I know that windows common dialog have a IShellBrowser interface and its class name is 'SHELLDLL_DefView'. Refer this.
How to get the IShellBrowser interface of a file open dialog?
(The file open dialog is outside's, not my application's.)
This is the same as my question but is delphi(?) ver.
I don't know delphi code. How to solve this problem as C++ or MFC code?
Here is a C/C++ translation of the Delphi code:
const UINT CWM_GETISHELLBROWSER = WM_USER + 7;
IShellBrowser *ShellBrowser = (IShellBrowser*) SendMessage(aDialog, CWM_GETISHELLBROWSER, 0, 0);
if (ShellBrowser) {
ShellBrowser->AddRef();
// use ShellBrowser as needed...
ShellBrowser->Release();
}
You might also want to read the following article, which provides a slightly more official (ie, more reliable, but more complicated) way to get an IShellBrowser for a given HWND:
Querying information from an Explorer window
Start with the ShellWindows object which represents all the open shell windows. You can enumerate through them all with the Item property... From each item, we can ask it for its window handle and see if it's the one we want... Okay, now that we have found the folder via its IWebBrowserApp, we need to get to the top shell browser. This is done by querying for the SID_STopLevelBrowser service and asking for the IShellBrowser interface.
Related
IE provides easy access to a IWebBrowser2 and IHtmlDocument2 from a HWND of a IE Frame. So you EnumWindows and EnumChildWindows and then you test the class and once you find the right ones, you can easily interact with them.
If there a way to list all open Mozilla Firefox tabs in a "MozillaWindowClass" (having its HWND), via XPCOM and C++?
I've googled long and strong but can't find much on the subject. I don't want to develop an extension / add-on but want to control the browser externally from an unrelated EXE, not from an extension DLL. Or at least some read-only access to it.
You can not use C++/XPCOM with Firefox externally like you use COM with IE, you can only use C++/XPCOM from within a binary component of your extension. So you won't be able to do it without writing an extension, and at that point it's easier to listen on tab events from JS and notify your binary component.
Note that supporting binary components in a FF is a PITA so I don't suggest you take that road without a good reason.
However, once you have an extension and a binary component the way to get a HWND from a tab is this (hope it still works, we stopped supporting FF many versions back):
static HWND GetWndHandle(nsIXULWindow * window) {
HWND hwnd = NULL;
nsCOMPtr<nsIDocShell> docshell;
nsresult res = window->GetDocShell(getter_AddRefs(docshell));
if(NS_SUCCEEDED(res)) {
nsCOMPtr<nsIBaseWindow> basewnd(do_QueryInterface(docshell));
if(basewnd) {
res = basewnd->GetParentNativeWindow((nativeWindow*)&hwnd);
if(NS_FAILED(res)) hwnd = NULL;
}
}
return hwnd;
}
With this and the notifications from the JS your binary component could provide a look up to find a tab by HWND and do stuff with it.
Does anyone know which relation may exist between registration-free COM and drag/drop functionality?
Specifically, we have a huge C++ CAD/CAM application comprising a number of EXEs and several hundreds DLLs. Many of them serve as COM servers (both in-proc and out-of-proc) and/or clients, and also implement ActiveX controls.
The most of ActiveX controls and the main CMDIFrameWnd-based window of one of EXEs implement drag/drop functionality. ActiveX controls implement the both drop source and drop target, and the main window is only drop target, in particular, for files from Windows Explorer.
The drag/drop implementation is pretty standard and based on two data members derived from COleDataSource and COleDropTarget for drop source and drop target respectively. The COleDropTarget-derived member is registered with respective window in the window's OnCreate method. It also overrides OnDragEnter, OnDragOver and OnDrop methods in a similar way. Namely, the system-supplied COleDataObject parameter is asked for specific format (in particular, CF_HDROP), and in the case of positive answer, the data (e.g., file path) is extracted from the clipboard. The code looks like the following:
static FORMATETC g_FileFmt = {CF_HDROP, 0, DVASPECT_CONTENT, 0, TYMED_HGLOBAL};
....
// Inside OnDragEnter, OnDragOver or OnDrop method
STGMEDIUM stgmedium = {0,0,0};
if (pDataObject->IsDataAvailable(g_FileFmt.cfFormat))
{
HRESULT hr = pDataObject->GetData(g_FileFmt.cfFormat, &stgmedium);
HDROP hdrop = (HDROP)GlobalLock(stgmedium.hGlobal);
if (hdrop != 0)
{
int FilesCount = DragQueryFile(hdrop, (UINT)-1, 0, 0);
if (FilesCount != 0)
{
TCHAR FileName[_MAX_PATH];
DragQueryFile(hdrop, 0, FileName, _MAX_PATH);
// Check file extension and store the file name for farther use.
