1 | /* |
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2 | * Ext JS Library 2.2.1 |
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3 | * Copyright(c) 2006-2009, Ext JS, LLC. |
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4 | * licensing@extjs.com |
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5 | * |
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6 | * http://extjs.com/license |
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7 | */ |
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8 | |
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9 | /** |
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10 | * @class Ext.dd.DragSource |
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11 | * @extends Ext.dd.DDProxy |
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12 | * A simple class that provides the basic implementation needed to make any element draggable. |
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13 | * @constructor |
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14 | * @param {Mixed} el The container element |
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15 | * @param {Object} config |
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16 | */ |
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17 | Ext.dd.DragSource = function(el, config){ |
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18 | this.el = Ext.get(el); |
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19 | if(!this.dragData){ |
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20 | this.dragData = {}; |
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21 | } |
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22 | |
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23 | Ext.apply(this, config); |
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24 | |
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25 | if(!this.proxy){ |
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26 | this.proxy = new Ext.dd.StatusProxy(); |
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27 | } |
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28 | Ext.dd.DragSource.superclass.constructor.call(this, this.el.dom, this.ddGroup || this.group, |
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29 | {dragElId : this.proxy.id, resizeFrame: false, isTarget: false, scroll: this.scroll === true}); |
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30 | |
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31 | this.dragging = false; |
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32 | }; |
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33 | |
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34 | Ext.extend(Ext.dd.DragSource, Ext.dd.DDProxy, { |
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35 | /** |
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36 | * @cfg {String} ddGroup |
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37 | * A named drag drop group to which this object belongs. If a group is specified, then this object will only |
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38 | * interact with other drag drop objects in the same group (defaults to undefined). |
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39 | */ |
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40 | /** |
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41 | * @cfg {String} dropAllowed |
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42 | * The CSS class returned to the drag source when drop is allowed (defaults to "x-dd-drop-ok"). |
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43 | */ |
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44 | dropAllowed : "x-dd-drop-ok", |
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45 | /** |
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46 | * @cfg {String} dropNotAllowed |
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47 | * The CSS class returned to the drag source when drop is not allowed (defaults to "x-dd-drop-nodrop"). |
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48 | */ |
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49 | dropNotAllowed : "x-dd-drop-nodrop", |
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50 | |
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51 | /** |
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52 | * Returns the data object associated with this drag source |
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53 | * @return {Object} data An object containing arbitrary data |
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54 | */ |
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55 | getDragData : function(e){ |
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56 | return this.dragData; |
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57 | }, |
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58 | |
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59 | // private |
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60 | onDragEnter : function(e, id){ |
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61 | var target = Ext.dd.DragDropMgr.getDDById(id); |
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62 | this.cachedTarget = target; |
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63 | if(this.beforeDragEnter(target, e, id) !== false){ |
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64 | if(target.isNotifyTarget){ |
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65 | var status = target.notifyEnter(this, e, this.dragData); |
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66 | this.proxy.setStatus(status); |
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67 | }else{ |
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68 | this.proxy.setStatus(this.dropAllowed); |
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69 | } |
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70 | |
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71 | if(this.afterDragEnter){ |
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72 | /** |
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73 | * An empty function by default, but provided so that you can perform a custom action |
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74 | * when the dragged item enters the drop target by providing an implementation. |
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75 | * @param {Ext.dd.DragDrop} target The drop target |
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76 | * @param {Event} e The event object |
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77 | * @param {String} id The id of the dragged element |
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78 | * @method afterDragEnter |
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79 | */ |
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80 | this.afterDragEnter(target, e, id); |
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81 | } |
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82 | } |
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83 | }, |
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84 | |
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85 | /** |
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86 | * An empty function by default, but provided so that you can perform a custom action |
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87 | * before the dragged item enters the drop target and optionally cancel the onDragEnter. |
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88 | * @param {Ext.dd.DragDrop} target The drop target |
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89 | * @param {Event} e The event object |
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90 | * @param {String} id The id of the dragged element |
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91 | * @return {Boolean} isValid True if the drag event is valid, else false to cancel |
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92 | */ |
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93 | beforeDragEnter : function(target, e, id){ |
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94 | return true; |
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95 | }, |
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96 | |
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97 | // private |
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98 | alignElWithMouse: function() { |
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99 | Ext.dd.DragSource.superclass.alignElWithMouse.apply(this, arguments); |
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100 | this.proxy.sync(); |
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101 | }, |
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102 | |
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103 | // private |
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104 | onDragOver : function(e, id){ |
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105 | var target = this.cachedTarget || Ext.dd.DragDropMgr.getDDById(id); |
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106 | if(this.beforeDragOver(target, e, id) !== false){ |
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107 | if(target.isNotifyTarget){ |
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108 | var status = target.notifyOver(this, e, this.dragData); |
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109 | this.proxy.setStatus(status); |
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110 | } |
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111 | |
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112 | if(this.afterDragOver){ |
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113 | /** |
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114 | * An empty function by default, but provided so that you can perform a custom action |
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115 | * while the dragged item is over the drop target by providing an implementation. |
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116 | * @param {Ext.dd.DragDrop} target The drop target |
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117 | * @param {Event} e The event object |
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118 | * @param {String} id The id of the dragged element |
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119 | * @method afterDragOver |
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120 | */ |
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121 | this.afterDragOver(target, e, id); |
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122 | } |
