Macromedia Flash - Advanced masking with action script

In this exercise, I will show you how to mask dragging with the action script code. How to create is very simple, follow the steps in this lesson sequentially!

Drag the circle below with the mouse!

Step 1

First, select the picture as the background for this exercise.

Step 2

Create a new flash file. Press Ctrl + J ( Document Properties ) and set the width and width (Hight) of the file to the width of the image. Select any background color and set the Frame rate of the file to 32 , then click OK .

Step 3

Select the file, go to Import > Import to stage (Shortcut: Ctrl + R ) and import it into the image you selected.

Step 4

While the image is still selected, go to the Align Panel ( Ctrl + K ) and follow these steps:

1. Make sure that the Align / Distribute to Stage button is selected,
2. Click the Align horizontal center button
3. Click the Align vertical center button

Step 5

While the image is still selected, press F8 key ( Convert to Symbol ) to convert the image into a Movie Clip.

Step 6

When the new Movie Clip is still selected, go to the Properties Panel below. On the left side of the Instance name field, enter the name of the Movie Clip. In this example will be photo .

Step 7

Create a new layer and name it mask . Use the Oval Tool (O) to draw a circle like the image below (hold Shift in the drawing process).

While the circle is still selected, press F8 key ( Convert to Symbol ) to convert this circle into a Movie Clip.

Figure 8

When the new made Movie Clip is still selected, go to the Properties Panel below the stage. In the left part, enter the name Movie Clip in the Instance name field, in this example enter the mask

Step 9

Create a new layer above the layer mask and name it action .

Step 10

Select the first frame of layer action, go to Action Script (F9) and enter the following code:

stop ();
photo.setMask (mask);
mask.onPress = function () {
startDrag (this);
}
mask.onRelease = function () {
stopDrag ();
}

Check the newly created product (Ctrl + Enter)