protected override void OnMouseDown(MouseEventArgs args)
{
base.OnMouseDown(args);
Focus();
Rectangle tabBounds = GetTabBounds();
if (tabBounds.Contains(args.X, args.Y))
{
if (args.X < ScrollerOffset)
{
ScrollLeft();
}
else if (args.X > (tabBounds.Right - ScrollerOffset))
{
ScrollRight();
}
else
{
NotebookPage page = GetTabAt(new Point(args.X, args.Y));
if (page != null)
{
Selected = page;
}
}
}
}
internal void ControlAdd(NotebookPage page)
{
if (!_updatingControls)
{
InternalAdd(_count, page);
}
}
protected virtual void SelectionChanging(NotebookPage page)
{
if (OnSelectionChanging != null)
{
OnSelectionChanging(this, page);
}
}
internal void ControlRemove(NotebookPage page)
{
if (!_updatingControls)
{
InternalRemoveAt(IndexOf(page));
}
}
public int IndexOf(NotebookPage page)
{
for (int i = 0; i < _count; i++)
{
if (_pages[i] == page)
{
return(i);
}
}
return(-1);
}
public void Insert(int index, NotebookPage page)
{
_updatingControls = true;
try
{
_notebook.Controls.Add(page);
}
finally
{
_updatingControls = false;
}
InternalAdd(index, page);
}
public void Remove(NotebookPage page)
{
InternalRemoveAt(IndexOf(page));
_updatingControls = true;
try
{
_notebook.Controls.Remove(page);
}
finally
{
_updatingControls = false;
}
}
protected virtual void PaintTabText(Graphics graphics, Rectangle bounds, NotebookPage page, StringFormat format)
{
if (page.Enabled)
{
using (Brush textBrush = new SolidBrush(ForeColor))
{
graphics.DrawString(page.Text, Font, textBrush, bounds, format);
}
}
else
{
ControlPaint.DrawStringDisabled(graphics, page.Text, Font, SystemColors.InactiveCaptionText, bounds, format);
}
}
public void RemoveAt(int index)
{
NotebookPage result = InternalRemoveAt(index);
_updatingControls = true;
try
{
_notebook.Controls.Remove(result);
}
finally
{
_updatingControls = false;
}
}
public int Add(NotebookPage page)
{
_updatingControls = true;
try
{
_notebook.Controls.Add(page);
}
finally
{
_updatingControls = false;
}
InternalAdd(_count, page);
return(_count - 1);
}
internal void UpdateSelection()
{
// Clear the selection if the selected control is no longer a child of this control
if ((_selected != null) && (_selected.Parent != this))
{
Selected = null;
}
else
{
// Ensure that there is a selection if there is at least one tab
if ((_selected == null) && (Pages.Count > 0))
{
Selected = (NotebookPage)Pages[0];
}
}
}
/// <summary> Makes the prior tab the selected one. </summary>
/// <returns> True if the selection changed. </returns>
public bool SelectPriorPage()
{
if (_selected != null)
{
int index = Pages.IndexOf(_selected);
if (index > 0)
{
Selected = (NotebookPage)Pages[index - 1];
}
else
{
Selected = (NotebookPage)Pages[Pages.Count - 1];
}
return(true);
}
return(false);
}
protected virtual void PaintTab(Graphics graphics, int offset, NotebookPage page, int tabWidth, bool isActive)
{
Rectangle bounds = base.DisplayRectangle;
StringFormat format = GetStringFormat();
int rounding = GetRounding();
if (_tabAlignment == TabAlignment.Top)
{
using (GraphicsPath path = new GraphicsPath())
{
// Create path for tab fill
path.AddBezier(offset, _tabAreaHeight, offset + (_tabAreaHeight / 2), _tabAreaHeight / 2, offset + (_tabAreaHeight / 2), 0, offset + _tabAreaHeight, 0);
path.AddLine(offset + _tabAreaHeight, 0, offset + (tabWidth - rounding), 0);
path.AddBezier(offset + (tabWidth - rounding), 0, offset + tabWidth, 0, offset + tabWidth, 0, offset + tabWidth, rounding);
path.AddLine(offset + tabWidth, rounding, offset + tabWidth, _tabAreaHeight);
path.CloseFigure();
// Fill the tab
using (Brush brush = new LinearGradientBrush(new Rectangle(0, 0, bounds.Width, _tabAreaHeight), _tabOriginColor, _tabColor, 90f, true))