}
GlobalUnlock(hdrop);
}
}
The drop source implementation is also straightforward and looks like the following:
void CDmDocListCtrl::OnBeginDrag(NMHDR* pNMHDR, LRESULT* pResult)
{
NM_LISTVIEW* pNMListView = (NM_LISTVIEW*)pNMHDR;
if (pNMListView->iItem != -1 && m_pOleDataSource && prv_BeginDrag())
{
DROPEFFECT DE = m_pOleDataSource->DoDragDrop(
DROPEFFECT_COPY | DROPEFFECT_MOVE | DROPEFFECT_LINK, 0);
}
*pResult = 0;
}
where prv_BeginDrag() function collects dragged data, packs it and puts on the clipboard by calling SetData method from the m_pOleDataSource object's IDataObject interface.
The all this stuff worked perfectly until it was decided to make the whole application registration-free. It took me three months to force the application run isolated (without registration of COM components) by embedding manifests, launching out-of-proc COM servers on demand and altering CLSID of some classes in order to separate instances of the same server launched from different folders. At last it begins to work - but without drag/drop functionality, despite it wasn't even touched by my changes.
On the drop target side, when I drag file from Windows Explorer, depicted above call to COleDataObject::IsDataAvailable returns false, although before my changes returned true. At the same time, if I add a single line of code "DragAcceptFiles();" to the main window's OnCreate method, drag/drop begins working via the standard CFrameWnd's WM_DROPFILE message handler.
On the drop source side, the dragged data are successfully packed and placed on the clipboard, but COleDataSource::DoDragDrop method fails, because a call to ::DoDragDrop API inside MFC implementation returns REGDB_E_CLASSNOTREG "Class not registered" result.
It means, that COM activation changes somehow influence drag/drop behavior. How?
P.S. 1) The EXE, to which I drag files from Windows Explorer, has in its project properties "UAC Execution Level = asInvoker". As far as I understand, it tells that the EXE will run at the same UAC level as Windows Explorer when launched by double-click on the file.
2) Quite surprisingly, although drag/drop stopped working with symptoms described above, Copy/Paste continues work well, despite the both technologies have similar implementation.
3) I believe, that if find out when ::DoDragDrop API returns "Class not registered" error, and which class it is looking for, it would be possible to solve the problem.
Thanks for help,
Ilia.
Following to MartinBa advice, I solved the problem with the help of Process Monitor. The Process Monitor showed me that while I drag an item in the ActiveX control (mentioned in the question), the system unsuccessfully tries get access to a class ID in the Registry. Looking for that ID, I found that it is really not class ID, but IDataObject interface ID. It was referenced in one of my manifest files.
The most of manifests I have written by hand, but a few, especially at the beginning of the project having no experience in the area, I generated automatically by Visual Studio from existing type library. In one of them Studio included the comInterfaceExternalProxyStub statement for a couple of system interfaces, in which proxyStubClsid32 element was (erroneously) equal to the interface ID.
I'm still not sure whether those system interfaces should present in the manifest; for example, the IDataObject is only mentioned as a method's parameter in one of IDL definitions. Anyway, I corrected only the proxyStubClsid32 value, and the problem disappeared...
The moral of this very painful for me story is to always check output of automatic tools...
Update: Answer: Two normal lines of code required. Thanks Noseratio!
I banged my head on the keyboard for more hours than I would have cared to trying to simulate IEs Ctrl+N behavior in my hosted Browser control app. Unfortunately, due to complications which I've abstracted out of my code examples below, I can't just let IE do Ctlr+N itself. So I have to do it manually.
Keep in mind that I am running a hosted browser. So typically, opening links in new windows will actuall open it within a new "tab" within my application (it's not really a tab, but another window... but appearance-wise it's a tab). However, Ctrl+N is different -- here, it is expected a fully-fledged IE window will launch when pressed.
I think my problem is that of framing the questions -- admittedly I am new to WebBrowser control and I find it to be a lot of yucky. Regardless, I've scoured the Internet for the past day and couldn't come up with an elegant solution.
Basically, the ideal solution would be to call a "NewWindow" function within WebBrowser control or its affiliate libraries; however, all I was able to find where the *On*NewWindow methods, which were event handlers, not event signallers. Which I understand that most of the time, the user will be creating the events... but what about programmatic simulation?
I tried looking into an SENDMESSAGE approach where I could use the IDs that the OnNewWindow events use... that ended up in nothing than crashes. Perhaps I could go back to get it work, but I'd like confirmation is that approach is even worth my time.
The next approach, which should have been the most elegeant, but sadly didn't pan out, was like the following:
Navigate2(GetLocationURL().GetBuffer(), BrowserNavConstants::navOpenInNewWindow);
It would have worked marvelously if it weren't for the fact that the new window would open in the background, blinking in the taskbar. needing clicking to bring it to the front.
