Arbeiten mit unterschiedlichen Farblayout-Systemen
Damit man einen komfortablen Zugriff auf das Farbsystem und die verwendeten Farben hat, erfolgt dies über eine Enum-Auflistung und generischen Klassen.
1. Erstellen von abstrakten Klassen (MustInherit), einmalig
LayoutSystemFactory(Of T, U)
ColorSystemFactory(Of T)
2. Erstellen eines Vertrages (Interface), einmalig
ILayoutSystem(Of T, U)
IColorSystem(Of T)
3. Farbsysteme festlegen, einmalig pro Anwendung
Public Enum ColorMiniLayout
Public Class MiniGrey
Inherits ColorSystemFactory(Of ColorMiniLayout)
Punkte 1-3 als VB-Code-Klasse hinterlegt.
4. Farblayout-System anwenden
' ... Form erstellen
Public Class Form1
Implements IColorSystem(Of ColorMiniLayout)
' ... das erzeugt folgendes Property
Public Property ColorSystem() As ColorSystemFactory(Of ColorMiniLayout) Implements IColorSystem(Of ColorMiniLayout).ColorSystem
Get
Return FARB
End Get
Set(ByVal value As ColorSystemFactory(Of ColorMiniLayout))
FARB = value
If FARB Is Nothing Then FARB = New MiniGrey
End Set
End Property
' ... private Farbfactrory-Variable erzeugen
Private FARB As ColorSystemFactory(Of ColorMiniLayout)
' ... anwenden z.B.
Me.BackColor = Me.FARB.Farbe(ColorMiniLayout.BackGround)
Namespace HTD.FarbSystem
#Region " Interfaces "
''' <summary>
''' das Interface für das Farbsystem
''' </summary>
''' <typeparam name="T">Farbbennung mittels Enum</typeparam>
''' <remarks></remarks>
Public Interface IColorSystem(Of T)
Property ColorSystem() As ColorSystemFactory(Of T)
End Interface
''' <summary>
''' Interface für benanntes Layout-System
''' </summary>
''' <typeparam name="T"></typeparam>
''' <typeparam name="U"></typeparam>
''' <remarks></remarks>
Public Interface ILayoutSystem(Of T, U)
Property LayoutSystem() As LayoutSystemFactory(Of T, U)
End Interface
#End Region
#Region " Abstrakte Klassen "
''' <summary>
''' Festlegung für Zugriff auf ein Layoutsystem
''' </summary>
''' <typeparam name="T"></typeparam>
''' <typeparam name="U"></typeparam>
''' <remarks></remarks>
<Serializable()> Public MustInherit Class LayoutSystemFactory(Of T, U)
Implements IDisposable
Private Values As Dictionary(Of T, U)
Public Sub New()
Values = New Dictionary(Of T, U)
End Sub
''' <summary>
''' benannte Wert des LayoutSystems
''' </summary>
''' <param name="e"></param>
''' <value></value>
''' <returns></returns>
''' <remarks></remarks>
Property Value(ByVal e As T) As U
Get
Return Values(e)
End Get
Set(ByVal value As U)
Values(e) = value
End Set
End Property
#Region " IDisposable Support "
Private disposedValue As Boolean = False ' To detect redundant calls
' IDisposable
Protected Overridable Sub Dispose(ByVal disposing As Boolean)
If Not Me.disposedValue Then
If disposing Then
' TODO: free other state (managed objects).
End If
' TODO: set large fields to null.
End If
Me.disposedValue = True
End Sub
' This code added by Visual Basic to correctly implement the disposable pattern.
Public Sub Dispose() Implements IDisposable.Dispose
' Do not change this code. Put cleanup code in Dispose(ByVal disposing As Boolean) above.
