
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You should also provide APIs that will allow you ton modify that matrix.
As for the roles, they are there to retrieve specific information from the model's elements.
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@SGaist said in Insert fill circle into cell of QTableWidget:
You should also provide APIs that will allow you ton modify that matrix.
As for the roles, they are there to retrieve specific information from the model's elements.I'm sorry but I still do not understand well the models and roles in QT.
Can anyone give me an example of how the model class should be?I have a matrix (vector <vector <Cell >>) and when modifying some attributes of the Cell class, have to change what is painted in the graphic representation (Only the one in the cell corresponding to the coordinates of the matrix).
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@SGaist said in Insert fill circle into cell of QTableWidget:
You should also provide APIs that will allow you ton modify that matrix.
As for the roles, they are there to retrieve specific information from the model's elements.I'm sorry but I still do not understand well the models and roles in QT.
Can anyone give me an example of how the model class should be?I have a matrix (vector <vector <Cell >>) and when modifying some attributes of the Cell class, have to change what is painted in the graphic representation (Only the one in the cell corresponding to the coordinates of the matrix).
@juaniyoalm
Hi
Its something like this
https://meetingcpp.com/blog/items/an-introduction-into-qt-part-3.html
However he uses a
std::vector<PersonalData> mydata;
where you have
vector <vector <Cell >>
so you need to use both index.row and index.col
to address your matrix. ( the data) -
@juaniyoalm
Hi
Its something like this
https://meetingcpp.com/blog/items/an-introduction-into-qt-part-3.html
However he uses a
std::vector<PersonalData> mydata;
where you have
vector <vector <Cell >>
so you need to use both index.row and index.col
to address your matrix. ( the data) -
@mrjj Thanks so much.
I was doing it that way, but how did I assign the matrix to the model variable? At this moment, I am creating the matrix in mainwindow class ...
@juaniyoalm
Hi
well the vector <vector <Cell >> matrix could be inside the model
and you would use method like the Addperson in sample to fill it.
Much like you do now. when maxtrix is outside of the model.
You could also fill it in mainwindow and simply give whole matrix to model
to copy it to internal variable.(matrix) but thats a bit waste full.Also i been wanting to ask you. You do use a TableView because you need scrolling correct?
I mean there are far more rows with cells than can fit on on screen ? -
@juaniyoalm
Hi
well the vector <vector <Cell >> matrix could be inside the model
and you would use method like the Addperson in sample to fill it.
Much like you do now. when maxtrix is outside of the model.
You could also fill it in mainwindow and simply give whole matrix to model
to copy it to internal variable.(matrix) but thats a bit waste full.Also i been wanting to ask you. You do use a TableView because you need scrolling correct?
I mean there are far more rows with cells than can fit on on screen ? -
Yes, there is no row limit, it can be 20 rows, 100 or 1000 xD. I always have to think about what I do to behave well when I do the parallel implementation, using pthread and openmp.
@juaniyoalm
Ok so scrolling is needed:)
Also make sure to check out QtConcurrent and QThread before jumping to pthread. -
@juaniyoalm
Ok so scrolling is needed:)
Also make sure to check out QtConcurrent and QThread before jumping to pthread.ok, I will look it.
I have a doubt, when I modify a value of the Cell class (this is done in a method of the Cell class ), it will be modified automatically in the model or I have to do model-> setData (model-> index (i, j) , matrix [i] [j] -> getModifiedValue ())? The Cell of matrix are pointer...
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ok, I will look it.
I have a doubt, when I modify a value of the Cell class (this is done in a method of the Cell class ), it will be modified automatically in the model or I have to do model-> setData (model-> index (i, j) , matrix [i] [j] -> getModifiedValue ())? The Cell of matrix are pointer...
@juaniyoalm
Well if you go with QAbstractTableModel
your matrix IS the data so if you modify it
and call dataChanged (model call ) to let view know data has been altered.
