CollectionView.c File Reference

#include <assert.h>
#include <math.h>
#include "CollectionView.h"

Go to the source code of this file.

Macros
#define	_Class   _CollectionView

Functions
Class *	_CollectionView (void)
static void	applyStyle (View *self, const Style *style)
static bool	captureEvent (Control *self, const SDL_Event *event)
static void	dealloc (Object *self)
static void	deselectAll (CollectionView *self)
static void	deselectAll_enumerate (const Array *array, ident obj, ident data)
	ArrayEnumerator for all item deselection.
static void	deselectItemAtIndexPath (CollectionView *self, const IndexPath *indexPath)
static void	deselectItemsAtIndexPaths (CollectionView *self, const Array *indexPaths)
static void	deselectItemsAtIndexPaths_enumerate (const Array *array, ident obj, ident data)
	ArrayEnumerator for item deselection.
static IndexPath *	indexPathForItem (const CollectionView *self, const CollectionItemView *item)
static IndexPath *	indexPathForItemAtPoint (const CollectionView *self, const SDL_Point *point)
static View *	init (View *self)
static void	initialize (Class *clazz)
static CollectionView *	initWithFrame (CollectionView *self, const SDL_Rect *frame)
static CollectionItemView *	itemAtIndexPath (const CollectionView *self, const IndexPath *indexPath)
static void	layoutSubviews (View *self)
static SDL_Size	naturalSize (const CollectionView *self)
static void	reloadData (CollectionView *self)
static void	reloadData_removeItems (const Array *array, ident obj, ident data)
	ArrayEnumerator to remove CollectionItemViews from the collection's contentView.
static void	selectAll (CollectionView *self)
static void	selectAll_enumerate (const Array *array, ident obj, ident data)
	ArrayEnumerator for all item selection.
static Array *	selectionIndexPaths (const CollectionView *self)
static void	selectItemAtIndexPath (CollectionView *self, const IndexPath *indexPath)
static void	selectItemsAtIndexPaths (CollectionView *self, const Array *indexPaths)
static void	selectItemsAtIndexPaths_enumerate (const Array *array, ident obj, ident data)
	ArrayEnumerator for item selection.

Variables
const EnumName	CollectionViewAxisNames []

Macro Definition Documentation

_Class

#define _Class   _CollectionView

Definition at line 34 of file CollectionView.c.

Function Documentation

_CollectionView()

Class * _CollectionView

(

void

)

Definition at line 542 of file CollectionView.c.

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

applyStyle()

static void applyStyle ( View *  self, const Style *  style  )

static

See also

View::applyStyle(View *, const Style *)

Definition at line 59 of file CollectionView.c.

                                                       {
 
  super(View, self, applyStyle, style);
 
  CollectionView *this = (CollectionView *) self;
 
  const Inlet inlets[] = MakeInlets(
    MakeInlet("axis", InletTypeEnum, &this->axis, (ident) CollectionViewAxisNames),
    MakeInlet("item-size", InletTypeSize, &this->itemSize, NULL),
    MakeInlet("item-spacing", InletTypeSize, &this->itemSpacing, NULL)
  );
 
  $(self, bind, inlets, (Dictionary *) style->attributes);
}

captureEvent()

static bool captureEvent ( Control *  self, const SDL_Event *  event  )

static

See also

Control::captureEvent(Control *, const SDL_Event *)

Definition at line 129 of file CollectionView.c.

                                                                {
 
  if (event->type == SDL_EVENT_MOUSE_BUTTON_UP) {
 
    CollectionView *this = (CollectionView *) self;
 
    if ($((Control *) this->scrollView, isHighlighted) == false) {
      if ($((View *) this->contentView, didReceiveEvent, event)) {
 
        const SDL_Point point = {
          .x = event->button.x,
          .y = event->button.y
        };
 
        IndexPath *indexPath = $(this, indexPathForItemAtPoint, &point);
 
        const CollectionItemView *item = $(this, itemAtIndexPath, indexPath);
        if (item) {
 
          switch (self->selection) {
            case ControlSelectionNone:
              break;
            case ControlSelectionSingle:
              if (item->isSelected == false) {
                $(this, deselectAll);
                $(this, selectItemAtIndexPath, indexPath);
              }
              break;
            case ControlSelectionMultiple:
              if (SDL_GetModState() & (SDL_KMOD_CTRL | SDL_KMOD_GUI)) {
                if (item->isSelected) {
                  $(this, deselectItemAtIndexPath, indexPath);
                } else {
                  $(this, selectItemAtIndexPath, indexPath);
                }
              } else {
                $(this, deselectAll);
                $(this, selectItemAtIndexPath, indexPath);
              }
              break;
          }
 
          if (this->delegate.didModifySelection) {
            Array *selectionIndexPaths = $(this, selectionIndexPaths);
 
            this->delegate.didModifySelection(this, selectionIndexPaths);
 
            release(selectionIndexPaths);
          }
        }
 
        release(indexPath);
        return true;
      }
    }
  }
 
  return super(Control, self, captureEvent, event);
}

dealloc()

static void dealloc ( Object *  self )

static

See also

Object::dealloc(Object *)

Definition at line 41 of file CollectionView.c.

