Initial commit.

src/widgets/groupediconview.h

@@ -0,0 +1,116 @@
+/*
+ * Strawberry Music Player
+ * This file was part of Clementine.
+ * Copyright 2010, David Sansome <me@davidsansome.com>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ * 
+ */
+
+#ifndef GROUPEDICONVIEW_H
+#define GROUPEDICONVIEW_H
+
+#include "config.h"
+
+#include <QListView>
+
+class MultiSortFilterProxy;
+
+
+class GroupedIconView : public QListView {
+  Q_OBJECT
+
+  // Vertical space separating a header from the items above and below it.
+  Q_PROPERTY(int header_spacing READ header_spacing WRITE set_header_spacing)
+
+  // Horizontal space separating a header from the left and right edges of the widget.
+  Q_PROPERTY(int header_indent READ header_indent WRITE set_header_indent)
+
+  // Horizontal space separating an item from the left and right edges of the widget.
+  Q_PROPERTY(int item_indent READ item_indent WRITE set_item_indent)
+
+  // The text of each group's header.  Must contain "%1".
+  Q_PROPERTY(QString header_text READ header_text WRITE set_header_text);
+
+ public:
+  GroupedIconView(QWidget *parent = nullptr);
+
+  enum Role {
+    Role_Group = 1158300,
+  };
+
+  void AddSortSpec(int role, Qt::SortOrder order = Qt::AscendingOrder);
+
+  int header_spacing() const { return header_spacing_; }
+  int header_indent() const { return header_indent_; }
+  int item_indent() const { return item_indent_; }
+  const QString &header_text() const { return header_text_;}
+
+  void set_header_spacing(int value) { header_spacing_ = value; }
+  void set_header_indent(int value) { header_indent_ = value; }
+  void set_item_indent(int value) { item_indent_ = value; }
+  void set_header_text(const QString &value) { header_text_ = value; }
+
+  // QAbstractItemView
+  QModelIndex moveCursor(CursorAction action, Qt::KeyboardModifiers modifiers);
+  void setModel(QAbstractItemModel *model);
+
+  static void DrawHeader(QPainter *painter, const QRect &rect, const QFont &font, const QPalette &palette, const QString &text);
+
+protected:
+  virtual int header_height() const;
+
+  // QWidget
+  void paintEvent(QPaintEvent *e);
+  void resizeEvent(QResizeEvent *e);
+
+  // QAbstractItemView
+  void dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight, const QVector<int>& = QVector<int>());
+  QModelIndex indexAt(const QPoint &p) const;
+  void rowsInserted(const QModelIndex &parent, int start, int end);
+  void setSelection(const QRect &rect, QItemSelectionModel::SelectionFlags command);
+  QRect visualRect(const QModelIndex &index) const;
+  QRegion visualRegionForSelection(const QItemSelection &selection) const;
+
+private slots:
+  void LayoutItems();
+
+private:
+  static const int kBarThickness;
+  static const int kBarMarginTop;
+
+  struct Header {
+    int y;
+    int first_row;
+    QString text;
+  };
+
+  // Returns the items that are wholly or partially inside the rect.
+  QVector<QModelIndex> IntersectingItems(const QRect &rect) const;
+
+  // Returns the index of the item above (d=-1) or below (d=+1) the given item.
+  int IndexAboveOrBelow(int index, int d) const;
+
+  MultiSortFilterProxy *proxy_model_;
+  QVector<QRect> visual_rects_;
+  QVector<Header> headers_;
+
+  const int default_header_height_;
+  int header_spacing_;
+  int header_indent_;
+  int item_indent_;
+  QString header_text_;
+};
+
+#endif  // GROUPEDICONVIEW_H