Outline the Font Metrics
Imports System.Drawing.Drawing2D
Imports System
Imports System.Drawing.Text
Imports System.Drawing
Imports System.Windows.Forms
Imports System.Math
Public Class MainClass
Shared Sub Main()
Dim form1 As Form = New Form1()
Application.Run(form1)
End Sub
End Class
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Me.ResizeRedraw = True
End Sub
Private Sub Form1_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles MyBase.Paint
Dim txt As String = "www.Java2s.com"
Dim layout_rect As New RectangleF(0, 0, _
Me.ClientSize.Width, Me.ClientSize.Height)
Dim string_format As New StringFormat
string_format.LineAlignment = StringAlignment.Center
string_format.Alignment = StringAlignment.Center
Dim the_font As Font
e.Graphics.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAliasGridFit
the_font = New Font("Times New Roman", 80, FontStyle.Bold, GraphicsUnit.Pixel)
Dim character_ranges(txt.Length - 1) As CharacterRange
For i As Integer = 0 To txt.Length - 1
character_ranges(i) = New CharacterRange(i, 1)
Next i
string_format.SetMeasurableCharacterRanges(character_ranges)
Dim character_regions() As Region = _
e.Graphics.MeasureCharacterRanges(txt, _
the_font, layout_rect, string_format)
Dim em_height As Integer = the_font.FontFamily.GetEmHeight(FontStyle.Bold)
Dim em_height_pix As Single = the_font.Size
Dim design_to_pixels As Single = the_font.Size / em_height
Dim ascent As Integer = the_font.FontFamily.GetCellAscent(FontStyle.Bold)
Dim ascent_pix As Single = ascent * design_to_pixels
Dim descent As Integer = the_font.FontFamily.GetCellDescent(FontStyle.Bold)
Dim descent_pix As Single = descent * design_to_pixels
Dim cell_height_pix As Single = ascent_pix + descent_pix
Dim internal_leading_pix As Single = cell_height_pix - em_height_pix
Dim line_spacing As Integer = the_font.FontFamily.GetLineSpacing(FontStyle.Bold)
Dim line_spacing_pix As Single = line_spacing * design_to_pixels
Dim external_leading_pix As Single = line_spacing_pix - cell_height_pix
For Each rgn As Region In character_regions
Dim character_bounds As RectangleF = rgn.GetBounds(e.Graphics)
Dim character_rect As Rectangle = _
Rectangle.Round(character_bounds)
e.Graphics.DrawRectangle(Pens.Black, character_rect)
e.Graphics.DrawLine(Pens.White, _
character_rect.X, _
character_rect.Y + internal_leading_pix, _
character_rect.Right, _
character_rect.Y + internal_leading_pix)
e.Graphics.DrawLine(Pens.Yellow, _
character_rect.X, _
character_rect.Y + ascent_pix, _
character_rect.Right, _
character_rect.Y + ascent_pix)
e.Graphics.DrawLine(Pens.Orange, _
character_rect.X, _
character_rect.Y + ascent_pix + descent_pix, _
character_rect.Right, _
character_rect.Y + ascent_pix + descent_pix)
e.Graphics.FillRectangle(Brushes.Red, _
character_rect.X, _
character_rect.Y + ascent_pix + descent_pix, _
character_rect.Width, _
external_leading_pix)
Console.WriteLine( _
character_rect.X & ", " & _
character_rect.Y + ascent_pix + descent_pix & ", " & _
character_rect.Width & ", " & _
external_leading_pix)
Next rgn
e.Graphics.DrawString(txt, the_font, Brushes.Black, _
layout_rect, string_format)
End Sub
End Class
<Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()> _
Partial Public Class Form1
Inherits System.Windows.Forms.Form
'Form overrides dispose to clean up the component list.
<System.Diagnostics.DebuggerNonUserCode()> _
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
If disposing AndAlso components IsNot Nothing Then
components.Dispose()
End If
MyBase.Dispose(disposing)
End Sub
'Required by the Windows Form Designer
Private components As System.ComponentModel.IContainer
'NOTE: The following procedure is required by the Windows Form Designer
'It can be modified using the Windows Form Designer.
'Do not modify it using the code editor.
<System.Diagnostics.DebuggerStepThrough()> _
Private Sub InitializeComponent()
Me.SuspendLayout()
'
'Form1
'
Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
Me.ClientSize = New System.Drawing.Size(200, 200)
Me.Name = "Form1"
Me.Text = ""
Me.ResumeLayout(False)
End Sub
End Class
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