public static void Draw(SKCanvas canvas, double screenWidth, double screenHeight, ScaleBarWidget scaleBar,
float layerOpacity)
{
// If this widget belongs to no viewport, than stop drawing
if (scaleBar.Map?.CRS == null)
{
return;
}
if (scaleBar.Map.Transformation == null)
{
return;
}
if (scaleBar.Map.Transformation.IsProjectionSupported(scaleBar.Map.CRS, "EPSG:4326") != true)
{
return;
}
// If this is the first time, we call this renderer, ...
if (_paintScaleBar == null)
{
// ... than create the paints
_paintScaleBar = CreateScaleBarPaint(scaleBar.TextColor.ToSkia(layerOpacity), StrokeInternal, SKPaintStyle.Fill, scaleBar.Scale);
_paintScaleBarStroke = CreateScaleBarPaint(scaleBar.Halo.ToSkia(layerOpacity), StrokeExternal, SKPaintStyle.Stroke, scaleBar.Scale);
_paintScaleText = CreateTextPaint(scaleBar.TextColor.ToSkia(layerOpacity), 2, SKPaintStyle.Fill, scaleBar.Scale);
_paintScaleTextStroke = CreateTextPaint(scaleBar.Halo.ToSkia(layerOpacity), 2, SKPaintStyle.Stroke, scaleBar.Scale);
}
else
{
// Update paints with new values
_paintScaleBar.Color = scaleBar.TextColor.ToSkia(layerOpacity);
_paintScaleBar.StrokeWidth = StrokeInternal * scaleBar.Scale;
_paintScaleBarStroke.Color = scaleBar.Halo.ToSkia(layerOpacity);
_paintScaleBarStroke.StrokeWidth = StrokeExternal * scaleBar.Scale;
_paintScaleText.Color = scaleBar.TextColor.ToSkia(layerOpacity);
_paintScaleText.StrokeWidth = StrokeInternal * scaleBar.Scale;
_paintScaleText.Typeface = SKTypeface.FromFamilyName(scaleBar.Font.FontFamily, SKTypefaceStyle.Bold);
_paintScaleText.TextSize = (float)scaleBar.Font.Size * scaleBar.Scale;
_paintScaleTextStroke.Color = scaleBar.Halo.ToSkia(layerOpacity);
_paintScaleTextStroke.StrokeWidth = StrokeInternal * scaleBar.Scale;
_paintScaleTextStroke.Typeface = SKTypeface.FromFamilyName(scaleBar.Font.FontFamily, SKTypefaceStyle.Bold);
_paintScaleTextStroke.TextSize = (float)scaleBar.Font.Size * scaleBar.Scale;
}
float scaleBarLength1;
string scaleBarText1;
float scaleBarLength2;
string scaleBarText2;
(scaleBarLength1, scaleBarText1, scaleBarLength2, scaleBarText2) = scaleBar.GetScaleBarLengthAndText();
// Calc height of scale bar
SKRect textSize = SKRect.Empty;
// Do this, because height of text changes sometimes (e.g. from 2 m to 1 m)
_paintScaleTextStroke.MeasureText("9999 m", ref textSize);
var scaleBarHeight = textSize.Height + (scaleBar.TickLength + StrokeExternal * 0.5f + scaleBar.TextMargin) * scaleBar.Scale;
if (scaleBar.ScaleBarMode == ScaleBarMode.Both && scaleBar.SecondaryUnitConverter != null)
{
scaleBarHeight *= 2;
}
else
{
scaleBarHeight += StrokeExternal * 0.5f * scaleBar.Scale;
}
scaleBar.Height = scaleBarHeight;
// Draw lines
// Get lines for scale bar
var points = scaleBar.GetScaleBarLinePositions(scaleBarLength1, scaleBarLength2, StrokeExternal);
// BoundingBox for scale bar
BoundingBox envelop = new BoundingBox();
if (points != null)
{
// Draw outline of scale bar
for (int i = 0; i < points.Length; i += 2)
{
canvas.DrawLine((float)points[i].X, (float)points[i].Y, (float)points[i + 1].X, (float)points[i + 1].Y, _paintScaleBarStroke);
}
// Draw scale bar
for (int i = 0; i < points.Length; i += 2)
{
canvas.DrawLine((float)points[i].X, (float)points[i].Y, (float)points[i + 1].X, (float)points[i + 1].Y, _paintScaleBar);
}
