Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.
Common duplication problems, and corresponding solutions are:
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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22 | class Grid |
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23 | { |
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24 | use Concerns\HasElementNames, |
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25 | Concerns\HasHeader, |
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26 | Concerns\HasFooter, |
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27 | Concerns\HasFilter, |
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28 | Concerns\HasTools, |
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29 | Concerns\HasTotalRow, |
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30 | Concerns\HasHotKeys, |
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31 | Concerns\HasQuickCreate, |
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32 | Concerns\HasActions, |
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33 | Concerns\HasSelector, |
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34 | Concerns\CanHidesColumns, |
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35 | Concerns\CanFixColumns, |
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36 | Macroable { |
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37 | __call as macroCall; |
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38 | } |
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39 | |||
40 | /** |
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41 | * The grid data model instance. |
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42 | * |
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43 | * @var \Encore\Admin\Grid\Model |
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44 | */ |
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45 | protected $model; |
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46 | |||
47 | /** |
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48 | * Collection of all grid columns. |
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49 | * |
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50 | * @var \Illuminate\Support\Collection |
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51 | */ |
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52 | protected $columns; |
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53 | |||
54 | /** |
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55 | * Collection of all data rows. |
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56 | * |
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57 | * @var \Illuminate\Support\Collection |
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58 | */ |
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59 | protected $rows; |
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60 | |||
61 | /** |
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62 | * Rows callable fucntion. |
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63 | * |
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64 | * @var \Closure |
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65 | */ |
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66 | protected $rowsCallback; |
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67 | |||
68 | /** |
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69 | * All column names of the grid. |
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70 | * |
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71 | * @var array |
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72 | */ |
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73 | public $columnNames = []; |
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74 | |||
75 | /** |
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76 | * Grid builder. |
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77 | * |
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78 | * @var \Closure |
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79 | */ |
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80 | protected $builder; |
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81 | |||
82 | /** |
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83 | * Mark if the grid is builded. |
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84 | * |
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85 | * @var bool |
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86 | */ |
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87 | protected $builded = false; |
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88 | |||
89 | /** |
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90 | * All variables in grid view. |
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91 | * |
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92 | * @var array |
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93 | */ |
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94 | protected $variables = []; |
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95 | |||
96 | /** |
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97 | * Resource path of the grid. |
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98 | * |
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99 | * @var |
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100 | */ |
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101 | protected $resourcePath; |
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102 | |||
103 | /** |
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104 | * Default primary key name. |
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105 | * |
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106 | * @var string |
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107 | */ |
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108 | protected $keyName = 'id'; |
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109 | |||
110 | /** |
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111 | * Export driver. |
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112 | * |
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113 | * @var string |
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114 | */ |
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115 | protected $exporter; |
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116 | |||
117 | /** |
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118 | * View for grid to render. |
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119 | * |
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120 | * @var string |
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121 | */ |
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122 | protected $view = 'admin::grid.table'; |
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123 | |||
124 | /** |
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125 | * Per-page options. |
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126 | * |
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127 | * @var array |
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128 | */ |
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129 | public $perPages = [10, 20, 30, 50, 100]; |
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130 | |||
131 | /** |
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132 | * Default items count per-page. |
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133 | * |
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134 | * @var int |
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135 | */ |
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136 | public $perPage = 20; |
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137 | |||
138 | /** |
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139 | * @var []callable |
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140 | */ |
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141 | protected $renderingCallbacks = []; |
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142 | |||
