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-rw-r--r--src/GraphicObjects/Slider.cs251
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diff --git a/src/GraphicObjects/Slider.cs b/src/GraphicObjects/Slider.cs
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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
-{
- /// <summary>
- /// templated numeric control to select a value
- /// by slidding a cursor
- /// </summary>
- public class Slider : NumericControl
- {
- #region CTOR
- protected 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
- [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);
- }
- }
- [DefaultValue(20)]
- public virtual int CursorSize {
- get { return _cursorSize; }
- set {
- if (_cursorSize == value || value < 8)
- return;
- _cursorSize = value;
- RegisterForGraphicUpdate ();
- NotifyValueChanged ("CursorSize", _cursorSize);
- }
- }
- [DefaultValue(Orientation.Horizontal)]
- public virtual Orientation Orientation
- {
- get { return _orientation; }
- set {
- if (_orientation == value)
- return;
- _orientation = value;
-
- RegisterForLayouting (LayoutingType.All);
- NotifyValueChanged ("Orientation", _orientation);
- }
- }
- #endregion
-
- [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);
- pStart.Y += 0.5;
- pEnd.Y += 0.5;
- } else {
- pStart = r.TopLeft + new Point (r.Width / 2, _cursorSize / 2);
- pEnd = r.BottomLeft + new Point (r.Width / 2,- _cursorSize / 2);
- pStart.X += 0.5;
- pEnd.X += 0.5;
-
- }
-
- 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);
- }
- Point mouseDownInit;
- double mouseDownInitValue;
-
- #region mouse handling
- public override void onMouseDown (object sender, MouseButtonEventArgs e)
- {
- base.onMouseDown (sender, e);
- mouseDownInit = ScreenPointToLocal (e.Position);
- mouseDownInitValue = Value;
- Rectangle cursInScreenCoord = ScreenCoordinates (cursor + Slot.Position);
- if (cursInScreenCoord.ContainsOrIsEqual (e.Position)){
-// Rectangle r = ClientRectangle;
-// if (r.Width - _cursorSize > 0) {
-// double unit = (Maximum - Minimum) / (double)(r.Width - _cursorSize);
-// mouseDownInit += new Point ((int)(Value / unit), (int)(Value / unit));
-// }
- 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) {
- Point m = ScreenPointToLocal (e.Position) - mouseDownInit;
- Rectangle r = ClientRectangle;
-
- if (_orientation == Orientation.Horizontal) {
- if (r.Width - _cursorSize == 0)
- return;
- double unit = (Maximum - Minimum) / (double)(r.Width - _cursorSize);
- double tmp = mouseDownInitValue + (double)m.X * unit;
- tmp -= tmp % SmallIncrement;
- Value = tmp;
- } else {
- if (r.Height - _cursorSize == 0)
- return;
- double unit = (Maximum - Minimum) / (double)(r.Height - _cursorSize);
- double tmp = mouseDownInitValue + (double)m.Y * unit;
- tmp -= tmp % SmallIncrement;
- Value = tmp;
- }
- }
-
- base.onMouseMove (sender, e);
- }
- #endregion
- }
-}
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