B4J Library [B4X] [XUI] xChartLite b4xlib

Current version : 1.4

xChartLite is a b4xlib library, it is a lite version of the xChart library.

It has automatic scales, automatic text size according to the chart size.
These can also be set manually.

I am convinced that many user do not need all kind of different possible charts and settings.
The size of the code is almost one third of the full version.

Supported charts:
- Pie
- Bar
- Stacked bar
- Lines

The demo project is a B4XPages project using the xChartLite library.
Tested on PC, Android Samsung S10, Samsung Tab S2, iPhone 8 and iPad.
xChartDemoV1_4.zip B4XPages cross platform project using the xChartLite library, you need to copy the xChartLite.b4xlib file into your AdditionalLibraries\B4X folder.
xChartLite.b4xlib The xChartLite B4X library file. You must copy it into your your AdditionalLibraries\B4X folder.
xChartLite.xml Help file, it is useful with the B4X Help Viewer or the B4XObjectBrowser.
Don’t copy the xChartLite.xml file to the AdditionalLibraries folder!


1651145277873.gif


EDIT: 2022.06.01 Version 1.3
Added the DisplayValuesOnHover property: Show values when hovering with the cursor over a chart; valid only for B4J.
Added AxisTextColor property

V1.2 Amended problem with min bar width for STACKED_BAR charts.
V1.1 Added PieStartAngle, PiePercentageNbFractions, PieAddPercentage and ValuesBackground properties
Only the xChartLite.b4xlib the xChartLite.xml files have been updated.

