source: branches/DataPreprocessing/HeuristicLab.DataPreprocessing.Views/3.3/PreprocessingChartView.cs @ 10736

#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2013 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
 *
 * This file is part of HeuristicLab.
 *
 * HeuristicLab is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * HeuristicLab is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
 */
#endregion

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Windows.Forms;
using HeuristicLab.Analysis;
using HeuristicLab.Analysis.Views;
using HeuristicLab.Collections;
using HeuristicLab.Core;
using HeuristicLab.Core.Views;
using HeuristicLab.Data;
using HeuristicLab.MainForm;

namespace HeuristicLab.DataPreprocessing.Views {

  [View("Preprocessing Chart View")]
  [Content(typeof(PreprocessingChartContent), false)]
  public partial class PreprocessingChartView : ItemView {

    private IChartLogic logic;
    private DataTable dataTable;
    private List<DataTable> dataTablePerVariable;
    private ICheckedItemList<StringValue> variableItemList;
    private List<DataRow> dataRows;

    protected DataRowVisualProperties.DataRowChartType chartType;
    protected string chartTitle;
    protected bool allInOneMode;

    private const string DEFAULT_CHART_TITLE = "Chart";


    public PreprocessingChartView() {
      InitializeComponent();
      chartType = DataRowVisualProperties.DataRowChartType.Line;
      chartTitle = DEFAULT_CHART_TITLE;
      allInOneMode = true;
    }

    private void CheckedItemsChanged(object sender, CollectionItemsChangedEventArgs<IndexedItem<StringValue>> checkedItems) {
      foreach (IndexedItem<StringValue> item in checkedItems.Items) {
        string variableName = item.Value.Value;
        if (VariableIsDisplayed(variableName)) {
          dataTable.Rows.Remove(variableName);
          dataTablePerVariable.Remove(dataTablePerVariable.Find( x => (x.Name == variableName)));
        } else {
          DataRow row = GetDataRow(variableName);
          //row.VisualProperties.Color = GetRandomColor();
          dataTable.Rows.Add(row);
          DataTable d = new DataTable(variableName);
          d.Rows.Add(row);
          dataTablePerVariable.Add(d);
        }
      }

      if (!allInOneMode)
        GenerateChart();

    }

    private Color GetRandomColor() {
      Random randomGen = new Random();
      KnownColor[] names = (KnownColor[])Enum.GetValues(typeof(KnownColor));
      KnownColor randomColorName = names[randomGen.Next(names.Length)];
      Color randomColor = Color.FromKnownColor(randomColorName);
      return randomColor;
    }

    private bool VariableIsDisplayed(string name) {

      foreach (var item in dataTable.Rows) {
        if (item.Name == name)
          return true;
      }
      return false;
    }

    protected override void RegisterContentEvents() {
      base.RegisterContentEvents();
      Content.ChartLogic.Changed += PreprocessingData_Changed;
      
    }

    protected override void DeregisterContentEvents() {
      base.DeregisterContentEvents();
      Content.ChartLogic.Changed -= PreprocessingData_Changed;
    }

    public new PreprocessingChartContent Content {
      get { return (PreprocessingChartContent)base.Content; }
      set { base.Content = value; }
    }

    private void InitData() {
      variableItemList = logic.CreateVariableItemList();
      checkedItemList.Content = variableItemList;
      dataRows = logic.CreateAllDataRows(chartType);

      // init data table
      dataTable = new DataTable(chartTitle);
      dataTable.Rows.AddRange(dataRows);

      // init data table per variable
      dataTablePerVariable = new List<DataTable>();
      foreach(var checkedItem in variableItemList.CheckedItems)  {
        string variableName = variableItemList[checkedItem.Index].Value;
        DataTable d = new DataTable(variableName);
        DataRow row = GetDataRow(variableName);
        //row.VisualProperties.Color = GetRandomColor();
        d.Rows.Add(row);
        dataTablePerVariable.Add(d);
      }

    }

    private DataRow GetDataRow(string variableName) {
      foreach (DataRow row in dataRows) {
        if (row.Name == variableName)
          return row;
      }
      return null;
    }

    protected override void OnContentChanged() {
      base.OnContentChanged();
      if (Content != null) {
        logic = Content.ChartLogic;
        InitData();       
        variableItemList.CheckedItemsChanged += CheckedItemsChanged;
        GenerateChart();                
      }
    }

    // TODO : handle also other changed events
    void PreprocessingData_Changed(object sender, DataPreprocessingChangedEventArgs e) {
      switch (e.Type) {
        case DataPreprocessingChangedEventType.DeleteColumn:
          //RemoveVariable(logic.GetVariableNameByIndex(e.Column));
          break;
        case DataPreprocessingChangedEventType.AddColumn:
          //AddVariable(logic.GetVariableNameByIndex(e.Column));
          break;
        case DataPreprocessingChangedEventType.ChangeColumn:
        case DataPreprocessingChangedEventType.ChangeItem:
          UpdateDataForVariable(logic.GetVariableNameByIndex(e.Column));
          break;
        case DataPreprocessingChangedEventType.DeleteRow:
        case DataPreprocessingChangedEventType.AddRow:
        case DataPreprocessingChangedEventType.Any:
          InitData();
          GenerateChart();
          
          break;
      }
    }

    private void UpdateDataForVariable(string variableName) {
      DataRow newRow = logic.CreateDataRow(variableName, chartType);
      dataTable.Rows.Remove(variableName);
      dataTable.Rows.Add(newRow);
      DataTable dt = dataTablePerVariable.Find(x => x.Rows.Find(y => y.Name == variableName) != null);
      if (dt != null) {
        dt.Rows.Remove(variableName);
        dt.Rows.Add(newRow);
      }
    }

