Simple keyboard

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license : MIT License
modified : 2009-08-19 23:38:18

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<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" creationComplete="_onCreate();">
 <mx:Script>
 <![CDATA[
 // The SiONs preset voices are from VAL-SOUND
 // http://www.valsound.com/
 //--------------------------------------------------
 import flash.events.*;
 import flash.display.*;
 import flash.text.*;
 import mx.events.*;
 import mx.core.UIComponent;
 import mx.collections.ArrayCollection;
 
 import org.si.sion.*;
 import org.si.sion.effector.*;
 import org.si.sion.events.*;
 import org.si.sion.sequencer.SiMMLTrack;
 import org.si.sion.utils.SiONPresetVoice;
 
 
 
 
 // variables
 //------------------------------
 private var driver:SiONDriver = new SiONDriver();
 private var presetVoice:SiONPresetVoice = new SiONPresetVoice();
 private var keyboardKeys:String = 'zsxdcvgbhnjm,l.;/';
 private var keyboardCodeTable:Vector.<int> = new Vector.<int>(17);
 private var keyboardDisplay:UIComponent = new UIComponent();
 private var keys :Vector.<Sprite> = new Vector.<Sprite>(17);
 private var keyOn:Vector.<Shape> = new Vector.<Shape>(17);
 
 private var currentVoice:SiONVoice;
 private var keyboardFlag:uint;
 private var octave:int;
 
 private var delaySendLevel:Number;
 private var chorusSendLevel:Number;
 
 
 
 
 // initializer
 //------------------------------
 private function _onCreate() : void {
 var i:int;
 
 // event listeners
 driver.addEventListener(SiONTrackEvent.NOTE_ON_FRAME, _onNoteOnFrame);
 driver.addEventListener(SiONTrackEvent.NOTE_OFF_FRAME, _onNoteOffFrame);
 addEventListener("keyDown", _onKeyDown);
 addEventListener("keyUp", _onKeyUp);
 
 // keyboard display
 createDisplay();
 
 // set selector items
 var categ:Array, list:Array = [];
 for each (categ in presetVoice.categolies) list.push({label:categ["name"]});
 categSelect.dataProvider = new ArrayCollection(list);
 _onFileSelectorChange();

// initialize parameters
 for (i=0; i<17; i++) keyboardCodeTable[i] = keyboardKeys.charCodeAt(i);
 delaySendLevel = 0.25;
 chorusSendLevel = 0;
 keyboardFlag = 0;
 octave = 5;
 currentVoice = presetVoice["sine"];

// effector setting
 var dly:SiEffectStereoDelay = new SiEffectStereoDelay();
 dly.initialize();
 dly.setParameters(200,0.2,false);
 var cho:SiEffectStereoChorus = new SiEffectStereoChorus();
 cho.initialize();
 cho.setParameters(20,0.2,4,20);
 driver.effector.initialize();
 driver.effector.connect(1, dly);
 driver.effector.connect(2, cho);
 
 // start stream without initializing effector
 driver.play(null, false);
 }
 
 private function createDisplay() : void
 {
 var tf:TextField, k:int, x:Number, pk:int, 
 wk:Array = [0,1,0,1,0,0,1,0,1,0,1,0,0,1,0,1,0],
 cmd:Vector.<int> = Vector.<int>([1,2,2,2,2]),
 vts:Array = [Vector.<Number>([0,20, 0,140, 30,140, 30,20, 0,20]), 
 Vector.<Number>([5,20, 5,100, 25,100, 25,20, 5,20])];
 for (k=0, x=-32, pk=0; k<17; k++) {
 x += (wk[k] == pk) ? 30 : 15;
 pk = wk[k];
 keys[k] = new Sprite();
 keyOn[k] = new Shape();
 if (wk[k]==0) _setKeyColor(0xffffff, 0x000080, '0', 120); // white keys
 else _setKeyColor(0x404040, 0x8080ff, '#ffffff', 80); // black keys
 keyOn[k].graphics.drawPath(cmd, vts[wk[k]]);
 keyOn[k].graphics.endFill();
 keyOn[k].visible = false;
 keys[k].graphics.lineStyle(2, 0x000000);
 keys[k].graphics.drawPath(cmd, vts[wk[k]]);
 keys[k].graphics.endFill();
 keys[k].addChild(tf);
 keys[k].addChild(keyOn[k]);
 keys[k].x = x;
 if (wk[k]==0) keyboardDisplay.addChild(keys[k]);
 }
 for (k=0; k<17; k++) if (wk[k]==1) keyboardDisplay.addChild(keys[k]);
 tf = new TextField();
 tf.htmlText = "＜q";
 tf.x = 0;
 tf.y = 140;
 keyboardDisplay.addChild(tf);
 tf = new TextField();
 tf.htmlText = "w＞";
 tf.x = 270;
 tf.y = 140;
 keyboardDisplay.addChild(tf);
 keyboardDisplay.x = 84;
 keyboardDisplay.y = 212;
 addChild(keyboardDisplay);
 
 function _setKeyColor(face:int, faceOn:int, letter:String, tfy:int) : void {
 keys[k].graphics.beginFill(face);
 keyOn[k].graphics.beginFill(faceOn, 0.5);
 tf = new TextField();
 tf.htmlText = "" + keyboardKeys.charAt(k) + "";
 tf.x = 7;
 tf.y = tfy;
 }
 }
 
