Imports System.Windows.Forms

Public Class frmEditWork
    Inherits OrganLit.BaseEditForm

    Private mobjDetailWork As New clsWork
    Private m_objHymnTuneNamesHash As Hashtable
    Private m_objComposersHash As Hashtable
    Private m_objInstrumentationsHash As Hashtable

#Region " Windows Form Designer generated code "

    Public Sub New()
        MyBase.New()

        'This call is required by the Windows Form Designer.
        InitializeComponent()

        'Add any initialization after the InitializeComponent() call

    End Sub

    'Form overrides dispose to clean up the component list.
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing Then
            If Not (components Is Nothing) Then
                components.Dispose()
            End If
        End If
        MyBase.Dispose(disposing)
    End Sub

    'Required by the Windows Form Designer
    Private components As System.ComponentModel.IContainer

    'NOTE: The following procedure is required by the Windows Form Designer
    'It can be modified using the Windows Form Designer.  
    'Do not modify it using the code editor.
    Friend WithEvents lblHymnTuneName As Windows.Forms.Label
    Friend WithEvents cboHymnTuneName As ComboTypeAhead.ComboTypeAhead
    Friend WithEvents lblWorkName As Windows.Forms.Label
    Friend WithEvents txtWorkName As Windows.Forms.TextBox
    Friend WithEvents lblBook As Windows.Forms.Label
    Friend WithEvents lblPageNumber As Windows.Forms.Label
    Friend WithEvents txtPageNumber As Windows.Forms.TextBox
    Friend WithEvents cboBook As Windows.Forms.ComboBox
    Friend WithEvents cboComposerName As ComboTypeAhead.ComboTypeAhead
    Friend WithEvents lblComposerName As Windows.Forms.Label
    Friend WithEvents cboInstrumentationName As ComboTypeAhead.ComboTypeAhead
    Friend WithEvents lblInstrumentation As Windows.Forms.Label
    Friend WithEvents txtOpusInfo As Windows.Forms.TextBox
    Friend WithEvents lblOpusInfo As Windows.Forms.Label
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.lblWorkName = New Windows.Forms.Label()
        Me.txtWorkName = New Windows.Forms.TextBox()
        Me.lblBook = New Windows.Forms.Label()
        Me.lblHymnTuneName = New Windows.Forms.Label()
        Me.cboHymnTuneName = New ComboTypeAhead.ComboTypeAhead()
        Me.lblPageNumber = New Windows.Forms.Label()
        Me.txtPageNumber = New Windows.Forms.TextBox()
        Me.cboBook = New Windows.Forms.ComboBox()
        Me.cboComposerName = New ComboTypeAhead.ComboTypeAhead()
        Me.lblComposerName = New Windows.Forms.Label()
        Me.txtOpusInfo = New Windows.Forms.TextBox()
        Me.lblOpusInfo = New Windows.Forms.Label()
        Me.cboInstrumentationName = New ComboTypeAhead.ComboTypeAhead()
        Me.lblInstrumentation = New Windows.Forms.Label()
        Me.fraAddEdit.SuspendLayout()
        Me.SuspendLayout()
        '
        'fraAddEdit
        '
        Me.fraAddEdit.Controls.Add(Me.cboInstrumentationName)
        Me.fraAddEdit.Controls.Add(Me.lblInstrumentation)
        Me.fraAddEdit.Controls.Add(Me.txtOpusInfo)
        Me.fraAddEdit.Controls.Add(Me.lblOpusInfo)
        Me.fraAddEdit.Controls.Add(Me.cboComposerName)
        Me.fraAddEdit.Controls.Add(Me.lblComposerName)
        Me.fraAddEdit.Controls.Add(Me.cboBook)
        Me.fraAddEdit.Controls.Add(Me.txtPageNumber)
        Me.fraAddEdit.Controls.Add(Me.lblPageNumber)
        Me.fraAddEdit.Controls.Add(Me.cboHymnTuneName)
        Me.fraAddEdit.Controls.Add(Me.lblHymnTuneName)
        Me.fraAddEdit.Controls.Add(Me.lblBook)
        Me.fraAddEdit.Controls.Add(Me.txtWorkName)
        Me.fraAddEdit.Controls.Add(Me.lblWorkName)
        Me.fraAddEdit.Location = New System.Drawing.Point(12, 381)
        Me.fraAddEdit.Size = New System.Drawing.Size(1123, 220)
        Me.fraAddEdit.Controls.SetChildIndex(Me.lblWorkName, 0)
        Me.fraAddEdit.Controls.SetChildIndex(Me.txtWorkName, 0)
        Me.fraAddEdit.Controls.SetChildIndex(Me.lblBook, 0)
        Me.fraAddEdit.Controls.SetChildIndex(Me.lblHymnTuneName, 0)
        Me.fraAddEdit.Controls.SetChildIndex(Me.cboHymnTuneName, 0)
        Me.fraAddEdit.Controls.SetChildIndex(Me.lblPageNumber, 0)
        Me.fraAddEdit.Controls.SetChildIndex(Me.txtPageNumber, 0)
        Me.fraAddEdit.Controls.SetChildIndex(Me.cboBook, 0)
        Me.fraAddEdit.Controls.SetChildIndex(Me.lblComposerName, 0)
        Me.fraAddEdit.Controls.SetChildIndex(Me.cboComposerName, 0)
        Me.fraAddEdit.Controls.SetChildIndex(Me.lblOpusInfo, 0)
        Me.fraAddEdit.Controls.SetChildIndex(Me.txtOpusInfo, 0)
        Me.fraAddEdit.Controls.SetChildIndex(Me.lblInstrumentation, 0)
        Me.fraAddEdit.Controls.SetChildIndex(Me.cboInstrumentationName, 0)
