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| |
| #ifndef QQUICKGRIDLAYOUTENGINE_P_H |
| #define QQUICKGRIDLAYOUTENGINE_P_H |
| |
| // |
| // W A R N I N G |
| // ------------- |
| // |
| // This file is not part of the Qt API. It exists for the convenience |
| // of the graphics view layout classes. This header |
| // file may change from version to version without notice, or even be removed. |
| // |
| // We mean it. |
| // |
| |
| #include <QtGui/private/qgridlayoutengine_p.h> |
| #include <QtGui/private/qlayoutpolicy_p.h> |
| #include <QtCore/qmath.h> |
| |
| #include "qquickitem.h" |
| #include "qquicklayout_p.h" |
| #include "qdebug.h" |
| QT_BEGIN_NAMESPACE |
| |
| class QQuickGridLayoutItem : public QGridLayoutItem { |
| public: |
| QQuickGridLayoutItem(QQuickItem *item, int row, int column, |
| int rowSpan = 1, int columnSpan = 1, Qt::Alignment alignment = 0) |
| : QGridLayoutItem(row, column, rowSpan, columnSpan, alignment), m_item(item), sizeHintCacheDirty(true), useFallbackToWidthOrHeight(true) {} |
| |
| |
| QSizeF sizeHint(Qt::SizeHint which, const QSizeF &constraint) const override |
| { |
| Q_UNUSED(constraint); // Quick Layouts does not support constraint atm |
| return effectiveSizeHints()[which]; |
| } |
| |
| QSizeF *effectiveSizeHints() const |
| { |
| if (!sizeHintCacheDirty) |
| return cachedSizeHints; |
| |
| QQuickLayout::effectiveSizeHints_helper(m_item, cachedSizeHints, 0, useFallbackToWidthOrHeight); |
| useFallbackToWidthOrHeight = false; |
| |
| sizeHintCacheDirty = false; |
| return cachedSizeHints; |
| } |
| |
| void setCachedSizeHints(QSizeF *sizeHints) |
| { |
| for (int i = 0; i < Qt::NSizeHints; ++i) { |
| cachedSizeHints[i] = sizeHints[i]; |
| } |
| sizeHintCacheDirty = false; |
| } |
| |
| void invalidate() |
| { |
| quickLayoutDebug() << "engine::invalidate()"; |
| sizeHintCacheDirty = true; |
| } |
| |
| QLayoutPolicy::Policy sizePolicy(Qt::Orientation orientation) const override |
| { |
| return QQuickLayout::effectiveSizePolicy_helper(m_item, orientation, attachedLayoutObject(m_item, false)); |
| } |
| |
| void setGeometry(const QRectF &rect) override |
| { |
| QQuickLayoutAttached *info = attachedLayoutObject(m_item, false); |
| const QRectF r = info ? rect.marginsRemoved(info->qMargins()) : rect; |
| const QSizeF oldSize(m_item->width(), m_item->height()); |
| const QSizeF newSize = r.size(); |
| m_item->setPosition(r.topLeft()); |
| if (newSize == oldSize) { |
| if (QQuickLayout *lay = qobject_cast<QQuickLayout *>(m_item)) { |
| if (lay->arrangementIsDirty()) |
| lay->rearrange(newSize); |
| } |
| } else { |
| m_item->setSize(newSize); |
| } |
| } |
| |
| QQuickItem *layoutItem() const { return m_item; } |
| |
| QQuickItem *m_item; |
| private: |
| mutable QSizeF cachedSizeHints[Qt::NSizeHints]; |
| mutable unsigned sizeHintCacheDirty : 1; |
| mutable unsigned useFallbackToWidthOrHeight : 1; |
| }; |
| |
| class QQuickGridLayoutEngine : public QGridLayoutEngine { |
| public: |
| QQuickGridLayoutEngine() : QGridLayoutEngine(Qt::AlignVCenter, true /*snapToPixelGrid*/) { } |
| |
| int indexOf(QQuickItem *item) const { |
| for (int i = 0; i < q_items.size(); ++i) { |
| if (item == static_cast<QQuickGridLayoutItem*>(q_items.at(i))->layoutItem()) |
| return i; |
| } |
| return -1; |
| } |
| |
| QQuickGridLayoutItem *findLayoutItem(QQuickItem *layoutItem) const |
| { |
| for (int i = q_items.count() - 1; i >= 0; --i) { |
| QQuickGridLayoutItem *item = static_cast<QQuickGridLayoutItem*>(q_items.at(i)); |
| if (item->layoutItem() == layoutItem) |
| return item; |
| } |
| return 0; |
| } |
| |
| void setAlignment(QQuickItem *quickItem, Qt::Alignment alignment); |
| Qt::Alignment alignment(QQuickItem *quickItem) const; |
| |
| }; |
| |
| |
| |
| QT_END_NAMESPACE |
| |
| #endif // QQUICKGRIDLAYOUTENGINE_P_H |