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123 | } |
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124 | }, |
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125 | |
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126 | /** |
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127 | * An empty function by default, but provided so that you can perform a custom action |
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128 | * while the dragged item is over the drop target and optionally cancel the onDragOver. |
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129 | * @param {Ext.dd.DragDrop} target The drop target |
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130 | * @param {Event} e The event object |
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131 | * @param {String} id The id of the dragged element |
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132 | * @return {Boolean} isValid True if the drag event is valid, else false to cancel |
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133 | */ |
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134 | beforeDragOver : function(target, e, id){ |
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135 | return true; |
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136 | }, |
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137 | |
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138 | // private |
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139 | onDragOut : function(e, id){ |
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140 | var target = this.cachedTarget || Ext.dd.DragDropMgr.getDDById(id); |
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141 | if(this.beforeDragOut(target, e, id) !== false){ |
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142 | if(target.isNotifyTarget){ |
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143 | target.notifyOut(this, e, this.dragData); |
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144 | } |
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145 | this.proxy.reset(); |
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146 | if(this.afterDragOut){ |
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147 | /** |
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148 | * An empty function by default, but provided so that you can perform a custom action |
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149 | * after the dragged item is dragged out of the target without dropping. |
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150 | * @param {Ext.dd.DragDrop} target The drop target |
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151 | * @param {Event} e The event object |
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152 | * @param {String} id The id of the dragged element |
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153 | * @method afterDragOut |
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154 | */ |
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155 | this.afterDragOut(target, e, id); |
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156 | } |
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157 | } |
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158 | this.cachedTarget = null; |
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159 | }, |
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160 | |
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161 | /** |
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162 | * An empty function by default, but provided so that you can perform a custom action before the dragged |
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163 | * item is dragged out of the target without dropping, and optionally cancel the onDragOut. |
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164 | * @param {Ext.dd.DragDrop} target The drop target |
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165 | * @param {Event} e The event object |
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166 | * @param {String} id The id of the dragged element |
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167 | * @return {Boolean} isValid True if the drag event is valid, else false to cancel |
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168 | */ |
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169 | beforeDragOut : function(target, e, id){ |
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170 | return true; |
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171 | }, |
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172 | |
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173 | // private |
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174 | onDragDrop : function(e, id){ |
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175 | var target = this.cachedTarget || Ext.dd.DragDropMgr.getDDById(id); |
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176 | if(this.beforeDragDrop(target, e, id) !== false){ |
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177 | if(target.isNotifyTarget){ |
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178 | if(target.notifyDrop(this, e, this.dragData)){ // valid drop? |
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179 | this.onValidDrop(target, e, id); |
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180 | }else{ |
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181 | this.onInvalidDrop(target, e, id); |
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182 | } |
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183 | }else{ |
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184 | this.onValidDrop(target, e, id); |
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185 | } |
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186 | |
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187 | if(this.afterDragDrop){ |
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188 | /** |
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189 | * An empty function by default, but provided so that you can perform a custom action |
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190 | * after a valid drag drop has occurred by providing an implementation. |
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191 | * @param {Ext.dd.DragDrop} target The drop target |
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192 | * @param {Event} e The event object |
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193 | * @param {String} id The id of the dropped element |
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194 | * @method afterDragDrop |
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195 | */ |
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196 | this.afterDragDrop(target, e, id); |
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197 | } |
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198 | } |
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199 | delete this.cachedTarget; |
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200 | }, |
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201 | |
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202 | /** |
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203 | * An empty function by default, but provided so that you can perform a custom action before the dragged |
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204 | * item is dropped onto the target and optionally cancel the onDragDrop. |
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205 | * @param {Ext.dd.DragDrop} target The drop target |
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206 | * @param {Event} e The event object |
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207 | * @param {String} id The id of the dragged element |
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208 | * @return {Boolean} isValid True if the drag drop event is valid, else false to cancel |
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209 | */ |
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210 | beforeDragDrop : function(target, e, id){ |
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211 | return true; |
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212 | }, |
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213 | |
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214 | // private |
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215 | onValidDrop : function(target, e, id){ |
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216 | this.hideProxy(); |
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217 | if(this.afterValidDrop){ |
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218 | /** |
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219 | * An empty function by default, but provided so that you can perform a custom action |
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220 | * after a valid drop has occurred by providing an implementation. |
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221 | * @param {Object} target The target DD |
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222 | * @param {Event} e The event object |
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223 | * @param {String} id The id of the dropped element |
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224 | * @method afterInvalidDrop |
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225 | */ |
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226 | this.afterValidDrop(target, e, id); |
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227 | } |
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228 | }, |
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229 | |
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230 | // private |
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231 | getRepairXY : function(e, data){ |
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232 | return this.el.getXY(); |
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233 | }, |
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234 | |
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235 | // private |
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236 | onInvalidDrop : function(target, e, id){ |
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237 | this.beforeInvalidDrop(target, e, id); |
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238 | if(this.cachedTarget){ |
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239 | if(this.cachedTarget.isNotifyTarget){ |
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240 | this.cachedTarget.notifyOut(this, e, this.dragData); |
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241 | } |