                                  {
 
  CollectionView *this = (CollectionView *) self;
 
  memset(&this->delegate, 0, sizeof(this->delegate));
 
  release(this->contentView);
  release(this->items);
  release(this->scrollView);
 
  super(Object, self, dealloc);
}

deselectAll()

static void deselectAll ( CollectionView *  self )

static

Definition at line 202 of file CollectionView.c.

                                              {
  $((Array *) self->items, enumerate, deselectAll_enumerate, NULL);
}

deselectAll_enumerate()

static void deselectAll_enumerate ( const Array *  array, ident  obj, ident  data  )

static

ArrayEnumerator for all item deselection.

Definition at line 194 of file CollectionView.c.

                                                                             {
  $((CollectionItemView *) obj, setSelected, false);
}

deselectItemAtIndexPath()

static void deselectItemAtIndexPath ( CollectionView *  self, const IndexPath *  indexPath  )

static

Definition at line 210 of file CollectionView.c.

                                                                                      {
 
  if (indexPath) {
    CollectionItemView *item = $(self, itemAtIndexPath, indexPath);
    if (item) {
      $(item, setSelected, false);
      $(self->contentView, invalidateStyle);
    }
  }
}

deselectItemsAtIndexPaths()

static void deselectItemsAtIndexPaths ( CollectionView *  self, const Array *  indexPaths  )

static

Definition at line 232 of file CollectionView.c.

                                                                                     {
 
  if (indexPaths) {
    $(indexPaths, enumerate, deselectItemsAtIndexPaths_enumerate, self);
  }
}

deselectItemsAtIndexPaths_enumerate()

static void deselectItemsAtIndexPaths_enumerate ( const Array *  array, ident  obj, ident  data  )

static

ArrayEnumerator for item deselection.

Definition at line 224 of file CollectionView.c.

                                                                                           {
  $((CollectionItemView *) obj, setSelected, false);
}

indexPathForItem()

static IndexPath * indexPathForItem ( const CollectionView *  self, const CollectionItemView *  item  )

static

Definition at line 283 of file CollectionView.c.

                                                                                               {
 
  const ssize_t index = $((Array *) self->items, indexOfObject, (ident) item);
  if (index > -1) {
    return $(alloc(IndexPath), initWithIndex, index);
  }
 
  return NULL;
}

indexPathForItemAtPoint()

static IndexPath * indexPathForItemAtPoint ( const CollectionView *  self, const SDL_Point *  point  )

static

Definition at line 243 of file CollectionView.c.

                                                                                              {
 
  if (self->itemSize.w && self->itemSize.h) {
 
    const SDL_Rect frame = $(self->contentView, renderFrame);
 
    const int itemWidth = self->itemSize.w + self->itemSpacing.w;
    const int itemHeight = self->itemSize.h + self->itemSpacing.h;
 
    const int rows = max(1, frame.h / itemHeight);
    const int cols = max(1, frame.w / itemWidth);
 
    const int x = point->x - frame.x;
    const int y = point->y - frame.y;
 
    const int row = y / itemHeight;
    const int col = x / itemWidth;
 
    int index;
    switch (self->axis) {
      case CollectionViewAxisVertical:
        index = row * cols + col;
        break;
      case CollectionViewAxisHorizontal:
        index = col * rows + row;
        break;
    }
 
    if (index < (int) self->items->count) {
      return $(alloc(IndexPath), initWithIndex, index);
    }
  }
 
  return NULL;
}

init()

static View * init ( View *  self )

static

See also

View::init(View *)

Definition at line 77 of file CollectionView.c.

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

initialize()

static void initialize ( Class *  clazz )

static

See also

Class::initialize(Class *)

Definition at line 513 of file CollectionView.c.

