User:Psephomancy/Sandbox: Difference between revisions
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Line 192:
"cornerRadius": {"signal": "cornerRadius"}
}
}
}
]
}
</graph>
== Interactive ==
<graph>
{
// We want to use Vega 2, and specify image size
"version": 2, "width": 300, "height": 80,
// Set padding to the same value on all sides
"padding": 12,
// By default the background is transparent
"background": "#edf1f7",
"signals": [
{
"name": "isDragging",
"init": false,
"streams": [
{"type": "@handle:mousedown","expr": "true"},
{"type": "mouseup","expr": "false"}
]
},
{
"name": "scaledHandlePosition",
"streams": [
{
"type": "mousemove[isDragging]",
"expr": "eventX()",
"scale": {"name": "yearsScale","invert": true}
}
]
},
{
"name": "currentYear",
"init": 2000,
"expr": "clamp(parseInt(scaledHandlePosition),1960,2013)"
}
],
"scales": [
{
"name": "yearsScale",
"type": "linear",
"zero": false,
"domain": [1960, 2013],
"range": "width"
}
],
"marks": [
{
// draw the year label in the upper left corner
"name": "yearLabel",
"type": "text",
"properties": {
"enter": {
"x": {"value": 0},
"y": {"value": 25},
"fontSize": {"value": 32},
"fontWeight": {"value": "bold"},
"fill": {"value": "steelblue"}
},
"update": {"text": {"signal": "currentYear"} }
}
},
{
// Draw a horizontal line
"name": "scrollLine",
"type": "rule",
"properties": {
"enter": {
"x": {"value": 0},
"y": {"value": 40},
"x2": {"value": 300},
"stroke": {"value": "#000"},
"strokeWidth": {"value": 2}
}
}
},
{
// Draw a triangle shape with a hover effect
// naming objects allows us to reference them later
"name": "handle",
"type": "path",
"properties": {
"enter": {
"y": {"value": 40},
// path syntax is the same as SVG's path tag
"path": {"value": "m-5.5,-10l0,20l11.5,-10l-11.5,-10z"},
"stroke": {"value": "#880"},
"strokeWidth": {"value": 2.5}
},
"update": {
"x": {"scale": "yearsScale","signal": "currentYear"},
"fill": {"value": "#fff"}
},
// Change fill color of the object on mouse hover
"hover": {"fill": {"value": "#f00"} }
}
}
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