I am trying to create a ListBox where each ListItem is just some text. I can make it so if a ListItem goes off the ListBox’s height then don’t show it. This is just a simple if statement in my render function checking to see if the ListItem’s position is inside the ListBox’s rectangle.
I want to improve this by making the ListBox scrollable. So similar to the picture below, I should be able to partially see the ListItem if I start scrolling down until it’s fully in view.
How would I go about doing this? I’m thinking I would need some Camera and only render things inside the Camera’s rectangle. Though, I do not know how to begin this.
My current code just doesn’t render the ListItem if it goes off the ListBox’s rectangle:
class ListBox {
private:
std::vector<ListItem*> list_items;
public:
ListBox();
~ListBox();
void update();
void render();
}
void ListBox::render() {
// Loop through list items here
if(item->rectangle.h + item->rectangle.y <= this->rectangle.h + this->rectangle.y) {
item->render();
}
}
Without the if statement, it looks like this:
I want “Test: 8” and “Test: 9” to be hidden inside the white rectangle until I start to scroll down (where the items would start to be partially shown and the top ListItem’s would start to go off view like a normal scrolling area).
