author | Eckhart Koeppen <eckhart.koppen@nokia.com> |
Wed, 21 Apr 2010 11:15:19 +0300 | |
branch | RCL_3 |
changeset 11 | 25a739ee40f4 |
parent 4 | 3b1da2848fc7 |
permissions | -rw-r--r-- |
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/**************************************************************************** |
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** |
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3b1da2848fc7
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
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diff
changeset
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). |
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** All rights reserved. |
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** Contact: Nokia Corporation (qt-info@nokia.com) |
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** |
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** This file is part of the documentation of the Qt Toolkit. |
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** |
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** $QT_BEGIN_LICENSE:LGPL$ |
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** No Commercial Usage |
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** This file contains pre-release code and may not be distributed. |
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** You may use this file in accordance with the terms and conditions |
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** contained in the Technology Preview License Agreement accompanying |
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** this package. |
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** |
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** GNU Lesser General Public License Usage |
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** Alternatively, this file may be used under the terms of the GNU Lesser |
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** General Public License version 2.1 as published by the Free Software |
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** Foundation and appearing in the file LICENSE.LGPL included in the |
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** packaging of this file. Please review the following information to |
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** ensure the GNU Lesser General Public License version 2.1 requirements |
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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** |
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** In addition, as a special exception, Nokia gives you certain additional |
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** rights. These rights are described in the Nokia Qt LGPL Exception |
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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** |
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** If you have questions regarding the use of this file, please contact |
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** Nokia at qt-info@nokia.com. |
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** |
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** |
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** |
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** |
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** |
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** |
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** |
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** |
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** $QT_END_LICENSE$ |
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** |
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****************************************************************************/ |
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/*! |
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\class QSizePolicy |
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\brief The QSizePolicy class is a layout attribute describing horizontal |
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and vertical resizing policy. |
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\ingroup geomanagement |
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The size policy of a widget is an expression of its willingness to |
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be resized in various ways, and affects how the widget is treated |
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by the \l{Layout Management}{layout engine}. Each widget returns a |
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QSizePolicy that describes the horizontal and vertical resizing |
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policy it prefers when being laid out. You can change this for |
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a specific widget by changing its QWidget::sizePolicy property. |
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QSizePolicy contains two independent QSizePolicy::Policy values |
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and two stretch factors; one describes the widgets's horizontal |
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size policy, and the other describes its vertical size policy. It |
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also contains a flag to indicate whether the height and width of |
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its preferred size are related. |
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The horizontal and vertical policies can be set in the |
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constructor, and altered using the setHorizontalPolicy() and |
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setVerticalPolicy() functions. The stretch factors can be set |
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using the setHorizontalStretch() and setVerticalStretch() |
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functions. The flag indicating whether the widget's |
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\l{QWidget::sizeHint()}{sizeHint()} is width-dependent (such as a |
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menu bar or a word-wrapping label) can be set using the |
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setHeightForWidth() function. |
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The current size policies and stretch factors be retrieved using |
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the horizontalPolicy(), verticalPolicy(), horizontalStretch() and |
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verticalStretch() functions. Alternatively, use the transpose() |
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function to swap the horizontal and vertical policies and |
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stretches. The hasHeightForWidth() function returns the current |
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status of the flag indicating the size hint dependencies. |
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Use the expandingDirections() function to determine whether the |
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associated widget can make use of more space than its |
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\l{QWidget::sizeHint()}{sizeHint()} function indicates, as well as |
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find out in which directions it can expand. |
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Finally, the QSizePolicy class provides operators comparing this |
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size policy to a given policy, as well as a QVariant operator |
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storing this QSizePolicy as a QVariant object. |
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\sa QSize, QWidget::sizeHint(), QWidget::sizePolicy, |
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QLayoutItem::sizeHint() |
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*/ |
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/*! |
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\enum QSizePolicy::PolicyFlag |
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These flags are combined together to form the various \l{Policy} |
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values: |
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\value GrowFlag The widget can grow beyond its size hint if necessary. |
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\value ExpandFlag The widget should get as much space as possible. |
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\value ShrinkFlag The widget can shrink below its size hint if necessary. |
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\value IgnoreFlag The widget's size hint is ignored. The widget will get |
