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//
// Slider.cs
//
// Author:
// Jean-Philippe Bruyère <jp.bruyere@hotmail.com>
//
// Copyright (c) 2013-2017 Jean-Philippe Bruyère
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
using System;
using Cairo;
using System.Xml.Serialization;
using System.ComponentModel;
using System.Diagnostics;
namespace Crow
{
public class Slider : NumericControl
{
#region CTOR
public Slider() : base(){}
public Slider(Interface iface) : base(iface)
{}
// public Slider(double minimum, double maximum, double step)
// : base(minimum,maximum,step)
// {
// }
#endregion
#region implemented abstract members of TemplatedControl
protected override void loadTemplate (GraphicObject template = null)
{
}
#endregion
#region private fields
Rectangle cursor;
int _cursorSize;
Fill _cursorColor;
Orientation _orientation;
bool holdCursor = false;
#endregion
protected double unity;
#region Public properties
[XmlAttributeAttribute()][DefaultValue("vgradient|0:White|0,1:LightGray|0,9:LightGray|1:DimGray")]
public virtual Fill CursorColor {
get { return _cursorColor; }
set {
if (_cursorColor == value)
return;
_cursorColor = value;
RegisterForRedraw ();
NotifyValueChanged ("CursorColor", _cursorColor);
}
}
[XmlAttributeAttribute()][DefaultValue(20)]
public virtual int CursorSize {
get { return _cursorSize; }
set {
if (_cursorSize == value)
return;
_cursorSize = value;
RegisterForGraphicUpdate ();
NotifyValueChanged ("CursorSize", _cursorSize);
}
}
[XmlAttributeAttribute()][DefaultValue(Orientation.Horizontal)]
public virtual Orientation Orientation
{
get { return _orientation; }
set {
if (_orientation == value)
return;
_orientation = value;
RegisterForLayouting (LayoutingType.All);
NotifyValueChanged ("Orientation", _orientation);
}
}
#endregion
[XmlAttributeAttribute()][DefaultValue(10.0)]
public override double Maximum {
get { return base.Maximum; }
set {
if (value == base.Maximum)
return;
base.Maximum = value;
LargeIncrement = base.Maximum / 10.0;
SmallIncrement = LargeIncrement / 5.0;
}
}
#region GraphicObject Overrides
protected override void onDraw (Context gr)
{
base.onDraw (gr);
if (Maximum <= 0)
return;
computeCursorPosition ();
Rectangle r = ClientRectangle;
PointD pStart;
PointD pEnd;
if (_orientation == Orientation.Horizontal) {
pStart = r.TopLeft + new Point (_cursorSize / 2, r.Height / 2);
pEnd = r.TopRight + new Point (-_cursorSize / 2, r.Height / 2);
} else {
pStart = r.TopLeft + new Point (r.Width / 2, _cursorSize / 2);
pEnd = r.BottomLeft + new Point (r.Width / 2,- _cursorSize / 2);
}
DrawGraduations (gr, pStart,pEnd);
DrawCursor (gr, cursor);
}
#endregion
protected virtual void DrawGraduations(Context gr, PointD pStart, PointD pEnd)
{
Foreground.SetAsSource (gr);
gr.LineWidth = 1;
gr.MoveTo(pStart);
gr.LineTo(pEnd);
gr.Stroke();
}
protected virtual void DrawCursor(Context gr, Rectangle _cursor)
{
CursorColor.SetAsSource (gr, _cursor);
CairoHelpers.CairoRectangle (gr, _cursor, CornerRadius);
gr.Fill();
}
void computeCursorPosition()
{
Rectangle r = ClientRectangle;
PointD p1;
if (_orientation == Orientation.Horizontal) {
cursor = new Rectangle (new Size (_cursorSize, (int)(r.Height)));
p1 = r.TopLeft + new Point (_cursorSize / 2, r.Height / 2);
unity = (double)(r.Width - _cursorSize) / (Maximum - Minimum);
cursor.TopLeft = new Point (r.Left + (int)((Value - Minimum) * unity),
(int)(p1.Y - cursor.Height / 2));
} else {
cursor = new Rectangle (new Size ((int)(r.Width), _cursorSize));
p1 = r.TopLeft + new Point (r.Width / 2, _cursorSize / 2);
unity = (double)(r.Height - _cursorSize) / (Maximum - Minimum);
cursor.TopLeft = new Point ((int)(p1.X - r.Width / 2),
r.Top + (int)((Value - Minimum) * unity));
}
cursor.Inflate (-1);
}
#region mouse handling
public override void onMouseDown (object sender, MouseButtonEventArgs e)
{
base.onMouseDown (sender, e);
Rectangle cursInScreenCoord = ScreenCoordinates (cursor + Slot.Position);
if (cursInScreenCoord.ContainsOrIsEqual (e.Position))
holdCursor = true;
else if (_orientation == Orientation.Horizontal) {
if (e.Position.X < cursInScreenCoord.Left)
Value -= LargeIncrement;
else
Value += LargeIncrement;
} else {
if (e.Position.Y < cursInScreenCoord.Top)
Value -= LargeIncrement;
else
Value += LargeIncrement;
}
}
public override void onMouseUp (object sender,MouseButtonEventArgs e)
{
base.onMouseUp (sender, e);
holdCursor = false;
}
public override void onMouseMove (object sender, MouseMoveEventArgs e)
{
if (holdCursor) {
if (_orientation == Orientation.Horizontal)
Value += (double)e.XDelta / unity;
else
Value += (double)e.YDelta / unity;
}
base.onMouseMove (sender, e);
}
#endregion
}
}
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