Hello wysota . This is my *.pro file:
INCLUDEPATH += .

# Input
HEADERS += filechooser.h plugin.h
SOURCES += filechooser.cpp plugin.cpp

TEMPLATE = lib
LANGUAGE = C++
TARGET = filechooser

DESTDIR = $(QTDIR)/plugins/designer

target.path=$(QTDIR)/plugins/designer

INSTALLS += target
CONFIG += qt warn_on release plugin
DBFILE = plugin.db
I don't know why ,as if my Qt designer can't see the "/usr/lib/qt3/plugins/designer/libfilechooser.so" plugin,can you tell me how can I do?