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PROGRAM:

NAME


kgendesignerplugin - Generates widget plugins for Qt(TM) Designer.

SYNOPSIS


kgendesignerplugin [OPTIONS...] file

DESCRIPTION


The custom widget plugins for Qt(TM) Designer usually follow a standard pattern, and the
classes provided by the plugin mostly provide static information, along with function to
create an instance that is normally just a simple constructor call. kgendesignerplugin
allows developers of libraries that provide new widgets to create such a plugin without
creating all the associated boilerplate code, by providing a simple ini-style description
file.

kgendesignerplugin chooses sensible defaults for most settings, so minimal configuration
is usually necessary.

OPTIONS


-o file
The name for the generated C++ file. If not given, stdout will be used.

-n plugin-name
Provided for compatibility. The default value for the PluginName option in the input
file.

-g group
Provided for compatibility. The default value for the DefaultGroup option in the input
file.

--author
Show author information.

--license
Show license information.

-h, --help
Show a brief help text.

-v , --version
Show version information.

FILE FORMAT


The input file is an ini-style configuration file (specifically, it is in the format
supported by the KConfig framework) that describes a set of widgets. It contains a
[Global] section, providing general information about the plugin, and a section for each
widget that should be included in the plugin.

The [Global] section can have the following entries:

DefaultGroup
The default value for the Group entry in the class sections (default: "Custom", unless
the -g option is given).

Includes
A (comma-separated) list of required includes (default: empty). Note that the header
files for the widgets specified later in file should not be listed here; instead, this
is for special headers for the plugin's own use, like those for classes providing
previews.

PluginName
The name of the main C++ class in the plugin (default: "WidgetsPlugin", unless the -n
option is given).

Each class should have its own [ClassName] section, which can include the following
entries:

CodeTemplate
The value returned by the codeTemplate() function of the plugin, which is marked for
"future use" by Qt(TM) Designer (default: empty).

ConstructorArgs
The arguments to pass to the constructor of the class given by ImplClass; these must
be surrounded by parentheses (default: "(parent)"). The only variable guaranteed to be
available is parent, which is the parent QWidget passed by Qt(TM) Designer.

This entry is ignored if CreateWidget is set.

CreateWidget
The code necessary to create an instance of the widget (default: uses new to create an
instance of the class given by the ImplClass entry, passing the arguments specified by
ConstructorArgs). See the notes for ImplClass and ConstructorArgs.

DomXML
An XML UI description of the widget (default: the default provided by the Qt(TM)
Designer plugin headers).

Group
The group to display the widget under in Qt(TM) Designer (default: the value of the
DefaultGroup entry in the [Global] section).

IconName
The image file or standard icon name to use as the icon for this widget in the Qt(TM)
Designer widget list (default: a PNG file named with the section name, with any double
colons removed, in the "pics" directory of a compiled-in resource file; for example,
:/pics/Foo.png in the section [Foo], or :/pics/FooBar.png in the section [Foo::Bar]).

ImplClass
The class that should be used to create an instance of the widget for the use of
Qt(TM) Designer (default: the section name). Note that this does not actually have to
be the class that would be created for an end application: that is determined by the
DomXML.

This entry is ignored if CreateWidget is set.

IncludeFile
The header that needs to be included to use this widget (default: the lowercase
version of the section name, with any colons removed and ".h" appended; for example,
foo.h in the section [Foo], or foobar.h in the section [Foo::Bar]).

IsContainer
Whether this widget can contain other widgets (default: false).

ToolTip
The tooltip to display when hovering over the widget in the widget list of Qt(TM)
Designer (default: the section name, with " Widget" appended; for example, Foo Widget
in the section [Foo]).

WhatsThis
The What's This text associated with the widget in Qt(TM) Designer (default: the
section name, with " Widget" appended; for example, Foo Widget in the section [Foo]).

EXAMPLES


The simplest description file might look like

[Foo]
ToolTip=Displays foos
[Bar]
ToolTip=Bar editor

Note that each class must have at least one key set (ToolTip was used in this example),
otherwise it will be ignored.

Usually, you want to change at least the user-visible text, which means the ToolTip,
WhatsThis and Group entries. Additionally, setting the plugin name can be a good idea to
prevent possible symbol clashes and not confuse debuggers (both the debugger application
and the person doing the debugging):

[Global]
PluginName=FooWidgets
DefaultGroup=Display

[Foo]
ToolTip=Displays bears
WhatsThis=An image widget that displays dancing bears

[Bar]
ToolTip=Bar editor
WhatsThis=An editor interface for bars for bears
Group=Editing

More complex files may be necessary if you have namespaced classes or extra options that
need supplying to constructors, for example:

[Global]
PluginName=FooWidgets
DefaultGroup=Foo

[Foo::Bar]
ToolTip=Displays bars
WhatsThis=A widget that displays bars in a particular way
IncludeFile=foo/bar.h
IconName=:/previews/bar.png

[Foo::Baz]
IncludeFile=foo/baz.h
ConstructorArgs=(Foo::Baz::SomeOption, parent)
Group=Foo (Special)
IsContainer=true
IconName=:/previews/baz.png

Sometimes especially complex widgets might need a special "preview class" implementation
for use in Qt(TM) Designer; this might be a subclass of the real widget that just does
some extra setup, or it might be a completely different implementation.

[Global]
Includes=foopreviews.h

[FancyWidget]
ImplClass=FancyWidgetPreview

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