Use isc namespace to eliminate the possibility of JS name collisions
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<!-- The following code is revised from SmartClient demo code(SmartClient_70rc2_LGPL.zip).-->
<HTML><HEAD>
<SCRIPT>
var isc_useSimpleNames = false;
var isomorphicDir = "isomorphic/";
</SCRIPT>
<SCRIPT SRC=isomorphic/system/modules/ISC_Core.js></SCRIPT>
<SCRIPT SRC=isomorphic/system/modules/ISC_Foundation.js></SCRIPT>
<SCRIPT SRC=isomorphic/system/modules/ISC_Containers.js></SCRIPT>
<SCRIPT SRC=isomorphic/system/modules/ISC_Grids.js></SCRIPT>
<SCRIPT SRC=isomorphic/system/modules/ISC_Forms.js></SCRIPT>
<SCRIPT SRC=isomorphic/system/modules/ISC_DataBinding.js></SCRIPT>
<SCRIPT SRC=isomorphic/skins/standard/load_skin.js></SCRIPT>
<SCRIPT>
/*----------> SimpleSlider_9.js <----------*/
// Step 9
// * use "isc" namespace to eliminate the possibility of JS name collisions
isc.ClassFactory.defineClass("SimpleSlider", isc.Canvas);
isc.SimpleSlider.addClassProperties({
VERTICAL_SRC_PREFIX:"v",
HORIZONTAL_SRC_PREFIX:"h",
DOWN:"down",
UP:"",
ON:"",
OFF:"off",
EVENTNAME:"sliderMove"
});
isc.SimpleSlider.addProperties({
length:200,
vertical:true,
thumbThickWidth:23,
thumbThinWidth:17,
trackWidth:7,
trackCapSize:6,
skinImgDir:"examples/custom_components/SimpleSlider/images/SimpleSlider/",
thumbSrc:"thumb.gif",
trackSrc:"track.gif",
value:0,
sliderTarget:null,
initWidget : function () {
this.Super("initWidget", arguments);
var width, height;
if (this.vertical) {
width = Math.max(this.thumbThickWidth, this.trackWidth);
height = this.length;
} else {
width = this.length;
height = Math.max(this.thumbThickWidth, this.trackWidth);
}
this.setWidth(width);
this.setHeight(height);
this._usableLength = this.length-this.thumbThinWidth;
this._track = this.addChild(this._createTrack());
this._thumb = this.addChild(this._createThumb());
this.setValue(this.value);
this.setDisabled(this.disabled);
},
_createTrack : function () {
return isc.StretchImg.create({
autoDraw:false,
left:(this.vertical ? Math.floor((this.getWidth() - this.trackWidth)/2) : 0),
top:(this.vertical ? 0 : Math.floor((this.getHeight() - this.trackWidth)/2)),
width:(this.vertical ? this.trackWidth : this.getWidth()),
height:(this.vertical ? this.getHeight() : this.trackWidth),
vertical:this.vertical,
capSize:this.trackCapSize,
src:"[SKIN]" + (this.vertical ? "v" : "h") + this.trackSrc,
skinImgDir:this.skinImgDir
});
},
_createThumb : function () {
return isc.Img.create({
autoDraw:false,
left:(this.vertical ? Math.floor((this.getWidth() - this.thumbThickWidth)/2) : 0),
top:(this.vertical ? 0 : Math.floor((this.getHeight() - this.thumbThickWidth)/2)),
width:(this.vertical ? this.thumbThickWidth : this.thumbThinWidth),
height:(this.vertical ? this.thumbThinWidth : this.thumbThickWidth),
src:"[SKIN]" + (this.vertical ? "v" : "h") + this.thumbSrc,
skinImgDir:this.skinImgDir,
canDrag:true,
dragAppearance:isc.EventHandler.NONE,
cursor:isc.Canvas.HAND,
dragMove:"this.parentElement._thumbMove(); return false",
dragStart:isc.EventHandler.stopBubbling,
dragStop:"this.setState(isc.SimpleSlider.UP); return false",
mouseDown:"this.setState(isc.SimpleSlider.DOWN)",
mouseUp:"this.setState(isc.SimpleSlider.UP); return false"
});
},
_thumbMove : function () {
var thumbPosition;
if (this.vertical) {
thumbPosition = isc.EventHandler.getY() - this.getPageTop();
thumbPosition = Math.max(0, Math.min(this._usableLength, thumbPosition));
