Let’s take a look at an example:
<mx:DataGrid id= "songList" dataProvider= "{songDB}" width= "100%" height= "100%" editable= "true"
itemEditEnd="itemEditEndHandler(event)" itemEditBeginning= "itemEditBeginningHandler(event)"
>
The itemEditBeginningHandler can be controlled like this:
private function itemEditBeginningHandler(event:DataGridEvent): void
{
if (== 0 || == 3 ){
();
}
}
The itemEdit event will not work when the first and fourth items of datagrid are clicked.
The following is the description ()
If the default behavior of an event can be canceled, the behavior is canceled.
Many events have associated behaviors that are executed by default. For example, if the user typed a character in a text field, the default behavior is to display the character in the text field. Since the default behavior of the TextEvent.TEXT_INPUT event can be cancelled, you can use the preventDefault() method to prevent the character from being displayed.
An example of an uncancelable behavior is the default behavior associated with an event, which is generated whenever Flash Player deletes the display object from the display list. The preventDefault() method is invalid for this default behavior because the default behavior cannot be cancelled (delete elements).
You can use the property to check whether the default behavior associated with a specific event can be prevented. If the value of , you can use preventDefault() to cancel the event; otherwise, preventDefault() is invalid.
Copy the codeThe code is as follows:
<mx:DataGrid id= "songList" dataProvider= "{songDB}" width= "100%" height= "100%" editable= "true"
itemEditEnd="itemEditEndHandler(event)" itemEditBeginning= "itemEditBeginningHandler(event)"
>
The itemEditBeginningHandler can be controlled like this:
Copy the codeThe code is as follows:
private function itemEditBeginningHandler(event:DataGridEvent): void
{
if (== 0 || == 3 ){
();
}
}
The itemEdit event will not work when the first and fourth items of datagrid are clicked.
The following is the description ()
If the default behavior of an event can be canceled, the behavior is canceled.
Many events have associated behaviors that are executed by default. For example, if the user typed a character in a text field, the default behavior is to display the character in the text field. Since the default behavior of the TextEvent.TEXT_INPUT event can be cancelled, you can use the preventDefault() method to prevent the character from being displayed.
An example of an uncancelable behavior is the default behavior associated with an event, which is generated whenever Flash Player deletes the display object from the display list. The preventDefault() method is invalid for this default behavior because the default behavior cannot be cancelled (delete elements).
You can use the property to check whether the default behavior associated with a specific event can be prevented. If the value of , you can use preventDefault() to cancel the event; otherwise, preventDefault() is invalid.