[Win] App launcher drag/drop.

ui/app_list/views/app_list_item_view.cc

 // 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/app_list/views/app_list_item_view.h"
 
 #include <algorithm>
 
 #include "base/strings/utf_string_conversions.h"
 #include "grit/ui_resources.h"
 #include "ui/app_list/app_list_constants.h"
 #include "ui/app_list/app_list_item_model.h"
 #include "ui/app_list/views/apps_grid_view.h"
 #include "ui/app_list/views/cached_label.h"
 #include "ui/base/accessibility/accessible_view_state.h"
 #include "ui/base/animation/throb_animation.h"
+#include "ui/base/dragdrop/drag_utils.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/compositor/layer.h"
 #include "ui/compositor/scoped_layer_animation_settings.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/font.h"
 #include "ui/gfx/image/image_skia_operations.h"
 #include "ui/gfx/transform_util.h"
 #include "ui/views/controls/image_view.h"
 #include "ui/views/controls/label.h"
 #include "ui/views/controls/menu/menu_item_view.h"
 #include "ui/views/controls/menu/menu_runner.h"
+#include "ui/views/drag_controller.h"
 
 namespace app_list {
 
 namespace {
 
 const int kTopBottomPadding = 10;
 const int kTopPadding = 20;
 const int kIconTitleSpacing = 7;
 const int kProgressBarHorizontalPadding = 12;
 const int kProgressBarVerticalPadding = 4;
@@ skipping 127 matching lines @@
 
 void AppListItemView::OnMouseDragTimer() {
   DCHECK(apps_grid_view_->IsDraggedView(this));
   SetUIState(UI_STATE_DRAGGING);
 }
 
 void AppListItemView::Prerender() {
   title_->PaintToBackingImage();
 }
 
+gfx::ImageSkia AppListItemView::GetDragImage() {
+  gfx::Canvas canvas(size(), ui::SCALE_FACTOR_100P, false /* is_opaque */);
+  gfx::Rect bounds(0, 0, size().width(), size().height());

[xiyuan, 2013/06/19 05:41:38]

nit: gfx::Rect bounds(size);

[koz (OOO until 15th September), 2013/06/19 07:55:08]

Done.

+  LOG(ERROR) << bounds.ToString();

[xiyuan, 2013/06/19 05:41:38]

Get rid of debugging log.

[koz (OOO until 15th September), 2013/06/19 07:55:08]

Done.

+  canvas.FillRect(bounds, SkColorSetARGB(0, 0, 0, 0),
+                  SkXfermode::kSrc_Mode);

[xiyuan, 2013/06/19 05:41:38]

nit: canvas.DrawColor(SK_ColorTRANSPARENT);

[koz (OOO until 15th September), 2013/06/19 07:55:08]

Done.

+  PaintChildren(&canvas);
+
+  return gfx::ImageSkia(canvas.ExtractImageRep());
+}
+
 void AppListItemView::ItemIconChanged() {
   UpdateIcon();
 }
 
 void AppListItemView::ItemTitleChanged() {
   title_->SetText(UTF8ToUTF16(model_->title()));
   title_->Invalidate();
   Layout();
 }
 
@@ skipping 149 matching lines @@
   return CustomButton::OnKeyPressed(event);
 }
 
 void AppListItemView::OnMouseReleased(const ui::MouseEvent& event) {
   CustomButton::OnMouseReleased(event);
   apps_grid_view_->EndDrag(false);
   mouse_drag_timer_.Stop();
   SetUIState(UI_STATE_NORMAL);
 }
 
-void AppListItemView::OnMouseCaptureLost() {

[xiyuan, 2013/06/19 05:41:38]

Why don't we need this?

[koz (OOO until 15th September), 2013/06/19 07:55:08]

Ah, we do on CROS, but it causes problems on Windows. I've added a comment and
an #ifdef here.

-  CustomButton::OnMouseCaptureLost();
-  apps_grid_view_->EndDrag(true);
-  mouse_drag_timer_.Stop();
-  SetUIState(UI_STATE_NORMAL);
-}
-
 bool AppListItemView::OnMouseDragged(const ui::MouseEvent& event) {
   CustomButton::OnMouseDragged(event);
-  apps_grid_view_->UpdateDrag(this, AppsGridView::MOUSE, event);
+  apps_grid_view_->UpdateDragFromItem(AppsGridView::MOUSE, event);
 
   // Shows dragging UI when it's confirmed without waiting for the timer.
   if (ui_state_ != UI_STATE_DRAGGING &&
       apps_grid_view_->dragging() &&
       apps_grid_view_->IsDraggedView(this)) {
     mouse_drag_timer_.Stop();
     SetUIState(UI_STATE_DRAGGING);
   }
   return true;
 }
 
 void AppListItemView::OnGestureEvent(ui::GestureEvent* event) {
   switch (event->type()) {
     case ui::ET_GESTURE_SCROLL_BEGIN:
       if (touch_dragging_) {
         apps_grid_view_->InitiateDrag(this, AppsGridView::TOUCH, *event);
         event->SetHandled();
       }
       break;
     case ui::ET_GESTURE_SCROLL_UPDATE:
       if (touch_dragging_) {
-        apps_grid_view_->UpdateDrag(this, AppsGridView::TOUCH, *event);
+        apps_grid_view_->UpdateDragFromItem(AppsGridView::TOUCH, *event);
         event->SetHandled();
       }
       break;
     case ui::ET_GESTURE_SCROLL_END:
     case ui::ET_SCROLL_FLING_START:
       if (touch_dragging_) {
         SetTouchDragging(false);
         apps_grid_view_->EndDrag(false);
         event->SetHandled();
       }
       break;
     case ui::ET_GESTURE_LONG_PRESS:
       if (!apps_grid_view_->has_dragged_view())
         SetTouchDragging(true);
       event->SetHandled();
       break;
     case ui::ET_GESTURE_LONG_TAP:
     case ui::ET_GESTURE_END:
       if (touch_dragging_)
         SetTouchDragging(false);
       break;
     default:
       break;
   }
   if (!event->handled())
     CustomButton::OnGestureEvent(event);
 }
 
 }  // namespace app_list