| /**************************************************************************** |
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| ** Copyright (C) 2016 The Qt Company Ltd. |
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| ** This file is part of the examples of the Qt Toolkit. |
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| ****************************************************************************/ |
| |
| #include "borderlayout.h" |
| |
| BorderLayout::BorderLayout(QWidget *parent, const QMargins &margins, int spacing) |
| : QLayout(parent) |
| { |
| setContentsMargins(margins); |
| 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); |
| return wrapper ? wrapper->item : nullptr; |
| } |
| |
| QSize BorderLayout::minimumSize() const |
| { |
| return calculateSize(MinimumSize); |
| } |
| |
| void BorderLayout::setGeometry(const QRect &rect) |
| { |
| ItemWrapper *center = nullptr; |
| 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 nullptr; |
| } |
| |
| 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; |
| } |