envelop = points[0].GetBoundingBox();
for (int i = 1; i < points.Length; i++)
{
envelop = envelop.Join(points[i].GetBoundingBox());
}
envelop = envelop.Grow(StrokeExternal * 0.5f * scaleBar.Scale);
}
// Draw text
// Calc text height
SKRect textSize1 = SKRect.Empty;
SKRect textSize2 = SKRect.Empty;
scaleBarText1 = scaleBarText1 ?? string.Empty;
scaleBarText2 = scaleBarText2 ?? string.Empty;
_paintScaleTextStroke.MeasureText(scaleBarText1, ref textSize1);
_paintScaleTextStroke.MeasureText(scaleBarText2, ref textSize2);
var(posX1, posY1, posX2, posY2) = scaleBar.GetScaleBarTextPositions(textSize.ToMapsui(), textSize1.ToMapsui(), textSize2.ToMapsui(), StrokeExternal);
// Now draw text
canvas.DrawText(scaleBarText1, posX1, posY1 - textSize1.Top, _paintScaleTextStroke);
canvas.DrawText(scaleBarText1, posX1, posY1 - textSize1.Top, _paintScaleText);
envelop = envelop.Join(new BoundingBox(posX1, posY1, posX1 + textSize1.Width, posY1 + textSize1.Height));
if (scaleBar.ScaleBarMode == ScaleBarMode.Both && scaleBar.SecondaryUnitConverter != null)
{
// Now draw second text
canvas.DrawText(scaleBarText2, posX2, posY2 - textSize2.Top, _paintScaleTextStroke);
canvas.DrawText(scaleBarText2, posX2, posY2 - textSize2.Top, _paintScaleText);
envelop = envelop.Join(new BoundingBox(posX2, posY2, posX2 + textSize2.Width, posY2 + textSize2.Height));
}
scaleBar.Envelope = envelop;
if (scaleBar.ShowEnvelop)
{
// Draw a rect around the scale bar for testing
var tempPaint = _paintScaleTextStroke;
canvas.DrawRect(new SKRect((float)envelop.MinX, (float)envelop.MinY, (float)envelop.MaxX, (float)envelop.MaxY), tempPaint);
}
}
public static void Draw(Canvas canvas, ScaleBarWidget scaleBar)
{
// If this widget belongs to no viewport, than stop drawing
if (scaleBar.Map?.CRS == null)
{
return;
}
if (scaleBar.Map.Transformation == null)
{
return;
}
if (scaleBar.Map.Transformation.IsProjectionSupported(scaleBar.Map.CRS, "EPSG:4326") != true)
{
return;
}
_brushScaleBar = new SolidColorBrush(scaleBar.TextColor.ToXaml());
_brushScaleBarStroke = new SolidColorBrush(scaleBar.Halo.ToXaml());
_brushScaleText = new SolidColorBrush(scaleBar.TextColor.ToXaml());
_brushScaleTextStroke = new SolidColorBrush(scaleBar.Halo.ToXaml());
var textBlock = new OutlinedTextBlock();
textBlock.Text = "9999 m";
textBlock.Fill = _brushScaleText;
textBlock.Stroke = _brushScaleTextStroke;
textBlock.StrokeThickness = StrokeExternal - StrokeInternal + 1;
textBlock.FontFamily = new FontFamily(scaleBar.Font.FontFamily);
textBlock.FontSize = scaleBar.Font.Size;
textBlock.FontWeight = FontWeights.Bold;
float scaleBarLength1;
string scaleBarText1;
float scaleBarLength2;
string scaleBarText2;
(scaleBarLength1, scaleBarText1, scaleBarLength2, scaleBarText2) = scaleBar.GetScaleBarLengthAndText();
// Calc height of scale bar
Size textSize;
// Do this, because height of text changes sometimes (e.g. from 2 m to 1 m)
textSize = textBlock.MeasureText();
var scaleBarHeight = textSize.Height + (scaleBar.TickLength + StrokeExternal * 0.5f + scaleBar.TextMargin) * scaleBar.Scale;
if (scaleBar.ScaleBarMode == ScaleBarMode.Both && scaleBar.SecondaryUnitConverter != null)
{
scaleBarHeight *= 2;
}
else
{
scaleBarHeight += StrokeExternal * 0.5f * scaleBar.Scale;
}
scaleBar.Height = (float)scaleBarHeight;
// Draw lines