xChartLite

Author: Klaus CHRISTL (klaus)
Version: 1.4

  • xChartLite
    • Events:
      • CursorTouch (Action As Int, CursorPointIndex As Int)
        Action, same as the Panel Touch event.
        CursorPointIndex, is the index of the point at the current cursor position.
    • Fields:
      • mBase As B4XView
      • Items As List
        Items are Bars, Lines etc.
      • Points As List
        Points contain the point coordinates.
    • Methods:
      • AddBar (Name As String, BarColor As Int) As String
        adds a bar
        only for Bar and StackedBar charts !
      • AddBarMultiplePoint (X As String, YArray As Double())
        adds multibar points data
        only for Bar and StackedBar charts !
      • AddBarPointData (X As String, Y As Double) As String)
        adds single bar point data
        only for Bar charts !
      • AddLine (Name As String, LineColor As Int)
        adds a line
        only for Line charts !
      • AddLine2 (Name As String, LineColor As Int, StrokeWidth As Int, PointType As String, PointFilled As Boolean, PointColor As Int) As String
        adds a line
        StrokeWidth = line thickness
        PointType, possible values: "NONE", "CIRCLE", "SQUARE", "TRIANGLE", "RHOMBUS", "CROSS+", "CROSSX"
        only for Line charts !
      • AddLineMultiplePoints (X As String, YArray As Double(), ShowTick As Boolean) As String
        adds multiline points data
        ShowTick = True displays the x value in the X axis
        only for Line charts !
      • AddLinePointData (X As String, Y As Double, ShowTick As Boolean)
        adds single line point data
        ShowTick = True displays the x value in the X axis
        only for Line charts !
      • AddPie (Name As String, Value As Float, Color As Int) As String
        Adds a pie slice item
        Color: 0 = random color
        only for Pie charts !
      • Base_Resize (Width As Double, Height As Double)
        resizes the Chart with new Width and Height
      • ClearData
        clears all data, not the title nor axis names
      • ClearPoints
        clears all points, not the title nor axis names
      • DrawChart
        draws a chart
      • GetMaxNumberBars As Int
        Returns an Int
        gets the max number of displayable bars or group of bars
        this method can be called before DrawChart to determine the number max of displayable bars
        this can allow to adapt the filling routine according to the capacity of the chart
        .
      • Initialize (Callback As Object, EventName As String) As String
      • IsInitialized As Boolean
        Tests whether the object has been initialized.
      • JumpTo (Index As Int)
        Jumps to the given index when a chart is zoomed.
        does nothing when the chart is unzoomed.
      • NumberFormat3 (Number As Double, MaxDigits As Int) As String
        formats a number with scientific notation
        MaxDigits = number max of digits
        Examples: 1.23456 / 12.3456 / 1234.56 / 123456 / 1.23E10
      • RemovePointData (Index As Int) As String
        removes the data of the point with the given index
      • SetBarMeanValueFormat (MinimumIntegers As Int, MaximumFractions As Int, MinimumFractions As Int, GroupingUsed As Boolean)
        sets a custom numberformat for the bar mean line value, values like NumberFormat2
        if set, it overides the default format
        to go back to the default format, comment the line defining the custom number format
    • Properties:
      • AutomaticScale As Boolean
        gets or sets the AutomaticScale property
        if True, the scales are automatically calculated to fill the chart, with 1, 2, 2.5, 5 standardized scales
      • AutomaticTextSizes As Boolean
        gets or sets the AutomaticTextSizes property
        if True, the text sizes are automatically calculated according to the chart size
      • AxisTextColor As Int
        gets or sets the AxisTextColor property
      • AxisTextSize As Float
        gets or sets the AxisTextSize property
        setting this text size sets automatically AutomaticTextSizes = False
      • BarValueOrientation As Boolean
        gets or sets the BarValueOrientation property
        Possible values: VERTICAL, HORIZONTAL
      • ChartBackgroundColor As Int
        sets the ChartBackgroundColor property
        the color must be an xui.Color
        Example code: <code>xChart1.ChartBackgroundColor = xui.Color_RGB(207, 220, 220)</code>
      • ChartType As String
        gets or sets the chart type
        Possible values: LINE, BAR, H_BAR, STACKED_BAR, H_STACKED_BAR, PIE, YX_CHART, RADAR
      • DifferentScales As Boolean
        gets or sets the DifferentScales property, only for LINE and YX_CHART charts.
        when True, displays the lines with different automatic scales for two up to four lines.
        if the number of lines is smaller than 2 and bigger than 4, then all lines have the same scale.
      • DisplayValues As Boolean
        gets or sets the DisplayValues property
        if True, displays the item values when moving the finger or the cursor on the chart.
      • DisplayValuesOnHover As Boolean
        gets or sets the DisplayValuesOnHover property
        if True, displays the item values when hovering with the cursor over a chart; valid only for B4J.
      • DrawXScale As Boolean
        gets or sets the DrawXScale property
        True by default, if False doesn't draw the X scale values
        not drawing the scale can be useful for small charts
        not for logarithmic scales
      • DrawYScale As Boolean
        gets or sets the DrawYScale property
