Hey,
I created a custom datagridview column for a progressbar and included customizable color properties but I can't get them to work right. After compiling, the properties show up correctly in the Edit Columns popup editor, but changing the values has no effect.
The designer generated code shows the original values and manually changing them there has the desired effect(I know you're not supposed to, just testing). Here is the code for the column even though I don't think the issue is stemming from any coding errors there.
Imports System.Drawing
Imports System.ComponentModel
Imports System.Drawing.Drawing2D
'Column class
Public Class DataGridViewProgressColumn
Inherits DataGridViewImageColumn
Dim pShineColor As Color = Color.SkyBlue
Dim pBarColor As Color = Color.SteelBlue
Dim pBarBGColor As Color = Color.FromArgb(190, 190, 190)
Sub redrawColumn()
If Me.DataGridView IsNot Nothing Then
Me.DataGridView.InvalidateColumn(Me.Index)
End If
End Sub
Public Property BarShineColor() As Color
Get
Return pShineColor
End Get
Set(ByVal value As Color)
pShineColor = value
redrawColumn()
End Set
End Property
Public Property BarBGColor() As Color
Get
Return pBarBGColor
End Get
Set(ByVal value As Color)
pBarBGColor = value
redrawColumn()
End Set
End Property
Public Property BarColor() As Color
Get
Return pBarColor
End Get
Set(ByVal value As Color)
pBarColor = value
redrawColumn()
End Set
End Property
Public Sub New()
Me.CellTemplate = New DataGridViewProgressCell
End Sub
End Class
'Cell class
Public Class DataGridViewProgressCell
Inherits DataGridViewImageCell
Sub New()
ValueType = Type.GetType("Integer")
Value = -1
End Sub
Protected Overrides Function GetFormattedValue(ByVal value As Object, ByVal rowIndex As Integer, ByRef cellStyle As DataGridViewCellStyle, ByVal valueTypeConverter As TypeConverter, ByVal formattedValueTypeConverter As TypeConverter, ByVal context As DataGridViewDataErrorContexts) As Object
Static emptyImage As Bitmap = New Bitmap(1, 1, System.Drawing.Imaging.PixelFormat.Format32bppArgb)
GetFormattedValue = emptyImage
End Function
Protected Overrides Sub Paint(ByVal g As System.Drawing.Graphics, ByVal clipBounds As System.Drawing.Rectangle, ByVal cellBounds As System.Drawing.Rectangle, ByVal rowIndex As Integer, ByVal cellState As System.Windows.Forms.DataGridViewElementStates, ByVal value As Object, ByVal formattedValue As Object, ByVal errorText As String, ByVal cellStyle As System.Windows.Forms.DataGridViewCellStyle, ByVal advancedBorderStyle As System.Windows.Forms.DataGridViewAdvancedBorderStyle, ByVal paintParts As System.Windows.Forms.DataGridViewPaintParts)
MyBase.Paint(g, clipBounds, cellBounds, rowIndex, cellState, value, formattedValue, errorText, cellStyle, advancedBorderStyle, paintParts)
Dim tmpColumn As DataGridViewProgressColumn = CType(Me.DataGridView.Columns(Me.ColumnIndex), DataGridViewProgressColumn)
Dim progressVal As Integer = Math.Min(value, 100)
Dim sFormat As New StringFormat()
Dim brLinear As LinearGradientBrush
sFormat.LineAlignment = StringAlignment.Center
sFormat.Alignment = StringAlignment.Center
sFormat.FormatFlags = StringFormatFlags.NoWrap
If progressVal > -1 Then
'Background
g.FillRectangle(New SolidBrush(tmpColumn.BarBGColor), cellBounds.X + 3, cellBounds.Y + 3, cellBounds.Width - 6, cellBounds.Height - 6)
'Bottom shine
brLinear = New LinearGradientBrush(New Point(0, cellBounds.Bottom), New Point(0, CInt(cellBounds.Y - 3 + cellBounds.Height / 2)), Color.FromArgb(188, 255, 255, 255), Color.FromArgb(0, 255, 255, 255))
g.FillRectangle(brLinear, cellBounds.X + 3, CInt(cellBounds.Y + cellBounds.Height / 2), cellBounds.Width - 6, CInt((cellBounds.Height - 6) / 2))
'Progress meter
g.FillRectangle(New SolidBrush(tmpColumn.BarColor), cellBounds.X + 3, cellBounds.Y + 3, CInt((progressVal / 100 * cellBounds.Width - 6)), cellBounds.Height - 6)
brLinear = New LinearGradientBrush(New Point(0, cellBounds.Bottom), New Point(0, CInt(cellBounds.Y - 3 + cellBounds.Height / 2)), tmpColumn.BarShineColor, Color.FromArgb(0, 255, 255, 255))
g.FillRectangle(brLinear, cellBounds.X + 3, CInt(cellBounds.Y + cellBounds.Height / 2), CInt((progressVal / 100 * cellBounds.Width - 6)), CInt((cellBounds.Height - 6) / 2))
'Top shine
brLinear = New LinearGradientBrush(New Point(0, cellBounds.Y), New Point(0, cellBounds.Bottom), Color.FromArgb(200, 255, 255, 255), Color.FromArgb(0, 255, 255, 255))
g.FillRectangle(brLinear, cellBounds.X + 3, cellBounds.Y + 3, cellBounds.Width - 6, CInt((cellBounds.Height - 6) / 2))
'Border
brLinear = New LinearGradientBrush(New Point(0, cellBounds.Y), New Point(0, cellBounds.Bottom), Color.FromArgb(178, 178, 178), Color.FromArgb(140, 140, 140))
g.DrawLine(New Pen(brLinear), cellBounds.X + 2, cellBounds.Y + 3, cellBounds.X + 2, cellBounds.Bottom - 4)
g.DrawLine(New Pen(brLinear), cellBounds.X + 3, cellBounds.Bottom - 3, cellBounds.Right - 4, cellBounds.Bottom - 3)
g.DrawLine(New Pen(brLinear), cellBounds.Right - 3, cellBounds.Bottom - 4, cellBounds.Right - 3, cellBounds.Top + 3)
g.DrawLine(New Pen(brLinear), cellBounds.Right - 4, cellBounds.Y + 2, cellBounds.X + 3, cellBounds.Y + 2)
'Text
g.DrawString(progressVal & "%", cellStyle.Font, New SolidBrush(Color.FromArgb(70, 255, 255, 255)), New Rectangle(cellBounds.X + 1, cellBounds.Y + 1, cellBounds.Width, cellBounds.Height), sFormat)
g.DrawString(progressVal & "%", cellStyle.Font, New SolidBrush(Color.FromArgb(70, 255, 255, 255)), New Rectangle(cellBounds.X - 1, cellBounds.Y + 1, cellBounds.Width, cellBounds.Height), sFormat)
g.DrawString(progressVal & "%", cellStyle.Font, New SolidBrush(Color.FromArgb(70, 255, 255, 255)), New Rectangle(cellBounds.X + 1, cellBounds.Y - 1, cellBounds.Width, cellBounds.Height), sFormat)
g.DrawString(progressVal & "%", cellStyle.Font, New SolidBrush(Color.FromArgb(70, 255, 255, 255)), New Rectangle(cellBounds.X - 1, cellBounds.Y - 1, cellBounds.Width, cellBounds.Height), sFormat)
g.DrawString(progressVal & "%", cellStyle.Font, New SolidBrush(Color.Black), cellBounds, sFormat)
End If
End Sub
End ClassI know it's not really formatted or commented well but I really don't think it's a code issue there. Thanks in advance for anyone who has any ideas!