AwayJS Scene

internal

The blendMode property affects each pixel of the display object. Each pixel is composed of three constituent colors(red, green, and blue), and each constituent color has a value between 0x00 and 0xFF. Flash Player or Adobe AIR compares each constituent color of one pixel in the movie clip with the corresponding color of the pixel in the background. For example, if blendMode is set to BlendMode.LIGHTEN, Flash Player or Adobe AIR compares the red value of the display object with the red value of the background, and uses the lighter of the two as the value for the red component of the displayed color.

The following table describes the blendMode settings. The BlendMode class defines string values you can use. The illustrations in the table show blendMode values applied to a circular display object(2) superimposed on another display object(1).

All vector data for a display object that has a cached bitmap is drawn to the bitmap instead of the main display. If cacheAsBitmapMatrix is null or unsupported, the bitmap is then copied to the main display as unstretched, unrotated pixels snapped to the nearest pixel boundaries. Pixels are mapped 1 to 1 with the parent object. If the bounds of the bitmap change, the bitmap is recreated instead of being stretched.

If cacheAsBitmapMatrix is non-null and supported, the object is drawn to the off-screen bitmap using that matrix and the stretched and/or rotated results of that rendering are used to draw the object to the main display.

No internal bitmap is created unless the cacheAsBitmap property is set to true.

After you set the cacheAsBitmap property to true, the rendering does not change, however the display object performs pixel snapping automatically. The animation speed can be significantly faster depending on the complexity of the vector content.

The cacheAsBitmap property is automatically set to true whenever you apply a filter to a display object(when its filter array is not empty), and if a display object has a filter applied to it, cacheAsBitmap is reported as true for that display object, even if you set the property to false. If you clear all filters for a display object, the cacheAsBitmap setting changes to what it was last set to.

A display object does not use a bitmap even if the cacheAsBitmap property is set to true and instead renders from vector data in the following cases:

• The bitmap is too large. In AIR 1.5 and Flash Player 10, the maximum size for a bitmap image is 8,191 pixels in width or height, and the total number of pixels cannot exceed 16,777,215 pixels.(So, if a bitmap image is 8,191 pixels wide, it can only be 2,048 pixels high.) In Flash Player 9 and earlier, the limitation is is 2880 pixels in height and 2,880 pixels in width.
• The bitmap fails to allocate(out of memory error).

The cacheAsBitmap property is best used with movie clips that have mostly static content and that do not scale and rotate frequently. With such movie clips, cacheAsBitmap can lead to performance increases when the movie clip is translated(when its x and y position is changed).

To be able to scale a mask object, it must be on the display list. To be able to drag a mask Sprite object(by calling its startDrag() method), it must be on the display list. To call the startDrag() method for a mask sprite based on a mouseDown event being dispatched by the sprite, set the sprite's buttonMode property to true.

When display objects are cached by setting the cacheAsBitmap property to true an the cacheAsBitmapMatrix property to a Matrix object, both the mask and the display object being masked must be part of the same cached bitmap. Thus, if the display object is cached, then the mask must be a child of the display object. If an ancestor of the display object on the display list is cached, then the mask must be a child of that ancestor or one of its descendents. If more than one ancestor of the masked object is cached, then the mask must be a descendent of the cached container closest to the masked object in the display list.

Note: A single mask object cannot be used to mask more than one calling display object. When the mask is assigned to a second display object, it is removed as the mask of the first object, and that object's mask property becomes null.

When you define the scale9Grid property, the display object is divided into a grid with nine regions based on the scale9Grid rectangle, which defines the center region of the grid. The eight other regions of the grid are the following areas:

• The upper-left corner outside of the rectangle
• The area above the rectangle
• The upper-right corner outside of the rectangle
• The area to the left of the rectangle
• The area to the right of the rectangle
• The lower-left corner outside of the rectangle
• The area below the rectangle
• The lower-right corner outside of the rectangle

You can think of the eight regions outside of the center(defined by the rectangle) as being like a picture frame that has special rules applied to it when scaled.

When the scale9Grid property is set and a display object is scaled, all text and gradients are scaled normally; however, for other types of objects the following rules apply:

• Content in the center region is scaled normally.
• Content in the corners is not scaled.
• Content in the top and bottom regions is scaled horizontally only. Content in the left and right regions is scaled vertically only.
• All fills(including bitmaps, video, and gradients) are stretched to fit their shapes.

If a display object is rotated, all subsequent scaling is normal(and the scale9Grid property is ignored).

For example, consider the following display object and a rectangle that is applied as the display object's scale9Grid:

A common use for setting scale9Grid is to set up a display object to be used as a component, in which edge regions retain the same width when the component is scaled.

throws

ArgumentError If you pass an invalid argument to the method.

The properties of the scrollRect Rectangle object use the display object's coordinate space and are scaled just like the overall display object. The corner bounds of the cropped window on the scrolling display object are the origin of the display object(0,0) and the point defined by the width and height of the rectangle. They are not centered around the origin, but use the origin to define the upper-left corner of the area. A scrolled display object always scrolls in whole pixel increments.

