views: Move table and tree directories to ui/views/controls/.

views/controls/table/group_table_view.cc

-// Copyright (c) 2011 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.
-
-#include "views/controls/table/group_table_view.h"
-
-#include "base/bind.h"
-#include "base/compiler_specific.h"
-#include "base/message_loop.h"
-#include "ui/gfx/canvas.h"
-
-namespace views {
-
-const COLORREF kSeparatorLineColor = RGB(208, 208, 208);
-const int kSeparatorLineThickness = 1;
-
-const char GroupTableView::kViewClassName[] = "views/GroupTableView";
-
-GroupTableView::GroupTableView(GroupTableModel* model,
-                               const std::vector<ui::TableColumn>& columns,
-                               TableTypes table_type,
-                               bool single_selection,
-                               bool resizable_columns,
-                               bool autosize_columns,
-                               bool draw_group_separators)
-    : TableView(model, columns, table_type, false, resizable_columns,
-                autosize_columns),
-    model_(model),
-    draw_group_separators_(draw_group_separators),
-    ALLOW_THIS_IN_INITIALIZER_LIST(sync_selection_factory_(this)) {
-}
-
-GroupTableView::~GroupTableView() {
-}
-
-void GroupTableView::SyncSelection() {
-  int index = 0;
-  int row_count = model_->RowCount();
-  GroupRange group_range;
-  while (index < row_count) {
-    model_->GetGroupRangeForItem(index, &group_range);
-    if (group_range.length == 1) {
-      // No synching required for single items.
-      index++;
-    }  else {
-      // We need to select the group if at least one item is selected.
-      bool should_select = false;
-      for (int i = group_range.start;
-           i < group_range.start + group_range.length; ++i) {
-        if (IsItemSelected(i)) {
-          should_select = true;
-          break;
-        }
-      }
-      if (should_select) {
-        for (int i = group_range.start;
-             i < group_range.start + group_range.length; ++i) {
-          SetSelectedState(i, true);
-        }
-      }
-      index += group_range.length;
-    }
-  }
-}
-
-bool GroupTableView::OnKeyDown(ui::KeyboardCode virtual_keycode) {
-  // In a list view, multiple items can be selected but only one item has the
-  // focus. This creates a problem when the arrow keys are used for navigating
-  // between items in the list view. An example will make this more clear:
-  //
-  // Suppose we have 5 items in the list view, and three of these items are
-  // part of one group:
-  //
-  // Index0: ItemA (No Group)
-  // Index1: ItemB (GroupX)
-  // Index2: ItemC (GroupX)
-  // Index3: ItemD (GroupX)
-  // Index4: ItemE (No Group)
-  //
-  // When GroupX is selected (say, by clicking on ItemD with the mouse),
-  // GroupTableView::SyncSelection() will make sure ItemB, ItemC and ItemD are
-  // selected. Also, the item with the focus will be ItemD (simply because
-  // this is the item the user happened to click on). If then the UP arrow is
-  // pressed once, the focus will be switched to ItemC and not to ItemA and the
-  // end result is that we are stuck in GroupX even though the intention was to
-  // switch to ItemA.
-  //
-  // For that exact reason, we need to set the focus appropriately when we
-  // detect that one of the arrow keys is pressed. Thus, when it comes time
-  // for the list view control to actually switch the focus, the right item
-  // will be selected.
-  if ((virtual_keycode != ui::VKEY_UP) &&
-      (virtual_keycode != ui::VKEY_DOWN)) {
-    return TableView::OnKeyDown(virtual_keycode);
-  }
-
-  // We start by finding the index of the item with the focus. If no item
-  // currently has the focus, then this routine doesn't do anything.
-  int focused_index;
-  int row_count = model_->RowCount();
-  for (focused_index = 0; focused_index < row_count; focused_index++) {
-    if (ItemHasTheFocus(focused_index)) {
-      break;
-    }
-  }
-
-  if (focused_index == row_count)
-    return false;
-
-  DCHECK_LT(focused_index, row_count);
-
-  // Nothing to do if the item which has the focus is not part of a group.
-  GroupRange group_range;
-  model_->GetGroupRangeForItem(focused_index, &group_range);
-  if (group_range.length == 1)
-    return false;
-
-  // If the user pressed the UP key, then the focus should be set to the
-  // topmost element in the group. If the user pressed the DOWN key, the focus
-  // should be set to the bottommost element.
-  if (virtual_keycode == ui::VKEY_UP) {
-    SetFocusOnItem(group_range.start);
-  } else {
-    DCHECK_EQ(virtual_keycode, ui::VKEY_DOWN);
-    SetFocusOnItem(group_range.start + group_range.length - 1);
-  }
-
-  return false;
-}
-
-void GroupTableView::PrepareForSort() {
-  GroupRange range;
-  int row_count = RowCount();
-  model_index_to_range_start_map_.clear();
-  for (int model_row = 0; model_row < row_count;) {
-    model_->GetGroupRangeForItem(model_row, &range);
-    for (int range_counter = 0; range_counter < range.length; range_counter++)
-      model_index_to_range_start_map_[range_counter + model_row] = model_row;
-    model_row += range.length;
-  }
-}
-
-int GroupTableView::CompareRows(int model_row1, int model_row2) {
-  int range1 = model_index_to_range_start_map_[model_row1];
-  int range2 = model_index_to_range_start_map_[model_row2];
-  if (range1 == range2) {
-    // The two rows are in the same group, sort so that items in the same group
-    // always appear in the same order.
-    return model_row1 - model_row2;
-  }
-  // Sort by the first entry of each of the groups.
-  return TableView::CompareRows(range1, range2);
-}
-
-void GroupTableView::OnSelectedStateChanged() {
-  // The goal is to make sure all items for a same group are in a consistent
-  // state in term of selection. When a user clicks an item, several selection
-  // messages are sent, possibly including unselecting all currently selected
-  // items. For that reason, we post a task to be performed later, after all
-  // selection messages have been processed. In the meantime we just ignore all
-  // selection notifications.
-  if (!sync_selection_factory_.HasWeakPtrs()) {
-    MessageLoop::current()->PostTask(
-        FROM_HERE,
-        base::Bind(&GroupTableView::SyncSelection,
-                   sync_selection_factory_.GetWeakPtr()));
-  }
-  TableView::OnSelectedStateChanged();
-}
-
-// Draws the line separator betweens the groups.
-void GroupTableView::PostPaint(int model_row, int column, bool selected,
-                               const gfx::Rect& bounds, HDC hdc) {
-  if (!draw_group_separators_)
-    return;
-
-  GroupRange group_range;
-  model_->GetGroupRangeForItem(model_row, &group_range);
-
-  // We always paint a vertical line at the end of the last cell.
-  HPEN hPen = CreatePen(PS_SOLID, kSeparatorLineThickness, kSeparatorLineColor);
-  HPEN hPenOld = (HPEN) SelectObject(hdc, hPen);
-  int x = bounds.right() - kSeparatorLineThickness;
-  MoveToEx(hdc, x, bounds.y(), NULL);
-  LineTo(hdc, x, bounds.bottom());
-
-  // We paint a separator line after the last item of a group.
-  if (model_row == (group_range.start + group_range.length - 1)) {
-    int y = bounds.bottom() - kSeparatorLineThickness;
-    MoveToEx(hdc, 0, y, NULL);
-    LineTo(hdc, bounds.width(), y);
-  }
-  SelectObject(hdc, hPenOld);
-  DeleteObject(hPen);
-}
-
-std::string GroupTableView::GetClassName() const {
-  return kViewClassName;
-}
-
-}  // namespace views