Posts Tagged ‘interactive’
I’ve had that exact task numerous time while scripting actionscript. I have a source image loaded externally or a mc within the program and I need to fit it into a certain area (width x height) but keep the aspect ratio the same or as photoshop calls it “constrain proportions”. I’ve done this with fancy and not so fancy formulas and equations, but finally I had it and created a simple function that would do it every time. Figured it was worth sharing cause if I’ve googled it before then others most likely will too!
This is more than just setting the width and height of an object, because that way the image is easily skewed and the natural proportions are messed up. If you want to just use scale you need to know the dimensions of the image being resized, and that’s just not scalable (no pun intended).
What we have to do is to do both. Assign the width and height to skew it, and then scale it to correct the proportion. So if we want to resize an image when we don’t know it’s current size to fit into a 300 pixel square we set the width and height of that image to 300 and then a bit of logic that can be summed up in one line:
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| mc.scaleX < mc.scaleY ? mc.scaleY = mc.scaleX : mc.scaleX = mc.scaleY; |
That says if the x scale is larger than the y scale set the x to the y scale amount, and vice versa. It’s basically setting both scales to the smaller of the two. This works because we don’t know the original size of the image, but actionscript does. scaleX and scaleY are ratios of the current width and height to the originals. A little complicated I know, but that’s why I’ve made the function below. I know how to use it and now I don’t have to think about skewing and then scaling back to keep my aspect ratio or proportion. You should see how to use it just by looking at it:
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| resizeMe(mc:MovieClip, maxW:Number, maxH:Number=0, constrainProportions:Boolean=true) |
Pass in the movieClip you want to resize, and the size you want it to fit into. So with the same example above, just do
Example
Here’s an interactive example to show what I mean. It loads an external image and you click and drag the mouse around to resize it. To toggle whether you want to constrain proportions use the space bar. Type a url to any image you want to test it with and press load, or hit ‘enter’.
Here’s a screenshot of me playing with a photo in here NOT constraining proportions.
Source (AS3)
The resizing function
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| //The resizing function
// parameters
// required: mc = the movieClip to resize
// required: maxW = either the size of the box to resize to, or just the maximum desired width
// optional: maxH = if desired resize area is not a square, the maximum desired height. default is to match to maxW (so if you want to resize to 200x200, just send 200 once)
// optional: constrainProportions = boolean to determine if you want to constrain proportions or skew image. default true.
function resizeMe(mc:MovieClip, maxW:Number, maxH:Number=0, constrainProportions:Boolean=true):void{
maxH = maxH == 0 ? maxW : maxH;
mc.width = maxW;
mc.height = maxH;
if (constrainProportions) {
mc.scaleX < mc.scaleY ? mc.scaleY = mc.scaleX : mc.scaleX = mc.scaleY;
}
} |
The full source
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| var defaultUrl:String = "http://blog.circlecube.com/wp-content/uploads/2008/11/circlecubelogo4.png";
var image:MovieClip = new MovieClip();
loadImage();
function loadImage(url:String=""):void {
if (url == "" || url == defaultToLoadString) url = defaultUrl;
//clear image
image.visible = false;
image = new MovieClip();
//add image
var ldr:Loader = new Loader();
var urlReq:URLRequest = new URLRequest(url);
trace("loading image: " + url);
ldr.load(urlReq);
ldr.contentLoaderInfo.addEventListener(Event.COMPLETE, imageCompleteHandler);
image.addChild(ldr);
addChild(image);
}
function imageCompleteHandler(e:Event):void {
resizeMe(image, stage.stageWidth)
}
//The resizing function
// parameters
// required: mc = the movieClip to resize
// required: maxW = either the size of the box to resize to, or just the maximum desired width
// optional: maxH = if desired resize area is not a square, the maximum desired height. default is to match to maxW (so if you want to resize to 200x200, just send 200 once)
// optional: constrainProportions = boolean to determine if you want to constrain proportions or skew image. default true.