        '
        'lblWorkName
        '
        Me.lblWorkName.Location = New System.Drawing.Point(19, 127)
        Me.lblWorkName.Name = "lblWorkName"
        Me.lblWorkName.Size = New System.Drawing.Size(115, 18)
        Me.lblWorkName.TabIndex = 8
        Me.lblWorkName.Text = "Work Name"
        '
        'txtWorkName
        '
        Me.txtWorkName.Location = New System.Drawing.Point(134, 127)
        Me.txtWorkName.Name = "txtWorkName"
        Me.txtWorkName.Size = New System.Drawing.Size(701, 22)
        Me.txtWorkName.TabIndex = 9
        '
        'lblBook
        '
        Me.lblBook.Location = New System.Drawing.Point(19, 18)
        Me.lblBook.Name = "lblBook"
        Me.lblBook.Size = New System.Drawing.Size(96, 19)
        Me.lblBook.TabIndex = 0
        Me.lblBook.Text = "Book"
        '
        'lblHymnTuneName
        '
        Me.lblHymnTuneName.Location = New System.Drawing.Point(19, 182)
        Me.lblHymnTuneName.Name = "lblHymnTuneName"
        Me.lblHymnTuneName.Size = New System.Drawing.Size(115, 19)
        Me.lblHymnTuneName.TabIndex = 12
        Me.lblHymnTuneName.Text = "Hymn Tune Name"
        '
        'cboHymnTuneName
        '
        Me.cboHymnTuneName.Location = New System.Drawing.Point(134, 182)
        Me.cboHymnTuneName.Name = "cboHymnTuneName"
        Me.cboHymnTuneName.Size = New System.Drawing.Size(346, 24)
        Me.cboHymnTuneName.Sorted = True
        Me.cboHymnTuneName.TabIndex = 13
        '
        'lblPageNumber
        '
        Me.lblPageNumber.Location = New System.Drawing.Point(19, 46)
        Me.lblPageNumber.Name = "lblPageNumber"
        Me.lblPageNumber.Size = New System.Drawing.Size(96, 19)
        Me.lblPageNumber.TabIndex = 2
        Me.lblPageNumber.Text = "Page Number"
        '
        'txtPageNumber
        '
        Me.txtPageNumber.Location = New System.Drawing.Point(134, 46)
        Me.txtPageNumber.Name = "txtPageNumber"
        Me.txtPageNumber.Size = New System.Drawing.Size(77, 22)
        Me.txtPageNumber.TabIndex = 3
        '
        'cboBook
        '
        Me.cboBook.DropDownStyle = Windows.Forms.ComboBoxStyle.DropDownList
        Me.cboBook.Location = New System.Drawing.Point(134, 18)
        Me.cboBook.Name = "cboBook"
        Me.cboBook.Size = New System.Drawing.Size(509, 24)
        Me.cboBook.Sorted = True
        Me.cboBook.TabIndex = 1
        '
        'cboComposerName
        '
        Me.cboComposerName.Location = New System.Drawing.Point(134, 99)
        Me.cboComposerName.Name = "cboComposerName"
        Me.cboComposerName.Size = New System.Drawing.Size(509, 24)
        Me.cboComposerName.Sorted = True
        Me.cboComposerName.TabIndex = 7
        '
        'lblComposerName
        '
        Me.lblComposerName.Location = New System.Drawing.Point(19, 99)
        Me.lblComposerName.Name = "lblComposerName"
        Me.lblComposerName.Size = New System.Drawing.Size(115, 19)
        Me.lblComposerName.TabIndex = 6
        Me.lblComposerName.Text = "Composer Name"
        '
        'txtOpusInfo
        '
        Me.txtOpusInfo.Location = New System.Drawing.Point(134, 155)
        Me.txtOpusInfo.Name = "txtOpusInfo"
        Me.txtOpusInfo.Size = New System.Drawing.Size(250, 22)
        Me.txtOpusInfo.TabIndex = 11
        '
        'lblOpusInfo
        '
        Me.lblOpusInfo.Location = New System.Drawing.Point(19, 155)
        Me.lblOpusInfo.Name = "lblOpusInfo"
        Me.lblOpusInfo.Size = New System.Drawing.Size(115, 18)
        Me.lblOpusInfo.TabIndex = 10
        Me.lblOpusInfo.Text = "Opus Info"
        '
        'cboInstrumentationName
        '
        Me.cboInstrumentationName.Location = New System.Drawing.Point(134, 73)
        Me.cboInstrumentationName.Name = "cboInstrumentationName"
        Me.cboInstrumentationName.Size = New System.Drawing.Size(509, 24)
        Me.cboInstrumentationName.Sorted = True
        Me.cboInstrumentationName.TabIndex = 5
        '
        'lblInstrumentation
        '
        Me.lblInstrumentation.Location = New System.Drawing.Point(19, 73)
        Me.lblInstrumentation.Name = "lblInstrumentation"
        Me.lblInstrumentation.Size = New System.Drawing.Size(115, 18)
        Me.lblInstrumentation.TabIndex = 4
        Me.lblInstrumentation.Text = "Instrumentation"
        '
        'frmEditWork
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 15)
        Me.ClientSize = New System.Drawing.Size(1143, 608)
        Me.MinimumSize = New System.Drawing.Size(1018, 655)
        Me.Name = "frmEditWork"
        Me.StartPosition = Windows.Forms.FormStartPosition.Manual
        Me.Text = "Edit Work"
        Me.fraAddEdit.ResumeLayout(False)
        Me.fraAddEdit.PerformLayout()
        Me.ResumeLayout(False)

