/// <summary> /// Measure the size (width and height) required to draw the given html under given width and height restrictions.<br/> /// </summary> /// <param name="g">Device to use for measure</param> /// <param name="html">HTML source to render</param> /// <param name="maxWidth">optional: bound the width of the html to render in (default - 0, unlimited)</param> /// <param name="maxHeight">optional: bound the height of the html to render in (default - 0)</param> /// <param name="cssData">optiona: the style to use for html rendering (default - use W3 default style)</param> /// <param name="bridge">optional: used to resolve external references in html code (property, method calls)</param> /// <returns>the size required for the html</returns> public static SizeF Measure(Graphics g, string html, float maxWidth = 0, float maxHeight = 0, CssData cssData = null, object bridge = null) { ArgChecker.AssertArgNotNull(g, "g"); SizeF actualSize = SizeF.Empty; if (!string.IsNullOrEmpty(html)) { var container = new HtmlContainer(html, bridge, cssData); container.MaxSize = new SizeF(maxWidth, maxHeight); container.PerformLayout(g); actualSize = container.ActualSize; } return actualSize; }
/// <summary> /// Creates a new HTML Label /// </summary> public HtmlLabel() { SuspendLayout(); AutoSize = true; BackColor = SystemColors.Window; DoubleBuffered = true; SetStyle(ControlStyles.ResizeRedraw, true); SetStyle(ControlStyles.SupportsTransparentBackColor, true); SetStyle(ControlStyles.Opaque, false); _htmlContainer = new HtmlContainer(); _htmlContainer.AvoidImagesLateLoading = true; _htmlContainer.MaxSize = MaximumSize; _htmlContainer.LinkClicked += OnLinkClicked; _htmlContainer.RenderError += OnRenderError; _htmlContainer.Refresh += OnRefresh; _htmlContainer.StylesheetLoad += OnStylesheetLoad; _htmlContainer.ImageLoad += OnImageLoad; ResumeLayout(false); }
/// <summary> /// Init. /// </summary> public HtmlToolTip() { OwnerDraw = true; _htmlContainer = new HtmlContainer(); _htmlContainer.IsSelectionEnabled = false; _htmlContainer.IsContextMenuEnabled = false; _htmlContainer.AvoidGeometryAntialias = true; _htmlContainer.AvoidImagesLateLoading = true; _htmlContainer.LinkClicked += OnLinkClicked; _htmlContainer.RenderError += OnRenderError; _htmlContainer.Refresh += OnRefresh; _htmlContainer.StylesheetLoad += OnStylesheetLoad; _htmlContainer.ImageLoad += OnImageLoad; Popup += OnToolTipPopup; Draw += OnToolTipDraw; Disposed += OnToolTipDisposed; _linkHandlingTimer = new Timer(); _linkHandlingTimer.Tick += OnLinkHandlingTimerTick; _linkHandlingTimer.Interval = 40; }
private void OnToolTipPopup(object sender, PopupEventArgs e) { string text = GetToolTip(e.AssociatedControl); string font = string.Format(NumberFormatInfo.InvariantInfo, "font: {0}pt {1}", e.AssociatedControl.Font.Size, e.AssociatedControl.Font.FontFamily.Name); //Create fragment container _htmlContainer = new HtmlContainer(); _htmlContainer.AvoidGeometryAntialias = true; _htmlContainer.LinkClicked += OnLinkClicked; _htmlContainer.RenderError += OnRenderError; _htmlContainer.Refresh += OnRefresh; _htmlContainer.StylesheetLoad += OnStylesheetLoad; _htmlContainer.ImageLoad += OnImageLoad; _htmlContainer.SetHtml("<div><table class=htmltooltipbackground cellspacing=5 cellpadding=0 style=\"" + font + "\"><tr><td style=border:0px>" + text + "</td></tr></table></div>"); //Measure bounds of the container using (Graphics g = e.AssociatedControl.CreateGraphics()) { _htmlContainer.PerformLayout(g); } //Set the size of the tooltip e.ToolTipSize = new Size((int)Math.Round(_htmlContainer.ActualSize.Width, MidpointRounding.AwayFromZero), (int)Math.Round(_htmlContainer.ActualSize.Height, MidpointRounding.AwayFromZero)); }
