Ash:Shelf - Cleanup of Alternate Shelf (part 1)

ash/shelf/app_list_button.cc

 // Copyright 2013 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/shelf/app_list_button.h"
 
-#include <vector>
-
 #include "ash/ash_constants.h"
+#include "ash/ash_switches.h"
+#include "ash/launcher/launcher_types.h"
+#include "ash/shelf/shelf_button.h"
 #include "ash/shelf/shelf_button_host.h"
-#include "ash/shelf/shelf_constants.h"
+#include "ash/shelf/shelf_layout_manager.h"
+#include "ash/shelf/shelf_widget.h"
+#include "ash/shell.h"
 #include "grit/ash_resources.h"
 #include "grit/ash_strings.h"
 #include "ui/base/accessibility/accessible_view_state.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/compositor/layer.h"
 #include "ui/compositor/layer_animation_element.h"
 #include "ui/compositor/layer_animation_sequence.h"
 #include "ui/compositor/scoped_layer_animation_settings.h"
+#include "ui/gfx/canvas.h"
+#include "ui/gfx/image/image_skia_operations.h"
+#include "ui/views/controls/button/image_button.h"
 #include "ui/views/painter.h"
 
 namespace ash {
 namespace internal {
 
-const int kAnimationDurationInMs = 600;
-const float kAnimationOpacity[] = { 1.0f, 0.4f, 1.0f };
+// static
+const int AppListButton::kImageBoundsSize = 7;
+
 
 AppListButton::AppListButton(views::ButtonListener* listener,
-                             ShelfButtonHost* host)
+                             ShelfButtonHost* host,
+                             ShelfWidget* shelf_widget)
     : views::ImageButton(listener),
-      host_(host) {
-  ResourceBundle& rb = ResourceBundle::GetSharedInstance();
-  SetImage(
-      views::CustomButton::STATE_NORMAL,
-      rb.GetImageNamed(IDR_AURA_LAUNCHER_ICON_APPLIST).ToImageSkia());
-  SetImage(
-      views::CustomButton::STATE_HOVERED,
-      rb.GetImageNamed(IDR_AURA_LAUNCHER_ICON_APPLIST_HOT).
-          ToImageSkia());
-  SetImage(
-      views::CustomButton::STATE_PRESSED,
-      rb.GetImageNamed(IDR_AURA_LAUNCHER_ICON_APPLIST_PUSHED).
-          ToImageSkia());
+      host_(host),
+      shelf_widget_(shelf_widget) {
   SetAccessibleName(l10n_util::GetStringUTF16(IDS_AURA_APP_LIST_TITLE));
-  SetSize(gfx::Size(kShelfPreferredSize, kShelfPreferredSize));
-  SetImageAlignment(ImageButton::ALIGN_CENTER, ImageButton::ALIGN_TOP);
+  SetSize(gfx::Size(ShelfLayoutManager::kShelfSize,
+                    ShelfLayoutManager::kShelfSize));
   SetFocusPainter(views::Painter::CreateSolidFocusPainter(
                       kFocusBorderColor, gfx::Insets(1, 1, 1, 1)));
 }
 
 AppListButton::~AppListButton() {
 }
 
-void AppListButton::StartLoadingAnimation() {
-  layer()->GetAnimator()->StopAnimating();
-
-  scoped_ptr<ui::LayerAnimationSequence> opacity_sequence(
-      new ui::LayerAnimationSequence());
-
-  opacity_sequence->set_is_cyclic(true);
-
-  for (size_t i = 0; i < arraysize(kAnimationOpacity); ++i) {
-    opacity_sequence->AddElement(
-        ui::LayerAnimationElement::CreateOpacityElement(
-            kAnimationOpacity[i],
-            base::TimeDelta::FromMilliseconds(kAnimationDurationInMs)));
-  }
-
-  opacity_sequence->AddElement(
-      ui::LayerAnimationElement::CreatePauseElement(
-          ui::LayerAnimationElement::OPACITY,
-          base::TimeDelta::FromMilliseconds(kAnimationDurationInMs)));
-
-  // LayerAnimator takes ownership of the sequences.
-  layer()->GetAnimator()->ScheduleAnimation(opacity_sequence.release());
-}
-
-void AppListButton::StopLoadingAnimation() {
-  layer()->GetAnimator()->StopAnimating();
-
-  ui::ScopedLayerAnimationSettings settings(layer()->GetAnimator());
-  settings.SetTransitionDuration(
-      base::TimeDelta::FromMilliseconds(kAnimationDurationInMs));
-  layer()->SetOpacity(1.0f);
-  layer()->SetTransform(gfx::Transform());
-}
-
 bool AppListButton::OnMousePressed(const ui::MouseEvent& event) {
   ImageButton::OnMousePressed(event);
   host_->PointerPressedOnButton(this, ShelfButtonHost::MOUSE, event);
   return true;
 }
 
 void AppListButton::OnMouseReleased(const ui::MouseEvent& event) {
   ImageButton::OnMouseReleased(event);
   host_->PointerReleasedOnButton(this, ShelfButtonHost::MOUSE, false);
 }
@@ skipping 17 matching lines @@
 void AppListButton::OnMouseEntered(const ui::MouseEvent& event) {
   ImageButton::OnMouseEntered(event);
   host_->MouseEnteredButton(this);
 }
 
 void AppListButton::OnMouseExited(const ui::MouseEvent& event) {
   ImageButton::OnMouseExited(event);
   host_->MouseExitedButton(this);
 }
 
