ayrware code snippets

Draw Text Directly to the Screen

The example below details how to draw text directly to a window using the GDI+ Graphics DrawString method. The various parameters required to describe the appearance of the text on-screen are generated first.

					
						// Create the font family

						CComBSTR bstrFontName(m_strFont.c_str());

						FontFamily fontFamily(bstrFontName);

						// Create the font

						RECT rctDrawArea = {0, 0, m_lPageWidth, m_lPageHeight};

						REAL rFontSize = this->CalculateFontSize(rctDrawArea, m_lSize);

						FontStyle fsStyle = this->GetFontStyle(m_strStyle);

						Font font(&fontFamily, rFontSize, fsStyle, UnitPoint);

						// Select the drawing colour

						Color color(m_ucAlpha, m_ucRed, m_ucGreen, m_ucBlue);

						SolidBrush solidBrush(color);

						// Set the text alignment

						StringFormat format;

						StringAlignment Alignment = this->GetStringAlignment(m_strAlign);

						format.SetAlignment(Alignment);

						// Set the position of the text

						this->CalculateTextPosition(rctDrawArea, m_lXPos, m_lYPos);

						PointF orgPosition(m_lXPos, m_lYPos);

						// Determine whether any scaling is required

						if(m_pScaleMatrix == NULL) m_pScaleMatrix = new Matrix();

						this->ScaleText(hWnd, &m_pScaleMatrix);

						pCanvas->SetTransform(m_pScaleMatrix);

						// Set the text rendering mode

						pCanvas->SetTextRenderingHint(TextRenderingHintAntiAliasGridFit);

						// Retain the text bounding rectangle coordinates for later

						CComBSTR bstrText(m_strText.c_str());

						pCanvas->MeasureString(bstrText, (INT)m_strText.length(), &font, orgPosition, &format, &m_rctTextBounds);

						// Draw the text

						pCanvas->DrawString(bstrText, (INT)m_strText.length(), &font, orgPosition, &format, &solidBrush);

						// Reset the world transformation matrix

						pCanvas->ResetTransform();

						// Clean up resources

						bstrText.Empty();

						bstrFontName.Empty();

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