[dba-VB] WinForms: What is the best event for custom drawing ona leftmost cell of DataGridView head

Hi Gustav --

Thank you for your sample code.

I have to simulate hierarchical GridView (just one level) using DataGridView
(I do not use third-party controls - that's my customer requirement).
I do use RowPostPaint event to draw (+) - collpased , and (-) - expanded row
sign on row header cells as well as on top-left cell - the latter is used to
note/control collapsed/expanded datagridview rows on first level.

All works fine except that I cannot find how to suppress/hide row selector
arrow - when I use:

- DataGridViewCell's .Style.BackColor to paint RowHeader cell's background
- SelectionMode = CellSelect
- ShowEditingIcon = False

the record selector is still visible.

I have to use custom color - Color.LightGray to paint it over.

Thank you.

--
Shamil
 
-----Original Message-----
From: dba-vb-bounces at databaseadvisors.com
[mailto:dba-vb-bounces at databaseadvisors.com] On Behalf Of Gustav Brock
Sent: 1 ??????? 2010 ?. 12:05
To: dba-vb at databaseadvisors.com
Subject: Re: [dba-VB] WinForms: What is the best event for custom drawing
ona leftmost cell of DataGridView head

Hi Shamil

Don't know about a DataGridView but for a tab control I used DrawItem.
Nothing fancy:

<code>
        private void tabControlMail_DrawItem(object sender,
DrawItemEventArgs e)
        {
            DrawTabColor(sender, e, Color.LightBlue, Color.Black,
Color.BlueViolet, Color.Gray);
        }

        private void DrawTabColor(object sender,
System.Windows.Forms.DrawItemEventArgs e, Color FocusedBackColor, Color
FocusedForeColor, Color NonFocusedBackColor, Color NonFocusedForeColor)
        {
            Font myFont = new Font(e.Font, FontStyle.Regular);
            Brush backColorBrush;
            Brush foreColorBrush;
            StringFormat myFormat = new StringFormat();

            TabControl tabControl = (TabControl)sender;
            Rectangle rectangle = new Rectangle(tabControl.Left ,
15,tabControl.Width, tabControl.Height);
            backColorBrush = new System.Drawing.SolidBrush(Color.Linen);
            foreColorBrush = new System.Drawing.SolidBrush(Color.Gray);
            e.Graphics.FillRectangle(backColorBrush, rectangle);
            
            Console.WriteLine("s: " +
this.tabControlMail.SelectedIndex.ToString ()+ ", e: " +
e.Index.ToString());

            if (e.Index == this.tabControlMail.SelectedIndex)
            {
                myFont = new Font(e.Font, FontStyle.Regular);
                backColorBrush = new
System.Drawing.SolidBrush(FocusedBackColor);
                foreColorBrush = new
System.Drawing.SolidBrush(FocusedForeColor);
                this.tabControlMail.TabPages[e.Index].BackColor =
FocusedBackColor;
                string tabName = this.tabControlMail.TabPages[e.Index].Text;

                Rectangle rect = new Rectangle(e.Bounds.X + 4, e.Bounds.Y,
e.Bounds.Width - 6, e.Bounds.Height);
                myFormat.Alignment = StringAlignment.Center;
                e.Graphics.FillRectangle(backColorBrush, rect);
                RectangleF r = new RectangleF(e.Bounds.X + 1, e.Bounds.Y +
4, e.Bounds.Width, e.Bounds.Height - 4);
                e.Graphics.DrawString(tabName, myFont, foreColorBrush, r,
myFormat);
            }
            else
            {
                myFont = new Font(e.Font, FontStyle.Regular);
                backColorBrush = new
System.Drawing.SolidBrush(NonFocusedBackColor);
                foreColorBrush = new
System.Drawing.SolidBrush(NonFocusedForeColor);
                this.tabControlMail.TabPages[e.Index].BackColor =
Color.Linen; // FocusedBackColor;
                string tabName = this.tabControlMail.TabPages[e.Index].Text;

                Rectangle rect = new Rectangle(e.Bounds.X + 1, e.Bounds.Y,
e.Bounds.Width - 1, e.Bounds.Height + 1);
                myFormat.Alignment = StringAlignment.Center;
                e.Graphics.FillRectangle(backColorBrush, rect);
                RectangleF r = new RectangleF(e.Bounds.X, e.Bounds.Y + 4,
e.Bounds.Width, e.Bounds.Height - 4);
                e.Graphics.DrawString(tabName, myFont, foreColorBrush, r,
myFormat);
            }
            myFormat.Dispose();
            myFont.Dispose();
            backColorBrush.Dispose();
            foreColorBrush.Dispose();
        }
</code>

What are you trying to do?

/gustav


>>> shamil at smsconsulting.spb.ru 30-11-2010 19:44 >>>
Hi All --

What is the best suitable event for custom drawing on a top/left cell of
DataGridView ( .TopLeftHeaderCell)?

.RowHeadersVisible = true

Thank you.

--
Shamil
 

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