public static int ColorPick(this NuklearContext ctx, Colorf *color, int fmt)
{
nk_window win;
nk_panel layout;
nk_style config;
nk_input _in_;
int state;
var bounds = new RectangleF();
if (ctx == null || ctx.current == null || ctx.current.Layout == null || color == null)
{
return(0);
}
win = ctx.current;
config = ctx.style;
layout = win.Layout;
state = ctx.Widget(ref bounds);
if (state == 0)
{
return(0);
}
_in_ = state == NK_WIDGET_ROM || (layout.Flags & NK_WINDOW_ROM) != 0 ? null : ctx.input;
return
(nk_do_color_picker(ref ctx.last_widget_state, win.Buffer, color, fmt, bounds,
new Vector2(0, 0), _in_, config.font));
}
public static int nk_do_color_picker(ref uint state, CommandBuffer _out_, Colorf *col, int fmt,
RectangleF bounds, Vector2 padding, nk_input _in_, nk_font font)
{
var ret = 0;
var matrix = new RectangleF();
var hue_bar = new RectangleF();
var alpha_bar = new RectangleF();
float bar_w;
if (_out_ == null || col == null || font == null)
{
return(ret);
}
bar_w = font.Size;
bounds.X += padding.X;
bounds.Y += padding.X;
bounds.Width -= 2 * padding.X;
bounds.Height -= 2 * padding.Y;
matrix.X = bounds.X;
matrix.Y = bounds.Y;
matrix.Height = bounds.Height;
matrix.Width = bounds.Width - (3 * padding.X + 2 * bar_w);
hue_bar.Width = bar_w;
hue_bar.Y = bounds.Y;
hue_bar.Height = matrix.Height;
hue_bar.X = matrix.X + matrix.Width + padding.X;
alpha_bar.X = hue_bar.X + hue_bar.Width + padding.X;
alpha_bar.Y = bounds.Y;
alpha_bar.Width = bar_w;
alpha_bar.Height = matrix.Height;
ret =
ColorPickerBehavior(ref state, &bounds, &matrix, &hue_bar, fmt == NK_RGBA ? &alpha_bar : null, col,
_in_);
_out_.DrawColorPicker(&matrix, &hue_bar, fmt == NK_RGBA ? &alpha_bar : null, *col);
return(ret);
}
public static int ColorPickerBehavior(ref uint state, RectangleF *bounds, RectangleF *matrix,
RectangleF *hue_bar,
RectangleF *alpha_bar, Colorf *color, nk_input _in_)
{
var hsva = stackalloc float[4];
var value_changed = 0;
var hsv_changed = 0;
Colorf_hsva_fv(hsva, *color);
if (ButtonBehavior(ref state, *matrix, _in_, NK_BUTTON_REPEATER))
{
hsva[1] =
0 <
(1.0f < (_in_.mouse.pos.X - matrix->X) / (matrix->Width - 1)
? 1.0f
: (_in_.mouse.pos.X - matrix->X) / (matrix->Width - 1))
? 1.0f < (_in_.mouse.pos.X - matrix->X) / (matrix->Width - 1)
? 1.0f
: (_in_.mouse.pos.X - matrix->X) / (matrix->Width - 1)
: 0;
hsva[2] =
1.0f -
(0 <
(1.0f < (_in_.mouse.pos.Y - matrix->Y) / (matrix->Height - 1)
? 1.0f
: (_in_.mouse.pos.Y - matrix->Y) / (matrix->Height - 1))
? 1.0f < (_in_.mouse.pos.Y - matrix->Y) / (matrix->Height - 1)
? 1.0f
: (_in_.mouse.pos.Y - matrix->Y) / (matrix->Height - 1)
: 0);
value_changed = hsv_changed = 1;
}
if (ButtonBehavior(ref state, *hue_bar, _in_, NK_BUTTON_REPEATER))
{
hsva[0] =
0 <
(1.0f < (_in_.mouse.pos.Y - hue_bar->Y) / (hue_bar->Height - 1)
? 1.0f
: (_in_.mouse.pos.Y - hue_bar->Y) / (hue_bar->Height - 1))
? 1.0f < (_in_.mouse.pos.Y - hue_bar->Y) / (hue_bar->Height - 1)
? 1.0f
: (_in_.mouse.pos.Y - hue_bar->Y) / (hue_bar->Height - 1)
: 0;
value_changed = hsv_changed = 1;
}
if (alpha_bar != null)
{
if (ButtonBehavior(ref state, *alpha_bar, _in_, NK_BUTTON_REPEATER))
{
hsva[3] =
1.0f -
(0 <
(1.0f < (_in_.mouse.pos.Y - alpha_bar->Y) / (alpha_bar->Height - 1)
? 1.0f
: (_in_.mouse.pos.Y - alpha_bar->Y) / (alpha_bar->Height - 1))
? 1.0f < (_in_.mouse.pos.Y - alpha_bar->Y) / (alpha_bar->Height - 1)
? 1.0f
: (_in_.mouse.pos.Y - alpha_bar->Y) / (alpha_bar->Height - 1)
: 0);
value_changed = 1;
}
}
if ((state & NK_WIDGET_STATE_MODIFIED) != 0)
{
state = NK_WIDGET_STATE_INACTIVE | NK_WIDGET_STATE_MODIFIED;
}
else
{
state = NK_WIDGET_STATE_INACTIVE;
}
if (hsv_changed != 0)
{
*color = nk_hsva_colorfv(hsva);
state = NK_WIDGET_STATE_ACTIVE;
}
if (value_changed != 0)
{
color->A = hsva[3];
state = NK_WIDGET_STATE_ACTIVE;
}
if (nk_input_is_mouse_hovering_rect(_in_, *bounds))
{
state = NK_WIDGET_STATE_HOVERED;
}
if ((state & NK_WIDGET_STATE_HOVER) != 0 && !nk_input_is_mouse_prev_hovering_rect(_in_, *bounds))
{
state |= NK_WIDGET_STATE_ENTERED;
}
else if (nk_input_is_mouse_prev_hovering_rect(_in_, *bounds))
{
state |= NK_WIDGET_STATE_LEFT;
}
return(value_changed);
}
