Complex classes like Grid often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use Grid, and based on these observations, apply Extract Interface, too.
| 1 | <?php  | 
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| 50 | 1 | class Grid extends Components\Container  | 
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| 51 | 1 | { | 
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| 52 | /***** DEFAULTS ****/  | 
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| 53 | const BUTTONS = 'buttons';  | 
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| 54 | |||
| 55 | const CLIENT_SIDE_OPTIONS = 'grido-options';  | 
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| 56 | |||
| 57 | /** @var int @persistent */  | 
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| 58 | public $page = 1;  | 
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| 59 | |||
| 60 | /** @var int @persistent */  | 
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| 61 | public $perPage;  | 
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| 62 | |||
| 63 | /** @var array @persistent */  | 
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| 64 | public $sort = [];  | 
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| 65 | |||
| 66 | 1 | /** @var array @persistent */  | 
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| 67 | public $filter = [];  | 
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| 68 | |||
| 69 | /** @var array event on all grid's components registered */  | 
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| 70 | public $onRegistered;  | 
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| 71 | |||
| 72 | /** @var array event on render */  | 
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| 73 | public $onRender;  | 
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| 74 | |||
| 75 | /** @var array event for modifying data */  | 
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| 76 | public $onFetchData;  | 
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| 77 | |||
| 78 | /** @var callback returns tr html element; function($row, Html $tr) */  | 
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| 79 | protected $rowCallback;  | 
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| 80 | |||
| 81 | /** @var \Nette\Utils\Html */  | 
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| 82 | protected $tablePrototype;  | 
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| 83 | |||
| 84 | /** @var bool */  | 
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| 85 | protected $rememberState = FALSE;  | 
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| 86 | |||
| 87 | /** @var string */  | 
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| 88 | protected $rememberStateSectionName;  | 
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| 89 | |||
| 90 | /** @var string */  | 
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| 91 | protected $primaryKey = 'id';  | 
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| 92 | |||
| 93 | /** @var string */  | 
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| 94 | protected $filterRenderType;  | 
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| 95 | |||
| 96 | /** @var array */  | 
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| 97 | protected $perPageList = [10, 20, 30, 50, 100];  | 
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| 98 | |||
| 99 | /** @var int */  | 
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| 100 | protected $defaultPerPage = 20;  | 
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| 101 | |||
| 102 | /** @var array */  | 
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| 103 | protected $defaultFilter = [];  | 
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| 104 | |||
| 105 | /** @var array */  | 
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| 106 | protected $defaultSort = [];  | 
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| 107 | |||
| 108 | /** @var DataSources\IDataSource */  | 
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| 109 | protected $model;  | 
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| 110 | |||
| 111 | /** @var int total count of items */  | 
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| 112 | protected $count;  | 
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| 113 | |||
| 114 | /** @var mixed */  | 
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| 115 | protected $data;  | 
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| 116 | |||
| 117 | /** @var Paginator */  | 
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| 118 | protected $paginator;  | 
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| 119 | 1 | ||
| 120 | /** @var \Nette\Localization\ITranslator */  | 
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| 121 | protected $translator;  | 
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| 122 | |||
| 123 | /** @var PropertyAccessor */  | 
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| 124 | protected $propertyAccessor;  | 
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| 125 | |||
| 126 | /** @var bool */  | 
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| 127 | protected $strictMode = TRUE;  | 
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| 128 | |||
| 129 | /** @var array */  | 
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| 130 | protected $options = [  | 
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| 131 | self::CLIENT_SIDE_OPTIONS => []  | 
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| 132 | ];  | 
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| 133 | |||
| 134 | /** @var Customization */  | 
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| 135 | 1 | protected $customization;  | 
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| 136 | |||
| 137 | /**  | 