    End Sub

#End Region

    Protected Overrides Sub LoadExistingItemsList()
        Dim lobjWork As clsWork
        Dim lobjWorks As System.Collections.Generic.List(Of clsWork)

        SetUpExistingItemsHeaders()

        lobjWorks = clsWork.GetAllWorks

        Me.ExistingItemsListSuspendLayout()

        For Each lobjWork In lobjWorks
            Me.ExistingObjectsListItems.Add(ConvertWorkToListViewItem(lobjWork))
        Next

        Me.ExistingItemsListResumeLayout()

    End Sub

    Private Sub SetUpExistingItemsHeaders()
        Me.ExistingObjectsListColumns.Add("Composer", 200, HorizontalAlignment.Left)
        Me.ExistingObjectsListColumns.Add("Work Name", 300, HorizontalAlignment.Left)
        Me.ExistingObjectsListColumns.Add("Book", 300, HorizontalAlignment.Left)
        Me.ExistingObjectsListColumns.Add("Page", 100, HorizontalAlignment.Right)
        Me.ExistingObjectsListColumns.Add("Hymn Tune Name", 200, HorizontalAlignment.Left)
        Me.ExistingObjectsListColumns.Add("Instrumentation", 200, HorizontalAlignment.Left)

        'Set up sorting rules
        Dim lobjBaseEditFormColumnSortRules(5) As clsGridColumnSortRule

