Change webbrowser Cursor - c#

I have a form that contains WebBrowser control.
I need to change the cursor to WebBrowser.
I try
this.Cursor = System.Windows.Forms.Cursors.WaitCursor;
this.TopLevelControl.Cursor = Cursors.WaitCursor;
The cursor changes form only, but not for WebBrowser.
How can I change the cursor in WebBrowser control?


Add a reference to your solution to "mshtml.dll". After you load your Document, try this:
IHTMLDocument2 doc = (webDocument1.Document.DomDocument) as IHTMLDocument2;
IHTMLStyleSheet style = doc.createStyleSheet("", 0);
style.cssText = #"body { cursor: wait; }";
Please bear in mind that the result depends also on the way you load the web page (load a local/embedded file, set the DocumentStream, etc.).


Reason for Failure:
you are setting the Cursor for Form Instead of WebBrowser Control as below:
this.Cursor = System.Windows.Forms.Cursors.WaitCursor;
thats why it is setting the cursor to Form instead of WebBrowser Control.
you can set the Cursor for any Control as below:
controlName.Cursor=System.Windows.Forms.Cursors.WaitCursor;
but WebBrowser control does not support the Cursor property.
hence you can not set this property for WebBrowser Control.even if you set it, it does not give compile errors but throws following Runtime Error.
WebBrowser Control does not Support the Cursor Property.


Try this:
Icon ico = new Icon(#"C:\temp\someIcon.ico");
this.Cursor = new Cursor(ico.Handle);
The static class System.Windows.Forms.Cursors contains all system cursors.
To switch back to the default system cursor, use this:
this.Cursor = System.Windows.Forms.Cursors.Default;


If you set the cursor of a Form with a WebBrowser control in it, the Form will show the wait cursor, but the browser will not, because the browser sets the cursor on it's own corresponding to the HTML content. For example if you move the mouse over a hyperlink, Internet Explorer changes the cursor to the hand cursor. Also JavaScript and CSS can modify the cursor. So there is no way to set a WaitCursor while Internet Explorer is controling the cursor.
But I found a trick to do this with one line of code!
If you do a lengthy processing and want to display the wait cursor meanwhile, you can use this code to turn it on and off:
public void SetWaitCursor(bool b_Wait)
{
Application.UseWaitCursor = b_Wait;
// The Browser control must be disabled otherwise it does not show the wait cursor.
webBrowser.Enabled = !b_Wait;
Application.DoEvents();
}
The trick is disabling the browser control and it will show the Wait Cursor because a disabled Internet Explorer does not control the cursor anymore.
So your final code will look like this:
SetWaitCursor(true);
doLenghtyProcessing();
SetWaitCursor(false);

Related

Switching pages instead of windows

So currently I'm switching to a whole new window when i use my page switch button. But what I actually would like it to do is in the same window switch to another page. I have searched the internet and found some page switch with a button but when I set it up and click the button half the screen just goes white and the other half stays. I hope someone can help me with some click event or something that can do what I need. Hope you understand what I mean.
My current code for switching windows on a button click is this:
Newpage objNewpage = new Newpage();
this.Visibility = Visibility.Hidden;
objNewpage.Show();
Put instead what I would like is to open a new page on the same window.
//Ossie

C# ChromiumWebBrowser: Prevent control from stealing focus

I'm making a program that has a Form with a ChromiumWebBrowser in it. The navigation is done automatically. When webbrowser complete it's task, I'll dispose it, create a new webbrowser, add it to form, and load a new address.
But, when the new webbrowser was created and added to form, the program jumps in front of what ever other program is in the top with focus. Example: I start my program, press the button to start its task, open notepad to type some text and my program jumps in front of it when navigating to a new site.
Even when the window is minimized, it still steals focus from other open programs.
How do I prevent it stealing focus after it is created?

As #amaitland said, this looks like a bug.
Workarounds I've used are:
1) disable the browser. This will prevent the browser from receiving mouse/keyboard input, but it won't "grey-out" the control.
Browser1 = New CefSharp.WinForms.ChromiumWebBrowser(url)
Browser1.Enabled = False
2) Pass a callback .net function for when the page loads where you simply put the focus back to winforms by focusing on a label of your choice.
Label1.Focus()

Your Form need set: this.Topmost = false;
AND just set: this.BringToFront();
Add new browser to the form just like the function as follow:
private ChromiumWebBrowser AddNewBrowser(FATabStripItem tabStrip, String url)
{
if (url == "")
{
url = OpenUrl;
txtUrl.Select();
txtUrl.Focus();
}
else
{
tabStrip.Select();
tabStrip.Focus();
}
// ...
}
Hope has help to you. Thanks !

How to save and restore the selection of a WebBrowser control?

I am using a Windows.Forms.WebBrowser control as a text editor. To alter the font size of some selected Text, I display a modal window, where the user can make chices concerning the font size and after closing that window, the previously selected text is decorated with the changes. Unfortunately as soon as the modal window opens, the selection in the main windows isn´t visible anymore and I can´t find a way to save and restore it. I can determine the selected Range using
IHTMLDocument2 htmlDocument = (IHTMLDocument2)webBrowser1.Document.DomDocument;
IHTMLSelectionObject currentSelection = htmlDocument.selection;
but since htmlDocument.selectionis readonly, I am not able to set it after the modal closes. All I Can do is call Select() on the main window, but then the caret jumps to the end of the text and nothing is selected.
Any ideas how to solve this?
(I know I could use a ComboBox to alter Font-size, but I need the custom window...for reasons.)

