/// <include file='doc\TabPage.uex' path='docs/doc[@for="TabPage.OnPaintBackground"]/*' />
protected override void OnPaintBackground(PaintEventArgs e)
{
// Utilize the TabRenderer new to Whidbey to draw the tab pages so that the
// panels are drawn using the correct visual styles when the application supports using visual
// styles.
// Does this application utilize Visual Styles?
// Utilize the UseVisualStyleBackColor property to determine whether or
// not the themed background should be utilized.
TabControl parent = ParentInternal as TabControl;
if (Application.RenderWithVisualStyles && UseVisualStyleBackColor && (parent != null && parent.Appearance == TabAppearance.Normal))
{
Color bkcolor = UseVisualStyleBackColor ? Color.Transparent : this.BackColor;
Rectangle inflateRect = LayoutUtils.InflateRect(DisplayRectangle, Padding);
//To ensure that the tabpage draws correctly (the border will get clipped and
// and gradient fill will match correctly with the tabcontrol). Unfortunately, there is no good way to determine
// the padding used on the tabpage.
// I would like to use the following below, but GetMargins is busted in the theming API:
//VisualStyleRenderer visualStyleRenderer = new VisualStyleRenderer(VisualStyleElement.Tab.Pane.Normal);
//Padding themePadding = visualStyleRenderer.GetMargins(e.Graphics, MarginProperty.ContentMargins);
//Rectangle rectWithBorder = new Rectangle(inflateRect.X - themePadding.Left,
// inflateRect.Y - themePadding.Top,
// inflateRect.Width + themePadding.Right + themePadding.Left,
// inflateRect.Height + themePadding.Bottom + themePadding.Top);
Rectangle rectWithBorder = new Rectangle(inflateRect.X - 4, inflateRect.Y - 2, inflateRect.Width + 8, inflateRect.Height + 6);
TabRenderer.DrawTabPage(e.Graphics, rectWithBorder);
// Is there a background image to paint? The TabRenderer does not currently support
// painting the background image on the panel, so we need to draw it ourselves.
if (this.BackgroundImage != null)
{
ControlPaint.DrawBackgroundImage(e.Graphics, BackgroundImage, bkcolor, BackgroundImageLayout, inflateRect, inflateRect, DisplayRectangle.Location);
}
}
else
{
base.OnPaintBackground(e);
}
}
protected override void OnPaintBackground(PaintEventArgs e)
{
TabControl parentInternal = this.ParentInternal as TabControl;
if ((Application.RenderWithVisualStyles && this.UseVisualStyleBackColor) && ((parentInternal != null) && (parentInternal.Appearance == TabAppearance.Normal)))
{
Color backColor = this.UseVisualStyleBackColor ? Color.Transparent : this.BackColor;
Rectangle bounds = LayoutUtils.InflateRect(this.DisplayRectangle, base.Padding);
Rectangle rectangle2 = new Rectangle(bounds.X - 4, bounds.Y - 2, bounds.Width + 8, bounds.Height + 6);
TabRenderer.DrawTabPage(e.Graphics, rectangle2);
if (this.BackgroundImage != null)
{
ControlPaint.DrawBackgroundImage(e.Graphics, this.BackgroundImage, backColor, this.BackgroundImageLayout, bounds, bounds, this.DisplayRectangle.Location);
}
}
else
{
base.OnPaintBackground(e);
}
}
