Class: SimpleFunctionGraphView

• Inheritance
• Description
• Instance protocol
  • accessing
  • change & update
  • drawing
• Examples

Inheritance:

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

Package:

stx:libwidg3

Category:

Views-Misc

Version:

rev: 1.5 date: 2019/03/13 20:45:02

user: cg

file: SimpleFunctionGraphView.st directory: libwidg3

module: stx stc-classLibrary: libwidg3

Author:

Claus Gittinger

Description:

UNDER CONSTRUCTION

displays the graph of a function.
TODO: grid & scale drawing.

Instance protocol:

 displayModeHolder

return the value of the instance variable 'displayModeHolder' (automatically generated)

 displayModeHolder: something

set the value of the instance variable 'displayModeHolder' (automatically generated)

 function: aBlock

(comment from inherited method)
set the drawing function if it has changed.
The argument is one of:
#copy,#copyInverted,#xor,#and,#andReverse
#andInverted,#or,#orReverse,#orInverted
#invert,#clear,#set,#noop,#equiv,#nand
Notice: not all graphicMedia support all functions

 functionHolder

return the value of the instance variable 'functionHolder' (automatically generated)

 functionHolder: something

set the value of the instance variable 'functionHolder' (automatically generated)

 graphColorHolder

return the value of the instance variable 'graphColorHolder' (automatically generated)

 graphColorHolder: something

set the value of the instance variable 'graphColorHolder' (automatically generated)

 gridColorHolder

return the value of the instance variable 'gridColorHolder' (automatically generated)

 gridColorHolder: something

set the value of the instance variable 'gridColorHolder' (automatically generated)

 invalidColorHolder

return the value of the instance variable 'invalidColorHolder' (automatically generated)

 invalidColorHolder: something

set the value of the instance variable 'invalidColorHolder' (automatically generated)

 markInvalidHolder

return the value of the instance variable 'markInvalidHolder' (automatically generated)

 markInvalidHolder: something

set the value of the instance variable 'markInvalidHolder' (automatically generated)

 maxXHolder

return the value of the instance variable 'maxXHolder' (automatically generated)

 maxXHolder: something

set the value of the instance variable 'maxXHolder' (automatically generated)

 maxYHolder

return the value of the instance variable 'maxYHolder' (automatically generated)

 maxYHolder: something

set the value of the instance variable 'maxYHolder' (automatically generated)

 minXHolder

return the value of the instance variable 'minXHolder' (automatically generated)

 minXHolder: something

set the value of the instance variable 'minXHolder' (automatically generated)

 minYHolder

return the value of the instance variable 'minYHolder' (automatically generated)

 minYHolder: something

set the value of the instance variable 'minYHolder' (automatically generated)

 showGridHolder

return the value of the instance variable 'showGridHolder' (automatically generated)

 showGridHolder: something

set the value of the instance variable 'showGridHolder' (automatically generated)

 showUnitsXHolder

return the value of the instance variable 'showUnitsXHolder' (automatically generated)

 showUnitsXHolder: something

set the value of the instance variable 'showUnitsXHolder' (automatically generated)

 showUnitsYHolder

return the value of the instance variable 'showUnitsYHolder' (automatically generated)

 showUnitsYHolder: something

set the value of the instance variable 'showUnitsYHolder' (automatically generated)

 unitColorHolder

return the value of the instance variable 'unitColorHolder' (automatically generated)

 unitColorHolder: something

set the value of the instance variable 'unitColorHolder' (automatically generated)

 sizeChanged: how

(comment from inherited method)
tell subviews that I changed size.
How is either #smaller, #larger or nil, and is used to control the order,
in which subviews are notified (possibly reducing redraw activity)

 update: something with: someArgument from: changedObject

something changed - for now, do a full redraw

 chooseGrid

for every centimeter on the display ...

 computeGraph

compute the graph

 redrawX: x y: y width: w height: h

redraw the graph

 test: arg

redraw the graph

usage example(s):

self basicNew test:nil

Examples:

        |top graphView|

        top := StandardSystemView extent:300@300.
        graphView := SimpleFunctionGraphView origin:0.0@0.0 corner:1.0@1.0 in:top.

        graphView minXHolder:(-5 asValue).
        graphView maxXHolder:(5 asValue).
        graphView minYHolder:(-2 asValue).
        graphView maxYHolder:(2 asValue).

        graphView function:[:x | x sin].

        top open.

        |top graphView|

        top := StandardSystemView extent:300@300.
        graphView := SimpleFunctionGraphView origin:0.0@0.0 corner:1.0@1.0 in:top.

        graphView graphColorHolder:(Color white).
        graphView backgroundColor:Color black.
        graphView minXHolder:(-5 asValue).
        graphView maxXHolder:(5 asValue).
        graphView minYHolder:(-2 asValue).
        graphView maxYHolder:(2 asValue).

        graphView function:[:x | x sin].

        top open.

        |top graphView minX maxX|

        top := StandardSystemView extent:300@300.
        graphView := SimpleFunctionGraphView origin:0.0@0.0 corner:1.0@1.0 in:top.

        graphView graphColorHolder:(Color white).
        graphView backgroundColor:Color black.
        graphView minXHolder:(minX := -5 asValue).
        graphView maxXHolder:(maxX := 5 asValue).
        graphView minYHolder:(-2 asValue).
        graphView maxYHolder:(2 asValue).

        graphView function:[:x | x sin].

        top openAndWait.

        [
            [top realized] whileTrue:[
                Delay waitForSeconds:0.05.
                minX value:(minX value + 0.1).
                maxX value:(maxX value + 0.1).
            ]
        ] fork
                

        |top graphView functionList|

        functionList := OrderedCollection new.
        functionList add:[:x | x].
        functionList add:[:x | x * x].
        functionList add:[:x | x sqrt].
        functionList add:[:x | x sin].
        functionList add:[:x | x cos].
        functionList add:[:x | x tan].
        functionList add:[:x | x log].
        functionList add:[:x | 0].

        top := StandardSystemView extent:300@300.
        graphView := SimpleFunctionGraphView origin:0.0@0.0 corner:1.0@1.0 in:top.

        graphView graphColorHolder:(Color white).
        graphView backgroundColor:Color black.
        graphView minXHolder:(-5 asValue).
        graphView maxXHolder:(5 asValue).
        graphView minYHolder:(-2 asValue).
        graphView maxYHolder:(2 asValue).
        graphView displayModeHolder:(#lineMode asValue).

        graphView function:(functionList last).

        top openAndWait.

        [
            [top realized] whileTrue:[
                functionList do:[:funcBlock |
                    Delay waitForSeconds:1.
                    graphView displayModeHolder value:#dotMode.
                    Delay waitForSeconds:1.
                    graphView displayModeHolder value:#lineMode.
                    Delay waitForSeconds:1.
                    graphView displayModeHolder value:#dotMode.

                    Delay waitForSeconds:1.
                    graphView displayModeHolder value:#lineMode.
                    graphView functionHolder value:funcBlock.
                ]
            ]
        ] fork