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Diffstat (limited to 'examples/layouts/borderlayout/borderlayout.cpp')
| -rw-r--r-- | examples/layouts/borderlayout/borderlayout.cpp | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/examples/layouts/borderlayout/borderlayout.cpp b/examples/layouts/borderlayout/borderlayout.cpp new file mode 100644 index 0000000..25a4778 --- /dev/null +++ b/examples/layouts/borderlayout/borderlayout.cpp @@ -0,0 +1,214 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the examples 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 either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** 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 1.0, 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. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <QtGui> + +#include "borderlayout.h" + +BorderLayout::BorderLayout(QWidget *parent, int margin, int spacing) + : QLayout(parent) +{ + setMargin(margin); + setSpacing(spacing); +} + +BorderLayout::BorderLayout(int spacing) +{ + setSpacing(spacing); +} + + +BorderLayout::~BorderLayout() +{ + QLayoutItem *l; + while ((l = takeAt(0))) + delete l; +} + +void BorderLayout::addItem(QLayoutItem *item) +{ + add(item, West); +} + +void BorderLayout::addWidget(QWidget *widget, Position position) +{ + add(new QWidgetItem(widget), position); +} + +Qt::Orientations BorderLayout::expandingDirections() const +{ + return Qt::Horizontal | Qt::Vertical; +} + +bool BorderLayout::hasHeightForWidth() const +{ + return false; +} + +int BorderLayout::count() const +{ + return list.size(); +} + +QLayoutItem *BorderLayout::itemAt(int index) const +{ + ItemWrapper *wrapper = list.value(index); + if (wrapper) + return wrapper->item; + else + return 0; +} + +QSize BorderLayout::minimumSize() const +{ + return calculateSize(MinimumSize); +} + +void BorderLayout::setGeometry(const QRect &rect) +{ + ItemWrapper *center = 0; + int eastWidth = 0; + int westWidth = 0; + int northHeight = 0; + int southHeight = 0; + int centerHeight = 0; + int i; + + QLayout::setGeometry(rect); + + for (i = 0; i < list.size(); ++i) { + ItemWrapper *wrapper = list.at(i); + QLayoutItem *item = wrapper->item; + Position position = wrapper->position; + + if (position == North) { + item->setGeometry(QRect(rect.x(), northHeight, rect.width(), + item->sizeHint().height())); + + northHeight += item->geometry().height() + spacing(); + } else if (position == South) { + item->setGeometry(QRect(item->geometry().x(), + item->geometry().y(), rect.width(), + item->sizeHint().height())); + + southHeight += item->geometry().height() + spacing(); + + item->setGeometry(QRect(rect.x(), + rect.y() + rect.height() - southHeight + spacing(), + item->geometry().width(), + item->geometry().height())); + } else if (position == Center) { + center = wrapper; + } + } + + centerHeight = rect.height() - northHeight - southHeight; + + for (i = 0; i < list.size(); ++i) { + ItemWrapper *wrapper = list.at(i); + QLayoutItem *item = wrapper->item; + Position position = wrapper->position; + + if (position == West) { + item->setGeometry(QRect(rect.x() + westWidth, northHeight, + item->sizeHint().width(), centerHeight)); + + westWidth += item->geometry().width() + spacing(); + } else if (position == East) { + item->setGeometry(QRect(item->geometry().x(), item->geometry().y(), + item->sizeHint().width(), centerHeight)); + + eastWidth += item->geometry().width() + spacing(); + + item->setGeometry(QRect( + rect.x() + rect.width() - eastWidth + spacing(), + northHeight, item->geometry().width(), + item->geometry().height())); + } + } + + if (center) + center->item->setGeometry(QRect(westWidth, northHeight, + rect.width() - eastWidth - westWidth, + centerHeight)); +} + +QSize BorderLayout::sizeHint() const +{ + return calculateSize(SizeHint); +} + +QLayoutItem *BorderLayout::takeAt(int index) +{ + if (index >= 0 && index < list.size()) { + ItemWrapper *layoutStruct = list.takeAt(index); + return layoutStruct->item; + } + return 0; +} + +void BorderLayout::add(QLayoutItem *item, Position position) +{ + list.append(new ItemWrapper(item, position)); +} + +QSize BorderLayout::calculateSize(SizeType sizeType) const +{ + QSize totalSize; + + for (int i = 0; i < list.size(); ++i) { + ItemWrapper *wrapper = list.at(i); + Position position = wrapper->position; + QSize itemSize; + + if (sizeType == MinimumSize) + itemSize = wrapper->item->minimumSize(); + else // (sizeType == SizeHint) + itemSize = wrapper->item->sizeHint(); + + if (position == North || position == South || position == Center) + totalSize.rheight() += itemSize.height(); + + if (position == West || position == East || position == Center) + totalSize.rwidth() += itemSize.width(); + } + return totalSize; +} |