    // add variable to data table and item list
    private void AddVariable(string name) {
      dataTable.Rows.Add(logic.CreateDataRow(name, chartType));
      variableItemList.Add(new StringValue(name));
    }

    // remove variable from data table and item list
    private void RemoveVariable(string name) {
      dataTable.Rows.Remove(name);

      StringValue stringValue = FindVariableItemList(name);
      if (stringValue != null)
        variableItemList.Remove(stringValue);

    }

    private StringValue FindVariableItemList(string name) {
      foreach (StringValue stringValue in variableItemList) {
        if (stringValue.Value == name)
          return stringValue;
      }
      return null;
    }

    protected void GenerateChart() {

      ClearTableLayout();  

      if (allInOneMode) {
        GenerateSingleChartLayout();
      } else
        GenerateMultiChartLayout();
    }

    private void ClearTableLayout() {
      //Clear out the existing controls
      tableLayoutPanel.Controls.Clear();

      //Clear out the existing row and column styles
      tableLayoutPanel.ColumnStyles.Clear();
      tableLayoutPanel.RowStyles.Clear();
      tableLayoutPanel.AutoScroll = false;
      tableLayoutPanel.AutoScroll = true;
    }   

    private void GenerateSingleChartLayout() {
      tableLayoutPanel.ColumnCount = 1;
      tableLayoutPanel.RowCount = 1;
      tableLayoutPanel.ColumnStyles.Add(new ColumnStyle(SizeType.Percent, 100));
      tableLayoutPanel.RowStyles.Add(new RowStyle(SizeType.Percent, 100));
      tableLayoutPanel.Controls.Add(dataTableView, 0, 0);
      dataTableView.Content = dataTable;
    }

    private void GenerateMultiChartLayout() {
      int checkedItemsCnt = 0;
      foreach(var item in variableItemList.CheckedItems)
        checkedItemsCnt++;

      int rows = 0;
      int columns = 0;

      // set columns and rows based on number of items
      if (checkedItemsCnt <= 2)
        columns = 1;
      else if (checkedItemsCnt <= 6)
        columns = 2;
      else
        columns = 3;

      if (columns == 3)
        rows = (checkedItemsCnt+2) / columns;
      else if(columns == 2)
        rows = (checkedItemsCnt + 1) / columns;
      else
        rows = checkedItemsCnt / columns;

      //Now we will generate the table, setting up the row and column counts first
      tableLayoutPanel.ColumnCount = columns;
      tableLayoutPanel.RowCount = rows;

      List<DataTable>.Enumerator enumerator = dataTablePerVariable.GetEnumerator();
      for (int x = 0; x < columns; x++) {
        
        if(rows <= 3)
          tableLayoutPanel.ColumnStyles.Add(new ColumnStyle(SizeType.Percent, 100 / columns));
        else
          //scrollbar is shown if there are more than 3 rows -> remove scroll bar width from total width
          tableLayoutPanel.ColumnStyles.Add(new ColumnStyle(SizeType.Absolute, (tableLayoutPanel.Width - System.Windows.Forms.SystemInformation.VerticalScrollBarWidth) / columns));
        for (int y = 0; y < rows; y++) {
          //Add a row only when creating the first column
          if (x == 0) {
            // fixed chart size when there are more than 3 tables
            if (rows > 3)
              tableLayoutPanel.RowStyles.Add(new RowStyle(SizeType.Absolute, 300));
            else
              tableLayoutPanel.RowStyles.Add(new RowStyle(SizeType.Percent, 100 / rows));
          }

          DataTableView dataView = new DataTableView();
          enumerator.MoveNext();
          DataTable d = enumerator.Current;
          if (d == null) {
            // dummy panel for empty field 
            Panel p = new Panel();
            p.Dock = DockStyle.Fill;
            tableLayoutPanel.Controls.Add(p, y, x);
          }
          else {
            dataView.Content = d;
            dataView.Dock = DockStyle.Fill;
            tableLayoutPanel.Controls.Add(dataView, y, x);
          }
        }
      }
    }

    //Remove horizontal scroll bar if visible
    private void tableLayoutPanel_Layout(object sender, LayoutEventArgs e) {
      if (tableLayoutPanel.HorizontalScroll.Visible) {
        // Add padding on the right in order to accomodate the vertical scrollbar
        int vWidth = SystemInformation.VerticalScrollBarWidth;
        tableLayoutPanel.Padding = new Padding(0, 0, vWidth, 0);
      } else {
        // Reset padding
        tableLayoutPanel.Padding = new Padding(0);
      }
    }

    private void radioButton1_CheckedChanged(object sender, EventArgs e) {
      if (allInOneMode == false)
        allInOneMode = true;
      else
        allInOneMode = false;
      GenerateChart();
    }



  }
}