ash/wm/panels/attached_panel_window_targeter.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ash/wm/panels/attached_panel_window_targeter.h"
   6
   7 #include "ash/shelf/shelf.h"
   8 #include "ash/shell.h"
   9 #include "ash/wm/panels/panel_layout_manager.h"
  10
  11 namespace ash {
  12
  13 AttachedPanelWindowTargeter::AttachedPanelWindowTargeter(
  14     aura::Window* container,
  15     const gfx::Insets& default_mouse_extend,
  16     const gfx::Insets& default_touch_extend,
  17     PanelLayoutManager* panel_layout_manager)
  18     : ::wm::EasyResizeWindowTargeter(container,
  19                                      default_mouse_extend,
  20                                      default_touch_extend),
  21       panel_container_(container),
  22       panel_layout_manager_(panel_layout_manager),
  23       default_touch_extend_(default_touch_extend) {
  24   Shell::GetInstance()->AddShellObserver(this);
  25 }
  26
  27 AttachedPanelWindowTargeter::~AttachedPanelWindowTargeter() {
  28   Shell::GetInstance()->RemoveShellObserver(this);
  29 }
  30
  31 void AttachedPanelWindowTargeter::OnShelfCreatedForRootWindow(
  32     aura::Window* root_window) {
  33   UpdateTouchExtend(root_window);
  34 }
  35
  36 void AttachedPanelWindowTargeter::OnShelfAlignmentChanged(
  37     aura::Window* root_window) {
  38   // Don't update the touch insets if the shelf has not yet been created.
  39   if (!panel_layout_manager_->shelf())
  40     return;
  41
  42   UpdateTouchExtend(root_window);
  43 }
  44
  45 void AttachedPanelWindowTargeter::UpdateTouchExtend(aura::Window* root_window) {
  46   // Only update the touch insets for panels if they are attached to the shelf
  47   // in |root_window|.
  48   if (panel_container_->GetRootWindow() != root_window)
  49     return;
  50
  51   DCHECK(panel_layout_manager_->shelf());
  52
  53   gfx::Insets touch(default_touch_extend_);
  54   switch (panel_layout_manager_->shelf()->alignment()) {
  55     case SHELF_ALIGNMENT_BOTTOM:
  56       touch = gfx::Insets(touch.top(), touch.left(), 0, touch.right());
  57       break;
  58     case SHELF_ALIGNMENT_LEFT:
  59       touch = gfx::Insets(touch.top(), 0, touch.bottom(), touch.right());
  60       break;
  61     case SHELF_ALIGNMENT_RIGHT:
  62       touch = gfx::Insets(touch.top(), touch.left(), touch.bottom(), 0);
  63       break;
  64     case SHELF_ALIGNMENT_TOP:
  65       touch = gfx::Insets(0, touch.left(), touch.bottom(), touch.right());
  66       break;
  67     default:
  68       NOTREACHED();
  69       return;
  70   }
  71
  72   set_touch_extend(touch);
  73 }
  74
  75 }  // namespace ash