                                     {
 
  ((ObjectInterface *) clazz->interface)->dealloc = dealloc;
 
  ((ViewInterface *) clazz->interface)->applyStyle = applyStyle;
  ((ViewInterface *) clazz->interface)->init = init;
  ((ViewInterface *) clazz->interface)->layoutSubviews = layoutSubviews;
 
  ((ControlInterface *) clazz->interface)->captureEvent = captureEvent;
 
  ((CollectionViewInterface *) clazz->interface)->deselectAll = deselectAll;
  ((CollectionViewInterface *) clazz->interface)->deselectItemAtIndexPath = deselectItemAtIndexPath;
  ((CollectionViewInterface *) clazz->interface)->deselectItemsAtIndexPaths = deselectItemsAtIndexPaths;
  ((CollectionViewInterface *) clazz->interface)->indexPathForItem = indexPathForItem;
  ((CollectionViewInterface *) clazz->interface)->indexPathForItemAtPoint = indexPathForItemAtPoint;
  ((CollectionViewInterface *) clazz->interface)->initWithFrame = initWithFrame;
  ((CollectionViewInterface *) clazz->interface)->itemAtIndexPath = itemAtIndexPath;
  ((CollectionViewInterface *) clazz->interface)->naturalSize = naturalSize;
  ((CollectionViewInterface *) clazz->interface)->reloadData = reloadData;
  ((CollectionViewInterface *) clazz->interface)->selectAll = selectAll;
  ((CollectionViewInterface *) clazz->interface)->selectionIndexPaths = selectionIndexPaths;
  ((CollectionViewInterface *) clazz->interface)->selectItemAtIndexPath = selectItemAtIndexPath;
  ((CollectionViewInterface *) clazz->interface)->selectItemsAtIndexPaths = selectItemsAtIndexPaths;
}

initWithFrame()

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

static

Definition at line 297 of file CollectionView.c.

                                                                                  {
 
  self = (CollectionView *) super(Control, self, initWithFrame, frame);
  if (self) {
    self->items = $$(Array, array);
    assert(self->items);
 
    self->contentView = $(alloc(View), initWithFrame, NULL);
    assert(self->contentView);
 
    $(self->contentView, addClassName, "contentView");
    $(self->contentView, addClassName, "container");
 
    self->scrollView = $(alloc(ScrollView), initWithFrame, NULL);
    assert(self->scrollView);
 
    $(self->scrollView, setContentView, self->contentView);
    $((View *) self, addSubview, (View *) self->scrollView);
  }
 
  return self;
}

itemAtIndexPath()

static CollectionItemView * itemAtIndexPath ( const CollectionView *  self, const IndexPath *  indexPath  )

static

Definition at line 324 of file CollectionView.c.

                                                                                                   {
 
  if (indexPath) {
    const Array *items = (Array *) self->items;
    const size_t index = $(indexPath, indexAtPosition, 0);
 
    if (index < items->count) {
      return $(items, objectAtIndex, index);
    }
  }
 
  return NULL;
}

layoutSubviews()

static void layoutSubviews ( View *  self )

static

See also

View::layoutSubviews(View *)

Definition at line 84 of file CollectionView.c.

                                       {
 
  CollectionView *this = (CollectionView *) self;
 
  super(View, self, layoutSubviews);
 
  const SDL_Rect bounds = $((View *) this->scrollView, bounds);
 
  int x = bounds.x, y = bounds.y;
 
  const Array *items = (Array *) this->items;
  for (size_t i = 0; i < items->count; i++) {
 
    CollectionItemView *item = (CollectionItemView *) $(items, objectAtIndex, i);
 
    $((View *) item, resize, &this->itemSize);
    $((View *) item, layoutIfNeeded);
 
    item->view.frame.x = x;
    item->view.frame.y = y;
 
    switch (this->axis) {
      case CollectionViewAxisVertical:
        x += this->itemSize.w + this->itemSpacing.w;
        if (x + this->itemSize.w > bounds.w) {
          y += this->itemSize.h + this->itemSpacing.h;
          x = bounds.x;
        }
        break;
      case CollectionViewAxisHorizontal:
        y += this->itemSize.h + this->itemSpacing.h;
        if (y + this->itemSize.h > bounds.h) {
          x += this->itemSize.w + this->itemSpacing.w;
          y = bounds.y;
        }
        break;
    }
  }
}

naturalSize()

static SDL_Size naturalSize ( const CollectionView *  self )

static

Definition at line 342 of file CollectionView.c.

                                                        {
 
  ViewPadding padding = MakePadding(0, 0, 0, 0);
  padding = AddPadding(padding, ((View *) self)->padding);
  padding = AddPadding(padding, ((View *) self->scrollView)->padding);
  padding = AddPadding(padding, ((View *) self->contentView)->padding);
 
  SDL_Size size = MakeSize(padding.left + padding.right, padding.top + padding.bottom);
 
