private void EnsureTypographyList(TypographyHandler typographyHandler)
{
if (!needRefreshTypographyList)
{
return;
}
textLayout.DrawToTextRenderer(typographyHandler, 0, 0);
TypographyOptions = typographyHandler.TypographyOptions;
TypographyFeatureInfo previousOption = CurrentTypographyOption;
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs("TypographyOptions"));
}
if (TypographyOptions.Contains(previousOption))
{
CurrentTypographyOption = previousOption;
}
else
{
CurrentTypographyOption = new TypographyFeatureInfo(CanvasTypographyFeatureName.None);
}
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs("CurrentTypographyOption"));
}
needRefreshTypographyList = false;
}
private void Canvas_Draw(CanvasControl sender, CanvasDrawEventArgs args)
{
EnsureResources(sender, sender.Size);
currentDrawingSession = args.DrawingSession;
bool needsTypographyHandler = needRefreshTypographyList || HighlightTypographyAffectedGlyphs;
TypographyHandler typographyHandler = needsTypographyHandler ? new TypographyHandler(testString) : null;
EnsureTypographyList(typographyHandler);
EnsureTypography();
args.DrawingSession.DrawTextLayout(textLayout, 0, 0, Colors.LightBlue);
if (HighlightTypographyAffectedGlyphs && CurrentTypographyOption.Name != CanvasTypographyFeatureName.None)
{
typographyHandler.CurrentMode = TypographyHandler.Mode.Highlight;
typographyHandler.FeatureToHighlight = CurrentTypographyOption.Name;
textLayout.DrawToTextRenderer(typographyHandler, 0, 0);
}
}
private void EnsureTypographyList(TypographyHandler typographyHandler)
{
if (!needRefreshTypographyList)
return;
textLayout.DrawToTextRenderer(typographyHandler, 0, 0);
TypographyOptions = typographyHandler.TypographyOptions;
TypographyFeatureInfo previousOption = CurrentTypographyOption;
if (PropertyChanged != null)
PropertyChanged(this, new PropertyChangedEventArgs("TypographyOptions"));
if (TypographyOptions.Contains(previousOption))
CurrentTypographyOption = previousOption;
else
CurrentTypographyOption = new TypographyFeatureInfo(CanvasTypographyFeatureName.None);
if (PropertyChanged != null)
PropertyChanged(this, new PropertyChangedEventArgs("CurrentTypographyOption"));
needRefreshTypographyList = false;
}
