private void UpdateTabLocations()
{
int total = 0;
Point drawPoint = Point.Empty;
switch (owner.Navigator.Location)
{
case NavigatorLocation.Bottom:
drawPoint.Y = pageHeight;
break;
}
if (tabs == null || tabs.Length != owner.VisiblePageCount)
{
if (visiblePages.Count != owner.VisiblePageCount)
{
RefreshAllPages();
// return because RefreshAllPages will call this function.
return;
}
tabs = new TabRenderInfo[owner.VisiblePageCount];
for (int i = 0; i < tabs.Length; i++)
{
tabs[i] = new TabRenderInfo();
}
}
// calculate the total size used if none of the tabs are compressed.
for (int i = 0; i < visiblePages.Count; i++)
{
TabRenderInfo info = tabs[i];
Size tabSize, imageSize, textSize;
TabMetrics(visiblePages[i], out tabSize, out imageSize, out textSize);
total += tabSize.Width;
info.Location = drawPoint;
info.imageSize = imageSize;
info.textSize = textSize;
if (navProperties.AllowClose && ParentDesign == false)
{
info.ShowCloseBox = true;
}
drawPoint.X += tabSize.Width;
}
if (total >= ClientSize.Width)
{
int pixelsToReclaim = total - ClientSize.Width + 1;
int divideCount = tabs.Length;
if (SelectedIndex >= 0 && divideCount > 1)
{
divideCount -= 1;
}
int pixelsReclaimed = 0;
// remove close boxes first
for (int i = tabs.Length - 1; i >= 0; i--)
{
if (visiblePages[i] == owner.SelectedPage)
{
continue;
}
if (tabs[i].ShowCloseBox)
{
tabs[i].ShowCloseBox = false;
pixelsReclaimed += Properties.Resources.Close.Width;
for (int j = i + 1; j < tabs.Length; j++)
{
tabs[j].Location.X -= Properties.Resources.Close.Width;
}
}
if (pixelsReclaimed >= pixelsToReclaim)
{
break;
}
}
// shorten text now since removing closeboxes wasn't enough
if (pixelsReclaimed < pixelsToReclaim)
{
int shorten = (int)Math.Ceiling(pixelsToReclaim / (double)divideCount);
for (int i = 0; i < tabs.Length; i++)
{
if (visiblePages[i] == owner.SelectedPage)
{
continue;
}
tabs[i].textSize.Width -= shorten;
for (int j = i + 1; j < tabs.Length; j++)
{
tabs[j].Location.X -= shorten;
}
}
}
}
}
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
UpdateTabLocations();
Brush selBrush = new SolidBrush(owner.Navigator.PageBackColor);
Pen pathPen = SystemPens.ControlDark;
Rectangle pageExtendRect = new Rectangle();
switch (owner.Navigator.Location)
{
case NavigatorLocation.Bottom:
pageExtendRect = new Rectangle(0, 0, ClientSize.Width, pageHeight);
break;
case NavigatorLocation.Top:
pageExtendRect = new Rectangle(0, NavMinSize.Height - pageHeight, ClientSize.Width, pageHeight);
break;
}
e.Graphics.FillRectangle(selBrush, pageExtendRect);
// draw the tab outline
GraphicsPath path = new GraphicsPath();
Point drawPoint = new Point(0, pageHeight);
for (int i = 0; i < visiblePages.Count; i++)
{
TabRenderInfo info = tabs[i];
Rectangle rect = tabs[i].Bounds;
NotebookPage page = visiblePages[i];
Font thisFont = this.Font;
drawPoint = rect.Location;
switch (owner.Navigator.Location)
{
case NavigatorLocation.Top:
drawPoint.Y += tabMargin;
break;
}
// fill background of the selected page
if (owner.SelectedPage == page)
{
Rectangle fillRect = new Rectangle();
thisFont = mBoldFont;
// add the right lines to the path to go around the tab
switch (owner.Navigator.Location)
{
case NavigatorLocation.Top:
path.AddLines(new Point[]
{
new Point(rect.Left, rect.Bottom),
new Point(rect.Left, rect.Top + 2),
new Point(rect.Left + 2, rect.Top),
new Point(rect.Right - 2, rect.Top),
new Point(rect.Right, rect.Top + 2),
new Point(rect.Right, rect.Bottom)
});
fillRect = new Rectangle(
rect.Left + 1, rect.Top + 1, rect.Width - 1, rect.Height);
break;
case NavigatorLocation.Bottom:
path.AddLines(new Point[]
{
rect.Location,
new Point(rect.Left, rect.Bottom - 2),
new Point(rect.Left + 2, rect.Bottom),
new Point(rect.Right - 2, rect.Bottom),
new Point(rect.Right, rect.Bottom - 2),
new Point(rect.Right, rect.Top)
});
fillRect = new Rectangle(
rect.Left + 1, rect.Top, rect.Width - 1, rect.Height - 1);
break;
}
e.Graphics.FillRectangle(selBrush, fillRect);
}
else
{
switch (owner.Navigator.Location)
{
case NavigatorLocation.Bottom:
path.AddLine(rect.Location, new Point(rect.Right, rect.Top));
break;
case NavigatorLocation.Top:
path.AddLine(new Point(rect.X, rect.Bottom), new Point(rect.Right, rect.Bottom));
break;
}
if (i > 0)
{
e.Graphics.DrawLine(pathPen, new Point(rect.Left, rect.Top + 4), new Point(rect.Left, rect.Bottom - 4));
}
}
drawPoint.X += tabMargin;
// draw page image
if (page.Image != null)
{
drawPoint.X += imageMargin;
Rectangle imageRect = new Rectangle(drawPoint, info.imageSize);
imageRect.Y += (rect.Height - imageRect.Height) / 2;
e.Graphics.DrawImage(page.Image, imageRect);
drawPoint.X += info.imageSize.Width + imageMargin;
}
if (navProperties.AllowClose && info.ShowCloseBox)
{
Image image = Properties.Resources.Close;
if (mOverCloseBox == i)
{
image = Properties.Resources.CloseMouseOver;
}
e.Graphics.DrawImage(image, info.CloseBox);
}
Rectangle textRect = Rectangle.FromLTRB(
drawPoint.X, drawPoint.Y, rect.Right - tabMargin, rect.Bottom - tabMargin - 1);
TextRenderer.DrawText(e.Graphics, page.Text, thisFont, textRect, ForeColor,
TextFormatFlags.EndEllipsis | TextFormatFlags.VerticalCenter |
TextFormatFlags.SingleLine | TextFormatFlags.NoPrefix);
}
if (path.PointCount > 0)
{
switch (owner.Navigator.Location)
{
case NavigatorLocation.Bottom:
path.AddLine(Point.Round(path.GetLastPoint()), new Point(ClientRectangle.Right, drawPoint.Y));
break;
case NavigatorLocation.Top:
path.AddLine(Point.Round(path.GetLastPoint()), new Point(ClientRectangle.Right, TabHeight));
break;
}
e.Graphics.DrawPath(pathPen, path);
}
}