C#实现仪表盘
1、仪表盘控件
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace DashboardApp
{
[ToolboxBitmapAttribute(typeof(Dashboard), "Dashboard.bmp"),
DefaultEvent("ValueInRangeChanged"),
Description("Displays a value on an analog gauge. Raises an event if the value enters one of the definable ranges.")]
public class Dashboard:Control
{
public Dashboard()
{
SetStyle(ControlStyles.OptimizedDoubleBuffer, true);
}
#region enum, var, delegate, event
public enum NeedleColorEnum
{
Gray = 0,
Red = 1,
Green = 2,
Blue = 3,
Yellow = 4,
Violet = 5,
Magenta = 6
};
private const Byte ZERO = 0;
private const Byte NUMOFCAPS = 5;
private const Byte NUMOFRANGES = 5;
private Single fontBoundY1;
private Single fontBoundY2;
private Bitmap gaugeBitmap;
private Boolean drawGaugeBackground = true;
private Single m_value;
private Boolean[] m_valueIsInRange = {
false, false, false, false, false };
private Byte m_CapIdx = 1;
private Color[] m_CapColor = {
Color.Black, Color.Black, Color.Black, Color.Black, Color.Black };
private String[] m_CapText = {
"", "", "", "", "" };
private Point[] m_CapPosition = {
new Point(10, 10), new Point(10, 10), new Point(10, 10), new Point(10, 10), new Point(10, 10) };
private Point m_Center = new Point(100, 100);
private Single m_MinValue = -100;
private Single m_MaxValue = 400;
private Color m_BaseArcColor = Color.Gray;
private Int32 m_BaseArcRadius = 80;
private Int32 m_BaseArcStart = 135;
private Int32 m_BaseArcSweep = 270;
private Int32 m_BaseArcWidth = 2;
private Color m_ScaleLinesInterColor = Color.Black;
private Int32 m_ScaleLinesInterInnerRadius = 73;
private Int32 m_ScaleLinesInterOuterRadius = 80;
private Int32 m_ScaleLinesInterWidth = 1;
private Int32 m_ScaleLinesMinorNumOf = 9;
private Color m_ScaleLinesMinorColor = Color.Gray;
private Int32 m_ScaleLinesMinorInnerRadius = 75;
private Int32 m_ScaleLinesMinorOuterRadius = 80;
private Int32 m_ScaleLinesMinorWidth = 1;
private Single m_ScaleLinesMajorStepValue = 50.0f;
private Color m_ScaleLinesMajorColor = Color.Black;
private Int32 m_ScaleLinesMajorInnerRadius = 70;
private Int32 m_ScaleLinesMajorOuterRadius = 80;
private Int32 m_ScaleLinesMajorWidth = 2;
private Byte m_RangeIdx;
private Boolean[] m_RangeEnabled = {
true, true, false, false, false };
private Color[] m_RangeColor = {
Color.LightGreen, Color.Red, Color.FromKnownColor(KnownColor.Control), Color.FromKnownColor(KnownColor.Control), Color.FromKnownColor(KnownColor.Control) };
private Single[] m_RangeStartValue = {
-100.0f, 300.0f, 0.0f, 0.0f, 0.0f };
private Single[] m_RangeEndValue = {
300.0f, 400.0f, 0.0f, 0.0f, 0.0f };
private Int32[] m_RangeInnerRadius = {
70, 70, 70, 70, 70 };
private Int32[] m_RangeOuterRadius = {
80, 80, 80, 80, 80 };
private Int32 m_ScaleNumbersRadius = 95;
private Color m_ScaleNumbersColor = Color.Black;
private String m_ScaleNumbersFormat;
private Int32 m_ScaleNumbersStartScaleLine;
private Int32 m_ScaleNumbersStepScaleLines = 1;
private Int32 m_ScaleNumbersRotation = 0;
private Int32 m_NeedleType = 0;
private Int32 m_NeedleRadius = 80;
private NeedleColorEnum m_NeedleColor1 = NeedleColorEnum.Gray;
private Color m_NeedleColor2 = Color.DimGray;
private Int32 m_NeedleWidth = 2;
public class ValueInRangeChangedEventArgs : EventArgs
{
public Int32 valueInRange;
public ValueInRangeChangedEventArgs(Int32 valueInRange)
{
this.valueInRange = valueInRange;
}
}
public delegate void ValueInRangeChangedDelegate(Object sender, ValueInRangeChangedEventArgs e);
[Description("This event is raised if the value falls into a defined range.")]
