public TabControl()
{
base.SetStyle(ControlStyles.DoubleBuffer | ControlStyles.AllPaintingInWmPaint | ControlStyles.ResizeRedraw | ControlStyles.Opaque | ControlStyles.UserPaint, true);
this._tabCollection = new TabPageCollection(this);
this._selectedIndex = -1;
this._selectedTabPage = null;
this._toolTip = new RegionToolTip(this);
this._placement = Microsoft.Matrix.UIComponents.TabPlacement.Top;
this._mode = TabControlMode.TextAndImage;
this._effectiveMode = TabControlMode.TextAndImage;
this._tabRectanglesCalculated = false;
}
// UNDONE: ��TabPage��RectangleֵʹTabControl֧��TabPlacement.Left��TabPlacement.Left
private void EnsureTabRectangles(Graphics g, Font font, Rectangle clientRect)
{
#region if calculated
if (this._tabRectanglesCalculated)
return;
if (this._tabCollection.Count < 2)
{
this._tabRectanglesCalculated = true;
return;
}
#endregion
#region Remove Tooltip Region
if (this._toolTip.IsToolTipCreated)
{
foreach (TabPage page in this._tabCollection)
{
if (page.ToolTipID != -1)
{
this._toolTip.RemoveToolTipRegion(page.ToolTipID);
page.ToolTipID = -1;
}
}
}
#endregion
#region Prepare clientRect, grephics and font etc
this._effectiveMode = this._mode;
if (clientRect.IsEmpty)
{
clientRect = base.ClientRectangle;
}
if (font == null)
{
font = this.Font;
}
bool graphicsCreated = false;
if (g == null)
{
g = base.CreateGraphics();
graphicsCreated = true;
}
#endregion
#region calc tabs width and save in an array
int[] tabWidthArray = new int[this._tabCollection.Count];
int totalTabWidth = 10;
int minTabWidth = 0x7fffffff;
int index = 0;
int rectWidth;
StringFormat verticalFormat = new StringFormat( StringFormatFlags.DirectionVertical);
foreach (TabPage page2 in this._tabCollection)
{
rectWidth = 11;
if (this._mode != TabControlMode.TextOnly)
{
rectWidth += 0x10;
}
if (this._mode != TabControlMode.ImageOnly)
{
SizeF ef;
rectWidth += 4;
if (this._placement == TabPlacement.Top || this._placement == TabPlacement.Bottom)
{
ef = g.MeasureString(page2.Text, font);
rectWidth += (int) ef.Width;
}
else
{
ef = g.MeasureString(page2.Text, font, font.Height, verticalFormat);
rectWidth += (int)ef.Height;
}
}
minTabWidth = Math.Min(minTabWidth, rectWidth);
totalTabWidth += rectWidth;
tabWidthArray[index++] = rectWidth;
}
#endregion
#region tab�ܿ�ȴ���tabControl���ʱ����Ӧ����
bool tabWidthAdjusted = false;
int availableClientWidth;
if (this._placement == TabPlacement.Top || this._placement == TabPlacement.Bottom)
availableClientWidth = clientRect.Width - 10;
else
availableClientWidth = clientRect.Height - 10;
if ((availableClientWidth > 0) && (totalTabWidth > availableClientWidth))
{
int averageTabWidth = availableClientWidth / this._tabCollection.Count;
bool textOnly = false;
tabWidthAdjusted = true;
if (this._mode == TabControlMode.TextOnly)
{
textOnly = true;
}
else
{
int imageOnlyWidth = 0x1b;
if (averageTabWidth < imageOnlyWidth)
{
this._effectiveMode = TabControlMode.TextOnly;
for (int i = 0; i < tabWidthArray.Length; i++)
{
tabWidthArray[i] = averageTabWidth;
}
}
else if (Math.Abs((int) (averageTabWidth - imageOnlyWidth)) < 10)
{
this._effectiveMode = TabControlMode.ImageOnly;
for (int j = 0; j < tabWidthArray.Length; j++)
{
tabWidthArray[j] = imageOnlyWidth;
}
}
else
{
textOnly = true;
}
}
if (textOnly)
{
int originAverageTabWidth = averageTabWidth;
int originAvailableClientWidth = availableClientWidth;
int num12 = 0;
for (int i = 0; i < tabWidthArray.Length; i++)
{
if (tabWidthArray[i] <= averageTabWidth)
{
originAvailableClientWidth -= averageTabWidth;
num12++;
}
}
if (this._tabCollection.Count == num12)
{
averageTabWidth = originAvailableClientWidth / this._tabCollection.Count;
}
else
{
averageTabWidth = originAvailableClientWidth / (this._tabCollection.Count - num12);
}
for (int m = 0; m < tabWidthArray.Length; m++)
{
if (tabWidthArray[m] > originAverageTabWidth)
{
tabWidthArray[m] = averageTabWidth;
}
}
}
}
#endregion //tab�ܿ�ȴ���tabControl���ʱ����Ӧ����
int rectX = 0;
int rectY = 0;
if (this._placement == TabPlacement.Top)
{
rectX = 5;
rectY = 2;
}
else if (this._placement == TabPlacement.Bottom)
{
rectX = 5;
rectY = clientRect.Height - this.TabWellHeight;
}
else if (this._placement == TabPlacement.Left)
{
rectY = 5;
rectX = clientRect.X + 2;
}
else if (this._placement == TabPlacement.Right)
{
rectY = 5;
rectX = clientRect.Width - this.TabWellHeight;
}
index = 0;
foreach (TabPage page3 in this._tabCollection)
{
rectWidth = tabWidthArray[index];
//added to support vertical layout
if (this._placement == TabPlacement.Top || this._placement == TabPlacement.Bottom)
{
page3.Rectangle = new Rectangle(rectX, rectY, rectWidth, this.TabHeight);
rectX += rectWidth;
}
else
{
page3.Rectangle = new Rectangle(rectX, rectY, this.TabHeight, rectWidth);
rectY += rectWidth;
}
if (base.IsHandleCreated)
{
string toolTipText = page3.ToolTipText;
if (((toolTipText.Length == 0) && tabWidthAdjusted) && (this._mode != TabControlMode.ImageOnly))
{
toolTipText = page3.Text;
}
if (toolTipText.Length != 0)
{
this._toolTip.AddToolTipRegion(toolTipText, index, page3.Rectangle);
page3.ToolTipID = index;
}
}
index++;
}
if (graphicsCreated)
{
g.Dispose();
}
this._tabRectanglesCalculated = true;
}
