/// <summary>
/// Returns a polygon that defines the bounding box of
/// the text, taking into account alignment and rotation parameters.
/// </summary>
/// <param name="g">
/// A graphic device object to be drawn into. This is normally e.Graphics from the
/// PaintEventArgs argument to the Paint() method.
/// </param>
/// <param name="text">A string value containing the text to be
/// displayed. This can be multiple lines, separated by newline ('\n')
/// characters</param>
/// <param name="x">The X location to display the text, in screen
/// coordinates, relative to the horizontal (<see cref="AlignH"/>)
/// alignment parameter <paramref name="alignH"/></param>
/// <param name="y">The Y location to display the text, in screen
/// coordinates, relative to the vertical (<see cref="AlignV"/>
/// alignment parameter <paramref name="alignV"/></param>
/// <param name="alignH">A horizontal alignment parameter specified
/// using the <see cref="AlignH"/> enum type</param>
/// <param name="alignV">A vertical alignment parameter specified
/// using the <see cref="AlignV"/> enum type</param>
/// <param name="scaleFactor">
/// The scaling factor to be used for rendering objects. This is calculated and
/// passed down by the parent <see cref="GraphPane"/> object using the
/// <see cref="PaneBase.CalcScaleFactor"/> method, and is used to proportionally adjust
/// font sizes, etc. according to the actual size of the graph.
/// </param>
/// <param name="layoutArea">The limiting area (<see cref="SizeF"/>) into which the text
/// must fit. The actual rectangle may be smaller than this, but the text will be wrapped
/// to accomodate the area.</param>
/// <returns>A polygon of 4 points defining the area of this text</returns>
public PointF[] GetBox( Graphics g, string text, float x,
float y, AlignH alignH, AlignV alignV,
float scaleFactor, SizeF layoutArea )
{
// make sure the font size is properly scaled
Remake( scaleFactor, this.Size, ref _scaledSize, ref _font );
// Get the width and height of the text
SizeF sizeF;
if ( layoutArea.IsEmpty )
sizeF = g.MeasureStringCache(text, _font);
else
sizeF = g.MeasureStringCache(text, _font, layoutArea);
// Create a bounding box rectangle for the text
RectangleF rect = new RectangleF( new PointF( -sizeF.Width / 2.0F, 0.0F ), sizeF );
Matrix matrix = new Matrix();
SetupMatrix( matrix, x, y, sizeF, alignH, alignV, _angle );
PointF[] pts = new PointF[4];
pts[0] = new PointF( rect.Left, rect.Top );
pts[1] = new PointF( rect.Right, rect.Top );
pts[2] = new PointF( rect.Right, rect.Bottom );
pts[3] = new PointF( rect.Left, rect.Bottom );
matrix.TransformPoints( pts );
return pts;
}
/// <summary>
/// Render the specified <paramref name="text"/> to the specifed
/// <see cref="Graphics"/> device. The text, border, and fill options
/// will be rendered as required. This special case method will show the
/// specified text as a power of 10, using the <see cref="Default.SuperSize"/>
/// and <see cref="Default.SuperShift"/>.
/// </summary>
/// <param name="g">
/// A graphic device object to be drawn into. This is normally e.Graphics from the
/// PaintEventArgs argument to the Paint() method.
/// </param>
/// <param name="pane">
/// A reference to the <see cref="ZedGraph.GraphPane"/> object that is the parent or
/// owner of this object.
/// </param>
/// <param name="text">A string value containing the text to be
/// displayed. This can be multiple lines, separated by newline ('\n')
/// characters</param>
/// <param name="x">The X location to display the text, in screen
/// coordinates, relative to the horizontal (<see cref="AlignH"/>)
/// alignment parameter <paramref name="alignH"/></param>
/// <param name="y">The Y location to display the text, in screen
/// coordinates, relative to the vertical (<see cref="AlignV"/>
/// alignment parameter <paramref name="alignV"/></param>
/// <param name="alignH">A horizontal alignment parameter specified
/// using the <see cref="AlignH"/> enum type</param>
/// <param name="alignV">A vertical alignment parameter specified
/// using the <see cref="AlignV"/> enum type</param>
/// <param name="scaleFactor">
/// The scaling factor to be used for rendering objects. This is calculated and
/// passed down by the parent <see cref="GraphPane"/> object using the
/// <see cref="PaneBase.CalcScaleFactor"/> method, and is used to proportionally adjust
/// font sizes, etc. according to the actual size of the graph.
