javascript - many very confusing problems with kinetic.js -


i got problems understanding kinetic.js (the documentation horrible newbies...) hope can explain bad english.

problem 1: everytime when #reset canvas not resetting it. more pushing background image on actual canvas , when click on it jumps original... 

function clearcanvas() { context.clearrect(0, 0, 1000, 1000);   //whole canvas context.drawimage(buehneobj,0,0);      //redraw main background image }

and call with:

reset = document.getelementbyid('reset'); document.getelementbyid('reset').onclick =function(){clearcanvas(); }

problem 2: slider build scaling image not working @ dont see problem... ...the variables global , if test alert see values existing...

standard jquery slider:

$('#scaleslider').slider({         animate: "fast",         step: 0.1,         value: 1,         min: 0.1,         max: 1,         slide: function(event,ui){groesse = ui.value} //global variable });

i made hidden(display:none) , on click "block"

var scaleslider = document.getelementbyid('scaleslider').style; document.getelementbyid('resize').onclick =function(){ scaleslider.display ="block";}

and here's how kinetic parts (dragmotiv first start image) "groesse" variable x , y slider value(they can same scales correct):

var dragmotiv = new kinetic.image({       image: imageobj,       x: 250,       y: 300,       width: 330,       height: 263,       rotationdeg: 0,       scale: { x:groesse, y:groesse },       draggable: true,       dragboundfunc: function(pos) {          var newy = pos.y < 290 ? 290 : pos.y > 305 ? 305 : pos.y;         var newx = pos.x < 250 ? 250 : pos.x > 390 ? 390 : pos.x;         return {           x: newx,           y: newy         };       }     });

problem 3: saving not possible @ all.

i uploaded server let guys take @ it. know there 1 little thingy dont see(i hope so).

http://manufaktur13.de/playground/canvas_kinetic.html

i think should not clear canvas, instead should keep record have drown , remove items, , redraw layer.


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