private void ShowRendererParamsUI(string stretchType)
{
if (_updateRendererUI != null)
{
return;
}
// Create a view to show map item info entry controls over the map view
var ovBounds = new CoreGraphics.CGRect(0, 60, View.Bounds.Width, View.Bounds.Height);
_updateRendererUI = new UpdateRendererDialogOverlay(ovBounds, 0.75f, UIColor.White, stretchType);
// Handle the OnSearchMapsTextEntered event to get the info entered by the user
_updateRendererUI.OnStretchInputsEntered += UpdateRenderer;
// Handle the cancel event when the user closes the dialog without choosing to search
_updateRendererUI.OnCanceled += (s, e) =>
{
// Remove the search input UI
_updateRendererUI.Hide();
_updateRendererUI = null;
};
// Add the search UI view (will display semi-transparent over the map view)
View.Add(_updateRendererUI);
}
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;
}