Mega Code Archive
Button widget
<![CDATA[
http://dynapi.sourceforge.net/
GNU LESSER GENERAL PUBLIC LICENSE
Version 2.1, February 1999
<html>
<head><title>DynAPI Tutor - Button widget</title>
<script language="Javascript" src="./dynapisrc/dynapi.js"></script>
<script language="Javascript">
dynapi.library.setPath('./dynapisrc/');
dynapi.library.include('dynapi.api');
</script>
<script language="Javascript">
//The widget (later we include it as a .js file)
function Button(x,y,w,h,caption) {
this.Dynlayer=DynLayer;
this.Dynlayer(null,x,y,w,h);
this.caption=caption||'';
this.onPreCreate(Button.PreCreate);
this.addEventListener(Button.listener);
}
var p = dynapi.setPrototype('Button','DynLayer');
Button.PreCreate = function() {
this.setBgColor('#c0c0c0') // make the widget look gray
// create child layer for caption
this.addChild(new DynLayer(null,1,1,this.w-2,this.h-2),'dyncaption');
this.dyncaption.setHTML('<center>'+this.caption+'</center>');
// add 3D looking borders at the edges of the widget
this.BorderL=new DynLayer(null,0,0,1,this.h,'#f0f0f0');
this.BorderT=new DynLayer(null,0,0,this.w,1,'#f0f0f0');
this.BorderR=new DynLayer(null,this.w-1,1,1,this.h-1,'#808080');
this.BorderB=new DynLayer(null,1,this.h-1,this.w-1,1,'#808080');
this.addChild(this.BorderL);
this.addChild(this.BorderT);
this.addChild(this.BorderR);
this.addChild(this.BorderB);
this.setVisible(true); // make sure the widget is visible
// add layer for event handling
this.dynevents = new DynLayer(null,0,0,this.w,this.h);
this.addChild(this.dynevents);
}
Button.listener = {
onmousedown : function(e) { // add onmousedown handler
var o=e.getSource();
// switch colors to make the button look pressed
o.BorderL.setBgColor('#808080');
o.BorderR.setBgColor('#f0f0f0');
o.BorderT.setBgColor('#808080');
o.BorderB.setBgColor('#f0f0f0');
},
onmouseup : function(e) {
var o=e.getSource();
// switch colors to make the button look normal
o.BorderL.setBgColor('#f0f0f0');
o.BorderR.setBgColor('#808080');
o.BorderT.setBgColor('#f0f0f0');
o.BorderB.setBgColor('#808080');
o.invokeEvent("pressed"); // new line to invoke the onpressed() event
}
}
myListener = {
onpressed : function(e) {
var o=e.getSource();
alert('You hit '+o.caption+'!')
}
}
myButton=new Button(100,100,80,23,'Ok')
myButton.addEventListener(myListener);
myButton2=new Button(180,100,80,23,'Cancel')
myButton2.addEventListener(myListener);
dynapi.document.addChild(myButton);
dynapi.document.addChild(myButton2);
</script>
</head>
<body bgcolor=#d0d0d0>
</body>
</html>
dynapi.zip( 791 k)
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