Add Input functionality to Ultra

- Add point InSpace check to PD::Li::Math
- Add Universal AlignmentCenter flag for Horizontal and and Vertical Alignment
-  Add Fallbackfont to Layout (if you dont want to set font per object)
- Add Button Object WIP
- Rename OnHover to OnFocus and add OnUnfocus
- Move font and FontScale to ElementBase (for fallback logic etc)
- Add UpdateInput func to ElementBase
- Corectly Set fontScale in Text Rendering
- Update ecample

include/pd/ultra/elems/element.hpp

@@ -27,16 +27,32 @@ class PD_API ElementBase {
   void SetSize(const PD::fvec2& size) { pSize = size; }
   void SetSize(float w, float h) { pSize = PD::fvec2(w, h); }
   /**
-   * Executed every frame
+   * Executed on Hovering
    * Elemnents can override / discard this func
    */
-  virtual void OnHover(EventFunc func) { pHover = func; }
+  virtual void OnFocus(EventFunc func) { pHover = func; }
+  /**
+   * Executed on Mocing out of the space
+   * Elemnents can override / discard this func
+   */
+  virtual void OnUnFocus(EventFunc func) { pUnHover = func; }
   /**
    * Executrd on KeyUp event
    * Elemnents can override / discard this func
    */
   virtual void OnPress(EventFunc func) { pPress = func; }
 
+  void SetFontScale(float s = 1.f) { pFontScale = 1.f; }
+  float GetFontScale() const { return pFontScale; }
+
+  void SetFont(PD::Li::Font& font) { pFont = &font; }
+
+  void SetFontIfNull(PD::Li::Font& font) {
+    if (!pFont) pFont = &font;
+  }
+
+  virtual void UpdateInput();
+
  protected:
   friend class Container;
   void SetParent(Container* c) { pParent = c; }
@@ -48,7 +64,12 @@ class PD_API ElementBase {
   PD::fvec2 pSize;
   PD::Li::Rect pRenderspace;
   EventFunc pHover = nullptr;
+  EventFunc pUnHover = nullptr;
   EventFunc pPress = nullptr;
+  bool pFocued = false;
+  // Not used by every object btw
+  PD::Li::Font* pFont = nullptr;
+  float pFontScale = 1.f;
 };
 }  // namespace Ultra
 }  // namespace PD