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
/** @header plasma/plasma.h <Plasma/Plasma> */
#include <QtGui/QGraphicsItem>
#include <QtGui/QPainterPath>
#include <plasma/plasma_export.h>
class QGraphicsView;
/**
* Namespace for everything in libplasma
*/
namespace Plasma
{
/**
* The Constraint 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 */
SizeConstraint = 8, /** the size of the applet was changed */
ImmutableConstraint = 16, /** the immutability (locked) nature of the applet changed */
StartupCompletedConstraint = 32, /** application startup has completed */
ContextConstraint = 64, /** the desktop context has changed */
AllConstraints = FormFactorConstraint | LocationConstraint | ScreenConstraint |
SizeConstraint | ImmutableConstraint | ContextConstraint
};
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 constrained 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 direction of a zoom action.
*/
enum ZoomDirection {
ZoomIn = 0, /**< Zoom in one step */
ZoomOut = 1 /**< Zoom out one step */
};
/**
* 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 */
};
/**
* The popup position enumeration relatively to his attached widget
*
**/
enum PopupPlacement {
FloatingPopup = 0, /**< Free floating, non attached popup */
TopPosedLeftAlignedPopup, /**< Popup positioned on the top, aligned
to the left of the wigdet */
TopPosedRightAlignedPopup, /**< Popup positioned on the top, aligned
to the right of the widget */
LeftPosedTopAlignedPopup, /**< Popup positioned on the left, aligned
to the right of the wigdet */
LeftPosedBottomAlignedPopup, /**< Popup positioned on the left, aligned
to the bottom of the widget */
BottomPosedLeftAlignedPopup, /**< Popup positioned on the bottom, aligned
to the left of the wigdet */
BottomPosedRightAlignedPopup, /**< Popup positioned on the bottom, aligned
to the right of the widget */
RightPosedTopAlignedPopup, /**< Popup positioned on the right, aligned
to the top of the wigdet */
RightPosedBottomAlignedPopup /**< Popup positioned on the right, aligned
to the bottom of the widget */
};
/**
* Flip enumeration
*/
enum FlipDirection {
NoFlip = 0, /**< Do not flip */
HorizontalFlip = 1, /**< Flip horizontally */
VerticalFlip = 2 /**< Flip vertically */
};
Q_DECLARE_FLAGS(Flip, FlipDirection)
/**
* 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
};
/**
* Defines the immutability of items like applets, corona and containments
* they can be free to modify, locked down by the user or locked down by the
* system (e.g. kiosk setups).
*/
enum ImmutabilityType {
Mutable = 1, /**< The item can be modified in any way **/
UserImmutable = 2, /**< The user has requested a lock down, and can undo
the lock down at any time **/
SystemImmutable = 4 /**< the item is locked down by the system, the user
can't unlock it **/
};
/**
* Defines the aspect ratio used when scaling an applet
*/
enum AspectRatioMode {
InvalidAspectRatioMode = -1, /**< Unsetted mode used for dev convenience
when there is a need to store the
aspectRatioMode somewhere */
IgnoreAspectRatio = 0, /**< The applet can be freely resized */
KeepAspectRatio = 1, /**< The applet keeps a fixed aspect ratio */
Square = 2, /**< The applet is always a square */
ConstrainedSquare = 3, /**< The applet is no wider (in horizontal
formfactors) or no higher (in vertical
ones) than a square */
FixedSize = 4 /** The applet cannot be resized */
};
/**
* The ComonentType enumeration refers to the various types of components,
* or plugins, supported by plasma.
*/
enum ComponentType {
AppletComponent = 1, /**< Plasma::Applet based plugins **/
DataEngineComponent = 2, /**< Plasma::DataEngine based plugins **/
RunnerComponent = 4, /**< Plasma::AbstractRunner based plugsin **/
AnimatorComponent = 8, /**< Plasma::Animator based plugins **/
ContainmentComponent = 16 /**< Plasma::Containment based plugins **/
};
Q_DECLARE_FLAGS(ComponentTypes, ComponentType)
enum MarginEdge {
TopMargin = 0,
BottomMargin,
LeftMargin,
RightMargin
};
/**
* @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);
/**
* Reccomended position for a popup window like a menu or a tooltip
* given its size
* @param s size of the popup
* @returns reccomended position
*/
PLASMA_EXPORT QPoint popupPosition(const QGraphicsItem *item, const QSize &s);
/**
* Returns the most appropriate QGraphicsView for the item.
*
* @arg item the QGraphicsItem to locate a view for
* @return pointer to a view, or 0 if none was found
*/
PLASMA_EXPORT QGraphicsView *viewFor(const QGraphicsItem *item);
} // Plasma namespace
Q_DECLARE_OPERATORS_FOR_FLAGS(Plasma::Constraints)
Q_DECLARE_OPERATORS_FOR_FLAGS(Plasma::Flip)
Q_DECLARE_OPERATORS_FOR_FLAGS(Plasma::ComponentTypes)
#endif // multiple inclusion guard