Imports System.Windows.Forms

Public Class BaseQueryForm
    Private mintCurrentQueryBySortColumn As Integer
    Private mintCurrentReportSortColumn As Integer
    Private mobjQueryFormQueryByItemColumnSortRules() As clsGridColumnSortRule
    Private mobjQueryFormReportItemColumnSortRules() As clsGridColumnSortRule

    Private Sub BaseQueryForm_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Load
        If Me.DesignMode Then
            MessageBox.Show("The BaseQueryForm class must be inherited, and contains methods that must be overridden." + vbCrLf + "They have been declared in the base class and will throw NotImplementedException at runtime if not overridden.")
        End If
        lvwQueryByItemsList.Sorting = SortOrder.None
        lvwReportItemsList.Sorting = SortOrder.None
        LoadQueryByItemsList()
        InitializeReportControls()
        Dim lobjQueryByColumnClickEventArgs As New System.Windows.Forms.ColumnClickEventArgs(0)
        lvwQueryByItemsList_ColumnClick(Me, lobjQueryByColumnClickEventArgs)
        Dim lobjReportColumnClickEventArgs As New System.Windows.Forms.ColumnClickEventArgs(0)
        lvwReportItemsList_ColumnClick(Me, lobjReportColumnClickEventArgs)
        fraQueryBy.Height() = fraReport.Top - fraQueryBy.Top - 10
        If fraOtherQueryParms.Controls.Count > 0 Then
            fraOtherQueryParms.Visible = False
            lvwQueryByItemsList.Height = fraQueryBy.Height - 10
        Else
            lvwQueryByItemsList.Height = fraOtherQueryParms.Top - 10
        End If
        lvwReportItemsList.Height = fraReport.Height - 10
    End Sub

    Protected Overridable Sub LoadQueryByItemsList()
        If Not Me.DesignMode Then
            Throw New NotImplementedException
        End If
    End Sub

    Protected Overridable Sub InitializeReportControls()
        If Not Me.DesignMode Then
            Throw New NotImplementedException
        End If
    End Sub

    Protected Overridable Function ReportOnQueryByItem(ByVal lstvwQueryByItem As ListViewItem) As Boolean
        If Not Me.DesignMode Then
            Throw New NotImplementedException
        End If
    End Function

    Protected Overridable Function UserWantsDetailOnResult(ByVal lstvwResultItem As ListViewItem) As Boolean
        If Not Me.DesignMode Then
            Throw New NotImplementedException
        End If
    End Function

    Protected Overridable Sub UserRequestedToExit()
        If Not Me.DesignMode Then
            Throw New NotImplementedException
        End If
    End Sub

    Protected ReadOnly Property QueryByListItems() As ListView.ListViewItemCollection
        Get
            Return lvwQueryByItemsList.Items
        End Get
    End Property

    Protected ReadOnly Property QueryByListColumns() As ListView.ColumnHeaderCollection
        Get
            Return lvwQueryByItemsList.Columns
        End Get
    End Property

    Protected Property MyBaseQueryFormQueryByColumnSortRules() As clsGridColumnSortRule()
        Get
            Return mobjQueryFormQueryByItemColumnSortRules
        End Get
        Set(ByVal iValue As clsGridColumnSortRule())
            mobjQueryFormQueryByItemColumnSortRules = iValue
        End Set
    End Property

    Protected ReadOnly Property ReportListItems() As ListView.ListViewItemCollection
        Get
            Return lvwReportItemsList.Items
        End Get
    End Property

    Protected ReadOnly Property ReportListColumns() As ListView.ColumnHeaderCollection
        Get
            Return lvwReportItemsList.Columns
        End Get
    End Property

    Protected Property MyBaseQueryFormReportColumnSortRules() As clsGridColumnSortRule()
        Get
            Return mobjQueryFormReportItemColumnSortRules
        End Get
        Set(ByVal iValue As clsGridColumnSortRule())
            mobjQueryFormReportItemColumnSortRules = iValue
        End Set
    End Property

    Private Sub btnExit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnExit.Click
        UserRequestedToExit()
    End Sub

    Private Sub lvwQueryByItemsList_ColumnClick(ByVal sender As System.Object, ByVal e As System.Windows.Forms.ColumnClickEventArgs)
        mintCurrentQueryBySortColumn = e.Column
        lvwQueryByItemsList.ListViewItemSorter = New clsGridSorter(e.Column, mobjQueryFormQueryByItemColumnSortRules)
    End Sub

    Private Sub lvwQueryByItemsList_DoubleClick(ByVal sender As System.Object, ByVal e As System.EventArgs)
        DoReportClick()
    End Sub

    Private Sub lvwReportItemsList_ColumnClick(ByVal sender As System.Object, ByVal e As System.Windows.Forms.ColumnClickEventArgs) Handles lvwReportItemsList.ColumnClick
        mintCurrentReportSortColumn = e.Column
        lvwReportItemsList.ListViewItemSorter = New clsGridSorter(e.Column, mobjQueryFormReportItemColumnSortRules)
    End Sub

    Private Sub lvwReportItemsList_DoubleClick(ByVal sender As Object, ByVal e As System.EventArgs) Handles lvwReportItemsList.DoubleClick
        DoUserWantsDetailOnResult()
    End Sub

    Private Sub DoReportClick()
        If lvwQueryByItemsList.SelectedItems.Count = 0 Then
            MessageBox.Show("Must select an item to query by", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error)
            Exit Sub
        End If

        ReportOnQueryByItem(lvwQueryByItemsList.SelectedItems(0))
        'Check if there are results - if so show them
        ' - if not hide them
        If lvwReportItemsList.Items.Count = 0 Then
            lvwReportItemsList.Visible = False
        Else
            lvwReportItemsList.Visible = True
        End If
    End Sub

    Private Sub DoUserWantsDetailOnResult()
        If lvwReportItemsList.SelectedItems.Count = 0 Then
            MessageBox.Show("Must select an item to show details results for", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error)
            Exit Sub
        End If

        UserWantsDetailOnResult(lvwReportItemsList.SelectedItems(0))
    End Sub

End Class