Every time that a new tab or popup needs to be created the TChromium.OnBeforePopup event is triggered.
That event has a popupFeatures parameter with information about the requested popup window.
The windowInfo parameter also has information about the control dimensions used by CEF3 as a parent to some new child "windows" (using the Windows API term) where the browser contents will be shown.
The code comments for TChromium.OnBeforePopup are these :
Code: Select all
///
// Called on the UI thread before a new popup browser is created. The
// |browser| and |frame| values represent the source of the popup request. The
// |target_url| and |target_frame_name| values indicate where the popup
// browser should navigate and may be empty if not specified with the request.
// The |target_disposition| value indicates where the user intended to open
// the popup (e.g. current tab, new tab, etc). The |user_gesture| value will
// be true if the popup was opened via explicit user gesture (e.g. clicking a
// link) or false if the popup opened automatically (e.g. via the
// DomContentLoaded event). The |popupFeatures| structure contains additional
// information about the requested popup window. To allow creation of the
// popup browser optionally modify |windowInfo|, |client|, |settings| and
// |no_javascript_access| and return false. To cancel creation of the popup
// browser return true. The |client| and |settings| values will default to the
// source browser's values. If the |no_javascript_access| value is set to
// false the new browser will not be scriptable and may not be hosted in the
// same renderer process as the source browser. Any modifications to
// |windowInfo| will be ignored if the parent browser is wrapped in a
// CefBrowserView. Popup browser creation will be canceled if the parent
// browser is destroyed before the popup browser creation completes (indicated
// by a call to OnAfterCreated for the popup browser).
///If you just want to resize a popup window created automatically by CEF3, then you need to use the Windows API functions commented here :
https://stackoverflow.com/questions/692 ... indows-api