mirror of https://github.com/dahall/Vanara.git
236 lines
12 KiB
C#
236 lines
12 KiB
C#
using System.Drawing;
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using System.Drawing.Drawing2D;
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using System.Drawing.Imaging;
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using System.Windows.Forms;
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using System.Windows.Forms.VisualStyles;
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using Vanara.PInvoke;
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using static Vanara.PInvoke.Gdi32;
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using static Vanara.PInvoke.UxTheme;
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namespace Vanara.Extensions;
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/// <summary>
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/// Extension methods for <see cref="VisualStyleRenderer"/> for glass effects and extended method functionality. Also provides GetFont2
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/// and GetMargins2 methods that corrects base library's non-functioning methods.
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/// </summary>
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public static partial class VisualStylesRendererExtension
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{
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//private static readonly Dictionary<long, Bitmap> bmpCache = new();
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private delegate void DrawWrapperMethod(HDC hdc);
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/// <summary>
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/// Draws the background image of the current visual style element within the specified bounding rectangle and optionally clipped to
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/// the specified clipping rectangle.
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/// </summary>
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/// <param name="rnd">The <see cref="VisualStyleRenderer"/> instance.</param>
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/// <param name="dc">The <see cref="IDeviceContext"/> used to draw the background image.</param>
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/// <param name="bounds">A <see cref="System.Drawing.Rectangle"/> in which the background image is drawn.</param>
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/// <param name="clipRectangle">A <see cref="System.Drawing.Rectangle"/> that defines a clipping rectangle for the drawing operation.</param>
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/// <param name="rightToLeft">If set to <c>true</c> flip the image for right to left layout.</param>
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public static void DrawBackground(this VisualStyleRenderer rnd, IDeviceContext dc, Rectangle bounds, Rectangle? clipRectangle = null, bool rightToLeft = false) =>
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/*
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{
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var h = rnd.GetHashCode();
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Bitmap bmp;
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if (!bmpCache.TryGetValue(h, out bmp))
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bmpCache.Add(h, bmp = GraphicsExtension.GetTransparentBitmap(GetBackgroundBitmap(rnd, Color.White), GetBackgroundBitmap(rnd, Color.Black)));
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if (rightToLeft)
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bmp.RotateFlip(RotateFlipType.RotateNoneFlipX);
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if (clipRectangle != null) dc.SetClip(clipRectangle.Value);
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using (var attr = new ImageAttributes())
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{
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dc.CompositingMode = CompositingMode.SourceOver;
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dc.CompositingQuality = CompositingQuality.HighQuality;
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dc.InterpolationMode = InterpolationMode.HighQualityBicubic;
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dc.PixelOffsetMode = PixelOffsetMode.HighQuality;
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attr.SetWrapMode(WrapMode.TileFlipXY);
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dc.DrawImage(bmp, bounds, 0, 0, bmp.Width, bmp.Height, GraphicsUnit.Pixel, attr);
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}*/
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rnd.DrawBackground(dc, bounds, clipRectangle ?? bounds);
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/// <summary>
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/// Draws the background image of the current visual style element onto a glass background within the specified bounding rectangle
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/// and optionally clipped to the specified clipping rectangle.
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/// </summary>
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/// <param name="rnd">The <see cref="VisualStyleRenderer"/> instance.</param>
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/// <param name="dc">The <see cref="IDeviceContext"/> used to draw the background image.</param>
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/// <param name="bounds">A <see cref="System.Drawing.Rectangle"/> in which the background image is drawn.</param>
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/// <param name="clipRectangle">A <see cref="System.Drawing.Rectangle"/> that defines a clipping rectangle for the drawing operation.</param>
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/// <param name="rightToLeft">If set to <c>true</c> flip the image for right to left layout.</param>
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public static void DrawGlassBackground(this VisualStyleRenderer rnd, IDeviceContext dc, Rectangle bounds, Rectangle? clipRectangle = null, bool rightToLeft = false)
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{
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var ht = new SafeHTHEME(rnd.Handle, false);
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dc.DrawViaDIB(bounds, (memoryHdc, b) =>
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{
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var rBounds = new RECT(bounds);
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//var opts = new DrawThemeBackgroundOptions(clipRectangle);
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// Draw background
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var oldLayout = DCLayout.GDI_ERROR;
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if (rightToLeft)
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if ((oldLayout = SetLayout(memoryHdc, DCLayout.LAYOUT_RTL)) == DCLayout.GDI_ERROR)
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throw new NotSupportedException("Unable to change graphics layout to RTL.");
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DrawThemeBackground(ht, memoryHdc, rnd.Part, rnd.State, rBounds, clipRectangle);
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if (oldLayout != DCLayout.GDI_ERROR)
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SetLayout(memoryHdc, oldLayout);
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});
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}
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/// <summary>Draws the image from the specified <paramref name="imageList"/> within the specified bounds on a glass background.</summary>
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/// <param name="rnd">The <see cref="VisualStyleRenderer"/> instance.</param>
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/// <param name="g">The <see cref="Graphics"/> used to draw the image.</param>
