Bug 13315 - Cannot hide main window
Summary: Cannot hide main window
Status: NEW
Alias: None
Product: Class Libraries
Classification: Mono
Component: Windows.Forms ()
Version: unspecified
Hardware: Other Linux
: Lowest normal
Target Milestone: Community
Assignee: Bugzilla
URL:
Depends on:
Blocks:
 
Reported: 2013-07-17 22:18 UTC by Benn Snyder
Modified: 2017-09-01 11:55 UTC (History)
1 user (show)

Tags: mono-community
Is this bug a regression?: ---
Last known good build:

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Related Links:
Status:
NEW

Description Benn Snyder 2013-07-17 22:18:30 UTC
Description of Problem: I am developing an application that exists solely as a notification icon; I therefore wish to hide the main window.  The window disappears as expected with Visual Studio 2010, but not with Mono 3.0.7.


Steps to reproduce the problem:
1. Extend System.Windows.Forms.Form
2. Override OnLoad like so:

protected override void OnLoad(EventArgs e)
{
    Visible = false;
    ShowInTaskbar = false;
    base.OnLoad(e);
}

Actual Results:
An empty window appears

Expected Results:
100% less window

How often does this happen? 
Always

Additional Information:
I am running KDE4 on Gentoo Linux amd64.

$ mono bin/Debug/Espresso.exe
KDE colorscheme read failure, using built-in colorscheme

$ mono --version
Mono JIT compiler version 3.0.7 ((no/514fcd7 Thu Jul 11 22:21:49 EDT 2013)
Copyright (C) 2002-2012 Novell, Inc, Xamarin Inc and Contributors. www.mono-project.com
        TLS:           __thread
        SIGSEGV:       altstack
        Notifications: epoll
        Architecture:  amd64
        Disabled:      none
        Misc:          softdebug 
        LLVM:          supported, not enabled.
        GC:            Included Boehm (with typed GC and Parallel Mark)

$ emerge --info mono
Portage 2.1.12.2 (default/linux/amd64/13.0/desktop/kde, gcc-4.6.3, glibc-2.15-r3, 3.8.13-gentoo x86_64)
=================================================================
                         System Settings
=================================================================
System uname: Linux-3.8.13-gentoo-x86_64-AMD_FX-tm-6100_Six-Core_Processor-with-gentoo-2.2
KiB Mem:    32913500 total,  24164928 free
KiB Swap:          0 total,         0 free
Timestamp of tree: Mon, 15 Jul 2013 02:15:01 +0000
ld GNU ld (GNU Binutils) 2.23.1
app-shells/bash:          4.2_p45
dev-lang/python:          2.7.5, 3.2.5-r1
dev-util/cmake:           2.8.10.2-r2
dev-util/pkgconfig:       0.28
sys-apps/baselayout:      2.2
sys-apps/openrc:          0.11.8
sys-apps/sandbox:         2.6-r1
sys-devel/autoconf:       2.13, 2.69
sys-devel/automake:       1.10.3, 1.11.6, 1.12.6
sys-devel/binutils:       2.23.1
sys-devel/gcc:            4.6.3
sys-devel/gcc-config:     1.7.3
sys-devel/libtool:        2.4-r1
sys-devel/make:           3.82-r4
sys-kernel/linux-headers: 3.7 (virtual/os-headers)
sys-libs/glibc:           2.15-r3
Repositories: gentoo gamerlay x-portage
Installed sets: @util
ACCEPT_KEYWORDS="amd64"
ACCEPT_LICENSE="* -@EULA"
CBUILD="x86_64-pc-linux-gnu"                                                                                                                                                    
CFLAGS="-march=native -O2 -pipe -floop-strip-mine -floop-block -ftree-loop-distribution"                                                                                        
CHOST="x86_64-pc-linux-gnu"                                                                                                                                                     
CONFIG_PROTECT="/etc /usr/share/config /usr/share/gnupg/qualified.txt /usr/share/themes/oxygen-gtk/gtk-2.0"                                                                     
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo"                
CXXFLAGS="-march=native -O2 -pipe -floop-strip-mine -floop-block -ftree-loop-distribution"                                                                                      
DISTDIR="/usr/portage/distfiles"                                                                                                                                                
EMERGE_DEFAULT_OPTS="-j4 --load-average=4 --keep-going"                                                                                                                         
FCFLAGS="-O2 -pipe"                                                                                                                                                             
FEATURES="assume-digests binpkg-logs config-protect-if-modified distlocks ebuild-locks fixlafiles merge-sync news parallel-fetch preserve-libs protect-owned sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync"                                                                                 
FFLAGS="-O2 -pipe"                                                                                                                                                              
GENTOO_MIRRORS="http://distfiles.gentoo.org"                                                                                                                                    
LDFLAGS="-Wl,-O1 -Wl,--as-needed"                                                                                                                                               
MAKEOPTS="-j8 -l8"
PKGDIR="/usr/portage/packages"
PORTAGE_CONFIGROOT="/"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY="/var/lib/layman/gamerlay /usr/local/portage"
SYNC="rsync://rsync.us.gentoo.org/gentoo-portage"
USE="X aac acl acpi alsa amd64 avx berkdb bluetooth branding bzip2 cairo cdr cli consolekit cracklib crypt cxx dbus declarative dri dts dvdr emboss encode exif fam firefox flac fortran gdbm gif gpm iconv ipv6 jpeg kde kipi lcms libnotify mad mmx mmxext mng modules mp3 mp4 mpeg mudflap multilib ncurses networkmanager nls nptl nvidia ogg opengl openmp pam pango pcre pdf phonon plasma png policykit ppds pulseaudio qt3support qt4 readline sdl semantic-desktop session smp spell sse sse2 sse3 sse4_1 sse4_2 sse4a ssl ssse3 startup-notification svg svm tcpd tiff truetype udev udisks unicode upower usb vdpau vorbis x264 xcb xcomposite xinerama xml xv xvid zlib" ABI_X86="64" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" APACHE2_MODULES="authn_core authz_core socache_shmcb unixd actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" CALLIGRA_FEATURES="kexi words flow plan sheets stage tables krita karbon braindump author" CAMERAS="ptp2" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf superstar2 timing tsip tripmate tnt ubx" GRUB_PLATFORMS="pc" INPUT_DEVICES="evdev" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LINGUAS="en_US" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-4" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7 python3_2" RUBY_TARGETS="ruby19 ruby18" USERLAND="GNU" VIDEO_CARDS="nvidia" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq steal rawnat logmark ipmark dhcpmac delude chaos account"
Unset:  CPPFLAGS, CTARGET, INSTALL_MASK, LANG, LC_ALL, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON

=================================================================
                        Package Settings
=================================================================

dev-lang/mono-3.0.7 was built with the following:
USE="-doc -minimal -pax_kernel -xen"
CFLAGS="-march=native -O2 -pipe -fno-strict-aliasing"
CXXFLAGS="-march=native -O2 -pipe -fno-strict-aliasing"