|
|
|
/****************************************************************************
|
|
|
|
**
|
|
|
|
** Implementation of TQPaintDeviceMetrics class
|
|
|
|
**
|
|
|
|
** Created : 941109
|
|
|
|
**
|
|
|
|
** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
|
|
|
|
**
|
|
|
|
** This file is part of the kernel module of the TQt GUI Toolkit.
|
|
|
|
**
|
|
|
|
** This file may be used under the terms of the GNU General
|
|
|
|
** Public License versions 2.0 or 3.0 as published by the Free
|
|
|
|
** Software Foundation and appearing in the files LICENSE.GPL2
|
|
|
|
** and LICENSE.GPL3 included in the packaging of this file.
|
|
|
|
** Alternatively you may (at your option) use any later version
|
|
|
|
** of the GNU General Public License if such license has been
|
|
|
|
** publicly approved by Trolltech ASA (or its successors, if any)
|
|
|
|
** and the KDE Free TQt Foundation.
|
|
|
|
**
|
|
|
|
** Please review the following information to ensure GNU General
|
|
|
|
** Public Licensing requirements will be met:
|
|
|
|
** http://trolltech.com/products/qt/licenses/licensing/opensource/.
|
|
|
|
** If you are unsure which license is appropriate for your use, please
|
|
|
|
** review the following information:
|
|
|
|
** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
|
|
|
|
** or contact the sales department at sales@trolltech.com.
|
|
|
|
**
|
|
|
|
** This file may be used under the terms of the Q Public License as
|
|
|
|
** defined by Trolltech ASA and appearing in the file LICENSE.TQPL
|
|
|
|
** included in the packaging of this file. Licensees holding valid TQt
|
|
|
|
** Commercial licenses may use this file in accordance with the TQt
|
|
|
|
** Commercial License Agreement provided with the Software.
|
|
|
|
**
|
|
|
|
** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
|
|
|
|
** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
|
|
|
|
** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
|
|
|
|
** herein.
|
|
|
|
**
|
|
|
|
**********************************************************************/
|
|
|
|
|
|
|
|
#include "ntqpaintdevicemetrics.h"
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\class TQPaintDeviceMetrics ntqpaintdevicemetrics.h
|
|
|
|
\brief The TQPaintDeviceMetrics class provides information about a
|
|
|
|
paint device.
|
|
|
|
|
|
|
|
\ingroup graphics
|
|
|
|
\ingroup images
|
|
|
|
|
|
|
|
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:
|
|
|
|
|
|
|
|
\code
|
|
|
|
TQPaintDeviceMetrics pdm( myWidget );
|
|
|
|
double aspect = (double)pdm.widthMM() / (double)pdm.heightMM();
|
|
|
|
\endcode
|
|
|
|
|
|
|
|
TQPaintDeviceMetrics 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 TQPaintDeviceMetrics to compute the
|
|
|
|
values you ask for, particularly for external devices. The
|
|
|
|
ultimate example is asking for the resolution of of a TQPrinter
|
|
|
|
that is set to "print to file": who knows what printer that file
|
|
|
|
will end up on?
|
|
|
|
*/
|
|
|
|
|
|
|
|
/*!
|
|
|
|
Constructs a metric for the paint device \a pd.
|
|
|
|
*/
|
|
|
|
TQPaintDeviceMetrics::TQPaintDeviceMetrics( const TQPaintDevice *pd )
|
|
|
|
{
|
|
|
|
pdev = (TQPaintDevice *)pd;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn int TQPaintDeviceMetrics::width() const
|
|
|
|
|
|
|
|
Returns the width of the paint device in default coordinate system
|
|
|
|
units (e.g. pixels for TQPixmap and TQWidget).
|
|
|
|
*/
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn int TQPaintDeviceMetrics::height() const
|
|
|
|
|
|
|
|
Returns the height of the paint device in default coordinate
|
|
|
|
system units (e.g. pixels for TQPixmap and TQWidget).
|
|
|
|
*/
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn int TQPaintDeviceMetrics::widthMM() const
|
|
|
|
|
|
|
|
Returns the width of the paint device, measured in millimeters.
|
|
|
|
*/
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn int TQPaintDeviceMetrics::heightMM() const
|
|
|
|
|
|
|
|
Returns the height of the paint device, measured in millimeters.
|
|
|
|
*/
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn int TQPaintDeviceMetrics::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 TQPaintDeviceMetrics::depth() const
|
|
|
|
|
|
|
|
Returns the bit depth (number of bit planes) of the paint device.
|
|
|
|
*/
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn int TQPaintDeviceMetrics::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 TQPaintDeviceMetrics::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 TQPaintDeviceMetrics::physicalDpiX() const
|
|
|
|
\internal
|
|
|
|
*/
|
|
|
|
/*!
|
|
|
|
\fn int TQPaintDeviceMetrics::physicalDpiY() const
|
|
|
|
\internal
|
|
|
|
*/
|
|
|
|
|