// Could have been a dependency property that pieces of the UI bind to, but the interaction is complex enough
// to make this the easier route:
public void SetCurrentColor(HSVColor value)
{
this.currentColor = value;
Color rgbColor = ColorConverter.HSVToRGB(value);
this.ResetButton.IsEnabled = true;
this.PreviewTile.Fill = new SolidColorBrush(rgbColor);
// Only update the TextBox if this isn't being done in response to typing. That prevents
// text like "red" from changing to "#FF0000" and prevents the cursor from jumping to the beginning.
if (!keyPressed)
this.ColorTextBox.Text = value.ToString();
this.HueGradientStop.Color = ColorConverter.HSVToRGB(new HSVColor { A = 255, H = value.H, S = 1, V = 1 });
Canvas.SetLeft(this.HueThumb, (value.H / 360) * this.HueSlider.Width - this.HueThumb.Width / 2);
// Update AlphaSlider and AlphaThumb:
Color opaqueColor = rgbColor;
opaqueColor.A = 255;
Color transparentColor = rgbColor;
transparentColor.A = 0;
this.alphaGradientStop.Color = opaqueColor;
this.alphaGradientStop2.Color = transparentColor;
Canvas.SetLeft(this.AlphaThumb, ((double)value.A / 255) * this.AlphaSlider.Width - this.AlphaThumb.Width / 2);
// Update SaturationValueMap:
Point saturationValuePoint = new Point(value.S * this.SaturationValueMap.Width, value.V * this.SaturationValueMap.Height);
this.SelectionLineX1.X1 = this.SelectionLineX1.X2 = saturationValuePoint.X;
this.SelectionLineX2.X1 = this.SelectionLineX2.X2 = saturationValuePoint.X;
this.SelectionLineY1.Y1 = this.SelectionLineY1.Y2 = saturationValuePoint.Y;
this.SelectionLineY2.Y1 = this.SelectionLineY2.Y2 = saturationValuePoint.Y;
}
public static Color HSVToRGB(HSVColor hsvColor)
{
int hi = Convert.ToInt32(Math.Floor(hsvColor.H / 60)) % 6;
double f = hsvColor.H / 60 - Math.Floor(hsvColor.H / 60);
hsvColor.V = hsvColor.V * 255;
byte v = Convert.ToByte(hsvColor.V);
byte p = Convert.ToByte(hsvColor.V * (1 - hsvColor.S));
byte q = Convert.ToByte(hsvColor.V * (1 - f * hsvColor.S));
byte t = Convert.ToByte(hsvColor.V * (1 - (1 - f) * hsvColor.S));
if (hi == 0)
return Color.FromArgb(hsvColor.A, v, t, p);
else if (hi == 1)
return Color.FromArgb(hsvColor.A, q, v, p);
else if (hi == 2)
return Color.FromArgb(hsvColor.A, p, v, t);
else if (hi == 3)
return Color.FromArgb(hsvColor.A, p, q, v);
else if (hi == 4)
return Color.FromArgb(hsvColor.A, t, p, v);
else
return Color.FromArgb(hsvColor.A, v, p, q);
}
protected override void OnNavigatedTo(NavigationEventArgs e)
{
base.OnNavigatedTo(e);
if (this.State.ContainsKey("CurrentColor"))
{
SetCurrentColor((HSVColor)this.State["CurrentColor"]);
}
else if (NavigationContext.QueryString.ContainsKey("currentColor"))
{
Color color;
if (TryGetColorFromText("#" + NavigationContext.QueryString["currentColor"], out color))
SetCurrentColor(ColorConverter.RGBToHSV(color));
}
if (NavigationContext.QueryString.ContainsKey("defaultColor"))
{
Color color;
if (TryGetColorFromText("#" + NavigationContext.QueryString["defaultColor"], out color))
defaultColor = ColorConverter.RGBToHSV(color);
if (defaultColor == currentColor)
{
this.Focus(); // So focus doesn't go to TextBox and bring up keyboard
this.ResetButton.IsEnabled = false;
}
}
if (NavigationContext.QueryString.ContainsKey("settingName"))
settingName = NavigationContext.QueryString["settingName"];
if (NavigationContext.QueryString.ContainsKey("showOpacity"))
{
bool newValue = Convert.ToBoolean(NavigationContext.QueryString["showOpacity"]);
// Only do this if switching from showing to not showing, to guard against multiple navigations to this page
// (for example, from locking/unlocking the phone)
if (showOpacity && !newValue)
{
// Hide options for non-opaque colors
AlphaPanel.Visibility = Visibility.Collapsed;
TransparentPresetColor.Visibility = Visibility.Collapsed;
// Spread out remaining UI
Canvas.SetTop(ColorPresetsPanel, Canvas.GetTop(ColorPresetsPanel) + 14);
Canvas.SetTop(SaturationValuePanel, Canvas.GetTop(SaturationValuePanel) + 30);
Canvas.SetTop(HuePanel, Canvas.GetTop(HuePanel) + 50);
}
showOpacity = newValue;
}
}