        True by default, if False doesn't draw the Y scale values
        not drawing the scale can be useful for small charts
        not for logarithmic scales
      • GradientColors As Boolean
        gets or sets the GradientColors property
      • GradientColorsAlpha As Int
        gets or sets the GradientColorsAlpha property
        values between 0 and 255
        setting this value, set automatically the GradientColors property to True
      • GridColor As Int
        sets the GridColor property
        the color must be an xui.Color
        Example code: <code>xChart1.GridColor = xui.Color_RGB(169, 169, 169)</code>
      • GridFrameColor As Int
        sets the GridFrameColor property
        the color must be an xui.Color
        Example code: <code>xChart1.GridFrameColor = xui.Color_Blue</code>
      • Height As Int
        gets or sets the Height property
      • IncludeBarMeanLine As Boolean
        gets or sets the IncludeBarMeanLine property
        possible only for single bar charts
      • IncludeLegend As String
        gets or sets the IncludeLegend property
        possible values: NONE, TOP_RIGHT, BOTTOM
      • IncludeValues As String
        gets or sets the IncludeValues property
        possible only for single bar charts or pie charts with TOP_RIGHT legend
      • Left As Int
        gets or sets the Left property
      • LegendBackgroundColor As Int
        sets the LegendBackgroundColor property
        the color must be an xui.Color
        Example code: xChart1.LegendBackgroundColor = xui.Color_ARGB(102, 255, 255, 255)
      • LegendTextColor As Int
        sets the LegendTextColor property
        the color must be an xui.Color
        Example code: xChart1.LegendTextColor = xui.Color_Black
      • LegendTextSize As Float
        gets or sets the LegendTextSize property
        setting this text size sets automatically AutomaticTextSizes = False
      • NbPoints As Int [read only]
        gets the number of points (read only)
      • NbYIntervals As Int
        gets or sets the NbYIntervals property, number of Y axis intervals
        should be an even number, otherwise the 0 scale value might not be displayed
      • PiePercentageNbFractions As Int
        gets or sets the number of fractions for pie percentage values
        min = 0 max = 2
      • PieStartAngle As Int
        gets or sets the PieStartAngle property
        default value = 0 (three o'clock), positive clockwise
        twelve o'clock = -90
      • ScaleTextColor As Int
        sets the ScaleTextColor property
        the color must be an xui.Color
        Example code: <code>xChart1.ScaleTextColor = xui.Color_Blue</code>
      • ScaleTextSize As Float
        gets or sets the ScaleTextSize property
        setting this text size sets automatically AutomaticTextSizes = False
      • ScaleValues As String
        gets or sets the ScaleValues property
        it is a string with the different scale values separated by the exclamation mark.
        it must begin with 1! and end with !10
        Example: the default property 1!2!2.5!5!10
      • Snapshot As B4XBitmap [read only]
        returns a B4XBitmap object of the chart (read only)
      • Subtitle As String
        gets or sets the Subtitle property
      • SubtitleTextColor As Int
        gets or sets the SubtitleTextColor property
        the color must be an xui.Color
        Example code: <code>xChart1.SubitleTextColor = xui.Color_Black</code>
      • SubtitleTextSize As Float
        gets or sets the SubtitleTextSize property
        setting this text size sets automatically AutomaticTextSizes = False
      • Title As String
        gets or sets the Chart title
      • TitleTextColor As Int
        sets the TitleTextColor property
        the color must be an xui.Color
        Example code: <code>xChart1.TitleTextColor = xui.Color_Black</code>
      • TitleTextSize As Float
        gets or sets the TitleTextSize property
        setting this text size sets automatically AutomaticTextSizes = False
      • Top As Int
        gets or sets the Top property
      • ValuesBackgroundColor As Int
        sets the ValuesBackgroundColor property
        the color must be an xui.Color
        Example code: <code>xChart1.ValuesBackgroundColor = xui.Color_Black</code>
      • ValuesTextColor As Int
        sets the ValuesTextColor property
        the color must be an xui.Color
        Example code: <code>xChart1.ValuesTextColor = xui.Color_Black</code>
      • ValuesTextSize As Float
        gets or sets the ValuesTextSize property
        setting this text size sets automatically AutomaticTextSizes = False
      • Visible As Boolean
        gets or sets the Visible property
      • Width As Int
        gets or sets the Width property
      • XAxisName As String
        gets or sets the X axis name
      • XScaleTextOrientation As String
        gets or sets the X scale text orientation
        Possible values: VERTICAL, HORIZONTAL, 45 DEGREES
      • YAxisName As String
        gets or sets the Y axis name
      • YScaleMaxValue As Double
        gets or sets the Y scale max value
        works only with AutomaticScale = False
        setting XScaleMaxValue sets automatically AutomaticScale = False
      • YScaleMinValue As Double
        gets or sets the Y scale min value
        works only with AutomaticScale = False
        setting XScaleMaxValue sets automatically AutomaticScale = False
      • YZeroAxis As Boolean
        gets or sets the YZeroAxis property for LINE charts
        if all values are positives, sets the lower Y scale to zero
        if all values are negatives, sets the upper Y scale to zero
 

