/****** elements.h, defines various UI elements

******/
#ifndef ELEMENTS_H
#define ELEMENTS_H

#define STATE_NORMAL 0
#define STATE_PRESSED 1
#define STATE_HELD 2
#define STATE_DRAG 3
#define STATE_FOCUS 4

struct ElementList {
  struct Element *first;
  struct Element *last;
  void *user;
  void (*hook_newElement)();
  void (*hook_addElement)();
};

struct Element {
  int x;
  int y;
  int state;
  int type;
  int child_count;
  int gid;
  int id;
  struct Element *next;
  struct Element **children;
  void *data;
  void (*callback)();
  void *user;
  void *parent;
  void *sibling;
};

struct Element *newElement(int type);
void freeElement(struct Element *element);

#define HOOK_ADD 1

struct ElementList *newElementList();
void freeElementList(struct ElementList *list);
void addElementToList(struct ElementList *list, struct Element *element);
void removeElementFromList(struct ElementList *list, struct Element *element);
void deleteElementsFromList(struct ElementList *list);
void setElementListUser(struct ElementList *list, void *user);
void hookElementList(struct ElementList *list, int callback_id, void(*callback));

/* element type structs and such */
#define TYPE_TEXT 0
#define TYPE_BUTTON 1
#define TYPE_TEXT_INPUT 2
#define TYPE_IMAGE 3
#define TYPE_SPINNER 4

struct ButtonElement {
  int length;
  char *string;
};

struct SpinnerElement {
  int size;
  int cursor;
  int length;
  char *string;
  int value;
};

struct TextElement {
  int length;
  char *string;
};

struct TextInputElement {
  int size;
  int cursor;
  int length;
  char *string;
};

struct ImageElement {
  int width;
  int height;
  void *image;
};

int setElementText(struct Element *element, const char *string);
int setElementPosition(struct Element *element, int x, int y);
int setElementCallback(struct Element *element, void(*callback));
int setElementSize(struct Element *element, int size);
int setElementImage(struct Element *element, void *image, int width, int height);
int setElementValue(struct Element *element, int value);
int setElementUser(struct Element *element, void *user);
int setElementId(struct Element *element, int id);
int setElementGid(struct Element *element, int gid);
int setElementSibling(struct Element *element, struct Element *sibling);
int setElementParent(struct Element *element, struct Element *parent);
int addElementChild(struct Element *element, struct Element *child);
int removeElementChild(struct Element *element, struct Element *child);

const char *getElementText(struct Element *element);
int getElementValue(struct Element *element);
int handleInputElement(struct Element *element, int ch);
int handleMouseButton(struct Element *element, int button);

#endif