Exemplo n.º 1
0
// --------------------------------------------------------------
void
GFontWin32GDIPlus::GetExtent( const char * str, int inCharCount, float * outWidth, 
					   float * outHeight, VGDevice * context ) const 
{
	if (!inCharCount) {
		*outWidth = *outHeight = 0;
		return;
	}
	// convert input string
	DWORD count = (DWORD)mbstowcs(NULL, str, inCharCount);
	WCHAR * wstr = (WCHAR*) malloc ((count + 1) * sizeof(WCHAR));
	mbstowcs(wstr, str, inCharCount);

	//std::string s(str);
	//std::wstring wstr(s.length(),L' ');
	//std::copy(s.begin(), s.end(), wstr.begin());

	Graphics* gdiContext = (Graphics*) GetContext( context );

/*	-- known Gdi+ issue: 
	We must use the following way to determine correct font extent 
	because typical Graphics::MeasureString() method doesn't work
	properly (return values are incorrect due to antialiasing)
*/
	Font* dgiFont = GetNativeFont();

	// Layout rectangles used for drawing strings
	RectF   layoutRect_A(0.0f, 0.0f, 1300.0f, 1300.0f);
	// 1 range of character positions within the string
	CharacterRange charRange(0, inCharCount);
	// String format used to apply to string when drawing
	StringFormat strFormat;
	// Set three ranges of character positions.
	strFormat.SetMeasurableCharacterRanges(1, &charRange);
	Region *pCharRangeRegions = new Region();

	// Get the regions that correspond to the ranges within the string when
	// layout rectangle A is used. 
	gdiContext->MeasureCharacterRanges( wstr, inCharCount, dgiFont, layoutRect_A, &strFormat, 1, pCharRangeRegions);

	RectF boundRect;
	pCharRangeRegions->GetBounds( &boundRect, gdiContext);

	*outWidth = boundRect.Width;
	*outHeight = boundRect.Height;
	free (wstr);
}
Exemplo n.º 2
0
// --------------------------------------------------------------
void	
GFontWin32GDIPlus::GetExtent( unsigned char c, float * outWidth, 
					          float * outHeight, VGDevice * context ) const
{
	WCHAR wstr [] = L"0";
	mbstowcs(wstr, (const char*)&c, 1);

	Graphics* gdiContext = (Graphics*) GetContext( context );

/*	-- known Gdi+ issue: 
	We must use the following way to determine correct font extent 
	because typical Graphics::MeasureString() method doesn't work
	properly (return values are incorrect due to antialiasing)
*/
	Font* dgiFont = GetNativeFont();

	// Layout rectangles used for drawing strings
	RectF   layoutRect_A(0.0f, 0.0f, 1300.0f, 1300.0f);
	// 1 range of character positions within the string
	CharacterRange charRange(0, 1);
	// String format used to apply to string when drawing
	StringFormat strFormat;
	// Set three ranges of character positions.
	strFormat.SetMeasurableCharacterRanges(1, &charRange);
	Region *pCharRangeRegions = new Region();

	// Get the regions that correspond to the ranges within the string when
	// layout rectangle A is used. 
	gdiContext->MeasureCharacterRanges( wstr, 1, dgiFont, layoutRect_A, &strFormat, 1, pCharRangeRegions);

	RectF boundRect;
	pCharRangeRegions->GetBounds( &boundRect, gdiContext);

	*outHeight = boundRect.Height;
	*outWidth = boundRect.Width;
	// in some cases (when some symbols must be forced into char map), extent needs to be fixed  
	if (c == 139) *outWidth = 6.0;

}
Exemplo n.º 3
0
/*
** Draws the string or calculates it's size
**
*/
bool CMeterString::DrawString(Graphics& graphics, RectF* rect)
{
	if (m_Font == NULL) return false;

	LPCWSTR string = m_String.c_str();
	int stringLen = (int)m_String.length();

