Imports System.Windows.Forms

Public Class frmMain
    Private m_frmEditComposer As frmEditComposer
    Private m_frmEditInstrumentation As frmEditInstrumentation
    Private m_frmEditPublisher As frmEditPublisher
    Private m_frmEditHymnal As frmEditHymnal
    Private m_frmEditBook As frmEditBook
    Private m_frmEditHymnTuneName As frmEditHymnTuneName
    Private m_frmEditHymn As frmEditHymn
    Private m_frmEditWork As frmEditWork

    Private Function OpenDatabaseConnection() As Boolean
        Try
            MyGlobals.g_objDatabaseLayer = New clsDatabaseLayer
            Return MyGlobals.g_objDatabaseLayer.OpenDatabaseConnection()
        Catch
            Return False
        End Try
    End Function

    Private Function CloseDatabaseConnection() As Boolean
        Try
            Return MyGlobals.g_objDatabaseLayer.CloseDatabaseConnection()
        Catch
            Return False
        End Try
    End Function

    Private Sub frmMain_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Load
        If Not OpenDatabaseConnection() Then
            MessageBox.Show("Error connecting to database", "Database error", MessageBoxButtons.OK, MessageBoxIcon.Error)
            Me.Close()
        End If

    End Sub

    Public Sub DisableMenus()
        mnuFile.Enabled = False
        mnuEdit.Enabled = False
    End Sub

    Public Sub EnableMenus()
        mnuFile.Enabled = True
        mnuEdit.Enabled = True
    End Sub

    Private Sub mnuEditComposer_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mnuEditComposer.Click
        Me.Cursor = System.Windows.Forms.Cursors.WaitCursor
        CloseAllEditWindows()
        m_frmEditComposer = New frmEditComposer
        m_frmEditComposer.MdiParent = Me
        m_frmEditComposer.Show()
        Me.Cursor = System.Windows.Forms.Cursors.Default
    End Sub

    Private Sub mnuEditPublisher_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mnuEditPublisher.Click
        Me.Cursor = System.Windows.Forms.Cursors.WaitCursor
        CloseAllEditWindows()
        If m_frmEditPublisher Is Nothing OrElse m_frmEditPublisher.IsDisposed Then
            m_frmEditPublisher = New frmEditPublisher
            m_frmEditPublisher.MdiParent = Me
            m_frmEditPublisher.Show()
        Else
            m_frmEditPublisher.Activate()
        End If
        Me.Cursor = System.Windows.Forms.Cursors.Default
    End Sub

    Private Sub mnuEditHymnal_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mnuEditHymnal.Click
        Me.Cursor = System.Windows.Forms.Cursors.WaitCursor
        CloseAllEditWindows()
        If m_frmEditHymnal Is Nothing OrElse m_frmEditHymnal.IsDisposed Then
            m_frmEditHymnal = New frmEditHymnal
            m_frmEditHymnal.MdiParent = Me
            m_frmEditHymnal.Show()
        Else
            m_frmEditHymnal.Activate()
        End If
        Me.Cursor = System.Windows.Forms.Cursors.Default
    End Sub

    Private Sub mnuEditBook_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mnuEditBook.Click
        Me.Cursor = System.Windows.Forms.Cursors.WaitCursor
        CloseAllEditWindows()
        If m_frmEditBook Is Nothing OrElse m_frmEditBook.IsDisposed Then
            m_frmEditBook = New frmEditBook
            m_frmEditBook.MdiParent = Me
            m_frmEditBook.Show()
        Else
            m_frmEditBook.Activate()
        End If
        Me.Cursor = System.Windows.Forms.Cursors.Default
    End Sub

    Private Sub mnuEditHymnTuneNames_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mnuEditHymnTuneNames.Click
        Me.Cursor = System.Windows.Forms.Cursors.WaitCursor
        CloseAllEditWindows()
        If m_frmEditHymnTuneName Is Nothing OrElse m_frmEditHymnTuneName.IsDisposed Then
            m_frmEditHymnTuneName = New frmEditHymnTuneName
            m_frmEditHymnTuneName.MdiParent = Me
            m_frmEditHymnTuneName.Show()
        Else
            m_frmEditHymnTuneName.Activate()
        End If
        Me.Cursor = System.Windows.Forms.Cursors.Default
    End Sub

    Private Sub mnuEditHymn_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mnuEditHymn.Click
        Me.Cursor = System.Windows.Forms.Cursors.WaitCursor
        CloseAllEditWindows()
        If m_frmEditHymn Is Nothing OrElse m_frmEditHymn.IsDisposed Then
            m_frmEditHymn = New frmEditHymn
            m_frmEditHymn.MdiParent = Me
            m_frmEditHymn.Show()
        Else
            m_frmEditHymn.Activate()
        End If
        Me.Cursor = System.Windows.Forms.Cursors.Default
    End Sub

    Private Sub mnuEditWork_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mnuEditWork.Click
        Me.Cursor = System.Windows.Forms.Cursors.WaitCursor
        CloseAllEditWindows()
        If m_frmEditWork Is Nothing OrElse m_frmEditWork.IsDisposed Then
            m_frmEditWork = New frmEditWork
            m_frmEditWork.MdiParent = Me
            m_frmEditWork.Show()
        Else
            m_frmEditWork.Activate()
        End If
        Me.Cursor = System.Windows.Forms.Cursors.Default
    End Sub

    Private Sub mnuFileExit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mnuFileExit.Click
        Me.Close()
    End Sub

    Private Sub mnuGenerateWebSite_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mnuGenerateWebSite.Click
        Me.Cursor = System.Windows.Forms.Cursors.WaitCursor
        CloseAllEditWindows()
        modGenerateWebSite.GenerateWebSite()
        Me.Cursor = System.Windows.Forms.Cursors.Default
    End Sub

    Private Sub mnuEditInstrumentations_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mnuEditInstrumentations.Click
        Me.Cursor = System.Windows.Forms.Cursors.WaitCursor
        CloseAllEditWindows()
        m_frmEditInstrumentation = New frmEditInstrumentation
        m_frmEditInstrumentation.MdiParent = Me
        m_frmEditInstrumentation.Show()
        Me.Cursor = System.Windows.Forms.Cursors.Default
    End Sub

    Private Sub CloseAllEditWindows()
        CloseWindow(m_frmEditBook)
        CloseWindow(m_frmEditComposer)
        CloseWindow(m_frmEditHymn)
        CloseWindow(m_frmEditHymnal)
        CloseWindow(m_frmEditHymnTuneName)
        CloseWindow(m_frmEditInstrumentation)
        CloseWindow(m_frmEditPublisher)
        CloseWindow(m_frmEditWork)
    End Sub

    Private Sub CloseWindow(ByVal objWindow As System.Windows.Forms.Form)
        If objWindow Is Nothing OrElse objWindow.IsDisposed Then
        Else
            objWindow.Close()
        End If
    End Sub

End Class