You'll create a new class by extending the built-in MovieClip class.
|
1.
|
Create a new Flash document and name it Shape.fla.
|
|
2.
|
Using the drawing tools, draw a shape on the Stage.
With the entire shape selected, right-click (Windows) or Control-click (Macintosh) the shape and select Convert to Symbol from the context menu.
|
|
3.
|
In the Convert to Symbol dialog box, select Movie Clip as the behavior, and click Advanced.
Select Export for ActionScript.
|
|
4.
|
In the Name text box, enter myShape.
|
|
5.
|
In the AS 2.0 Class text box, enter Drag.
Click OK. This associates the movie clip with the Drag class that you'll create.
|
|
6.
|
Using the Property inspector, assign the movie clip an instance name, then save the FLA file.
Note
A finished sample file of the document you just created, named handson3.fla, is located in your finished files folder. For the path, see "Set up your workspace" on page 256.
|
|
7.
|
Create an ActionScript file by selecting File > New > ActionScript File (Not Flash Document). Save the document with the name Drag.as, in the same location where you saved Shape.fla.
|
|
8.
|
In the ActionScript file that you just created, create a new class and constructor called Drag:
class Drag extends MovieClip
{
function Drag ()
{
onPress=doDrag;
onRelease=doDrop;
}
}
|
|
9.
|
Define private methods in the class that use the existing movie clip methods, startDrag() and stopDrag():
class Drag extends MovieClip
{
function Drag()
{
onPress=doDrag;
onRelease=doDrop;
}
private function doDrag():Void
{
this.startDrag();
}
private function doDrop():Void
{
this.stopDrag()
}
}
|
|
10.
|
Save the ActionScript file.
|
|
11.
|
Test the Shape.fla file.
You should be able to drag the movie clip.
|
