private void InputStretchParamsButton_Click(object sender, EventArgs e)
{
// Fire the OnStretchInputsEntered event and provide the stretch parameter input.
if (OnStretchInputsEntered != null)
{
// Create a new StretchParametersEventArgs to contain the input values.
StretchParameters inputStretchParams = null;
// Create the right type of stretch parameters defined by the user.
switch (_stretchParamsType)
{
// - Minimum and maximum RGB values.
case "Min Max RGB":
// Get the models that contains the min/max red, green, and blue picker choices.
RgbValuePickerModel minRgbModel = _minRgbPicker.Model as RgbValuePickerModel;
RgbValuePickerModel maxRgbModel = _maxRgbPicker.Model as RgbValuePickerModel;
// Read min/max RGB values that were chosen.
double[] minValues = { minRgbModel.SelectedRed, minRgbModel.SelectedGreen, minRgbModel.SelectedBlue };
double[] maxValues = { maxRgbModel.SelectedRed, maxRgbModel.SelectedGreen, maxRgbModel.SelectedBlue };
// Create a new MinMaxStretchParameters object with the values.
inputStretchParams = new MinMaxStretchParameters(minValues, maxValues);
break;
// - Minimum and maximum percent clip values.
case "% Clip":
// Read min/max percent values that were chosen.
double minPercent = _minPercentSlider.Value;
double maxPercent = _maxPercentSlider.Value;
inputStretchParams = new PercentClipStretchParameters(minPercent, maxPercent);
break;
// Standard deviation factor.
case "Std Dev":
// Get the model that contains the standard deviation factor choices.
StdDevFactorPickerModel factorModel = _stdDevPicker.Model as StdDevFactorPickerModel;
// Get the selected factor.
double standardDevFactor = factorModel.SelectedFactor;
inputStretchParams = new StandardDeviationStretchParameters(standardDevFactor);
break;
}
// Create a new StretchParametersEventArgs and provide the stretch parameters.
StretchParametersEventArgs inputParamsEventArgs = new StretchParametersEventArgs(inputStretchParams);
// Raise the event with the custom arguments.
OnStretchInputsEntered(sender, inputParamsEventArgs);
}
}
private void UpdateRenderer(object sender, StretchParametersEventArgs e)
{
// Create an array to specify the raster bands (red, green, blue).
int[] bands = { 0, 1, 2 };
// Create the RgbRenderer with the stretch parameters passed in, then apply it to the raster layer.
RgbRenderer rasterRenderer = new RgbRenderer(e.StretchParams, bands, null, true);
_rasterLayer.Renderer = rasterRenderer;
// Remove the parameter input UI.
_updateRendererUI.Hide();
_updateRendererUI = null;
}