        'First column, sort by Composer, then Work Name
        lobjBaseEditFormColumnSortRules(0) = New clsGridColumnSortRule(clsGridColumnSortRule.enumSortType.SortAsString)
        lobjBaseEditFormColumnSortRules(0).SubColumnSort = New clsGridSubColumnSortRule(1, clsGridSubColumnSortRule.enumSortType.SortAsNumber, Nothing)
        'Second column, sort by Work Name, then Composer
        lobjBaseEditFormColumnSortRules(1) = New clsGridColumnSortRule(clsGridColumnSortRule.enumSortType.SortAsString)
        lobjBaseEditFormColumnSortRules(1).SubColumnSort = New clsGridSubColumnSortRule(0, clsGridSubColumnSortRule.enumSortType.SortAsString, Nothing)
        'Third column, sort by Book, then Page
        lobjBaseEditFormColumnSortRules(2) = New clsGridColumnSortRule(clsGridColumnSortRule.enumSortType.SortAsString)
        lobjBaseEditFormColumnSortRules(2).SubColumnSort = New clsGridSubColumnSortRule(3, clsGridSubColumnSortRule.enumSortType.SortAsNumber, Nothing)
        'Fourth column, sort by Book, then Page
        lobjBaseEditFormColumnSortRules(3) = New clsGridColumnSortRule(clsGridColumnSortRule.enumSortType.SortNone)
        lobjBaseEditFormColumnSortRules(3).SubColumnSort = New clsGridSubColumnSortRule(2, clsGridSubColumnSortRule.enumSortType.SortAsString, New clsGridSubColumnSortRule(3, clsGridSubColumnSortRule.enumSortType.SortAsNumber, Nothing))
        'Fifth column, sort by Hymn Tune Name, then Composer
        lobjBaseEditFormColumnSortRules(4) = New clsGridColumnSortRule(clsGridColumnSortRule.enumSortType.SortAsString)
        lobjBaseEditFormColumnSortRules(4).SubColumnSort = New clsGridSubColumnSortRule(0, clsGridSubColumnSortRule.enumSortType.SortAsString, Nothing)
        'Sixth column, sort by Instrumentation, then Book, then Page
        lobjBaseEditFormColumnSortRules(5) = New clsGridColumnSortRule(clsGridColumnSortRule.enumSortType.SortAsString)
        lobjBaseEditFormColumnSortRules(5).SubColumnSort = New clsGridSubColumnSortRule(2, clsGridSubColumnSortRule.enumSortType.SortAsString, New clsGridSubColumnSortRule(3, clsGridSubColumnSortRule.enumSortType.SortAsNumber, Nothing))

        MyBaseEditFormColumnSortRules = lobjBaseEditFormColumnSortRules

    End Sub

    Protected Overrides Sub InitializeDetailControls()

        'Load data to detail controls here at form load time
        txtWorkName.MaxLength = MyGlobals.WORK_NAME_SIZE
        txtOpusInfo.MaxLength = MyGlobals.OPUS_INFO_SIZE
        cboComposerName.MaxLength = MyGlobals.COMPOSER_NAME_SIZE
        cboInstrumentationName.MaxLength = MyGlobals.INSTRUMENTATION_NAME_SIZE
        cboHymnTuneName.MaxLength = MyGlobals.HYMN_TUNE_NAME_SIZE

        txtPageNumber.Text = ""
        txtWorkName.Text = ""
        txtOpusInfo.Text = ""

        'Only set up book if first time in
        If cboBook.Items.Count = 0 Then
            Dim objBook As clsBook
            Dim objBooks As System.Collections.Generic.List(Of clsBook)

            Me.cboBook.Items.Clear()

            objBooks = clsBook.GetAllBooks
            For Each objBook In objBooks
                Me.cboBook.Items.Add(objBook)
            Next

            'Select first book if there is one
            If Me.cboBook.Items.Count > 0 Then
                Me.cboBook.SelectedIndex = 0
            End If
        End If

        If m_objComposersHash Is Nothing Then
            m_objComposersHash = New Hashtable
        End If

        If cboComposerName.Items.Count = 0 Then
            Dim objComposer As clsComposer
            Dim objComposers As System.Collections.Generic.List(Of clsComposer)

            Me.cboComposerName.Items.Clear()
            m_objComposersHash = New Hashtable

            objComposers = clsComposer.GetAllComposers
            For Each objComposer In objComposers
                AddComposerToForm(objComposer)
            Next
        End If

        If m_objInstrumentationsHash Is Nothing Then
            m_objInstrumentationsHash = New Hashtable
        End If

        If cboInstrumentationName.Items.Count = 0 Then
            Dim objInstrumentation As clsInstrumentation
            Dim objInstrumentations As System.Collections.Generic.List(Of clsInstrumentation)

            Me.cboInstrumentationName.Items.Clear()
            m_objInstrumentationsHash = New Hashtable

            objInstrumentations = clsInstrumentation.GetAllInstrumentations
            For Each objInstrumentation In objInstrumentations
                AddInstrumentationToForm(objInstrumentation)
            Next
        End If

        If cboHymnTuneName.Items.Count = 0 Then
            Dim objHymnTuneName As clsHymnTuneName
            Dim objHymnTuneNames As System.Collections.Generic.List(Of clsHymnTuneName)

