How to set/change top-level window for popup

[lolovo]

Hello!

Is it possible to set/change top-level window (i.e. using my delegate class) for popup before it will created? Is there a convenient way to realize it? I found only OnBeforePopup and I can try to create my own top-level window here and interrupt initial popup creation, but I don't know how cef will react for this trick...

Thanks in advance!

[magreenblatt]

It is possible using OnBeforePopup. See cefclient for an example.

[hkurra]

On Windows platform, We are using onBeforePopup() to set our own main application window as the owner window of pop up
First get the "chromeWindow/HostWindow" from the browser instance as follow (this browser instance represent the browser from which window.open() request initiated)

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HWND chromeTabWindow = browser->GetHost()->GetWindowHandle();

In our case, we are also setting one parent window in which chrome window gets rendered so we also need to get its instance too but in your case, it could be your main application window.

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HWND myParentWindow = GetParent(chromeTabWindow);

Now, get the Main Application window as follow

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HWND myOwnerWindow = ::GetWindow(myParentWindow, GW_OWNER);

Now, pass owner window instance in SetAsPopup() method

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windowInfo.SetAsPopup(myOwnerWindow, target_frame_name);

Then we have some window position logic you can ignore it or change it as per your needs

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RECT rect = { 0,0,600,600 };
   if (GetWindowRect(myOwnerWindow, &rect)) {
      windowInfo.x = abs(abs(rect.right - rect.left) - (popupFeatures.width)) / 2 ;
      windowInfo.y = abs(abs(rect.bottom - rect.top) - (popupFeatures.height)) / 2;
   }
   if (popupFeatures.height > 0) {
      windowInfo.height = popupFeatures.height;
   }
   if (popupFeatures.width > 0) {
      windowInfo.width = popupFeatures.width;
   }
   if (popupFeatures.x > 0) {
      windowInfo.x = popupFeatures.x;
   }
   if (popupFeatures.y > 0) {
      windowInfo.y = popupFeatures.y;
   }

Now you need to disable the Main application window to make your pop up dialog as modal window(i.e no other window should get focus)

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EnableWindow(myOwnerWindow, FALSE);

Now, In "OnBeforeClose()" you need to enable your main application window if pop gets closed

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CefWindowHandle chromeTabWindow = browser->GetHost()->GetWindowHandle();
   CefWindowHandle ownerWinHandle = GetParentWindow(chromeTabWindow);

   if (browser->IsPopup()) {
      EnableWindow(ownerWinHandle, TRUE);
      SetForegroundWindow(ownerWinHandle);
          }

[lolovo]

Thank you for your replies hkurra & Marshall !