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added bar title #31

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added bar title #31

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37 changes: 36 additions & 1 deletion ARCharts/ARBarChart.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -157,16 +157,19 @@ public class ARBarChart: SCNNode {

self.addChildNode(barNode)

//Add value title on top of every bar
self.addTitle(barNode: barNode, barBox: barBox)

if series == 0 {
self.addLabel(forIndex: index, atXPosition: xPosition + xShift, withMaxHeight: barWidth)
}
previousXPosition = xPosition

presenter?.addAnimation(to: barNode, in: self)
}

self.addLabel(forSeries: series, atZPosition: zPosition + zShift, withMaxHeight: barLength)
previousZPosition = zPosition

}
}

Expand Down Expand Up @@ -295,6 +298,7 @@ public class ARBarChart: SCNNode {

return previousIndexXPosition + indexSize + indexSize * gapSize
}


/**
* Calculates the Z position (Series Axis) for a specific series.
Expand Down Expand Up @@ -343,6 +347,37 @@ public class ARBarChart: SCNNode {
}
}

/**
* Add a bar title on top of every bar
* - parameter bar: the ARChartBar to find height, seriesNo and indexNo.
* - parameter box: the SCNBox object to find geometry of the Bar.
*/
private func addTitle(barNode bar: ARBarChartBar, barBox box: SCNBox) {
let titleLabelText = String(dataSource!.barChart(self, valueAtIndex: bar.index, forSeries: bar.series))
let titleLabel = SCNText(string: titleLabelText, extrusionDepth: 0.0)
titleLabel.truncationMode = kCATruncationNone
titleLabel.alignmentMode = kCAAlignmentCenter
titleLabel.firstMaterial!.isDoubleSided = true
titleLabel.firstMaterial!.diffuse.contents = delegate!.barChart(self, colorForLabelForTitle: Int("\(bar.series)\(bar.index)")!)

//TODO: Did type casting to give unique id
let backgroundColor = delegate!.barChart(self, backgroundColorForLabelForTitle: Int("\(bar.series)\(bar.index)")!)
let barNameLabelNode = ARChartLabel(text: titleLabel, type: .title, id: Int("\(bar.series)\(bar.index)")!, backgroundColor: backgroundColor)

let unscaledLabelWidth = barNameLabelNode.boundingBox.max.x - barNameLabelNode.boundingBox.min.x
let desiredLabelWidth = box.length
let unscaledLabelHeight = barNameLabelNode.boundingBox.max.y - barNameLabelNode.boundingBox.min.y
let labelScale = min(Float(desiredLabelWidth) / unscaledLabelWidth, Float(bar.finalHeight) / Float(unscaledLabelHeight))
barNameLabelNode.scale = SCNVector3(labelScale, labelScale, labelScale)

let position = SCNVector3(x: bar.position.x,
y: bar.finalHeight,
z: bar.position.z - Float(box.length/2))
barNameLabelNode.position = position
barNameLabelNode.eulerAngles = SCNVector3(0.0, -0.5 * Float.pi, 0.0)
self.addChildNode(barNameLabelNode)
}

/**
* Add an index label to the X axis for a given index and at a given X position.
* - parameter index: The index (X axis) to be labeled.
Expand Down