{
graphics.FillPath(brush, path);
}
using (Pen pen = new Pen(_lineColor))
{
// Draw the tab border line
graphics.DrawBezier(pen, offset, _tabAreaHeight, offset + (_tabAreaHeight / 2), _tabAreaHeight / 2, offset + (_tabAreaHeight / 2), 0, offset + _tabAreaHeight, 0);
graphics.DrawLine(pen, offset + _tabAreaHeight, 0, offset + (tabWidth - rounding), 0);
graphics.DrawBezier(pen, offset + (tabWidth - rounding), 0, offset + tabWidth, 0, offset + tabWidth, 0, offset + tabWidth, rounding);
graphics.DrawLine(pen, offset + tabWidth, rounding, offset + tabWidth, _tabAreaHeight);
// Draw the highlight
pen.Color = Color.White;
graphics.DrawBezier(pen, 1 + offset, _tabAreaHeight, 1 + offset + (_tabAreaHeight / 2), 1 + (_tabAreaHeight / 2), 1 + offset + (_tabAreaHeight / 2), 1, 1 + offset + _tabAreaHeight, 1);
graphics.DrawLine(pen, 1 + offset + _tabAreaHeight, 1, offset + (tabWidth - rounding), 1);
graphics.DrawBezier(pen, offset + (tabWidth - rounding), 1, (offset + tabWidth) - 1, 1, (offset + tabWidth) - 1, 1, (offset + tabWidth) - 1, rounding / 2);
}
}
PaintTabText(graphics, new Rectangle((offset + _tabAreaHeight) - (_tabPadding / 2), (_tabAreaHeight - Font.Height) / 2, tabWidth, Font.Height), page, format);
}
else
{
// TODO: Paint TabAlignment = Bottom
}
}
private NotebookPage InternalRemoveAt(int index)
{
if (index >= _count)
{
throw new ArgumentOutOfRangeException("AIndex");
}
NotebookPage result = _pages[index];
_count--;
Array.Copy(_pages, index + 1, _pages, index, _count - index);
result.TextChanged -= new EventHandler(PageTextChanged);
result.EnabledChanged -= new EventHandler(PageEnabledChanged);
UpdateNotebook();
return(result);
}
/// <summary> Makes the next tab the selected one. </summary>
/// <returns> True if the selection changed. </returns>
public bool SelectNextPage()
{
if (_selected != null)
{
int index = Pages.IndexOf(_selected);
if (index >= 0)
{
if ((index < (Pages.Count - 1)))
{
Selected = (NotebookPage)Pages[index + 1];
}
else
{
Selected = (NotebookPage)Pages[0];
}
return(true);
}
}
return(false);
}
/// <summary> Attempts to scroll the specified page into view. </summary>
/// <remarks> If the given page is not a valid child page, nothing happens. </remarks>
public void ScrollIntoView(NotebookPage page)
{
int[] tabWidths = GetTabWidths();
int pageIndex = Pages.IndexOf(page);
if (pageIndex >= 0)
{
int tabWidth = GetTabBounds().Width - (ScrollerOffset * 2);
int tabOverlap = GetTabOverlap();
int accumulated = tabWidths[pageIndex];
// Don't scroll below LMin offset, doing so would hide the specified page
int min;
for (min = pageIndex; (min > 0) && ((accumulated + (tabWidths[min - 1] - tabOverlap)) <= tabWidth); min--)
{
accumulated += tabWidths[min - 1] - tabOverlap;
}
ScrollOffset = Math.Min(pageIndex, Math.Max(ScrollOffset, min));
}
}
private void InternalAdd(int index, NotebookPage page)
{
page.Visible = false;
page.TextChanged += new EventHandler(PageTextChanged);
page.EnabledChanged += new EventHandler(PageEnabledChanged);
// Grow the capacity of FPages if necessary
if (_count == _pages.Length)
{
NotebookPage[] pages = new NotebookPage[Math.Min(_pages.Length * 2, _pages.Length + 512)];
Array.Copy(_pages, pages, _pages.Length);
_pages = pages;
}
// Shift the items
Array.Copy(_pages, index, _pages, index + 1, _count - index);
// Set the inserted item
_pages[index] = page;
_count++;
UpdateNotebook();
}
public bool Contains(NotebookPage page)
{
return(IndexOf(page) >= 0);
}
protected virtual int GetTabWidth(Graphics graphics, NotebookPage page)
{
return((_tabAreaHeight / 4) + _tabAreaHeight + Size.Ceiling(graphics.MeasureString(page.Text, Font, PointF.Empty, GetStringFormat())).Width);
}