if (thumbPosition == this._thumb.getTop()) return;
this._thumb.setTop(thumbPosition);
} else {
thumbPosition = isc.EventHandler.getX() - this.getPageLeft();
thumbPosition = Math.max(0, Math.min(this._usableLength, thumbPosition));
if (thumbPosition == this._thumb.getLeft()) return;
this._thumb.setLeft(thumbPosition);
}
this.value = thumbPosition/this._usableLength;
this.valueChanged();
if (this.sliderTarget) isc.EventHandler.handleEvent(this.sliderTarget, isc.SimpleSlider.EVENTNAME, this);
},
setValue : function (newValue) {
if (!isc.isA.Number(newValue)) return;
this.value = Math.max(0, Math.min(newValue, 1));
var thumbPosition = this.value * this._usableLength;
if (this.vertical)
this._thumb.setTop(thumbPosition);
else
this._thumb.setLeft(thumbPosition);
this.valueChanged();
if (this.sliderTarget) isc.EventHandler.handleEvent(this.sliderTarget, isc.SimpleSlider.EVENTNAME, this);
},
getValue : function () {
return this.value;
},
valueChanged : function () {
},
setDisabled : function (disabled) {
this.Super("setDisabled",arguments);
if (!disabled) {
this._track.setState(isc.SimpleSlider.ON);
this._thumb.setState(isc.SimpleSlider.UP);
this._thumb.setCursor(isc.Canvas.HAND);
} else {
this._track.setState(isc.SimpleSlider.OFF);
this._thumb.setState(isc.SimpleSlider.OFF);
this._thumb.setCursor(isc.Canvas.DEFAULT);
}
}
});
</SCRIPT>
</HEAD><BODY BGCOLOR='powderblue'>
<SCRIPT>
// override default skin directory to pick up local slider images
isc.Page.setSkinDir("");
//--------------------------------------------------
// display area for targeted sliderMove events
//--------------------------------------------------
isc.Label.create({
ID:"display",
left:150,
top:50,
height:20,
sliderMove:function(event,slider){
this.setContents("sliderMove event<br>" +
slider.getID() + ": " + slider.value);
}
});
//--------------------------------------------------
// global handler for sliderMove events
//--------------------------------------------------
isc.Label.create({
ID:"globalDisplay",
left:300,
top:50,
height:20
});
isc.Page.setEvent(
"sliderMove",
"globalDisplay.setContents('Global handler<br>' + eventInfo.ID + ': ' + eventInfo.value);"
);
//--------------------------------------------------
// sliders
//--------------------------------------------------
isc.SimpleSlider.create({
ID:"vSlider",
left:100,
top:100,
value:0.3,
sliderTarget:display
});
isc.SimpleSlider.create({
ID:"hSlider",
left:300,
top:180,
vertical:false,
value:0.5,
sliderTarget:display
});
//--------------------------------------------------
// display areas for observed slider values
//--------------------------------------------------
isc.Label.create({
ID:"vSliderObserver",
left:20,
top:320,
height:20
});
vSliderObserver.observe(vSlider, "valueChanged", "observer.setContents(observed.value)");
isc.Label.create({
ID:"hSliderObserver",
left:300,
top:320,
height:20
});
hSliderObserver.observe(hSlider, "valueChanged", "observer.setContents(observed.value)");
//--------------------------------------------------
// buttons to enable/disable sliders
//--------------------------------------------------
isc.Button.create({
left:70,
top:20,
width:120,
title:"Enable sliders",
click:"vSlider.enable();hSlider.enable()"
});
isc.Button.create({
left:220,
top:20,
width:120,
title:"Disable sliders",
click:"vSlider.disable();hSlider.disable()"
});
</SCRIPT>
</BODY>
</HTML>
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