public void ChangeBackgroundColor(Color backgroundColor)
{
if (elem == null)
{
return;
}
BoxSpec boxSpec = elem.Spec;
if (boxSpec.BackgroundColor == backgroundColor)
{
return;
}
var existingRuleSet = elem.ElementRuleSet;
if (existingRuleSet == null)
{
//create new one
elem.ElementRuleSet = existingRuleSet = new CssRuleSet();
elem.IsStyleEvaluated = false;
}
//-------------------------------------
existingRuleSet.RemoveCssProperty(WellknownCssPropertyName.BackgroundColor);
existingRuleSet.AddCssCodeProperty(
new CssPropertyDeclaration(
WellknownCssPropertyName.BackgroundColor,
new CssCodeColor(CssColorConv.ConvertToCssColor(backgroundColor))));
elem.SkipPrincipalBoxEvalulation = false;
CssBox cssbox = HtmlElement.InternalGetPrincipalBox(elem);
if (cssbox != null)
{
#if DEBUG
cssbox.dbugMark1++;
#endif
CssBox.InvalidateComputeValue(cssbox);
}
HtmlElement.InvokeNotifyChangeOnIdleState(
elem,
ElementChangeKind.Spec);
InvalidateCssBox(cssbox);
}