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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt3Support module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "q3paintdevicemetrics.h"
QT_BEGIN_NAMESPACE
/*!
\class Q3PaintDeviceMetrics
\brief The Q3PaintDeviceMetrics class provides information about a
paint device.
\compat
Sometimes when drawing graphics it is necessary to obtain
information about the physical characteristics of a paint device.
This class provides the information. For example, to compute the
aspect ratio of a paint device:
\snippet doc/src/snippets/code/src_qt3support_painting_q3paintdevicemetrics.cpp 0
Q3PaintDeviceMetrics contains methods to provide the width and
height of a device in both pixels (width() and height()) and
millimeters (widthMM() and heightMM()), the number of colors the
device supports (numColors()), the number of bit planes (depth()),
and the resolution of the device (logicalDpiX() and
logicalDpiY()).
It is not always possible for Q3PaintDeviceMetrics to compute the
values you ask for, particularly for external devices. The
ultimate example is asking for the resolution of of a QPrinter
that is set to "print to file": who knows what printer that file
will end up on?
*/
/*!
\fn Q3PaintDeviceMetrics::Q3PaintDeviceMetrics(const QPaintDevice *pd)
Constructs a metric for the paint device \a pd.
*/
/*!
\fn int Q3PaintDeviceMetrics::width() const
Returns the width of the paint device in default coordinate system
units (e.g. pixels for QPixmap and QWidget).
*/
/*!
\fn int Q3PaintDeviceMetrics::height() const
Returns the height of the paint device in default coordinate
system units (e.g. pixels for QPixmap and QWidget).
*/
/*!
\fn int Q3PaintDeviceMetrics::widthMM() const
Returns the width of the paint device, measured in millimeters.
*/
/*!
\fn int Q3PaintDeviceMetrics::heightMM() const
Returns the height of the paint device, measured in millimeters.
*/
/*!
\fn int Q3PaintDeviceMetrics::numColors() const
Returns the number of different colors available for the paint
device. Since this value is an int will not be sufficient to represent
the number of colors on 32 bit displays, in which case INT_MAX is
returned instead.
*/
/*!
\fn int Q3PaintDeviceMetrics::depth() const
Returns the bit depth (number of bit planes) of the paint device.
*/
/*!
\fn int Q3PaintDeviceMetrics::logicalDpiX() const
Returns the horizontal resolution of the device in dots per inch,
which is used when computing font sizes. For X, this is usually
the same as could be computed from widthMM(), but it varies on
Windows.
*/
/*!
\fn int Q3PaintDeviceMetrics::logicalDpiY() const
Returns the vertical resolution of the device in dots per inch,
which is used when computing font sizes. For X, this is usually
the same as could be computed from heightMM(), but it varies on
Windows.
*/
/*!
\fn int Q3PaintDeviceMetrics::physicalDpiX() const
\internal
*/
/*!
\fn int Q3PaintDeviceMetrics::physicalDpiY() const
\internal
*/
QT_END_NAMESPACE
|