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/// <param name="bounds">A <see cref="System.Drawing.Rectangle"/> in which the image is drawn.</param>
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/// <param name="imageList">An <see cref="ImageList"/> that contains the <see cref="Image"/> to draw.</param>
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/// <param name="imageIndex">The index of the <see cref="Image"/> within <paramref name="imageList"/> to draw.</param>
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public static void DrawGlassImage(this VisualStyleRenderer rnd, IDeviceContext g, Rectangle bounds, ImageList imageList, int imageIndex)
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{
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var ht = new SafeHTHEME(rnd.Handle, false);
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g.DrawViaDIB(bounds, (memoryHdc, b) =>
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DrawThemeIcon(ht, memoryHdc, rnd.Part, rnd.State, bounds, imageList.Handle, imageIndex));
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}
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/// <summary>Draws the specified image within the specified bounds on a glass background.</summary>
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/// <param name="rnd">The <see cref="VisualStyleRenderer"/> instance.</param>
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/// <param name="g">The <see cref="Graphics"/> used to draw the image.</param>
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/// <param name="bounds">A <see cref="System.Drawing.Rectangle"/> in which the image is drawn.</param>
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/// <param name="image">An <see cref="ImageList"/> that contains the <see cref="Image"/> to draw.</param>
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/// <param name="disabled">
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/// if set to <c>true</c> draws the image in a disabled state using the <see cref="ControlPaint.DrawImageDisabled"/> method.
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/// </param>
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public static void DrawGlassImage(this VisualStyleRenderer? rnd, IDeviceContext g, Rectangle bounds, Image image, bool disabled = false) =>
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g.DrawViaDIB(bounds, (memoryHdc, b) =>
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{
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using var mg = Graphics.FromHdc(memoryHdc.DangerousGetHandle());
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if (disabled)
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ControlPaint.DrawImageDisabled(mg, image, bounds.X, bounds.Y, Color.Transparent);
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else
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mg.DrawImage(image, bounds);
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});
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/// <summary>
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/// Draws glowing text in the specified bounding rectangle with the option of overriding text color and applying other text formatting.
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/// </summary>
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/// <param name="rnd">The <see cref="VisualStyleRenderer"/> instance.</param>
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/// <param name="dc">The <see cref="IDeviceContext"/> used to draw the text.</param>
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/// <param name="bounds">A <see cref="System.Drawing.Rectangle"/> in which the text is drawn.</param>
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/// <param name="text">The text to draw.</param>
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/// <param name="font">Optional font override.</param>
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/// <param name="color">Optionally, the color to draw text in overriding the default color for the theme.</param>
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/// <param name="flags">A bitwise combination of the <see cref="TextFormatFlags"/> values.</param>
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/// <param name="glowSize">The size of the glow.</param>
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public static void DrawGlowingText(this VisualStyleRenderer rnd, IDeviceContext dc, Rectangle bounds, string text, Font font, Color? color, TextFormatFlags flags = TextFormatFlags.Default, int glowSize = 10)
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{
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var ht = new SafeHTHEME(rnd.Handle, false);
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dc.DrawViaDIB(bounds, (memoryHdc, b) =>
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{
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// Create and select font
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using (new GdiObjectContext(memoryHdc, new SafeHFONT(font?.ToHfont() ?? IntPtr.Zero)))
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{
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// Draw glowing text
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var dttOpts = new DTTOPTS(null) { GlowSize = glowSize, AntiAliasedAlpha = true };
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if (color != null) dttOpts.TextColor = color.Value;
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var textBounds = new RECT(4, 0, bounds.Right - bounds.Left, bounds.Bottom - bounds.Top);
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DrawThemeTextEx(ht, memoryHdc, rnd.Part, rnd.State, text, text.Length, FromTFF(flags), ref textBounds, dttOpts);
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}
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}
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);
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}
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/// <summary>Draws text in the specified bounding rectangle with the option of applying other text formatting.</summary>
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/// <param name="rnd">The <see cref="VisualStyleRenderer"/> instance.</param>
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/// <param name="dc">The <see cref="IDeviceContext"/> used to draw the text.</param>
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/// <param name="bounds">A <see cref="System.Drawing.Rectangle"/> in which the text is drawn.</param>
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/// <param name="text">The text to draw.</param>
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/// <param name="flags">A bitwise combination of the <see cref="TextFormatFlags"/> values.</param>
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/// <param name="options">The <see cref="DTTOPTS"/> .</param>
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public static void DrawText(this VisualStyleRenderer rnd, IDeviceContext dc, ref Rectangle bounds, string text, TextFormatFlags flags, ref DTTOPTS options)
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{
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var rc = new RECT(bounds);
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var ht = new SafeHTHEME(rnd.Handle, false);
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using (var hdc = new SafeTempHDC(dc))
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DrawThemeTextEx(ht, hdc, rnd.Part, rnd.State, text, text.Length, FromTFF(flags), ref rc, options);
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bounds = rc;
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}
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/// <summary>
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/// Gets the background image of the current visual style element within the specified background color. If <paramref name="states"/>
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/// is set, the resulting image will contain each of the state images side by side.