            Me.cboHymnTuneName.Items.Clear()
            m_objHymnTuneNamesHash = New Hashtable

            objHymnTuneNames = clsHymnTuneName.GetAllHymnTuneNames
            For Each objHymnTuneName In objHymnTuneNames
                AddHymnTuneNameToForm(objHymnTuneName)
            Next

            Me.cboHymnTuneName.Items.Add(MyGlobals.NONE_STRING)
        End If
    End Sub

    Protected Overrides Sub SetFocusToFirstDetailControlForEdit()
        cboBook.Focus()
    End Sub

    Protected Overrides Function DetailControlsHaveDifferentDataThanExistingData(ByVal lstvwExistingItem As Windows.Forms.ListViewItem) As Boolean
        Dim lobjSavedWork As clsWork
        Dim lblnReturnValue As Boolean = False

        lobjSavedWork = CType(lstvwExistingItem.Tag, clsWork)

        Dim objComposer As clsComposer
        Select Case cboComposerName.Text.ToUpper.Trim
            Case ""
                objComposer = Nothing
            Case Else
                objComposer = CType(MyGlobals.GetItemFromHashWithStringKey(cboComposerName.Text.ToUpper.Trim, m_objComposersHash), clsComposer)
                If objComposer Is Nothing Then
                    objComposer = New clsComposer(cboComposerName.Text.Trim)
                End If
        End Select

        Dim objInstrumentation As clsInstrumentation
        Select Case cboInstrumentationName.Text.ToUpper.Trim
            Case ""
                objInstrumentation = Nothing
            Case Else
                objInstrumentation = CType(MyGlobals.GetItemFromHashWithStringKey(cboInstrumentationName.Text.ToUpper.Trim, m_objInstrumentationsHash), clsInstrumentation)
                If objInstrumentation Is Nothing Then
                    objInstrumentation = New clsInstrumentation(cboInstrumentationName.Text.Trim)
                End If
        End Select

        Dim objHymnTuneName As clsHymnTuneName
        Select Case cboHymnTuneName.Text.ToUpper.Trim
            Case MyGlobals.NONE_STRING.ToUpper, ""
                objHymnTuneName = Nothing
            Case Else
                objHymnTuneName = CType(MyGlobals.GetItemFromHashWithStringKey(cboHymnTuneName.Text.ToUpper.Trim, m_objHymnTuneNamesHash), clsHymnTuneName)
                If objHymnTuneName Is Nothing Then
                    objHymnTuneName = New clsHymnTuneName(cboHymnTuneName.Text.Trim)
                End If
        End Select

        mobjDetailWork.Book = CType(cboBook.SelectedItem, clsBook)
        mobjDetailWork.PageNumberAsString = txtPageNumber.Text
        mobjDetailWork.WorkName = txtWorkName.Text
        mobjDetailWork.Composer = objComposer
        mobjDetailWork.Instrumentation = objInstrumentation
        mobjDetailWork.OpusInfo = txtOpusInfo.Text
        mobjDetailWork.HymnTuneName = objHymnTuneName

        If lobjSavedWork.StateIsIdentical(mobjDetailWork) Then
            Return False
        Else
            Return True
        End If
    End Function

    Protected Overrides Function DetailControlsHaveSignificantData() As Boolean
        If txtWorkName.Text.Trim.Length > 0 _
        OrElse txtPageNumber.Text.Trim.Length > 0 _
        OrElse txtOpusInfo.Text.Trim.Length > 0 Then
            'Pre-load composer from book, if composer hasn't already been set
            If cboComposerName.Text.Trim.Length = 0 Then
                Dim objBook As clsBook
                objBook = CType(cboBook.SelectedItem, clsBook)
                If objBook.Composer Is Nothing Then
                    'Do nothing - this is collection
                Else
                    cboComposerName.Text = objBook.Composer.ComposerName
                End If
            End If

            'Pre-load instrumentation from book, if instrumentation hasn't already been set
            If cboInstrumentationName.Text.Trim.Length = 0 Then
                Dim objBook As clsBook
                objBook = CType(cboBook.SelectedItem, clsBook)
                If objBook.Instrumentation Is Nothing Then
                    'Do nothing - this is collection
                Else
                    cboInstrumentationName.Text = objBook.Instrumentation.InstrumentationName
                End If
            End If

            Return True
        End If

        Return False
    End Function

    Protected Overrides Sub EmptyOutDetailControls()
        InitializeDetailControls()
        txtWorkName.Text = ""
        txtPageNumber.Text = ""
        cboComposerName.Text = ""
        cboInstrumentationName.Text = ""
        txtOpusInfo.Text = ""
        cboHymnTuneName.Text = ""

        mobjDetailWork = New clsWork
    End Sub

    Protected Overrides Function LoadExistingDataToDetailControls(ByVal lstvwExistingItem As Windows.Forms.ListViewItem) As Boolean
        Dim lobjWork As clsWork
        Dim lblnReturnValue As Boolean = False
        lobjWork = CType(lstvwExistingItem.Tag, clsWork)