/// <summary> /// Renders the specified HTML into image of unknown size that will be determined by max width/height and HTML layout.<br/> /// If <paramref name="maxWidth"/> is zero the html will use all the required width, otherwise it will perform line /// wrap as specified in the html<br/> /// If <paramref name="maxHeight"/> is zero the html will use all the required height, otherwise it will clip at the /// given max height not rendering the html below it.<br/> /// </summary> /// <param name="html">HTML source to render</param> /// <param name="maxWidth">the max width of the rendered html</param> /// <param name="maxHeight">optional: the max height of the rendered html, if above zero it will be clipped</param> /// <param name="cssData">optiona: the style to use for html rendering (default - use W3 default style)</param> /// <param name="stylesheetLoad">optional: can be used to overwrite stylesheet resolution logic</param> /// <param name="imageLoad">optional: can be used to overwrite image resolution logic</param> /// <returns>the generated image of the html</returns> public static Image RenderToImage(string html, int maxWidth, int maxHeight = 0, CssData cssData = null, EventHandler<HtmlStylesheetLoadEventArgs> stylesheetLoad = null, EventHandler<HtmlImageLoadEventArgs> imageLoad = null) { if (string.IsNullOrEmpty(html)) return new Bitmap(0, 0, PixelFormat.Format32bppArgb); using (var htmlContainer = new HtmlContainer()) { // use desktop created graphics to measure the HTML using (var measureGraphics = Graphics.FromHwnd(IntPtr.Zero)) { if (stylesheetLoad != null) htmlContainer.StylesheetLoad += stylesheetLoad; if (imageLoad != null) htmlContainer.ImageLoad += imageLoad; htmlContainer.SetHtml(html, cssData); htmlContainer.PerformLayout(measureGraphics); if (maxWidth > 0 && maxWidth < htmlContainer.ActualSize.Width) { // to allow the actual size be smaller than max we need to set max size only if it is really larger htmlContainer.MaxSize = new SizeF(maxWidth, 0); htmlContainer.PerformLayout(measureGraphics); } } var size = new Size(maxWidth > 0 ? Math.Min(maxWidth, (int) htmlContainer.ActualSize.Width) : (int) htmlContainer.ActualSize.Width, maxHeight > 0 ? Math.Min(maxHeight, (int) htmlContainer.ActualSize.Height) : (int) htmlContainer.ActualSize.Height); // create the final image to render into by measured size var image = new Bitmap(size.Width, size.Height, PixelFormat.Format32bppArgb); // create memory buffer from desktop handle that supports alpha chanel IntPtr dib; var memoryHdc = Win32Utils.CreateMemoryHdc(IntPtr.Zero, image.Width, image.Height, out dib); try { // render HTML into the memory buffer using (var memoryGraphics = Graphics.FromHdc(memoryHdc)) { memoryGraphics.Clear(Color.White); htmlContainer.PerformPaint(memoryGraphics); } // copy from memory buffer to image using (var imageGraphics = Graphics.FromImage(image)) { var imgHdc = imageGraphics.GetHdc(); Win32Utils.BitBlt(imgHdc, 0, 0, image.Width, image.Height, memoryHdc, 0, 0, Win32Utils.BitBltCopy); imageGraphics.ReleaseHdc(imgHdc); } } finally { Win32Utils.ReleaseMemoryHdc(memoryHdc, dib); } return image; } }
/// <summary> /// Renders the specified HTML into image of the requested size.<br/> /// The HTML will be layout by the given size but will be clipped if cannot fit. /// </summary> /// <param name="html">HTML source to render</param> /// <param name="size">The size of the image to render into, layout html by width and clipped by height</param> /// <param name="cssData">optiona: the style to use for html rendering (default - use W3 default style)</param> /// <param name="stylesheetLoad">optional: can be used to overwrite stylesheet resolution logic</param> /// <param name="imageLoad">optional: can be used to overwrite image resolution logic</param> /// <returns>the generated image of the html</returns> public static Image RenderToImage(string html, Size size, CssData cssData = null, EventHandler<HtmlStylesheetLoadEventArgs> stylesheetLoad = null, EventHandler<HtmlImageLoadEventArgs> imageLoad = null) { // create the final image to render into var image = new Bitmap(size.Width, size.Height, PixelFormat.Format32bppArgb); if (!string.IsNullOrEmpty(html)) { // create memory buffer from desktop handle that supports alpha chanel IntPtr dib; var memoryHdc = Win32Utils.CreateMemoryHdc(IntPtr.Zero, image.Width, image.Height, out dib); try { // create memory buffer graphics to use for HTML rendering using (var memoryGraphics = Graphics.FromHdc(memoryHdc)) { memoryGraphics.Clear(Color.White); // render HTML into the memory buffer using (var htmlContainer = new HtmlContainer()) { if (stylesheetLoad != null) htmlContainer.StylesheetLoad += stylesheetLoad; if (imageLoad != null) htmlContainer.ImageLoad += imageLoad; htmlContainer.SetHtml(html, cssData); htmlContainer.MaxSize = size; htmlContainer.PerformLayout(memoryGraphics); htmlContainer.PerformPaint(memoryGraphics); } } // copy from memory buffer to image using (var imageGraphics = Graphics.FromImage(image)) { var imgHdc = imageGraphics.GetHdc(); Win32Utils.BitBlt(imgHdc, 0, 0, image.Width, image.Height, memoryHdc, 0, 0, Win32Utils.BitBltCopy); imageGraphics.ReleaseHdc(imgHdc); } } finally { Win32Utils.ReleaseMemoryHdc(memoryHdc, dib); } } return image; }
