Plug & Paint Extra Filters ExampleFiles:
The Extra Filters example is a plugin for the Plug & Paint example. It provides a set of filters in addition to those provided by the Basic Tools plugin. Since the approach is identical to Basic Tools, we won't review the code here. The only part of interest is the .pro file, since Extra Filters is a dynamic plugin (Basic Tools is linked statically into the Plug & Paint executable). Here's the project file for building the Extra Filters plugin: TEMPLATE = lib CONFIG += plugin INCLUDEPATH += ../.. HEADERS = extrafiltersplugin.h SOURCES = extrafiltersplugin.cpp TARGET = $$qtLibraryTarget(pnp_extrafilters) DESTDIR = ../../plugandpaint/plugins The .pro file differs from typical .pro files in many respects. First, it starts with a TEMPLATE entry specifying lib. (The default template is app.) It also adds plugin to the CONFIG variable. This is necessary on some platforms to avoid generating symbolic links with version numbers in the file name, which is appropriate for most dynamic libraries but not for plugins. The INCLUDEPATH variable sets the search paths for global headers (i.e., header files included using #include <...>). We add Qt's examples/tools directory (strictly speaking, examples/tools/plugandpaintplugins/basictools/../..) to the list, so that we can include <plugandpaint/interfaces.h>. The TARGET variable specifies which name we want to give the target library. We use pnp_ as the prefix to show that the plugin is designed to work with Plug & Paint. On Unix, lib is also prepended to that name. On all platforms, a platform-specific suffix is appended (e.g., .dll on Windows, .so on Linux). The DESTDIR variable specifies where we want to install the plugin. We put it in Plug & Paint's plugins subdirectory, since that's where the application looks for dynamic plugins. The CONFIG() code at the end is necessary for this example because the example is part of the Qt distribution and Qt can be configured to be built simultaneously in debug and in release modes. You don't need to for your own plugins. © 2008-2011 Nokia Corporation and/or its subsidiaries. Nokia, Qt and their respective logos are trademarks of Nokia Corporation in Finland and/or other countries worldwide. All other trademarks are property of their respective owners. Privacy Policy Licensees holding valid Qt Commercial licenses may use this document in accordance with the Qt Commercial License Agreement provided with the Software or, alternatively, in accordance with the terms contained in a written agreement between you and Nokia. Alternatively, this document may be used under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. |