143 | /** |
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144 | * Options for grid. |
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145 | * |
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146 | * @var array |
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147 | */ |
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148 | protected $options = [ |
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149 | 'show_pagination' => true, |
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150 | 'show_tools' => true, |
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151 | 'show_filter' => true, |
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152 | 'show_exporter' => true, |
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153 | 'show_actions' => true, |
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154 | 'show_row_selector' => true, |
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155 | 'show_create_btn' => true, |
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156 | 'show_column_selector' => true, |
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157 | 'show_define_empty_page' => true, |
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158 | ]; |
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159 | |||
160 | /** |
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161 | * @var string |
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162 | */ |
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163 | public $tableID; |
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164 | |||
165 | /** |
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166 | * Initialization closure array. |
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167 | * |
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168 | * @var []Closure |
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169 | */ |
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170 | protected static $initCallbacks = []; |
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171 | |||
172 | /** |
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173 | * Create a new grid instance. |
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174 | * |
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175 | * @param Eloquent $model |
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176 | * @param Closure $builder |
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177 | */ |
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178 | public function __construct(Eloquent $model, Closure $builder = null) |
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179 | { |
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180 | $this->model = new Model($model, $this); |
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181 | $this->keyName = $model->getKeyName(); |
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182 | $this->builder = $builder; |
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183 | |||
184 | $this->initialize(); |
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185 | |||
186 | $this->handleExportRequest(); |
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187 | |||
188 | $this->callInitCallbacks(); |
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189 | } |
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190 | |||
191 | /** |
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192 | * Initialize. |
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193 | */ |
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194 | protected function initialize() |
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195 | { |
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196 | $this->tableID = uniqid('grid-table'); |
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197 | |||
198 | $this->columns = Collection::make(); |
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199 | $this->rows = Collection::make(); |
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200 | |||
201 | $this->initTools() |
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202 | ->initFilter(); |
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203 | } |
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204 | |||
205 | /** |
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206 | * Initialize with user pre-defined default disables and exporter, etc. |
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207 | * |
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208 | * @param Closure $callback |
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209 | */ |
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210 | public static function init(Closure $callback = null) |
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211 | { |
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212 | static::$initCallbacks[] = $callback; |
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213 | } |
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214 | |||
215 | /** |
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216 | * Call the initialization closure array in sequence. |
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217 | */ |
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218 | protected function callInitCallbacks() |
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219 | { |
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220 | if (empty(static::$initCallbacks)) { |
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221 | return; |
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222 | } |
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223 | |||
224 | foreach (static::$initCallbacks as $callback) { |
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225 | call_user_func($callback, $this); |
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226 | } |
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227 | } |
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228 | |||
229 | /** |
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230 | * Handle export request. |
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231 | * |
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232 | * @param bool $forceExport |
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233 | */ |
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234 | protected function handleExportRequest($forceExport = false) |
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235 | { |
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236 | if (!$scope = request(Exporter::$queryName)) { |
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237 | return; |
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238 | } |
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239 | |||
240 | // clear output buffer. |
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241 | if (ob_get_length()) { |
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242 | ob_end_clean(); |
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243 | } |
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244 | |||
245 | $this->model()->usePaginate(false); |
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246 | |||
247 | if ($this->builder) { |
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248 | call_user_func($this->builder, $this); |
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249 | |||
250 | $this->getExporter($scope)->export(); |
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251 | } |
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252 | |||
253 | if ($forceExport) { |
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254 | $this->getExporter($scope)->export(); |
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255 | } |
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256 | } |
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257 | |||
258 | /** |
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259 | * @param string $scope |
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260 | * |
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261 | * @return AbstractExporter |
