/// <summary>
/// Rebuilds color scheme for image layer represented by grid. Grid may be opened directly or using proxy image.
/// </summary>
public static void RebuildGridWithNewColorScheme(Image img, PredefinedColorScheme colors, ColoringType coloringType, int bandIndex, bool allowExternalColorScheme)
{
// generating new scheme
var grid = img.OpenAsGrid();
grid.OpenBand(bandIndex);
var scheme = grid.GenerateColorScheme(tkGridSchemeGeneration.gsgGradient, colors);
scheme.ApplyColoringType(coloringType);
if (img.IsGridProxy)
{
var extents = axMap1.Extents;
// we need to rebuild the proxy layer completely
axMap1.RemoveAllLayers();
// in fact it will be removed in grid.CreateProxy, but let's do it explicitly
if (!grid.RemoveImageProxy())
{
MessageBox.Show("Failed to remove image proxy");
}
else
{
grid.GlobalCallback = callback;
// first approach
grid.OpenBand(bandIndex);
// in fact map.AddLayer will make this call internally; but for understanding sake I add it here
var newProxy = grid.CreateImageProxy(scheme);
if (newProxy == null)
{
MessageBox.Show("Failed to create image proxy");
return;
}
grid.PreferedDisplayMode = tkGridProxyMode.gpmUseProxy;
axMap1.AddLayer(grid, true);
}
axMap1.Extents = extents;
}
else
{
// it's enough to set new color scheme
img.SourceGridBandIndex = bandIndex;
img.CustomColorScheme = scheme;
img.AllowGridRendering = allowExternalColorScheme ? tkGridRendering.grForceForAllFormats : tkGridRendering.grForGridsOnly;
axMap1.Redraw();
}
}
/// <summary>
/// Loads the values into the color scheme from pre-defined color scheme.
/// </summary>
/// <param name="LowValue">The lowest value in the grid. </param>
/// <param name="HighValue">The highes value in the grid. </param>
/// <param name="Preset">Optional. The pre-defined color scheme to be used. The default is
/// MapWinGIS.PredefinedColorScheme.SummerMountains. </param>
public void UsePredefined(double LowValue, double HighValue, PredefinedColorScheme Preset)
{
throw new NotImplementedException();
}
/// <summary>
/// Tries to retrieve any existing color scheme associated with grid or generates a new one if none is found.
/// </summary>
/// <param name="retrievalMethod">Colour scheme retrieval method.</param>
/// <param name="generateMethod">Colour scheme generation method</param>
/// <param name="Colors">Predefined set of colours to be mapped to grid values during generation process.</param>
/// <returns>Color scheme or null if both retrieval and generation failed.</returns>
/// \new491 Added in version 4.9.1
public GridColorScheme RetrieveOrGenerateColorScheme(tkGridSchemeRetrieval retrievalMethod, tkGridSchemeGeneration generateMethod,
PredefinedColorScheme Colors)
{
throw new NotImplementedException();
}
/// <summary>
/// Generates colour scheme for the grid.
/// </summary>
/// <param name="Method">Method of generation to be used.</param>
/// <param name="Colors">Predefined colour scheme to be mapped to the values of grid.</param>
/// <returns>Generated colour scheme or null if the operation failed.</returns>
/// \new491 Added in version 4.9.1
public GridColorScheme GenerateColorScheme(tkGridSchemeGeneration Method, PredefinedColorScheme Colors)
{
throw new NotImplementedException();
}
/// <summary>
/// Clears all the existing breaks and creates new set of breaks specified by predefined colour scheme.
/// </summary>
/// <remarks>The number of the newly added breaks depends on the colour scheme chosen, usually 2-3.</remarks>
public void SetColors4(PredefinedColorScheme Scheme)
{
throw new NotImplementedException();
}