/// <summary>
/// Draws a single tab.
/// </summary>
/// <param name="g">A <see cref="T:System.Drawing.Graphics"/> object used to draw the tab control.</param>
/// <param name="index">An index of the tab being drawn.</param>
/// <param name="tabRect">A <see cref="T:System.Drawing.Rectangle"/> object specifying tab's bounds.</param>
/// <param name="rend">A <see cref="T:System.Windows.Forms.VisualStyles.VisualStyleRenderer"/> object for rendering the tab.</param>
private void DrawTabItem(Graphics g, int index, Rectangle tabRect, VisualStyleRenderer rend)
{
//if the scroller is visible and the tab is fully placed under it, we don't need to draw such tab
if (fUpDown.X > 0 && tabRect.X >= fUpDown.X)
{
return;
}
bool tabSelected = rend.State == (int)TabItemState.Selected;
// We will draw our tab on a bitmap and then transfer image to the control's graphic context.
using (GDIMemoryContext memGDI = new GDIMemoryContext(g, tabRect.Width, tabRect.Height))
{
Rectangle drawRect = new Rectangle(0, 0, tabRect.Width, tabRect.Height);
rend.DrawBackground(memGDI.Graphics, drawRect);
if (tabSelected && tabRect.X == 0)
{
int corrY = memGDI.Height - 1;
memGDI.SetPixel(0, corrY, memGDI.GetPixel(0, corrY - 1));
}
/* An important moment. If tabs alignment is bottom, we should flip the image to display the tab
* correctly.*/
if (this.Alignment == TabAlignment.Bottom)
{
memGDI.FlipVertical();
}
TabPage pg = this.TabPages[index];//tab page whose tab we're drawing
//trying to get a tab image if any
Image pagePict = this.GetImageByIndexOrKey(pg.ImageIndex, pg.ImageKey);
if (pagePict != null)
{
//If tab image is present we should draw it.
Point imgLoc = new Point(tabSelected ? 8 : 6, 2);
int imgRight = imgLoc.X + pagePict.Width;
if (this.Alignment == TabAlignment.Bottom)
{
imgLoc.Y = drawRect.Bottom - pagePict.Height - (tabSelected ? 4 : 2);
}
if (RightToLeftLayout)
{
imgLoc.X = drawRect.Right - imgRight;
}
memGDI.Graphics.DrawImageUnscaled(pagePict, imgLoc);
//Correcting rectangle for drawing text.
drawRect.X += imgRight; drawRect.Width -= imgRight;
}
//drawing tab text
TextRenderer.DrawText(memGDI.Graphics, pg.Text, this.Font, drawRect, rend.GetColor(ColorProperty.TextColor),
TextFormatFlags.SingleLine | TextFormatFlags.HorizontalCenter | TextFormatFlags.VerticalCenter);
//If the tab has part under scroller we shouldn't draw that part.
if (fUpDown.X > 0 && fUpDown.X >= tabRect.X && fUpDown.X < tabRect.Right)
{
tabRect.Width -= tabRect.Right - fUpDown.X;
}
memGDI.DrawContextClipped(g, tabRect);
}
}
/// <summary>
/// Draws a single tab.
/// </summary>
/// <param name="g">A <see cref="T:System.Drawing.Graphics"/> object used to draw the tab control.</param>
/// <param name="index">An index of the tab being drawn.</param>
/// <param name="tabRect">A <see cref="T:System.Drawing.Rectangle"/> object specifying tab's bounds.</param>
/// <param name="rend">A <see cref="T:System.Windows.Forms.VisualStyles.VisualStyleRenderer"/> object for rendering the tab.</param>
private void DrawTabItem(Graphics g, int index, Rectangle tabRect, VisualStyleRenderer rend)
{
//if the scroller is visible and the tab is fully placed under it, we don't need to draw such tab
if (fUpDown.X > 0 && tabRect.X >= fUpDown.X) return;
bool tabSelected = rend.State == (int)TabItemState.Selected;
// We will draw our tab on a bitmap and then transfer image to the control's graphic context.
using (GDIMemoryContext memGDI = new GDIMemoryContext(g, tabRect.Width, tabRect.Height))
{
Rectangle drawRect = new Rectangle(0, 0, tabRect.Width, tabRect.Height);
rend.DrawBackground(memGDI.Graphics, drawRect);
if (tabSelected && tabRect.X == 0)
{
int corrY = memGDI.Height - 1;
memGDI.SetPixel(0, corrY, memGDI.GetPixel(0, corrY - 1));
}
/* An important moment. If tabs alignment is bottom, we should flip the image to display the tab
* correctly.*/
if (this.Alignment == TabAlignment.Bottom) memGDI.FlipVertical();
TabPage pg = this.TabPages[index];//tab page whose tab we're drawing
//trying to get a tab image if any
Image pagePict = this.GetImageByIndexOrKey(pg.ImageIndex, pg.ImageKey);
if (pagePict != null)
{
//If tab image is present we should draw it.
Point imgLoc = new Point(tabSelected ? 8 : 6, 2);
int imgRight = imgLoc.X + pagePict.Width;
if (this.Alignment == TabAlignment.Bottom)
imgLoc.Y = drawRect.Bottom - pagePict.Height - (tabSelected ? 4 : 2);
if (RightToLeftLayout) imgLoc.X = drawRect.Right - imgRight;
memGDI.Graphics.DrawImageUnscaled(pagePict, imgLoc);
//Correcting rectangle for drawing text.
drawRect.X += imgRight; drawRect.Width -= imgRight;
}
//drawing tab text
TextRenderer.DrawText(memGDI.Graphics, pg.Text, this.Font, drawRect, rend.GetColor(ColorProperty.TextColor),
TextFormatFlags.SingleLine | TextFormatFlags.HorizontalCenter | TextFormatFlags.VerticalCenter);
//If the tab has part under scroller we shouldn't draw that part.
if (fUpDown.X > 0 && fUpDown.X >= tabRect.X && fUpDown.X < tabRect.Right)
tabRect.Width -= tabRect.Right - fUpDown.X;
memGDI.DrawContextClipped(g, tabRect);
}
}