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262 | */ |
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263 | protected function getExporter($scope) |
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264 | { |
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265 | return (new Exporter($this))->resolve($this->exporter)->withScope($scope); |
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266 | } |
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267 | |||
268 | /** |
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269 | * Get or set option for grid. |
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270 | * |
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271 | * @param string $key |
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272 | * @param mixed $value |
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273 | * |
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274 | * @return $this|mixed |
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275 | */ |
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276 | public function option($key, $value = null) |
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277 | { |
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278 | if (is_null($value)) { |
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279 | return $this->options[$key]; |
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280 | } |
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281 | |||
282 | $this->options[$key] = $value; |
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283 | |||
284 | return $this; |
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285 | } |
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286 | |||
287 | /** |
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288 | * Get primary key name of model. |
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289 | * |
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290 | * @return string |
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291 | */ |
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292 | public function getKeyName() |
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293 | { |
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294 | return $this->keyName ?: 'id'; |
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295 | } |
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296 | |||
297 | /** |
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298 | * Add a column to Grid. |
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299 | * |
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300 | * @param string $name |
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301 | * @param string $label |
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302 | * |
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303 | * @return Column |
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304 | */ |
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305 | public function column($name, $label = '') |
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306 | { |
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307 | if (Str::contains($name, '.')) { |
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308 | return $this->addRelationColumn($name, $label); |
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309 | } |
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310 | |||
311 | if (Str::contains($name, '->')) { |
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312 | return $this->addJsonColumn($name, $label); |
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313 | } |
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314 | |||
315 | return $this->__call($name, array_filter([$label])); |
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316 | } |
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317 | |||
318 | /** |
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319 | * Batch add column to grid. |
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320 | * |
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321 | * @example |
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322 | * 1.$grid->columns(['name' => 'Name', 'email' => 'Email' ...]); |
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323 | * 2.$grid->columns('name', 'email' ...) |
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324 | * |
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325 | * @param array $columns |
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326 | * |
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327 | * @return Collection|null |
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328 | */ |
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329 | public function columns($columns = []) |
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330 | { |
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331 | if (func_num_args() == 0) { |
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332 | return $this->columns; |
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333 | } |
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334 | |||
335 | if (func_num_args() == 1 && is_array($columns)) { |
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336 | foreach ($columns as $column => $label) { |
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337 | $this->column($column, $label); |
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338 | } |
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339 | |||
340 | return; |
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341 | } |
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342 | |||
343 | foreach (func_get_args() as $column) { |
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344 | $this->column($column); |
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345 | } |
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346 | } |
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347 | |||
348 | /** |
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349 | * Add column to grid. |
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350 | * |
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351 | * @param string $column |
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352 | * @param string $label |
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353 | * |
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354 | * @return Column |
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355 | */ |
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356 | View Code Duplication | protected function addColumn($column = '', $label = '') |
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357 | { |
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358 | $column = new Column($column, $label); |
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359 | $column->setGrid($this); |
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360 | |||
361 | return tap($column, function ($value) { |
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362 | $this->columns->push($value); |
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363 | }); |
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364 | } |
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365 | |||
366 | /** |
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367 | * Add a relation column to grid. |
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368 | * |
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369 | * @param string $name |
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370 | * @param string $label |
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371 | * |
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372 | * @return $this|bool|Column |
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373 | */ |
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374 | protected function addRelationColumn($name, $label = '') |
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375 | { |
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376 | list($relation, $column) = explode('.', $name); |
