1 ACCEPTED SOLUTION
Accepted Solutions
Hi,
I see what you are doing wrong. The action when the button is clicked you set is "execute C++ code" and in the Code field you just call foo();, this function call will be generated in the generated file but this file has no knowledge about the definition of this function. Therefore you have this error.
The right approach is to set the action to "call new virtual function" then generate code.
Then you will see in the header of the generated file (for me it is Screen1ViewBase.hpp) :
/*
* Virtual Action Handlers
*/
virtual void user_button_clicked()
{
// Override and implement this function in Screen1
}Now you implement it in your files (mine are Screen1View.hpp and .cpp)
ScreenView.hpp
#ifndef SCREEN1VIEW_HPP
#define SCREEN1VIEW_HPP
#include <gui_generated/screen1_screen/Screen1ViewBase.hpp>
#include <gui/screen1_screen/Screen1Presenter.hpp>
class Screen1View : public Screen1ViewBase
{
public:
Screen1View();
virtual ~Screen1View() {}
virtual void setupScreen();
virtual void tearDownScreen();
virtual void user_button_clicked();
protected:
};
#endif // SCREEN1VIEW_HPPScreen1View.cpp
void Screen1View::user_button_clicked()
{
box1.setColor(Color::getColorFrom24BitRGB(255, 0, 0));
box1.invalidate();
}This should work as it works on my side.
/Alexandre
Hi,
I just tried what you suggested: I made a new project with a blank template for the particular board I stated earlier. I generated the project and changed only the things I mentioned above (I made the function foo this time around but I made sure to change it everywhere necessary). Other than the files that I put in my original post, do I need to change any others? I am very lost as to why this is not working. Any help would be greatly appreciated.
Hi,
I see what you are doing wrong. The action when the button is clicked you set is "execute C++ code" and in the Code field you just call foo();, this function call will be generated in the generated file but this file has no knowledge about the definition of this function. Therefore you have this error.
The right approach is to set the action to "call new virtual function" then generate code.
Then you will see in the header of the generated file (for me it is Screen1ViewBase.hpp) :
/*
* Virtual Action Handlers
*/
virtual void user_button_clicked()
{
// Override and implement this function in Screen1
}Now you implement it in your files (mine are Screen1View.hpp and .cpp)
ScreenView.hpp
#ifndef SCREEN1VIEW_HPP
#define SCREEN1VIEW_HPP
#include <gui_generated/screen1_screen/Screen1ViewBase.hpp>
#include <gui/screen1_screen/Screen1Presenter.hpp>
class Screen1View : public Screen1ViewBase
{
public:
Screen1View();
virtual ~Screen1View() {}
virtual void setupScreen();
virtual void tearDownScreen();
virtual void user_button_clicked();
protected:
};
#endif // SCREEN1VIEW_HPPScreen1View.cpp
void Screen1View::user_button_clicked()
{
box1.setColor(Color::getColorFrom24BitRGB(255, 0, 0));
box1.invalidate();
}This should work as it works on my side.
/Alexandre
I realize this is an old topic, but I am having issues doing this for a slider on a project generated by the TouchGFX Designer (4.24.1) and imported into Stm32CubieIDE (v1.16.0). I am using a Stm32F46-Disco board.
I setup an interaction, to call a virtual function:
Which does create a virtual function declaration in the base header file:
I then added a virtual declaration to my screen's hpp file:
And added the function to the cpp file. But I get the following error in the cpp when attempting to compile:
And yes, I did import the files into the Project Explorer from the filesystem so I could actually see them and edit them. The process of getting the files imported in the Project Explorer is very tedious when starting with a project generated from the TouchGFX Designer (to say the least). The folders of the project don't resemble the file system whatsoever (there are no "include" and "src" directories, for instance).
