I am struggling to find a way to color the tab headers of a tabpage in WinForms. There are solutions to color the current indexed tab using the OnDrawItem
event, but is it possible to color all the tabs with different colors to make them more intuitive for users for certain behavior?
Thanks in advance.
Answers. Hi, you need to draw it yourself. Change the DrawMode for the TabControl to OwnerDrawFixed and Fill the Bounds-Rectangle with the color you like and manually draw the headerText.
An improved version of Ash's answer:
private void tabControl_DrawItem(object sender, DrawItemEventArgs e) { TabPage page = tabControl.TabPages[e.Index]; e.Graphics.FillRectangle(new SolidBrush(page.BackColor), e.Bounds); Rectangle paddedBounds = e.Bounds; int yOffset = (e.State == DrawItemState.Selected) ? -2 : 1; paddedBounds.Offset(1, yOffset); TextRenderer.DrawText(e.Graphics, page.Text, e.Font, paddedBounds, page.ForeColor); }
This code uses the TextRenderer
class to draw its text (as .NET does), fixes problems with font clipping/wrapping by not negatively inflating the bounds, and takes tab selection into account.
Thanks to Ash for the original code.
Yes, there is no need for any win32 code. You just need to set the tab controls DrawMode property to 'OwnerDrawFixed' and then handle the tab control's DrawItem event.
The following code shows how:
private void tabControl1_DrawItem(object sender, DrawItemEventArgs e) { // This event is called once for each tab button in your tab control // First paint the background with a color based on the current tab // e.Index is the index of the tab in the TabPages collection. switch (e.Index ) { case 0: e.Graphics.FillRectangle(new SolidBrush(Color.Red), e.Bounds); break; case 1: e.Graphics.FillRectangle(new SolidBrush(Color.Blue), e.Bounds); break; default: break; } // Then draw the current tab button text Rectangle paddedBounds=e.Bounds; paddedBounds.Inflate(-2,-2); e.Graphics.DrawString(tabControl1.TabPages[e.Index].Text, this.Font, SystemBrushes.HighlightText, paddedBounds); }
Setting the DrawMode to 'OwnerDrawnFixed' means each tab button has to be the same size (ie Fixed).
However if you want to change the size of all tab buttons, you can set the tab control's SizeMode property to 'Fixed' and then change the ItemSize property.
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