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377 | |||
378 | $model = $this->model()->eloquent(); |
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379 | |||
380 | if (!method_exists($model, $relation) || !$model->{$relation}() instanceof Relations\Relation) { |
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381 | $class = get_class($model); |
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382 | |||
383 | admin_error("Call to undefined relationship [{$relation}] on model [{$class}]."); |
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384 | |||
385 | return $this; |
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386 | } |
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387 | |||
388 | $name = Str::snake($relation).'.'.$column; |
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389 | |||
390 | $this->model()->with($relation); |
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391 | |||
392 | return $this->addColumn($name, $label)->setRelation($relation, $column); |
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393 | } |
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394 | |||
395 | /** |
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396 | * Add a json type column to grid. |
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397 | * |
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398 | * @param string $name |
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399 | * @param string $label |
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400 | * |
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401 | * @return Column |
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402 | */ |
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403 | protected function addJsonColumn($name, $label = '') |
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404 | { |
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405 | $column = substr($name, strrpos($name, '->') + 2); |
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406 | |||
407 | $name = str_replace('->', '.', $name); |
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408 | |||
409 | return $this->addColumn($name, $label ?: ucfirst($column)); |
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410 | } |
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411 | |||
412 | /** |
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413 | * Prepend column to grid. |
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414 | * |
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415 | * @param string $column |
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416 | * @param string $label |
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417 | * |
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418 | * @return Column |
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419 | */ |
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420 | View Code Duplication | protected function prependColumn($column = '', $label = '') |
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421 | { |
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422 | $column = new Column($column, $label); |
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423 | $column->setGrid($this); |
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424 | |||
425 | return tap($column, function ($value) { |
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426 | $this->columns->prepend($value); |
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427 | }); |
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428 | } |
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429 | |||
430 | /** |
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431 | * Get Grid model. |
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432 | * |
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433 | * @return Model |
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434 | */ |
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435 | public function model() |
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436 | { |
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437 | return $this->model; |
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438 | } |
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439 | |||
440 | /** |
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441 | * Paginate the grid. |
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442 | * |
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443 | * @param int $perPage |
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444 | * |
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445 | * @return void |
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446 | */ |
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447 | public function paginate($perPage = 20) |
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448 | { |
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449 | $this->perPage = $perPage; |
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450 | |||
451 | $this->model()->setPerPage($perPage); |
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452 | } |
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453 | |||
454 | /** |
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455 | * Get the grid paginator. |
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456 | * |
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457 | * @return mixed |
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458 | */ |
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459 | public function paginator() |
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460 | { |
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461 | return new Tools\Paginator($this); |
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462 | } |
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463 | |||
464 | /** |
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465 | * Disable grid pagination. |
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466 | * |
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467 | * @return $this |
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468 | */ |
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469 | public function disablePagination(bool $disable = true) |
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470 | { |
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471 | $this->model->usePaginate(!$disable); |
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472 | |||
473 | return $this->option('show_pagination', !$disable); |
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474 | } |
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475 | |||
476 | /** |
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477 | * If this grid use pagination. |
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478 | * |
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479 | * @return bool |
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480 | */ |
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481 | public function showPagination() |
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482 | { |
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483 | return $this->option('show_pagination'); |
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484 | } |
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485 | |||
486 | /** |
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487 | * Set per-page options. |
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488 | * |
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489 | * @param array $perPages |
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490 | */ |
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491 | public function perPages(array $perPages) |
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492 | { |
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493 | $this->perPages = $perPages; |
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494 | } |
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495 | |||
496 | /** |
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497 | * Disable row selector. |
