1 /**************************************************************************** 2 ** 3 ** Copyright (C) 2016 The Qt Company Ltd. 4 ** Contact: https://www.qt.io/licensing/ 5 ** 6 ** This file is part of the QtWidgets module of the Qt Toolkit. 7 ** 8 ** $QT_BEGIN_LICENSE:LGPL$ 9 ** Commercial License Usage 10 ** Licensees holding valid commercial Qt licenses may use this file in 11 ** accordance with the commercial license agreement provided with the 12 ** Software or, alternatively, in accordance with the terms contained in 13 ** a written agreement between you and The Qt Company. For licensing terms 14 ** and conditions see https://www.qt.io/terms-conditions. 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The licenses are as published by the Free Software 30 ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 31 ** included in the packaging of this file. Please review the following 32 ** information to ensure the GNU General Public License requirements will 33 ** be met: https://www.gnu.org/licenses/gpl-2.0.html and 34 ** https://www.gnu.org/licenses/gpl-3.0.html. 35 ** 36 ** $QT_END_LICENSE$ 37 ** 38 ****************************************************************************/ 39 40 #ifndef QGRAPHICSGRIDLAYOUTENGINE_P_H 41 #define QGRAPHICSGRIDLAYOUTENGINE_P_H 42 43 // 44 // W A R N I N G 45 // ------------- 46 // 47 // This file is not part of the Qt API. It exists purely as an 48 // implementation detail. This header file may change from version to 49 // version without notice, or even be removed. 50 // 51 // We mean it. 52 // 53 54 #include <QtWidgets/private/qtwidgetsglobal_p.h> 55 #include <QtGui/private/qgridlayoutengine_p.h> 56 57 #include <QtWidgets/qsizepolicy.h> 58 #include <QtWidgets/qstyle.h> 59 #include <QtWidgets/qstyleoption.h> 60 #include "qgraphicslayoutitem.h" 61 62 QT_REQUIRE_CONFIG(graphicsview); 63 64 QT_BEGIN_NAMESPACE 65 66 class QGraphicsLayoutPrivate; 67 68 class QGraphicsGridLayoutEngineItem : public QGridLayoutItem { 69 public: 70 QGraphicsGridLayoutEngineItem(QGraphicsLayoutItem *item, int row, int columns, int rowSpan = 1, int columnSpan = 1, 71 Qt::Alignment alignment = { }) QGridLayoutItem(row,columns,rowSpan,columnSpan,alignment)72 : QGridLayoutItem(row, columns, rowSpan, columnSpan, alignment), q_layoutItem(item) {} 73 sizePolicy(Qt::Orientation orientation)74 virtual QLayoutPolicy::Policy sizePolicy(Qt::Orientation orientation) const override 75 { 76 QSizePolicy sizePolicy(q_layoutItem->sizePolicy()); 77 return (QLayoutPolicy::Policy)((orientation == Qt::Horizontal) ? sizePolicy.horizontalPolicy() 78 : sizePolicy.verticalPolicy()); 79 } 80 controlTypes(LayoutSide)81 virtual QLayoutPolicy::ControlTypes controlTypes(LayoutSide) const override 82 { 83 const QSizePolicy::ControlType ct = q_layoutItem->sizePolicy().controlType(); 84 return (QLayoutPolicy::ControlTypes)ct; 85 } 86 sizeHint(Qt::SizeHint which,const QSizeF & constraint)87 virtual QSizeF sizeHint(Qt::SizeHint which, const QSizeF &constraint) const override 88 { 89 return q_layoutItem->effectiveSizeHint(which, constraint); 90 } 91 92 bool isHidden() const; 93 94 virtual bool isIgnored() const override; 95 setGeometry(const QRectF & rect)96 virtual void setGeometry(const QRectF &rect) override 97 { 98 q_layoutItem->setGeometry(rect); 99 } 100 101 virtual bool hasDynamicConstraint() const override; 102 virtual Qt::Orientation dynamicConstraintOrientation() const override; 103 layoutItem()104 QGraphicsLayoutItem *layoutItem() const { return q_layoutItem; } 105 106 protected: 107 QGraphicsLayoutItem *q_layoutItem; 108 }; 109 110 111 class QGraphicsGridLayoutEngine : public QGridLayoutEngine 112 { 113 public: findLayoutItem(QGraphicsLayoutItem * layoutItem)114 QGraphicsGridLayoutEngineItem *findLayoutItem(QGraphicsLayoutItem *layoutItem) const 115 { 116 const int index = indexOf(layoutItem); 117 if (index < 0) 118 return nullptr; 119 return static_cast<QGraphicsGridLayoutEngineItem*>(q_items.at(index)); 120 } 121 indexOf(QGraphicsLayoutItem * item)122 int indexOf(QGraphicsLayoutItem *item) const 123 { 124 for (int i = 0; i < q_items.count(); ++i) { 125 if (item == static_cast<QGraphicsGridLayoutEngineItem*>(q_items.at(i))->layoutItem()) 126 return i; 127 } 128 return -1; 129 } 130 131 void setAlignment(QGraphicsLayoutItem *graphicsLayoutItem, Qt::Alignment alignment); 132 Qt::Alignment alignment(QGraphicsLayoutItem *graphicsLayoutItem) const; 133 134 void setStretchFactor(QGraphicsLayoutItem *layoutItem, int stretch, Qt::Orientation orientation); 135 int stretchFactor(QGraphicsLayoutItem *layoutItem, Qt::Orientation orientation) const; 136 137 }; 138 139 QT_END_NAMESPACE 140 141 #endif // QGRAPHICSGRIDLAYOUTENGINE_P_H 142