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Replaced DrawWrapper with DrawViaDIB method

pull/30/head
David Hall 2019-01-10 08:03:39 -07:00
parent 886539dba7
commit 0804effa03
1 changed files with 42 additions and 71 deletions
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113
WIndows.Forms/Extensions/VisualStylesRendererExtensionGDI.cs
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@ -12,8 +12,8 @@ using static Vanara.PInvoke.UxTheme;
namespace Vanara.Extensions
{
/// <summary>
/// Extension methods for <see cref="VisualStyleRenderer"/> for glass effects and extended method functionality. Also provides GetFont2 and GetMargins2
/// methods that corrects base library's non-functioning methods.
/// Extension methods for <see cref="VisualStyleRenderer"/> for glass effects and extended method functionality. Also provides GetFont2
/// and GetMargins2 methods that corrects base library's non-functioning methods.
/// </summary>
public static partial class VisualStylesRendererExtension
{
@ -22,7 +22,8 @@ namespace Vanara.Extensions
private delegate void DrawWrapperMethod(HDC hdc);
/// <summary>
/// Draws the background image of the current visual style element within the specified bounding rectangle and optionally clipped to the specified clipping rectangle.
/// Draws the background image of the current visual style element within the specified bounding rectangle and optionally clipped to
/// the specified clipping rectangle.
/// </summary>
/// <param name="rnd">The <see cref="VisualStyleRenderer"/> instance.</param>
/// <param name="dc">The <see cref="IDeviceContext"/> used to draw the background image.</param>
@ -51,7 +52,8 @@ namespace Vanara.Extensions
}
/// <summary>
/// Draws the background image of the current visual style element onto a glass background within the specified bounding rectangle and optionally clipped to the specified clipping rectangle.
/// Draws the background image of the current visual style element onto a glass background within the specified bounding rectangle
/// and optionally clipped to the specified clipping rectangle.
/// </summary>
/// <param name="rnd">The <see cref="VisualStyleRenderer"/> instance.</param>
/// <param name="dc">The <see cref="IDeviceContext"/> used to draw the background image.</param>
@ -61,8 +63,7 @@ namespace Vanara.Extensions
public static void DrawGlassBackground(this VisualStyleRenderer rnd, IDeviceContext dc, Rectangle bounds, Rectangle? clipRectangle = null, bool rightToLeft = false)
{
var ht = new SafeHTHEME(rnd.Handle, false);
DrawWrapper(dc, bounds,
memoryHdc =>
dc.DrawViaDIB(bounds, (memoryHdc, b) =>
{
var rBounds = new RECT(bounds);
//var opts = new DrawThemeBackgroundOptions(clipRectangle);
@ -78,9 +79,7 @@ namespace Vanara.Extensions
);
}
/// <summary>
/// Draws the image from the specified <paramref name="imageList"/> within the specified bounds on a glass background.
/// </summary>
/// <summary>Draws the image from the specified <paramref name="imageList"/> within the specified bounds on a glass background.</summary>
/// <param name="rnd">The <see cref="VisualStyleRenderer"/> instance.</param>
/// <param name="g">The <see cref="Graphics"/> used to draw the image.</param>
/// <param name="bounds">A <see cref="Rectangle"/> in which the image is drawn.</param>
@ -89,28 +88,23 @@ namespace Vanara.Extensions
public static void DrawGlassImage(this VisualStyleRenderer rnd, IDeviceContext g, Rectangle bounds, ImageList imageList, int imageIndex)
{
var ht = new SafeHTHEME(rnd.Handle, false);
DrawWrapper(g, bounds,
memoryHdc =>
{
DrawThemeIcon(ht, memoryHdc, rnd.Part, rnd.State, bounds, imageList.Handle, imageIndex);
}
);
g.DrawViaDIB(bounds, (memoryHdc, b) =>
DrawThemeIcon(ht, memoryHdc, rnd.Part, rnd.State, bounds, imageList.Handle, imageIndex));
}
/// <summary>
/// Draws the specified image within the specified bounds on a glass background.
