StringFormat.SetMeasurableCharacterRanges(CharacterRange[]) Metoda
Definice
Důležité
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Určuje pole CharacterRange struktur, které představují rozsahy znaků měřené voláním MeasureCharacterRanges(String, Font, RectangleF, StringFormat) metody .
public:
void SetMeasurableCharacterRanges(cli::array <System::Drawing::CharacterRange> ^ ranges);
public void SetMeasurableCharacterRanges (System.Drawing.CharacterRange[] ranges);
member this.SetMeasurableCharacterRanges : System.Drawing.CharacterRange[] -> unit
Public Sub SetMeasurableCharacterRanges (ranges As CharacterRange())
Parametry
- ranges
- CharacterRange[]
Pole CharacterRange struktur, které určuje rozsahy znaků měřené voláním MeasureCharacterRanges(String, Font, RectangleF, StringFormat) metody .
Výjimky
Je nastaveno více než 32 rozsahů znaků.
Příklady
Následující příklad je navržený pro použití s model Windows Forms a vyžaduje PaintEventArgse
, což je parametr obslužné rutiny Paint události. Kód provede následující akce:
Nastaví rozsahy znaků pro StringFormat.
Měří rozsahy znaků pro daný řetězec a obdélník rozložení.
Nakreslí řetězec a obdélník rozložení.
Vykresluje oblasti. Každý Region určuje oblast, která je obsazena rozsahem znaků. Hodnoty v oblastech se nastavují při měření rozsahů znaků metodou MeasureCharacterRanges .
Zopakuje první čtyři kroky, ale zahrnuje koncové mezery v měření každého rozsahu znaků.
Vymaže příznaky formátu tak, aby koncové mezery StringFormat nebyly zahrnuty do měření jednotlivých rozsahů znaků.
Zopakuje první čtyři kroky, ale používá jiný obdélník rozložení, aby ukázal, že obdélník rozložení ovlivňuje rozměry rozsahů znaků. Velikost písma bude mít vliv také na měření.
void SetMeasCharRangesExample( PaintEventArgs^ e )
{
Graphics^ g = e->Graphics;
SolidBrush^ redBrush = gcnew SolidBrush( Color::FromArgb( 50, 255, 0, 0 ) );
// Layout rectangles, font, and string format used for displaying string.
Rectangle layoutRectA = Rectangle(20,20,165,80);
Rectangle layoutRectB = Rectangle(20,110,165,80);
Rectangle layoutRectC = Rectangle(20,200,240,80);
System::Drawing::Font^ tnrFont = gcnew System::Drawing::Font( "Times New Roman",16 );
StringFormat^ strFormat = gcnew StringFormat;
// Ranges of character positions within a string.
array<CharacterRange>^ charRanges = {CharacterRange(3,5),CharacterRange(15,2),CharacterRange(30,15)};
// Each region specifies the area occupied by the characters within a
// range of positions. the values are obtained by using a method that
// measures the character ranges.
array<System::Drawing::Region^>^charRegions = gcnew array<System::Drawing::Region^>(charRanges->Length);
// String to be displayed.
String^ str = "The quick, brown fox easily jumps over the lazy dog.";
// Set the char ranges for the string format.
strFormat->SetMeasurableCharacterRanges( charRanges );
// loop counter (unsigned 8-bit integer)
Byte i;
// Measure the char ranges for a given string and layout rectangle. Each
// area occupied by the characters in a range is stored as a region. Then
// draw the string and layout rectangle, and paint the regions.
charRegions = g->MeasureCharacterRanges( str, tnrFont, layoutRectA, strFormat );
g->DrawString( str, tnrFont, Brushes::Blue, layoutRectA, strFormat );
g->DrawRectangle( Pens::Black, layoutRectA );
// Paint the regions.
for ( i = 0; i < charRegions->Length; i++ )
g->FillRegion( redBrush, charRegions[ i ] );
// Repeat the above steps, but include trailing spaces in the char
// range measurement by setting the appropriate string format flag.
strFormat->FormatFlags = StringFormatFlags::MeasureTrailingSpaces;
charRegions = g->MeasureCharacterRanges( str, tnrFont, layoutRectB, strFormat );
g->DrawString( str, tnrFont, Brushes::Blue, layoutRectB, strFormat );
g->DrawRectangle( Pens::Black, layoutRectB );
for ( i = 0; i < charRegions->Length; i++ )
g->FillRegion( redBrush, charRegions[ i ] );
// Clear all the format flags.
strFormat->FormatFlags = StringFormatFlags(0);
// Repeat the steps, but use a different layout rectangle. the dimensions
// of the layout rectangle and the size of the font both affect the
// character range measurement.
charRegions = g->MeasureCharacterRanges( str, tnrFont, layoutRectC, strFormat );
g->DrawString( str, tnrFont, Brushes::Blue, layoutRectC, strFormat );
g->DrawRectangle( Pens::Black, layoutRectC );
// Paint the regions.
for ( i = 0; i < charRegions->Length; i++ )
g->FillRegion( redBrush, charRegions[ i ] );
}
public void SetMeasCharRangesExample(PaintEventArgs e)
{
Graphics g = e.Graphics;
SolidBrush redBrush = new SolidBrush(Color.FromArgb(50, 255, 0, 0));
// Layout rectangles, font, and string format used for displaying string.
Rectangle layoutRectA = new Rectangle(20, 20, 165, 80);
Rectangle layoutRectB = new Rectangle(20, 110, 165, 80);
Rectangle layoutRectC = new Rectangle(20, 200, 240, 80);
Font tnrFont = new Font("Times New Roman", 16);
StringFormat strFormat = new StringFormat();
// Ranges of character positions within a string.
