view_model_utils.cc revision 5821806d5e7f356e8fa4b058a389a808ea183019
1// Copyright (c) 2012 The Chromium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5#include "ui/views/view_model_utils.h" 6 7#include <algorithm> 8 9#include "ui/views/view.h" 10#include "ui/views/view_model.h" 11 12namespace views { 13 14namespace { 15 16// Used in calculating ideal bounds. 17int primary_axis_coordinate(ViewModelUtils::Alignment alignment, 18 int x, 19 int y) { 20 return alignment == ViewModelUtils::HORIZONTAL ? x : y; 21} 22 23} // namespace 24 25// static 26void ViewModelUtils::SetViewBoundsToIdealBounds(const ViewModel& model) { 27 for (int i = 0; i < model.view_size(); ++i) 28 model.view_at(i)->SetBoundsRect(model.ideal_bounds(i)); 29} 30 31// static 32bool ViewModelUtils::IsAtIdealBounds(const ViewModel& model) { 33 for (int i = 0; i < model.view_size(); ++i) { 34 View* view = model.view_at(i); 35 if (view->bounds() != model.ideal_bounds(i)) 36 return false; 37 } 38 return true; 39} 40 41// static 42int ViewModelUtils::DetermineMoveIndex(const ViewModel& model, 43 View* view, 44 Alignment alignment, 45 int x, 46 int y) { 47 int value = primary_axis_coordinate(alignment, x, y); 48 int current_index = model.GetIndexOfView(view); 49 DCHECK_NE(-1, current_index); 50 for (int i = 0; i < current_index; ++i) { 51 int mid_point = primary_axis_coordinate( 52 alignment, 53 model.ideal_bounds(i).x() + model.ideal_bounds(i).width() / 2, 54 model.ideal_bounds(i).y() + model.ideal_bounds(i).height() / 2); 55 if (value < mid_point) 56 return i; 57 } 58 59 if (current_index + 1 == model.view_size()) 60 return current_index; 61 62 // For indices after the current index ignore the bounds of the view being 63 // dragged. This keeps the view from bouncing around as moved. 64 int delta = primary_axis_coordinate( 65 alignment, 66 model.ideal_bounds(current_index + 1).x() - 67 model.ideal_bounds(current_index).x(), 68 model.ideal_bounds(current_index + 1).y() - 69 model.ideal_bounds(current_index).y()); 70 for (int i = current_index + 1; i < model.view_size(); ++i) { 71 const gfx::Rect& bounds(model.ideal_bounds(i)); 72 int mid_point = primary_axis_coordinate( 73 alignment, 74 bounds.x() + bounds.width() / 2 - delta, 75 bounds.y() + bounds.height() / 2 - delta); 76 if (value < mid_point) 77 return i - 1; 78 } 79 return model.view_size() - 1; 80} 81 82} // namespace views 83