| vTrend | (Variant) specification which trends to zoom
-4 - only the active trend, see the TrendActive property.
"", -3 - all trends.
|
|---|---|
| nType | (Long) Type of setting the range
1 - vPar1/vPar2 are new values of the lower/upper viewer edge
10 - Decreasing the zoom range to half of the current length of the value axis with the preservation of the value position according to nFixed.
Set vPar1 and vPar2 to 0. 11 - Increasing the zoom range to double of the current length of the value axis with the preservation of the value position according to nFixed.
Set vPar1 and vPar2 to 0. 20 - Change of the zoom with the preservation of the value position according to nFixed.
There is the multiple of the value axis current length in vPar1, for example 2=increasing the range, 0.5=decreasing the range. Set vPar2 to 0. 21 - Change of the zoom with the preservation of the value position according to nFixed.
There is a new range in vPar1. Set vPar2 to 0. |
| nFixed | (Long) Specifies the fixed part while zooming
1 - Zoom with the preservation of the lower edge position
2 - Zoom with the preservation of the upper edge position
3 - Zoom with the preservation of the center position
4 - Zoom with the preservation of the cursor position |
| vPar1 | (Variant) New value of the lower edge or the multiple value - according to setting nType |
| vPar2 | (Variant) New value of the upper edge or the multiple value - according to setting nType |
var oTView = pMe.Items("../TrendView");
oTView.ZoomValue(-3, 1, 3, -10, 220);
oTView.Draw();
var oTView = pMe.Items("../TrendView");
oTView.ZoomValue(-3, 21, 3, 180, 0);
oTView.Draw();