Help creating a JavaScript mixin in Tapestry5?
- by shane87
I am creating a mixin which renders a javascript file when a textfield gains focus.
I am new to the idea of mixins in Tapestry, and I am unsure of where to place my original javascript file which i wish to run when the textfield gains focus.
The following is an example of my code:
The Java mixin class:
package asc.mixins;
import org.apache.tapestry5.RenderSupport;
import org.apache.tapestry5.annotations.AfterRender;
import org.apache.tapestry5.annotations.Environmental;
import org.apache.tapestry5.annotations.IncludeJavaScriptLibrary;
import org.apache.tapestry5.annotations.InjectContainer;
import org.apache.tapestry5.corelib.base.AbstractTextField;
@IncludeJavaScriptLibrary("js_dasher_mixin.js")
public class DasherMixin {
@Environmental
private RenderSupport renderSupport;
@InjectContainer
private AbstractTextField field;
@AfterRender
void addScript() {
this.renderSupport.addScript("new JSDasher('%s');",
this.field.getClientId());
}
}
The Javascript mixin file:
JSDasher = Class.create({
initialize: function(textField)
{
this.textField = $(textField);
this.textField.observe('focus', this.onFocus.bindAsEventListener(this));
},
onFocus: function(event)
{
//call my javascript init() function
}
}
part of my javascript file I wish to run when the textfield gains focus:
var posX, posY;
// Sets up our global variables and dispatches an init request to the server.
function init() {
posX=0;
posY=0;
canvas = document.getElementById("canvas");
canvasWidth = canvas.offsetWidth;
canvasHeight = canvas.offsetHeight;
if (canvas.getContext) {
ctx = canvas.getContext("2d");
}
canvas.onclick = canvasClicked;
canvas.onmousemove = mouseMoved;
canvasOffsetX = findPosX(canvas);
canvasOffsetY = findPosY(canvas);
sessID = -1;
sendInitRQ(canvasWidth, canvasHeight);
}
My javascript file is much larger than above, my question is where should I put my javascript code above?
Should it all be contained in the mixin.js file? if so where exactly should it go?
Thanks in advance for any help.