CharacterRange[] charRanges = { new CharacterRange(3, 5),
new CharacterRange(15, 2), new CharacterRange(30, 15)};
// Each region specifies the area occupied by the characters within a
// range of positions. the values are obtained by using a method that
// measures the character ranges.
Region[] charRegions = new Region[charRanges.Length];
// String to be displayed.
string str =
"The quick, brown fox easily jumps over the lazy dog.";
// Set the char ranges for the string format.
strFormat.SetMeasurableCharacterRanges(charRanges);
// loop counter (unsigned 8-bit integer)
byte i;
// Measure the char ranges for a given string and layout rectangle. Each
// area occupied by the characters in a range is stored as a region. Then
// draw the string and layout rectangle, and paint the regions.
charRegions = g.MeasureCharacterRanges(str, tnrFont,
layoutRectA, strFormat);
g.DrawString(str, tnrFont, Brushes.Blue, layoutRectA, strFormat);
g.DrawRectangle(Pens.Black, layoutRectA);
// Paint the regions.
for (i = 0; i < charRegions.Length; i++)
g.FillRegion(redBrush, charRegions[i]);
// Repeat the above steps, but include trailing spaces in the char
// range measurement by setting the appropriate string format flag.
strFormat.FormatFlags = StringFormatFlags.MeasureTrailingSpaces;
charRegions = g.MeasureCharacterRanges(str, tnrFont,
layoutRectB, strFormat);
g.DrawString(str, tnrFont, Brushes.Blue, layoutRectB, strFormat);
g.DrawRectangle(Pens.Black, layoutRectB);
for (i = 0; i < charRegions.Length; i++)
g.FillRegion(redBrush, charRegions[i]);
// Clear all the format flags.
strFormat.FormatFlags = 0;
// Repeat the steps, but use a different layout rectangle. the dimensions
// of the layout rectangle and the size of the font both affect the
// character range measurement.
charRegions = g.MeasureCharacterRanges(str, tnrFont,
layoutRectC, strFormat);
g.DrawString(str, tnrFont, Brushes.Blue, layoutRectC, strFormat);
g.DrawRectangle(Pens.Black, layoutRectC);
// Paint the regions.
for (i = 0; i < charRegions.Length; i++)
g.FillRegion(redBrush, charRegions[i]);
}
Public Sub SetMeasCharRangesExample(ByVal e As PaintEventArgs)
Dim g As Graphics = e.Graphics
Dim redBrush As New SolidBrush(Color.FromArgb(50, 255, 0, 0))
' Layout rectangles, font, and string format used for
' displaying string.
Dim layoutRectA As New Rectangle(20, 20, 165, 80)
Dim layoutRectB As New Rectangle(20, 110, 165, 80)
Dim layoutRectC As New Rectangle(20, 200, 240, 80)
Dim tnrFont As New Font("Times New Roman", 16)
Dim strFormat As New StringFormat
' Ranges of character positions within a string.
Dim charRanges As CharacterRange() = {New CharacterRange(3, 5), _
New CharacterRange(15, 2), New CharacterRange(30, 15)}
' Each region specifies the area occupied by the characters within
' a range of positions. The values are obtained by using a method
' that measures the character ranges.
Dim charRegions(charRanges.Length) As [Region]
' String to be displayed.
Dim str As String = _
"The quick, brown fox easily jumps over the lazy dog."
' Set the char ranges for the string format.
strFormat.SetMeasurableCharacterRanges(charRanges)
' Loop counter (unsigned 8-bit integer).
Dim i As Byte
' Measure the char ranges for a given string and layout rectangle.
' Each area occupied by the characters in a range is stored as a
' region. then draw the string and layout rectangle and paint the
' regions.
charRegions = g.MeasureCharacterRanges(str, tnrFont, _
RectangleF.op_Implicit(layoutRectA), strFormat)
g.DrawString(str, tnrFont, Brushes.Blue, _
RectangleF.op_Implicit(layoutRectA), strFormat)
g.DrawRectangle(Pens.Black, layoutRectA)
' Paint the regions.
For i = 0 To charRegions.Length - 1
g.FillRegion(redBrush, charRegions(i))
Next i
' Repeat the above steps, but include trailing spaces in the char
' range measurement by setting the appropriate string format flag.
strFormat.FormatFlags = StringFormatFlags.MeasureTrailingSpaces
charRegions = g.MeasureCharacterRanges(str, tnrFont, _
RectangleF.op_Implicit(layoutRectB), strFormat)
g.DrawString(str, tnrFont, Brushes.Blue, _
RectangleF.op_Implicit(layoutRectB), strFormat)
g.DrawRectangle(Pens.Black, layoutRectB)
' Paint the regions.
For i = 0 To charRegions.Length - 1
g.FillRegion(redBrush, charRegions(i))
Next i
' Clear all the format flags.
strFormat.FormatFlags = 0
' Repeat the steps, but use a different layout rectangle. The
' dimensions of the layout rectangle and the size of the font both
' affect the character range measurement.
charRegions = g.MeasureCharacterRanges(str, tnrFont, _
RectangleF.op_Implicit(layoutRectC), strFormat)
g.DrawString(str, tnrFont, Brushes.Blue, _
RectangleF.op_Implicit(layoutRectC), strFormat)
g.DrawRectangle(Pens.Black, layoutRectC)
' Paint the regions.
For i = 0 To charRegions.Length - 1
g.FillRegion(redBrush, charRegions(i))
Next i
End Sub
Poznámky
Nastavení více než 32 znakových rozsahů není povoleno a způsobí .System.OverflowException
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