I tried to get around the limitation in a myriad of ways, including getting the dispatcher of the current context, then calling OnNewWindow2 with that IDispatch object. Then I would invoke QueryInterface on the dispatch object for an IWebBrowser control. The webBrowser control (presumably under the control of the new window) could then navigate to the page of the original context. However... this too was a pretty messy solution and in the end would cause crashes.
Finally, I resorted to manually invoking JavaScript to get the desired behavior. Really?? Was there really no more elegant a solution to my problem than the below mess of code?
if ((pMsg->wParam == 'N') && (GetKeyState(VK_CONTROL) & 0x8000) && !(GetKeyState(VK_SHIFT) & 0x8000) && !(GetKeyState(VK_MENU) & 0x8000))
{
LPDISPATCH pDisp = CHtmlView::GetHtmlDocument();
IHTMLDocument2 *pDoc;
if (SUCCEEDED(pDisp->QueryInterface(IID_IHTMLDocument2, (void **)&pDoc)))
{
IHTMLWindow2* pWnd;
pDoc->get_parentWindow(&pWnd);
BSTR bStrLang = ::SysAllocString(L"JavaScript");
CString sCode(L"window.open(\"");
sCode.Append(GetLocationURL().GetBuffer());
sCode.Append(L"\");");
BSTR bStrCode = sCode.AllocSysString();
COleVariant retVal;
pWnd->execScript(bStrCode, bStrLang, retVal);
::SysFreeString(bStrLang);
::SysFreeString(bStrCode);
pDoc->Release();
}
pDisp->Release();
I find it hard to believe that I must resort to such hackery as this to get something as simple as opening a new window when the user presses Ctrl+N.
Please stackoverflow, please point out the clearly obvious thing I overlooked.
Ctrl-N in IE starts a new window on the same session. In your case, window.open or webBrowser.Navigate2 will create a window on a new session, because it will be run by iexplore.exe process which is separate from your app. The session is shared per-process, this is how the underlying UrlMon library works. So you'll loose all cookies and authentication cache for the new window. On the other hand, when you create a new window which hosts WebBrowser control within your own app process, you'll keep the session.
If such behavior is OK for your needs, try first your initial Navigate2 approach, precededing it with AllowSetForegroundWindow(ASFW_ANY) call. If the new window still doesn't receive the focus correctly, you can try creating an instance of InternetExplorer.Application out-of-proc COM object, and use the same IWebBrowser2 interface to automate it. Below is a simple C# app which works OK for me, the new window is correctly brought to the foreground, no focus issues. It should not be a problem to do the same with MFC.
using System;
using System.Runtime.InteropServices;
using System.Windows.Forms;
namespace IeApp
{
public partial class MainForm : Form
{
// get the underlying WebBrowser ActiveX object;
// this code depends on SHDocVw.dll COM interop assembly,
// generate SHDocVw.dll: "tlbimp.exe ieframe.dll",
// and add as a reference to the project
public MainForm()
{
InitializeComponent();
}
private void NewWindow_Click(object sender, EventArgs e)
{
AllowSetForegroundWindow(ASFW_ANY);
// could do: var ie = new SHDocVw.InternetExplorer()
var ie = (SHDocVw.InternetExplorer)Activator.CreateInstance(Type.GetTypeFromProgID("InternetExplorer.Application"));
ie.Visible = true;
ie.Navigate("http://www.example.com");
}
const int ASFW_ANY = -1;
[DllImport("user32.dll")]
static extern bool AllowSetForegroundWindow(int dwProcessId);
}
}
I would like to render video in ActiveX control (not in pop-up DirectShow window). I have:
IID_IVMRWindowlessControl
IID_IVMRFilterConfig9
CLSID_VideoMixingRenderer9
I would like to set WindowLess mode, but I don't know how to get HWND of..., exactly, of what? IEFrame, HTML element?
hr = pWc->SetVideoClippingWindow(???);
Anyone with some hint?
Regards.
First of all, add this to the constructor of your ActiveX control:
// this seemingly innocent line is _extremely_ important.
// This causes the window for the control to be created
// otherwise, you won't get an hWnd to render to!
m_bWindowOnly = true;
Your ActiveX control will have a member variable called m_hWnd that you'll be able to use as a render target. without the m_bWindowOnly variable set true, the ActiveX control won't create its own window.
Finally, pick your renderer (VMR9 for example)
CRect rcClient;
CComPtr<IBaseFilter> spRenderer;
CComPtr<IVMRWindowlessControl9> spWindowless;
// Get the client window size
::GetClientRect(m_hWnd, rcClient);
// Get the renderer filter
spRenderer.Attach( m_pGraph->GetVideoRenderer() );
if( ! spRenderer )
return E_POINTER;
spWindowless = spRenderer;
if( spWindowless )
{
spWindowless->SetVideoClippingWindow( m_hWnd );
spWindowless->SetVideoPosition(NULL, rcClient);
spWindowless.Release();
}
spRenderer.Detach();
Please note that my graph object is a custom object and that GetVideoRenderer() is one of my own functions - it returns an IBaseFilter*.