/// </summary>
/// <param name="rnd">The <see cref="VisualStyleRenderer" /> instance.</param>
/// <param name="g">The <see cref="Graphics" /> used to draw the image.</param>
/// <param name="bounds">A <see cref="Rectangle" /> in which the image is drawn.</param>
/// <param name="image">An <see cref="ImageList" /> that contains the <see cref="Image" /> to draw.</param>
/// <param name="disabled">if set to <c>true</c> draws the image in a disabled state using the <see cref="ControlPaint.DrawImageDisabled"/> method.</param>
/// <summary>Draws the specified image within the specified bounds on a glass background.</summary>
/// <param name="rnd">The <see cref="VisualStyleRenderer"/> instance.</param>
/// <param name="g">The <see cref="Graphics"/> used to draw the image.</param>
/// <param name="bounds">A <see cref="Rectangle"/> in which the image is drawn.</param>
/// <param name="image">An <see cref="ImageList"/> that contains the <see cref="Image"/> to draw.</param>
/// <param name="disabled">
/// if set to <c>true</c> draws the image in a disabled state using the <see cref="ControlPaint.DrawImageDisabled"/> method.
/// </param>
public static void DrawGlassImage(this VisualStyleRenderer rnd, IDeviceContext g, Rectangle bounds, Image image, bool disabled = false)
{
DrawWrapper(g, bounds,
memoryHdc =>
g.DrawViaDIB(bounds, (memoryHdc, b) =>
{
using (var mg = Graphics.FromHdc((IntPtr)memoryHdc))
using (var mg = Graphics.FromHdc(memoryHdc.DangerousGetHandle()))
{
if (disabled)
ControlPaint.DrawImageDisabled(mg, image, bounds.X, bounds.Y, Color.Transparent);
@ -124,25 +118,24 @@ namespace Vanara.Extensions
/// <summary>
/// Draws glowing text in the specified bounding rectangle with the option of overriding text color and applying other text formatting.
/// </summary>
/// <param name="rnd">The <see cref="VisualStyleRenderer" /> instance.</param>
/// <param name="dc">The <see cref="IDeviceContext" /> used to draw the text.</param>
/// <param name="bounds">A <see cref="Rectangle" /> in which the text is drawn.</param>
/// <param name="rnd">The <see cref="VisualStyleRenderer"/> instance.</param>
/// <param name="dc">The <see cref="IDeviceContext"/> used to draw the text.</param>
/// <param name="bounds">A <see cref="Rectangle"/> in which the text is drawn.</param>
/// <param name="text">The text to draw.</param>
/// <param name="font">Optional font override.</param>
/// <param name="color">Optionally, the color to draw text in overriding the default color for the theme.</param>
/// <param name="flags">A bitwise combination of the <see cref="TextFormatFlags" /> values.</param>
/// <param name="flags">A bitwise combination of the <see cref="TextFormatFlags"/> values.</param>
/// <param name="glowSize">The size of the glow.</param>
public static void DrawGlowingText(this VisualStyleRenderer rnd, IDeviceContext dc, Rectangle bounds, string text, Font font, Color? color, TextFormatFlags flags = TextFormatFlags.Default, int glowSize = 10)
{
var ht = new SafeHTHEME(rnd.Handle, false);
DrawWrapper(dc, bounds,
memoryHdc =>
dc.DrawViaDIB(bounds, (memoryHdc, b) =>
{
// Create and select font
using (new GdiObjectContext(memoryHdc, new SafeHFONT(font?.ToHfont() ?? IntPtr.Zero)))
{
// Draw glowing text
var dttOpts = new DTTOPTS(null) {GlowSize = glowSize, AntiAliasedAlpha = true};
var dttOpts = new DTTOPTS(null) { GlowSize = glowSize, AntiAliasedAlpha = true };
if (color != null) dttOpts.TextColor = color.Value;
var textBounds = new RECT(4, 0, bounds.Right - bounds.Left, bounds.Bottom - bounds.Top);
DrawThemeTextEx(ht, memoryHdc, rnd.Part, rnd.State, text, text.Length, FromTFF(flags), ref textBounds, dttOpts);
@ -151,12 +144,10 @@ namespace Vanara.Extensions
);
}
/// <summary>
/// Draws text in the specified bounding rectangle with the option of applying other text formatting.
