Adobe 38040334 Extending Dreamweaver - Page 93

Manipulating content within a tree control, A color button control for extensions

Page 93 highlights

DREAMWEAVER CS3 87 Extending Dreamweaver Manipulating content within a tree control Tree controls and the nodes within them are implemented as HTML tags. They are parsed by Dreamweaver and stored in the document tree. These tags can be manipulated in the same way as any other document node. For more information on DOM functions and methods, see "The Dreamweaver Document Object Model" on page 90. Adding nodes To add a node to an existing tree control programmatically, set the innerHTML property of the MM:TREECONTROL tag or one of the existing MM:TREENODE tags. Setting the inner HTML property of a tree node creates a nested node. The following example adds a node to the top level of a tree: var tree = document.myTreeControl; //add a top-level node to the bottom of the tree tree.innerHTML = tree.innerHTML + ''; Adding a child node To add a child node to the currently selected node set the innerHTML property of the selected node. The following example adds a child node to the currently selected node: var tree = document.myTreeControl; var selNode = tree.selectedNodes[0]; //deselect the node, so we can select the new one selnode.removeAttribute("selected"); //add the new node to the top of the selected node's children selNode.innerHTML = '' + ¬ selNode.innerHTML; Deleting nodes To delete the currently selected node from the document structure, use the innerHTML or outerHTML properties. The following example deletes the entire selected node and any children: var tree = document.myTreeControl; var selNode = tree.selectedNodes[0]; selNode.outerHTML = ""; A color button control for extensions In addition to the standard input types such as text, check box, and button, Dreamweaver supports mmcolorbutton, an additional input type in extensions. Specifying in your code causes a color picker to appear in the UI. You can set the default color for the color picker by setting a value attribute on the input tag. If you do not set a value, the color picker appears grey by default and the value property of the input object returns an empty string. The following example shows a valid mmcolorbutton tag: A color button has one event, onChange, which is triggered when the color changes. You might want to keep a text box and a color picker synchronized. The following example creates a text box that synchronizes the color of the text box with the color of the color picker:

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
  • 143
  • 144
  • 145
  • 146
  • 147
  • 148
  • 149
  • 150
  • 151
  • 152
  • 153
  • 154
  • 155
  • 156
  • 157
  • 158
  • 159
  • 160
  • 161
  • 162
  • 163
  • 164
  • 165
  • 166
  • 167
  • 168
  • 169
  • 170
  • 171
  • 172
  • 173
  • 174
  • 175
  • 176
  • 177
  • 178
  • 179
  • 180
  • 181
  • 182
  • 183
  • 184
  • 185
  • 186
  • 187
  • 188
  • 189
  • 190
  • 191
  • 192
  • 193
  • 194
  • 195
  • 196
  • 197
  • 198
  • 199
  • 200
  • 201
  • 202
  • 203
  • 204
  • 205
  • 206
  • 207
  • 208
  • 209
  • 210
  • 211
  • 212
  • 213
  • 214
  • 215
  • 216
  • 217
  • 218
  • 219
  • 220
  • 221
  • 222
  • 223
  • 224
  • 225
  • 226
  • 227
  • 228
  • 229
  • 230
  • 231
  • 232
  • 233
  • 234
  • 235
  • 236
  • 237
  • 238
  • 239
  • 240
  • 241
  • 242
  • 243
  • 244
  • 245
  • 246
  • 247
  • 248
  • 249
  • 250
  • 251
  • 252
  • 253
  • 254
  • 255
  • 256
  • 257
  • 258
  • 259
  • 260
  • 261
  • 262
  • 263
  • 264
  • 265
  • 266
  • 267
  • 268
  • 269
  • 270
  • 271
  • 272
  • 273
  • 274
  • 275
  • 276
  • 277
  • 278
  • 279
  • 280
  • 281
  • 282
  • 283
  • 284
  • 285
  • 286
  • 287
  • 288
  • 289
  • 290
  • 291
  • 292
  • 293
  • 294
  • 295
  • 296
  • 297
  • 298
  • 299
  • 300
  • 301
  • 302
  • 303
  • 304
  • 305
  • 306
  • 307
  • 308
  • 309
  • 310
  • 311
  • 312
  • 313
  • 314
  • 315
  • 316
  • 317
  • 318
  • 319
  • 320
  • 321
  • 322
  • 323
  • 324
  • 325
  • 326
  • 327
  • 328
  • 329
  • 330
  • 331
  • 332
  • 333
  • 334
  • 335
  • 336
  • 337
  • 338
  • 339
  • 340
  • 341
  • 342
  • 343
  • 344
  • 345
  • 346
  • 347
  • 348
  • 349
  • 350
  • 351
  • 352
  • 353
  • 354
  • 355
  • 356
  • 357
  • 358
  • 359
  • 360
  • 361
  • 362
  • 363
  • 364
  • 365
  • 366
  • 367
  • 368
  • 369
  • 370
  • 371
  • 372
  • 373
  • 374
  • 375
  • 376
  • 377
  • 378
  • 379
  • 380
  • 381
  • 382
  • 383
  • 384
  • 385

DREAMWEAVER CS3
Extending Dreamweaver
87
Manipulating content within a tree control
Tree controls and the nodes within them are implemented as HTML tags. They are parsed by Dreamweaver and
stored in the document tree. These tags can be manipulated in the same way as any other document node. For more
information on
DOM
functions and methods, see “The Dreamweaver Document Object Model” on page 90.
Adding nodes
To add a node to an existing tree control programmatically, set the
innerHTML
property of the
MM:TREECONTROL
tag or one of the existing
MM:TREENODE
tags. Setting the
inner HTML
property of a tree node
creates a nested node.
The following example adds a node to the top level of a tree:
var tree = document.myTreeControl;
//add a top-level node to the bottom of the tree
tree.innerHTML = tree.innerHTML + ‘<mm:treenode name="node3" value="node3">’;
Adding a child node
To add a child node to the currently selected node set the
innerHTML
property of the selected
node.
The following example adds a child node to the currently selected node:
var tree = document.myTreeControl;
var selNode = tree.selectedNodes[0];
//deselect the node, so we can select the new one
selnode.removeAttribute("selected");
//add the new node to the top of the selected node’s children
selNode.innerHTML = '<mm:treenode name="item10" value="New item11" expanded selected>' + ¬
selNode.innerHTML;
Deleting nodes
To delete the currently selected node from the document structure, use the
innerHTML
or
outerHTML
properties.
The following example deletes the entire selected node and any children:
var tree = document.myTreeControl;
var selNode = tree.selectedNodes[0];
selNode.outerHTML = "";
A color button control for extensions
In addition to the standard input types such as text, check box, and button, Dreamweaver supports
mmcolorbutton
,
an additional input type in extensions.
Specifying
<input type=
"
mmcolorbutton
"
>
in your code causes a color picker to appear in the UI. You can set the
default color for the color picker by setting a value attribute on the input tag. If you do not set a value, the color picker
appears grey by default and the value property of the input object returns an empty string.
The following example shows a valid
mmcolorbutton
tag:
<input type="mmcolorbutton" name="colorbutton" value="#FF0000">
<input type="mmcolorbutton" name="colorbutton" value="teal">
A color button has one event,
onChange
, which is triggered when the color changes.
You might want to keep a text box and a color picker synchronized. The following example creates a text box that
synchronizes the color of the text box with the color of the color picker:
<input type = "mmcolorbutton" name="fgcolorPicker"
onChange="document.fgcolorText.value=this.value">
<input type = "test" name="fgcolorText" onBlur="document.fgColorPicker.value=this.value">