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奇趣公司比较新的qt/emd版本

Qt uses a layout-based approach to widget management. Widgets are arranged in
the optimal positions in windows based on simple layout rules, leading to a
consistent look and feel.

Custom layouts can be used to provide more control over the positions and
sizes of child widgets.


The example launcher provided with Qt can be used to explore each of the
examples in this directory.

Documentation for these examples can be found via the Tutorial and Examples
link in the main Qt documentation.


Finding the Qt Examples and Demos launcher
==========================================

On Windows:

The launcher can be accessed via the Windows Start menu. Select the menu
entry entitled "Qt Examples and Demos" entry in the submenu containing
the Qt tools.

On Mac OS X:

For the binary distribution, the qtdemo executable is installed in the
/Developer/Applications/Qt directory. For the source distribution, it is
installed alongside the other Qt tools on the path specified when Qt is
configured.

On Unix/Linux:

The qtdemo executable is installed alongside the other Qt tools on the path
specified when Qt is configured.

On all platforms:

The source code for the launcher can be found in the examples/tools/qtdemo
directory in the Qt package. This example is built at the same time as the
Qt libraries, tools, examples, and demonstrations.