-void AppListButton::GetAccessibleState(ui::AccessibleViewState* state) {
+void AppListButton::OnGestureEvent(ui::GestureEvent* event) {
+  switch (event->type()) {
+   case ui::ET_GESTURE_SCROLL_BEGIN:
+     host_->PointerPressedOnButton(this, ShelfButtonHost::TOUCH, *event);
+     event->SetHandled();
+     return;
+   case ui::ET_GESTURE_SCROLL_UPDATE:
+     host_->PointerDraggedOnButton(this, ShelfButtonHost::TOUCH, *event);
+     event->SetHandled();
+     return;
+   case ui::ET_GESTURE_SCROLL_END:
+   case ui::ET_SCROLL_FLING_START:
+     host_->PointerReleasedOnButton(this, ShelfButtonHost::TOUCH, false);
+     event->SetHandled();
+     return;
+   default:
+     ImageButton::OnGestureEvent(event);
+     return;
+  }
+}
+
+void AppListButton::OnPaint(gfx::Canvas* canvas) {
+  // Call the base class first to paint any background/borders.
+  View::OnPaint(canvas);
+
+  int background_image_id = 0;
+  if (Shell::GetInstance()->GetAppListTargetVisibility()) {
+    background_image_id = IDR_AURA_NOTIFICATION_BACKGROUND_PRESSED;
+  } else {
+    if (shelf_widget_->GetDimsShelf())
+      background_image_id = IDR_AURA_NOTIFICATION_BACKGROUND_ON_BLACK;
+    else
+      background_image_id = IDR_AURA_NOTIFICATION_BACKGROUND_NORMAL;
+  }
+  ResourceBundle& rb = ResourceBundle::GetSharedInstance();
+  const gfx::ImageSkia* background_image =
+      rb.GetImageNamed(background_image_id).ToImageSkia();
+  const gfx::ImageSkia* forground_image =
+      rb.GetImageNamed(IDR_AURA_LAUNCHER_ICON_APPLIST_ALTERNATE).ToImageSkia();
+
+  gfx::Rect contents_bounds = GetContentsBounds();
+  gfx::Rect background_bounds, forground_bounds;
+
+  ShelfAlignment alignment = shelf_widget_->GetAlignment();
+  background_bounds.set_size(background_image->size());
+  if (alignment == SHELF_ALIGNMENT_LEFT) {
+    background_bounds.set_x(contents_bounds.width() -
+        ShelfLayoutManager::kShelfItemInset - background_image->width());
+    background_bounds.set_y(contents_bounds.y() +
+        (contents_bounds.height() - background_image->height()) / 2);
+  } else if(alignment == SHELF_ALIGNMENT_RIGHT) {
+    background_bounds.set_x(ShelfLayoutManager::kShelfItemInset);
+    background_bounds.set_y(contents_bounds.y() +
+        (contents_bounds.height() - background_image->height()) / 2);
+  } else {
+    background_bounds.set_y(ShelfLayoutManager::kShelfItemInset);
+    background_bounds.set_x(contents_bounds.x() +
+        (contents_bounds.width() - background_image->width()) / 2);
+  }
+
+  forground_bounds.set_size(forground_image->size());
+  forground_bounds.set_x(background_bounds.x() +
+      std::max(0,
+          (background_bounds.width() - forground_bounds.width()) / 2));
+  forground_bounds.set_y(background_bounds.y() +
+      std::max(0,
+          (background_bounds.height() - forground_bounds.height()) / 2));
+
+  canvas->DrawImageInt(*background_image,
+                       background_bounds.x(),
+                       background_bounds.y());
+  canvas->DrawImageInt(*forground_image,
+                       forground_bounds.x(),
+                       forground_bounds.y());
+
+  views::Painter::PaintFocusPainter(this, canvas, focus_painter());
+}
+
+void AppListButton::GetAccessibleState(
+    ui::AccessibleViewState* state) {
   state->role = ui::AccessibilityTypes::ROLE_PUSHBUTTON;
   state->name = host_->GetAccessibleName(this);
 }
 
 }  // namespace internal
 }  // namespace ash