public override Carto.Graphics.Bitmap OnDrawPopup(PopupDrawInfo popupDrawInfo)
{
PopupStyle style = popupDrawInfo.Popup.Style;
// Calculate scaled dimensions
float DPToPX = popupDrawInfo.DPToPX;
float PXTODP = 1 / DPToPX;
if (style.ScaleWithDPI)
{
DPToPX = 1;
}
else
{
PXTODP = 1;
}
float screenWidth = popupDrawInfo.ScreenBounds.GetWidth() * PXTODP;
float screenHeight = popupDrawInfo.ScreenBounds.GetHeight() * PXTODP;
// Update sizes based on scale (uses extension method, cf. Shared/Extensions
int fontSize = FontSize.Update(DPToPX);
int triangleWidth = TriangleSize.Update(DPToPX);
int triangleHeight = TriangleSize.Update(DPToPX);
int strokeWidth = StrokeWidth.Update(DPToPX);
int screenPadding = ScreenPadding.Update(DPToPX);
// Set font
var font = Android.Graphics.Typeface.Create("HelveticaNeue-Light", Android.Graphics.TypefaceStyle.Normal);
// Calculate the maximum popup size, adjust with dpi
int maxPopupWidth = (int)(Math.Min(screenWidth, screenHeight));
float halfStrokeWidth = strokeWidth * 0.5f;
int maxTextWidth = maxPopupWidth - (2 * screenPadding + strokeWidth);
// Measure text
TextPaint textPaint = new TextPaint { Color = TextColor, TextSize = fontSize };
textPaint.SetTypeface(font);
var textLayout = new StaticLayout(text, textPaint, maxTextWidth, Layout.Alignment.AlignNormal, 1, 0, false);
int textX = (int)Math.Min(textPaint.MeasureText(text), textLayout.Width);
int textY = textLayout.Height;
int popupWidth = textX + (2 * PopupPadding + strokeWidth + triangleWidth);
int popupHeight = textY + (2 * PopupPadding + strokeWidth);
var bitmap = Android.Graphics.Bitmap.CreateBitmap(popupWidth, popupHeight, Android.Graphics.Bitmap.Config.Argb8888);
var canvas = new Android.Graphics.Canvas(bitmap);
var trianglePath = new Android.Graphics.Path();
trianglePath.MoveTo(triangleWidth, 0);
trianglePath.LineTo(halfStrokeWidth, triangleHeight * 0.5f);
trianglePath.LineTo(triangleWidth, triangleHeight);
trianglePath.Close();
int triangleOffsetX = 0;
int triangleOffsetY = (popupHeight - triangleHeight) / 2;
// Create paint object
var paint = new Android.Graphics.Paint();
paint.AntiAlias = true;
paint.SetStyle(Android.Graphics.Paint.Style.Stroke);
paint.StrokeWidth = strokeWidth;
paint.Color = StrokeColor;
// Stroke background
var background = new Android.Graphics.RectF();
background.Left = triangleWidth;
background.Top = halfStrokeWidth;
background.Right = popupWidth - strokeWidth;
background.Bottom = popupHeight - strokeWidth;
canvas.DrawRect(background, paint);
// Stroke triangle
canvas.Save();
canvas.Translate(triangleOffsetX, triangleOffsetY);
canvas.DrawPath(trianglePath, paint);
canvas.Restore();
// Fill background
paint.SetStyle(Android.Graphics.Paint.Style.Fill);
paint.Color = BackgroundColor;
canvas.DrawRect(background, paint);
// Fill triangle
canvas.Save();
canvas.Translate(triangleOffsetX, triangleOffsetY);
canvas.DrawPath(trianglePath, paint);
canvas.Restore();
if (textLayout != null)
{
// Draw text
canvas.Save();
canvas.Translate(halfStrokeWidth + triangleWidth + PopupPadding, halfStrokeWidth + PopupPadding);
textLayout.Draw(canvas);
canvas.Restore();
}
return BitmapUtils.CreateBitmapFromAndroidBitmap(bitmap);
}
