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Queue-Linear Flood Fill: A Fast Flood Fill Algorithm

, 15 Nov 2006
A super-fast flood fill algorithm and implementation, plus helpful optimization tips for image processing.
largepic.zip
queuelinearfloodfill_demo.zip
queuelinearfloodfill_src.zip
FloodFill2
bin
Release
hills_sm.jpg
peaches_sm.jpg
poppy_sm.jpg
Properties
Settings.settings
Resources
NoAction.bmp
OpenFolder.bmp
Save.bmp
snail.png
Thumbs.db
FloodFill2.exe
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Text;
using System.Windows.Forms;

namespace FloodFill2
{
    public partial class TextBoxSlider : UserControl
    {
        public TextBoxSlider()
        {
            InitializeComponent();
            UpdateText();
        }

        [Category("Behavior"), DefaultValue(0f)]
        public float Value
        {
            get { return FromSliderValue(trackBar.Value); }
            set { trackBar.Value = ToSliderValue(value); }
        }

        private int decimalPlaces;

        [Category("Behavior"), DefaultValue(0f)]
        public int DecimalPlaces
        {
            get { return decimalPlaces; }
            set { decimalPlaces = value; }
        }

        [Category("Behavior"), DefaultValue(100f)]
        public float Maximum
        {
            get { return FromSliderValue(trackBar.Maximum); }
            set { trackBar.Maximum = ToSliderValue(value); }
        }

        [Category("Behavior"), DefaultValue(0f)]
        public float Minimum
        {
            get { return FromSliderValue(trackBar.Minimum); }
            set { trackBar.Minimum = ToSliderValue(value); }
        }

        [Category("Behavior"), DefaultValue(1f)]
        public float SmallChange
        {
            get { return FromSliderValue(trackBar.SmallChange); }
            set { trackBar.SmallChange = ToSliderValue(value); }
        }

        [Category("Behavior"), DefaultValue(5f)]
        public float LargeChange
        {
            get { return FromSliderValue(trackBar.LargeChange); }
            set { trackBar.LargeChange = ToSliderValue(value); }
        }

        [Category("Appearance"), DefaultValue(1f)]
        public float TickFrequency
        {
            get { return FromSliderValue(trackBar.TickFrequency); }
            set { trackBar.TickFrequency = ToSliderValue(value); }
        }

        [Category("Appearance"), DefaultValue(TickStyle.BottomRight)]
        public TickStyle TickStyle
        {
            get { return trackBar.TickStyle; }
            set { trackBar.TickStyle = value; }
        }

        public override string Text
        {
            get
            {
                return textBox.Text;
            }
            set
            {
                textBox.Text = value;
            }
        }

        int ToSliderValue(float val)
        {
            float fval=(float)(val * Math.Pow(10, decimalPlaces));
            if(fval>(float)int.MaxValue)
                throw new ArgumentOutOfRangeException();
            return (int) fval;
        }

        float FromSliderValue(int val)
        {
            return (float)(((float)val) * Math.Pow(10, -decimalPlaces));
        }

        private void textBox_TextChanged(object sender, EventArgs e)
        {
            float fVal;
            if (float.TryParse(textBox.Text, out fVal))
            {
                if (fVal > Maximum || fVal < Minimum)
                    SetTextBoxValidState(false);
                else
                {
                    Value = fVal;
                    SetTextBoxValidState(true);
                }
            }
            else
                SetTextBoxValidState(false);
            OnTextChanged(e);

        }

        bool textBoxValid = true;
        private void SetTextBoxValidState(bool valid)
        {
            textBoxValid = valid;
            if (valid)
                textBox.BackColor = Color.White;
            else
                textBox.BackColor = Color.FromArgb(255, 220, 220);
        }

        public event EventHandler ValueChanged;

        private void trackBar_ValueChanged(object sender, EventArgs e)
        {
            UpdateText();
            if (ValueChanged != null)
                ValueChanged(this, e);
        }

        void UpdateText()
        {
            //Use roundtrip formatting specifier so that the string value
            //will be the same when converted roundtrip.
            Text = Value.ToString("r");
        }

        private void textBox_Leave(object sender, EventArgs e)
        {
            if (!textBoxValid)
                UpdateText();
        }

        public event EventHandler TrackBarScroll;

        private void trackBar_Scroll(object sender, EventArgs e)
        {
            if (TrackBarScroll != null)
                TrackBarScroll(this, e);
        }
        
        
    }
}

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About the Author

J. Dunlap
Web Developer
United States United States
My main goal as a developer is to improve the way software is designed, and how it interacts with the user. I like designing software best, but I also like coding and documentation. I especially like to work with user interfaces and graphics.
 
I have extensive knowledge of the .NET Framework, and like to delve into its internals. I specialize in working with VG.net and MyXaml. I also like to work with ASP.NET, AJAX, and DHTML.

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