It took me ages to find this one out. ATL is poorly documented, which is a shame, because it's an excellent technology. Anyways, hope this helps!
freefallr's info is extremely helpful, but I don't think it answers your question completely. The trick with windowless activex controls is that you don't get a window. When you draw you'll just basically get a device context and you have to respond to call from the browser and only draw when it tells you to.
The interfaces required are here: http://msdn.microsoft.com/en-us/library/ms682300%28v=VS.85%29.aspx
more info here: http://msdn.microsoft.com/en-us/library/aa751970%28VS.85%29.aspx#OC96_and_Windowless_
We've been meaning to add support for this in FireBreath (http://firebreath.org) for awhile; we have support for it in all npapi browsers, but looks like we don't (yet) support IE. If you find more details, post a summary here =]
I have some code which shows a simple dialog box and handles user action (written using plain WinAPI).
// Display dialog and handle user action
LRESULT choice = DialogBoxParam(NULL, MAKEINTRESOURCE(AP_IDD_DIALOG), NULL, (DLGPROC)DialogCallback, NULL);
Is there any way to hardcode the resource file dialog.rc, which is used to build the dialog ?(I would like to get rid of .rc files and I'm pretty sure there is a way, yet I don't know what it is :)
Edit
Also, does someone have any ideas on converting existing .rc files into hardcoded resources? Is this possible?
*.rc (resource) files are source code, they are compiled with the resource compiler and linked into your object (.exe/.dll)
You don't need to ship the resource file or have it present with your app to run it.
If you want to move to programmatically defined windows rather than templates then you might want to be looking at QT/wxWidgets. But thats a fair chunk of overhead for 1 dialog!
I'm surprised I couldn't find an existing app to do this sort of thing, enough hits on google with people trying to do this.
Ok, so the DLGTEMPLATE is a variable length blob of data, normally you let the dialog function pull it from the resource bundle for you, but instead you want to store it in your program.
You need to change your static lib to have a new function to decode some 'blob' back into the dlgtemplate, and you need to generate the blob. (or add the blob in your code without decoding which I don't want to think about right now)
The following code will give you the DLGTemplate data you need to imbed in your app. (cut from larger project)
HGLOBAL LoadResourceImpl(wchar_t *resource, wchar_t *type)
{
HRSRC handle = FindResource(hInstance, resource,type);
if (handle)
{
HGLOBAL hResource = LoadResource(hInstance, handle);
if (hResource)
return LockResource(hResource);
}
return 0;
}
DLGTEMPLATE * LoadDialog(wchar_t *resource)
{
return (DLGTEMPLATE *) LoadResourceImpl(resource,RT_DIALOG);
}
DLGTEMPLATE * LoadDialog(int resource)
{
return (DLGTEMPLATE *) LoadResourceImpl(MAKEINTRESOURCE(resource),RT_DIALOG);
}
Make an app that includes your resource - use the appropriate LoadDialog to get the data.
Now "write out" that blob in a format to include in your app -
step 1 - find out how much data there is by traversing the structure to find the total size including all the controls (control count is in DLGTEMPLATE::cdit)
step 2 - convert the data to something you can compile into your code - like HEX
Add to your static library a new 'HEX' to DLGTEMPLATE method and the hex string you made using the other app.
Can we hard code the .res file into the program?
the resource compiler converts .rc into .res
use a hex dump tool (eg. winhex) to translate the .res into bytes array
(represented in C source code).
add the source code file in the project and compile in the executable.
locate the dialog resource position from the array and use DialogBoxIndirect.
DialogBoxParamIndirect can be used instead. It takes as a parameter the dialog template. Raymond Chen's blog has an example of building a dialog box at runtime rather than from a resource using the DialogBox*Indirect API's.
Per MSDN, dialog box resources are basically composed of the DLGTEMPLATE and DLGITEMTEMPLATE structures. So you should be able to use the resource API's (FindResource, LoadResource, and LockResource) to get at the underlying bits of an existing dialog resource, and embed that within your code.
Note that this is a lot more painful than using the .rc file. It's much more difficult to make changes to your layout, and it's also much less localizable, since localization would now require a code change to update the template in code.
If it's a simple dialog, why use the DLGTEMPLATE at all?
Nothing stops you from simply doing ::CreateWindow'ing those controls directly. If it's a simple dialog with 2-3 buttons and a couple text fields, simply call ::CreateWindow, passing in the window class of whatever common control you're using.
This is essentially what the DialogXxxxx functions do anyway. DLGTEMPLATE is a convenience for declaratively laying out your forms, and having the boilerplate make the appropriate CreateWindow calls, etc.