Like iphone confirmation slider

My projects
#1

slider

I modified the lv_silder.c file to achieve the effect of the IPHONE shutdown confirmation slider, if you do not modify the source file method, welcome to discuss with me

#2

Why was it required to modify lv_slider.c?

#3

Because I got an funny thing without modification
slider2

#4

Do you mean the strange radius of the indicator below the knob?

#5

yes,this is my modif start at linenums 310

    if(hor) {
        //knob_area->x1 -= (knob_size >> 1);
        knob_area->x1 -= (knob_size );
        if (knob_area->x1 < obj->coords.x1)
            knob_area->x1 = obj->coords.x1;
        knob_area->x2 = knob_area->x1 + knob_size - 1;
        knob_area->y1 = obj->coords.y1;
        knob_area->y2 = obj->coords.y2;
    }
    else {
        
       // knob_area->y1 -= (knob_size >> 1);
        knob_area->y1 -= (knob_size );
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Design "Slide to unlock" button in Squareline
How can i use silder implement a slider switch？
#6

Probably we could have a config option for it, but it show very well the beauty of using open-source libs: you can easily change 1-2 lines to get what need.

#7

Yes, it would be great to make it configurable, and I’m very grateful to the LVGL team for providing such a great open source UI framework. I’ve used LVGL on three commercial projects so far

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#8

So happy to hear that! :slight_smile:

#9

This should be pretty easy to get working without having to change the LVGL source code at all. Using the slider and setting the range to 0 - 100 and using an event for value changed and inside that callback check indev to see if the touch has been released and if it has and the value is < x then snap the slider back to zero otherwise snap it up to 100.

It is strange that the knob goes past the indicator. It shouldn’t be able to do that. I would need to see the exact code that is being run that causes it to do that.

#10

Yes, the problem is not the motion control part, as you said, it’s very simple. But in the LAYOUT section, the modified code has been posted ther