/// </summary>
/// <param name="rnd">The <see cref="VisualStyleRenderer" /> instance.</param>
/// <param name="dc">The <see cref="IDeviceContext" /> used to draw the text.</param>
/// <param name="bounds">A <see cref="Rectangle" /> in which the text is drawn.</param>
/// <summary>Draws text in the specified bounding rectangle with the option of applying other text formatting.</summary>
/// <param name="rnd">The <see cref="VisualStyleRenderer"/> instance.</param>
/// <param name="dc">The <see cref="IDeviceContext"/> used to draw the text.</param>
/// <param name="bounds">A <see cref="Rectangle"/> in which the text is drawn.</param>
/// <param name="text">The text to draw.</param>
/// <param name="flags">A bitwise combination of the <see cref="TextFormatFlags"/> values.</param>
/// <param name="options">The <see cref="DTTOPTS"/> .</param>
@ -169,10 +160,9 @@ namespace Vanara.Extensions
bounds = rc;
}
private static DrawTextFlags FromTFF(TextFormatFlags tff) => (DrawTextFlags)(int)tff;
/// <summary>
/// Gets the background image of the current visual style element within the specified background color. If <paramref name="states"/> is set, the resulting image will contain each of the state images side by side.
/// Gets the background image of the current visual style element within the specified background color. If <paramref name="states"/>
/// is set, the resulting image will contain each of the state images side by side.
/// </summary>
/// <param name="rnd">The <see cref="VisualStyleRenderer"/> instance.</param>
/// <param name="clr">The background color. This color cannot have an alpha channel.</param>
@ -234,45 +224,26 @@ namespace Vanara.Extensions
}
}
private static Size MaxSize(Size sz1, Size sz2) => new Size(Math.Max(sz1.Width, sz2.Width), Math.Max(sz1.Height, sz2.Height));
/// <summary>
/// Returns the value of the specified font property for the current visual style element.
/// </summary>
/// <param name="rnd">The <see cref="VisualStyleRenderer" /> instance.</param>
/// <param name="dc">The <see cref="IDeviceContext" /> used to draw the text.</param>
/// <summary>Returns the value of the specified font property for the current visual style element.</summary>
/// <param name="rnd">The <see cref="VisualStyleRenderer"/> instance.</param>
/// <param name="dc">The <see cref="IDeviceContext"/> used to draw the text.</param>
/// <param name="defaultValue">A value to return if the system has no font defined for this <see cref="VisualStyleRenderer"/> instance.</param>
/// <returns>A <see cref="Font"/> that contains the value of the property specified by the prop parameter for the current visual style element.</returns>
/// <returns>
/// A <see cref="Font"/> that contains the value of the property specified by the prop parameter for the current visual style element.
/// </returns>
public static Font GetFont2(this VisualStyleRenderer rnd, IDeviceContext dc = null, Font defaultValue = null)
{
using (var hdc = new SafeHDC(dc))
{
return 0 != GetThemeFont(new SafeHTHEME(rnd.Handle, false), hdc, rnd.Part, rnd.State, 210, out LOGFONT f)
return 0 != GetThemeFont(new SafeHTHEME(rnd.Handle, false), hdc, rnd.Part, rnd.State, 210, out var f)
? defaultValue : Font.FromLogFont(f);
}
}
private static void DrawWrapper(IDeviceContext dc, Rectangle bounds, DrawWrapperMethod func)
{
using (var sdc = new SafeHDC(dc))
{
// Create a memory DC so we can work off screen
using (var memoryHdc = sdc.GetCompatibleDCHandle())
{
// Create a device-independent bitmap and select it into our DC
var info = new BITMAPINFO(bounds.Width, -bounds.Height);
using (memoryHdc.SelectObject(CreateDIBSection(sdc, ref info, 0, out var pBits, IntPtr.Zero, 0)))
{
// Call method
func(memoryHdc);
// Copy to foreground
BitBlt(sdc, bounds.Left, bounds.Top, bounds.Width, bounds.Height, memoryHdc, 0, 0, RasterOperationMode.SRCCOPY);
}
}
}
}
private static DrawTextFlags FromTFF(TextFormatFlags tff) => (DrawTextFlags)(int)tff;
private static long GetHashCode(this VisualStyleRenderer r) => (long)r.Class.GetHashCode() << 32 | ((uint)r.Part << 16 | (ushort)r.State);
private static Size MaxSize(Size sz1, Size sz2) => new Size(Math.Max(sz1.Width, sz2.Width), Math.Max(sz1.Height, sz2.Height));
}
}