plasma-framework/plasma.h

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/*
* Copyright 2005 by Aaron Seigo <aseigo@kde.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library General Public License as
* published by the Free Software Foundation; either version 2, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details
*
* You should have received a copy of the GNU Library General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef PLASMA_DEFS_H
#define PLASMA_DEFS_H
#include <QtGui/QGraphicsItem>
#include <QtGui/QPainterPath>
#include <plasma/plasma_export.h>
/**
* Namespace for everything in libplasma
*/
namespace Plasma
{
/**
* The Constriants enumeration lists the various constraints that Plasma
* objects have managed for them and which they may wish to react to,
* for instance in Applet::constraintsUpdated
*/
enum Constraint { NoConstraint = 0,
FormFactorConstraint = 1 /** The FormFactor for an object */,
LocationConstraint = 2 /** The Location of an object */,
ScreenConstraint = 4 /** Which screen an object is on */,
AllConstraints = FormFactorConstraint | LocationConstraint | ScreenConstraint
};
Q_DECLARE_FLAGS(Constraints, Constraint)
/**
* The FormFactor enumeration describes how a Plasma::Applet should arrange
* itself. The value is derived from the container managing the Applet
* (e.g. in Plasma, a Corona on the desktop or on a panel).
**/
enum FormFactor { Planar = 0 /**< The applet lives in a plane and has two
degrees of freedom to grow. Optimize for
desktop, laptop or tablet usage: a high
resolution screen 1-3 feet distant from the
viewer. */,
MediaCenter /**< As with Planar, the applet lives in a plane
but the interface should be optimized for
medium-to-high resolution screens that are
5-15 feet distant from the viewer. Sometimes
referred to as a "ten foot interface".*/,
Horizontal /**< The applet is constrained vertically, but
can expand horizontally. */,
Vertical /**< The applet is contrained horizontally, but
can expand vertically. */
};
/**
* The Direction enumeration describes in which direction, relative to the
* Applet (and its managing container), popup menus, expanders, balloons,
* message boxes, arrows and other such visually associated widgets should
* appear in. This is usually the oposite of the Location.
**/
enum Direction { Down = 0 /**< Display downards */ ,
Up /**< Display upwards */,
Left /**< Display to the left */,
Right /**< Display to the right */
};
/**
* The Location enumeration describes where on screen an element, such as an
* Applet or its managing container, is positioned on the screen.
**/
enum Location { Floating = 0 /**< Free floating. Neither geometry or z-ordering
is described precisely by this value. */,
Desktop /**< On the planar desktop layer, extending across
the full screen from edge to edge */,
FullScreen /**< Full screen */,
TopEdge /**< Along the top of the screen*/,
BottomEdge /**< Along the bottom of the screen*/,
LeftEdge /**< Along the left side of the screen */,
RightEdge /**< Along the right side of the screen */
};
/**
* The position enumeration
*
**/
enum Position { LeftPositioned /**< Positioned left */,
RightPositioned /**< Positioned right */,
TopPositioned /**< Positioned top */,
BottomPositioned /**< Positioned bottom */,
CenterPositioned /**< Positioned in the center */
};
/**
* Zoom levels that Plasma is aware of...
**/
enum ZoomLevel { DesktopZoom = 0 /**< Normal desktop usage, plasmoids are painted normally and have full interaction */,
GroupZoom /**< Plasmoids are shown as icons in visual groups; drag and drop and limited context menu interaction only */ ,
OverviewZoom /**< Groups become icons themselves */
};
/**
* Possible timing alignments
**/
enum IntervalAlignment { NoAlignment = 0,
AlignToMinute,
AlignToHour };
enum ItemTypes { AppletType = QGraphicsItem::UserType + 1,
LineEditType = QGraphicsItem::UserType + 2
};
/**
* @return the scaling factor (0..1) for a ZoomLevel
**/
PLASMA_EXPORT qreal scalingFactor(ZoomLevel level);
/**
* Converts a location to a direction. Handy for figuring out which way to send a popup based on
* location or to point arrows and other directional items.
*
* @param location the location of the container the element will appear in
* @reutrn the visual direction of the element should be oriented in
**/
PLASMA_EXPORT Direction locationToDirection(Location location);
/**
* Returns a nicely rounded rectanglular path for painting.
*/
PLASMA_EXPORT QPainterPath roundedRectangle(const QRectF& rect, qreal radius);
} // Plasma namespace
Q_DECLARE_OPERATORS_FOR_FLAGS(Plasma::Constraints)
#endif // multiple inclusion guard