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| 138 | * Sets a model that implements the interface Grido\DataSources\IDataSource or data-source object.  | 
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| 139 | * @param mixed $model  | 
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| 140 | * @param bool $forceWrapper  | 
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| 141 | * @throws Exception  | 
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| 142 | * @return Grid  | 
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| 143 | */  | 
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| 144 | public function setModel($model, $forceWrapper = FALSE)  | 
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| 145 |     { | 
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| 146 | 1 | $this->model = $model instanceof DataSources\IDataSource && $forceWrapper === FALSE  | 
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| 147 | 1 | ? $model  | 
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| 148 | 1 | : new DataSources\Model($model);  | 
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| 149 | |||
| 150 | 1 | return $this;  | 
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| 151 | }  | 
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| 152 | |||
| 153 | 1 | /**  | 
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| 154 | * Sets the default number of items per page.  | 
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| 155 | * @param int $perPage  | 
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| 156 | * @return Grid  | 
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| 157 | */  | 
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| 158 | public function setDefaultPerPage($perPage)  | 
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| 159 |     { | 
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| 160 | 1 | $perPage = (int) $perPage;  | 
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| 161 | 1 | $this->defaultPerPage = $perPage;  | 
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| 162 | |||
| 163 | 1 |         if (!in_array($perPage, $this->perPageList)) { | 
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| 164 | 1 | $this->perPageList[] = $perPage;  | 
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| 165 | 1 | sort($this->perPageList);  | 
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| 166 | 1 | }  | 
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| 167 | |||
| 168 | 1 | return $this;  | 
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| 169 | }  | 
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| 170 | |||
| 171 | /**  | 
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| 172 | * Sets default filtering.  | 
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| 173 | * @param array $filter  | 
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| 174 | * @return Grid  | 
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| 175 | */  | 
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| 176 | public function setDefaultFilter(array $filter)  | 
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| 177 |     { | 
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| 178 | 1 | $this->defaultFilter = array_merge($this->defaultFilter, $filter);  | 
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| 179 | 1 | return $this;  | 
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| 180 | }  | 
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| 181 | |||
| 182 | /**  | 
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| 183 | * Sets default sorting.  | 
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| 184 | * @param array $sort  | 
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| 185 | * @return Grid  | 
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| 186 | * @throws Exception  | 
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| 187 | 1 | */  | 
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| 188 | public function setDefaultSort(array $sort)  | 
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| 189 |     { | 
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| 190 | 1 | static $replace = ['asc' => Column::ORDER_ASC, 'desc' => Column::ORDER_DESC];  | 
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| 191 | |||
| 192 | 1 |         foreach ($sort as $column => $dir) { | 
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| 193 | 1 | $dir = strtr(strtolower($dir), $replace);  | 
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| 194 | 1 |             if (!in_array($dir, $replace)) { | 
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| 195 | 1 |                 throw new Exception("Dir '$dir' for column '$column' is not allowed."); | 
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| 196 | }  | 
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| 197 | |||
| 198 | 1 | $this->defaultSort[$column] = $dir;  | 
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| 199 | 1 | }  | 
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| 200 | |||
| 201 | 1 | return $this;  | 
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| 202 | }  | 
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| 203 | |||
| 204 | /**  | 
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| 205 | * Sets items to per-page select.  | 
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| 206 | * @param array $perPageList  | 
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| 207 | 1 | * @return Grid  | 
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| 208 | 1 | */  | 
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| 209 | public function setPerPageList(array $perPageList)  | 
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| 210 |     { | 
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| 211 | 1 | $this->perPageList = $perPageList;  | 
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| 212 | |||
