TeamVision

Imports System
Imports System.ComponentModel
Imports System.Runtime.CompilerServices
Imports System.Windows.Forms
Imports System.Windows.Forms.VisualStyles

Namespace Gui.Components

    <ToolboxItem(False)> _
    Public Class BaseStyledPanel
        Inherits ContainerControl
        Private Shared renderer As New ToolStripProfessionalRenderer()

        Public Event ThemeChanged As EventHandler

        Public Sub New()
            MyBase.SetStyle(ControlStyles.AllPaintingInWmPaint, True)
            MyBase.SetStyle(ControlStyles.OptimizedDoubleBuffer, True)
            MyBase.SetStyle(ControlStyles.ResizeRedraw, True)
            MyBase.SetStyle(ControlStyles.UserPaint, True)
        End Sub

        Protected Overrides Sub OnSystemColorsChanged(ByVal e As System.EventArgs)
            MyBase.OnSystemColorsChanged(e)
            Me.UpdateRenderer()
            MyBase.Invalidate()
        End Sub

        Protected Overridable Sub OnThemeChanged(ByVal e As System.EventArgs)
            If Me.ThemeChangedEvent IsNot Nothing Then
                RaiseEvent ThemeChanged(Me, e)
            End If
        End Sub

        Private Sub UpdateRenderer()
            If (Not Me.UseThemes) Then
                renderer.ColorTable.UseSystemColors = True
            Else
                renderer.ColorTable.UseSystemColors = False
            End If
        End Sub

        <Browsable(False)> _
        Public ReadOnly Property ToolStripRenderer() As ToolStripProfessionalRenderer
            Get
                Return renderer
            End Get
        End Property

        <DefaultValue(True), Browsable(False)> _
        Public ReadOnly Property UseThemes() As Boolean
            Get
                Return ((VisualStyleRenderer.IsSupported AndAlso VisualStyleInformation.IsSupportedByOS) AndAlso Application.RenderWithVisualStyles)
            End Get
        End Property
    End Class
End Namespace