I would say first try to run this example http://qt-project.org/doc/qt-4.8/designer-customwidgetplugin.html and then compare with your implementation.
On Tue, Dec 3, 2013 at 12:24 PM, Graham Labdon < graham.lab...@avalonsciences.com> wrote: > So I added the export and includes QDesignerExportWidget to my class and > now it wont compile – > > > > Moc'ing MyLabel.h... > > 1> moc_MyLabel.cpp > > 1>Build\moc\moc_MyLabel.cpp(55): warning C4273: > 'MyLabel::qt_static_metacall' : inconsistent dll linkage > > 1> c:\sandbox\testplugin\widgets\build\moc\../../MyLabel.h(10) : > see previous definition of 'qt_static_metacall' > > 1>Build\moc\moc_MyLabel.cpp(62): warning C4273: 'staticMetaObject' : > inconsistent dll linkage > > 1> c:\sandbox\testplugin\widgets\build\moc\../../MyLabel.h(10) : > see previous definition of 'public: static QMetaObject const > MyLabel::staticMetaObject' > > 1>Build\moc\moc_MyLabel.cpp(62): error C2491: 'MyLabel::staticMetaObject' > : definition of dllimport static data member not allowed > > 1>Build\ > > …………….. > > > > I have no idea why > > *From:* Harish Surana [mailto:suran...@gmail.com] > *Sent:* 03 December 2013 11:13 > > *To:* Graham Labdon > *Cc:* interest@qt-project.org > *Subject:* Re: [Interest] using designer plugin in application > > > > If you look for QDESIGNER_WIDGET_EXPORT in the documentation. You will get: > > QDESIGNER_WIDGET_EXPORT > > This macro is used when defining custom widgets to ensure that they are > correctly exported from plugins for use with *Qt Designer*. > > On some platforms, the symbols required by *Qt Designer* to create new > widgets are removed from plugins by the build system, making them unusable. > Using this macro ensures that the symbols are retained on those platforms, > and has no side effects on other platforms. > > For example, the World Time Clock Plugin example exports a custom widget > class with the following declaration: > > > > class QDESIGNER_WIDGET_EXPORT WorldTimeClock : public QWidget > > { > > Q_OBJECT > > ... > > }; > > > > > > On Tue, Dec 3, 2013 at 12:00 PM, Graham Labdon < > graham.lab...@avalonsciences.com> wrote: > > Hi > > I have read this but cannot get it to work (I am using Qt5.1.1 with Visual > Studio > > I have a library called Widgets.dll that contains 1 class declared as > > #include <QLabel> > > #include "widgets_global.h" > > > > class WIDGETS_EXPORT MyLabel : public QLabel > > { > > Q_OBJECT > > > > public: > > MyLabel(QWidget *parent); > > ~MyLabel(); > > > > private: > > > > }; > > I have set up my plugin project so that it can see the header file for > MyLabel and can see the Widgets.lib > > The plugin project builds without error but is not visible in Designer > > Can anyone see the reason for this? > > > > Thanks > > > > *From:* Harish Surana [mailto:suran...@gmail.com] > *Sent:* 03 December 2013 10:20 > *To:* Graham Labdon > *Cc:* interest@qt-project.org > *Subject:* Re: [Interest] using designer plugin in application > > > > Yes it is technically possible to make the widgets accessible to Qt > Designer without linking *widgets dll* against *QtDesigner4.dll*. Some > possible approaches are described here: > http://qt-project.org/doc/qt-4.8/designer-creating-custom-widgets.html(see > the section "Splitting up the Plugin"). > > > > On Tue, Dec 3, 2013 at 10:31 AM, Graham Labdon < > graham.lab...@avalonsciences.com> wrote: > > Hi > > I have developed a number of Qt Designer plugins and can use them in my > applications. > > But obviously I need my apps to link against the plugin library which > means when I deploy the application I need to deploy the plugin library as > well. > > What I would like is for widget classes to be compiled into one library > that both the application and the designer plugin can use but I have been > unable to achieve this. > > Is this possible? > > > > > > > _______________________________________________ > Interest mailing list > Interest@qt-project.org > http://lists.qt-project.org/mailman/listinfo/interest > > > > >
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