| 213 | 1 |         if ($this->hasFilters(FALSE) || $this->hasOperation(FALSE)) { | 
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| 214 | 1 | $this['form']['count']->setItems($this->getItemsForCountSelect());  | 
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| 215 | 1 | }  | 
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| 216 | |||
| 217 | 1 | return $this;  | 
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| 218 | }  | 
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| 219 | |||
| 220 | /**  | 
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| 221 | * Sets translator.  | 
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| 222 | * @param \Nette\Localization\ITranslator $translator  | 
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| 223 | * @return Grid  | 
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| 224 | */  | 
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| 225 | public function setTranslator(\Nette\Localization\ITranslator $translator)  | 
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| 226 |     { | 
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| 227 | 1 | $this->translator = $translator;  | 
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| 228 | 1 | return $this;  | 
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| 229 | }  | 
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| 230 | |||
| 231 | /**  | 
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| 232 | * Sets type of filter rendering.  | 
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| 233 | * Defaults inner (Filter::RENDER_INNER) if column does not exist then outer filter (Filter::RENDER_OUTER).  | 
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| 234 | * @param string $type  | 
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| 235 | 1 | * @throws Exception  | 
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| 236 | * @return Grid  | 
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| 237 | */  | 
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| 238 | public function setFilterRenderType($type)  | 
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| 239 |     { | 
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| 240 | 1 | $type = strtolower($type);  | 
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| 241 | 1 |         if (!in_array($type, [Filter::RENDER_INNER, Filter::RENDER_OUTER])) { | 
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| 242 | 1 |             throw new Exception('Type must be Filter::RENDER_INNER or Filter::RENDER_OUTER.'); | 
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| 243 | }  | 
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| 244 | |||
| 245 | 1 | $this->filterRenderType = $type;  | 
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| 246 | 1 | return $this;  | 
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| 247 | }  | 
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| 248 | |||
| 249 | /**  | 
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| 250 | * Sets custom paginator.  | 
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| 251 | * @param Paginator $paginator  | 
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| 252 | * @return Grid  | 
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| 253 | */  | 
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| 254 | public function setPaginator(Paginator $paginator)  | 
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| 255 |     { | 
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| 256 | 1 | $this->paginator = $paginator;  | 
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| 257 | 1 | return $this;  | 
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| 258 | }  | 
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| 259 | |||
| 260 | /**  | 
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| 261 | * Sets grid primary key.  | 
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| 262 | * Defaults is "id".  | 
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| 263 | * @param string $key  | 
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| 264 | * @return Grid  | 
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| 265 | */  | 
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| 266 | public function setPrimaryKey($key)  | 
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| 267 |     { | 
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| 268 | 1 | $this->primaryKey = $key;  | 
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| 269 | 1 | return $this;  | 
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| 270 | }  | 
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| 271 | |||
| 272 | /**  | 
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| 273 | * Sets file name of custom template.  | 
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| 274 | * @param string $file  | 
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| 275 | * @return Grid  | 
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| 276 | */  | 
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| 277 | public function setTemplateFile($file)  | 
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| 278 |     { | 
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| 279 | 1 |         $this->onRender[] = function() use ($file) { | 
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| 280 | 1 | $this->template->gridoTemplate = $this->getTemplate()->getFile();  | 
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| 
                                                                                                    
                        
                         | 
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| 281 | 1 | $this->getTemplate()->setFile($file);  | 
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| 282 | 1 | };  | 
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| 283 | 1 | ||