  View *scrollView = (View *) self->scrollView;
  SDL_Size scrollViewSize;
  if (scrollView->autoresizingMask & ViewAutoresizingContain) {
    scrollViewSize = $(scrollView, sizeThatContains);
  } else if (scrollView->autoresizingMask & ViewAutoresizingFit) {
    scrollViewSize = $(scrollView, sizeThatFits);
  } else {
    scrollViewSize = $(scrollView, size);
  }
 
  switch (self->axis) {
    case CollectionViewAxisVertical: {
      int itemsPerRow = 1;
      int w = scrollViewSize.w;
      while (w > 0) {
        w -= self->itemSize.w;
        itemsPerRow++;
        if (w - self->itemSpacing.w < 0) {
          break;
        }
        w -= self->itemSpacing.w;
      }
      const int rows = ceilf(self->items->count / (float) itemsPerRow);
      size.w += max(self->itemSize.w, scrollViewSize.w);
      size.h += rows * (self->itemSize.h + self->itemSpacing.h);
    }
      break;
    case CollectionViewAxisHorizontal:{
      int itemsPerCol = 1;
      int h = scrollViewSize.h;
      while (h > 0) {
        h -= self->itemSize.h;
        itemsPerCol++;
        if (h - self->itemSpacing.h < 0) {
          break;
        }
        h -= self->itemSpacing.h;
      }
      const int cols = ceilf(self->items->count / (float) itemsPerCol);
      size.w += cols * (self->itemSize.w + self->itemSpacing.w);
      size.h += max(self->itemSize.h, scrollViewSize.h);
    }
      break;
  }
 
  return size;
}

reloadData()

static void reloadData ( CollectionView *  self )

static

Definition at line 410 of file CollectionView.c.

                                             {
 
  assert(self->dataSource.numberOfItems);
  assert(self->delegate.itemForObjectAtIndexPath);
 
  $((Array *) self->items, enumerate, reloadData_removeItems, self->contentView);
  $(self->items, removeAllObjects);
 
  const size_t numberOfItems = self->dataSource.numberOfItems(self);
  for (size_t i = 0; i < numberOfItems; i++) {
 
    IndexPath *indexPath = $(alloc(IndexPath), initWithIndex, i);
 
    CollectionItemView *item = self->delegate.itemForObjectAtIndexPath(self, indexPath);
    assert(item);
 
    $(self->items, addObject, item);
    $(self->contentView, addSubview, (View *) item);
 
    release(item);
    release(indexPath);
  }
 
  ((View *) self)->needsLayout = true;
}

reloadData_removeItems()

static void reloadData_removeItems ( const Array *  array, ident  obj, ident  data  )

static

ArrayEnumerator to remove CollectionItemViews from the collection's contentView.

Definition at line 402 of file CollectionView.c.

                                                                              {
  $((View *) data, removeSubview, (View *) obj);
}

selectAll()

static void selectAll ( CollectionView *  self )

static

Definition at line 447 of file CollectionView.c.

                                            {
  $((Array *) self->items, enumerate, selectAll_enumerate, NULL);
}

selectAll_enumerate()

static void selectAll_enumerate ( const Array *  array, ident  obj, ident  data  )

static

ArrayEnumerator for all item selection.

Definition at line 439 of file CollectionView.c.

                                                                           {
  $((CollectionItemView *) obj, setSelected, true);
}

selectionIndexPaths()

static Array * selectionIndexPaths ( const CollectionView *  self )

static

Definition at line 455 of file CollectionView.c.

                                                              {
 
  Array *array = $$(Array, array);
 
  const Array *items = (Array *) self->items;
  for (size_t i = 0; i < items->count; i++) {
 
    const CollectionItemView *item = $(items, objectAtIndex, i);
    if (item->isSelected) {
 
      IndexPath *indexPath = $(self, indexPathForItem, item);
      $(array, addObject, indexPath);
 
      release(indexPath);
    }
  }
 
  return (Array *) array;
}

selectItemAtIndexPath()

static void selectItemAtIndexPath ( CollectionView *  self, const IndexPath *  indexPath  )

static

Definition at line 479 of file CollectionView.c.

                                                                                    {
 
  if (indexPath) {
    CollectionItemView *item = $(self, itemAtIndexPath, indexPath);
    if (item) {
      $(item, setSelected, true);
      $(self->contentView, invalidateStyle);
    }
  }
}

selectItemsAtIndexPaths()

static void selectItemsAtIndexPaths ( CollectionView *  self, const Array *  indexPaths  )

static

Definition at line 501 of file CollectionView.c.

                                                                                   {
 
  if (indexPaths) {
    $(indexPaths, enumerate, selectItemsAtIndexPaths_enumerate, self);
  }
}

selectItemsAtIndexPaths_enumerate()

static void selectItemsAtIndexPaths_enumerate ( const Array *  array, ident  obj, ident  data  )

static

ArrayEnumerator for item selection.

Definition at line 493 of file CollectionView.c.

                                                                                         {
  $((CollectionView *) data, selectItemAtIndexPath, (IndexPath *) obj);
}

Variable Documentation

CollectionViewAxisNames

const EnumName CollectionViewAxisNames[]

Initial value:

= MakeEnumNames(
  MakeEnumAlias(CollectionViewAxisHorizontal, horizontal),
  MakeEnumAlias(CollectionViewAxisVertical, vertical)
)

Definition at line 29 of file CollectionView.c.