source: branches/2971_named_intervals/HeuristicLab.Problems.DataAnalysis.Views/3.4/ParsedConstraintView.cs @ 16787

using System;
using System.Collections.Generic;
using HeuristicLab.Collections;
using HeuristicLab.Core;
using HeuristicLab.MainForm;
using HeuristicLab.MainForm.WindowsForms;

namespace HeuristicLab.Problems.DataAnalysis.Symbolic.Views {
  [View("ParsedConstraint View")]
  [Content(typeof(ParsedConstraint), true)]
  public partial class ParsedConstraintView : AsynchronousContentView {
    private CheckedItemList<IntervalConstraint> intervalConstraints;
    public new ParsedConstraint Content {
      get => (ParsedConstraint)base.Content;
      set => base.Content = value;
    }

    public ParsedConstraintView() {
      InitializeComponent();
      errorOutput.Text = "";
      intervalConstraints = new CheckedItemList<IntervalConstraint>();
      intervalConstraints.CheckedItemsChanged += constraint_CheckedItemChanged;
    }

    protected override void OnContentChanged() {
      base.OnContentChanged();
      UpdateControl();
    }

    private IEnumerable<IntervalConstraint> ParseConstraints(string input) {
      return IntervalConstraintsParser.ParseInput(input, Content.ProblemData.TargetVariable,
        Content.ProblemData.AllowedInputVariables);
    }

    private void parseBtn_Click(object sender, EventArgs e) {
      if (constraintsInput.Text != null) {
        ClearConstraints();
        var parsedConstraints = ParseConstraints(constraintsInput.Text);
        foreach (var constraint in parsedConstraints) {
          constraint.Changed += constraint_Changed;
          intervalConstraints.Add(constraint, constraint.IsChecked);
        }
        constraintsOutput.Content = intervalConstraints;
        Content.Constraints = intervalConstraints;
        Content.Input = constraintsInput.Text;
        errorOutput.Text = "";
      } else {
        errorOutput.Text = "No constraints were found!";
      }
    }

    private void UpdateControl() {
      if (Content == null) {
        ClearConstraints();
        constraintsOutput.Content = intervalConstraints.AsReadOnly();
      } else {
        ClearConstraints();
        constraintsInput.Text = Content.Input;
        foreach (var constraint in Content.Constraints) {
          constraint.Changed += constraint_Changed;
          intervalConstraints.Add(constraint, constraint.IsChecked);
        }

        constraintsOutput.Content = intervalConstraints.AsReadOnly();
      }
      SetEnabledStateOfControls();
    }

    private void constraint_Changed(object sender, EventArgs e) {
      var constraint = (IntervalConstraint) sender;
      intervalConstraints.SetItemCheckedState(constraint, constraint.IsChecked);
    }

    private void constraint_CheckedItemChanged(object sender,
      CollectionItemsChangedEventArgs<IndexedItem<IntervalConstraint>> e) {
      ICheckedItemList<IntervalConstraint> checkedItemList = (ICheckedItemList<IntervalConstraint>) sender;
      foreach (var indexedItem in e.Items) {
        indexedItem.Value.IsChecked = checkedItemList.ItemChecked(indexedItem.Value);
      }
    }

    private void constraintsInput_TextChanged(object sender, EventArgs e) {
      errorOutput.Text = "Unparsed changes! Press parse button to save changes.";
    }

    private void ClearConstraints() {
      foreach (var constraint in intervalConstraints) {
        constraint.Changed -= constraint_Changed;
      }
      intervalConstraints.Clear();
    }

  }
}