	StringFormat stringFormat;

	if (m_AntiAlias)
	{
		graphics.SetTextRenderingHint(TextRenderingHintAntiAlias);
	}
	else
	{
		graphics.SetTextRenderingHint(TextRenderingHintSingleBitPerPixelGridFit);
	}

	switch (m_Align)
	{
	case ALIGN_CENTERCENTER:
		stringFormat.SetAlignment(StringAlignmentCenter);
		stringFormat.SetLineAlignment(StringAlignmentCenter);
		break;

	case ALIGN_RIGHTCENTER:
		stringFormat.SetAlignment(StringAlignmentFar);
		stringFormat.SetLineAlignment(StringAlignmentCenter);
		break;

	case ALIGN_LEFTCENTER:
		stringFormat.SetAlignment(StringAlignmentNear);
		stringFormat.SetLineAlignment(StringAlignmentCenter);
		break;

	case ALIGN_CENTERBOTTOM:
		stringFormat.SetAlignment(StringAlignmentCenter);
		stringFormat.SetLineAlignment(StringAlignmentFar);
		break;

	case ALIGN_RIGHTBOTTOM:
		stringFormat.SetAlignment(StringAlignmentFar);
		stringFormat.SetLineAlignment(StringAlignmentFar);
		break;

	case ALIGN_LEFTBOTTOM:
		stringFormat.SetAlignment(StringAlignmentNear);
		stringFormat.SetLineAlignment(StringAlignmentFar);
		break;

	case ALIGN_CENTER:	// Same as CenterTop
		stringFormat.SetAlignment(StringAlignmentCenter);
		stringFormat.SetLineAlignment(StringAlignmentNear);
		break;

	case ALIGN_RIGHT:	// Same as RightTop
		stringFormat.SetAlignment(StringAlignmentFar);
		stringFormat.SetLineAlignment(StringAlignmentNear);
		break;

	case ALIGN_LEFT:	// Same as LeftTop
		stringFormat.SetAlignment(StringAlignmentNear);
		stringFormat.SetLineAlignment(StringAlignmentNear);
		break;
	}

	if (m_ClipString)
	{
		stringFormat.SetTrimming(StringTrimmingEllipsisCharacter);
	}
	else
	{
		stringFormat.SetTrimming(StringTrimmingNone);
		stringFormat.SetFormatFlags(StringFormatFlagsNoClip | StringFormatFlagsNoWrap);
	}

	CharacterRange range(0, stringLen);
	stringFormat.SetMeasurableCharacterRanges(1, &range);

	REAL x = (REAL)GetX();
	REAL y = (REAL)GetY();

	if (rect)
	{
		PointF pos(x, y);
		graphics.MeasureString(string, stringLen, m_Font, pos, &stringFormat, rect);
	}
	else
	{
		RectF rcDest(x, y, (REAL)m_W, (REAL)m_H);
		m_Rect = rcDest;

		if (m_Angle != 0.0f)
		{
			graphics.TranslateTransform((Gdiplus::REAL)CMeter::GetX(), y);
			graphics.RotateTransform(CONVERT_TO_DEGREES(m_Angle));
			graphics.TranslateTransform(-(Gdiplus::REAL)CMeter::GetX(), -y);
		}

		if (m_Effect != EFFECT_NONE)
		{
			SolidBrush solidBrush(m_EffectColor);
			RectF rcEffect(rcDest);

			if (m_Effect == EFFECT_SHADOW)
			{
				rcEffect.Offset(1, 1);
				graphics.DrawString(string, stringLen, m_Font, rcEffect, &stringFormat, &solidBrush);
			}
			else  //if (m_Effect == EFFECT_BORDER)
			{
				rcEffect.Offset(0, 1);
				graphics.DrawString(string, stringLen, m_Font, rcEffect, &stringFormat, &solidBrush);
				rcEffect.Offset(1, -1);
				graphics.DrawString(string, stringLen, m_Font, rcEffect, &stringFormat, &solidBrush);
				rcEffect.Offset(-1, -1);
				graphics.DrawString(string, stringLen, m_Font, rcEffect, &stringFormat, &solidBrush);
				rcEffect.Offset(-1, 1);
				graphics.DrawString(string, stringLen, m_Font, rcEffect, &stringFormat, &solidBrush);
			}
		}

		SolidBrush solidBrush(m_Color);
		graphics.DrawString(string, stringLen, m_Font, rcDest, &stringFormat, &solidBrush);

		if (m_Angle != 0.0f)
		{
			graphics.ResetTransform();
		}
	}

	return true;
}