The use of displayText function

Piriziwè

I would like to display a text at the same position as atoms (e.g: display three atoms' serial number). I looked at displayText(std::string text, const SBPosition3 &position, std::string fontFamily, int fontSize, float ∗ color) function but I have some compilation errors. Please, would you mind giving me an example of using this function?

Stephane

Starting with SAMSON 0.6.0, the displayText function takes a QFont instead of a std::string (see the SAMSON class in SDK/0.6.0/include/Facade/SAMSON/SAMSON.hpp, or the documentation at https://documentation.samson-connect.net), to give developers more control. An example would thus be to include the following lines in the display function of e.g. a visual model (derived from SBVisualModel) or a label (derived from SBLabel):

float color[4] = { 1.0, 1.0, 0.5, 1.0 }; // red, green, blue, alpha
SAMSON::displayText("Hello world", SBPosition3(SBQuantity::angstrom(0.0), SBQuantity::angstrom(0.0), SBQuantity::angstrom(0.0)), QFont("Segoe UI", 60, 200), color);

This would produce the following text at the origin:

Piriziwè

@stephane-redon Thank you, Sir. It is really helpful

Piriziwè

@stephane-redon I tried with a visual model and this is what I got as result:

I would like to get this kind of result (for instance: put on each atom its serial number):

Is it possible? I am looking for the way to add a label like SAMSON ruler element does.

Thank you in advance

Stephane

Could you please check to see what happens when you add an atom in the document? There might be an issue when you only have a visual model that displays text, and nothing else. Once this works, it should be easy to position the text on the atoms by sending their position to the displayText function.

Piriziwè

Hi @stephane-redon, sorry for my late response. When I add atoms, nothing happens, they are correctly added.

I have a visual model that displays arrow on atoms. It reads coordinates from a file and then displays arrows. My problem is that I would like to displays arrows when the user clicks on a button. I tried the way a structural model is added to the active layer programmatically but it does not work. Please, would mind helping me with it?

This is just an inspiration from how a structural model is added:

SBMVisualModel* visualModel = new SBMVisualModel();
visualModel->setName("VP_Arrows");

SAMSON::beginHolding("Display vp by arrows");

SEFleXibleVisualModel vModel; // this is my visual model
vModel.fileName = vp_file; // this is to set the coordinates file

//visualModel.display(); // I don't know if I need to call this method or not
visualModel->addChild(vModel); // add my visual model to the SBMVisualModel

visualModel->create();
SAMSON::getActiveLayer()->addChild(visualModel); // add to the active layer

If this is solved I think I could then display atoms' serial numbers

Thank you in advance.

Piriziwè

@Stephane-Redon, it's done :) Thanks. Here's what I did:

SEFleXibleVisualModel* model = new SEFleXibleVisualModel(vp_file, "vp"); // my visual model
model->setName("VP_Arrows");

SAMSON::beginHolding("Display vp by arrows");
SAMSON::hold(model);

model->create();
SAMSON::getActiveLayer()->addChild(model);

// stop holding changes to the document
SAMSON::endHolding();