| 284 | 1 | return $this;  | 
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| 285 | }  | 
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| 286 | |||
| 287 | /**  | 
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| 288 | * Sets saving state to session.  | 
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| 289 | * @param bool $state  | 
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| 290 | * @param string $sectionName  | 
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| 291 | * @return Grid  | 
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| 292 | */  | 
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| 293 | public function setRememberState($state = TRUE, $sectionName = NULL)  | 
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| 294 |     { | 
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| 295 | 1 | $this->getPresenter(); //component must be attached to presenter  | 
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| 296 | 1 | $this->getRememberSession(TRUE); //start session if not  | 
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| 297 | 1 | $this->rememberState = (bool) $state;  | 
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| 298 | 1 | $this->rememberStateSectionName = $sectionName;  | 
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| 299 | |||
| 300 | 1 | return $this;  | 
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| 301 | }  | 
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| 302 | |||
| 303 | /**  | 
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| 304 | * Sets callback for customizing tr html object.  | 
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| 305 | * Callback returns tr html element; function($row, Html $tr).  | 
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| 306 | * @param $callback  | 
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| 307 | * @return Grid  | 
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| 308 | */  | 
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| 309 | public function setRowCallback($callback)  | 
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| 310 |     { | 
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| 311 | 1 | $this->rowCallback = $callback;  | 
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| 312 | 1 | return $this;  | 
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| 313 | }  | 
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| 314 | |||
| 315 | /**  | 
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| 316 | * Sets client-side options.  | 
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| 317 | * @param array $options  | 
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| 318 | * @return Grid  | 
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| 319 | */  | 
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| 320 | public function setClientSideOptions(array $options)  | 
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| 321 |     { | 
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| 322 | 1 | $this->options[self::CLIENT_SIDE_OPTIONS] = $options;  | 
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| 323 | 1 | return $this;  | 
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| 324 | }  | 
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| 325 | |||
| 326 | /**  | 
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| 327 | * Determines whether any user error will cause a notice.  | 
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| 328 | * @param bool $mode  | 
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| 329 | * @return \Grido\Grid  | 
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| 330 | */  | 
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| 331 | public function setStrictMode($mode)  | 
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| 332 |     { | 
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| 333 | 1 | $this->strictMode = (bool) $mode;  | 
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| 334 | 1 | return $this;  | 
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| 335 | }  | 
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| 336 | |||
| 337 | /**  | 
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| 338 | * @param \Grido\Customization $customization  | 
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| 339 | */  | 
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| 340 | public function setCustomization(Customization $customization)  | 
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| 344 | |||
| 345 | /**********************************************************************************************/  | 
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| 346 | |||
| 347 | /**  | 
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| 348 | * Returns total count of data.  | 
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| 349 | * @return int  | 
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| 350 | */  | 
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| 351 | public function getCount()  | 
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| 352 |     { | 
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| 353 | 1 |         if ($this->count === NULL) { | 
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| 354 | 1 | $this->count = $this->getModel()->getCount();  | 
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| 355 | 1 | }  | 
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| 356 | |||
| 357 | 1 | return $this->count;  | 
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| 358 | }  | 
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| 359 | |||
| 360 | /**  | 
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| 361 | * Returns default per page.  | 
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| 362 | * @return int  | 
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| 363 | */  | 