Attachments

  • xChartLite.b4xlib
    19.5 KB · Views: 12
  • xChartLiteDemoV1_4.zip
    41.4 KB · Views: 8
  • xChartLite.xml
    28.3 KB · Views: 9
Last edited:

Peter Simpson

Expert
Licensed User
Longtime User
Hello Klaus,
Current version : 1.0

xChartLite is a b4xlib library, it is a lite version of the xChart library.
Now that's a good idea

Current version : 1.0
I am convinced that many user do not need all kind of different possible charts and settings.
I second and third that opinion 👍


Peter...
 

klaus

Expert
Licensed User
Longtime User
The xChartLite libary has been updated to Version 1.2
V1.2 Amended problem with min bar width for STACKED_BAR charts.
V1.1 Added PieStartAngle, PiePercentageNbFractions, PieAddPercentage and ValuesBackground properties
Only the xChartLite.b4xlib the xChartLite.xml files have been updated.
 

Chris2

Active Member
Licensed User
Many thanks for fixing the STACKED_BAR issue, @klaus !
The b4xlib is no longer available to download though. Only the demo project, bas file, & xml file are available on your first post now...
Attachments.png
 
Last edited:

Laurent95

Active Member
Licensed User
Longtime User
Hello

@klaus
Fantastic work as usual, thank you. It's 😎 for small projects.
Not really present, for now i try to finish to retrieve all my software under Windows, or their equivalents, under Linux

Best regards,
Laurent
 

Tecuma

Member
Licensed User
Hello Community

@klaus
Many thanks for this wonderfull work.

A stupid question. I am checking the demo project to learn how to use this library. Is it not necessary to declare / generate the used buttons?
In my projects I use

B4X:
Private btnCancel As B4XView

In the example project I do not see this. I can see the btn names in the layout / designer.
 

klaus

Expert
Licensed User
Longtime User
If you have only events for a given object you do not need to declare them.
You need to declare then when you want to access any property of the object.

In your case, if you have only:
B4X:
Private Sub btnCancel_Click
No no need to declare it.

But if you want to use for example:
B4X:
btnCancel.Text = "Cancel chart" As B4XView
You need to declare it.
 

Tecuma

Member
Licensed User
I have integrated the xChartLite library into my project and implemented the first code to draw a chart.
When I try to run it I got an error message.

B4X:
B4J Version: 9.30
Parsing code.    Error
Error parsing program.
Error description: Unknown type: argbcolor
Are you missing a library reference?
Error occurred on line: 1656 (xChartLite)
Private ARGB As ARGBColor

When I run the example project I do not get this error.

I have configured the path for additional libraries like in the example project.
I had added the bas file via existing module and selected copy to the parent folder.

What did I miss to integrate or made wrong?
 

klaus

Expert
Licensed User
Longtime User
The xChartLite custom view needs the BitmapCreator library,
When you use the xChartLite.bas module, you need to select it the in the Library Manager Tab.
But, it would be better to use the xChartLite.b4xlib instead, and in this case, the BitmapCreator library is automatically selected.
 

Tecuma

Member
Licensed User
I have selected the xChartLite library from the Library Manager and deleted the bas module from the project folder.
How can I tell the IDE that I do not want to use the bas module anymore?
In the logs I can see that it still want to have the bas module.
 

Tecuma

Member
Licensed User
Error with bas module is gone. I had to clean the project. I had reloaded the project 2 times and run it 1 time.
 

klaus

Expert
Licensed User
Longtime User
The xChartLite libary has been updated to Version 1.3
Added the DisplayValuesOnHover property: Show values when hovering with the cursor over a chart; valid only for B4J.
Added AxisTextColor property
Only the xChartLite.b4xlib, xChartLite.xml and the xChartLite.bas files have been updated.
 
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