function resizeMe(mc:MovieClip, maxW:Number, maxH:Number=0, constrainProportions:Boolean=true):void{
maxH = maxH == 0 ? maxW : maxH;
mc.width = maxW;
mc.height = maxH;
if (constrainProportions) {
mc.scaleX < mc.scaleY ? mc.scaleY = mc.scaleX : mc.scaleX = mc.scaleY;
}
}
var constrainOn:Boolean = true;
var isPressed:Boolean = false;
stage.addEventListener(MouseEvent.MOUSE_MOVE, moved);
stage.addEventListener(MouseEvent.MOUSE_DOWN, pressed);
stage.addEventListener(MouseEvent.MOUSE_UP, released);
stage.addEventListener(KeyboardEvent.KEY_DOWN,keyDownListener);
function keyDownListener(e:KeyboardEvent) {
if (e.keyCode == 32){//spacebar
toggled(e);
}
if(e.keyCode == 13){//enter
loadImagePress(e);
}
}
function moved(e:Event):void{
if (isPressed)
resizeMe(image, mouseX, mouseY, constrainOn);
}
function pressed(e:MouseEvent):void{
isPressed = true;
moved(e);
}
function released(e:MouseEvent):void{
isPressed = false;
}
function toggled(e:Event):void{
constrainOn = !constrainOn;
moved(e);
}
var defaultToLoadString:String = "type url of image to load";
toLoad.text = defaultToLoadString;
toLoad.addEventListener(FocusEvent.FOCUS_IN, toLoadFocus);
toLoad.addEventListener(FocusEvent.FOCUS_OUT, toLoadBlur);
function toLoadFocus(e:FocusEvent):void{
if (toLoad.text == defaultToLoadString)
toLoad.text = "";
}
function toLoadBlur(e:FocusEvent):void{
if (toLoad.text == "")
toLoad.text = defaultToLoadString;
}
loadBtn.addEventListener(MouseEvent.CLICK, loadImagePress);
function loadImagePress(e:Event):void{
loadImage(toLoad.text);
} |
Download
constrainProportions.fla
And as usual, let me know if you’ve got any comments questions or suggestions! Thanks,
Author: Evan Mullins | Filed under: tutorial
Tags: actionscript, as3, experiment, flash, interactive, open source, tutorial, web design
Overview
Earlier I wrote a tutorial article about asfunction in as2. Now that I’ m into as3, surprise surprise asfunction has been depreciated and now to replace it is the LINK TextEvent. Dispatched when a user clicks a hyperlink in an HTML-enabled text field, where the URL begins with “event:”. The remainder of the URL after “event:” will be placed in the text property of the LINK event.
This differs from the asfunction method in that we must add an event listener (addEventListener) to the textField object, the event listener specifies which function will be called in the event of a link click and there is no way to send arguments along with the event (AFAIK). But it’s easy enought to use one link event function for all your link events and put in a simple switch statement to coordinate the desired results…
Steps
- Use event in the href attribute. (href=”event:eventText”)
- Listen to the textField (theTextField.addEventListener(TextEvent.LINK, linkHandler);)
- Handle the link event (function linkHandler(linkEvent:TextEvent):void {…)
Example
Actionscript
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| var myHTMLText:String = "Sample text in an html enabled text box.\n"+
"Here's a normal link to <a href='http://bloc.circlecube.com'>circlecube</a> putting the link into the href attribute like normal!\n"+
"<a href='event:clickLink'>Click this circlecube</a>, to see the text event link in action! \n"+
"And some more links that don't go anywhere, but they do call functions in actionscript. "+
"Click this to move <a href='event:moveUp'>UP</a>, click me move back "+
"<a href='event:moveDown'>DOWN</a>.\n"+
"Also, one last example <a href='event:testing'>click for a trace test</a>";
//create and initialize css
var myCSS:StyleSheet = new StyleSheet();
myCSS.setStyle("a:link", {color:'#0000CC',textDecoration:'none'});
myCSS.setStyle("a:hover", {color:'#0000FF',textDecoration:'underline'});
myHTML.styleSheet = myCSS;
myHTML.htmlText = myHTMLText;
myHTML.addEventListener(TextEvent.LINK, linkHandler);
function linkHandler(linkEvent:TextEvent):void {
switch (linkEvent.text) {
case "clickLink":
clickLink();
break;
case "moveUp":
moveUp();
break;
case "moveDown":
moveDown();
break;
default:
giveFeedback(linkEvent.text);
}
}
//function to be called from html text
function clickLink():void {
giveFeedback("Hyperlink clicked!");
var myURL:String = "http://blog.circlecube.com";
var myRequest:URLRequest = new URLRequest(myURL);
try {
navigateToURL(myRequest);
}
catch (e:Error) {
// handle error here
giveFeedback(e);
}
}
//another function to be called from html text, recieves one argument
function moveUp():void {
feedback.y -= 10;
giveFeedback("Up");
}
//a simple trick to allow passing of multiple arguments
function moveDown():void {
feedback.y += 10;
giveFeedback("Down");
}
function giveFeedback(str):void {
trace(str);
feedback.appendText(str +"\n");
feedback.scrollV = feedback.maxScrollV;
} |
Source
Download the fla here: textlinkevent_as3.fla
Author: Evan Mullins | Filed under: tutorial
Tags: actionscript, as3, css, download, flash, flex, html, interactive, open source, tutorial, web design
StomperNet has been a ‘buzz’.