/// </param>
public void DrawTenPower( Graphics g, GraphPane pane, string text, float x,
float y, AlignH alignH, AlignV alignV,
float scaleFactor )
{
SmoothingMode sModeSave = g.SmoothingMode;
TextRenderingHint sHintSave = g.TextRenderingHint;
if ( _isAntiAlias )
{
g.SmoothingMode = SmoothingMode.HighQuality;
g.TextRenderingHint = TextRenderingHint.AntiAlias;
}
// make sure the font size is properly scaled
Remake( scaleFactor, this.Size, ref _scaledSize, ref _font );
float scaledSuperSize = _scaledSize * Default.SuperSize;
Remake( scaleFactor, this.Size * Default.SuperSize, ref scaledSuperSize,
ref _superScriptFont );
// Get the width and height of the text
SizeF size10 = g.MeasureStringCache("10", _font);
SizeF sizeText = g.MeasureStringCache(text, _superScriptFont);
SizeF totSize = new SizeF( size10.Width + sizeText.Width,
size10.Height + sizeText.Height * Default.SuperShift );
float charWidth = g.MeasureStringCache("x", _superScriptFont).Width;
// Save the old transform matrix for later restoration
Matrix saveMatrix = g.Transform;
g.Transform = SetupMatrix( g.Transform, x, y, totSize, alignH, alignV, _angle );
// make a center justified StringFormat alignment
// for drawing the text
StringFormat strFormat = new StringFormat();
strFormat.Alignment = _stringAlignment;
// Create a rectangle representing the border around the
// text. Note that, while the text is drawn based on the
// TopCenter position, the rectangle is drawn based on
// the TopLeft position. Therefore, move the rectangle
// width/2 to the left to align it properly
RectangleF rectF = new RectangleF( -totSize.Width / 2.0F, 0.0F,
totSize.Width, totSize.Height );
// If the background is to be filled, fill it
_fill.Draw( g, rectF );
// Draw the border around the text if required
_border.Draw( g, pane, scaleFactor, rectF );
// make a solid brush for rendering the font itself
using ( SolidBrush brush = new SolidBrush( _fontColor ) )
{
// Draw the actual text. Note that the coordinate system
// is set up such that 0,0 is at the location where the
// CenterTop of the text needs to be.
g.DrawString( "10", _font, brush,
( -totSize.Width + size10.Width ) / 2.0F,
sizeText.Height * Default.SuperShift, strFormat );
g.DrawString( text, _superScriptFont, brush,
( totSize.Width - sizeText.Width - charWidth ) / 2.0F,
0.0F,
strFormat );
}
// Restore the transform matrix back to original
g.Transform = saveMatrix;
g.SmoothingMode = sModeSave;
g.TextRenderingHint = sHintSave;
}
/// <summary>
/// Determines if the specified screen point lies within the bounding box of
/// the text, taking into account alignment and rotation parameters.
/// </summary>
/// <param name="pt">The screen point, in pixel units</param>
/// <param name="g">
/// A graphic device object to be drawn into. This is normally e.Graphics from the
/// PaintEventArgs argument to the Paint() method.
/// </param>
/// <param name="text">A string value containing the text to be
/// displayed. This can be multiple lines, separated by newline ('\n')
/// characters</param>
/// <param name="x">The X location to display the text, in screen
/// coordinates, relative to the horizontal (<see cref="AlignH"/>)
/// alignment parameter <paramref name="alignH"/></param>
/// <param name="y">The Y location to display the text, in screen
/// coordinates, relative to the vertical (<see cref="AlignV"/>
/// alignment parameter <paramref name="alignV"/></param>
/// <param name="alignH">A horizontal alignment parameter specified
/// using the <see cref="AlignH"/> enum type</param>
/// <param name="alignV">A vertical alignment parameter specified
/// using the <see cref="AlignV"/> enum type</param>
/// <param name="scaleFactor">
/// The scaling factor to be used for rendering objects. This is calculated and
/// passed down by the parent <see cref="GraphPane"/> object using the
/// <see cref="PaneBase.CalcScaleFactor"/> method, and is used to proportionally adjust
/// font sizes, etc. according to the actual size of the graph.
