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- Marks on axes
- Types of charts
- Restoring the default values
- Managing the zoom
<Chart>.Zoom (Function) In french: <Graphe>.Zoom
Not available
Defines the zoom of a chart. Remark: This function is equivalent to <Chart>.Origin. However, <Chart>.Zoom allows the user to restore the initial zoom by using one of the following methods: - via the context menu of the chart ("Initial zoom").
- via the Ctrl + 0 keys.
- via a double tap on the chart.
CHART_MyChart.Zoom(5, 12, grXCoordinate) CHART_MyChart.Draw()
Syntax
<Chart control>.Zoom(<Minimum mark> [, <Maximum mark> [, <Axis>]])
<Chart control>: Control name Name of the Chart control to use (in the window editor). <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. <Axis>: Optional Integer 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). |
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>.Zoom 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 chart display before the zoom, the minimum and maximum values of axes must be used. 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). |
For example:
// Code used to zoom CHART_MyChart.Zoom(5, 12, grXCoordinate) CHART_MyChart.Draw()
// Code used to zoom out CHART_MyChart.Zoom(CHART_MyChart.XAxisMin, CHART_MyChart.XAxisMax, grXCoordinate) CHART_MyChart.Draw()
Managing the zoom <Chart>.Parameter is used to configure several options for zoom management in the Chart controls: - Managing scrollbars.
- Managing the zoom out.
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