After Andy’s ‘Mea Culpa‘ why wouldn’t it be…
But this is so much better and bigger, learning many lessons from the last launch – StomperNet strikes again!
Teamed up with Paul Lemberg a new product called FormulaFIVE (F5 for short).
Just launched a video to excite the industry!
So check out stomperf5.com now!
Author: Evan Mullins | Filed under: portfolio, work
Tags: actionscript, as2, css, dreamweaver, film, flash, graphic design, html, interactive, movie, portfolio, review, seo, stompernet, video, web design, website, work
Overview
Integrating the clipboard of the operating system with your flash projects is sometimes essential. It’s a very simple and boils down to one basic method… System.setClipboard(). I’ve found a couple other things help the user experience though, such as selecting the text that gets copied and giving the user some sort of feedback to let them know that the text was successfully copied. Here’s a simple way to do it. Have any suggestions to make it better?
I’ve included an as2 version as well as as3. I’ve promised myself to migrate to as3, so I’m not coding anything in 2 that I don’t do in 3 also. This was to discourage me from coding in as2 and to encourage me to code as3, but also let me learn by doing it in both to see the actual differences if I was stuck doing a project in as2. I figured this could help others see the differences between the two versions of actionscript a bit easier and make their own migration as well!
Steps
- copy to OS clipboard = System.setClipboard(“Text to COPY”) of System.setClipboard(textBoxToCopy.text)
- set selection to text that is copied
- give user feedback
Examples and Source
AS2
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| textBox.textBox.text = "Click this text box to copy the text or click the COPY button below. You will see feedback to the user and this text copied to your clipboard!\n\n"+
'copyButton.onRelease = textBox.onPress = function(){\n\tSelection.setFocus("textBox");\n\tSelection.setSelection(0, textBox.text.length);\n\tSystem.setClipboard(textBox.text);\n\ttrace("copied: "+textBox.text);\n\tfeedback("Text Copied!");\n}';
copyButton.onRelease = textBox.onPress = function(){
Selection.setFocus("textBox.textBox");
Selection.setSelection(0, textBox.textBox.text.length);
System.setClipboard(textBox.textBox.text);
trace("copied: "+textBox.textBox.text);
textFeedback("Text Copied!");
}
function textFeedback(theFeedback:String){
feedback.text = theFeedback;
setTimeout(function(){feedback.text="";}, 1200);
} |
AS3
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| textBox.text = "Click this text box to copy the text or click the COPY button below. You will see feedback to the user and this text copied to your clipboard!\n\n"+
'function copyText(e:MouseEvent):void{\n\ttextBox.setSelection(0, textBox.text.length)\n\tSystem.setClipboard(textBox.text);\n\ttrace("copied: "+textBox.text);\n\ttextFeedback("Text Copied!");\n}';
//set it so the textBox selection will show even when textBox has no focus
textBox.alwaysShowSelection = true;
textBox.addEventListener(MouseEvent.CLICK, copyText);
copyButton.addEventListener(MouseEvent.CLICK, copyText);
function copyText(e:MouseEvent):void{
textBox.setSelection(0, textBox.text.length)
System.setClipboard(textBox.text);
trace("copied: "+textBox.text);
textFeedback("Text Copied!");
}
function textFeedback(theFeedback:String):void {
feedback.text = theFeedback;
setTimeout(function(){feedback.text="";}, 1200);
} |
Download
Source files: clipboard_as3.fla clipboard_as2+as3.zip
Author: Evan Mullins | Filed under: tutorial
Tags: actionscript, AIR, as2, as3, download, experiment, flash, flex, interactive, open source, tutorial
Overview
Color can sometimes make or break your design. I’ve put together this flash to show how to set a movieclip to a certain color, I’ve had to do this at runtime and had to go by different values such as a hex number, rgb values and have even wanted to just set a random color, so this example does them all! It’s even nice for translating a Hexadecimal color into RGB color.
