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Class: PieChartWidget


Inheritance:

   Object
   |
   +--GraphicsMedium
      |
      +--DisplaySurface
         |
         +--SimpleView
            |
            +--View
               |
               +--PieChartWidget

Package:
stx:libwidg3
Category:
Views-Misc
Version:
rev: 1.20 date: 2017/11/28 18:27:44
user: cg
file: PieChartWidget.st directory: libwidg3
module: stx stc-classLibrary: libwidg3
Author:
Timo Merkert (tm@idefix)

Description:


This is a demo widget programmed as a learning experience...

hallo erstmal...

a simple PieChart,
(zeigt ein Tortendiagramm, wobei die Stücke jedoch nicht essbar sind.)

The model is a collection of chart description items,
each being a dictionary filled with entries for:
    #value  aNumber         the numeric value
    #color  aColor          the color

see example on how to fill such a chartDescription model.



[instance variables:]
middlePoint,        only for the point in the middle => therefore middlepoint
radX                radian for x-coordinate
radY                radian for y-coordinate
anzahl              number of pie-pieces
summe               result of all values
aod                 Array of Dictionaries
aoHilf              Array with help coordinates
foregroundColor     text color for percent displaying
backgroundColor     background color of pie chart
label1              name of pie chart


Related information:

    BarChartWidget
    ChartDescription

Instance protocol:

accessing
o  anzahl
return the value of the instance variable 'anzahl' (automatically generated)

o  anzahl: something
set the value of the instance variable 'anzahl' (automatically generated)

o  aoHilf
return the value of the instance variable 'aoHilf' (automatically generated)

o  aoHilf: something
set the value of the instance variable 'aoHilf' (automatically generated)

o  aod
return the value of the instance variable 'aod' (automatically generated)

o  aod: something
set the value of the instance variable 'aod' (automatically generated)

o  label

o  label: aString

o  middlePoint
return the value of the instance variable 'middlePoint' (automatically generated)

o  middlePoint: aPoint
set the value of the instance variable 'middlePoint' (automatically generated)

o  model: newModel

o  newfont
return the value of the instance variable 'newfont' (automatically generated)

o  newfont: something
set the value of the instance variable 'newfont' (automatically generated)

o  oldfont
return the value of the instance variable 'oldfont' (automatically generated)

o  oldfont: something
set the value of the instance variable 'oldfont' (automatically generated)

o  pieChartName
return the value of the instance variable 'pieChartName' (automatically generated)

o  pieChartName: something
set the value of the instance variable 'pieChartName' (automatically generated)

o  rF
return the value of the instance variable 'rF' (automatically generated)

o  rF: something
set the value of the instance variable 'rF' (automatically generated)

o  radX
return the value of the instance variable 'radX' (automatically generated)

o  radX: something
set the value of the instance variable 'radX' (automatically generated)

o  radY
return the value of the instance variable 'radY' (automatically generated)

o  radY: something
set the value of the instance variable 'radY' (automatically generated)

o  style
return the value of the instance variable 'style' (automatically generated)

o  style: something
set the value of the instance variable 'style' (automatically generated)

o  summe
return the value of the instance variable 'summe' (automatically generated)

o  summe: something
set the value of the instance variable 'summe' (automatically generated)

accessing-color & font
o  backgroundColor
return the value of the instance variable 'backgroundColor' (automatically generated)

o  backgroundColor: something
set the value of the instance variable 'backgroundColor' (automatically generated)

o  foregroundColor
return the value of the instance variable 'foregroundColor' (automatically generated)

o  foregroundColor: something
set the value of the instance variable 'foregroundColor' (automatically generated)

change & update
o  delayedUpdateModel

o  update: something with: aParameter from: changedObject

drawing
o  drawLogo
put demo values into model

o  drawLogo2
zeichnet den pie-Umfang

o  drawPercentDescription
Prozentausgabe der Diagrammstücke

o  drawPieChart
get number of pieces

o  drawPiePieces
draw a filled arc in a box, given startAngle and endAngle.

o  redrawPieChart
compute spacing need for my used font.

o  writeLabel

event handling
o  redrawX: x y: y width: w height: h

o  sizeChanged: how

hooks
o  postBuildWith: aBuilder
automatically generated by UIPainter ...
usage example(s):
super postBuildWith:aBuilder

initialization
o  initialize
initialisierung und sein Kind
usage example(s):
      self initialize

private
o  fillAod
fills the Dictionaries in Array with Values

o  getAnzahl
ermittelt die Anzahl der belegten Diagrammstücke

o  getSumme
initialisiert die Instanzvariable summe mit der Gesammtsumme

views
o  getPieChartWidget


Examples:


        |p chart piece holder|

        chart := OrderedCollection new.
        piece := Dictionary new.
        piece at:#value put:50.
        piece at:#color put:Color red.
        chart add:piece.

        piece := Dictionary new.
        piece at:#value put:100.
        piece at:#color put:Color blue.
        chart add:piece.

        p := PieChartWidget new.
        p model:(holder := ValueHolder new).
        p extent:300@300.
        p pieChartName:'demo PieChart'.
        p open.
        holder value:chart.
        Delay waitForSeconds:2.

        1 to: 5 do:[:i |
            piece := Dictionary new.
            piece at:#value put:30.

            piece at:#color put:(i odd ifTrue:[Color green] 
                                       ifFalse:[Color magenta]).
            chart add:piece.

            holder value:nil.
            holder value:chart.
        ]


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