        'MessageBox.Show(lobjWork.Book.ToString)
        'cboBook.SelectedText = lobjWork.Book.ToString
        cboBook.Text = lobjWork.Book.ToString
        txtPageNumber.Text = lobjWork.PageNumberAsString
        txtWorkName.Text = lobjWork.WorkName

        If lobjWork.Composer Is Nothing Then
            cboComposerName.Text = ""
        Else
            cboComposerName.Text = lobjWork.Composer.ComposerName
        End If

        If lobjWork.Instrumentation Is Nothing Then
            cboInstrumentationName.Text = ""
        Else
            cboInstrumentationName.Text = lobjWork.Instrumentation.InstrumentationName
        End If

        txtOpusInfo.Text = lobjWork.OpusInfo

        If lobjWork.HymnTuneName Is Nothing Then
            cboHymnTuneName.Text = MyGlobals.NONE_STRING
        Else
            cboHymnTuneName.Text = lobjWork.HymnTuneName.HymnTuneName
        End If

        mobjDetailWork = CType(lobjWork.Clone(), clsWork)
        Return True
    End Function

    Protected Overrides Function ConfirmOKToDeleteExistingItem(ByVal lstvwItemToDelete As Windows.Forms.ListViewItem) As Boolean
        Dim lobjWork As clsWork
        Dim lstrReferencedBy As String = ""

        lobjWork = CType(lstvwItemToDelete.Tag, clsWork)

        If Not lobjWork.OKToDelete(lstrReferencedBy) Then
            MessageBox.Show("Can't delete work: " + lobjWork.ToString + ".  Currently used by " + lstrReferencedBy + ".", "Unable to delete", MessageBoxButtons.OK, MessageBoxIcon.Exclamation)
            Return False
        End If

        Dim ldrDialogResult As DialogResult = MessageBox.Show("Are you sure you want to delete work: " + lobjWork.ToString + "?", "Delete confirmation", MessageBoxButtons.YesNo, MessageBoxIcon.Question, MessageBoxDefaultButton.Button2)
        If ldrDialogResult = Windows.Forms.DialogResult.No Then
            Return False
        End If

        Return True
    End Function

    Protected Overrides Function DeleteExistingItem(ByVal lstvwItemToDelete As Windows.Forms.ListViewItem) As Boolean
        Dim lobjWork As clsWork
        lobjWork = CType(lstvwItemToDelete.Tag, clsWork)

        Return lobjWork.Delete()
    End Function

    Protected Overrides Function SaveNewItem() As Boolean
        Dim lstrErrorString As String = ""
        Dim lblnAddedNewComposer As Boolean
        Dim lblnAddedNewInstrumentation As Boolean
        Dim lblnAddedNewHymnTuneName As Boolean

        lblnAddedNewComposer = False
        lblnAddedNewInstrumentation = False
        lblnAddedNewHymnTuneName = False

        Dim objComposer As clsComposer
        Select Case cboComposerName.Text.ToUpper.Trim
            Case ""
                objComposer = Nothing
            Case Else
                objComposer = CType(MyGlobals.GetItemFromHashWithStringKey(cboComposerName.Text.ToUpper.Trim, m_objComposersHash), clsComposer)
                If objComposer Is Nothing Then
                    objComposer = New clsComposer(cboComposerName.Text.Trim)
                    lblnAddedNewComposer = True
                End If
        End Select

        Dim objInstrumentation As clsInstrumentation
        Select Case cboInstrumentationName.Text.ToUpper.Trim
            Case ""
                objInstrumentation = Nothing
            Case Else
                objInstrumentation = CType(MyGlobals.GetItemFromHashWithStringKey(cboInstrumentationName.Text.ToUpper.Trim, m_objInstrumentationsHash), clsInstrumentation)
                If objInstrumentation Is Nothing Then
                    objInstrumentation = New clsInstrumentation(cboInstrumentationName.Text.Trim)
                    lblnAddedNewInstrumentation = True
                End If
        End Select

