diff options
Diffstat (limited to 'src/qt3support/painting/q3paintdevicemetrics.cpp')
| -rw-r--r-- | src/qt3support/painting/q3paintdevicemetrics.cpp | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/src/qt3support/painting/q3paintdevicemetrics.cpp b/src/qt3support/painting/q3paintdevicemetrics.cpp new file mode 100644 index 0000000..67546a5 --- /dev/null +++ b/src/qt3support/painting/q3paintdevicemetrics.cpp @@ -0,0 +1,149 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the Qt3Support module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** 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, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#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 |