public override Carto.Graphics.Bitmap OnDrawPopup(PopupDrawInfo popupDrawInfo)
{
PopupStyle style = popupDrawInfo.Popup.Style;
// Calculate scaled dimensions
float DPToPX = popupDrawInfo.DPToPX;
float PXTODP = 1 / DPToPX;
if (style.ScaleWithDPI)
{
DPToPX = 1;
}
else
{
PXTODP = 1;
}
float screenWidth = popupDrawInfo.ScreenBounds.GetWidth() * PXTODP;
float screenHeight = popupDrawInfo.ScreenBounds.GetHeight() * PXTODP;
// Update sizes based on scale (uses extension method, cf. Shared/Extensions
int fontSize = FontSize.Update(DPToPX);
int triangleWidth = TriangleSize.Update(DPToPX);
int triangleHeight = TriangleSize.Update(DPToPX);
int strokeWidth = StrokeWidth.Update(DPToPX);
int screenPadding = ScreenPadding.Update(DPToPX);
// Set font
var font = Android.Graphics.Typeface.Create("HelveticaNeue-Light", Android.Graphics.TypefaceStyle.Normal);
// Calculate the maximum popup size, adjust with dpi
int maxPopupWidth = (int)(Math.Min(screenWidth, screenHeight));
float halfStrokeWidth = strokeWidth * 0.5f;
int maxTextWidth = maxPopupWidth - (2 * screenPadding + strokeWidth);
// Measure text
TextPaint textPaint = new TextPaint {
Color = TextColor, TextSize = fontSize
};
textPaint.SetTypeface(font);
var textLayout = new StaticLayout(text, textPaint, maxTextWidth, Layout.Alignment.AlignNormal, 1, 0, false);
int textX = (int)Math.Min(textPaint.MeasureText(text), textLayout.Width);
int textY = textLayout.Height;
int popupWidth = textX + (2 * PopupPadding + strokeWidth + triangleWidth);
int popupHeight = textY + (2 * PopupPadding + strokeWidth);
var bitmap = Android.Graphics.Bitmap.CreateBitmap(popupWidth, popupHeight, Android.Graphics.Bitmap.Config.Argb8888);
var canvas = new Android.Graphics.Canvas(bitmap);
var trianglePath = new Android.Graphics.Path();
trianglePath.MoveTo(triangleWidth, 0);
trianglePath.LineTo(halfStrokeWidth, triangleHeight * 0.5f);
trianglePath.LineTo(triangleWidth, triangleHeight);
trianglePath.Close();
int triangleOffsetX = 0;
int triangleOffsetY = (popupHeight - triangleHeight) / 2;
// Create paint object
var paint = new Android.Graphics.Paint();
paint.AntiAlias = true;
paint.SetStyle(Android.Graphics.Paint.Style.Stroke);
paint.StrokeWidth = strokeWidth;
paint.Color = StrokeColor;
// Stroke background
var background = new Android.Graphics.RectF();
background.Left = triangleWidth;
background.Top = halfStrokeWidth;
background.Right = popupWidth - strokeWidth;
background.Bottom = popupHeight - strokeWidth;
canvas.DrawRect(background, paint);
// Stroke triangle
canvas.Save();
canvas.Translate(triangleOffsetX, triangleOffsetY);
canvas.DrawPath(trianglePath, paint);
canvas.Restore();
// Fill background
paint.SetStyle(Android.Graphics.Paint.Style.Fill);
paint.Color = BackgroundColor;
canvas.DrawRect(background, paint);
// Fill triangle
canvas.Save();
canvas.Translate(triangleOffsetX, triangleOffsetY);
canvas.DrawPath(trianglePath, paint);
canvas.Restore();
if (textLayout != null)
{
// Draw text
canvas.Save();
canvas.Translate(halfStrokeWidth + triangleWidth + PopupPadding, halfStrokeWidth + PopupPadding);
textLayout.Draw(canvas);
canvas.Restore();
}
return(BitmapUtils.CreateBitmapFromAndroidBitmap(bitmap));
}
public override Bitmap OnDrawPopup(PopupDrawInfo popupDrawInfo)
