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Diffstat (limited to 'examples/widgets/graphicsview/flowlayout/flowlayout.cpp')
-rw-r--r-- | examples/widgets/graphicsview/flowlayout/flowlayout.cpp | 170 |
1 files changed, 0 insertions, 170 deletions
diff --git a/examples/widgets/graphicsview/flowlayout/flowlayout.cpp b/examples/widgets/graphicsview/flowlayout/flowlayout.cpp deleted file mode 100644 index ab5f4717b3..0000000000 --- a/examples/widgets/graphicsview/flowlayout/flowlayout.cpp +++ /dev/null @@ -1,170 +0,0 @@ -// Copyright (C) 2016 The Qt Company Ltd. -// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause - -#include "flowlayout.h" - -#include <QtMath> - -FlowLayout::FlowLayout(QGraphicsLayoutItem *parent) : QGraphicsLayout(parent) -{ - QSizePolicy sp = sizePolicy(); - sp.setHeightForWidth(true); - setSizePolicy(sp); -} - -void FlowLayout::insertItem(int index, QGraphicsLayoutItem *item) -{ - item->setParentLayoutItem(this); - if (index > m_items.count() || index < 0) - index = m_items.count(); - m_items.insert(index, item); - invalidate(); -} - -int FlowLayout::count() const -{ - return m_items.count(); -} - -QGraphicsLayoutItem *FlowLayout::itemAt(int index) const -{ - return m_items.value(index); -} - -void FlowLayout::removeAt(int index) -{ - m_items.removeAt(index); - invalidate(); -} - -qreal FlowLayout::spacing(Qt::Orientation o) const -{ - return m_spacing[int(o) - 1]; -} - -void FlowLayout::setSpacing(Qt::Orientations o, qreal spacing) -{ - if (o & Qt::Horizontal) - m_spacing[0] = spacing; - if (o & Qt::Vertical) - m_spacing[1] = spacing; -} - -void FlowLayout::setGeometry(const QRectF &geom) -{ - QGraphicsLayout::setGeometry(geom); - doLayout(geom, true); -} - -qreal FlowLayout::doLayout(const QRectF &geom, bool applyNewGeometry) const -{ - qreal left, top, right, bottom; - getContentsMargins(&left, &top, &right, &bottom); - const qreal maxw = geom.width() - left - right; - - qreal x = 0; - qreal y = 0; - qreal maxRowHeight = 0; - QSizeF pref; - for (QGraphicsLayoutItem *item : m_items) { - pref = item->effectiveSizeHint(Qt::PreferredSize); - maxRowHeight = qMax(maxRowHeight, pref.height()); - - qreal next_x; - next_x = x + pref.width(); - if (next_x > maxw) { - if (qFuzzyIsNull(x)) { - pref.setWidth(maxw); - } else { - x = 0; - next_x = pref.width(); - } - y += maxRowHeight + spacing(Qt::Vertical); - maxRowHeight = 0; - } - - if (applyNewGeometry) - item->setGeometry(QRectF(QPointF(left + x, top + y), pref)); - x = next_x + spacing(Qt::Horizontal); - } - maxRowHeight = qMax(maxRowHeight, pref.height()); - return top + y + maxRowHeight + bottom; -} - -QSizeF FlowLayout::minSize(const QSizeF &constraint) const -{ - QSizeF size(0, 0); - qreal left, top, right, bottom; - getContentsMargins(&left, &top, &right, &bottom); - if (constraint.width() >= 0) { // height for width - const qreal height = doLayout(QRectF(QPointF(0,0), constraint), false); - size = QSizeF(constraint.width(), height); - } else if (constraint.height() >= 0) { // width for height? - // not supported - } else { - for (const QGraphicsLayoutItem *item : std::as_const(m_items)) - size = size.expandedTo(item->effectiveSizeHint(Qt::MinimumSize)); - size += QSizeF(left + right, top + bottom); - } - return size; -} - -QSizeF FlowLayout::prefSize() const -{ - qreal left, right; - getContentsMargins(&left, nullptr, &right, nullptr); - - qreal maxh = 0; - qreal totalWidth = 0; - for (const QGraphicsLayoutItem *item : std::as_const(m_items)) { - if (totalWidth > 0) - totalWidth += spacing(Qt::Horizontal); - QSizeF pref = item->effectiveSizeHint(Qt::PreferredSize); - totalWidth += pref.width(); - maxh = qMax(maxh, pref.height()); - } - maxh += spacing(Qt::Vertical); - - const qreal goldenAspectRatio = 1.61803399; - qreal w = qSqrt(totalWidth * maxh * goldenAspectRatio) + left + right; - - return minSize(QSizeF(w, -1)); -} - -QSizeF FlowLayout::maxSize() const -{ - qreal totalWidth = 0; - qreal totalHeight = 0; - for (const QGraphicsLayoutItem *item : std::as_const(m_items)) { - if (totalWidth > 0) - totalWidth += spacing(Qt::Horizontal); - if (totalHeight > 0) - totalHeight += spacing(Qt::Vertical); - QSizeF pref = item->effectiveSizeHint(Qt::PreferredSize); - totalWidth += pref.width(); - totalHeight += pref.height(); - } - - qreal left, top, right, bottom; - getContentsMargins(&left, &top, &right, &bottom); - return QSizeF(left + totalWidth + right, top + totalHeight + bottom); -} - -QSizeF FlowLayout::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const -{ - QSizeF sh = constraint; - switch (which) { - case Qt::PreferredSize: - sh = prefSize(); - break; - case Qt::MinimumSize: - sh = minSize(constraint); - break; - case Qt::MaximumSize: - sh = maxSize(); - break; - default: - break; - } - return sh; -} |