Flex Air 实现桌面尺子(Ruler)工具

最近在使用Flex Air写桌面应用，因为有个测量的需求，就想着自己写个尺子来用。经过琢磨，写了个简陋版，希望大家指正。先上图:

以下是代码:

<?xml version="1.0" encoding="utf-8"?>
<s:WindowedApplication xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark" xmlns:mx="library://ns.adobe.com/flex/mx"showStatusBar="false" minWidth="80" minHeight="80"alpha="0.7" doubleClickEnabled="true"initialize="appInitializeHandler(event)"creationComplete="appCreationCompleteHandler(event)"applicationComplete="init(event)"mouseMove="appMouseMoveHandler(event)"><fx:Script><![CDATA[import mx.controls.Menu;import mx.events.FlexEvent;import mx.events.MenuEvent;import spark.layouts.HorizontalLayout;private var properties:Object = new Object();private var appMenu:Menu;private var mode:String;protected function init(event:FlexEvent):void {this.stage.addEventListener(KeyboardEvent.KEY_DOWN, appKeyDownHandler);this.stage.addEventListener(MouseEvent.RIGHT_CLICK, appRightClickHandler);this.stage.addEventListener(MouseEvent.DOUBLE_CLICK, appDoubleClickHandler);}override protected function createChildren():void {super.createChildren();var menuData:Array = [{label: "退出", id: "AppExt"}];appMenu = Menu.createMenu(this, menuData);appMenu.addEventListener(MenuEvent.ITEM_CLICK, menuItemClickHandler);}protected function menuItemClickHandler(event:MenuEvent):void {if(event.item["id"] == "AppExt") {nativeWindow.close();}}override protected function mouseDownHandler(event:MouseEvent):void {this.nativeWindow.startMove();}protected function appMouseMoveHandler(event:MouseEvent):void {if(!event.altKey) {return;}if(mode == "h") {lineGrp.y = 0;lineGrp.x = mouseX;showText((lineGrp.x + 1) + "");}else if(mode == "v") {lineGrp.x = 0;lineGrp.y = mouseY;showText((lineGrp.y + 1) + "");}}protected function appKeyDownHandler(event:KeyboardEvent):void {if(!(event.keyCode == Keyboard.LEFT && event.keyCode == Keyboard.RIGHT && event.keyCode == Keyboard.DOWN &&event.keyCode == Keyboard.UP)) {return;}if(event.keyCode == Keyboard.LEFT) {if(lineGrp.x == 0) {return;}lineGrp.x -= 1;}if(event.keyCode == Keyboard.RIGHT) {lineGrp.x += 1;}showText((lineGrp.x + 1) + "");}private function showText(text:String):void {display.text = text;}protected function appDoubleClickHandler(event:MouseEvent):void {mode = mode == "h" ? "v" : "h";appChanged();}override public function get minWidth():Number {return 80;}protected function appRightClickHandler(event:MouseEvent):void {appMenu.show(event.stageX, event.stageY);}protected function appInitializeHandler(event:FlexEvent):void {var init:File = File.applicationDirectory.resolvePath("Ruler.ini");var reader:FileStream = new FileStream();reader.open(init, FileMode.READ);var initValues:Array = reader.readUTFBytes(reader.bytesAvailable).split("\r\n");for each(var value:String in initValues) {var property:Array = value.split("=");properties[property[0]] = property[1];}reader.close();}protected function appCreationCompleteHandler(event:FlexEvent):void {mode = getProperty("initMode");appChanged();}private function appChanged():void {if(mode == "h") {lineGrp.x = 20;lineGrp.y = 0;lineGrp.width = 3;lineGrp.percentHeight = 100;line.width = 0;line.percentHeight = 100;ticks.percentWidth = 100;ticks.height = 20;leftResizer.enabled = rightResizer.enabled = true;upResizer.enabled = downResizer.enabled = false;labelGrp.layout = new VerticalLayout();this.width = Number(getProperty("initHWidth"));this.height = Number(getProperty("initHHeight"));}else if(mode == "v") {lineGrp.x = 0;lineGrp.y = 20;lineGrp.percentWidth = 100;lineGrp.height = 3;line.percentWidth = 100;line.height = 0;ticks.width = 20;ticks.percentHeight = 100;leftResizer.enabled = rightResizer.enabled = false;upResizer.enabled = downResizer.enabled = true;labelGrp.layout = new HorizontalLayout();this.width = Number(getProperty("initVWidth"));this.height = Number(getProperty("initVHeight"));}drawTicks();layoutResizer();}override protected function updateDisplayList(unscaledWidth:Number, unscaledHeight:Number):void {if(mode == "v") {unscaledWidth = 80;}else if(mode == "h") {unscaledHeight = 80;}super.updateDisplayList(unscaledWidth, unscaledHeight);}private function getProperty(key:String):String {return properties[key];}private function setProperty(key:String, value:String):void {properties[key] = value;}protected function resizerClickHandler(event:MouseEvent):void {var resizer:String = event.currentTarget.id;if(resizer == "leftResizer") {this.width -= 100;}else if(resizer == "rightResizer") {this.width += 100;}else if(resizer == "upResizer") {this.height -= 40;}else if(resizer == "downResizer") {this.height += 40;}drawTicks();layoutResizer();}private function drawTicks():void {ticks.removeAllElements();var g:Graphics = ticks.graphics;g.clear();g.lineStyle(0, 0x000000);if(mode == "h") {for(var i:int = 0; i < this.width; i++) {if(i % 50 == 0) {g.moveTo(i, 0);g.lineTo(i, 10);var hLabel:Label = new Label();hLabel.text = i + "";hLabel.setStyle("fontSize", 10);hLabel.x = i - (3 * (i + "").length);hLabel.y = 12;ticks.addElement(hLabel);}else if(i % 5 == 0) {g.moveTo(i, 0);g.lineTo(i, 5);}}}else if(mode == "v") {for(var j:int = 0; j < this.height; j++) {if(j % 50 == 0) {g.moveTo(0, j);g.lineTo(10, j);var vLabel:Label = new Label();vLabel.text = j + "";vLabel.setStyle("fontSize", 10);vLabel.x = 12;//i - (3 * (i + "").length);vLabel.y = j - 3;ticks.addElement(vLabel);}else if(j % 5 == 0) {g.moveTo(0, j);g.lineTo(5, j);}}}}private function layoutResizer():void {if(mode == "v") {resizerGrp.x = 80 - 48;}else {resizerGrp.x = this.width - 5 - 48;}resizerGrp.y = this.height - 5 - 48;}protected function resizerDoubleClickHandler(event:MouseEvent):void {event.stopImmediatePropagation();}]]></fx:Script><s:BorderContainer id="ruler" width="100%" height="100%" borderVisible="false"><s:backgroundFill><s:SolidColor color="0x00FF00" alpha="0.4"></s:SolidColor></s:backgroundFill><s:Group id="labelGrp" width="100%" height="100%"><s:layout><s:VerticalLayout /></s:layout><s:Group id="ticks"></s:Group><s:Label id="display" width="100%" height="100%" textAlign="center" verticalAlign="middle" /></s:Group><s:Group id="resizerGrp" width="48" height="48"><s:Image id="upResizer" source="assets/up.png" x="11" y="0" click="resizerClickHandler(event)" doubleClickEnabled="false" doubleClick="resizerDoubleClickHandler(event)" /><s:Image id="downResizer" source="assets/down.png" x="11" y="22" click="resizerClickHandler(event)" doubleClickEnabled="false" doubleClick="resizerDoubleClickHandler(event)" /><s:Image id="leftResizer" source="assets/left.png" x="0" y="11" click="resizerClickHandler(event)" doubleClickEnabled="false" doubleClick="resizerDoubleClickHandler(event)" /><s:Image id="rightResizer" source="assets/right.png" x="22" y="11" click="resizerClickHandler(event)" doubleClickEnabled="false" doubleClick="resizerDoubleClickHandler(event)" /></s:Group><s:HGroup id="lineGrp" x="20" width="3" height="100%" horizontalAlign="center" verticalAlign="middle" ><s:Line id="line" height="100%"><s:stroke><s:SolidColorStroke weight="1" /></s:stroke></s:Line></s:HGroup></s:BorderContainer>
</s:WindowedApplication>

使用方法：按住alt键的同时移动鼠标，可以移动指示线；在尺子上双击，可以切换横竖模式；点击箭头可以增加减少尺子长度。

可执行文件下载地址: http://download.csdn.net/detail/ptheus/7343231

转载请著名出处，图迹科技www.togeek.cn

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