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45 lines
2.4 KiB
45 lines
2.4 KiB
//This is the central structure that is supposed to make this library be useful.
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//It is essentially a rose-tree structure that is traversed in a depth-first-esque manner.
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//When rendering, the tree is traversed in "left to right" fashion, rendering everything things as it goes.
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//When clicking, the tree is traversed in "right to left" fashion and stops at the first eligible object.
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//Possible todo: add usage of nifty means to figure out at runtime when updates are made to structure,
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// which objects don't need to be rendered at all and keep track of that by managing the tree structure more closely.
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//That might require some trickery, depending on how the management of this structure pans out.
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#ifndef SDL_CLICKY_CLICKABLE_HIERARCHY_H_
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#define SDL_CLICKY_CLICKABLE_HIERARCHY_H_
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#include "clickable.h"
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struct Clickable_Hierarchy_Element;
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//Simply a list of subtress that may be leaves.
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typedef struct {
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int num_children;
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int num_children_slots;
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struct Clickable_Hierarchy_Element* children;
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} Clickable_Hierarchy;
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//This one requires explanation.
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//The clickable should be self-explanatory, this is the clickable that this element represents.
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//The subtree, though, determines if this is a leaf (NULL) or not (!NULL). If !NULL, then the clickable is a container object.
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//How to use this, from a clickable and container perspective?
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// Clickable: Just add it and the subtree will be NULL.
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// Container: If your container only renders itself then it should add all of its subelements to the tree.
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// If it recursively renders all of its own subelements, then it should not add those to the tree because the tree would render them too.
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// That means, if you handle the rendering of subelements, just pretend to only be a clickable.
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// If you have a mix for some reason, register as a container but only add the subelements you don't handle yourself.
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typedef struct Clickable_Hierarchy_Element {
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Clickable* clickable;
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Clickable_Hierarchy* subtree;
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} Clickable_Hierarchy_Element;
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void Clicky_Clickable_Hierarchy_Render(Clickable_Hierarchy* ch, SDL_Renderer* r);
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bool Clicky_Clickable_Hierarchy_Click(Clickable_Hierarchy* ch, int x, int y);
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int Clicky_Clickable_Hierarchy_Add_Clickable(Clickable_Hierarchy* ch, Clickable* cl);
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Clickable_Hierarchy* Clicky_Clickable_Hierarchy_Add_Subtree(Clickable_Hierarchy* ch, Clickable* cl, int numchildren);
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#endif // SDL_CLICKY_CLICKABLE_HIERARCHY_H_
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