**NAME**
Internet Explorer as a Tk widget.
**DESCRIPTION**
[DDG] 2020-03-20: This is a WIP to wrap the Internet Explorer on Windows using the [twapi] package as a Tk widget. So it can be used to display websites inside Tk applications using the [COM] interface of [Internet Explorer]. The code below is based on the wiki page [Reparenting native applications on Windows].
**TODO**
I was not able to remove the thick title bar. I wsorkarounlved the issue by moving the window 25px on top, so that the title bar is almost not visible. May be some guys understanding the https://docs.microsoft.com/en-us/windows/win32/winmsg/window-styles%|%Windows style documentation%|% can fix this for me. I tried a few things but it did not work. Any suggestions? I found a workaround with Windows styles. The control has a property TheaterMode which gets rid of the title bar.
======
package require snit
package require Tk
package require twapi
namespace eval dgwin { }
snit::widget dgwin::ie {
option -url https://wiki.tcl-lang.org
variable ie
variable ie_events
constructor {args} {
$self configurelist $args
set ie [ twapi::comobj InternetExplorer.Application ]
set w [ $ie HWND ]
set wIE [ list $w HWND ]
#https://docs.microsoft.com/en-us/windows/win32/winmsg/window-styles
set WS_CHILD 0x40000000
set WS_BORDER 0x00800000
set WS_DLGFRAME 0x00400000
# did not work ; I like to have only a thin border around
# and not a thick title frame border
# any suggestion?
set szStyleLst [ twapi::get_window_style $wIE ]
set szStyle [ lindex $szStyleLst 0 ]
set szExStyle [ lindex $szStyleLst 1 ]
#puts "szStyle: $szStyle szExStyle: $szExStyle"
set szStyle [ expr {$szStyle | $WS_CHILD} ]
#puts "szStyle: $szStyle szExStyle: $szExStyle"
twapi::set_window_style $wIE $szStyle $szExStyle
#twapi::set_window_style $wIE $szStyle [expr $WS_BORDER] ;# did not change anything
twapi::configure_window_titlebar $wIE -visible 0
$ie Visible 0
set szUrl $options(-url)
$ie Navigate $szUrl
twapi::resize_window $wIE 400 400
set frame [frame $win.tf -container true]
set wParent [ twapi::tkpath_to_hwnd $frame ]
twapi::SetParent $wIE $wParent
$ie Resizable 1
$ie MenuBar 0
$ie AddressBar 0
$ie RegisterAsBrowser 1
$ie Visible 1
# fix for title frame
$ie TheaterMode 1
set ie_events [ $ie -bind [mymethod ie_bind_events ]]
#twapi::set_window_text $wIE "IE Child"
bind $frame <Configure> [mymethod moveWindow $wIE %w %h]
#bind $frame <Destroy> [list onDestroy]
#moveWindow $wIE [winfo width .] [winfo height .]
$frame configure -width 400 -height 400
pack $frame -side top -fill both -expand true
update
$self moveWindow $wIE [winfo width $frame] [winfo height $frame]
}
onconfigure -url {value} {
set options(-url) $value
$ie Navigate $value
}
method ie_bind_events {args} {
puts "events: $args"
set nIndex 0
set nLength [ llength $args ]
while { $nIndex < $nLength } {
set arg [ lindex $args $nIndex ]
if { [ string compare $arg "OnQuit" ] == 0 } {
$ie -unbind $ie_events
$ie Quit
$ie -destroy
set ie_forever 1
}
if {$arg eq "NavigateComplete2"} {
set url [lindex $args [expr {$nIndex + 2}]]
# todo remove this title setting
wm title . $url
set options(-url) $url
}
incr nIndex
}
}
method moveWindow {wId w h} {
# fix to hide the title bar, not required anymore due to TheaterMode setting
#incr h 25
twapi::resize_window $wId $w $h
twapi::move_window $wId 0 0
}
destructor {
$ie -unbind $ie_events
# calling quit here gives an error message
#$ie Quit
$ie -destroy
}
}
======
**EXAMPLE**
Below is an example on how to use the widget:
======
wm title . "IE Demo on Windows"
set ie [dgwin::ie .ie]
pack $ie -side left -fill both -expand true
$ie configure -url https://core.tcl.tk
======
Below an image of IE inside Tk:
[dgwin-ie-image]
**DISCUSSION**
Please discuss here ...
<<categories>>Windows | COM | Snit | Snit Widgets