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//
// HueSelector.cs
//
// Author:
// Jean-Philippe Bruyère <jp.bruyere@hotmail.com>
//
// Copyright (c) 2016 jp
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
using System;
using System.Xml.Serialization;
using System.ComponentModel;
using Cairo;
namespace Crow
{
public class HueSelector : ColorSelector
{
public HueSelector () : base()
{
}
Orientation _orientation;
double hue;
[XmlAttributeAttribute][DefaultValue(Orientation.Horizontal)]
public virtual Orientation Orientation
{
get { return _orientation; }
set {
if (_orientation == value)
return;
_orientation = value;
NotifyValueChanged ("Orientation", _orientation);
RegisterForGraphicUpdate ();
}
}
[XmlAttributeAttribute()]
public virtual double Hue {
get { return hue; }
set {
if (hue == value)
return;
hue = value;
notifyHueChanged ();
updateMousePosFromHue ();
}
}
protected override void onDraw (Cairo.Context gr)
{
base.onDraw (gr);
Rectangle r = ClientRectangle;
Gradient.Type gt = Gradient.Type.Horizontal;
if (Orientation == Orientation.Vertical)
gt = Gradient.Type.Vertical;
Crow.Gradient grad = new Gradient (gt);
grad.Stops.Add (new Gradient.ColorStop (0, new Color (1, 0, 0, 1)));
grad.Stops.Add (new Gradient.ColorStop (0.167, new Color (1, 1, 0, 1)));
grad.Stops.Add (new Gradient.ColorStop (0.333, new Color (0, 1, 0, 1)));
grad.Stops.Add (new Gradient.ColorStop (0.5, new Color (0, 1, 1, 1)));
grad.Stops.Add (new Gradient.ColorStop (0.667, new Color (0, 0, 1, 1)));
grad.Stops.Add (new Gradient.ColorStop (0.833, new Color (1, 0, 1, 1)));
grad.Stops.Add (new Gradient.ColorStop (1, new Color (1, 0, 0, 1)));
grad.SetAsSource (gr, r);
CairoHelpers.CairoRectangle (gr, r, CornerRadius);
gr.Fill();
}
public override void Paint (ref Context ctx)
{
base.Paint (ref ctx);
Rectangle rb = Slot + Parent.ClientRectangle.Position;
ctx.Save ();
ctx.Translate (rb.X, rb.Y);
ctx.SetSourceColor (Color.White);
Rectangle r = ClientRectangle;
if (Orientation == Orientation.Horizontal) {
r.Width = 5;
r.X = mousePos.X;
} else {
r.Height = 5;
r.Y = mousePos.Y;
}
CairoHelpers.CairoRectangle (ctx, r, 2);
ctx.SetSourceColor (Color.White);
ctx.LineWidth = 2.0;
ctx.Stroke();
ctx.Restore ();
}
public override void OnLayoutChanges (LayoutingType layoutType)
{
base.OnLayoutChanges (layoutType);
if (Orientation == Orientation.Horizontal) {
if (layoutType == LayoutingType.Width)
updateMousePosFromHue ();
} else if (layoutType == LayoutingType.Height)
updateMousePosFromHue ();
}
protected override void updateMouseLocalPos (Point mPos)
{
base.updateMouseLocalPos (mPos);
if (Orientation == Orientation.Horizontal)
hue = (double)mousePos.X / (double)ClientRectangle.Width;
else
hue = (double)mousePos.Y / (double)ClientRectangle.Height;
notifyHueChanged ();
}
void updateMousePosFromHue(){
if (Orientation == Orientation.Horizontal)
mousePos.X = (int)Math.Floor(hue * (double)ClientRectangle.Width);
else
mousePos.Y = (int)Math.Floor(hue * (double)ClientRectangle.Height);
CurrentInterface.EnqueueForRepaint (this);
}
void notifyHueChanged(){
NotifyValueChanged ("Hue", hue);
NotifyValueChanged ("HueColor", new SolidColor (Color.FromHSV (hue)));
}
}
}
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