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242 | this.cacheTarget = null; |
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243 | } |
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244 | this.proxy.repair(this.getRepairXY(e, this.dragData), this.afterRepair, this); |
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245 | |
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246 | if(this.afterInvalidDrop){ |
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247 | /** |
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248 | * An empty function by default, but provided so that you can perform a custom action |
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249 | * after an invalid drop has occurred by providing an implementation. |
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250 | * @param {Event} e The event object |
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251 | * @param {String} id The id of the dropped element |
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252 | * @method afterInvalidDrop |
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253 | */ |
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254 | this.afterInvalidDrop(e, id); |
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255 | } |
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256 | }, |
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257 | |
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258 | // private |
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259 | afterRepair : function(){ |
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260 | if(Ext.enableFx){ |
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261 | this.el.highlight(this.hlColor || "c3daf9"); |
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262 | } |
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263 | this.dragging = false; |
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264 | }, |
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265 | |
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266 | /** |
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267 | * An empty function by default, but provided so that you can perform a custom action after an invalid |
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268 | * drop has occurred. |
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269 | * @param {Ext.dd.DragDrop} target The drop target |
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270 | * @param {Event} e The event object |
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271 | * @param {String} id The id of the dragged element |
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272 | * @return {Boolean} isValid True if the invalid drop should proceed, else false to cancel |
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273 | */ |
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274 | beforeInvalidDrop : function(target, e, id){ |
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275 | return true; |
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276 | }, |
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277 | |
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278 | // private |
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279 | handleMouseDown : function(e){ |
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280 | if(this.dragging) { |
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281 | return; |
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282 | } |
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283 | var data = this.getDragData(e); |
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284 | if(data && this.onBeforeDrag(data, e) !== false){ |
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285 | this.dragData = data; |
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286 | this.proxy.stop(); |
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287 | Ext.dd.DragSource.superclass.handleMouseDown.apply(this, arguments); |
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288 | } |
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289 | }, |
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290 | |
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291 | /** |
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292 | * An empty function by default, but provided so that you can perform a custom action before the initial |
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293 | * drag event begins and optionally cancel it. |
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294 | * @param {Object} data An object containing arbitrary data to be shared with drop targets |
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295 | * @param {Event} e The event object |
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296 | * @return {Boolean} isValid True if the drag event is valid, else false to cancel |
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297 | */ |
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298 | onBeforeDrag : function(data, e){ |
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299 | return true; |
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300 | }, |
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301 | |
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302 | /** |
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303 | * An empty function by default, but provided so that you can perform a custom action once the initial |
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304 | * drag event has begun. The drag cannot be canceled from this function. |
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305 | * @param {Number} x The x position of the click on the dragged object |
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306 | * @param {Number} y The y position of the click on the dragged object |
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307 | */ |
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308 | onStartDrag : Ext.emptyFn, |
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309 | |
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310 | // private override |
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311 | startDrag : function(x, y){ |
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312 | this.proxy.reset(); |
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313 | this.dragging = true; |
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314 | this.proxy.update(""); |
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315 | this.onInitDrag(x, y); |
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316 | this.proxy.show(); |
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317 | }, |
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318 | |
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319 | // private |
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320 | onInitDrag : function(x, y){ |
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321 | var clone = this.el.dom.cloneNode(true); |
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322 | clone.id = Ext.id(); // prevent duplicate ids |
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323 | this.proxy.update(clone); |
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324 | this.onStartDrag(x, y); |
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325 | return true; |
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326 | }, |
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327 | |
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328 | /** |
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329 | * Returns the drag source's underlying {@link Ext.dd.StatusProxy} |
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330 | * @return {Ext.dd.StatusProxy} proxy The StatusProxy |
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331 | */ |
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332 | getProxy : function(){ |
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333 | return this.proxy; |
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334 | }, |
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335 | |
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336 | /** |
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337 | * Hides the drag source's {@link Ext.dd.StatusProxy} |
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338 | */ |
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339 | hideProxy : function(){ |
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340 | this.proxy.hide(); |
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341 | this.proxy.reset(true); |
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342 | this.dragging = false; |
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343 | }, |
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344 | |
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345 | // private |
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346 | triggerCacheRefresh : function(){ |
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347 | Ext.dd.DDM.refreshCache(this.groups); |
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348 | }, |
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349 | |
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350 | // private - override to prevent hiding |
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351 | b4EndDrag: function(e) { |
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352 | }, |
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353 | |
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354 | // private - override to prevent moving |
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355 | endDrag : function(e){ |
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356 | this.onEndDrag(this.dragData, e); |
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357 | }, |
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358 | |
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359 | // private |
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360 | onEndDrag : function(data, e){ |
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361 | }, |
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362 | |
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363 | // private - pin to cursor |
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364 | autoOffset : function(x, y) { |
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365 | this.setDelta(-12, -20); |
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366 | } |
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367 | }); |
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