protected virtual void OnTabStripItemChanged(TabStripItem tabItem)
{
if (TabStripItemChanged != null)
{
TabStripItemChanged(tabItem);
}
}
void CalculateVisibility(TabStripItem lastAdded)
{
Rectangle selectedButton = Rectangle.Empty;
StringFormat sf = new StringFormat();
sf.LineAlignment = StringAlignment.Center;
sf.Trimming = StringTrimming.EllipsisCharacter;
sf.FormatFlags |= StringFormatFlags.NoWrap;
int right = 0;
_VisibleCount = 0;
using (Graphics _Gfx = this.CreateGraphics())
{
Control[] ctls = new Control[this.Controls.Count + 1];
this.Controls.CopyTo(ctls, 0);
ctls[this.Controls.Count] = lastAdded;
for (int i = 0; i < ctls.Length; i++)
{
TabStripItem current = (TabStripItem)ctls[i];
Font currentFont = this.Font;
if ((current.DrawState &= DrawItemState.Selected) == DrawItemState.Selected)
{
currentFont = new Font(this.Font, FontStyle.Bold);
}
Size textSize = _Gfx.MeasureString(current.Text, currentFont, new SizeF(200, 10), sf).ToSize();
textSize.Width += 20;
Rectangle buttonRect = new Rectangle(right, 3, textSize.Width, 17);
current.StripRect = buttonRect;
right += textSize.Width;
if (right >= _StripButtonRect.Width)
{
break;
}
_VisibleCount = i;
}
}
}
void loadMenuItems()
{
_ContextDocsList.Items.Clear();
for (int i = 0; i < this.Controls.Count; i++)
{
TabStripItem item = (TabStripItem)this.Controls[i];
ToolStripMenuItem tItem = new ToolStripMenuItem(item.Text);
tItem.Tag = item;
_ContextDocsList.Items.Add(tItem);
}
}
protected override void OnControlAdded(ControlEventArgs e)
{
if (!(e.Control is TabStripItem))
{
throw new Exception("TabStrip accept only TabStripItem");
}
base.OnControlAdded(e);
if (this.SelectedItem == null)
{
this.SelectedItem = (TabStripItem)e.Control;
}
else
{
e.Control.Visible = false;
}
CalculateVisibility((TabStripItem)e.Control);
this.Invalidate();
}
void UnSelectItem(TabStripItem tabItem)
{
tabItem.Visible = false;
tabItem.DrawState = DrawItemState.None;
}
void SelectItem(TabStripItem tabItem)
{
tabItem.Visible = true;
tabItem.DrawState |= DrawItemState.Selected;
}
protected override void OnMouseDown(MouseEventArgs e)
{
base.OnMouseDown(e);
if (e.Button != MouseButtons.Left)
{
return;
}
if (_MenuGlyph.GlyphRect.Contains(e.Location))
{
loadMenuItems();
if (_ContextDocsList.Visible == false)
{
_ContextDocsList.Show(this, new Point(e.X, _MenuGlyph.GlyphRect.Bottom));
}
}
if (_CloseButton.CrossRect.Contains(e.Location) && this.SelectedItem.CanClose)
{
TabStripItemClosingEventArgs evt = new TabStripItemClosingEventArgs(_SelectedItem);
OnTabStripItemClosing(evt);
if (!evt.Cancel)
{
this.Controls.Remove(_SelectedItem);
this.OnTabStripItemClosing(EventArgs.Empty);
}
}
this.Invalidate();
TabStripItem selected = null;
for (int i = 0; i < this.Controls.Count; i++)
{
TabStripItem current = (TabStripItem)this.Controls[i];
if (current.StripRect.Contains(e.Location))
{
current.DrawState |= DrawItemState.Selected;
if (current.StripRect.Right > _StripButtonRect.Right)
{
break;
}
else
{
selected = current;
break;
}
}
}
if (selected == null)
{
return;
}
this.SelectedItem = selected;
this.Invalidate();
}
