// Standard UIView drawRect override that uses Core Text to draw our text contents
public override void Draw(CGRect rect)
{
// First draw selection / marked text, then draw text
DrawRangeAsSelection(SelectedTextRange);
DrawRangeAsSelection(MarkedTextRange);
frame.Draw(UIGraphics.GetCurrentContext());
}
void drawLabel(CGContext ctx, CGRect rect, nfloat yCoord, nfloat xCoord, UITextAlignment alignment, string label, bool flipContext = true, bool centerVertical = false)
{
// Draw light the sunrise and Sunset labels at the ends of the light box
using (UIColor fontColor = UIColor.White, shadowColor = UIColor.Black.ColorWithAlpha(0.1f)) {
var fontAttributes = new UIFontAttributes(new UIFontFeature(CTFontFeatureNumberSpacing.Selector.ProportionalNumbers));
using (var desc = UIFont.SystemFontOfSize(fontSize).FontDescriptor.CreateWithAttributes(fontAttributes)) {
using (UIFont font = UIFont.FromDescriptor(desc, fontSize)) {
// calculating the range of our attributed string
var range = new NSRange(0, label.Length);
// set justification for text block
using (var alignStyle = new NSMutableParagraphStyle {
Alignment = alignment
}) {
// add stylistic attributes to out attributed string
var stringAttributes = new UIStringAttributes {
ForegroundColor = fontColor,
Font = font,
ParagraphStyle = alignStyle
};
var target = new CGSize(float.MaxValue, float.MaxValue);
NSRange fit;
using (NSMutableAttributedString attrString = new NSMutableAttributedString(label, stringAttributes)) {
//creating a container for out attributed string
using (CTFramesetter framesetter = new CTFramesetter(attrString)) {
CGSize frameSize = framesetter.SuggestFrameSize(range, null, target, out fit);
if (alignment == UITextAlignment.Center)
{
xCoord -= (frameSize.Width / 2);
}
if (alignment == UITextAlignment.Right)
{
xCoord -= frameSize.Width;
}
// subtract the frameSize so the flipped context behaves as expected
yCoord -= frameSize.Height;
if (centerVertical)
{
yCoord += (frameSize.Height / 2);
}
var textRect = new CGRect(xCoord, yCoord, frameSize.Width, frameSize.Height);
using (CGPath path = new CGPath()) {
path.AddRect(textRect);
ctx.SetShadow(new CGSize(0.0f, 1.0f), 0.0f, shadowColor.CGColor);
using (CTFrame frame = framesetter.GetFrame(range, path, null)) {
if (flipContext)
{
ctx.SaveState();
ctx.TranslateCTM(0, rect.Height);
ctx.ScaleCTM(1, -1);
frame.Draw(ctx);
ctx.RestoreState();
}
else
{
frame.Draw(ctx);
}
}
}
}
}
}
}
}
}
}
