NAME¶
UControl, UControlInteractor - base classes for menu and button interfaces that
work with ControlInfo objects
SYNOPSIS¶
#include <Unidraw/uctrl.h>
DESCRIPTION¶
UControl is an abstract class that augments InterViews' Control base class to
deal with Unidraw's ControlInfo objects, which define a keyboard equivalent
for the control. UControlInteractor is an abstract base class for interactors
that base their appearance on the information in a ControlInfo object.
UControl subclasses can use UControlInteractor subclasses to define their
appearance.
Unidraw-based applications needn't use UControls and
UControlInteractors to help define their look and feel if Unidraw's keyboard
equivalent mechanism is not needed.
UCONTROL PUBLIC OPERATIONS¶
- virtual void SetControlInfo(ControlInfo*)
- ControlInfo* GetControlInfo()
- Assign and retrieve the UControl's ControlInfo object.
UCONTROL PROTECTED OPERATIONS¶
- UControl(ControlInfo*)
- UControl(const char*, ControlInfo*)
- UControl provides protected constructors that let subclasses initialize
the ControlInfo object and optionally specify their instance name.
UCONTROLINTERACTOR PUBLIC OPERATIONS¶
- virtual void SetControlInfo(ControlInfo*)
- ControlInfo* GetControlInfo()
- Assign and retrieve the UControlInteractor's ControlInfo object.
- virtual void Highlight(boolean)
- The UControlInteractor's appearance is defined by a Graphic object, which
it builds from information in its ControlInfo object. By default,
UControlInteractor highlights itself by drawing this graphic with its
foreground and background colors reversed.
UCONTROLINTERACTOR PROTECTED OPERATIONS¶
- UControlInteractor(ControlInfo*)
- UControlInteractor()
- UControlInteractor defines two protected constructors. One takes the
ControlInfo object to use as an argument. This constructor also
initializes the UControlInteractor's _label protected member by
calling InitLabel (described below) with the ControlInfo object. The
parameterless constructor initializes _label to nil. Both
constructors initialize the UControlInteractor's _picture protected
member to point to an instance of a Picture object, which defines the
UControlInteractor's appearance.
- virtual void Invert()
- Invert reverses _picture's colors without drawing it.
- Graphic* InitLabel(ControlInfo*)
- Create a graphic from the information stored in a ControlInfo object that
defines the UControlInteractor's appearance. This operation creates a
GraphicView of the ControlInfo's GraphicComp and returns a copy of the
view's graphic.
SEE ALSO¶
Control(3I), ControlInfo(3U), Graphic(3U), GraphicComp(3U), GraphicView(3U),
KeyMap(3U)