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// Copyright (c) 2012 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 "ui/views/view_model_utils.h"
#include <algorithm>
#include "ui/views/view.h"
#include "ui/views/view_model.h"
namespace views {
namespace {
// Used in calculating ideal bounds.
int primary_axis_coordinate(ViewModelUtils::Alignment alignment,
int x,
int y) {
return alignment == ViewModelUtils::HORIZONTAL ? x : y;
}
} // namespace
// static
void ViewModelUtils::SetViewBoundsToIdealBounds(const ViewModel& model) {
for (int i = 0; i < model.view_size(); ++i)
model.view_at(i)->SetBoundsRect(model.ideal_bounds(i));
}
// static
bool ViewModelUtils::IsAtIdealBounds(const ViewModel& model) {
for (int i = 0; i < model.view_size(); ++i) {
View* view = model.view_at(i);
if (view->bounds() != model.ideal_bounds(i))
return false;
}
return true;
}
// static
int ViewModelUtils::DetermineMoveIndex(const ViewModel& model,
View* view,
Alignment alignment,
int x,
int y) {
int value = primary_axis_coordinate(alignment, x, y);
int current_index = model.GetIndexOfView(view);
DCHECK_NE(-1, current_index);
for (int i = 0; i < current_index; ++i) {
int mid_point = primary_axis_coordinate(
alignment,
model.ideal_bounds(i).x() + model.ideal_bounds(i).width() / 2,
model.ideal_bounds(i).y() + model.ideal_bounds(i).height() / 2);
if (value < mid_point)
return i;
}
if (current_index + 1 == model.view_size())
return current_index;
// For indices after the current index ignore the bounds of the view being
// dragged. This keeps the view from bouncing around as moved.
int delta = primary_axis_coordinate(
alignment,
model.ideal_bounds(current_index + 1).x() -
model.ideal_bounds(current_index).x(),
model.ideal_bounds(current_index + 1).y() -
model.ideal_bounds(current_index).y());
for (int i = current_index + 1; i < model.view_size(); ++i) {
const gfx::Rect& bounds(model.ideal_bounds(i));
int mid_point = primary_axis_coordinate(
alignment,
bounds.x() + bounds.width() / 2 - delta,
bounds.y() + bounds.height() / 2 - delta);
if (value < mid_point)
return i - 1;
}
return model.view_size() - 1;
}
} // namespace views
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