You can scroll an object left and right by setting the x property of the scrollRect Rectangle object. You can scroll an object up and down by setting the y property of the scrollRect Rectangle object. If the display object is rotated 90° and you scroll it left and right, the display object actually scrolls up and down.

Note: When selecting characters to be replaced with setSelection() and replaceSelectedText(), the defaultTextFormat will be applied only if the text has been selected up to and including the last character. Here is an example:

 public my_txt:TextField new TextField();
my_txt.text = "Flash Macintosh version"; public my_fmt:TextFormat = new
TextFormat(); my_fmt.color = 0xFF0000; my_txt.defaultTextFormat = my_fmt;
my_txt.setSelection(6,15); // partial text selected - defaultTextFormat
not applied my_txt.setSelection(6,23); // text selected to end -
defaultTextFormat applied my_txt.replaceSelectedText("Windows version");

When you access the defaultTextFormat property, the returned TextFormat object has all of its properties defined. No property is null.

Note: You can't set this property if a style sheet is applied to the text field.

throws

Error This method cannot be used on a text field with a style sheet.

default

0(0x000000)

default

false

To set values for this property, use the following string values:

If condenseWhite is set to true, use standard HTML commands such as
and

to place line breaks in the text field.

Set the condenseWhite property before setting the htmlText property.

default

false

If you set the embedFonts property to true for a text field, you must specify a font for that text by using the font property of a TextFormat object applied to the text field. If the specified font is not embedded in the SWF file, the text is not displayed.

default

false

The type of grid fitting used determines whether Flash Player forces strong horizontal and vertical lines to fit to a pixel or subpixel grid, or not at all.

For the flash.text.GridFitType property, you can use the following string values:

default

pixel

Flash Player supports the following HTML tags:

Flash Player and AIR also support explicit character codes, such as &(ASCII ampersand) and €(Unicode € symbol).

default

0

default

false

If the string begins with a caret(^) character, all characters are initially accepted and succeeding characters in the string are excluded from the set of accepted characters. If the string does not begin with a caret(^) character, no characters are initially accepted and succeeding characters in the string are included in the set of accepted characters.

The following example allows only uppercase characters, spaces, and numbers to be entered into a text field:

 my_txt.restrict = "A-Z 0-9"; 

The following example includes all characters, but excludes lowercase letters:

 my_txt.restrict = "^a-z"; 

You can use a backslash to enter a ^ or - verbatim. The accepted backslash sequences are -, \^ or \. The backslash must be an actual character in the string, so when specified in ActionScript, a double backslash must be used. For example, the following code includes only the dash(-) and caret(^):

 my_txt.restrict = "\\-\\^"; 

The ^ can be used anywhere in the string to toggle between including characters and excluding characters. The following code includes only uppercase letters, but excludes the uppercase letter Q:

 my_txt.restrict = "A-Z^Q"; 

You can use the \u escape sequence to construct restrict strings. The following code includes only the characters from ASCII 32(space) to ASCII 126(tilde).

 my_txt.restrict = "\u0020-\u007E"; 

default

null

The units of horizontal scrolling are pixels, whereas the units of vertical scrolling are lines. Horizontal scrolling is measured in pixels because most fonts you typically use are proportionally spaced; that is, the characters can have different widths. Flash Player performs vertical scrolling by line because users usually want to see a complete line of text rather than a partial line. Even if a line uses multiple fonts, the height of the line adjusts to fit the largest font in use.

Note: The scrollH property is zero-based, not 1-based like the scrollV vertical scrolling property.

The units of vertical scrolling are lines, whereas the units of horizontal scrolling are pixels. If the first line displayed is the first line in the text field, scrollV is set to 1(not 0). Horizontal scrolling is measured in pixels because most fonts are proportionally spaced; that is, the characters can have different widths. Flash performs vertical scrolling by line because users usually want to see a complete line of text rather than a partial line. Even if there are multiple fonts on a line, the height of the line adjusts to fit the largest font in use.

If selectable is set to false, the text in the text field does not respond to selection commands from the mouse or keyboard, and the text cannot be copied with the Copy command. If selectable is set to true, the text in the text field can be selected with the mouse or keyboard, and the text can be copied with the Copy command. You can select text this way even if the text field is a dynamic text field instead of an input text field.

default

true

default

0

You can change the style sheet associated with a text field at any time. If you change the style sheet in use, the text field is redrawn with the new style sheet. You can set the style sheet to null or undefined to remove the style sheet. If the style sheet in use is removed, the text field is redrawn without a style sheet.

Note: If the style sheet is removed, the contents of both TextField.text and TextField.htmlText change to incorporate the formatting previously applied by the style sheet. To preserve the original TextField.htmlText contents without the formatting, save the value in a variable before removing the style sheet.

The range for thickness is a number from -200 to 200. If you attempt to set thickness to a value outside that range, the property is set to the nearest value in the range(either -200 or 200).

default

0

default

dynamic

throws

ArgumentError The type specified is not a member of flash.text.TextFieldType.