/// </param>
/// <param name="layoutArea">The limiting area (<see cref="SizeF"/>) into which the text
/// must fit. The actual rectangle may be smaller than this, but the text will be wrapped
/// to accomodate the area.</param>
/// <returns>true if the point lies within the bounding box, false otherwise</returns>
public bool PointInBox( PointF pt, Graphics g, string text, float x,
float y, AlignH alignH, AlignV alignV,
float scaleFactor, SizeF layoutArea )
{
// make sure the font size is properly scaled
Remake( scaleFactor, this.Size, ref _scaledSize, ref _font );
// Get the width and height of the text
SizeF sizeF;
if ( layoutArea.IsEmpty )
sizeF = g.MeasureStringCache(text, _font);
else
sizeF = g.MeasureStringCache(text, _font, layoutArea);
// Create a bounding box rectangle for the text
RectangleF rect = new RectangleF( new PointF( -sizeF.Width / 2.0F, 0.0F ), sizeF );
// Build a transform matrix that inverts that drawing transform
// in this manner, the point is brought back to the box, rather
// than vice-versa. This allows the container check to be a simple
// RectangleF.Contains, since the rectangle won't be rotated.
Matrix matrix = GetMatrix( x, y, sizeF, alignH, alignV, _angle );
PointF[] pts = new PointF[1];
pts[0] = pt;
matrix.TransformPoints( pts );
return rect.Contains( pts[0] );
}
/// <summary>
/// Get a <see cref="SizeF"/> struct representing the width and height
/// of the bounding box for the specified text string, based on the scaled font size.
/// </summary>
/// <remarks>
/// This special case method will show the specified string as a power of 10,
/// superscripted and downsized according to the
/// <see cref="Default.SuperSize"/> and <see cref="Default.SuperShift"/>.
/// This routine differs from <see cref="MeasureString(Graphics,string,float)"/> in that it takes into
/// account the rotation angle of the font, and gives the dimensions of the
/// bounding box that encloses the text at the specified angle.
/// </remarks>
/// <param name="g">
/// A graphic device object to be drawn into. This is normally e.Graphics from the
/// PaintEventArgs argument to the Paint() method.
/// </param>
/// <param name="text">The text string for which the width is to be calculated
/// </param>
/// <param name="scaleFactor">
/// The scaling factor to be used for rendering objects. This is calculated and
/// passed down by the parent <see cref="GraphPane"/> object using the
/// <see cref="PaneBase.CalcScaleFactor"/> method, and is used to proportionally adjust
/// font sizes, etc. according to the actual size of the graph.
/// </param>
/// <returns>The scaled text dimensions, in pixels, in the form of
/// a <see cref="SizeF"/> struct</returns>
public SizeF BoundingBoxTenPower( Graphics g, string text, float scaleFactor )
{
//Remake( scaleFactor, this.Size, ref this.scaledSize, ref this.font );
float scaledSuperSize = _scaledSize * Default.SuperSize;
Remake( scaleFactor, this.Size * Default.SuperSize, ref scaledSuperSize,
ref _superScriptFont );
// Get the width and height of the text
SizeF size10 = MeasureString( g, "10", scaleFactor );
SizeF sizeText = g.MeasureStringCache(text, _superScriptFont);
if ( _isDropShadow )
{
sizeText.Width += (float)( Math.Cos( _dropShadowAngle ) *
_dropShadowOffset * _superScriptFont.Height );
sizeText.Height += (float)( Math.Sin( _dropShadowAngle ) *
_dropShadowOffset * _superScriptFont.Height );
}
SizeF totSize = new SizeF( size10.Width + sizeText.Width,
size10.Height + sizeText.Height * Default.SuperShift );
float cs = (float)Math.Abs( Math.Cos( _angle * Math.PI / 180.0 ) );
float sn = (float)Math.Abs( Math.Sin( _angle * Math.PI / 180.0 ) );
SizeF s2 = new SizeF( totSize.Width * cs + totSize.Height * sn,
totSize.Width * sn + totSize.Height * cs );
return s2;
}
/// <summary>
/// Get a <see cref="SizeF"/> struct representing the width and height
/// of the specified text string, based on the scaled font size, and using
/// the specified <see cref="SizeF"/> as an outer limit.