/// <summary> /// Renders the specified HTML source on the specified location and max size restriction.<br/> /// If <paramref name="maxSize"/>.Width is zero the html will use all the required width, otherwise it will perform line /// wrap as specified in the html<br/> /// If <paramref name="maxSize"/>.Height is zero the html will use all the required height, otherwise it will clip at the /// given max height not rendering the html below it.<br/> /// Returned is the actual widht and height of the rendered html.<br/> /// </summary> /// <param name="g">Device to render with</param> /// <param name="html">HTML source to render</param> /// <param name="location">the top-left most location to start render the html at</param> /// <param name="maxSize">the max size of the rendered html (if height above zero it will be clipped)</param> /// <param name="cssData">optiona: the style to use for html rendering (default - use W3 default style)</param> /// <param name="stylesheetLoad">optional: can be used to overwrite stylesheet resolution logic</param> /// <param name="imageLoad">optional: can be used to overwrite image resolution logic</param> /// <returns>the actual size of the rendered html</returns> public static SizeF Render(Graphics g, string html, PointF location, SizeF maxSize, CssData cssData, EventHandler<HtmlStylesheetLoadEventArgs> stylesheetLoad, EventHandler<HtmlImageLoadEventArgs> imageLoad) { ArgChecker.AssertArgNotNull(g, "g"); SizeF actualSize = SizeF.Empty; if (!string.IsNullOrEmpty(html)) { Region prevClip = null; if (maxSize.Height > 0) { prevClip = g.Clip; g.SetClip(new RectangleF(location, maxSize)); } using (var container = new HtmlContainer()) { if (stylesheetLoad != null) container.StylesheetLoad += stylesheetLoad; if (imageLoad != null) container.ImageLoad += imageLoad; container.SetHtml(html, cssData); container.Location = location; container.MaxSize = maxSize; container.PerformLayout(g); container.PerformPaint(g); if (prevClip != null) { g.SetClip(prevClip, CombineMode.Replace); } actualSize = container.ActualSize; } } return actualSize; }
/// <summary> /// Measure the size (width and height) required to draw the given html under given width and height restrictions.<br/> /// </summary> /// <param name="g">Device to use for measure</param> /// <param name="html">HTML source to render</param> /// <param name="maxWidth">optional: bound the width of the html to render in (default - 0, unlimited)</param> /// <param name="cssData">optiona: the style to use for html rendering (default - use W3 default style)</param> /// <param name="stylesheetLoad">optional: can be used to overwrite stylesheet resolution logic</param> /// <param name="imageLoad">optional: can be used to overwrite image resolution logic</param> /// <returns>the size required for the html</returns> public static SizeF Measure(Graphics g, string html, float maxWidth, CssData cssData, EventHandler<HtmlStylesheetLoadEventArgs> stylesheetLoad, EventHandler<HtmlImageLoadEventArgs> imageLoad) { ArgChecker.AssertArgNotNull(g, "g"); SizeF actualSize = SizeF.Empty; if (!string.IsNullOrEmpty(html)) { using (var container = new HtmlContainer()) { if (stylesheetLoad != null) container.StylesheetLoad += stylesheetLoad; if (imageLoad != null) container.ImageLoad += imageLoad; container.SetHtml(html, cssData); container.MaxSize = new SizeF(maxWidth, 0); container.PerformLayout(g); actualSize = container.ActualSize; } } return actualSize; }
private void OnToolTipPopup(object sender, PopupEventArgs e) { string text = GetToolTip(e.AssociatedControl); string font = string.Format(NumberFormatInfo.InvariantInfo, "font: {0}pt {1}", e.AssociatedControl.Font.Size, e.AssociatedControl.Font.FontFamily.Name); //Create fragment container var documentSource = "<div><table class=htmltooltipbackground cellspacing=5 cellpadding=0 style=\"" + font + "\"><tr><td style=border:0px>" + text + "</td></tr></table></div>"; _container = new HtmlContainer(documentSource, Bridge); _container.AvoidGeometryAntialias = true; //Measure bounds of the container using (Graphics g = e.AssociatedControl.CreateGraphics()) { _container.PerformLayout(g); } //Set the size of the tooltip e.ToolTipSize = new Size((int) Math.Round(_container.ActualSize.Width, MidpointRounding.AwayFromZero), (int) Math.Round(_container.ActualSize.Height, MidpointRounding.AwayFromZero)); }
