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// Copyright (c) 2010 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/image_view.h"
#include "base/logging.h"
#include "base/utf_string_conversions.h"
#include "ui/base/accessibility/accessible_view_state.h"
#include "ui/gfx/canvas.h"
#include "ui/gfx/insets.h"
namespace views {
ImageView::ImageView()
: image_size_set_(false),
horiz_alignment_(CENTER),
vert_alignment_(CENTER) {
}
ImageView::~ImageView() {
}
void ImageView::SetImage(const SkBitmap& bm) {
image_ = bm;
PreferredSizeChanged();
SchedulePaint();
}
void ImageView::SetImage(SkBitmap* bm) {
if (bm) {
SetImage(*bm);
} else {
SkBitmap t;
SetImage(t);
}
}
const SkBitmap& ImageView::GetImage() {
return image_;
}
void ImageView::SetImageSize(const gfx::Size& image_size) {
image_size_set_ = true;
image_size_ = image_size;
PreferredSizeChanged();
}
bool ImageView::GetImageSize(gfx::Size* image_size) {
DCHECK(image_size);
if (image_size_set_)
*image_size = image_size_;
return image_size_set_;
}
gfx::Rect ImageView::GetImageBounds() const {
gfx::Size image_size(image_size_set_ ?
image_size_ : gfx::Size(image_.width(), image_.height()));
return gfx::Rect(ComputeImageOrigin(image_size), image_size);
}
void ImageView::ResetImageSize() {
image_size_set_ = false;
}
gfx::Size ImageView::GetPreferredSize() {
gfx::Insets insets = GetInsets();
if (image_size_set_) {
gfx::Size image_size;
GetImageSize(&image_size);
image_size.Enlarge(insets.width(), insets.height());
return image_size;
}
return gfx::Size(image_.width() + insets.width(),
image_.height() + insets.height());
}
gfx::Point ImageView::ComputeImageOrigin(const gfx::Size& image_size) const {
gfx::Insets insets = GetInsets();
int x;
// In order to properly handle alignment of images in RTL locales, we need
// to flip the meaning of trailing and leading. For example, if the
// horizontal alignment is set to trailing, then we'll use left alignment for
// the image instead of right alignment if the UI layout is RTL.
Alignment actual_horiz_alignment = horiz_alignment_;
if (base::i18n::IsRTL() && (horiz_alignment_ != CENTER))
actual_horiz_alignment = (horiz_alignment_ == LEADING) ? TRAILING : LEADING;
switch (actual_horiz_alignment) {
case LEADING: x = insets.left(); break;
case TRAILING: x = width() - insets.right() - image_size.width(); break;
case CENTER: x = (width() - image_size.width()) / 2; break;
default: NOTREACHED(); x = 0; break;
}
int y;
switch (vert_alignment_) {
case LEADING: y = insets.top(); break;
case TRAILING: y = height() - insets.bottom() - image_size.height(); break;
case CENTER: y = (height() - image_size.height()) / 2; break;
default: NOTREACHED(); y = 0; break;
}
return gfx::Point(x, y);
}
void ImageView::OnPaint(gfx::Canvas* canvas) {
View::OnPaint(canvas);
if (image_.empty())
return;
gfx::Rect image_bounds(GetImageBounds());
if (image_bounds.IsEmpty())
return;
if (image_bounds.size() != gfx::Size(image_.width(), image_.height())) {
// Resize case
image_.buildMipMap(false);
SkPaint paint;
paint.setFilterBitmap(true);
canvas->DrawBitmapInt(image_, 0, 0, image_.width(), image_.height(),
image_bounds.x(), image_bounds.y(), image_bounds.width(),
image_bounds.height(), true, paint);
} else {
canvas->DrawBitmapInt(image_, image_bounds.x(), image_bounds.y());
}
}
void ImageView::GetAccessibleState(ui::AccessibleViewState* state) {
state->role = ui::AccessibilityTypes::ROLE_GRAPHIC;
state->name = tooltip_text_;
}
void ImageView::SetHorizontalAlignment(Alignment ha) {
if (ha != horiz_alignment_) {
horiz_alignment_ = ha;
SchedulePaint();
}
}
ImageView::Alignment ImageView::GetHorizontalAlignment() {
return horiz_alignment_;
}
void ImageView::SetVerticalAlignment(Alignment va) {
if (va != vert_alignment_) {
vert_alignment_ = va;
SchedulePaint();
}
}
ImageView::Alignment ImageView::GetVerticalAlignment() {
return vert_alignment_;
}
void ImageView::SetTooltipText(const std::wstring& tooltip) {
tooltip_text_ = WideToUTF16Hack(tooltip);
}
std::wstring ImageView::GetTooltipText() {
return UTF16ToWideHack(tooltip_text_);
}
bool ImageView::GetTooltipText(const gfx::Point& p, std::wstring* tooltip) {
if (tooltip_text_.empty())
return false;
*tooltip = GetTooltipText();
return true;
}
} // namespace views
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