我正在嘗試開發一個自定義組合框(位于工具條中),其中的專案是 5 種字體樣式,我將按它們的外觀顯示。
問題:我無法設定每個專案的大小。該MeasureItem事件不火,我無法找出原因。
所以它看起來像這樣:

不遠但不是我的節奏!^^
這是我的代碼:
Public CorpusFontStyleTitre1 As Font = New Font(New FontFamily("Lato"), 18, FontStyle.Bold, 3)
Public CorpusFontStyleTitre2 As Font = New Font(New FontFamily("Lato"), 16, FontStyle.Underline Or FontStyle.Bold, 3)
Public CorpusFontStyleTitre3 As Font = New Font(New FontFamily("Lato"), 14, FontStyle.Underline Or FontStyle.Bold, 3)
Public CorpusFontStyleTitre4 As Font = New Font(New FontFamily("Lato"), 12, FontStyle.Underline, 3)
Public CorpusFontStyleCorpsdeTexte As Font = New Font(New FontFamily("Lato"), 12, FontStyle.Regular, 3)
Public Structure CorpusFontStyleItem
Dim strTextStyleName As String
Dim fontTextStyle As Font
Public Overrides Function ToString() As String
Return strTextStyleName
End Function
End Structure
Private Sub frmCorpusManagement_Load(sender As Object, e As EventArgs) Handles MyBase.Load
LoadcmbFontStyle()
cmbFontStyle.ComboBox.DrawMode = DrawMode.OwnerDrawFixed
AddHandler cmbFontStyle.ComboBox.DrawItem, AddressOf cmbFontStyle_DrawItem
AddHandler cmbFontStyle.ComboBox.MeasureItem, AddressOf cmbFontStyle_MeasureItem
End Sub
Private Sub cmbFontStyle_MeasureItem(ByVal sender As Object, ByVal e As MeasureItemEventArgs)
Select Case e.Index
Case "1"
e.ItemHeight = 50
Case "2"
e.ItemHeight = 40
Case "3"
e.ItemHeight = 30
Case "4"
e.ItemHeight = 20
Case "5"
e.ItemHeight = 10
End Select
End Sub
Private Sub cmbFontStyle_DrawItem(ByVal sender As Object, ByVal e As DrawItemEventArgs)
e.DrawBackground()
Dim myItem As CorpusFontStyleItem = DirectCast(cmbFontStyle.Items(e.Index), CorpusFontStyleItem)
e.Graphics.DrawString(myItem.strTextStyleName, myItem.fontTextStyle, New SolidBrush(Color.Black), e.Bounds)
e.DrawFocusRectangle()
End Sub
Private Sub LoadcmbFontStyle()
Dim itemCorpusFontStyleTitre1 As New CorpusFontStyleItem With {.strTextStyleName = "Titre 1", .fontTextStyle = CorpusFontStyleTitre1}
Dim itemCorpusFontStyleTitre2 As New CorpusFontStyleItem With {.strTextStyleName = "Titre 2", .fontTextStyle = CorpusFontStyleTitre2}
Dim itemCorpusFontStyleTitre3 As New CorpusFontStyleItem With {.strTextStyleName = "Titre 3", .fontTextStyle = CorpusFontStyleTitre3}
Dim itemCorpusFontStyleTitre4 As New CorpusFontStyleItem With {.strTextStyleName = "Titre 4", .fontTextStyle = CorpusFontStyleTitre4}
Dim itemCorpusFontStyleCorps As New CorpusFontStyleItem With {.strTextStyleName = "Corps de Texte", .fontTextStyle = CorpusFontStyleCorpsdeTexte}
cmbFontStyle.Items.Add(itemCorpusFontStyleTitre1)
cmbFontStyle.Items.Add(itemCorpusFontStyleTitre2)
cmbFontStyle.Items.Add(itemCorpusFontStyleTitre3)
cmbFontStyle.Items.Add(itemCorpusFontStyleTitre4)
cmbFontStyle.Items.Add(itemCorpusFontStyleCorps)
End Sub
uj5u.com熱心網友回復:
您使用了錯誤的繪圖模式。改成這樣:
cmbFontStyle.ComboBox.DrawMode = DrawMode.OwnerDrawVariable
此外,Select Case e.Index是一個整數,而不是一個字串。它是從零開始的,因此您不是在測量第一項。將其更改為:
Select Case e.Index
Case 0
e.ItemHeight = 50
Case 1
e.ItemHeight = 40
您應該嘗試實際測量字體高度,而不是猜測數字。
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