using System;

 using System.Collections.Generic;

 using System.ComponentModel;

 using System.Text;

 using System.Windows.Forms;

 using OpenHardwareMonitor.Hardware;

 using OpenHardwareMonitor.Utilities;

 namespace OpenHardwareMonitor.GUI {

   public partial class ParameterForm : Form {

     private IReadOnlyArray<IParameter> parameters;

     private BindingList<ParameterRow> parameterRows;

     public ParameterForm() {

       InitializeComponent();

     }

     public IReadOnlyArray<IParameter> Parameters {

       get {

         return parameters;

       }

       set {

         parameters = value;

         parameterRows = new BindingList<ParameterRow>();

         foreach (IParameter parameter in parameters)

           parameterRows.Add(new ParameterRow(parameter));

         bindingSource.DataSource = parameterRows;

       }

     }

     private class ParameterRow : INotifyPropertyChanged {

       public IParameter parameter;

       private float value;

       public bool isDefault;

       public event PropertyChangedEventHandler PropertyChanged;

       private void NotifyPropertyChanged(String propertyName) {

         if (PropertyChanged != null) {

           PropertyChanged(this, new PropertyChangedEventArgs(propertyName));

         }

       }

       public ParameterRow(IParameter parameter){

         this.parameter = parameter;

         this.value = parameter.Value;

         this.isDefault = parameter.IsDefault;

       }

       public string Name {

         get { return parameter.Name; }

       }

       public float Value {

         get { return value; }

         set {            

           this.isDefault = false;

           this.value = value;

           NotifyPropertyChanged("Default");

           NotifyPropertyChanged("Value");

         }

       }

       public bool Default {

         get { return isDefault; }

         set {

           isDefault = value;

           if (value)

             this.value = parameter.DefaultValue;

           NotifyPropertyChanged("Default");

           NotifyPropertyChanged("Value");

         }

       }

     }

     private void dataGridView_RowEnter(object sender, 

       DataGridViewCellEventArgs e) 

     {

       if (e.RowIndex >= 0 && e.RowIndex < parameters.Length)

         descriptionLabel.Text = parameters[e.RowIndex].Description;

       else

         descriptionLabel.Text = "";

     }

     private void dataGridView_CellValidating(object sender, 

       DataGridViewCellValidatingEventArgs e) 

     {

       float value;

       if (e.ColumnIndex == 2 &&

         !float.TryParse(e.FormattedValue.ToString(), out value)) {

         dataGridView.Rows[e.RowIndex].Cells[0].ErrorText = 

           "Invalid value";

         e.Cancel = true;

       }

     }

     private void dataGridView_CellEndEdit(object sender,

       DataGridViewCellEventArgs e) {

       dataGridView.Rows[e.RowIndex].Cells[0].ErrorText = "";

     }

     private void okButton_Click(object sender, EventArgs e) {

       foreach (ParameterRow row in parameterRows) {

         if (row.Default) {

           row.parameter.IsDefault = true;

         } else {

           row.parameter.Value = row.Value;

         }

       }

     }

     private void dataGridView_CurrentCellDirtyStateChanged(object sender, 

       EventArgs e) {

       if (dataGridView.CurrentCell is DataGridViewCheckBoxCell ||

         dataGridView.CurrentCell is DataGridViewComboBoxCell) 

       {

         dataGridView.CommitEdit(DataGridViewDataErrorContexts.Commit);

       }

     }

   }

 }