I load HTML document in GeckoFX control. Hovering an HTML element (input, select & link) will highlight it with red color, moving mouse out will restore it's visual state.
One idea is to use OnPaint event and draw rectangle at mouse coordinate.
But I do not know how to use this in C# with GeckoFX control.
Any ideas on how to achieve this or to highlight HTML element are welcome.
Thank you.
Not sure what kind of highlight you have in mind, but in any case you should be able to use Style for it.
For example, you can use DomMouseOver event of GeckoWebBrowser and in the event handler check if the element that the mouse is over is the element you want to highlight (by id, by tag name, by class name). If so, then maybe something like
theElement.SetAttribute("style", "background: #" + color);
would be sufficient?
Also another way to do it would be to inject html / javascript or css to the page you are browsing and handling it from that side.
I do both of these things, though I prefer the first one because it's easier to manage from c# code...
Related
I use VS 2010 . I add button to webfrom that created, but I can't change his position.
I read in previous questions that I need to change the layout to absolute , but it didn't work. when I drag the button to the center it's back automatically to left-center..
you can see that in the picture:
how can I fix that?
Thank you!!
solution:
Tools -> Options, and set HTML Designer -> CSS Styling to "Change positioning to absolute.."
Changing the position to absolute seems more like a workaround which would introduce further problems after "solving" this one. Unless you really know what you're doing for styling, don't do that.
Centering an element on a webpage is really a matter for the CSS styling. Take a look at the markup (HTML) view and find where that button is. You can add a class to that button for the CSS styling:
<asp:Button runat="server" ID="Button1" CssClass="centeredButton" ...
Then in your site's CSS file (Site.css might be the standard in the ASP.NET template? I don't remember) you can apply the styling you're looking for. There's a lot you can do at that point. Not knowing how the rest of the page is laid out, I can only offer very random suggestions. Something like this for example:
.centeredButton {
display: block;
margin: auto;
}
That's one way to center that particular element. There are definitely more, depending on how the rest of the markup/layout is structured.
First of all i recommend not to use this drag options. Because what happens behind this whenever you drag a button or anything, will make you more confused. You can do it using div or table.
I am doing a website using asp.net C# and I would like to popup a small window with information as soon as mouse hover a particular word. I know that I have to use jquery but I don't know exactly how to do it.
Any suggestions please?
There are many plugins out there that will help you achieve what you are looking for. However it is also very possible to implement this functionality yourself. I wouldn't be surprised either if some of the plugins you come across also use similar code.
The following is my attempt to demystify tooltip/popup plugin behaviour.
You could wrap the desired word in a <span> element and give it a .hover class.
<div>
This is some text with a <span class="hover">special</span>
word that has hovercraft capabilities.
</div>
Your jQuery (ver 1.7+) would look something like this :
$(".hover").on('mouseenter',function(){
// The popup must be shown here (mouse is over element).
}).on('mouseleave',function(){
// The popup must be hidden here (mouse has left element).
});
I should add here that I am using a great and yet sometimes forgotten capability of jQuery called "chaining". The on() function actually returns the object that it was attached to. In this case $(".hover") - so if I want to call another function on that object I can just add it as another function at the end. Another example of this would be :
$("#myElement").text("An error has occured!").css("color","#FF0000");
That line of code would also at the text to #myElement and also turn the colour red.
With regard to your actual popup - I would suggest two things :
Have an element at the bottom of your markup (written last so highest index - or manually set the highest z-index)
You could also have the popup in a hidden element right next to the element that is supposed to trigger the popup.
What you're after sounds like a 'tool tip'.
The solutions using jQuery are somewhat involved - so I'll just direct you to external resources.
Possible solutions:
ToolTip Plugin for jQuery
Build a Better Tooltip with jQuery Awesomeness
How can I build my own search function for the webbrowser control, and if possible remove the built-in one (CTRL + F find function, that is)? Any help regarding this would be appreciated.
Edit - How would I search for text and select it? Pretty much like how the find dialog will find text and select it, I want to do that and I have messed with the document property of the page but I still can't get it to work. Any help?
That is the purpose of the WebBrowser control.
There are third party browser controls you can use instead:
GeckoFX
Mono.WebBrowser
Update (following comments):
You can capture the KeyPress events of the control to find out if ctrl+f was pressed, then use your own search algorithm on the document returned by the control.
