Checkbox.c

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/*
 * ObjectivelyMVC: Object oriented MVC framework for SDL3 and C.
 * Copyright (C) 2014 Jay Dolan <jay@jaydolan.com>
 *
 * This software is provided 'as-is', without any express or implied
 * warranty. In no event will the authors be held liable for any damages
 * arising from the use of this software.
 *
 * Permission is granted to anyone to use this software for any purpose,
 * including commercial applications, and to alter it and redistribute it
 * freely, subject to the following restrictions:
 *
 * 1. The origin of this software must not be misrepresented; you must not
 * claim that you wrote the original software. If you use this software
 * in a product, an acknowledgment in the product documentation would be
 * appreciated but is not required.
 *
 * 2. Altered source versions must be plainly marked as such, and must not be
 * misrepresented as being the original software.
 *
 * 3. This notice may not be removed or altered from any source distribution.
 */
 
#include <assert.h>
 
#include "Checkbox.h"
 
#include "../Assets/check.png.h"
 
#define _Class _Checkbox
 
static Image *_check;
 
#pragma mark - Object
 
static void dealloc(Object *self) {
 
  Checkbox *this = (Checkbox *) self;
 
  memset(&this->delegate, 0, sizeof(this->delegate));
 
  release(this->box);
  release(this->check);
 
  super(Object, self, dealloc);
}
 
#pragma mark - View
 
static void awakeWithDictionary(View *self, const Dictionary *dictionary) {
 
  super(View, self, awakeWithDictionary, dictionary);
 
  Checkbox *this = (Checkbox *) self;
 
  const Inlet inlets[] = MakeInlets(
    MakeInlet("check", InletTypeView, &this->check, NULL)
  );
 
  $(self, bind, inlets, dictionary);
}
 
static View *init(View *self) {
  return (View *) $((Checkbox *) self, initWithFrame, NULL);
}
 
#pragma mark - Control
 
static bool captureEvent(Control *self, const SDL_Event *event) {
 
  Checkbox *this = (Checkbox *) self;
 
  View *view = (View *) self;
 
  const View *box = (View *) this->box;
 
  switch (event->type) {
    case SDL_EVENT_MOUSE_BUTTON_DOWN:
      if ($(box, didReceiveEvent, event)) {
        self->state |= ControlStateHighlighted;
        return true;
      }
      break;
    case SDL_EVENT_MOUSE_BUTTON_UP:
      if ($(box, didReceiveEvent, event)) {
        self->state ^= ControlStateSelected;
        self->state &= ~ControlStateHighlighted;
        if (this->delegate.didToggle) {
          this->delegate.didToggle(this);
        }
        $(view, emitViewEvent, ViewEventChange, NULL);
        return true;
      }
      break;
    case SDL_EVENT_KEY_DOWN:
      switch (event->key.key) {
        case SDLK_SPACE:
        case SDLK_KP_SPACE:
        case SDLK_RETURN:
        case SDLK_KP_ENTER:
          self->state ^= ControlStateSelected;
          self->state &= ~ControlStateHighlighted;
          if (this->delegate.didToggle) {
            this->delegate.didToggle(this);
          }
          $(view, emitViewEvent, ViewEventChange, NULL);
          return true;
      }
  }
 
  return super(Control, self, captureEvent, event);
}
 
#pragma mark - Checkbox
 
static Checkbox *initWithFrame(Checkbox *self, const SDL_Rect *frame) {
 
  self = (Checkbox *) super(Control, self, initWithFrame, frame);
  if (self) {
 
    self->box = $(alloc(Control), initWithFrame, frame);
    assert(self->box);
 
    self->box->view.alignment = ViewAlignmentMiddleCenter;
 
    self->check = $(alloc(ImageView), initWithImage, _check);
    assert(self->check);
 
    self->check->view.autoresizingMask = ViewAutoresizingFill;
 
    $((View *) self->box, addSubview, (View *) self->check);
    $((View *) self, addSubview, (View *) self->box);
  }
 
  return self;
}
 
#pragma mark - Class lifecycle
 
static void initialize(Class *clazz) {
 
  ((ObjectInterface *) clazz->interface)->dealloc = dealloc;
 
  ((ViewInterface *) clazz->interface)->awakeWithDictionary = awakeWithDictionary;
  ((ViewInterface *) clazz->interface)->init = init;
 
  ((ControlInterface *) clazz->interface)->captureEvent = captureEvent;
 
  ((CheckboxInterface *) clazz->interface)->initWithFrame = initWithFrame;
 
  _check = $(alloc(Image), initWithBytes, check_png, check_png_len - 1);
}
 
static void destroy(Class *clazz) {
  release(_check);
}
 
Class *_Checkbox(void) {
  static Class *clazz;
  static Once once;
 
  do_once(&once, {
    clazz = _initialize(&(const ClassDef) {
      .name = "Checkbox",
      .superclass = _Control(),
      .instanceSize = sizeof(Checkbox),
      .interfaceOffset = offsetof(Checkbox, interface),
      .interfaceSize = sizeof(CheckboxInterface),
      .initialize = initialize,
      .destroy = destroy,
    });
  });
 
  return clazz;
}
 
#undef _Class