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| 364 | public function getDefaultPerPage()  | 
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| 365 |     { | 
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| 366 | 1 |         if (!in_array($this->defaultPerPage, $this->perPageList)) { | 
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| 367 | 1 | $this->defaultPerPage = $this->perPageList[0];  | 
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| 368 | 1 | }  | 
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| 369 | |||
| 370 | 1 | return $this->defaultPerPage;  | 
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| 371 | }  | 
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| 372 | |||
| 373 | /**  | 
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| 374 | * Returns default filter.  | 
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| 375 | * @return array  | 
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| 376 | */  | 
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| 377 | public function getDefaultFilter()  | 
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| 381 | |||
| 382 | /**  | 
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| 383 | * Returns default sort.  | 
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| 384 | * @return array  | 
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| 385 | */  | 
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| 386 | public function getDefaultSort()  | 
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| 390 | |||
| 391 | /**  | 
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| 392 | * Returns list of possible items per page.  | 
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| 393 | * @return array  | 
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| 394 | */  | 
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| 395 | public function getPerPageList()  | 
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| 399 | |||
| 400 | /**  | 
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| 401 | * Returns primary key.  | 
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| 402 | * @return string  | 
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| 403 | */  | 
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| 404 | public function getPrimaryKey()  | 
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| 408 | |||
| 409 | /**  | 
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| 410 | * Returns remember state.  | 
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| 411 | * @return bool  | 
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| 412 | */  | 
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| 413 | public function getRememberState()  | 
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| 417 | |||
| 418 | /**  | 
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| 419 | * Returns row callback.  | 
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| 420 | * @return callback  | 
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| 421 | */  | 
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| 422 | public function getRowCallback()  | 
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| 426 | |||
| 427 | /**  | 
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| 428 | * Returns items per page.  | 
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| 429 | * @return int  | 
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| 430 | */  | 
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| 431 | public function getPerPage()  | 
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| 432 |     { | 
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| 433 | 1 | return $this->perPage === NULL  | 
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| 434 | 1 | ? $this->getDefaultPerPage()  | 
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| 435 | 1 | : $this->perPage;  | 
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| 436 | }  | 
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| 437 | |||
| 438 | /**  | 
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| 439 | * Returns actual filter values.  | 
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| 440 | * @param string $key  | 
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| 441 | * @return mixed  | 
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| 442 | */  | 
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| 443 | public function getActualFilter($key = NULL)  | 
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| 448 | |||
| 449 | /**  | 
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| 450 | * Returns fetched data.  | 
            ||
| 451 | * @param bool $applyPaging  | 
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| 452 | * @param bool $useCache  | 
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| 453 | * @param bool $fetch  | 
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| 454 | * @throws Exception  | 
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| 455 | * @return array|DataSources\IDataSource|\Nette\Database\Table\Selection  | 
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| 456 | */  | 
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| 457 | public function getData($applyPaging = TRUE, $useCache = TRUE, $fetch = TRUE)  | 
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| 458 |     { | 
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| 459 | 1 |         if ($this->getModel() === NULL) { | 
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| 460 | 1 |             throw new Exception('Model cannot be empty, please use method $grid->setModel().'); | 
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| 461 | }  | 
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| 462 | |||
| 463 | 1 | $data = $this->data;  | 
