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// Copyright (c) 2009 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/native_view_host.h"
#include "views/widget/widget.h"
#include "base/logging.h"
namespace views {
NativeViewHost::NativeViewHost()
: native_view_(NULL),
installed_clip_(false),
fast_resize_(false),
focus_view_(NULL) {
// The native widget is placed relative to the root. As such, we need to
// know when the position of any ancestor changes, or our visibility relative
// to other views changed as it'll effect our position relative to the root.
SetNotifyWhenVisibleBoundsInRootChanges(true);
}
NativeViewHost::~NativeViewHost() {
}
gfx::Size NativeViewHost::GetPreferredSize() {
return preferred_size_;
}
void NativeViewHost::SetPreferredSize(const gfx::Size& size) {
preferred_size_ = size;
PreferredSizeChanged();
}
void NativeViewHost::Layout() {
if (!native_view_)
return;
// Since widgets know nothing about the View hierarchy (they are direct
// children of the Widget that hosts our View hierarchy) they need to be
// positioned in the coordinate system of the Widget, not the current
// view.
gfx::Point top_left;
ConvertPointToWidget(this, &top_left);
gfx::Rect vis_bounds = GetVisibleBounds();
bool visible = !vis_bounds.IsEmpty();
if (visible && !fast_resize_) {
if (vis_bounds.size() != size()) {
// Only a portion of the Widget is really visible.
int x = vis_bounds.x();
int y = vis_bounds.y();
InstallClip(x, y, vis_bounds.width(), vis_bounds.height());
installed_clip_ = true;
} else if (installed_clip_) {
// The whole widget is visible but we installed a clip on the widget,
// uninstall it.
UninstallClip();
installed_clip_ = false;
}
}
if (visible) {
ShowWidget(top_left.x(), top_left.y(), width(), height());
} else {
HideWidget();
}
}
void NativeViewHost::VisibilityChanged(View* starting_from, bool is_visible) {
Layout();
}
void NativeViewHost::VisibleBoundsInRootChanged() {
Layout();
}
} // namespace views
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