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as much space as possible. |
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\sa Policy |
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*/ |
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/*! |
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\enum QSizePolicy::Policy |
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This enum describes the various per-dimension sizing types used |
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when constructing a QSizePolicy. |
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\value Fixed The QWidget::sizeHint() is the only acceptable |
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alternative, so the widget can never grow or shrink (e.g. the |
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vertical direction of a push button). |
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\value Minimum The sizeHint() is minimal, and sufficient. The |
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widget can be expanded, but there is no advantage to it being |
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larger (e.g. the horizontal direction of a push button). |
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It cannot be smaller than the size provided by sizeHint(). |
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\value Maximum The sizeHint() is a maximum. The widget can be |
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shrunk any amount without detriment if other widgets need the |
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space (e.g. a separator line). |
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It cannot be larger than the size provided by sizeHint(). |
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\value Preferred The sizeHint() is best, but the widget can be |
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shrunk and still be useful. The widget can be expanded, but there |
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is no advantage to it being larger than sizeHint() (the default |
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QWidget policy). |
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\value Expanding The sizeHint() is a sensible size, but the |
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widget can be shrunk and still be useful. The widget can make use |
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of extra space, so it should get as much space as possible (e.g. |
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the horizontal direction of a horizontal slider). |
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\value MinimumExpanding The sizeHint() is minimal, and sufficient. |
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The widget can make use of extra space, so it should get as much |
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space as possible (e.g. the horizontal direction of a horizontal |
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slider). |
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\value Ignored The sizeHint() is ignored. The widget will get as |
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much space as possible. |
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\sa PolicyFlag, setHorizontalPolicy(), setVerticalPolicy() |
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*/ |
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/*! |
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\fn QSizePolicy::QSizePolicy() |
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Constructs a QSizePolicy object with \l Fixed as its horizontal |
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and vertical policies. |
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The policies can be altered using the setHorizontalPolicy() and |
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setVerticalPolicy() functions. Use the setHeightForWidth() |
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function if the preferred height of the widget is dependent on the |
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width of the widget (for example, a QLabel with line wrapping). |
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\sa setHorizontalStretch(), setVerticalStretch() |
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*/ |
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/*! |
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\fn QSizePolicy::QSizePolicy(Policy horizontal, Policy vertical) |
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Constructs a QSizePolicy object with the given \a horizontal and |
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\a vertical policies, and DefaultType as the control type. |
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Use setHeightForWidth() if the preferred height of the widget is |
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dependent on the width of the widget (for example, a QLabel with |
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line wrapping). |
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\sa setHorizontalStretch(), setVerticalStretch() |
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*/ |
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/*! |
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\fn QSizePolicy::QSizePolicy(Policy horizontal, Policy vertical, ControlType type) |
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\since 4.3 |
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Constructs a QSizePolicy object with the given \a horizontal and |
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\a vertical policies, and the specified control \a type. |
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Use setHeightForWidth() if the preferred height of the widget is |
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dependent on the width of the widget (for example, a QLabel with |
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line wrapping). |
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\sa setHorizontalStretch(), setVerticalStretch(), controlType() |
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*/ |
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/*! |
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\fn QSizePolicy::Policy QSizePolicy::horizontalPolicy() const |
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Returns the horizontal component of the size policy. |
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\sa setHorizontalPolicy(), verticalPolicy(), horizontalStretch() |
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*/ |
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/*! |
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\fn QSizePolicy::Policy QSizePolicy::verticalPolicy() const |
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Returns the vertical component of the size policy. |
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\sa setVerticalPolicy(), horizontalPolicy(), verticalStretch() |
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*/ |
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/*! |
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\fn void QSizePolicy::setHorizontalPolicy(Policy policy) |
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Sets the horizontal component to the given \a policy. |
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\sa horizontalPolicy(), setVerticalPolicy(), setHorizontalStretch() |
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*/ |
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/*! |
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\fn void QSizePolicy::setVerticalPolicy(Policy policy) |
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Sets the vertical component to the given \a policy. |
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\sa verticalPolicy(), setHorizontalPolicy(), setVerticalStretch() |
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*/ |
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/*! |
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\fn Qt::Orientations QSizePolicy::expandingDirections() const |
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Returns whether a widget can make use of more space than the |
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QWidget::sizeHint() function indicates. |
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A value of Qt::Horizontal or Qt::Vertical means that the widget |
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can grow horizontally or vertically (i.e., the horizontal or |
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vertical policy is \l Expanding or \l MinimumExpanding), whereas |
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Qt::Horizontal | Qt::Vertical means that it can grow in both |