public event ValueInRangeChangedDelegate ValueInRangeChanged;
#endregion
#region hidden , overridden inherited properties
public new Boolean AllowDrop
{
get
{
return false;
}
set
{
}
}
public new Boolean AutoSize
{
get
{
return false;
}
set
{
}
}
public new Boolean ForeColor
{
get
{
return false;
}
set
{
}
}
public new Boolean ImeMode
{
get
{
return false;
}
set
{
}
}
public override System.Drawing.Color BackColor
{
get
{
return base.BackColor;
}
set
{
base.BackColor = value;
drawGaugeBackground = true;
Refresh();
}
}
public override System.Drawing.Font Font
{
get
{
return base.Font;
}
set
{
base.Font = value;
drawGaugeBackground = true;
Refresh();
}
}
public override System.Windows.Forms.ImageLayout BackgroundImageLayout
{
get
{
return base.BackgroundImageLayout;
}
set
{
base.BackgroundImageLayout = value;
drawGaugeBackground = true;
Refresh();
}
}
#endregion
#region properties
[System.ComponentModel.Browsable(true),
System.ComponentModel.Category("AGauge"),
System.ComponentModel.Description("The value.")]
public Single Value
{
get
{
return m_value;
}
set
{
if (m_value != value)
{
m_value = Math.Min(Math.Max(value, m_MinValue), m_MaxValue);
if (this.DesignMode)
{
drawGaugeBackground = true;
}
for (Int32 counter = 0; counter < NUMOFRANGES - 1; counter++)
{
if ((m_RangeStartValue[counter] <= m_value)
&& (m_value <= m_RangeEndValue[counter])
&& (m_RangeEnabled[counter]))
{
if (!m_valueIsInRange[counter])
{
if (ValueInRangeChanged != null)
{
ValueInRangeChanged(this, new ValueInRangeChangedEventArgs(counter));
}
}
}
else
{
m_valueIsInRange[counter] = false;
}
}
Refresh();
}
}
}
[System.ComponentModel.Browsable(true),
System.ComponentModel.Category("AGauge"),
System.ComponentModel.RefreshProperties(RefreshProperties.All),
System.ComponentModel.Description("The caption index. set this to a value of 0 up to 4 to change the corresponding caption's properties.")]
public Byte Cap_Idx
{
get
{
return m_CapIdx;
}
set
{
if ((m_CapIdx != value)
&& (0 <= value)
&& (value < 5))
{
m_CapIdx = value;
}
}
}
[System.ComponentModel.Browsable(true),
System.ComponentModel.Category("AGauge"),
System.ComponentModel.Description("The color of the caption text.")]
private Color CapColor
{
get
{
return m_CapColor[m_CapIdx];
}
set
{
if (m_CapColor[m_CapIdx] != value)
{
m_CapColor[m_CapIdx] = value;
CapColors = m_CapColor;
drawGaugeBackground = true;
Refresh();
}
}
}
[System.ComponentModel.Browsable(false)]
public Color[] CapColors
{
get
{
return m_CapColor;
}
set
{
m_CapColor = value;
}
}
[System.ComponentModel.Browsable(true),
System.ComponentModel.Category("AGauge"),
System.ComponentModel.Description("The text of the caption.")]
public String CapText
{
get
{
return m_CapText[m_CapIdx];
}
set
{
if (m_CapText[m_CapIdx] != value)
{
m_CapText[m_CapIdx] = value;
CapsText = m_CapText;
drawGaugeBackground = true;
Refresh();
}
}
}
[System.ComponentModel.Browsable(false)]
public String[] CapsText
{
get
{
return m_CapText;
}
set
{
for (Int32 counter = 0; counter < 5; counter++)
{
m_CapText[counter] = value[counter];
}
}
}
[System.ComponentModel.Browsable(true),
System.ComponentModel.Category("AGauge"),
System.ComponentModel.Description("The position of the caption.")]
public Point CapPosition
{
get
{
return m_CapPosition[m_CapIdx];
}
set
{
if (m_CapPosition[m_CapIdx] != value)
{
m_CapPosition[m_CapIdx] = value;
CapsPosition = m_CapPosition;
drawGaugeBackground = true;
Refresh();
}
}
}
[System.ComponentModel.Browsable(false)]
public Point[] CapsPosition
{
get
{
return m_CapPosition;
}
set
{
m_CapPosition = value;
}
}
[System.ComponentModel.Browsable(true),
System.ComponentModel.Category("AGauge"),
System.ComponentModel.Description("The center of the gauge (in the control's client area).")]
public Point Center
{
get
{
return m_Center;
}
set
{
if (m_Center != value)
{
m_Center = value;
drawGaugeBackground = true;
Refresh();
}
}
}
[System.ComponentModel.Browsable(true),
System.ComponentModel.Category("AGauge"),
System.ComponentModel.Description("The minimum value to show on the scale.")]
public Single MinValue
{
get
{
return m_MinValue;
}
set
{
if ((m_MinValue != value)
&& (value < m_MaxValue))
{
m_MinValue = value;
drawGaugeBackground = true;
Refresh();
}
}
}
[System.ComponentModel.Browsable(true),
System.ComponentModel.Category("AGauge"),
System.ComponentModel.Description("The maximum value to show on the scale.")]
public Single MaxValue
{
get
{
return m_MaxValue;
}
set
{
if ((m_MaxValue != value)
&& (value > m_MinValue))
{
m_MaxValue = value;
drawGaugeBackground = true;
Refresh();
}
}
}
[System.ComponentModel.Browsable