Flash uses a Transform object to control certain properties of movie clips. To set color we need to use a Transform object as well as a ColorTransform object. ColorTransform objets are used to, you guessed it, tell the Transform object what color we want to set our clip to. It was a little unintuitive for me to learn, but now it makes sense, or at least enough sense to use.
I’ve made a function that does all this for you. You just send it the movieClip reference and a color.
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| setColor(myMovieClip, myColor) |
There are functions to convert rgb values to a hex value, and from a hex value to red, blue and green values as well.
To make a random hexadecimal number Math.random() * 16777216 (the total number of hexadecimal numbers)
Steps
- Imports
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| import flash.geom.ColorTransform;
import flash.geom.Transform; |
- Make a Transform object
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| var myTransform:Transform = new Transform(item); |
- Make a ColorTransform object
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| var myColorTransform:ColorTransform = new ColorTransform(); |
- Set the rgb color of the ColorTransfrorm object
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| myColorTransform.rgb = myColor; |
- Set the colorTransform property of the Transform object to your ColorTransform object
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| myTransform.colorTransform = myColorTransform; |
Flash Color App
Source Actionscript (as2)
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| //method to set a specified movieClip(item:movidClip) to a specified color(col:hex value number)
function setColor(item, col) {
//make transform object and send the specified movieClip to it
var myTransform:Transform = new Transform(item);
//make colorTransform
var myColorTransform:ColorTransform = new ColorTransform();
//check color bounds
if (col > 16777215) col = 16777215;
else if (col < 0) col = 0;
//variable to hold the color value
var myColor:Number = col;
//set color through color transformation
myColorTransform.rgb = myColor;
myTransform.colorTransform = myColorTransform;
trace("the hex number: 0x" + addZeros(myColorTransform.rgb.toString(16)));
var rgbObject = hex2rgb(myColor);
trace("the hex number in rgb format: "+rgbObject.r+", "+rgbObject.g+", "+rgbObject.b);
trace("the hex number in decimal format: " + myColorTransform.rgb);
displayColors(myColorTransform.rgb);
}
//bitwise conversion of rgb color to a hex value
function rgb2hex(r, g, b):Number {
return(r<<16 | g<<8 | b);
}
//bitwise conversion of a hex color into rgb values
function hex2rgb (hex):Object{
var red = hex>>16;
var greenBlue = hex-(red<<16)
var green = greenBlue>>8;
var blue = greenBlue - (green << 8);
//trace("r: " + red + " g: " + green + " b: " + blue);
return({r:red, g:green, b:blue});
}
//BUTTONS
randomColor.onRelease = function() {
//make random number (within hex number range)
var theColor = Math.floor(Math.random() * 16777215);
//set ball color to random color value
setColor(colorBall.inner, theColor);
}
readHexColor.onRelease = function() {
//convert 6 character input string into hex color format used by actionscript
var theColor = "0x"+hexColorIn.text;
//set ball color to hex color value
setColor(colorBall.inner, theColor);
}
readRGBColor.onRelease = function() {
//convert rgb values into hex value
var theColor = rgb2hex(redColorIn.text, greenColorIn.text, blueColorIn.text);
//set ball color to converted hex color value
setColor(colorBall.inner, theColor);
}
readDecColor.onRelease = function() {
//convert rgb values into hex value
var theColor = decColorIn.text;
//set ball color to converted hex color value
setColor(colorBall.inner, theColor);
} |
Open Source Download
color.zip (containing color.fla and color.swf)
Author: Evan Mullins | Filed under: tutorial
Tags: actionscript, animation, as2, color, download, flash, interactive, open source, tutorial