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| 464 | 1 |         if ($data === NULL || $useCache === FALSE) { | 
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| 465 | 1 | $this->applyFiltering();  | 
            |
| 466 | 1 | $this->applySorting();  | 
            |
| 467 | |||
| 468 | 1 |             if ($applyPaging) { | 
            |
| 469 | 1 | $this->applyPaging();  | 
            |
| 470 | 1 | }  | 
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| 471 | |||
| 472 | 1 |             if ($fetch === FALSE) { | 
            |
| 473 | 1 | return $this->getModel();  | 
            |
| 474 | }  | 
            ||
| 475 | |||
| 476 | 1 | $data = $this->getModel()->getData();  | 
            |
| 477 | |||
| 478 | 1 |             if ($useCache === TRUE) { | 
            |
| 479 | 1 | $this->data = $data;  | 
            |
| 480 | 1 | }  | 
            |
| 481 | |||
| 482 | 1 |             if ($applyPaging && !empty($data) && !in_array($this->page, range(1, $this->getPaginator()->pageCount))) { | 
            |
| 483 | 1 |                 $this->__triggerUserNotice("Page is out of range."); | 
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| 484 | 1 | $this->page = 1;  | 
            |
| 485 | 1 | }  | 
            |
| 486 | |||
| 487 | 1 |             if (!empty($this->onFetchData)) { | 
            |
| 488 | $this->onFetchData($this);  | 
            ||
| 489 | }  | 
            ||
| 490 | 1 | }  | 
            |
| 491 | |||
| 492 | 1 | return $data;  | 
            |
| 493 | }  | 
            ||
| 494 | |||
| 495 | /**  | 
            ||
| 496 | * Returns translator.  | 
            ||
| 497 | * @return Translations\FileTranslator  | 
            ||
| 498 | */  | 
            ||
| 499 | public function getTranslator()  | 
            ||
| 500 |     { | 
            ||
| 501 | 1 |         if ($this->translator === NULL) { | 
            |
| 502 | 1 | $this->setTranslator(new Translations\FileTranslator);  | 
            |
| 503 | 1 | }  | 
            |
| 504 | |||
| 505 | 1 | return $this->translator;  | 
            |
| 506 | }  | 
            ||
| 507 | |||
| 508 | /**  | 
            ||
| 509 | * Returns remember session for set expiration, etc.  | 
            ||
| 510 | * @param bool $forceStart - if TRUE, session will be started if not  | 
            ||
| 511 | * @return \Nette\Http\SessionSection|NULL  | 
            ||
| 512 | */  | 
            ||
| 513 | public function getRememberSession($forceStart = FALSE)  | 
            ||
| 514 |     { | 
            ||
| 515 | 1 | $presenter = $this->getPresenter();  | 
            |
| 516 | 1 | $session = $presenter->getSession();  | 
            |
| 517 | |||
| 518 | 1 |         if (!$session->isStarted() && $forceStart) { | 
            |
| 519 | 1 | $session->start();  | 
            |
| 520 | 1 | }  | 
            |
| 521 | |||
| 522 | 1 | return $session->isStarted()  | 
            |
| 523 | 1 | ? ($session->getSection($this->rememberStateSectionName ?: ($presenter->name . ':' . $this->getUniqueId())))  | 
            |
| 524 | 1 | : NULL;  | 
            |
| 525 | }  | 
            ||
| 526 | |||
| 527 | /**  | 
            ||
| 528 | * Returns table html element of grid.  | 
            ||
| 529 | * @return \Nette\Utils\Html  | 
            ||
| 530 | */  | 
            ||
| 531 | public function getTablePrototype()  | 
            ||
| 532 |     { | 
            ||
| 533 | 1 |         if ($this->tablePrototype === NULL) { | 
            |
| 534 | 1 |             $this->tablePrototype = \Nette\Utils\Html::el('table'); | 
            |
| 535 | 1 | $this->tablePrototype->id($this->getName());  | 
            |
| 536 | 1 | }  | 
            |
| 537 | |||
| 538 | 1 | return $this->tablePrototype;  | 
            |
| 539 | }  | 
            ||
| 540 | |||
| 541 | /**  | 
            ||
| 542 | * @return string  | 
            ||
| 543 | * @internal  | 
            ||
| 544 | */  | 
            ||
| 545 | public function getFilterRenderType()  | 
            ||
| 546 |     { | 
            ||
| 547 | 1 |         if ($this->filterRenderType !== NULL) { | 
            |
| 548 | 1 | return $this->filterRenderType;  | 
            |
| 549 | }  | 
            ||
| 550 | |||
| 551 | 1 | $this->filterRenderType = Filter::RENDER_OUTER;  | 
            |
| 552 | 1 |         if ($this->hasColumns() && $this->hasFilters() && $this->hasActions()) { | 
            |
| 553 | 1 | $this->filterRenderType = Filter::RENDER_INNER;  | 
            |
| 554 | |||
| 555 | 1 | $filters = $this[Filter::ID]->getComponents();  | 
            |
| 556 | 1 |             foreach ($filters as $filter) { | 
            |
| 557 | 1 |                 if (!$this[Column::ID]->getComponent($filter->name, FALSE)) { | 
            |
| 558 | 1 | $this->filterRenderType = Filter::RENDER_OUTER;  | 
            |
| 559 | 1 | break;  | 
            |
| 560 | }  | 
            ||
| 561 | 1 | }  | 
            |
| 562 | 1 | }  | 
            |
| 563 | |||
| 564 | 1 | return $this->filterRenderType;  | 
            |
| 565 | }  | 
            ||
| 566 | |||
| 567 | /**  | 
            ||
| 568 | * @return DataSources\IDataSource  | 
            ||
| 569 | */  | 
            ||
| 570 | public function getModel()  | 
            ||
| 574 | |||
| 575 | /**  | 
            ||
| 576 | * @return Paginator  | 
            ||
| 577 | * @internal  | 
            ||
| 578 | */  | 
            ||
| 579 | public function getPaginator()  | 
            ||
| 580 |     { | 
            ||
| 581 | 1 |         if ($this->paginator === NULL) { | 
            |
| 582 | 1 | $this->paginator = new Paginator;  | 
            |
| 583 | 1 | $this->paginator->setItemsPerPage($this->getPerPage())  | 
            |
| 584 | 1 | ->setGrid($this);  | 
            |
| 585 | 1 | }  | 
            |
| 586 | |||
| 587 | 1 | return $this->paginator;  | 
            |
| 588 | }  | 
            ||
| 589 | |||
| 590 | /**  | 
            ||
| 591 | * A simple wrapper around symfony/property-access with Nette Database dot notation support.  | 
