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import "../../Canvas"
import Qt 4.7
Canvas {
width:600
height:400
property int count:6
Column {
id:sliders
y:30
anchors.right: parent.right
anchors.margins: 30
spacing:12
Slider { nodecolor: "#88aaaa" ; onValueChanged:{draw()}}
Slider { nodecolor: "#aa8888" ; onValueChanged:{draw()}}
Slider { nodecolor: "#4488aa" ; onValueChanged:{draw()}}
Slider { nodecolor: "#444499" ; onValueChanged:{draw()}}
Slider { nodecolor: "#aa4444" ; onValueChanged:{draw()}}
Slider { nodecolor: "#559966" ; onValueChanged:{draw()}}
}
function draw() {
var ctx = getContext();
var graphPadding = 20;
var cHeight = height;
var cWidth = width;
var grad = ctx.createLinearGradient(0, 0, 0, height);
grad.addColorStop(0, '#fff'); // red
grad.addColorStop(1, '#ccc'); // yellow
ctx.fillStyle = grad;
ctx.fillRect(0, 0, width, height);
ctx.strokeStyle = "rgb(150,150,150)";
ctx.lineWidth = 2;
// Draw Axis
ctx.beginPath();
ctx.moveTo(graphPadding, graphPadding);
ctx.lineTo(graphPadding,cHeight - graphPadding);
ctx.lineTo(cWidth - graphPadding, cHeight - graphPadding);
ctx.stroke();
ctx.closePath();
// Display a point for each slider, spaced equally
var availableSpace = cWidth - (graphPadding * count);
var horizSpace = availableSpace / count;
var vertSpace = cHeight - (graphPadding * count);
// Create an array of y points
var points = new Array();
for(var i = 0;i < count;i++){
// Get Ypos
var yPercent = (sliders.children[i].value - 100) * -1;
var yPos = (vertSpace * (yPercent / 100) + (graphPadding * 2));
points.push(yPos);
}
// Draw Lines
var xPos = graphPadding * 2;
ctx.beginPath();
for(i = 0;i < count;i++){
if(i == 0)
ctx.moveTo(xPos, points[i]);
else
ctx.lineTo(xPos, points[i]);
xPos += horizSpace;
}
ctx.stroke();
ctx.closePath();
// Draw Dots
var xPos = graphPadding * 2;
for(i = 0;i < count;i++){
drawCircle(ctx, xPos, points[i], count, sliders.children[i].nodecolor);
xPos += horizSpace;
}
// Draw Axis
ctx.lineWidth = 1;
ctx.strokeStyle = "rgba(0, 0, 0, 0.05)"
for (var y = 0; y < height - graphPadding; y += height/20) {
ctx.moveTo(graphPadding, y);
ctx.lineTo(width - graphPadding, y);
}
ctx.stroke();
ctx.beginPath();
ctx.moveTo(graphPadding, graphPadding);
ctx.lineTo(graphPadding,cHeight - graphPadding);
ctx.lineTo(cWidth - graphPadding, cHeight - graphPadding);
ctx.stroke();
ctx.closePath();
}
function drawCircle(ctx, x, y, radius, colour){
ctx.save();
ctx.fillStyle = colour;
ctx.beginPath();
ctx.arc(x-1, y-1, radius,0,Math.PI*2,true); // Outer circle
ctx.fill();
ctx.restore();
}
}
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