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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 "ash/launcher/app_launcher_button.h"
#include <algorithm>
#include "ash/launcher/launcher_button_host.h"
#include "ui/base/accessibility/accessible_view_state.h"
#include "ui/gfx/canvas_skia.h"
namespace ash {
namespace internal {
const int kImageSize = 32;
AppLauncherButton::AppLauncherButton(views::ButtonListener* listener,
LauncherButtonHost* host)
: views::ImageButton(listener),
host_(host) {
SetImageAlignment(views::ImageButton::ALIGN_CENTER,
views::ImageButton::ALIGN_MIDDLE);
set_accessibility_focusable(true);
}
AppLauncherButton::~AppLauncherButton() {
}
void AppLauncherButton::SetAppImage(const SkBitmap& image) {
if (image.empty()) {
// TODO: need an empty image.
SetImage(BS_NORMAL, &image);
return;
}
// Resize the image maintaining our aspect ratio.
int pref = kImageSize;
float aspect_ratio =
static_cast<float>(image.width()) / static_cast<float>(image.height());
int height = pref;
int width = static_cast<int>(aspect_ratio * height);
if (width > pref) {
width = pref;
height = static_cast<int>(width / aspect_ratio);
}
if (width == image.width() && height == image.height()) {
SetImage(BS_NORMAL, &image);
return;
}
gfx::CanvasSkia canvas(gfx::Size(width, height), false);
canvas.DrawBitmapInt(image, 0, 0, image.width(), image.height(),
0, 0, width, height, false);
SkBitmap resized_image(canvas.ExtractBitmap());
SetImage(BS_NORMAL, &resized_image);
}
bool AppLauncherButton::OnMousePressed(const views::MouseEvent& event) {
ImageButton::OnMousePressed(event);
host_->MousePressedOnButton(this, event);
return true;
}
void AppLauncherButton::OnMouseReleased(const views::MouseEvent& event) {
host_->MouseReleasedOnButton(this, false);
ImageButton::OnMouseReleased(event);
}
void AppLauncherButton::OnMouseCaptureLost() {
host_->MouseReleasedOnButton(this, true);
ImageButton::OnMouseCaptureLost();
}
bool AppLauncherButton::OnMouseDragged(const views::MouseEvent& event) {
ImageButton::OnMouseDragged(event);
host_->MouseDraggedOnButton(this, event);
return true;
}
void AppLauncherButton::OnMouseExited(const views::MouseEvent& event) {
ImageButton::OnMouseExited(event);
host_->MouseExitedButton(this);
}
void AppLauncherButton::GetAccessibleState(ui::AccessibleViewState* state) {
state->role = ui::AccessibilityTypes::ROLE_PUSHBUTTON;
state->name = host_->GetAccessibleName(this);
}
} // namespace internal
} // namespace ash
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