public void RemoveTab(TabStripItem tabItem)
{
this.Controls.Remove(tabItem);
}
public void AddTab(TabStripItem tabItem)
{
this.Controls.Add(tabItem);
}
//private int CalculateVisibilityCount()
//{
// for (int i = 0; i < this.Controls.Count; i++)
// {
// }
//}
protected override void OnPaint(PaintEventArgs e)
{
Rectangle borderRc = base.ClientRectangle;
borderRc.Width--;
borderRc.Height--;
//ControlPaint.DrawVisualStyleBorder(e.Graphics, borderRc);
e.Graphics.DrawRectangle(SystemPens.ControlDark, borderRc);
e.Graphics.SmoothingMode = SmoothingMode.AntiAlias;
float right = 10;
RectangleF selectedButton = Rectangle.Empty;
StringFormat sf = new StringFormat();
// sf.LineAlignment = StringAlignment.Center;
sf.Trimming = StringTrimming.EllipsisCharacter;
sf.FormatFlags |= StringFormatFlags.NoWrap;
for (int i = 0; i < this.Controls.Count; i++)
{
TabStripItem current = (TabStripItem)this.Controls[i];
Font currentFont = this.Font;
if ((current.DrawState &= DrawItemState.Selected) == DrawItemState.Selected)
{
currentFont = new Font(this.Font, FontStyle.Bold);
}
SizeF textSize = e.Graphics.MeasureString(current.Text, currentFont, new SizeF(200, 10), sf);
textSize.Width += 20;
RectangleF buttonRect = new RectangleF(right, 3, textSize.Width, 17);
current.StripRect = buttonRect;
right += textSize.Width;
if (right > _StripButtonRect.Width)
{
break;
}
DrawButton(e.Graphics, buttonRect, current.DrawState, this.Controls.GetChildIndex(current));
PointF textLoc = new PointF(buttonRect.Left + buttonRect.Height - 2
, buttonRect.Top + (buttonRect.Height / 2) - (textSize.Height / 2) - 2);
RectangleF textRect = buttonRect;
textRect.Location = textLoc;
textRect.X -= 2;
textRect.Y -= 2;
textRect.Width = (float)buttonRect.Width - (textRect.Left - buttonRect.Left);
textRect.Height = textSize.Height + currentFont.Size / 2;
if ((current.DrawState &= DrawItemState.Selected) == DrawItemState.Selected)
{
e.Graphics.DrawString(current.Text, currentFont, new SolidBrush(this.ForeColor), textRect, sf);
}
else
{
e.Graphics.DrawString(current.Text, currentFont, new SolidBrush(this.ForeColor), textRect, sf);
}
if (current == _SelectedItem)
{
selectedButton = buttonRect;
}
_VisibleCount = i;
if (right > _StripButtonRect.Width)
{
break;
}
}
if (_SelectedItem != null)
{
if (this.Controls.GetChildIndex(_SelectedItem) != 0)
{
e.Graphics.DrawLine(SystemPens.ControlDark, 0, _SelectedItem.StripRect.Bottom - 1,
_SelectedItem.StripRect.Left - 10, _SelectedItem.StripRect.Bottom - 1);
}
e.Graphics.DrawLine(SystemPens.ControlDark, _SelectedItem.StripRect.Right, _SelectedItem.StripRect.Bottom - 1,
this.ClientSize.Width, _SelectedItem.StripRect.Bottom - 1);
e.Graphics.DrawLine(Pens.White, _SelectedItem.StripRect.Left - 9,
_SelectedItem.StripRect.Bottom - 1, _SelectedItem.StripRect.Right,
_SelectedItem.StripRect.Bottom - 1);
}
if (_SelectedItem == null)
{
return;
}
_CloseButton.Activated = _SelectedItem.CanClose;
_MenuGlyph.DrawGlyph(e.Graphics);
if (_SelectedItem.CanClose)
{
_CloseButton.DrawCross(e.Graphics);
}
}
public TabStripItemClosingEventArgs(TabStripItem item)
{
_item = item;
}