I expect you should be able to do something similar with the third party controls as well.
I'm currently working on WYSIWYG editor using .net WebBrowser control and I need to implement spell checking.
My question is how can I get text under mouse pointer when I right click on the misspelled word to show all spell suggestions?
Tried to wrap every misspelled word in html label with javascript event, but there seems to be the problem in invoking C# code from javascript.
Ok - here are my 2 cents.
Firstly I imagine you have an editable element more than likely a div and you're using this as your WYSIWYG editor. I also guess you have an Ajax function somewhere that you've setup on a certain keystroke to check the spelling of the entire (maybe even some) of the contents of the DIV, and it can send you back a list of the misspelled words.
My idea is - 1. Create a range on the contents of your editable div, then do a search for the word using the TextRange object - here : http://msdn.microsoft.com/en-us/library/ms535872%28VS.85%29.aspx. Use the findText method which Searches for text in the document (range) and positions the start and end points of the range to encompass the search string.
Once you have this you should copy the text value into a variable, then construct a < Span> possibly even set the bottom-border style of the span to have a red underline, or even use an image so that it looks like that regular misspelled squiggly wave. Set the inner contents of this Span to the value of the original misspelled word. Also don't forget to assign an onclick (or right click) to this SPAN, so you can do another lookup on spelling suggestions later. Great, now you have an offline SPAN but its not yet inserted into the document.
Next step: Use the TextRange pasteHTML method to paste the new SPAN into the document, remember the range should already be defined from the find operation, so you shouldn't have to mess around looking for the text again (or selecting it).
Once the span is in the document using pasteHTML, it should be straight forward, just create another div, absolutely position it just under the SPAN so when the user right clicks it - the "context menu comes up" - populated by Ajax.
After that it should be a very easy case of creating another range, and replacing this time the SPAN with just straightforward text.
ALL of this is theory, but hope it helps!
Also you might want to check out - http://www.aspfree.com/c/a/Code-Examples/Searching-Body-Text-with-textRange-Enter-the-Gecko/ - which will help you make the whole solution work in FireFox (not only IE)
I'll add some more two cents in as I'm currently working on something similar.
Okay, so I'm assuming you are a WebBrowser object? If so, my suggestion would be to use a contextual menu strip every time you every time you right click. From there you can fire the context menu Opening event that will grab that specific HTML element for you.
In short you could use a similar code snippet
Point mouseLocation;
private void ToolStripMenuItem_Click(object sender, EventArgs e)
{
HtmlElement elem = webBrowser.Document.GetElementFromPoint(mouseLocation);
//From here you would do what ever it is you need for your element in the browser
}
private void webContextMenuStrip_Opening(object sender, CancelEventArgs e)
{
//This just gets you the specific mouse position for the given element
mouseLocation = webBrowser.PointToClient(MousePosition);
}
Hope this atleast gets you started and best of luck!
We are using the WebBrowser control in c# winforms and need to be able to get information about the Url the cursor is positioned on.
So we have a web page in design mode, which has multiple urls, when the cursor is over one I would like to call a method which would return the id of the link.
Thanks
You can use the IHTMLCaret to get the cursor position from there using IMarkupPointer you can get the element in the current scope.
The webBrowser control has a Document property which has a Links collection. Each Link is an HTMLElement which has events you can tap into. Again, I'm not sure what you mean "cursor" because in the web world, unless if you're in a textbox, there really isn't a "cursor" (which is what I meant to ask in my comment) but you can tap into the MouseOver event and other stuff like that.
Example:
foreach (HtmlElement element in this.webBrowser1.Document.Links)
{
element.MouseOver += (o, ex) =>
{
Console.WriteLine(ex.ToElement.GetAttribute("HREF"));
};
}
This will print out the actual URL that the mouse is over.
You can have a look at this article - Hosting a web browser component in a C# winform - which explains several ways to perform that. or go directly to this one - Hosting a webpage inside a Windows Form - Basically what you need to do is handle the Click of the DOM object inside the COM WebBrowser of IE. You achieve this by handling the Js events inside your C# code.
I remember this kind of customization must be done using the AxSHDocVw.AxWebBrowser COM object instead of the System.Windows.Forms.WebBrowser Class from the newer versions of the .Net Framework.
I could send you more data about this, I did it some project, just give me time to find it ;). In the mean time try with those links.
By!