SlideShowView.c File Reference

#include <assert.h>
#include <SDL3/SDL_timer.h>
#include "SlideShowView.h"

Go to the source code of this file.

Macros
#define	_Class   _SlideShowView

Functions
Class *	_SlideShowView (void)
static void	addImage (SlideShowView *self, Image *image)
static void	dealloc (Object *self)
static View *	init (View *self)
static void	initialize (Class *clazz)
static SlideShowView *	initWithFrame (SlideShowView *self, const SDL_Rect *frame)
static void	render (View *self, Renderer *renderer)

Macro Definition Documentation

_Class

#define _Class   _SlideShowView

Definition at line 30 of file SlideShowView.c.

Function Documentation

_SlideShowView()

Class * _SlideShowView

(

void

)

Definition at line 162 of file SlideShowView.c.

                            {
  static Class *clazz;
  static Once once;
 
  do_once(&once, {
    clazz = _initialize(&(const ClassDef) {
      .name = "SlideShowView",
      .superclass = _View(),
      .instanceSize = sizeof(SlideShowView),
      .interfaceOffset = offsetof(SlideShowView, interface),
      .interfaceSize = sizeof(SlideShowViewInterface),
      .initialize = initialize,
    });
  });
 
  return clazz;
}

addImage()

static void addImage ( SlideShowView *  self, Image *  image  )

static

Definition at line 106 of file SlideShowView.c.

                                                        {
 
  assert(image);
 
  $(self->images, addObject, image);
}

dealloc()

static void dealloc ( Object *  self )

static

See also

Object::dealloc(Object *)

Definition at line 37 of file SlideShowView.c.

                                  {
 
  SlideShowView *this = (SlideShowView *) self;
 
  release(this->images);
 
  super(Object, self, dealloc);
}

init()

static View * init ( View *  self )

static

See also

View::init(View *)

Definition at line 51 of file SlideShowView.c.

                              {
  return (View *) $((SlideShowView *) self, initWithFrame, NULL);
}

initialize()

static void initialize ( Class *  clazz )

static

See also

Class::initialize(Class *)

Definition at line 147 of file SlideShowView.c.

                                     {
 
  ((ObjectInterface *) clazz->interface)->dealloc = dealloc;
 
  ((ViewInterface *) clazz->interface)->render = render;
  ((ViewInterface *) clazz->interface)->init = init;
 
  ((SlideShowViewInterface *) clazz->interface)->addImage = addImage;
  ((SlideShowViewInterface *) clazz->interface)->initWithFrame = initWithFrame;
}

initWithFrame()

static SlideShowView * initWithFrame ( SlideShowView *  self, const SDL_Rect *  frame  )

static

Definition at line 117 of file SlideShowView.c.

                                                                                {
 
  self = (SlideShowView *) super(View, self, initWithFrame, frame);
  if (self) {
    self->images = $(alloc(Array), init);
    assert(self->images);
 
    self->slideDuration = 5000;
    self->fadeDuration = 1000;
 
    self->current = $(alloc(ImageView), initWithFrame, NULL);
    assert(self->current);
    $((View *) self, addSubview, (View *) self->current);
    release(self->current);
 
    self->next = $(alloc(ImageView), initWithFrame, NULL);
    assert(self->next);
    self->next->color.a = 0;
    $((View *) self, addSubview, (View *) self->next);
    release(self->next);
  }
 
  return self;
}

render()

static void render ( View *  self, Renderer *  renderer  )

static

See also

View::render(View *, Renderer *)

Definition at line 58 of file SlideShowView.c.

                                                   {
 
  super(View, self, render, renderer);
 
  SlideShowView *this = (SlideShowView *) self;
 
  const Array *images = (Array *) this->images;
  if (images->count == 0) {
    return;
  }
 
  const Uint64 now = SDL_GetTicks();
 
  if (this->current->image == NULL) {
    Image *first = $(images, firstObject);
    $(this->current, setImage, first);
    this->fadeEndedAt = now;
    return;
  }
 
  if (images->count < 2) {
    return;
  }
 
  if (this->fadeStartedAt) {
    const float frac = (float) (now - this->fadeStartedAt) / (float) this->fadeDuration;
    this->next->color.a = (Uint8) (SDL_min(frac, 1.f) * 255.f);
    if (frac >= 1.f) {
      $(this->current, setImage, this->next->image);
      $(this->next, setImage, NULL);
      this->next->color.a = 0;
      this->fadeStartedAt = 0;
      this->fadeEndedAt = now;
    }
  } else if (now - this->fadeEndedAt >= this->slideDuration) {
    this->index = (this->index + 1) % images->count;
    Image *image = $(images, objectAtIndex, this->index);
    $(this->next, setImage, image);
    this->fadeStartedAt = now;
  }
}