 
 
 
 // operations
 //------------------------------
 private function _focusReset() : void {
 stage.focus = keyboardDisplay;
 }
 
 private function _allNoteOff() : void {
 var i:int, baseNote:int = octave*12;
 for (i=0; i<17; i++) driver.noteOff(i+baseNote);
 }
 
 private function _refleshChannelSelector(categolyList:Array) : void {
 var i:int, imax:int=categolyList.length, list:Array=[];
 for (i=0; i<imax; i++) list.push({label:String(i+1)+": "+categolyList[i].name});
 voiceSelect.dataProvider = new ArrayCollection(list);
 voiceSelect.selectedIndex = 0;
 }
 
 
 
 
 // driver events
 //------------------------------
 private function _onNoteOnFrame(e:SiONTrackEvent) : void {
 var key:int = e.note - octave*12;
 while (key<0) key += 12;
 while (key>16) key -= 12;
 keyOn[key].visible = true;
 }
 
 private function _onNoteOffFrame(e:SiONTrackEvent) : void {
 var key:int = e.note - octave*12;
 while (key<0) key += 12;
 while (key>16) key -= 12;
 keyOn[key].visible = false;
 }
 
 
 
 
 // keyboard events
 //------------------------------
 private function _onKeyDown(e:KeyboardEvent) : void {
 for (var i:int=0; i<17; i++) {
 if (keyboardCodeTable[i] == e.charCode) {
 var flag:uint = 1<<i;
 if ((keyboardFlag & flag) == 0) {
 keyboardFlag |= flag;
 var trk:SiMMLTrack = driver.noteOn(i+octave*12, currentVoice, 0, 0, 0, 0, 0, 1, 1);
 trk.channel.setStreamSend(1, delaySendLevel);
 trk.channel.setStreamSend(2, chorusSendLevel);
 }
 return;
 }
 }
 
 if (driver.isPlaying) {
 switch (String.fromCharCode(e.charCode)) {
 case 'w':
 _allNoteOff();
 if (++octave>7) octave = 7;
 break;
 case 'q':
 _allNoteOff();
 if (--octave<2) octave = 2;
 break;
 }
 }
 }
 
 private function _onKeyUp(e:KeyboardEvent) : void {
 for (var i:int=0; i<17; i++) {
 if (keyboardCodeTable[i] == e.charCode) {
 var flag:uint = 1<<i;
 if ((keyboardFlag & flag) != 0) {
 keyboardFlag &= ~flag;
 driver.noteOff(i+octave*12);
 }
 return;
 }
 }
 }
 
 
 
 
 // UI events
 //------------------------------
 private function _onFileSelectorChange() : void {
 _refleshChannelSelector(presetVoice.categolies[categSelect.selectedIndex]);
 _onChannelSelectorChange();
 }
 
 private function _onChannelSelectorChange() : void {
 if (voiceSelect.selectedItem == null) return;
 currentVoice = presetVoice.categolies[categSelect.selectedIndex][voiceSelect.selectedIndex];
 }
 
 private function changeEffectSend() : void {
 delaySendLevel = delaySend.value * 0.01;
 chorusSendLevel = chorusSend.value * 0.01;
 for each (var trk:SiMMLTrack in driver.sequencer.tracks) {
 trk.channel.setStreamSend(1, delaySendLevel);
 trk.channel.setStreamSend(2, chorusSendLevel);
 }
 }
 ]]>
 </mx:Script>
 
 <mx:TitleWindow title="Simple Keyboard" x="72" y="72" width="320" height="320" paddingTop="2" paddingBottom="2" paddingLeft="2" paddingRight="2">
 <mx:ComboBox id="categSelect" width="296" height="24" dropdownWidth="240" rowCount="6" fontSize="10" fontWeight="normal" change="_onFileSelectorChange();" close ="_focusReset();"/>
 <mx:ComboBox id="voiceSelect" width="296" height="24" dropdownWidth="240" rowCount="6" fontSize="10" fontWeight="normal" change="_onChannelSelectorChange();" close ="_focusReset();"/>
 <mx:HBox>
 <mx:Label text="Delay" width="60"/>
 <mx:HSlider id="delaySend" width="220" height="24" maximum="100" tickInterval="10" snapInterval="5" value="25" change="changeEffectSend();"/>
 </mx:HBox>
 <mx:HBox>
 <mx:Label text="Chorus" width="60"/>
 <mx:HSlider id="chorusSend" width="220" height="24" maximum="100" tickInterval="10" snapInterval="5" value="0" change="changeEffectSend();"/>
 </mx:HBox>
 </mx:TitleWindow>
</mx:Application>

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