public virtual void ReplacePrimaryColor(string name)
{
if (name == null)
{
throw new ArgumentNullException(nameof(name));
}
var swatch = new SwatchesProvider().Swatches.FirstOrDefault(
s => string.Compare(s.Name, name, StringComparison.InvariantCultureIgnoreCase) == 0);
if (swatch == null)
{
throw new ArgumentException($"No such swatch '{name}'", nameof(name));
}
ReplacePrimaryColor(swatch);
}
/// <summary>
/// Attempts to query the current palette configured in the application's resources.
/// </summary>
/// <returns></returns>
/// <exception cref="InvalidOperationException">Thrown if there is any ambiguouty regarding the palette. Provided
/// standard guidleines have been followed for palette configureation, this should not happen.</exception>
public Palette QueryPalette()
{
//it's not safe to to query for the included swatches, so we find the mid (or accent) colour,
//& cross match it with the entirety of all available hues to find the owning swatch.
//TODO could cache this statically
var swatchesProvider = new SwatchesProvider();
var swatchByPrimaryHueIndex = swatchesProvider
.Swatches
.SelectMany(s => s.PrimaryHues.Select(h => new { s, h }))
.ToDictionary(a => a.h.Color, a => a.s);
var swatchByAccentHueIndex = swatchesProvider
.Swatches
.Where(s => s.IsAccented)
.SelectMany(s => s.AccentHues.Select(h => new { s, h }))
.ToDictionary(a => a.h.Color, a => a.s);
var primaryMidBrush = GetBrush("PrimaryHueMidBrush");
var accentBrush = GetBrush("SecondaryAccentBrush");
Swatch primarySwatch;
if (!swatchByPrimaryHueIndex.TryGetValue(primaryMidBrush.Color, out primarySwatch))
{
throw new InvalidOperationException("PrimaryHueMidBrush is not from standard swatches");
}
Swatch accentSwatch;
if (!swatchByAccentHueIndex.TryGetValue(accentBrush.Color, out accentSwatch))
{
throw new InvalidOperationException("SecondaryAccentBrush is not from standard swatches");
}
var primaryLightBrush = GetBrush("PrimaryHueLightBrush");
var primaryDarkBrush = GetBrush("PrimaryHueDarkBrush");
var primaryLightHueIndex = GetHueIndex(primarySwatch, primaryLightBrush.Color, false);
var primaryMidHueIndex = GetHueIndex(primarySwatch, primaryMidBrush.Color, false);
var primaryDarkHueIndex = GetHueIndex(primarySwatch, primaryDarkBrush.Color, false);
var accentHueIndex = GetHueIndex(accentSwatch, accentBrush.Color, true);
return(new Palette(primarySwatch, accentSwatch, primaryLightHueIndex, primaryMidHueIndex, primaryDarkHueIndex, accentHueIndex));
}
public PaletteSelectorViewModel()
{
Swatches = new SwatchesProvider().Swatches;
}
