shared x/y axes for multiple views

[manzt]

Alignment of multiple stacked views is import for accurate comparison of features across tracks. Currently "alignment" of 1D tracks with 2D matrices is accomplished by specifying xOffset or yOffset. Example:

• xOffset == 0
  

• xOffset == 30
  

I think this most often occurs when an axis is specified for a view that is not for other views. Especially since the width and height of a track do not include the space taken by the axes. While I don't think it is necessary, it would be convenient to add this "axis padding" to tracks without requiring users to specify a pixel offset.

[sehilyi]

I agree with this "smart default" idea on xOffset, and we can think about some potential cases that we want to handle. I think this issue happens mostly with the combination of 1D and 2D views, so we can focus on such cases.

A. Horizontal View + Matrix View (Screenshot above)

{ 
  arrangement: "vertical",
  views: [
    { /* View 1: Horizontal View */ },
    { /* View 2: 2D View */ }
  ]
}

If both View 1 and View 2 have the same linkingId (i.e., zooming is linked) and View 2 shows the y-axis on the left (like the screenshot above), then we can set a certain value to xOffset of View 1 so that both views are left-aligned. Probably, we can additionally check if both View 1 and View 2 have the same width. If width is not the same, then we may not align them.

B. Vertical View + Horizontal View + Matrix View

{ 
  arrangement: "horizontal",
  views: [
    { /* View 1: Vertical View */ },
    { 
      arrangement: "vertical",
      views: [
        { /* View 2: Horizontal View */ },
        { /* View 3: 2D View */ }
      ]  
    }
  ]
}
// or
{ 
  arrangement: "vertical",
  views: [
    { /* View 2: Horizontal View */ },
    { 
      arrangement: "horizontal",
      views: [
        { /* View 1: Vertical View */ },
        { /* View 3: 2D View */ }
      ]  
    }
  ]
}

If both View 1, View 2, and View 3 have the same linkingId, then we can left-align the View 2 and View 3 and top-align the View 1 and View 3.