// Copyright 2021 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 "ash/bubble/simple_grid_layout.h" #include "ui/views/view.h" namespace ash { SimpleGridLayout::SimpleGridLayout(int column_count, int column_spacing, int row_spacing) : column_count_(column_count), column_spacing_(column_spacing), row_spacing_(row_spacing) {} SimpleGridLayout::~SimpleGridLayout() = default; views::ProposedLayout SimpleGridLayout::CalculateProposedLayout( const views::SizeBounds& size_bounds) const { views::ProposedLayout proposed_layout; if (size_bounds.is_fully_bounded()) { proposed_layout.host_size = gfx::Size(size_bounds.width().value(), size_bounds.height().value()); } else { proposed_layout.host_size = CalculatePreferredSize(); } gfx::Size size = GetChildPreferredSize(); int row = 0; int col = 0; for (auto* child : host_view()->children()) { if (!IsChildIncludedInLayout(child)) continue; int x = col * (column_spacing_ + size.width()); int y = row * (row_spacing_ + size.height()); proposed_layout.child_layouts.push_back( views::ChildLayout{child, child->GetVisible(), gfx::Rect(x, y, size.width(), size.height()), {size.width(), size.height()}}); ++col; if (col % column_count_ == 0) { ++row; col = 0; } } return proposed_layout; } void SimpleGridLayout::OnLayoutChanged() { LayoutManagerBase::OnLayoutChanged(); cached_child_preferred_size_.reset(); host_view()->SetPreferredSize(CalculatePreferredSize()); } gfx::Size SimpleGridLayout::GetChildPreferredSize() const { if (cached_child_preferred_size_) return *cached_child_preferred_size_; if (!host_view()->children().size()) return gfx::Size(); cached_child_preferred_size_ = host_view()->children()[0]->GetPreferredSize(); return *cached_child_preferred_size_; } gfx::Size SimpleGridLayout::CalculatePreferredSize() const { int total_children = 0; for (auto* child : host_view()->children()) { if (IsChildIncludedInLayout(child)) ++total_children; } // Equivalent to `ceil(children().size() / column_count_)`. int number_of_rows = (total_children + column_count_ - 1) / column_count_; if (!number_of_rows) return gfx::Size(); // `SimpleGridLayout` assumes all children have identical sizes. int child_height = GetChildPreferredSize().height(); int child_width = GetChildPreferredSize().width(); int height = (number_of_rows * (row_spacing_ + child_height)) - row_spacing_; int width = (column_count_ * (child_width + column_spacing_)) - column_spacing_; return gfx::Size(width, height); } } // namespace ash