<Chart>.Origin (Function)

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Prefix syntax

Origin

Presentation

Example

Marks on axes

Types of charts

Restoring the default values

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AutoRefreshCategoryLabel

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Zoom

Marks on axes
Types of charts
Restoring the default values

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See also

<Chart>.Origin (Function)

In french: <Graphe>.Origine

Modifies the start and end marks on one of the chart axes.

Remark: <Chart>.Origin is used to view a chart section by reducing the values displayed on the one of the axes.

Caution: A specific configuration is required to use this function in Linux. For more details, see The charts.

Example

// Modify the start and end marks on the vertical axis of "CHART_Chart" control
// The mark will go from 500 to 1000
// Restore the default values

// Initialize the window
gnYMin is int
gnYMax is int

// Button for modifying the mark
gnYMin = CHART_Chart..YAxisMin
gnYMax = CHART_Chart..YAxisMax
CHART_Chart.Origin(500, 1000, grYCoordinate)
CHART_Chart.Draw()

// Button for restoring the mark
CHART_Chart.Origin(gnYMin, gnYMax, grYCoordinate)
CHART_Chart.Draw()

Syntax

<Chart name>.grOrigin_object(<Minimum mark> [, <Maximum mark> [, <Type of axis>]])

<Chart name>: Control name

Name of the Chart control to use (in the window, page or report editor).
Only the interactive Chart controls are available.

<Minimum mark>: Real

Start mark on the specified axis.
This parameter can also correspond to a duration, a date, a time or a date-time.

<Maximum mark>: Optional real

End mark on the specified axis. If this parameter is not specified, <Maximum mark> corresponds to the maximum value of chart data.
This parameter can also correspond to a duration, a date, a time or a date-time.

<Type of axis>: Optional constant

Axis for which the marks must be modified:
grSecondaryYCoordinate Secondary Y-axis (vertical axis).
grXCoordinate
(default value) X-axis (horizontal axis).
grYCoordinate Y-axis (vertical axis).
grZCoordinate Z axis (Surface charts only).
This constant is not available.

Remarks

Marks on axes

X-axis (horizontal axis): <Maximum mark> and <Minimum mark> correspond to the maximum and minimum data values in the series displayed.
Y-axis (vertical axis): <Minimum mark> and <Maximum mark> correspond to the minimum and maximum data values.
Limits: 100 marks above and 100 marks below the X axis.
To modify the frequency of marks on the horizontal or vertical axis of a chart, use <Chart>.Interval.
The data defined by <Chart>.Origin will be taken into account during the next call to <Chart>.Draw.

Types of charts

The marks on axes have no effect on the Pie charts.

Restoring the default values

To restore the display of the chart before the origin was modified, the minimum and maximum values of axes must be saved. These values can be known via the following properties:


XAxisMax	The XAxisMax property gets the maximum value of the X-axis in a Chart control. This property can be used in the "Zoom" event of a Chart control to identify the section displayed.
XAxisMin	The XAxisMin property gets the minimum value of the X-axis in a Chart control. This property can be used in the "Zoom" event of a Chart control to identify the section displayed.
YAxisMax	The YAxisMax property gets the maximum value of the Y-axis in a Chart control. This property can be used in the "Zoom" event of a Chart control to identify the section displayed.
YAxisMin	The YAxisMin property gets the minimum value of the Y-axis in a Chart control.
ZAxisMax	The ZAxisMax property gets the maximum value of the Z-axis in a Chart control (Surface chart).
ZAxisMin	The ZAxisMin property gets the minimum value of the Z-axis in a Chart control (Surface chart).

Remark: <Chart>.Zoom can also be used to view a section of the chart. However, the final user can restore the initial configuration via the context menu of the chart ("Initial zoom").

Related Examples:

Unit examples (WINDEV): The Chart functions

[ + ] Using the main chart designer features of WINDEV:
- Create a Pie, Column or Line chart
- Define the display area of a chart
- Define the chart options (legend, percentage, ...)
- Draw a line on a chart

Component: wd280grf.dll