Qt Designer forms are processed at run-time to produce dynamically-generated user interfaces. In order to generate a form at run-time, a resource file containing a UI file is needed. Applications that use the form handling
classes need to be configured to be built against the Qt UI Tools module. This is done by including the following declaration in a
qmake project file to ensure that the application is compiled and linked
QT += uitools
A form loader object, provided by the QUiLoader class, is used to construct the user interface. This user interface can be retrieved from any QIODevice. For example, a QFile object can be used to obtain a form stored in a project's resources. The QUiLoader::load() function takes the user interface description contained in the file and constructs the form widget.
To include the definitions of the module's classes, use the following directive:
Qt UI Tools is available under commercial licenses from The Qt Company. Since Qt 5.11, it is also available under the BSD 3-Clause "New" or "Revised" License:
Copyright (C) 2018 The Qt Company Ltd. Commercial License Usage Licensees holding valid commercial Qt licenses may use this file in accordance with the commercial license agreement provided with the Software or, alternatively, in accordance with the terms contained in a written agreement between you and The Qt Company. For licensing terms and conditions see https://www.qt.io/terms-conditions. For further information use the contact form at https://www.qt.io/contact-us. BSD License Usage Alternatively, you may use this file under the terms of the BSD license as follows: "Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. * Neither the name of The Qt Company Ltd nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
These are links to the API reference materials.
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