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498 | * |
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499 | * @return Grid|mixed |
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500 | */ |
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501 | public function disableRowSelector(bool $disable = true) |
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502 | { |
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503 | return $this->disableBatchActions($disable); |
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504 | } |
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505 | |||
506 | /** |
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507 | * Prepend checkbox column for grid. |
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508 | * |
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509 | * @return void |
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510 | */ |
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511 | protected function prependRowSelectorColumn() |
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512 | { |
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513 | if (!$this->option('show_row_selector')) { |
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514 | return; |
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515 | } |
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516 | |||
517 | $checkAllBox = "<input type=\"checkbox\" class=\"{$this->getSelectAllName()}\" /> "; |
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518 | |||
519 | $this->prependColumn(Column::SELECT_COLUMN_NAME, ' ') |
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520 | ->displayUsing(Displayers\RowSelector::class) |
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521 | ->addHeader($checkAllBox); |
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522 | } |
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523 | |||
524 | /** |
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525 | * Apply column filter to grid query. |
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526 | * |
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527 | * @return void |
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528 | */ |
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529 | protected function applyColumnFilter() |
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530 | { |
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531 | $this->columns->each->bindFilterQuery($this->model()); |
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532 | } |
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533 | |||
534 | /** |
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535 | * Apply column search to grid query. |
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536 | * |
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537 | * @return void |
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538 | */ |
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539 | protected function applyColumnSearch() |
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540 | { |
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541 | $this->columns->each->bindSearchQuery($this->model()); |
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542 | } |
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543 | |||
544 | /** |
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545 | * @return array|Collection|mixed |
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546 | */ |
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547 | protected function applyQuery() |
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548 | { |
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549 | $this->applyQuickSearch(); |
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550 | |||
551 | $this->applyColumnFilter(); |
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552 | |||
553 | $this->applyColumnSearch(); |
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554 | |||
555 | $this->applySelectorQuery(); |
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556 | |||
557 | return $this->applyFilter(false); |
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558 | } |
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559 | |||
560 | /** |
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561 | * Add row selector columns and action columns before and after the grid. |
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562 | * |
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563 | * @return void |
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564 | */ |
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565 | protected function addDefaultColumns() |
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566 | { |
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567 | $this->prependRowSelectorColumn(); |
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568 | |||
569 | $this->appendActionsColumn(); |
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570 | } |
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571 | |||
572 | /** |
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573 | * Build the grid. |
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574 | * |
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575 | * @return void |
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576 | */ |
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577 | public function build() |
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578 | { |
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579 | if ($this->builded) { |
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580 | return; |
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581 | } |
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582 | |||
583 | $collection = $this->applyQuery(); |
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584 | |||
585 | $this->addDefaultColumns(); |
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586 | |||
587 | Column::setOriginalGridModels($collection); |
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588 | |||
589 | $data = $collection->toArray(); |
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590 | |||
591 | $this->columns->map(function (Column $column) use (&$data) { |
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592 | $data = $column->fill($data); |
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593 | |||
594 | $this->columnNames[] = $column->getName(); |
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595 | }); |
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596 | |||
597 | $this->buildRows($data); |
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598 | |||
599 | $this->builded = true; |
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600 | } |
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601 | |||
602 | /** |
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603 | * Build the grid rows. |
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604 | * |
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605 | * @param array $data |
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606 | * |
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607 | * @return void |
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608 | */ |
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609 | protected function buildRows(array $data) |
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610 | { |
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611 | $this->rows = collect($data)->map(function ($model, $number) { |
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612 | return new Row($number, $model, $this->keyName); |
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613 | }); |
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614 | |||
615 | if ($this->rowsCallback) { |
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616 | $this->rows->map($this->rowsCallback); |
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617 | } |
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618 | } |
