/// <summary>
/// Create a new <c>XPPanelPropertyChangeArgs</c> with the specified
/// property enumeration value
/// </summary>
/// <param name="property"></param>
public XPPanelPropertyChangeEventArgs(XPPanelProperties property)
{
this.xpPanelProperty = property ;
}
/// <summary>
/// Preprocessor for <see cref="PropertyChange"/> events
/// </summary>
/// <param name="xpPanelProperty">The property that changed</param>
/// <remarks>
/// Look at each property change and invalidate cached GDI+ objects
/// as necessary.
/// </remarks>
protected virtual void OnPropertyChange(XPPanelProperties xpPanelProperty)
{
switch(xpPanelProperty) {
case XPPanelProperties.HorzAlignmentProperty:
case XPPanelProperties.VertAlignmentProperty:
MeasureTextFormat = null ;
DrawTextFormat = null ;
break ;
case XPPanelProperties.TextColorsProperty:
FontBrush = null ;
break ;
case XPPanelProperties.TextHighlightColorsProperty:
FontHighlightBrush = null ;
break ;
case XPPanelProperties.CaptionGradientProperty:
case XPPanelProperties.CaptionGradientModeProperty:
case XPPanelProperties.GradientOffsetProperty:
case XPPanelProperties.CaptionCornerTypeProperty:
CaptionBrush = null ;
break ;
case XPPanelProperties.FontProperty:
DisabledFont = null ;
isLayoutDirty = true ;
break ;
case XPPanelProperties.CaptionProperty:
case XPPanelProperties.SpacingProperty:
case XPPanelProperties.CurveRadiusProperty:
case XPPanelProperties.FitToImageProperty:
case XPPanelProperties.XPPanelStyleProperty:
case XPPanelProperties.PanelHeightProperty:
isLayoutDirty = true ;
break ;
case XPPanelProperties.CaptionUnderlineProperty:
CaptionUnderlinePen = null ;
// this may not be necessary, but its hard to tell without more logic
isLayoutDirty = true ;
break ;
case XPPanelProperties.PanelGradientProperty:
case XPPanelProperties.PanelGradientModeProperty:
PanelBrush = null ;
break ;
case XPPanelProperties.IsFixedHeightProperty:
if (IsFixedHeight) {
PanelState = XPPanelState.Expanded ;
}
break ;
case XPPanelProperties.PanelStateProperty:
case XPPanelProperties.ExpandedGlyphsProperty:
case XPPanelProperties.CollapsedGlyphsProperty:
break ;
case XPPanelProperties.EnabledProperty:
CaptionBrush = null ;
PanelBrush = null ;
CaptionUnderlinePen = null ;
break ;
case XPPanelProperties.DisabledOpacityProperty:
if (!Enabled) {
Invalidate() ;
}
break ;
}
// forward the event to listeners
if (propertyChangeListeners != null) {
propertyChangeListeners(this,new XPPanelPropertyChangeEventArgs(xpPanelProperty)) ;
}
// invalidate the control
Invalidate() ;
}