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dimensions. |
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\sa horizontalPolicy(), verticalPolicy() |
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*/ |
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/*! |
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\fn ControlType QSizePolicy::controlType() const |
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\since 4.3 |
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Returns the control type associated with the widget for which |
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this size policy applies. |
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*/ |
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/*! |
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\fn void QSizePolicy::setControlType(ControlType type) |
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\since 4.3 |
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Sets the control type associated with the widget for which this |
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size policy applies to \a type. |
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The control type specifies the type of the widget for which this |
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size policy applies. It is used by some styles, notably |
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QMacStyle, to insert proper spacing between widgets. For example, |
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the Mac OS X Aqua guidelines specify that push buttons should be |
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separated by 12 pixels, whereas vertically stacked radio buttons |
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only require 6 pixels. |
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\sa QStyle::layoutSpacing() |
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*/ |
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/*! |
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\fn void QSizePolicy::setHeightForWidth(bool dependent) |
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Sets the flag determining whether the widget's preferred height |
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depends on its width, to \a dependent. |
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\sa hasHeightForWidth() |
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*/ |
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/*! |
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\fn bool QSizePolicy::hasHeightForWidth() const |
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Returns true if the widget's preferred height depends on its |
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width; otherwise returns false. |
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\sa setHeightForWidth() |
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*/ |
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/*! |
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\fn bool QSizePolicy::operator==(const QSizePolicy &other) const |
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Returns true if this policy is equal to \a other; otherwise |
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returns false. |
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\sa operator!=() |
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*/ |
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/*! |
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\fn bool QSizePolicy::operator!=(const QSizePolicy &other) const |
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Returns true if this policy is different from \a other; otherwise |
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returns false. |
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\sa operator==() |
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*/ |
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/*! |
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\fn int QSizePolicy::horizontalStretch() const |
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Returns the horizontal stretch factor of the size policy. |
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\sa setHorizontalStretch(), verticalStretch(), horizontalPolicy() |
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*/ |
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/*! |
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\fn int QSizePolicy::verticalStretch() const |
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Returns the vertical stretch factor of the size policy. |
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\sa setVerticalStretch(), horizontalStretch(), verticalPolicy() |
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*/ |
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/*! |
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\fn void QSizePolicy::setHorizontalStretch(uchar stretchFactor) |
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Sets the horizontal stretch factor of the size policy to the given \a |
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stretchFactor. |
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\sa horizontalStretch(), setVerticalStretch(), setHorizontalPolicy() |
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*/ |
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/*! |
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\fn void QSizePolicy::setVerticalStretch(uchar stretchFactor) |
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Sets the vertical stretch factor of the size policy to the given |
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\a stretchFactor. |
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\sa verticalStretch(), setHorizontalStretch(), setVerticalPolicy() |
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*/ |
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/*! |
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\fn void QSizePolicy::transpose() |
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Swaps the horizontal and vertical policies and stretches. |
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*/ |
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/*! |
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\enum QSizePolicy::ControlType |
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\since 4.3 |
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This enum specifies the different types of widgets in terms of |
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layout interaction: |
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\value DefaultType The default type, when none is specified. |
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\value ButtonBox A QDialogButtonBox instance. |
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\value CheckBox A QCheckBox instance. |
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\value ComboBox A QComboBox instance. |
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\value Frame A QFrame instance. |
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\value GroupBox A QGroupBox instance. |
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\value Label A QLabel instance. |
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\value Line A QFrame instance with QFrame::HLine or QFrame::VLine. |
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\value LineEdit A QLineEdit instance. |
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\value PushButton A QPushButton instance. |
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\value RadioButton A QRadioButton instance. |
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\value Slider A QAbstractSlider instance. |
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\value SpinBox A QAbstractSpinBox instance. |
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\value TabWidget A QTabWidget instance. |
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\value ToolButton A QToolButton instance. |
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\sa setControlType(), controlType() |
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*/ |
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#ifdef QT3_SUPPORT |
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/*! |
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\typedef QSizePolicy::SizeType |
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\compat |
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Use the QSizePolicy::Policy enum instead. |
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*/ |
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/*! |
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\enum QSizePolicy::ExpandData |
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\compat |
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Use the Qt::Orientations enum instead. |
