void OnCellClicked(object sender, RoutedEventArgs e)
{
HexagonButton cell = sender as HexagonButton;
SelectedColor = cell.NominalColor;
OnColorSelected();
}
HexagonButton GetCell()
{
var HexagonButton = new HexagonButton(this.UsesGradients);
HexagonButton.Click += new RoutedEventHandler(this.OnCellClicked);
this.SetBindings(HexagonButton);
return(HexagonButton);
}
void SetBindings(HexagonButton Cell)
{
Binding Binding = new Binding()
{
Path = new PropertyPath("UsesGradients"),
Source = this
};
BindingOperations.SetBinding(Cell, HexagonButton.UsesGradientsProperty, Binding);
Binding = new Binding()
{
Path = new PropertyPath("ItemStrokeThickness"),
Source = this
};
BindingOperations.SetBinding(Cell, HexagonButton.StrokeThicknessProperty, Binding);
}
/// <summary>
/// Initialize surrounding nodes; this method is recursive.
/// </summary>
void InitializeChildren(HexagonButton Parent, int generation)
{
if (generation > MaxGenerations)
{
return;
}
for (int i = 0; i < 6; ++i)
{
if (Parent.Neighbors[i] == null)
{
HexagonButton Cell = this.GetCell();
double dx = Canvas.GetLeft(Parent) + HexagonButton.Offset * Math.Cos(i * Math.PI / 3d);
double dy = Canvas.GetTop(Parent) + HexagonButton.Offset * Math.Sin(i * Math.PI / 3d);
Canvas.SetLeft(Cell, dx);
Canvas.SetTop(Cell, dy);
PART_Canvas.Children.Add(Cell);
Parent.Neighbors[i] = Cell;
}
}
// Set the cross-pointers on the 6 surrounding nodes.
for (int i = 0; i < 6; ++i)
{
HexagonButton child = Parent.Neighbors[i];
if (child != null)
{
int ip3 = (i + 3) % 6;
child.Neighbors[ip3] = Parent;
int ip1 = (i + 1) % 6;
int ip2 = (i + 2) % 6;
int im1 = (i + 5) % 6;
int im2 = (i + 4) % 6;
child.Neighbors[ip2] = Parent.Neighbors[ip1];
child.Neighbors[im2] = Parent.Neighbors[im1];
}
}
// Recurse into each of the 6 surrounding nodes.
for (int i = 0; i < 6; ++i)
{
InitializeChildren(Parent.Neighbors[i], generation + 1);
}
}
/// <summary>
/// Initialize children.
/// </summary>
async void InitializeChildren()
{
this.SetSize();
await Application.Current.Dispatcher.BeginInvoke(System.Windows.Threading.DispatcherPriority.Background, new Action(() =>
{
PART_Canvas.Children.Clear();
//Define comb of 127 hexagons, starting in center of canvas.
PART_RootCell = this.GetCell();
Canvas.SetLeft(PART_RootCell, PART_Canvas.Width / 2);
Canvas.SetTop(PART_RootCell, PART_Canvas.Height / 2);
PART_Canvas.Children.Add(PART_RootCell);
//Expand outward
InitializeChildren(PART_RootCell, 1);
CascadeChildColors();
this.TotalChildren = this.PART_Canvas.Children.Count;
}));
}
/// <summary>
/// Cascase children with color; this method is recursive.
/// </summary>
/// <param name="parent"></param>
void CascadeChildColors(HexagonButton parent)
{
float delta = 1f / MaxGenerations;
float ceiling = 0.99f;
System.Collections.Generic.List <HexagonButton> visitedNodes =
new System.Collections.Generic.List <HexagonButton>(6);
for (int i = 0; i < 6; ++i)
{
HexagonButton child = parent.Neighbors[i];
if (child != null && !child.Visited)
{
Color c = parent.NominalColor;
switch (i)
{
case 0: // increase cyan; else reduce red
if (c.ScG < ceiling && c.ScB < ceiling)
{
c.ScG = Math.Min(Math.Max(0f, c.ScG + delta), 1f);
c.ScB = Math.Min(Math.Max(0f, c.ScB + delta), 1f);
}
else
{
c.ScR = Math.Min(Math.Max(0f, c.ScR - delta), 1f);
}
break;
case 1: // increase blue; else reduce yellow
if (c.ScB < ceiling)
{
c.ScB = Math.Min(Math.Max(0f, c.ScB + delta), 1f);
}
else
{
c.ScR = Math.Min(Math.Max(0f, c.ScR - delta), 1f);
c.ScG = Math.Min(Math.Max(0f, c.ScG - delta), 1f);
}
break;
case 2: // increase magenta; else reduce green
if (c.ScR < ceiling && c.ScB < ceiling)
{
c.ScR = Math.Min(Math.Max(0f, c.ScR + delta), 1f);
c.ScB = Math.Min(Math.Max(0f, c.ScB + delta), 1f);
}
else
{
c.ScG = Math.Min(Math.Max(0f, c.ScG - delta), 1f);
}
break;
case 3: // increase red; else reduce cyan
if (c.ScR < ceiling)
{
c.ScR = Math.Min(Math.Max(0f, c.ScR + delta), 1f);
}
else
{
c.ScG = Math.Min(Math.Max(0f, c.ScG - delta), 1f);
c.ScB = Math.Min(Math.Max(0f, c.ScB - delta), 1f);
}
break;
case 4: // increase yellow; else reduce blue
if (c.ScR < ceiling && c.ScG < ceiling)
{
c.ScR = Math.Min(Math.Max(0f, c.ScR + delta), 1f);
c.ScG = Math.Min(Math.Max(0f, c.ScG + delta), 1f);
}
else
{
c.ScB = Math.Min(Math.Max(0f, c.ScB - delta), 1f);
}
break;
case 5: // increase green; else reduce magenta
if (c.ScG < ceiling)
{
c.ScG = Math.Min(Math.Max(0f, c.ScG + delta), 1f);
}
else
{
c.ScR = Math.Min(Math.Max(0f, c.ScR - delta), 1f);
c.ScB = Math.Min(Math.Max(0f, c.ScB - delta), 1f);
}
break;
}
child.NominalColor = c;
child.Visited = true;
visitedNodes.Add(child);
}
}
parent.Visited = true; // ensures root node not over-visited
foreach (HexagonButton child in visitedNodes)
{
CascadeChildColors(child);
}
}
static void OnUsesGradientsChanged(DependencyObject Object, DependencyPropertyChangedEventArgs e)
{
HexagonButton HexagonButton = (HexagonButton)Object;
HexagonButton.Background = HexagonButton.GetBackgroundGradient(0.5f);
}