/// <summary>
/// Initializes a new LabelStyle
/// </summary>
public LabelStyle()
{
Font = new Font { FontFamily = "Verdana", Size = 12 };
Offset = new Offset { X = 0, Y = 0 };
CollisionDetection = false;
CollisionBuffer = new Size { Width = 0, Height = 0 };
ForeColor = Color.Black;
BackColor = new Brush { Color = Color.White };
HorizontalAlignment = HorizontalAlignmentEnum.Center;
VerticalAlignment = VerticalAlignmentEnum.Center;
}
public LabelStyle(LabelStyle labelStyle)
{
Font = new Font(labelStyle.Font);
Offset = new Offset(labelStyle.Offset);
CollisionDetection = false;
CollisionBuffer = new Size(labelStyle.CollisionBuffer);
ForeColor = new Color(labelStyle.ForeColor);
BackColor = new Brush(labelStyle.BackColor);
HorizontalAlignment = HorizontalAlignmentEnum.Center;
VerticalAlignment = VerticalAlignmentEnum.Center;
}
private static Label CreateLabel(IGeometry feature, string text, float rotation, int priority, LabelStyle style, IViewport viewport,
Graphics g, LabelLayer labelTheme)
{
SizeF gdiSize = g.MeasureString(text, style.Font.Convert());
var size = new Mapsui.Styles.Size {
Width = gdiSize.Width, Height = gdiSize.Height
};
Mapsui.Geometries.Point position = viewport.WorldToScreen(feature.GetBoundingBox().GetCentroid());
position.X = position.X - size.Width * (short)style.HorizontalAlignment * 0.5f;
position.Y = position.Y - size.Height * (short)style.VerticalAlignment * 0.5f;
if (position.X - size.Width > viewport.Width || position.X + size.Width < 0 ||
position.Y - size.Height > viewport.Height || position.Y + size.Height < 0)
{
return(null);
}
else
{
Label lbl;
if (!style.CollisionDetection)
{
lbl = new Label(text, position, rotation, priority, null, style);
}
else
{
//Collision detection is enabled so we need to measure the size of the string
lbl = new Label(text, position, rotation, priority,
new LabelBox(position.X - size.Width * 0.5f - style.CollisionBuffer.Width,
position.Y + size.Height * 0.5f + style.CollisionBuffer.Height,
size.Width + 2f * style.CollisionBuffer.Width,
size.Height + style.CollisionBuffer.Height * 2f), style);
}
if (feature.GetType() == typeof(LineString))
{
var line = feature as LineString;
if (line.Length / viewport.Resolution > size.Width) //Only label feature if it is long enough
{
CalculateLabelOnLinestring(line, ref lbl, viewport);
}
else
{
return(null);
}
}
return(lbl);
}
}
public Size(Size size)
{
Width = size.Width;
Height = size.Height;
}
private static Label CreateLabel(IGeometry feature, string text, float rotation, int priority, LabelStyle style, IViewport viewport,
Graphics g, LabelLayer labelTheme)
{
SizeF gdiSize = g.MeasureString(text, style.Font.Convert());
var size = new Mapsui.Styles.Size { Width = gdiSize.Width, Height = gdiSize.Height };
Mapsui.Geometries.Point position = viewport.WorldToScreen(feature.GetBoundingBox().GetCentroid());
position.X = position.X - size.Width * (short)style.HorizontalAlignment * 0.5f;
position.Y = position.Y - size.Height * (short)style.VerticalAlignment * 0.5f;
if (position.X - size.Width > viewport.Width || position.X + size.Width < 0 ||
position.Y - size.Height > viewport.Height || position.Y + size.Height < 0)
return null;
else
{
Label lbl;
if (!style.CollisionDetection)
lbl = new Label(text, position, rotation, priority, null, style);
else
{
//Collision detection is enabled so we need to measure the size of the string
lbl = new Label(text, position, rotation, priority,
new LabelBox(position.X - size.Width * 0.5f - style.CollisionBuffer.Width,
position.Y + size.Height * 0.5f + style.CollisionBuffer.Height,
size.Width + 2f * style.CollisionBuffer.Width,
size.Height + style.CollisionBuffer.Height * 2f), style);
}
if (feature.GetType() == typeof(LineString))
{
var line = feature as LineString;
if (line.Length / viewport.Resolution > size.Width) //Only label feature if it is long enough
CalculateLabelOnLinestring(line, ref lbl, viewport);
else
return null;
}
return lbl;
}
}