{
string text = "Custom Popup";
PopupStyle style = popupDrawInfo.Popup.Style;
// Calculate scaled dimensions
float DPToPX = popupDrawInfo.DPToPX;
float PXTODP = 1 / DPToPX;
if (style.ScaleWithDPI)
{
DPToPX = 1;
}
else
{
PXTODP = 1;
}
float screenWidth = popupDrawInfo.ScreenBounds.GetWidth() * PXTODP;
float screenHeight = popupDrawInfo.ScreenBounds.GetHeight() * PXTODP;
// Update sizes based on scale (uses extension method, cf. Shared/Extensions
int fontSize = FontSize.Update(DPToPX);
int triangleWidth = TriangleSize.Update(DPToPX);
int triangleHeight = TriangleSize.Update(DPToPX);
int strokeWidth = StrokeWidth.Update(DPToPX);
int screenPadding = ScreenPadding.Update(DPToPX);
UIFont font = UIFont.FromName("HelveticaNeue-Light", fontSize);
// Calculate the maximum popup size, adjust with dpi
float maxPopupWidth = Math.Min(screenWidth, screenHeight);
// Calculate maximum text and description width
float halfStrokeWidth = strokeWidth * 0.5f;
float maxTextWidth = maxPopupWidth - (2 * screenPadding + strokeWidth);
CGSize textSize = text.StringSize(font, new CGSize(maxTextWidth, nfloat.MaxValue));
// Calculate bitmap size
nfloat popupWidth = textSize.Width + 2 * PopupPadding + strokeWidth + triangleWidth;
nfloat popupHeight = textSize.Height + 2 * PopupPadding + strokeWidth;
CGSize popupSize = new CGSize(popupWidth, popupHeight);
// Create graphics context;
UIGraphics.BeginImageContext(popupSize);
CGContext context = UIGraphics.GetCurrentContext();
CGRect backgroundStrokeRect = new CGRect(
triangleWidth,
halfStrokeWidth,
popupWidth - (strokeWidth + triangleWidth),
popupHeight - strokeWidth
);
UIBezierPath backgroundPath = UIBezierPath.FromRoundedRect(backgroundStrokeRect, 1);
backgroundPath.LineWidth = strokeWidth;
// Prepare triangle path
CGPath trianglePath = new CGPath();
trianglePath.MoveToPoint(triangleWidth, 0);
trianglePath.AddLineToPoint(halfStrokeWidth, triangleHeight * 0.5f);
trianglePath.AddLineToPoint(triangleWidth, triangleHeight);
trianglePath.CloseSubpath();
// Calculate anchor point and triangle position
nfloat triangleOffsetX = 0;
nfloat triangleOffsetY = (popupHeight - triangleHeight) / 2;
// Stroke background
StrokeColor.SetStroke();
backgroundPath.Stroke();
// Stroke triangle
context.SaveState();
context.TranslateCTM(triangleOffsetX, triangleOffsetY);
context.SetLineWidth(strokeWidth);
context.AddPath(trianglePath);
context.SetStrokeColor(StrokeColor.CGColor);
context.StrokePath();
context.RestoreState();
// Fill background
BackgroundColor.SetFill();
backgroundPath.Fill();
// Fill triangle
context.SaveState();
context.TranslateCTM(triangleOffsetX, triangleOffsetY);
context.AddPath(trianglePath);
context.SetFillColor(BackgroundColor.CGColor);
context.FillPath();
context.RestoreState();
// Draw text
context.SetFillColor(TextColor.CGColor);
CGRect textRect = new CGRect(
halfStrokeWidth + PopupPadding + triangleWidth,
PopupPadding,
textSize.Width,
textSize.Height
);
text.DrawString(textRect, font, UILineBreakMode.WordWrap);
// Extract image
UIImage image = UIGraphics.GetImageFromCurrentImageContext();
// Clean up
UIGraphics.EndImageContext();
return(BitmapUtils.CreateBitmapFromUIImage(image));
}
