Is it possible to dynamically add GUI-Objects?

Forum|Forum|7 years ago
March 13, 2019
13 replies
3671 views

Hi folks,

I'm trying to add a set of objects (in this case: a circle) to the GUI, as soon as the user presses a button. Therefore, I'm trying to execute the following code on the button press:

touchgfx::Circle circle2;
touchgfx::PainterRGB565 circle2Painter;
 
circle2.setPosition(309, 136, 90, 90);
circle2.setCenter(45, 45);
circle2.setRadius(40);
circle2.setLineWidth(10);
circle2.setArc(0, 280);
circle2.setCapPrecision(180);
 
circle2Painter.setColor(touchgfx::Color::getColorFrom24BitRGB(255, 255, 255));
circle2.setPainter(circle1Painter);
 
add(circle2);
circle2.invalidate();

As soon as the button is pressed, the system won't react anymore. The "clicked_button" bitmap is displayed, nothing else happens.

What am I missing out? Is it actually possible to add GUI-objects at runtime? Is the buffer to small?

Thanks for your help!

TouchGFX

This topic has been closed for replies.

Martin KJELDSEN

Principal III

Hi @t.albrecht,

Are you still having this problem? Did you try increasing the size of the buffer?

Martin KJELDSEN

Principal III

And it's possible to add objects at runtime as long as they are statically allocated (default). TouchGFX measures the size of your View/Presenter and will reuse that memory for other screens. Move the declaration of circle2 to your headerfile, the definition to setupScreen() of your view and then add it on button click.

Let me know.

ALin

Associate

Hello@Martin KJELDSEN

I had the same question, and I adopted the method you proposed. I wrote the declaration of circle on headerfile, and the definition on the function of button click. But I clicked the button, the circle didn't show on the screen.

What am I missing out. Are there other methods to add GUI-objects at runtime?

Thanks for you reply!