            ||
| 592 | * @param array|object $object  | 
            ||
| 593 | * @param string $name  | 
            ||
| 594 | * @return mixed  | 
            ||
| 595 | * @internal  | 
            ||
| 596 | */  | 
            ||
| 597 | public function getProperty($object, $name)  | 
            ||
| 620 | |||
| 621 | /**  | 
            ||
| 622 | * @return PropertyAccessor  | 
            ||
| 623 | * @internal  | 
            ||
| 624 | */  | 
            ||
| 625 | public function getPropertyAccessor()  | 
            ||
| 633 | |||
| 634 | /**  | 
            ||
| 635 | * @param mixed $row item from db  | 
            ||
| 636 | * @return \Nette\Utils\Html  | 
            ||
| 637 | * @internal  | 
            ||
| 638 | */  | 
            ||
| 639 | public function getRowPrototype($row)  | 
            ||
| 656 | |||
| 657 | /**  | 
            ||
| 658 | * Returns client-side options.  | 
            ||
| 659 | * @return array  | 
            ||
| 660 | */  | 
            ||
| 661 | public function getClientSideOptions()  | 
            ||
| 665 | |||
| 666 | /**  | 
            ||
| 667 | * @return bool  | 
            ||
| 668 | */  | 
            ||
| 669 | public function isStrictMode()  | 
            ||
| 673 | |||
| 674 | /**  | 
            ||
| 675 | * @return Customization  | 
            ||
| 676 | */  | 
            ||
| 677 | public function getCustomization()  | 
            ||
| 685 | |||
| 686 | /**********************************************************************************************/  | 
            ||
| 687 | |||
| 688 | /**  | 
            ||
| 689 | * Loads state informations.  | 
            ||
| 690 | * @param array $params  | 
            ||
| 691 | * @internal  | 
            ||
| 692 | */  | 
            ||
| 693 | public function loadState(array $params)  | 
            ||
| 705 | |||
| 706 | /**  | 
            ||
| 707 | * Saves state informations for next request.  | 
            ||
| 708 | * @param array $params  | 
            ||
| 709 | * @param \Nette\Application\UI\PresenterComponentReflection $reflection (internal, used by Presenter)  | 
            ||
| 710 | * @internal  | 
            ||
| 711 | */  | 
            ||
| 712 | public function saveState(array &$params, $reflection = NULL)  | 
            ||
| 717 | |||
| 718 | /**  | 
            ||
| 719 | * Ajax method.  | 
            ||
| 720 | * @internal  | 
            ||
| 721 | */  | 
            ||
| 722 | public function handleRefresh()  | 
            ||
| 726 | |||
| 727 | /**  | 
            ||
| 728 | * @param int $page  | 
            ||
| 729 | * @internal  | 
            ||
| 730 | */  | 
            ||
| 731 | public function handlePage($page)  | 
            ||
| 735 | |||
| 736 | /**  | 
            ||
| 737 | * @param array $sort  | 
            ||
| 738 | * @internal  | 
            ||
| 739 | */  | 
            ||
| 740 | public function handleSort(array $sort)  | 
            ||
| 745 | |||
| 746 | /**  | 
            ||
| 747 | * @param \Nette\Forms\Controls\SubmitButton $button  | 
            ||
| 748 | * @internal  | 
            ||
| 749 | */  | 
            ||
| 750 | public function handleFilter(\Nette\Forms\Controls\SubmitButton $button)  | 
            ||
| 770 | |||
| 771 | /**  | 
            ||
| 772 | * @param \Nette\Forms\Controls\SubmitButton $button  | 
            ||
| 773 | * @internal  | 
            ||
| 774 | */  | 
            ||
| 775 | public function handleReset(\Nette\Forms\Controls\SubmitButton $button)  | 
            ||
| 790 | |||
| 791 | /**  | 
            ||
| 792 | * @param \Nette\Forms\Controls\SubmitButton $button  | 
            ||
| 793 | * @internal  | 
            ||
| 794 | */  | 
            ||
| 795 | public function handlePerPage(\Nette\Forms\Controls\SubmitButton $button)  | 
            ||
| 805 | |||
| 806 | /**  | 
            ||
| 807 | * Refresh wrapper.  | 
            ||
| 808 | * @return void  | 
            ||
| 809 | * @internal  | 
            ||
| 810 | */  | 
            ||
| 811 | public function reload()  | 
            ||
| 820 | |||
| 821 | /**********************************************************************************************/  | 
            ||
| 822 | |||
| 823 | /**  | 
            ||
| 824 | * @return \Nette\Templating\FileTemplate  | 
            ||
| 825 | * @internal  | 
            ||
| 826 | */  | 
            ||
| 827 | public function createTemplate()  | 
            ||
| 835 | |||
| 836 | /**  | 
            ||
| 837 | * @internal  | 
            ||
| 838 | * @throws Exception  | 
            ||
| 839 | */  | 
            ||
| 840 | public function render()  | 
            ||
| 870 | |||
| 871 | protected function saveRememberState()  | 
            ||
| 881 | |||
| 882 | protected function applyFiltering()  | 
            ||
| 887 | |||
| 888 | /**  | 
            ||
| 889 | * @param array $filter  | 
            ||
| 890 | * @return array  | 
            ||
| 891 | * @internal  | 
            ||
| 892 | */  | 
            ||
| 893 | public function __getConditions(array $filter)  | 
            ||
| 920 | |||
| 921 | protected function applySorting()  | 
            ||
| 960 | |||
| 961 | protected function applyPaging()  | 
            ||
| 974 | |||
| 975 | protected function createComponentForm($name)  | 
            ||
| 993 | |||
| 994 | /**  | 
            ||
| 995 | * @return array  | 
            ||
| 996 | */  | 
            ||
| 997 | protected function getItemsForCountSelect()  | 
            ||
| 1001 | |||
| 1002 | /**  | 
            ||
| 1003 | * @internal  | 
            ||
| 1004 | * @param string $message  | 
            ||
| 1005 | */  | 
            ||
| 1006 | public function __triggerUserNotice($message)  | 
            ||
| 1014 | }  | 
            ||
| 1015 | 
If you access a property on an interface, you most likely code against a concrete implementation of the interface.
Available Fixes
Adding an additional type check:
Changing the type hint: