Supprimer des objets graphique dessiné

**megamario** · 28/06/2018, 15h54

Bonjour à tous,

Actuellement je m’amuse, si je puis dire, à créer des objets graphique un peu plus évolué dans VB.

Le but étant d'avoir un label plus joli certes, mais j'ai plusieurs zone avec un nombre de label variant suivant la configuration du système sur lequel mon logiciel sera connecté.

Voila ce que j'ai fait pour faire mon label:

Il y a encore pas mal d’amélioration bien-sur et à le nettoyer car j'ai créé des paramètres qui existe déjà de base avec le Usercontrol.
Je n'est pas hérité du label, mais du usercontrol car part le dessin je peux créer une ombre au texte. Je m'en sert pour alerté l'utilisateur par exemple sur une information qui ne convient pas.

Voila mon label:
Nom : Label1.png
Affichages : 124
Taille : 1,7 Ko

Nom : Label1.png
Affichages : 124
Taille : 1,7 Ko

Pour ce label j'ai créer une classe herité donc de usercontrol. (RoundedLabel)

Et j'ai recréé un control (classe MultiRoundLabel) qui appel par défaut un RoundedLabel, mais peut en appeler jusqu’à 4 au final (j'ai pas encore mis de borne).

Voila avec 4 roundedlabel:
Nom : Label4.png
Affichages : 131
Taille : 2,8 Ko

Nom : Label4.png
Affichages : 131
Taille : 2,8 Ko

Mais si je remet 2 RoundedLabel, j'ai bien le texte qui est enlevé, mais pas l'image du rectangle avec arrondie.
Nom : label2.png
Affichages : 115
Taille : 2,7 Ko

Nom : label2.png
Affichages : 115
Taille : 2,7 Ko

L'utilisateur peut changer de système à interroger sans fermer le logiciel. Donc il faut vraiment que la suppression soit sur tout l'objet effacé

Voici la classe RoundedLabel:

Code :

Sélectionner tout - Visualiser dans une fenêtre à part

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Public Class RoundedLabel : Inherits UserControl
 
    Public _FillBrush As Brush '= Brushes.White
    Public _BorderPen As Pen '= Pens.Black
    Private _Radius As Single = 20
    Private _Text As String
    Private _TextColor As Brush
    Private _TextShadowColor As Brush
    Private _TextFont As Font
    Private _Shadow As Boolean
    Private _Name As String
    Private _Visible As Boolean
    Private saveGraphic As GraphicsState = Nothing
    Private ClearGraph As Boolean = False
 
    Public Property m_Name() As String
        Get
            Return _Name
        End Get
        Set(value As String)
            _Name = value
        End Set
    End Property
 
    Public Property m_ShadowColor() As Color
        Get
            Return New Pen(_TextShadowColor).Color
        End Get
        Set(value As Color)
            _TextShadowColor = New SolidBrush(value)
            Refresh()
        End Set
    End Property
    Public Property m_Shadow() As Boolean
        Get
            Return _Shadow
        End Get
        Set(value As Boolean)
            _Shadow = value
            Refresh()
        End Set
    End Property
    Public Property m_TextFont() As Font
        Get
            Return _TextFont
        End Get
        Set(value As Font)
            _TextFont = value
            Refresh()
        End Set
    End Property
    Public Property m_TextColor() As Color
        Get
            Return New Pen(_TextColor).Color
        End Get
        Set(value As Color)
            _TextColor = New SolidBrush(value)
            Refresh()
        End Set
    End Property
 
    Public Property m_FillBrush() As Color
        Get
            Return New Pen(_FillBrush).Color
        End Get
        Set(value As Color)
            _FillBrush = New SolidBrush(value)
            Refresh()
        End Set
    End Property
    Public Property m_BorderPen() As Color '= Pens.Black
        Get
            Return _BorderPen.Color
        End Get
        Set(value As Color)
            _BorderPen = New Pen(value)
            Refresh()
        End Set
    End Property
    Public Property m_Radius As Single
        Get
            Return _Radius
        End Get
        Set(value As Single)
            _Radius = value
            Me.Invalidate()
            Refresh()
        End Set
    End Property
    Public Property m_Text() As String
        Get
            Return _Text
        End Get
        Set(value As String)
            _Text = value
            Refresh()
        End Set
    End Property
    Public Property m_Visible() As Boolean
        Get
            Return _Visible
        End Get
        Set(value As Boolean)
            _Visible = value
            Refresh()
        End Set
    End Property
 
    Public Sub New()
        Dim f As New Font("Microsoft Sans Serif", 14, FontStyle.Bold)
        _TextFont = f
        _TextColor = Brushes.Black
        _TextShadowColor = Brushes.Yellow ' New SolidBrush(Color.FromArgb(187, 187, 185))
        _FillBrush = New SolidBrush(Color.FromArgb(70, 68, 68))
        _BorderPen = Pens.Black
        _Text = "MonText"
        Me.BackColor = Color.Transparent
        _Visible = True
    End Sub
 
    Protected Overrides Sub OnParentChanged(e As System.EventArgs)
        Static oldparent As Control
        If _Name = "DSPMeters22" Then
            Debug.Print("")
        End If
        If _Visible = True Then
            If Me.Parent IsNot Nothing Then
                If oldparent IsNot Nothing Then RemoveHandler oldparent.Paint, AddressOf DrawRoundedRectangle
                AddHandler Me.Parent.Paint, AddressOf DrawRoundedRectangle
                oldparent = Me.Parent
            End If
 
            MyBase.OnParentChanged(e)
        End If
    End Sub
 
    Protected Overrides Sub DestroyHandle()
        If Me.Parent IsNot Nothing Then RemoveHandler Me.Parent.Paint, AddressOf DrawRoundedRectangle
        MyBase.DestroyHandle()
    End Sub
 
    Public Sub DrawRoundedRectangle(sender As Object, e As PaintEventArgs)
        Dim sm As Drawing2D.SmoothingMode = e.Graphics.SmoothingMode 'save the previous smoothing mode
        If IsNothing(saveGraphic) Then
            saveGraphic = e.Graphics.Save
 
        End If
        e.Graphics.SmoothingMode = Drawing2D.SmoothingMode.HighQuality
        Dim rect As Rectangle = Me.Bounds
        rect.Inflate(-1, -1)
        Dim path As Drawing2D.GraphicsPath = GetRoundedRectangle(rect, _Radius)
        If _FillBrush IsNot Nothing Then
            e.Graphics.FillPath(_FillBrush, path)
        End If
        If _BorderPen IsNot Nothing Then
            e.Graphics.DrawPath(_BorderPen, path)
 
        End If
        e.Graphics.SmoothingMode = sm 'restore the previous smoothing mode
    End Sub
    Public Sub ClearGraphic()
        ClearGraph = True
        Refresh()
    End Sub
    Private Function GetRoundedRectangle(rect As Rectangle, radius As Single) As Drawing2D.GraphicsPath
        Dim gp As New Drawing2D.GraphicsPath
        With rect
            gp.AddArc(.X + .Width - radius, .Y, radius, radius, 270, 90)
            gp.AddArc(.X + .Width - radius, .Y + .Height - radius, radius, radius, 0, 90)
            gp.AddArc(.X, .Y + .Height - radius, radius, radius, 90, 90)
            gp.AddArc(.X, .Y, radius, radius, 180, 90)
            gp.CloseFigure()
        End With
        Return gp
    End Function
 
    Protected Overrides Sub OnPaint(pevent As System.Windows.Forms.PaintEventArgs)
        MyBase.OnPaint(pevent)
        If _Name = "DSPMeters22" Then
            Debug.Print("")
        End If
        If ClearGraph Then
            pevent.Graphics.Restore(saveGraphic)
        End If
        If _Visible = True Then
 
 
            Dim G As Graphics = pevent.Graphics
 
 
            Dim m As SizeF = G.MeasureString(_Text, _TextFont)
            Dim x As Single = (Width / 2) - m.Width / 2
            Dim y As Single = (Height / 2) - m.Height / 2
 
            Dim pf As New PointF(x, y)
            Dim pf2 As New PointF(x + 1, y + 1)
            If _Shadow Then
                G.DrawString(_Text, _TextFont, _TextShadowColor, pf2)
            End If
            G.DrawString(_Text, _TextFont, _TextColor, pf)
        Else
            Debug.Print("")
        End If
    End Sub
End Class

La classe MultiRoundLabel

Code :

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Public Class MultiRoundLabel : Inherits UserControl
#Region "variable"
    Public _NbLalel As Integer
    Public _Espace As Integer
    Public _Height As Integer
    Public _MesLabels() As RoundedLabel
    Public _FillBrush As Color '= Brushes.White
    Public _BorderPen As Color '= Pens.Black
    Private _Radius As Single = 20
    Private _Text() As String
    Private _TextColor As Color
    Private _TextShadowColor As Color
    Private _TextFont As Font
    Private _Shadow() As Boolean
 
#End Region
 
#Region "constructeur"
 
    Public Sub New()
 
        Dim f As New Font("Microsoft Sans Serif", 14, FontStyle.Bold)
        _NbLalel = 1
        _Espace = 3
        _TextFont = f
        _Height = 25
        _TextColor = Color.Black
        _TextShadowColor = Color.Yellow ' New SolidBrush(Color.FromArgb(187, 187, 185))
        _FillBrush = Color.FromArgb(70, 68, 68)
        _BorderPen = Color.Black
        ReDim _Text(0)
        _Text(0) = "- - -"
        _Radius = 20
        Me.BackColor = Color.Transparent
        ReDim _MesLabels(0)
        ReDim _Shadow(0)
        _Shadow(0) = False
        _MesLabels(0) = New RoundedLabel
        _MesLabels(0).Width = Me.Width
        _MesLabels(0).Top = 0
        _MesLabels(0).Left = 0
        _MesLabels(0).Height = _Height
        _MesLabels(0).m_Radius = _Radius
        _MesLabels(0).m_Text = _Text(0)
        _MesLabels(0).m_TextColor = _TextColor
        _MesLabels(0).m_TextFont = _TextFont
        _MesLabels(0).m_BorderPen = _BorderPen
        _MesLabels(0).m_FillBrush = _FillBrush
        _MesLabels(0).m_Shadow = _Shadow(0)
        _MesLabels(0).m_ShadowColor = _TextShadowColor
        Me.Controls.Add(_MesLabels(0))
 
 
 
 
    End Sub
 
#End Region
 
#Region "Property"
    Public Property m_Nblabel() As Integer
        Get
            Return _NbLalel
        End Get
        Set(value As Integer)
            Dim i As Integer
            If value <= 0 Then
                value = 0
            End If
            If value < _NbLalel Then
                For i = 0 To UBound(_MesLabels)
                    _MesLabels(i).ClearGraphic()
                    Me.Controls.Remove(_MesLabels(i))
                Next
                ReDim _MesLabels(value - 1)
                ReDim Preserve _Shadow(value - 1)
                ReDim Preserve _Text(value - 1)
            Else
                ReDim Preserve _MesLabels(value - 1)
                ReDim Preserve _Shadow(value - 1)
                ReDim Preserve _Text(value - 1)
            End If
            _NbLalel = value
 
            For i = 0 To UBound(_MesLabels)
                If IsNothing(_MesLabels(i)) Then
                    _MesLabels(i) = New RoundedLabel
                    _MesLabels(i).Width = Me.Width
                    _MesLabels(i).Top = 0
                    _MesLabels(i).Left = 0
                    If i <> 0 Then
                        _MesLabels(i).Top = i * (_Espace + _Height)
                    End If
                    _MesLabels(i).Height = _Height
                    _MesLabels(i).m_Radius = _Radius
                    _MesLabels(i).m_Text = _Text(i)
                    _MesLabels(i).m_TextColor = _TextColor
                    _MesLabels(i).m_TextFont = _TextFont
                    _MesLabels(i).m_BorderPen = _BorderPen
                    _MesLabels(i).m_FillBrush = _FillBrush
                    _MesLabels(i).m_Shadow = _Shadow(i)
                    _MesLabels(i).m_ShadowColor = _TextShadowColor
                    Me.Controls.Add(_MesLabels(i))
                End If
            Next
            Refresh()
        End Set
    End Property
    Public Property m_Espace() As Integer
        Get
            Return _Espace
        End Get
        Set(value As Integer)
            _Espace = value
            Refresh()
        End Set
    End Property
 
    Public Property m_ShadowColor() As Color
        Get
            Return _TextShadowColor
        End Get
        Set(value As Color)
            _TextShadowColor = (value)
            For i As Integer = 0 To UBound(_MesLabels)
                _MesLabels(i).m_ShadowColor = _TextShadowColor
            Next
            Refresh()
        End Set
    End Property
    Public Property m_Shadow() As Boolean()
        Get
            Return _Shadow
        End Get
        Set(value As Boolean())
            _Shadow = value
            For i As Integer = 0 To UBound(_MesLabels)
                _MesLabels(i).m_Shadow = _Shadow(i)
            Next
            Refresh()
        End Set
    End Property
    Public Property m_TextFont() As Font
        Get
            Return _TextFont
        End Get
        Set(value As Font)
            _TextFont = value
            Refresh()
        End Set
    End Property
    Public Property m_TextColor() As Color
        Get
            Return New Pen(_TextColor).Color
        End Get
        Set(value As Color)
            _TextColor = value
            For i As Integer = 0 To UBound(_MesLabels)
                _MesLabels(i).m_TextColor = _TextColor
            Next
            Refresh()
        End Set
    End Property
 
    Public Property m_FillBrush() As Color
        Get
            Return New Pen(_FillBrush).Color
        End Get
        Set(value As Color)
            _FillBrush = value
            For i As Integer = 0 To UBound(_MesLabels)
                _MesLabels(i).m_FillBrush = _FillBrush
            Next
            Refresh()
        End Set
    End Property
    Public Property m_BorderPen() As Color '= Pens.Black
        Get
            Return _BorderPen
        End Get
        Set(value As Color)
            _BorderPen = value
            For i As Integer = 0 To UBound(_MesLabels)
                _MesLabels(i).m_BorderPen = _BorderPen
            Next
            Refresh()
        End Set
    End Property
    Public Property m_Radius As Single
        Get
            Return _Radius
        End Get
        Set(value As Single)
            _Radius = value
            For i As Integer = 0 To UBound(_MesLabels)
                _MesLabels(i).m_Radius = _Radius
            Next
            Me.Invalidate()
            Refresh()
        End Set
    End Property
    Public Property m_Text() As String()
        Get
            Return _Text
        End Get
        Set(value As String())
            _Text = value
            For i As Integer = 0 To UBound(_MesLabels)
                _MesLabels(i).m_Text = _Text(i)
            Next
 
            Refresh()
        End Set
    End Property
 
 
#End Region
#Region "event"
 
    Protected Overrides Sub OnResize(e As System.EventArgs)
        MyBase.OnResize(e)
 
        UpdateParameter()
    End Sub
 
    Protected Overrides Sub OnParentChanged(e As System.EventArgs)
        MyBase.OnParentChanged(e)
 
    End Sub
 
    Private Sub UpdateParameter()
        Dim i As Integer
        For i = 0 To UBound(_MesLabels)
            _MesLabels(i).Width = Me.Width
            _MesLabels(i).Height = _Height
            _MesLabels(i).m_Radius = _Radius
            _MesLabels(i).m_TextColor = _TextColor
            _MesLabels(i).m_TextFont = _TextFont
            _MesLabels(i).m_BorderPen = _BorderPen
            _MesLabels(i).m_FillBrush = _FillBrush
            _MesLabels(i).m_Shadow = _Shadow(i)
            _MesLabels(i).m_ShadowColor = _TextShadowColor
        Next
    End Sub
#End Region
 
 
 
End Class

J'ai essayé avec le graphic.clear(), mais je ne vois pas trop comment l'utiliser dans mon cas, j'ai vu aussi le save et restore, mais la encore je ne dois pas l'utiliser correctement car cela ne fonctionne pas.

Merci de votre aide.

**megamario** · 29/06/2018, 11h41

Bonjour,

J'ai trouvé une solution, je rajoute un panel à chaque ajout de label.
Pour ce faire, j'ajoute le panel à mon MultiRoundLabel et enfin j'ajout le RoundedLabel à mon panel. Ensuite j'affiche ou pas le panel avec la simple commande visible.

Supprimer des objets graphique dessiné

VB.NET

Vue hybride

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