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// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef VIEWS_CONTROLS_TABLE_GROUP_TABLE_VIEW_H_
#define VIEWS_CONTROLS_TABLE_GROUP_TABLE_VIEW_H_
#include "base/task.h"
#include "views/controls/table/table_view.h"
// The GroupTableView adds grouping to the TableView class.
// It allows to have groups of rows that act as a single row from the selection
// perspective. Groups are visually separated by a horizontal line.
namespace views {
struct GroupRange {
int start;
int length;
};
// The model driving the GroupTableView.
class GroupTableModel : public TableModel {
public:
// Populates the passed range with the first row/last row (included)
// that this item belongs to.
virtual void GetGroupRangeForItem(int item, GroupRange* range) = 0;
};
class GroupTableView : public TableView {
public:
// The view class name.
static const char kViewClassName[];
GroupTableView(GroupTableModel* model,
const std::vector<TableColumn>& columns,
TableTypes table_type, bool single_selection,
bool resizable_columns, bool autosize_columns);
virtual ~GroupTableView();
virtual std::string GetClassName() const;
protected:
// Notification from the ListView that the selected state of an item has
// changed.
void OnSelectedStateChanged();
// Extra-painting required to draw the separator line between groups.
virtual bool ImplementPostPaint() { return true; }
virtual void PostPaint(int model_row, int column, bool selected,
const gfx::Rect& bounds, HDC device_context);
// In order to make keyboard navigation possible (using the Up and Down
// keys), we must take action when an arrow key is pressed. The reason we
// need to process this message has to do with the manner in which the focus
// needs to be set on a group item when a group is selected.
virtual void OnKeyDown(unsigned short virtual_keycode);
// Overriden to make sure rows in the same group stay grouped together.
virtual int CompareRows(int model_row1, int model_row2);
// Updates model_index_to_range_start_map_ from the model.
virtual void PrepareForSort();
private:
// Make the selection of group consistent.
void SyncSelection();
GroupTableModel* model_;
// A factory to make the selection consistent among groups.
ScopedRunnableMethodFactory<GroupTableView> sync_selection_factory_;
// Maps from model row to start of group.
std::map<int,int> model_index_to_range_start_map_;
DISALLOW_COPY_AND_ASSIGN(GroupTableView);
};
} // namespace views
#endif // VIEWS_CONTROLS_TABLE_GROUP_TABLE_VIEW_H_
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