borderlayout.cpp Example File

layouts/borderlayout/borderlayout.cpp
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#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; }

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