I am developing one vb application. In that I have one list box. I want to add different types of Items. Like Different Colored and differently aligned text(Like one item item is right aligned and one more is left aligned). Can you please tell me how can i do the same.
Thanks.
This is how I did it in one of my projects (the original code is in c#):
Public Class ColoringStepCommandListBox
Inherits CommandListBox
Const ItemHeight As Integer = 20
Public Sub New()
listBox.ItemHeight = ItemHeight
listBox.DrawMode = DrawMode.OwnerDrawFixed
End Sub
Protected Overrides Sub OnDrawItem(sender As Object, e As DrawItemEventArgs)
Const textFormatFlags__1 As TextFormatFlags = TextFormatFlags.EndEllipsis Or TextFormatFlags.PreserveGraphicsClipping Or TextFormatFlags.VerticalCenter
Const colorRectangleWidth As Integer = 100, textLeft As Integer = 110
If e.Index >= 0 Then
'Cast the listbox item to your custom type (ColoringStep in my example).
Dim coloringStep = TryCast(listBox.Items(e.Index), ColoringStep)
e.DrawBackground()
'Do custom coloring and rendering, draw icons etc.
Dim colorRect = New Rectangle(2, e.Bounds.Top + 2, colorRectangleWidth, ItemHeight - 5)
Dim innerRect = New Rectangle(colorRect.Left + 1, colorRect.Top + 1, colorRect.Width - 1, colorRect.Height - 1)
e.Graphics.DrawRectangle(Pens.Black, colorRect)
DrawingHelper.DrawGradient(coloringStep, e.Graphics, innerRect, LinearGradientMode.Horizontal)
'Draw the text (this does not happen automatically any more with owner draw modes).
Dim textRect = New Rectangle(textLeft, e.Bounds.Top, e.Bounds.Width - textLeft, e.Bounds.Height)
TextRenderer.DrawText(e.Graphics, coloringStep.ToString(), e.Font, textRect, e.ForeColor, textFormatFlags__1)
e.DrawFocusRectangle()
End If
End Sub
End Class
I got simple solution for this. Below is the code
Private Sub ListBox1_DrawItem(ByVal sender As Object, ByVal e As System.Windows.Forms.DrawItemEventArgs) Handles ListBox1.DrawItem
e.DrawBackground()
Dim textFont As New Font(e.Font.FontFamily, e.Font.Size * 4)
e.Graphics.DrawString(ListBox1.Items(e.Index).ToString(), textFont, New SolidBrush(Color.BlueViolet), RectangleF.op_Implicit(e.Bounds))
e.DrawFocusRectangle()
End Sub
Private Sub listBox1_MeasureItem(ByVal sender As Object, ByVal e As System.Windows.Forms.MeasureItemEventArgs) Handles ListBox1.MeasureItem
e.ItemHeight = e.ItemHeight * 4
End Sub
You can add extra code inside ListBox1_DrawItem method to customize Items