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\value NoDirection Use 0 instead. |
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\value Horizontally Use Qt::Horizontal instead. |
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\value Vertically Use Qt::Vertical instead. |
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\value BothDirections Use Qt::Horizontal | Qt::Vertical instead. |
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*/ |
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/*! |
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\fn bool QSizePolicy::mayShrinkHorizontally() const |
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Use the horizontalPolicy() function combined with the |
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QSizePolicy::PolicyFlag enum instead. |
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\oldcode |
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bool policy = mayShrinkHorizontally(); |
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\newcode |
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bool policy = horizontalPolicy() & QSizePolicy::ShrinkFlag; |
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\endcode |
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*/ |
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/*! |
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\fn bool QSizePolicy::mayShrinkVertically() const |
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Use the verticalPolicy() function combined with the |
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QSizePolicy::PolicyFlag enum instead. |
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\oldcode |
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bool policy = mayShrinkVertically(); |
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\newcode |
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bool policy = verticalPolicy() & QSizePolicy::ShrinkFlag; |
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\endcode |
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*/ |
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/*! |
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\fn bool QSizePolicy::mayGrowHorizontally() const |
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Use the horizontalPolicy() function combined with the |
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QSizePolicy::PolicyFlag enum instead. |
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\oldcode |
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bool policy = mayGrowHorizontally(); |
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\newcode |
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bool policy = horizontalPolicy() & QSizePolicy::GrowFlag; |
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\endcode |
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*/ |
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/*! |
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\fn bool QSizePolicy::mayGrowVertically() const |
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Use the verticalPolicy() function combined with the |
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QSizePolicy::PolicyFlag enum instead. |
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||
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\oldcode |
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bool policy = mayGrowVertically(); |
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\newcode |
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bool policy = verticalPolicy() & QSizePolicy::GrowFlag; |
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\endcode |
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*/ |
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||
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/*! |
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\fn Qt::QSizePolicy::Orientations QSizePolicy::expanding() const |
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Use expandingDirections() instead. |
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*/ |
|
439 |
||
440 |
/*! |
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\fn QSizePolicy::QSizePolicy(Policy horizontal, Policy vertical, bool dependent) |
|
442 |
||
443 |
Use the QSizePolicy() constructor and the setHeightForWidth() |
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function instead. |
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||
446 |
\oldcode |
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QSizePolicy *policy = new QSizePolicy(horizontal, vertical, dependent); |
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\newcode |
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QSizePolicy *policy = new QSizePolicy(horizontal, vertical); |
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policy->setHeightForWidth(dependent); |
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\endcode |
|
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*/ |
|
453 |
||
454 |
/*! |
|
455 |
\fn QSizePolicy::QSizePolicy(Policy horizontal, Policy vertical, uchar horizontalStretch, |
|
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uchar verticalStretch, bool dependent) |
|
457 |
||
458 |
Use the QSizePolicy() constructor and call the |
|
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setHorizontalStretch(), setVerticalStretch(), and |
|
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setHeightForWidth() functions instead. |
|
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||
462 |
\oldcode |
|
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QSizePolicy *policy = new QSizePolicy(horizontal, vertical, |
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horizontalStretch, verticalStretch, |
|
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dependent); |
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\newcode |
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QSizePolicy *policy = new QSizePolicy(horizontal, vertical); |
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policy->setHorizontalStretch(horizontalStretch); |
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policy->setVerticalStretch(verticalStretch); |
|
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policy->setHeightForWidth(dependent); |
|
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\endcode |
|
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*/ |
|
473 |
||
474 |
/*! |
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475 |
\fn QSizePolicy::Policy QSizePolicy::horData() const |
|
476 |
||
477 |
Use horizontalPolicy() instead. |
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*/ |
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||
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/*! |
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\fn QSizePolicy::Policy QSizePolicy::verData() const |
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483 |
Use verticalPolicy() instead. |
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*/ |
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||
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/*! |
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\fn void QSizePolicy::setHorData(Policy policy) |
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489 |
Use setHorizontalPolicy() instead. |
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*/ |
|
491 |
||
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/*! |
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\fn void QSizePolicy::setVerData(Policy policy) |
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||
495 |
Use setVerticalPolicy() instead. |
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*/ |
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||
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/*! |
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\fn uint QSizePolicy::horStretch() const |
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500 |
||
501 |
Use horizontalStretch() instead. |
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*/ |
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||
504 |
/*! |
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\fn uint QSizePolicy::verStretch() const |
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||
507 |
Use verticalStretch() instead. |
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*/ |
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||
510 |
/*! |
|
511 |
\fn void QSizePolicy::setHorStretch(uchar stretch) |
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512 |
||
513 |
Use setHorizontalStretch() instead. |
|
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*/ |
|
515 |
||
516 |
/*! |
|
517 |
\fn void QSizePolicy::setVerStretch(uchar stretch) |
|
518 |
||
519 |
Use setVerticalStretch() instead. |
|
520 |
*/ |
|
521 |
#endif |