        Dim objHymnTuneName As clsHymnTuneName
        Select Case cboHymnTuneName.Text.ToUpper.Trim
            Case MyGlobals.NONE_STRING.ToUpper, ""
                objHymnTuneName = Nothing
            Case Else
                objHymnTuneName = CType(MyGlobals.GetItemFromHashWithStringKey(cboHymnTuneName.Text.ToUpper.Trim, m_objHymnTuneNamesHash), clsHymnTuneName)
                If objHymnTuneName Is Nothing Then
                    objHymnTuneName = New clsHymnTuneName(cboHymnTuneName.Text.Trim)
                    lblnAddedNewHymnTuneName = True
                End If
        End Select

        mobjDetailWork.Book = CType(cboBook.SelectedItem, clsBook)
        mobjDetailWork.PageNumberAsString = txtPageNumber.Text
        mobjDetailWork.WorkName = txtWorkName.Text
        mobjDetailWork.Composer = objComposer
        mobjDetailWork.Instrumentation = objInstrumentation
        mobjDetailWork.OpusInfo = txtOpusInfo.Text
        mobjDetailWork.HymnTuneName = objHymnTuneName

        If Not mobjDetailWork.Validate(lstrErrorString) Then
            MessageBox.Show(lstrErrorString, "Edit Error", MessageBoxButtons.OK, MessageBoxIcon.Warning)
            Return False
        End If

        If Not mobjDetailWork.Save() Then
            Return False
        End If

        If lblnAddedNewComposer Then
            AddComposerToForm(objComposer)
        End If

        If lblnAddedNewInstrumentation Then
            AddInstrumentationToForm(objInstrumentation)
        End If

        If lblnAddedNewHymnTuneName Then
            AddHymnTuneNameToForm(objHymnTuneName)
        End If

        Me.ExistingObjectsListItems.Add(ConvertWorkToListViewItem(mobjDetailWork))

        Return True
    End Function

    Protected Overrides Sub UserRequestedToExit()
        Me.Close()
    End Sub

    Protected Overrides Sub EditOrAddStarting()
        CType(Me.ParentForm, frmMain).DisableMenus()
    End Sub
    Protected Overrides Sub EditOrAddCompleted()
        CType(Me.ParentForm, frmMain).EnableMenus()
    End Sub

    Private Function ConvertWorkToListViewItem(ByVal lobjWork As clsWork) As ListViewItem
        Dim lobjItem As ListViewItem

        If lobjWork.Composer Is Nothing Then
            lobjItem = New ListViewItem("")
        Else
            lobjItem = New ListViewItem(lobjWork.Composer.ComposerName)
        End If

        lobjItem.SubItems.Add(lobjWork.WorkName)
        lobjItem.SubItems.Add(lobjWork.Book.ToString)
        lobjItem.SubItems.Add(lobjWork.PageNumberAsString)
        If lobjWork.HymnTuneName Is Nothing Then
            lobjItem.SubItems.Add(MyGlobals.NONE_STRING)
        Else
            lobjItem.SubItems.Add(lobjWork.HymnTuneName.HymnTuneName)
        End If
        lobjItem.SubItems.Add(lobjWork.Instrumentation.InstrumentationName)

        'If lobjWork.HymnTuneName Is Nothing Then
        '    lobjItem.SubItems.Add(MyGlobals.NONE_STRING)
        'Else
        '    lobjItem.SubItems.Add(lobjWork.HymnTuneName.HymnTuneName)
        'End If

        lobjItem.Tag = lobjWork

        Return lobjItem

    End Function

    Protected Overrides Function SaveNewDataForExistingItem(ByVal lstvwExistingItem As Windows.Forms.ListViewItem) As Boolean
        Dim lstrErrorString As String = ""
        Dim lblnAddedNewComposer As Boolean
        Dim lblnAddedNewInstrumentation As Boolean
        Dim lblnAddedNewHymnTuneName As Boolean

        lblnAddedNewComposer = False
        lblnAddedNewInstrumentation = False
        lblnAddedNewHymnTuneName = False

        Dim objComposer As clsComposer
        Select Case cboComposerName.Text.ToUpper.Trim
            Case ""
                objComposer = Nothing
            Case Else
                objComposer = CType(MyGlobals.GetItemFromHashWithStringKey(cboComposerName.Text.ToUpper.Trim, m_objComposersHash), clsComposer)
                If objComposer Is Nothing Then
                    objComposer = New clsComposer(cboComposerName.Text.Trim)
                    lblnAddedNewComposer = True
                End If
        End Select