You can use bookmarks. Save selection as bookmark:
var bookmark = document.selection.createRange().getBookmark();
Restore:
var range = document.selection.createRange();
range.moveToBookmark(bookmark);
range.select();

Creating popup without possibility to tab to a background element

I am trying to create a popup but when it is open it is still possible to use the tab key to switch the focus to an element in the background (e.g. to a button and use space to press is). The only way I found until now is to check on every lostFocus event (which also fires for every element contained in the Border element) and check if the focus is now in a element inside the Border. If not I manually set the focus.
Is there a nicer way to keep the focus within the Border (or a Grid,...)
I'm working on a Windows 8 App.

Do you mean that using a Modal Dialog with Form.ShowDialog(Owner) still allows you to focus the parent components with Tab?
Can you give a sample of your code call?

Form2 form = new Form2(); //Make an instantiation of your Form
form.ShowDialog(); //ShowDialog()!!! NOT form.Show()!!! Or anything else :/

A few ideas:
Set Enabled to False on the background visual tree, though that might change the way things look if you still want to show them partly
Set IsHitTestVisible to False to disable pointer input
Use RenderTargetBitmap.Render() if targeting Windows 8.1 to render the content of the background to an image and simply replace all that visual tree with an image of it

Webbrowser steals focus

I'm using webbrowser control in my winforms app (c#). And when it is doing automation things, I'm losing focus control from the window I was working with. Webbrowsers' form doesn't show up also, I just lose focus from the contol. I now writing this message I have to click into textbox again and again...
How to disable such behaviour in webbrowser?
I create invisible webbrowser like that:
var br = new WebBrowser();
br.Visible = false;
br.ScriptErrorsSuppressed = true;
Please advise.

I had the same problem:
The Webbrowser Control stole focus from the application once the URL is loaded.
This worked for me:
Before Webbrowser.Navigate() method call, set the parent control of the Webbrowser to Enabled = false.
At the DocumentCompleted event of the Webbrowser, reset parent control of the Webbrowser to Enabled = true.
You can't do it directly on Webbrowser because WebBrowserBase.Enabled is not supported.
Let me know if it works for you.

You could try disabling it globally via the SystemParametersInfo api. Use SPI_SETFOREGROUNDLOCKTIMEOUT. Setting foreground lockout is a global settings, so you will want to clear this setting when you're done. A more permanent solution is to change HKCU\Control Panel\Desktop\ForegroundLockTimeout registry key. See also this discussion on social.msdn (specifically, billb08's answer).

I guess WebBrowser acquires the focus after a page is loaded by calling Navigate (or the Click method of an HtmlElement, which causes navigation). The focus could be given back to the control on the window (the TextBox) in the DocumentComplete event handler of the WebBrowser, but this is very difficult:
When would you determine which control owned the focus
originally? Before calling Navigate? This is not enough, because the
user can move to another control after calling Navigate, but before
handling DocumentComplete.
AFAIK setting the focus to a TextBox will select its whole
content, so you will have to put the cursor back to its original
position. But when would you store the original position? Same problem.
There can be more than one DocumentComplete event after a single
Navigate (or Click).
A possible solution would be to create a separate application for your hidden WebBrowser. This second application would be invisible, and could communicate with the original GUI application using some InterProcess Communication (IPC) technique. Because the WebBrowser in this case would run in a different process, you would have a better chance not to lose lose the focus and bother the user.

it's a very complex problem to fix, and should be revised by microsoft, an app just stealing the focus is not logical, it does depend on what the website is doing though. I had to resort to a CBT filter, see http://msdn.microsoft.com/en-us/magazine/cc188966.aspx, and filter out unwanted HCBT_ACTIVATE and HCBT_SETFOCUS (return 1;). You can use GetWindowClass(wParam) to see what's going on.
Even above didn't entirely work, the app window would still pop to the front temporarily so worked around that using SetWindowPos HWND_TOPMOST and HWND_NOTOPMOST on the window currently in foreground. The HCBT_SETFOCUS gets hit 2 or 3 times so on 1st set HWND_TOPMOST and last set HWND_NOTOPMOST. Count how many classname == "Internet Explorer_Server" which should be 2 (or possibly depends on website?), the other is "Shell Embedding" but doesn't always occur. Hope it helps.

I was looking at all the other answers to this question and they weren't working for me, but i saw the one about settings Browser.Parent.Enabled = false; i tried so and got an error, so i tried this instead it just came to mind.
Browser.Parent = new Control();
Browser.Parent.Enabled = false;
And now the problem is completely gone, it does not take away focus anymore.
I am using the web browser class as a variable, it is not on my form.
well this worked for me try it, this seemed to be a 100% solution.

Most of the methods won't work for me on more than one web browser. This method is work with any amount of web browsers;
1. Put web browser into a panel and set panel enabled to false, then navigate;
webBrowser.Parent = panelBottom;
panelWebBrowser.Enabled = false;
webBrowser.Navigate("http://www.google.com");
2. Define a navigated event to web browser and delay panels enabling for a second;
private void webBrowser_Navigated(object sender, WebBrowserNavigatedEventArgs e)
{
System.Threading.Timer timer = null;
timer = new System.Threading.Timer((obj) =>
{
panelWebBrowser.Enabled = true;
timer.Dispose();
},null, 1000, Timeout.Infinite);
}

My solution for sending the focus back to a form:
Private Sub Web_DocumentCompleted(sender As Object, e As WebBrowserDocumentCompletedEventArgs) Handles Web.DocumentCompleted
If Me.Visible = False Then
For Each f As Form In My.Application.OpenForms
If TypeOf f Is frmLogin Then
Dim fl As frmLogin = DirectCast(f, frmLogin)
If fl.Visible = True Then
fl.Focus()
Exit For
End If
End If
Next
End If
End Sub

Categories