/// <summary>
/// The constructor, which takes the vertical tab control owner of this object.
/// <seealso cref="VerticalTabControl"/>
/// <seealso cref="VerticalTabPage"/>
/// </summary>
/// <param name="tabControl">Owner of the collection.</param>
public VerticalTabPageCollection(VerticalTabControl tabControl)
{
this.tabControl = tabControl;
}
/// <summary>
/// Draw horizontal button back on the graphics specified.
/// </summary>
/// <param name="graphics">Button graphics object.</param>
private void DrawHorizontalButtonBack(Graphics graphics)
{
// Define button radius
int radius = (int)Math.Round(this.ClientRectangle.Height / 3.0);
// Draw background image
VerticalTabControl tabControl = this.Parent as VerticalTabControl;
if (tabControl != null && tabControl.BackgroundImage != null)
{
int height = tabControl.GetButtonHeight() + 1;
// Draw image in the background of the tab controls.
// Image must be aligne to the bottom-right corner of the tabs area.
Rectangle destRect = new Rectangle(
tabControl.Right - tabControl.BackgroundImage.Width + tabControl.BackImageOffsetX - this.Left,
0,
tabControl.BackgroundImage.Width,
height);
ImageAttributes imageAttributes = new ImageAttributes();
graphics.DrawImage(
tabControl.BackgroundImage,
destRect,
0,
tabControl.BackImageOffsetY + this.Top,
tabControl.BackgroundImage.Width,
height,
GraphicsUnit.Pixel,
imageAttributes);
}
// Create button border path
using (GraphicsPath buttonPath = new GraphicsPath())
{
// Left vertical line
buttonPath.AddLine(
this.ClientRectangle.X,
this.ClientRectangle.Bottom,
this.ClientRectangle.X,
this.ClientRectangle.Y + radius);
// Top left arc
buttonPath.AddArc(
this.ClientRectangle.X,
this.ClientRectangle.Y,
2 * radius,
2 * radius,
180,
90);
// Top horizontal line
buttonPath.AddLine(
this.ClientRectangle.X + radius,
this.ClientRectangle.Y,
this.ClientRectangle.Right - radius,
this.ClientRectangle.Y);
// Top right arc
buttonPath.AddArc(
this.ClientRectangle.Right - 1 - 2 * radius,
this.ClientRectangle.Y,
2 * radius,
2 * radius,
270,
90);
// Right vertical line
buttonPath.AddLine(
this.ClientRectangle.Right - 1,
this.ClientRectangle.Y + radius,
this.ClientRectangle.Right - 1,
this.ClientRectangle.Bottom);
// Bottom horizontal line
if (!this.SelectedTab)
{
buttonPath.AddLine(
this.ClientRectangle.X,
this.ClientRectangle.Bottom - 1,
this.ClientRectangle.Right,
this.ClientRectangle.Bottom - 1);
}
// Fill button background
if (this.SelectedTab)
{
Rectangle brushRect = this.ClientRectangle;
using (LinearGradientBrush backBrush = new LinearGradientBrush(brushRect, this.selectedGradientBackColor, this.BackColor, 90))
{
Blend blend = new Blend(3);
blend.Positions[0] = 0.0f;
blend.Positions[1] = 0.8f;
blend.Positions[2] = 1.0f;
blend.Factors[0] = 0.0f;
blend.Factors[1] = 1.0f;
blend.Factors[2] = 1.0f;
backBrush.Blend = blend;
graphics.FillPath(backBrush, buttonPath);
}
}
else
{
using (SolidBrush backBrush = new SolidBrush((this.SelectedTab) ? this.BackColor : nonSelectedBackColor))
{
graphics.FillPath(backBrush, buttonPath);
}
}
// Draw button border using Anti-Aliasing
using (Pen pen = new Pen(this.borderColor, 1))
{
SmoothingMode oldMode = graphics.SmoothingMode;
graphics.SmoothingMode = SmoothingMode.AntiAlias;
graphics.DrawPath(pen, buttonPath);
graphics.SmoothingMode = oldMode;
}
}
}