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619 | |||
620 | /** |
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621 | * Set grid row callback function. |
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622 | * |
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623 | * @param Closure $callable |
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624 | * |
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625 | * @return Collection|null |
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626 | */ |
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627 | public function rows(Closure $callable = null) |
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628 | { |
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629 | if (is_null($callable)) { |
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630 | return $this->rows; |
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631 | } |
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632 | |||
633 | $this->rowsCallback = $callable; |
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634 | } |
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635 | |||
636 | /** |
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637 | * Set exporter driver for Grid to export. |
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638 | * |
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639 | * @param $exporter |
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640 | * |
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641 | * @return $this |
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642 | */ |
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643 | public function exporter($exporter) |
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649 | |||
650 | /** |
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651 | * Get the export url. |
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652 | * |
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653 | * @param int $scope |
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654 | * @param null $args |
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655 | * |
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656 | * @return string |
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657 | */ |
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658 | public function getExportUrl($scope = 1, $args = null) |
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668 | |||
669 | /** |
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670 | * Get create url. |
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671 | * |
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672 | * @return string |
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673 | */ |
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674 | public function getCreateUrl() |
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687 | |||
688 | /** |
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689 | * If grid show export btn. |
||
690 | * |
||
691 | * @return bool |
||
692 | */ |
||
693 | public function showExportBtn() |
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694 | { |
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695 | return $this->option('show_exporter'); |
||
696 | } |
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697 | |||
698 | /** |
||
699 | * Disable export. |
||
700 | * |
||
701 | * @return $this |
||
702 | */ |
||
703 | public function disableExport(bool $disable = true) |
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704 | { |
||
705 | return $this->option('show_exporter', !$disable); |
||
706 | } |
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707 | |||
708 | /** |
||
709 | * Render export button. |
||
710 | * |
||
711 | * @return string |
||
712 | */ |
||
713 | public function renderExportButton() |
||
717 | |||
718 | /** |
||
719 | * Alias for method `disableCreateButton`. |
||
720 | * |
||
721 | * @return $this |
||
722 | * |
||
723 | * @deprecated |
||
724 | */ |
||
725 | public function disableCreation() |
||
729 | |||
730 | /** |
||
731 | * Remove create button on grid. |
||
732 | * |
||
733 | * @return $this |
||
734 | */ |
||
735 | public function disableCreateButton(bool $disable = true) |
||
736 | { |
||
737 | return $this->option('show_create_btn', !$disable); |
||
738 | } |
||
739 | |||
740 | /** |
||
741 | * Remove define empty page on grid. |
||
742 | * |
||
743 | * @return $this |
||
744 | */ |
||
745 | public function disableDefineEmptyPage(bool $disable = true) |
||
746 | { |
||
747 | return $this->option('show_define_empty_page', !$disable); |
||
748 | } |
||
749 | |||
750 | /** |
||
751 | * If grid show define empty page on grid. |
||
752 | * |
||
753 | * @return bool |
||
754 | */ |
||
755 | public function showDefineEmptyPage() |
||
756 | { |
||
757 | return $this->option('show_define_empty_page'); |
||
758 | } |
||
759 | |||
760 | /** |
||
761 | * If allow creation. |
||
762 | * |
||
763 | * @return bool |
||
764 | */ |
||
765 | public function showCreateBtn() |
||
769 | |||
770 | /** |
||
771 | * Render create button for grid. |
||
772 | * |
||
773 | * @return string |
||
774 | */ |
||
775 | public function renderCreateButton() |
||
779 | |||
780 | /** |
||
781 | * Get current resource url. |
||
782 | * |
||
783 | * @param string $path |
||
784 | * |
||
785 | * @return string |
||
786 | */ |
||
787 | public function resource($path = null) |
||
801 | |||
802 | /** |
||
803 | * Handle get mutator column for grid. |
||
804 | * |
||
805 | * @param string $method |
||
806 | * @param string $label |
||
807 | * |
||
808 | * @return bool|Column |
||
809 | */ |
||
810 | protected function handleGetMutatorColumn($method, $label) |
||
818 | |||
819 | /** |
||
820 | * Handle relation column for grid. |
||
821 | * |
||
822 | * @param string $method |
||
823 | * @param string $label |
||
824 | * |
||
825 | * @return bool|Column |
||
826 | */ |
||
827 | protected function handleRelationColumn($method, $label) |
||
860 | |||
861 | /** |
||
862 | * Dynamically add columns to the grid view. |
||
863 | * |
||
864 | * @param $method |
||
865 | * @param $arguments |
||
866 | * |
||
867 | * @return Column |
||
868 | */ |
||
869 | public function __call($method, $arguments) |
||
891 | |||
892 | /** |
||
893 | * Add variables to grid view. |
||
894 | * |
||
895 | * @param array $variables |
||
896 | * |
||
897 | * @return $this |
||
898 | */ |
||
899 | public function with($variables = []) |
||
905 | |||
906 | /** |
||
907 | * Get all variables will used in grid view. |
||
908 | * |
||
909 | * @return array |
||
910 | */ |
||
911 | protected function variables() |
||
917 | |||
918 | /** |
||
919 | * Set a view to render. |
||
920 | * |
||
921 | * @param string $view |
||
922 | * @param array $variables |
||
923 | */ |
||
924 | public function setView($view, $variables = []) |
||
932 | |||
933 | /** |
||
934 | * Set grid title. |
||
935 | * |
||
936 | * @param string $title |
||
937 | * |
||
938 | * @return $this |
||
939 | */ |
||
940 | public function setTitle($title) |
||
946 | |||
947 | /** |
||
948 | * Set relation for grid. |
||
949 | * |
||
950 | * @param Relations\Relation $relation |
||
951 | * |
||
952 | * @return $this |
||
953 | */ |
||
954 | public function setRelation(Relations\Relation $relation) |
||
960 | |||
961 | /** |
||
962 | * Set resource path for grid. |
||
963 | * |
||
964 | * @param string $path |
||
965 | * |
||
966 | * @return $this |
||
967 | */ |
||
968 | public function setResource($path) |
||
974 | |||
975 | /** |
||
976 | * Set rendering callback. |
||
977 | * |
||
978 | * @param callable $callback |
||
979 | * |
||
980 | * @return $this |
||
981 | */ |
||
982 | public function rendering(callable $callback) |
||
988 | |||
989 | /** |
||
990 | * Call callbacks before render. |
||
991 | * |
||
992 | * @return void |
||
993 | */ |
||
994 | protected function callRenderingCallback() |
||
1000 | |||
1001 | /** |
||
1002 | * Get the string contents of the grid view. |
||
1003 | * |
||
1004 | * @return string |
||
1005 | */ |
||
1006 | public function render() |
||
1020 | } |
||
1021 |