public override void ReadAttributes(XmlTextReader reader)
{
m_Direction = eExpandDirection.Default;
for (int i = 0; i < reader.AttributeCount; i++)
{
reader.MoveToAttribute(i);
if (reader.Name.ToLower() == "direction")
{
string s = reader.Value.ToLower();
if (s == "left")
m_Direction = eExpandDirection.Left;
else if (s == "right")
m_Direction = eExpandDirection.Right;
else if (s == "top")
m_Direction = eExpandDirection.Top;
else if (s == "bottom")
m_Direction = eExpandDirection.Bottom;
else if (s == "popup")
m_Direction = eExpandDirection.PopupDropDown;
break;
}
}
}
/// <summary>
/// Called when ExpandDirection property has changed.
/// </summary>
/// <param name="oldValue">Old property value</param>
/// <param name="newValue">New property value</param>
protected virtual void OnExpandDirectionChanged(eExpandDirection oldValue, eExpandDirection newValue)
{
//OnPropertyChanged(new PropertyChangedEventArgs("ExpandDirection"));
}
private Point[] GetExpandPolygon(Rectangle r, eExpandDirection direction)
{
Point[] p = new Point[3];
switch (direction)
{
case eExpandDirection.Right:
{
p[0].X = r.Left + 1;
p[0].Y = r.Top + (r.Height - m_DefaultSize.Height) / 2 - 1;
p[1].X = p[0].X;
p[1].Y = p[0].Y + 6;
p[2].X = p[0].X + 3;
p[2].Y = p[0].Y + 3;
break;
}
case eExpandDirection.Left:
{
p[0].X = r.Left + 3;
p[0].Y = r.Top + (r.Height - m_DefaultSize.Height) / 2 - 1;
p[1].X = p[0].X;
p[1].Y = p[0].Y + 6;
p[2].X = p[0].X - 3;
p[2].Y = p[0].Y + 3;
break;
}
case eExpandDirection.Top:
{
p[0].X = r.Left - 1;
p[0].Y = r.Top + (r.Height - m_DefaultSize.Height) / 2 + m_DefaultSize.Height;
p[1].X = p[0].X + 6;
p[1].Y = p[0].Y;
p[2].X = p[0].X + 3;
p[2].Y = p[0].Y - 4;
break;
}
case eExpandDirection.Bottom:
case eExpandDirection.PopupDropDown:
{
p[0].X = r.Left;
p[0].Y = r.Top + (r.Height - m_DefaultSize.Height) / 2 + 1;
p[1].X = p[0].X + 5;
p[1].Y = p[0].Y;
p[2].X = p[0].X + 2;
p[2].Y = p[0].Y + 3;
break;
}
}
return p;
}
private void OnExpandedChanged()
{
_ChangingExpanded = true;
try
{
Rectangle startRect = this.Bounds;
Rectangle endRect;
ElementStyle style = GetBackgroundStyle();
int styleWhiteSpace = 0;
if (style != null)
styleWhiteSpace = ElementStyleLayout.VerticalStyleWhiteSpace(style);
if (_Expanded)
{
eExpandDirection direction = GetExpandDirection();
if (direction == eExpandDirection.Bottom)
endRect = new Rectangle(this.Left, this.Top, this.Width, _ItemContainer.HeightInternal + styleWhiteSpace);
else
endRect = new Rectangle(this.Left, this.Top - (_ItemContainer.HeightInternal - _ItemContainer.MainItemsContainer.HeightInternal), this.Width, _ItemContainer.HeightInternal + styleWhiteSpace);
_LastExpandDirection = direction;
}
else
{
if (_LastExpandDirection == eExpandDirection.Bottom)
endRect = new Rectangle(this.Left, this.Top, this.Width, _ItemContainer.MainItemsContainer.HeightInternal + styleWhiteSpace);
else
endRect = new Rectangle(this.Left, this.Top + (_ItemContainer.HeightInternal - _ItemContainer.MainItemsContainer.HeightInternal), this.Width, _ItemContainer.MainItemsContainer.HeightInternal + styleWhiteSpace);
}
if (_AnimationSpeed <= 0 || this.DesignMode)
{
if (this.DesignMode)
TypeDescriptor.GetProperties(this)["Bounds"].SetValue(this, endRect);
else
this.Bounds = endRect;
}
else
BarFunctions.AnimateControl(this, true, _AnimationSpeed, startRect, endRect);
OnExpandedChanged(EventArgs.Empty);
if (_Expanded)
{
if (_AutoCollapse && !this.DesignMode)
TrackAutoCollapse();
}
else
{
if (_AutoCollapse)
StopAutoCollapseTracking();
}
}
finally
{
_ChangingExpanded = false;
}
}
