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39 | |
40 | #ifndef QQUICKGRIDLAYOUTENGINE_P_H |
41 | #define QQUICKGRIDLAYOUTENGINE_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 for the convenience |
48 | // of the graphics view layout classes. This header |
49 | // file may change from version to version without notice, or even be removed. |
50 | // |
51 | // We mean it. |
52 | // |
53 | |
54 | #include <QtGui/private/qgridlayoutengine_p.h> |
55 | #include <QtGui/private/qlayoutpolicy_p.h> |
56 | #include <QtCore/qmath.h> |
57 | |
58 | #include "qquickitem.h" |
59 | #include "qquicklayout_p.h" |
60 | #include "qdebug.h" |
61 | QT_BEGIN_NAMESPACE |
62 | |
63 | class QQuickGridLayoutItem : public QGridLayoutItem { |
64 | public: |
65 | QQuickGridLayoutItem(QQuickItem *item, int row, int column, |
66 | int rowSpan = 1, int columnSpan = 1, Qt::Alignment alignment = { }) |
67 | : QGridLayoutItem(row, column, rowSpan, columnSpan, alignment), m_item(item), sizeHintCacheDirty(true), useFallbackToWidthOrHeight(true) {} |
68 | |
69 | |
70 | QSizeF sizeHint(Qt::SizeHint which, const QSizeF &constraint) const override |
71 | { |
72 | Q_UNUSED(constraint); // Quick Layouts does not support constraint atm |
73 | return effectiveSizeHints()[which]; |
74 | } |
75 | |
76 | QSizeF *effectiveSizeHints() const |
77 | { |
78 | if (!sizeHintCacheDirty) |
79 | return cachedSizeHints; |
80 | |
81 | QQuickLayout::effectiveSizeHints_helper(item: m_item, cachedSizeHints, info: 0, useFallbackToWidthOrHeight); |
82 | useFallbackToWidthOrHeight = false; |
83 | |
84 | sizeHintCacheDirty = false; |
85 | return cachedSizeHints; |
86 | } |
87 | |
88 | void setCachedSizeHints(QSizeF *sizeHints) |
89 | { |
90 | for (int i = 0; i < Qt::NSizeHints; ++i) { |
91 | cachedSizeHints[i] = sizeHints[i]; |
92 | } |
93 | sizeHintCacheDirty = false; |
94 | } |
95 | |
96 | void invalidate() |
97 | { |
98 | qCDebug(lcQuickLayouts) << "QQuickGridLayoutItem::invalidate()" ; |
99 | sizeHintCacheDirty = true; |
100 | } |
101 | |
102 | QLayoutPolicy::Policy sizePolicy(Qt::Orientation orientation) const override |
103 | { |
104 | return QQuickLayout::effectiveSizePolicy_helper(item: m_item, orientation, info: attachedLayoutObject(item: m_item, create: false)); |
105 | } |
106 | |
107 | void setGeometry(const QRectF &rect) override |
108 | { |
109 | QQuickLayoutAttached *info = attachedLayoutObject(item: m_item, create: false); |
110 | const QRectF r = info ? rect.marginsRemoved(margins: info->effectiveQMargins()) : rect; |
111 | const QSizeF oldSize(m_item->width(), m_item->height()); |
112 | const QSizeF newSize = r.size(); |
113 | m_item->setPosition(r.topLeft()); |
114 | if (newSize == oldSize) { |
115 | // We need to enforce a rearrange when the geometry is the same |
116 | if (QQuickLayout *lay = qobject_cast<QQuickLayout *>(object: m_item)) { |
117 | if (lay->invalidatedArrangement()) |
118 | lay->rearrange(newSize); |
119 | } |
120 | } else { |
121 | m_item->setSize(newSize); |
122 | } |
123 | } |
124 | |
125 | QQuickItem *layoutItem() const { return m_item; } |
126 | |
127 | QQuickItem *m_item; |
128 | private: |
129 | mutable QSizeF cachedSizeHints[Qt::NSizeHints]; |
130 | mutable unsigned sizeHintCacheDirty : 1; |
131 | mutable unsigned useFallbackToWidthOrHeight : 1; |
132 | }; |
133 | |
134 | class QQuickGridLayoutEngine : public QGridLayoutEngine { |
135 | public: |
136 | QQuickGridLayoutEngine() : QGridLayoutEngine(Qt::AlignVCenter, true /*snapToPixelGrid*/) { } |
137 | |
138 | int indexOf(QQuickItem *item) const { |
139 | for (int i = 0; i < q_items.size(); ++i) { |
140 | if (item == static_cast<QQuickGridLayoutItem*>(q_items.at(i))->layoutItem()) |
141 | return i; |
142 | } |
143 | return -1; |
144 | } |
145 | |
146 | QQuickGridLayoutItem *findLayoutItem(QQuickItem *layoutItem) const |
147 | { |
148 | for (int i = q_items.count() - 1; i >= 0; --i) { |
149 | QQuickGridLayoutItem *item = static_cast<QQuickGridLayoutItem*>(q_items.at(i)); |
150 | if (item->layoutItem() == layoutItem) |
151 | return item; |
152 | } |
153 | return 0; |
154 | } |
155 | |
156 | void setAlignment(QQuickItem *quickItem, Qt::Alignment alignment); |
157 | Qt::Alignment alignment(QQuickItem *quickItem) const; |
158 | |
159 | }; |
160 | |
161 | |
162 | |
163 | QT_END_NAMESPACE |
164 | |
165 | #endif // QQUICKGRIDLAYOUTENGINE_P_H |
166 | |