/// </summary>
/// <remarks>
/// This method will allow the text to wrap as necessary to fit the
/// <see paramref="layoutArea"/>.
/// </remarks>
/// <param name="g">
/// A graphic device object to be drawn into. This is normally e.Graphics from the
/// PaintEventArgs argument to the Paint() method.
/// </param>
/// <param name="text">The text string for which the width is to be calculated
/// </param>
/// <param name="scaleFactor">
/// The scaling factor to be used for rendering objects. This is calculated and
/// passed down by the parent <see cref="GraphPane"/> object using the
/// <see cref="PaneBase.CalcScaleFactor"/> method, and is used to proportionally adjust
/// font sizes, etc. according to the actual size of the graph.
/// </param>
/// <param name="layoutArea">The limiting area (<see cref="SizeF"/>) into which the text
/// must fit. The actual rectangle may be smaller than this, but the text will be wrapped
/// to accomodate the area.</param>
/// <returns>The scaled text dimensions, in pixels, in the form of
/// a <see cref="SizeF"/> struct</returns>
public SizeF MeasureString( Graphics g, string text, float scaleFactor, SizeF layoutArea )
{
Remake( scaleFactor, this.Size, ref _scaledSize, ref _font );
SizeF size = g.MeasureStringCache( text, _font, layoutArea );
if ( _isDropShadow )
{
size.Width += (float)( Math.Cos( _dropShadowAngle ) *
_dropShadowOffset * _font.Height );
size.Height += (float)( Math.Sin( _dropShadowAngle ) *
_dropShadowOffset * _font.Height );
}
return size;
}
/// <summary>
/// Get the total width of the specified text string
/// </summary>
/// <param name="g">
/// A graphic device object to be drawn into. This is normally e.Graphics from the
/// PaintEventArgs argument to the Paint() method.
/// </param>
/// <param name="text">The text string for which the width is to be calculated
/// </param>
/// <param name="scaleFactor">
/// The scaling factor to be used for rendering objects. This is calculated and
/// passed down by the parent <see cref="GraphPane"/> object using the
/// <see cref="PaneBase.CalcScaleFactor"/> method, and is used to proportionally adjust
/// font sizes, etc. according to the actual size of the graph.
/// </param>
/// <returns>The scaled text width, in pixels</returns>
public float GetWidth( Graphics g, string text, float scaleFactor )
{
Remake( scaleFactor, this.Size, ref _scaledSize, ref _font );
float width = g.MeasureStringCache(text, _font).Width;
if ( _isDropShadow )
width += (float)( Math.Cos( _dropShadowAngle ) * _dropShadowOffset * _font.Height );
return width;
}
/// <summary>
/// Get the average character width of the scaled font. The average width is
/// based on the character 'x'
/// </summary>
/// <param name="g">
/// A graphic device object to be drawn into. This is normally e.Graphics from the
/// PaintEventArgs argument to the Paint() method.
/// </param>
/// <param name="scaleFactor">
/// The scaling factor to be used for rendering objects. This is calculated and
/// passed down by the parent <see cref="GraphPane"/> object using the
/// <see cref="PaneBase.CalcScaleFactor"/> method, and is used to proportionally adjust
/// font sizes, etc. according to the actual size of the graph.
/// </param>
/// <returns>The scaled font width, in pixels</returns>
public float GetWidth( Graphics g, float scaleFactor )
{
Remake( scaleFactor, this.Size, ref _scaledSize, ref _font );
return g.MeasureStringCache("x", _font).Width;
}
