RGBLHistogramUserControl.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Text;
using System.Windows.Forms;
using be.gaudry.photobrol.view.controls.histogram;
using be.gaudry.photobrol.model.image;
 
namespace be.gaudry.photobrol.view.controls
{
    public partial class RGBLHistogramUserControl : UserControl
    {
 
        private ImageStatistics stat;
        private be.gaudry.model.math.Histogram redMHistogram, greenMHistogram, blueMHistogram;
        public RGBLHistogramUserControl()
        {
            redMHistogram = null;
            greenMHistogram = null;
            blueMHistogram = null;
            InitializeComponent();
        }
 
        // Gather image statistics
        public void GatherStatistics(Bitmap image)
        {
            // avoid calculation in the case of the same image
             /*if (image != null)
            {
               if (currentImageHash == image.GetHashCode())
                    return;
                currentImageHash = image.GetHashCode();
            }*/
            System.Console.WriteLine("set stats");
            redGB.Visible = false;
            greenGB.Visible = false;
            blueGB.Visible = false;
 
            // busy
            Capture = true;
            Cursor = Cursors.WaitCursor;
 
            // get statistics
            stat = (image == null) ? null : new ImageStatistics(image);
 
            // free
            Cursor = Cursors.Arrow;
            Capture = false;
 
            if (stat != null)
            {
                redGB.Visible = (!stat.IsGrayscale);
                greenGB.Visible = redGB.Visible;
                blueGB.Visible = redGB.Visible;
                displayHistogram();
            }
            /*else
            {
                redHistogram.Values = null;
                greenMHistogram = null;
                blueMHistogram = null;
 
                redMeanLabel.Text = String.Empty;
                redStdDevLabel.Text = String.Empty;
                redMedianLabel.Text = String.Empty;
                redMinLabel.Text = String.Empty;
                redMaxLabel.Text = String.Empty;
 
                greenMeanLabel.Text = String.Empty;
                greenStdDevLabel.Text = String.Empty;
                greenMedianLabel.Text = String.Empty;
                greenMinLabel.Text = String.Empty;
                greenMaxLabel.Text = String.Empty;
 
                blueMeanLabel.Text = String.Empty;
                blueStdDevLabel.Text = String.Empty;
                blueMedianLabel.Text = String.Empty;
                blueMinLabel.Text = String.Empty;
                blueMaxLabel.Text = String.Empty;
 
                levelLabel.Text = String.Empty;
                countLabel.Text = String.Empty;
                percentileLabel.Text = String.Empty;
            }*/
        }
 
        private void displayHistogram()
        {
            if (!stat.IsGrayscale)
            {
                redGB.Text = "Rouge";
                redHistogram.Color = Color.Red;
                redMHistogram = stat.Red;
                greenMHistogram = stat.Green;
                blueMHistogram = stat.Blue;
                redGB.Visible = true;
                greenGB.Visible = true;
                blueGB.Visible = true;
            }
            else
            {
                redGB.Text = "Gris";
                redHistogram.Color = Color.Gray;
                redMHistogram = stat.Gray;
                redGB.Visible = true;
            }
 
            if (redMHistogram != null)
            {
                redHistogram.Values = redMHistogram.Values;
 
                redMeanLabel.Text = redMHistogram.Mean.ToString("F2");
                redStdDevLabel.Text = redMHistogram.StdDev.ToString("F2");
                redMedianLabel.Text = redMHistogram.Median.ToString();
                redMinLabel.Text = redMHistogram.Min.ToString();
                redMaxLabel.Text = redMHistogram.Max.ToString();
            }
            if (greenMHistogram != null)
            {
                greenHistogram.Values = greenMHistogram.Values;
 
                greenMeanLabel.Text = greenMHistogram.Mean.ToString("F2");
                greenStdDevLabel.Text = greenMHistogram.StdDev.ToString("F2");
                greenMedianLabel.Text = greenMHistogram.Median.ToString();
                greenMinLabel.Text = greenMHistogram.Min.ToString();
                greenMaxLabel.Text = greenMHistogram.Max.ToString();
            }
            if (blueMHistogram != null)
            {
                blueHistogram.Values = blueMHistogram.Values;
 
                blueMeanLabel.Text = blueMHistogram.Mean.ToString("F2");
                blueStdDevLabel.Text = blueMHistogram.StdDev.ToString("F2");
                blueMedianLabel.Text = blueMHistogram.Median.ToString();
                blueMinLabel.Text = blueMHistogram.Min.ToString();
                blueMaxLabel.Text = blueMHistogram.Max.ToString();
            }
        }
 
        // Cursor position changed over the histogram
        private void histogram_PositionChanged(object sender, HistogramEventArgs e)
        {
            int pos = e.Position;
 
            if (pos != -1)
            {
 
                levelLabel.Text = pos.ToString();
                if (pos < redMHistogram.Values.Length) countLabel.Text = redMHistogram.Values[pos].ToString();
                percentileLabel.Text = ((float)redMHistogram.Values[pos] * 100 / stat.PixelsCount).ToString("F2");
            }
            else
            {
 
                levelLabel.Text = "";
                countLabel.Text = "";
                percentileLabel.Text = "";
            }
        }
 
        // Selection changed in the histogram
        private void histogram_SelectionChanged(object sender, HistogramEventArgs e)
        {
            int min = e.Min;
            int max = e.Max;
            int count = 0;
 
            levelLabel.Text = min.ToString() + "..." + max.ToString();
 
            // count pixels
            for (int i = min; i <= max; i++)
            {
                count += redMHistogram.Values[i];
            }
            countLabel.Text = count.ToString();
            percentileLabel.Text = ((float)count * 100 / stat.PixelsCount).ToString("F2");
        }
 
        // On "Log" check - switch mode
        private void logCheck_CheckedChanged(object sender, System.EventArgs e)
        {
            redHistogram.LogView = logCheck.Checked;
            greenHistogram.LogView = logCheck.Checked;
            blueHistogram.LogView = logCheck.Checked;
        }
 
        private void histogram_MouseEnter(object sender, EventArgs e)
        {
            //System.Console.WriteLine("sender : " + ((Histogram.Histogram)sender).Name);
            colorLbl.BackColor = ((histogram.Histogram)sender).Color;
            mouseOverInfoLbl.Visible = false;
        }
 
        private void histogram_MouseLeave(object sender, EventArgs e)
        {
            mouseOverInfoLbl.Visible = true;
            colorLbl.BackColor = infosGB.BackColor;
        }
    }
}