Class: Bar (private in BarChart3DWidget

• Inheritance
• Description
• Related information
• Class protocol
  • defaults
  • instance creation
• Instance protocol
  • accessing
  • drawing required
  • initialization
  • private accessing
  • private instance creation

Inheritance:

   Object
   |
   +--DisplayObject
      |
      +--BarChart3DWidget::Bar

Package:

stx:libwidg3

Category:

Views-Graphs

Owner:

BarChart3DWidget

Author:

Martin Walser (martin@vercingetorix)

Description:

One 3-dimensional-bar of a bar-chart-view.


[instance variables:]
    color                Color
    origin               Like with rectangle the most top left point 
                         of the maximum bar, not of the real bar.
    corner               Like with rectangle the most bottom right point.
    percentageHeight     The 'value' of the bar, a value inbetwen 0,0 and 1.0
    depthVector          Depth of the bar as vector.

[class variables:]

Related information:

Class protocol:

 defaultColorsAt: aNumber

Return a color for a number.
Use three different colors and alternate them for bigger numbers.
Caller gets always a usable bar-color.

 defaultDepthsVector

Return a vector for the depths.
Holding direction and length of the depths of a bar.

 defaultExtent

Return the default extent of a display bar.

 for: aValue on: aBarChartView at: aPosition

Build a display bar on a view.

Instance protocol:

 corner

Return the corner.

 origin

Return the origin of this bar.
It is the origin of the maximum bar.

 drawIn: aDrawable offset: anOffset

Display yourself in a drawable.
Draws three sides of three dimensional bar.

 computeBoundingBox

Return the bounding box of the drawn real display bar.
As a side effect, leave the value in the frame variable.
You can see this box if you enable some line in the draw method.

 computeMaxBoundingBox

Return the bounding box of the total potential display bar.
You can see this box if you enable some line in the draw method.

 color

Return the color.
If no color set, use first of defaults.

 percentageHeight

Return the percentage height of the bar.
Default is to be 100% = 1.0

 for: aValue on: aBarChartView at: aPosition

Build a display bar.
Private - use only for instance creation.