Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / WinForms / Managed / System / WinForms / GDI / TextRenderer.cs / 1 / TextRenderer.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Windows.Forms { using System.Internal; using System; using System.Drawing; using System.Windows.Forms.Internal; using System.Diagnostics; ////// /// public sealed class TextRenderer { //cannot instantiate private TextRenderer() { } ////// This class provides API for drawing GDI text. /// ///public static void DrawText(IDeviceContext dc, string text, Font font, Point pt, Color foreColor) { if (dc == null) { throw new ArgumentNullException("dc"); } WindowsFontQuality fontQuality = WindowsFont.WindowsFontQualityFromTextRenderingHint(dc as Graphics); IntPtr hdc = dc.GetHdc(); try { using( WindowsGraphics wg = WindowsGraphics.FromHdc( hdc )) { using (WindowsFont wf = WindowsGraphicsCacheManager.GetWindowsFont(font, fontQuality)) { wg.DrawText(text, wf, pt, foreColor); } } } finally { dc.ReleaseHdc(); } } /// public static void DrawText(IDeviceContext dc, string text, Font font, Point pt, Color foreColor, Color backColor) { if (dc == null) { throw new ArgumentNullException("dc"); } WindowsFontQuality fontQuality = WindowsFont.WindowsFontQualityFromTextRenderingHint(dc as Graphics); IntPtr hdc = dc.GetHdc(); try { using( WindowsGraphics wg = WindowsGraphics.FromHdc( hdc )) { using (WindowsFont wf = WindowsGraphicsCacheManager.GetWindowsFont(font, fontQuality)) { wg.DrawText(text, wf, pt, foreColor, backColor); } } } finally { dc.ReleaseHdc(); } } /// public static void DrawText(IDeviceContext dc, string text, Font font, Point pt, Color foreColor, TextFormatFlags flags) { if (dc == null) { throw new ArgumentNullException("dc"); } WindowsFontQuality fontQuality = WindowsFont.WindowsFontQualityFromTextRenderingHint(dc as Graphics); using( WindowsGraphicsWrapper wgr = new WindowsGraphicsWrapper( dc, flags )) { using (WindowsFont wf = WindowsGraphicsCacheManager.GetWindowsFont(font, fontQuality)) { wgr.WindowsGraphics.DrawText(text, wf, pt, foreColor, GetIntTextFormatFlags(flags)); } } } /// public static void DrawText(IDeviceContext dc, string text, Font font, Point pt, Color foreColor, Color backColor, TextFormatFlags flags) { if (dc == null) { throw new ArgumentNullException("dc"); } WindowsFontQuality fontQuality = WindowsFont.WindowsFontQualityFromTextRenderingHint(dc as Graphics); using( WindowsGraphicsWrapper wgr = new WindowsGraphicsWrapper( dc, flags )) { using (WindowsFont wf = WindowsGraphicsCacheManager.GetWindowsFont(font, fontQuality)) { wgr.WindowsGraphics.DrawText(text, wf, pt, foreColor, backColor, GetIntTextFormatFlags(flags)); } } } /// public static void DrawText(IDeviceContext dc, string text, Font font, Rectangle bounds, Color foreColor) { if (dc == null) { throw new ArgumentNullException("dc"); } WindowsFontQuality fontQuality = WindowsFont.WindowsFontQualityFromTextRenderingHint(dc as Graphics); IntPtr hdc = dc.GetHdc(); try { using( WindowsGraphics wg = WindowsGraphics.FromHdc( hdc )) { using (WindowsFont wf = WindowsGraphicsCacheManager.GetWindowsFont(font, fontQuality)) { wg.DrawText(text, wf, bounds, foreColor); } } } finally { dc.ReleaseHdc(); } } /// public static void DrawText(IDeviceContext dc, string text, Font font, Rectangle bounds, Color foreColor, Color backColor) { if (dc == null) { throw new ArgumentNullException("dc"); } WindowsFontQuality fontQuality = WindowsFont.WindowsFontQualityFromTextRenderingHint(dc as Graphics); IntPtr hdc = dc.GetHdc(); try { using( WindowsGraphics wg = WindowsGraphics.FromHdc( hdc )) { using (WindowsFont wf = WindowsGraphicsCacheManager.GetWindowsFont(font, fontQuality)) { wg.DrawText(text, wf, bounds, foreColor, backColor); } } } finally { dc.ReleaseHdc(); } } /// public static void DrawText(IDeviceContext dc, string text, Font font, Rectangle bounds, Color foreColor, TextFormatFlags flags) { if (dc == null) { throw new ArgumentNullException("dc"); } WindowsFontQuality fontQuality = WindowsFont.WindowsFontQualityFromTextRenderingHint(dc as Graphics); using( WindowsGraphicsWrapper wgr = new WindowsGraphicsWrapper( dc, flags )) { using (WindowsFont wf = WindowsGraphicsCacheManager.GetWindowsFont( font, fontQuality )) { wgr.WindowsGraphics.DrawText( text, wf, bounds, foreColor, GetIntTextFormatFlags( flags ) ); } } } /// public static void DrawText(IDeviceContext dc, string text, Font font, Rectangle bounds, Color foreColor, Color backColor, TextFormatFlags flags) { if (dc == null) { throw new ArgumentNullException("dc"); } WindowsFontQuality fontQuality = WindowsFont.WindowsFontQualityFromTextRenderingHint(dc as Graphics); using( WindowsGraphicsWrapper wgr = new WindowsGraphicsWrapper( dc, flags )) { using (WindowsFont wf = WindowsGraphicsCacheManager.GetWindowsFont( font, fontQuality )) { wgr.WindowsGraphics.DrawText(text, wf, bounds, foreColor, backColor, GetIntTextFormatFlags(flags)); } } } private static IntTextFormatFlags GetIntTextFormatFlags(TextFormatFlags flags) { if( ((uint)flags & WindowsGraphics.GdiUnsupportedFlagMask) == 0 ) { return (IntTextFormatFlags) flags; } // Clear TextRenderer custom flags. IntTextFormatFlags windowsGraphicsSupportedFlags = (IntTextFormatFlags) ( ((uint)flags) & ~WindowsGraphics.GdiUnsupportedFlagMask ); return windowsGraphicsSupportedFlags; } /// MeasureText wrappers. public static Size MeasureText(string text, Font font ) { if (string.IsNullOrEmpty(text)) { return Size.Empty; } using (WindowsFont wf = WindowsGraphicsCacheManager.GetWindowsFont(font)) { return WindowsGraphicsCacheManager.MeasurementGraphics.MeasureText(text, wf); } } public static Size MeasureText(string text, Font font, Size proposedSize ) { if (string.IsNullOrEmpty(text)) { return Size.Empty; } using (WindowsFont wf = WindowsGraphicsCacheManager.GetWindowsFont(font)) { return WindowsGraphicsCacheManager.MeasurementGraphics.MeasureText(text, WindowsGraphicsCacheManager.GetWindowsFont(font), proposedSize); } } public static Size MeasureText(string text, Font font, Size proposedSize, TextFormatFlags flags ) { if (string.IsNullOrEmpty(text)) { return Size.Empty; } using (WindowsFont wf = WindowsGraphicsCacheManager.GetWindowsFont(font)) { return WindowsGraphicsCacheManager.MeasurementGraphics.MeasureText(text, wf, proposedSize, GetIntTextFormatFlags(flags)); } } public static Size MeasureText(IDeviceContext dc, string text, Font font) { if (dc == null) { throw new ArgumentNullException("dc"); } if (string.IsNullOrEmpty(text)) { return Size.Empty; } WindowsFontQuality fontQuality = WindowsFont.WindowsFontQualityFromTextRenderingHint(dc as Graphics); IntPtr hdc = dc.GetHdc(); try { using( WindowsGraphics wg = WindowsGraphics.FromHdc( hdc )) { using (WindowsFont wf = WindowsGraphicsCacheManager.GetWindowsFont(font, fontQuality)) { return wg.MeasureText(text, wf); } } } finally { dc.ReleaseHdc(); } } public static Size MeasureText(IDeviceContext dc, string text, Font font, Size proposedSize ) { if (dc == null) { throw new ArgumentNullException("dc"); } if (string.IsNullOrEmpty(text)) { return Size.Empty; } WindowsFontQuality fontQuality = WindowsFont.WindowsFontQualityFromTextRenderingHint(dc as Graphics); IntPtr hdc = dc.GetHdc(); try { using( WindowsGraphics wg = WindowsGraphics.FromHdc( hdc )) { using (WindowsFont wf = WindowsGraphicsCacheManager.GetWindowsFont(font, fontQuality)) { return wg.MeasureText(text, wf, proposedSize); } } } finally { dc.ReleaseHdc(); } } public static Size MeasureText(IDeviceContext dc, string text, Font font, Size proposedSize, TextFormatFlags flags ) { if (dc == null) { throw new ArgumentNullException("dc"); } if (string.IsNullOrEmpty(text)) { return Size.Empty; } WindowsFontQuality fontQuality = WindowsFont.WindowsFontQualityFromTextRenderingHint(dc as Graphics); using (WindowsGraphicsWrapper wgr = new WindowsGraphicsWrapper(dc, flags)) { using (WindowsFont wf = WindowsGraphicsCacheManager.GetWindowsFont(font, fontQuality)) { return wgr.WindowsGraphics.MeasureText(text, wf, proposedSize, GetIntTextFormatFlags(flags)); } } } internal static Color DisabledTextColor(Color backColor) { //Theme specs -- if the backcolor is darker than Control, we use // ControlPaint.Dark(backcolor). Otherwise we use ControlDark. // see VS#357226 Color disabledTextForeColor = SystemColors.ControlDark; if (ControlPaint.IsDarker(backColor, SystemColors.Control)) { disabledTextForeColor = ControlPaint.Dark(backColor); } return disabledTextForeColor; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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