// Get lines for scale bar
var points = scaleBar.GetScaleBarLinePositions(scaleBarLength1, scaleBarLength2, StrokeExternal);
// BoundingBox for scale bar
BoundingBox envelop = new BoundingBox();
if (points != null)
{
// Draw outline of lines
for (int i = 0; i < points.Length; i += 2)
{
var line = new Line();
line.X1 = points[i].X;
line.Y1 = points[i].Y;
line.X2 = points[i + 1].X;
line.Y2 = points[i + 1].Y;
line.Stroke = _brushScaleBarStroke;
line.StrokeThickness = StrokeExternal;
line.StrokeStartLineCap = PenLineCap.Square;
line.StrokeEndLineCap = PenLineCap.Square;
canvas.Children.Add(line);
}
// Draw lines
for (int i = 0; i < points.Length; i += 2)
{
var line = new Line();
line.X1 = points[i].X;
line.Y1 = points[i].Y;
line.X2 = points[i + 1].X;
line.Y2 = points[i + 1].Y;
line.Stroke = _brushScaleBar;
line.StrokeThickness = StrokeInternal;
line.StrokeStartLineCap = PenLineCap.Square;
line.StrokeEndLineCap = PenLineCap.Square;
canvas.Children.Add(line);
}
envelop = points[0].GetBoundingBox();
for (int i = 1; i < points.Length; i++)
{
envelop = envelop.Join(points[i].GetBoundingBox());
}
envelop = envelop.Grow(StrokeExternal * 0.5f * scaleBar.Scale);
}
// Draw text
// Calc text height
Size textSize1;
Size textSize2;
scaleBarText1 = scaleBarText1 ?? string.Empty;
scaleBarText2 = scaleBarText2 ?? string.Empty;
textBlock.Text = scaleBarText1;
textSize1 = textBlock.MeasureText();
textBlock.Text = scaleBarText2;
textSize2 = textBlock.MeasureText();
var boundingBoxText = new BoundingBox(0, 0, textSize.Width, textSize.Height);
var boundingBoxText1 = new BoundingBox(0, 0, textSize1.Width, textSize1.Height);
var boundingBoxText2 = new BoundingBox(0, 0, textSize2.Width, textSize2.Height);
var(posX1, posY1, posX2, posY2) = scaleBar.GetScaleBarTextPositions(boundingBoxText, boundingBoxText1, boundingBoxText2, StrokeExternal);
// Now draw text
textBlock.Text = scaleBarText1;
textBlock.Width = textSize1.Width;
textBlock.Height = textSize1.Height;
Canvas.SetLeft(textBlock, posX1);
Canvas.SetTop(textBlock, posY1);
canvas.Children.Add(textBlock);
envelop = envelop.Join(new BoundingBox(posX1, posY1, posX1 + textSize1.Width, posY1 + textSize1.Height));
if (scaleBar.ScaleBarMode == ScaleBarMode.Both && scaleBar.SecondaryUnitConverter != null)
{
textBlock = new OutlinedTextBlock();
textBlock.Fill = _brushScaleText;
textBlock.Stroke = _brushScaleTextStroke;
textBlock.StrokeThickness = StrokeExternal - StrokeInternal + 1;
textBlock.FontFamily = new FontFamily(scaleBar.Font.FontFamily);
textBlock.FontSize = scaleBar.Font.Size;
textBlock.FontWeight = FontWeights.Bold;
textBlock.Text = scaleBarText2;
textBlock.Width = textSize2.Width;
textBlock.Height = textSize2.Height;
Canvas.SetLeft(textBlock, posX2);
Canvas.SetTop(textBlock, posY2);
canvas.Children.Add(textBlock);
envelop = envelop.Join(new BoundingBox(posX2, posY2, posX2 + textSize2.Width, posY2 + textSize2.Height));
}
scaleBar.Envelope = envelop;
if (scaleBar.ShowEnvelop)
{
// Draw a rect around the scale bar for testing
var rect = new Rectangle();
rect.Width = envelop.MaxX - envelop.MinX;
rect.Height = envelop.MaxY - envelop.MinY;
rect.Stroke = _brushScaleTextStroke;
rect.StrokeThickness = 1;
Canvas.SetLeft(rect, envelop.MinX);
Canvas.SetTop(rect, envelop.MinY);
canvas.Children.Add(rect);
}
}