/// <summary> /// Creates new Html Container to handle the html in the control. /// </summary> private void CreateHtmlContainer() { if (_htmlContainer != null) { _htmlContainer.LinkClicked -= OnLinkClicked; _htmlContainer = null; } _htmlContainer = new HtmlContainer(Text, Bridge, _baseCssData); _htmlContainer.MaxSize = MaximumSize; if (LinkClicked != null) { _htmlContainer.LinkClicked += OnLinkClicked; } }
/// <summary> /// Release the html container resources. /// </summary> protected override void Dispose(bool disposing) { if (_htmlContainer != null) { _htmlContainer.LinkClicked -= OnLinkClicked; _htmlContainer.RenderError -= OnRenderError; _htmlContainer.Refresh -= OnRefresh; _htmlContainer.StylesheetLoad -= OnStylesheetLoad; _htmlContainer.ImageLoad -= OnImageLoad; _htmlContainer.Dispose(); _htmlContainer = null; } base.Dispose(disposing); }
/// <summary> /// Creates a new HtmlPanel and sets a basic css for it's styling. /// </summary> public HtmlPanel() { AutoScroll = true; BackColor = SystemColors.Window; DoubleBuffered = true; SetStyle(ControlStyles.ResizeRedraw, true); SetStyle(ControlStyles.SupportsTransparentBackColor, true); _htmlContainer = new HtmlContainer(); _htmlContainer.LinkClicked += OnLinkClicked; _htmlContainer.RenderError += OnRenderError; _htmlContainer.Refresh += OnRefresh; _htmlContainer.ScrollChange += OnScrollChange; _htmlContainer.StylesheetLoad += OnStylesheetLoad; _htmlContainer.ImageLoad += OnImageLoad; }
/// <summary> /// Unsubscribe from events and dispose of <see cref="_htmlContainer"/>. /// </summary> private void OnToolTipDisposed(object sender, EventArgs eventArgs) { Popup -= OnToolTipPopup; Draw -= OnToolTipDraw; Disposed -= OnToolTipDisposed; if(_htmlContainer != null) { _htmlContainer.LinkClicked -= OnLinkClicked; _htmlContainer.RenderError -= OnRenderError; _htmlContainer.Refresh -= OnRefresh; _htmlContainer.StylesheetLoad -= OnStylesheetLoad; _htmlContainer.ImageLoad -= OnImageLoad; _htmlContainer.Dispose(); _htmlContainer = null; } if( _linkHandlingTimer != null ) { _linkHandlingTimer.Dispose(); _linkHandlingTimer = null; } }
/// <summary> /// Renders the specified HTML source on the specified location and max size restriction.<br/> /// If <paramref name="maxSize"/>.Width is zero the html will use all the required width, otherwise it will perform line /// wrap as specified in the html<br/> /// If <paramref name="maxSize"/>.Height is zero the html will use all the required height, otherwise it will clip at the /// given max height not rendering the html below it.<br/> /// Returned is the actual widht and height of the rendered html.<br/> /// </summary> /// <param name="g">Device to render with</param> /// <param name="html">HTML source to render</param> /// <param name="location">the top-left most location to start render the html at</param> /// <param name="maxSize">the max size of the rendered html (if height above zero it will be clipped)</param> /// <param name="cssData">optiona: the style to use for html rendering (default - use W3 default style)</param> /// <param name="bridge">optional: used to resolve external references in html code (property and method calls)</param> /// <returns>the actual size of the rendered html</returns> public static SizeF Render(Graphics g, string html, PointF location, SizeF maxSize, CssData cssData = null, object bridge = null) { ArgChecker.AssertArgNotNull(g, "g"); SizeF actualSize = SizeF.Empty; if(!string.IsNullOrEmpty(html)) { Region prevClip = null; if (maxSize.Height > 0) { prevClip = g.Clip; g.SetClip(new RectangleF(location, maxSize)); } var container = new HtmlContainer(html, bridge, cssData); container.Location = location; container.MaxSize = maxSize; container.PerformLayout(g); container.PerformPaint(g); if (prevClip != null) { g.SetClip(prevClip, CombineMode.Replace); } actualSize = container.ActualSize; } return actualSize; }