Subversion Repositories group.electronics

using System;

using System.Collections.Generic;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

namespace NITNavComm {

    public class SevenSegmentArray : UserControl {

        public SevenSegmentArray() {

            this.SuspendLayout();

            this.Name = "SevenSegmentArray";

            this.Size = new System.Drawing.Size(100, 25);

            this.Resize += new System.EventHandler(this.SevenSegmentArray_Resize);

            this.ResumeLayout(false);

            this.TabStop = false;

            elementPadding = new Padding(4, 4, 4, 4);

            RecreateSegments(4);

        }

        /// <summary>

        /// Array of segment controls that are currently children of this control.

        /// </summary>

        private SevenSegment[] segments = null;

        /// <summary>

        /// Change the number of elements in our LED array. This destroys

        /// the previous elements, and creates new ones in their place, applying

        /// all the current options to the new ones.

        /// </summary>

        /// <param name="count">Number of elements to create.</param>

        private void RecreateSegments(int count) {

            if (segments != null)

                for (int i = 0; i < segments.Length; i++) { segments[i].Parent = null; segments[i].Dispose(); }

            if (count <= 0) return;

            segments = new SevenSegment[count];

            for (int i = 0; i < count; i++) {

                segments[i] = new SevenSegment();

                segments[i].Parent = this;

                segments[i].Top = 0;

                segments[i].Height = this.Height;

                segments[i].Anchor = AnchorStyles.Top | AnchorStyles.Bottom;

                segments[i].Visible = true;

            }

            ResizeSegments();

            UpdateSegments();

            this.Value = theValue;

        }

        /// <summary>

        /// Align the elements of the array to fit neatly within the

        /// width of the parent control.

        /// </summary>

        private void ResizeSegments() {

            int segWidth = this.Width / segments.Length;

            for (int i = 0; i < segments.Length; i++) {

                segments[i].Left = this.Width * (segments.Length - 1 - i) / segments.Length;

                segments[i].Width = segWidth;

            }

        }

        /// <summary>

        /// Update the properties of each element with the properties

        /// we have stored.

        /// </summary>

        private void UpdateSegments() {

            for (int i = 0; i < segments.Length; i++) {

                segments[i].ColorBackground = colorBackground;

                segments[i].ColorDark = colorDark;

                segments[i].ColorLight = colorLight;

                segments[i].ElementWidth = elementWidth;

                segments[i].ItalicFactor = italicFactor;

                segments[i].DecimalShow = showDot;

                segments[i].Padding = elementPadding;

            }

        }

        private void SevenSegmentArray_Resize(object sender, EventArgs e) { ResizeSegments(); }

        protected override void OnPaintBackground(PaintEventArgs e) { e.Graphics.Clear(colorBackground); }

        private int elementWidth = 10;

        private float italicFactor = 0.0F;

        private Color colorBackground = Color.DarkGray;

        private Color colorDark = Color.DimGray;

        private Color colorLight = Color.Red;

        private bool showDot = true;

        private Padding elementPadding;

        /// <summary>

        /// Background color of the LED array.

        /// </summary>

        public Color ColorBackground { get { return colorBackground; } set { colorBackground = value; UpdateSegments(); } }

        /// <summary>

        /// Color of inactive LED segments.

        /// </summary>

        public Color ColorDark { get { return colorDark; } set { colorDark = value; UpdateSegments(); } }

        /// <summary>

        /// Color of active LED segments.

        /// </summary>

        public Color ColorLight { get { return colorLight; } set { colorLight = value; UpdateSegments(); } }

        /// <summary>

        /// Width of LED segments.

        /// </summary>

        public int ElementWidth { get { return elementWidth; } set { elementWidth = value; UpdateSegments(); } }

        /// <summary>

        /// Shear coefficient for italicizing the displays. Try a value like -0.1.

        /// </summary>

        public float ItalicFactor { get { return italicFactor; } set { italicFactor = value; UpdateSegments(); } }

        /// <summary>

        /// Specifies if the decimal point LED is displayed.

        /// </summary>

        public bool DecimalShow { get { return showDot; } set { showDot = value; UpdateSegments(); } }

        /// <summary>

        /// Number of seven-segment elements in this array.

        /// </summary>

        public int ArrayCount { get { return segments.Length; } set { if ((value > 0) && (value <= 100)) RecreateSegments(value); } }

        /// <summary>

        /// Padding that applies to each seven-segment element in the array.

        /// Tweak these numbers to get the perfect appearance for the array of your size.

        /// </summary>

        public Padding ElementPadding { get { return elementPadding; } set { elementPadding = value; UpdateSegments(); } }

        private string theValue = null;

        /// <summary>

        /// The value to be displayed on the LED array. This can contain numbers,

        /// certain letters, and decimal points.

        /// </summary>

        public string Value {

            get { return theValue; }

            set {

                theValue = value;

                for (int i = 0; i < segments.Length; i++) { segments[i].CustomPattern = 0; segments[i].DecimalOn = false; }

                if (theValue != null) {

                    int segmentIndex = 0;

                    for (int i = theValue.Length - 1; i >= 0; i--) {

                        if (segmentIndex >= segments.Length) break;

                        if (theValue[i] == '.') segments[segmentIndex].DecimalOn = true;

                        else segments[segmentIndex++].Value = theValue[i].ToString();

                    }

                }

            }

        }

    }

}