        Dim objInstrumentation As clsInstrumentation
        Select Case cboInstrumentationName.Text.ToUpper.Trim
            Case ""
                objInstrumentation = Nothing
            Case Else
                objInstrumentation = CType(MyGlobals.GetItemFromHashWithStringKey(cboInstrumentationName.Text.ToUpper.Trim, m_objInstrumentationsHash), clsInstrumentation)
                If objInstrumentation Is Nothing Then
                    objInstrumentation = New clsInstrumentation(cboInstrumentationName.Text.Trim)
                    lblnAddedNewInstrumentation = True
                End If
        End Select

        Dim objHymnTuneName As clsHymnTuneName
        Select Case cboHymnTuneName.Text.ToUpper.Trim
            Case MyGlobals.NONE_STRING.ToUpper, ""
                objHymnTuneName = Nothing
            Case Else
                objHymnTuneName = CType(MyGlobals.GetItemFromHashWithStringKey(cboHymnTuneName.Text.ToUpper.Trim, m_objHymnTuneNamesHash), clsHymnTuneName)
                If objHymnTuneName Is Nothing Then
                    objHymnTuneName = New clsHymnTuneName(cboHymnTuneName.Text.Trim)
                    lblnAddedNewHymnTuneName = True
                End If
        End Select


        mobjDetailWork.Book = CType(cboBook.SelectedItem, clsBook)
        mobjDetailWork.PageNumberAsString = txtPageNumber.Text
        mobjDetailWork.WorkName = txtWorkName.Text
        mobjDetailWork.Composer = objComposer
        mobjDetailWork.Instrumentation = objInstrumentation
        mobjDetailWork.OpusInfo = txtOpusInfo.Text
        mobjDetailWork.HymnTuneName = objHymnTuneName

        If Not mobjDetailWork.Validate(lstrErrorString) Then
            MessageBox.Show(lstrErrorString, "Edit Error", MessageBoxButtons.OK, MessageBoxIcon.Warning)
            Return False
        End If

        If Not mobjDetailWork.Save() Then
            Return False
        End If

        If lblnAddedNewComposer Then
            AddComposerToForm(objComposer)
        End If

        If lblnAddedNewInstrumentation Then
            AddInstrumentationToForm(objInstrumentation)
        End If

        If lblnAddedNewHymnTuneName Then
            AddHymnTuneNameToForm(objHymnTuneName)
        End If

        Me.ExistingObjectsListItems.Remove(lstvwExistingItem)
        Me.ExistingObjectsListItems.Add(ConvertWorkToListViewItem(mobjDetailWork))

        Return True
    End Function

    Private Sub txtWorkName_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles txtWorkName.TextChanged
        MyBase.DetailDataHasChanged()
    End Sub

    Private Sub cboComposerName_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cboComposerName.TextChanged
        MyBase.DetailDataHasChanged()
    End Sub

    Private Sub cboInstrumentationName_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cboInstrumentationName.TextChanged
        MyBase.DetailDataHasChanged()
    End Sub

    Private Sub cboHymnTuneName_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cboHymnTuneName.TextChanged
        MyBase.DetailDataHasChanged()
    End Sub

    Private Sub txtPageNumber_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles txtPageNumber.TextChanged
        MyBase.DetailDataHasChanged()
    End Sub

    Private Sub txtOpusInfo_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles txtOpusInfo.TextChanged
        MyBase.DetailDataHasChanged()
    End Sub

    Private Sub cboBook_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cboBook.SelectedIndexChanged
        MyBase.DetailDataHasChanged()
    End Sub

    Private Sub txtPageNumber_KeyPress(ByVal sender As System.Object, ByVal e As Windows.Forms.KeyPressEventArgs) Handles txtPageNumber.KeyPress
        If Not MyGlobals.AllowKeypressInNumericTextBox(e.KeyChar) Then
            e.Handled = True
        End If
    End Sub

    Protected Sub AddComposerToForm(ByVal objComposer As clsComposer)
        Me.cboComposerName.Items.Add(objComposer.ComposerName)
        m_objComposersHash.Add(objComposer.ComposerName.ToUpper, objComposer)
    End Sub

    Protected Sub AddInstrumentationToForm(ByVal objInstrumentation As clsInstrumentation)
        Me.cboInstrumentationName.Items.Add(objInstrumentation.InstrumentationName)
        m_objInstrumentationsHash.Add(objInstrumentation.InstrumentationName.ToUpper, objInstrumentation)
    End Sub

    Protected Sub AddHymnTuneNameToForm(ByVal objHymnTuneName As clsHymnTuneName)
        Me.cboHymnTuneName.Items.Add(objHymnTuneName.HymnTuneName)
        m_objHymnTuneNamesHash.Add(objHymnTuneName.HymnTuneName.ToUpper, objHymnTuneName)
    End Sub

End Class