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/// </summary>
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/// <param name="rnd">The <see cref="VisualStyleRenderer"/> instance.</param>
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/// <param name="clr">The background color. This color cannot have an alpha channel.</param>
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/// <param name="states">The optional list of states to render side by side.</param>
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/// <returns>The background image.</returns>
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public static Bitmap GetBackgroundBitmap(this VisualStyleRenderer rnd, Color clr, int[]? states = null)
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{
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const int wh = 200;
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if (rnd == null) throw new ArgumentNullException(nameof(rnd));
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rnd.SetParameters(rnd.Class, rnd.Part, 0);
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if (states == null || states.Length == 0) states = new[] { rnd.State };
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var i = states.Length;
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// Get image size
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Size imgSz;
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using (var sg = Graphics.FromHwnd(IntPtr.Zero))
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imgSz = rnd.GetPartSize(sg, new Rectangle(0, 0, wh, wh), ThemeSizeType.Draw);
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if (imgSz.Width == 0 || imgSz.Height == 0)
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imgSz = new Size(rnd.GetInteger(IntegerProperty.Width), rnd.GetInteger(IntegerProperty.Height));
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if (imgSz.Width == 0 || imgSz.Height == 0)
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{
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using var sg = Graphics.FromHwnd(IntPtr.Zero);
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imgSz = MaxSize(rnd.GetPartSize(sg, new Rectangle(0, 0, wh, wh), ThemeSizeType.Minimum), imgSz);
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}
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var bounds = new Rectangle(0, 0, imgSz.Width * i, imgSz.Height);
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// Draw each background linearly down the bitmap
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using var memoryHdc = SafeHDC.ScreenCompatibleDCHandle;
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// Create a device-independent bitmap and select it into our DC
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var info = new BITMAPINFO(bounds.Width, -bounds.Height);
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using (memoryHdc.SelectObject(CreateDIBSection(HDC.NULL, info, DIBColorMode.DIB_RGB_COLORS, out var ppv)))
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{
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using (var memoryGraphics = Graphics.FromHdc(memoryHdc.DangerousGetHandle()))
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{
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// Setup graphics
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memoryGraphics.CompositingMode = CompositingMode.SourceOver;
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memoryGraphics.CompositingQuality = CompositingQuality.HighQuality;
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memoryGraphics.SmoothingMode = SmoothingMode.HighQuality;
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memoryGraphics.Clear(clr);
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// Draw each background linearly down the bitmap
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var rect = new Rectangle(0, 0, imgSz.Width, imgSz.Height);
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foreach (var state in states)
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{
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rnd.SetParameters(rnd.Class, rnd.Part, state);
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rnd.DrawBackground(memoryGraphics, rect);
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rect.X += imgSz.Width;
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}
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}
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// Copy DIB to Bitmap
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var bmp = new Bitmap(bounds.Width, bounds.Height, PixelFormat.Format32bppArgb);
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using (var primaryHdc = new SafeTempHDC(Graphics.FromImage(bmp)))
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BitBlt(primaryHdc, bounds.Left, bounds.Top, bounds.Width, bounds.Height, memoryHdc, 0, 0, RasterOperationMode.SRCCOPY);
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return bmp;
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}
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}
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/// <summary>Returns the value of the specified font property for the current visual style element.</summary>
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/// <param name="rnd">The <see cref="VisualStyleRenderer"/> instance.</param>
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/// <param name="dc">The <see cref="IDeviceContext"/> used to draw the text.</param>
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/// <param name="defaultValue">A value to return if the system has no font defined for this <see cref="VisualStyleRenderer"/> instance.</param>
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/// <returns>
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/// A <see cref="Font"/> that contains the value of the property specified by the prop parameter for the current visual style element.
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/// </returns>
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public static Font? GetFont2(this VisualStyleRenderer rnd, IDeviceContext? dc = null, Font? defaultValue = null)
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{
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using var hdc = new SafeTempHDC(dc);
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return 0 != GetThemeFont(new SafeHTHEME(rnd.Handle, false), hdc, rnd.Part, rnd.State, 210, out var f)
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? defaultValue : Font.FromLogFont(f);
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}
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private static DrawTextFlags FromTFF(TextFormatFlags tff) => (DrawTextFlags)(int)tff;
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private static long GetHashCode(this VisualStyleRenderer r) => (long)r.Class.GetHashCode() << 32 | ((uint)r.Part << 16 | (ushort)r.State);
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private static Size MaxSize(Size sz1, Size sz2) => new(Math.Max(sz1.Width, sz2.Width), Math.Max(sz1.Height, sz2.Height));
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} |