chrome/browser/ui/panels/detached_panel_collection.h

   1 // Copyright (c) 2012 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 #ifndef CHROME_BROWSER_UI_PANELS_DETACHED_PANEL_COLLECTION_H_
   6 #define CHROME_BROWSER_UI_PANELS_DETACHED_PANEL_COLLECTION_H_
   7
   8 #include <list>
   9 #include "base/basictypes.h"
  10 #include "chrome/browser/ui/panels/panel.h"
  11 #include "chrome/browser/ui/panels/panel_collection.h"
  12 #include "ui/gfx/geometry/point.h"
  13 #include "ui/gfx/geometry/rect.h"
  14
  15 class PanelManager;
  16
  17 // This class manages a group of free-floating panels.
  18 class DetachedPanelCollection : public PanelCollection {
  19  public:
  20   typedef std::list<Panel*> Panels;
  21   typedef bool (*PanelsComparer)(Panel* panel1, Panel* panel2);
  22
  23   explicit DetachedPanelCollection(PanelManager* panel_manager);
  24   ~DetachedPanelCollection() override;
  25
  26   // PanelCollection OVERRIDES:
  27   void OnDisplayChanged() override;
  28   void RefreshLayout() override;
  29   void AddPanel(Panel* panel, PositioningMask positioning_mask) override;
  30   void RemovePanel(Panel* panel, RemovalReason reason) override;
  31   void CloseAll() override;
  32   void ResizePanelWindow(Panel* panel,
  33                          const gfx::Size& preferred_window_size) override;
  34   panel::Resizability GetPanelResizability(const Panel* panel) const override;
  35   void OnPanelResizedByMouse(Panel* panel,
  36                              const gfx::Rect& new_bounds) override;
  37   void OnPanelAttentionStateChanged(Panel* panel) override;
  38   void OnPanelTitlebarClicked(Panel* panel,
  39                               panel::ClickModifier modifier) override;
  40   void ActivatePanel(Panel* panel) override;
  41   void MinimizePanel(Panel* panel) override;
  42   void RestorePanel(Panel* panel) override;
  43   void OnMinimizeButtonClicked(Panel* panel,
  44                                panel::ClickModifier modifier) override;
  45   void OnRestoreButtonClicked(Panel* panel,
  46                               panel::ClickModifier modifier) override;
  47   bool CanShowMinimizeButton(const Panel* panel) const override;
  48   bool CanShowRestoreButton(const Panel* panel) const override;
  49   bool IsPanelMinimized(const Panel* panel) const override;
  50   bool UsesAlwaysOnTopPanels() const override;
  51   void SavePanelPlacement(Panel* panel) override;
  52   void RestorePanelToSavedPlacement() override;
  53   void DiscardSavedPanelPlacement() override;
  54   void UpdatePanelOnCollectionChange(Panel* panel) override;
  55   void OnPanelExpansionStateChanged(Panel* panel) override;
  56   void OnPanelActiveStateChanged(Panel* panel) override;
  57   gfx::Rect GetInitialPanelBounds(
  58       const gfx::Rect& requested_bounds) const override;
  59
  60   bool HasPanel(Panel* panel) const;
  61
  62   void SortPanels(PanelsComparer comparer);
  63
  64   int num_panels() const { return panels_.size(); }
  65   const Panels& panels() const { return panels_; }
  66
  67   // Returns default top-left to use for a detached panel whose position is
  68   // not specified during panel creation.
  69   gfx::Point GetDefaultPanelOrigin();
  70
  71  private:
  72   // Offset the default panel top-left position by kPanelTilePixels. Wrap
  73   // around to initial position if position goes beyond display area.
  74   void ComputeNextDefaultPanelOrigin();
  75
  76   struct PanelPlacement {
  77     Panel* panel;
  78     gfx::Point position;
  79
  80     PanelPlacement() : panel(NULL) { }
  81   };
  82
  83   PanelManager* panel_manager_;  // Weak, owns us.
  84
  85   // Collection of all panels.
  86   Panels panels_;
  87
  88   // Used to save the placement information for a panel.
  89   PanelPlacement saved_panel_placement_;
  90
  91   // Default top-left position to use for next detached panel if position is
  92   // unspecified by panel creator.
  93   gfx::Point default_panel_origin_;
  94
  95   DISALLOW_COPY_AND_ASSIGN(DetachedPanelCollection);
  96 };
  97
  98 #endif  // CHROME_BROWSER_UI_PANELS_DETACHED_PANEL_COLLECTION_H_