Unity 8
organicgrid.h
1 /*
2  * Copyright (C) 2014 Canonical, Ltd.
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License as published by
6  * the Free Software Foundation; version 3.
7  *
8  * This program is distributed in the hope that it will be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11  * GNU General Public License for more details.
12  *
13  * You should have received a copy of the GNU General Public License
14  * along with this program. If not, see <http://www.gnu.org/licenses/>.
15  */
16 
17 #ifndef ORGANICGRID_H
18 #define ORGANICGRID_H
19 
20 #include "abstractdashview.h"
21 
49 class OrganicGrid : public AbstractDashView
50 {
51  Q_OBJECT
52 
53  Q_PROPERTY(QSizeF smallDelegateSize READ smallDelegateSize WRITE setSmallDelegateSize NOTIFY smallDelegateSizeChanged)
54  Q_PROPERTY(QSizeF bigDelegateSize READ bigDelegateSize WRITE setBigDelegateSize NOTIFY bigDelegateSizeChanged)
55 
56 friend class OrganicGridTest;
57 
58 public:
59  OrganicGrid();
60 
61  QSizeF smallDelegateSize() const;
62  void setSmallDelegateSize(const QSizeF &size);
63 
64  QSizeF bigDelegateSize() const;
65  void setBigDelegateSize(const QSizeF &size);
66 
67 Q_SIGNALS:
68  void smallDelegateSizeChanged();
69  void bigDelegateSizeChanged();
70 private:
71  QPointF positionForIndex(int modelIndex) const;
72  QSizeF sizeForIndex(int modelIndex) const;
73 
74  void findBottomModelIndexToAdd(int *modelIndex, qreal *yPos) override;
75  void findTopModelIndexToAdd(int *modelIndex, qreal *yPos) override;
76  void addItemToView(int modelIndex, QQuickItem *item) override;
77  bool removeNonVisibleItems(qreal bufferFromY, qreal bufferToY) override;
78  void cleanupExistingItems() override;
79  void doRelayout() override;
80  void updateItemCulling(qreal visibleFromY, qreal visibleToY) override;
81  void calculateImplicitHeight() override;
82  void processModelRemoves(const QVector<QQmlChangeSet::Change> &removes) override;
83 
84  QSizeF m_smallDelegateSize;
85  QSizeF m_bigDelegateSize;
86  int m_firstVisibleIndex;
87  int m_numberOfModulesPerRow;
88  QList<QQuickItem*> m_visibleItems;
89 };
90 
91 #endif