Dispose(True)
GC.SuppressFinalize(Me)
End Sub
#End Region
End Class
''' <summary>
''' Festlegung des Farbsystem mit Zugriff auf die verschiedenen Farben
''' </summary>
''' <typeparam name="T">Eunummerierungs-Bezeichnungen des Farbssystem</typeparam>
''' <remarks></remarks>
<Serializable()> Public MustInherit Class ColorSystemFactory(Of T)
Implements IDisposable
Private Values As Dictionary(Of T, System.Drawing.Color)
Public Sub New()
Values = New Dictionary(Of T, System.Drawing.Color)
End Sub
''' <summary>
''' benannte Farbwerte für das Farbsystem
''' </summary>
''' <param name="e"></param>
''' <value></value>
''' <returns></returns>
''' <remarks></remarks>
Property Farbe(ByVal e As T) As System.Drawing.Color
Get
Return Values(e)
End Get
Set(ByVal value As System.Drawing.Color)
Values(e) = value
End Set
End Property
''' <summary>
''' Ausgabe eines SolidBrush-Objekts des Farbwertes
''' </summary>
''' <param name="e"></param>
''' <returns></returns>
''' <remarks></remarks>
Function GetSolidBrush(ByVal e As T) As Brush
Return New SolidBrush(Me.Farbe(e))
End Function
''' <summary>
''' Ausgabe eines Pen-Objekts des Farbwertes
''' </summary>
''' <param name="e"></param>
''' <param name="width"></param>
''' <returns></returns>
''' <remarks></remarks>
Function GetPen(ByVal e As T, Optional ByVal width As Single = 1) As Pen
Return New Pen(Me.Farbe(e), width)
End Function
#Region " IDisposable Support "
Private disposedValue As Boolean = False ' To detect redundant calls
Protected Overridable Sub Dispose(ByVal disposing As Boolean)
If Not Me.disposedValue Then
If disposing Then
Values = Nothing
End If
' TODO: set large fields to null.
End If
Me.disposedValue = True
End Sub
' This code added by Visual Basic to correctly implement the disposable pattern.
Public Sub Dispose() Implements IDisposable.Dispose
' Do not change this code. Put cleanup code in Dispose(ByVal disposing As Boolean) above.
Dispose(True)
GC.SuppressFinalize(Me)
End Sub
#End Region
End Class
#End Region
End Namespace
Namespace HTD.FarbSystem.Example
''' <summary>
''' Die Farbbezeichnungen für das verwendete Farbsystem
''' </summary>
''' <remarks></remarks>
Public Enum ColorMiniLayout
BackGroundLight
BackGround
HeaderDark
ForeGround
Black
SelectedBackColor
SelectedForeColor
End Enum
''' <summary>
''' Farbsystem Grau mit benannten Farben
''' </summary>
''' <remarks></remarks>
Public Class MiniGrey
Inherits ColorSystemFactory(Of ColorMiniLayout)
Public Sub New()
' Farben festlegen
MyBase.Farbe(ColorMiniLayout.BackGroundLight) = Color.FromArgb(255, 161, 161, 161)
MyBase.Farbe(ColorMiniLayout.BackGround) = Color.FromArgb(255, 134, 134, 134)
MyBase.Farbe(ColorMiniLayout.HeaderDark) = Color.FromArgb(255, 125, 125, 125)
MyBase.Farbe(ColorMiniLayout.ForeGround) = Color.LightGray
MyBase.Farbe(ColorMiniLayout.Black) = Color.Black
MyBase.Farbe(ColorMiniLayout.SelectedForeColor) = Color.Yellow
MyBase.Farbe(ColorMiniLayout.SelectedBackColor) = Color.FromArgb(255, 125, 125, 125)
End Sub
End Class
''' <summary>
''' Farbsystem Blau mit benannten Farben
''' </summary>
''' <remarks></remarks>
Public Class MiniBlue
Inherits ColorSystemFactory(Of ColorMiniLayout)
Public Sub New()
' Farben festlegen
MyBase.Farbe(ColorMiniLayout.BackGroundLight) = Color.LightBlue
MyBase.Farbe(ColorMiniLayout.BackGround) = Color.DarkBlue
MyBase.Farbe(ColorMiniLayout.HeaderDark) = Color.SteelBlue
MyBase.Farbe(ColorMiniLayout.ForeGround) = Color.DarkGray
MyBase.Farbe(ColorMiniLayout.Black) = Color.Black
MyBase.Farbe(ColorMiniLayout.SelectedForeColor) = Color.Yellow
MyBase.Farbe(ColorMiniLayout.SelectedBackColor) = Color.DarkOrange
End Sub
End Class
End Namespace
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