chrome/browser/ui/views/tabs/dragged_tab_view.h

   1 // Copyright (c) 2011 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_VIEWS_TABS_DRAGGED_TAB_VIEW_H_
   6 #define CHROME_BROWSER_UI_VIEWS_TABS_DRAGGED_TAB_VIEW_H_
   7
   8 #include <vector>
   9
  10 #include "build/build_config.h"
  11 #include "ui/gfx/point.h"
  12 #include "ui/gfx/rect.h"
  13 #include "ui/gfx/size.h"
  14 #include "ui/views/view.h"
  15
  16 class NativeViewPhotobooth;
  17
  18 class DraggedTabView : public views::View {
  19  public:
  20   // Creates a new DraggedTabView using |renderers| as the Views. DraggedTabView
  21   // takes ownership of the views in |renderers| and |photobooth|.
  22   DraggedTabView(const std::vector<views::View*>& renderers,
  23                  const std::vector<gfx::Rect>& renderer_bounds,
  24                  const gfx::Point& mouse_tab_offset,
  25                  const gfx::Size& contents_size,
  26                  NativeViewPhotobooth* photobooth);
  27   virtual ~DraggedTabView();
  28
  29   // Moves the DraggedTabView to the appropriate location given the mouse
  30   // pointer at |screen_point|.
  31   void MoveTo(const gfx::Point& screen_point);
  32
  33   // Sets the offset of the mouse from the upper left corner of the tab.
  34   void set_mouse_tab_offset(const gfx::Point& offset) {
  35     mouse_tab_offset_ = offset;
  36   }
  37
  38   // Notifies the DraggedTabView that it should update itself.
  39   void Update();
  40
  41  private:
  42   // Overridden from views::View:
  43   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
  44   virtual void Layout() OVERRIDE;
  45   virtual gfx::Size GetPreferredSize() OVERRIDE;
  46
  47   // Paint the view, when it's not attached to any TabStrip.
  48   void PaintDetachedView(gfx::Canvas* canvas);
  49
  50   // Paint the view, when "Show window contents while dragging" is disabled.
  51   void PaintFocusRect(gfx::Canvas* canvas);
  52
  53   // Returns the preferred size of the container.
  54   gfx::Size PreferredContainerSize();
  55
  56   // Utility for scaling a size by the current scaling factor.
  57   int ScaleValue(int value);
  58
  59   // The window that contains the DraggedTabView.
  60   scoped_ptr<views::Widget> container_;
  61
  62   // The renderer that paints the Tab shape.
  63   std::vector<views::View*> renderers_;
  64
  65   // Bounds of the renderers.
  66   std::vector<gfx::Rect> renderer_bounds_;
  67
  68   // True if "Show window contents while dragging" is enabled.
  69   bool show_contents_on_drag_;
  70
  71   // The unscaled offset of the mouse from the top left of the dragged Tab.
  72   // This is used to maintain an appropriate offset for the mouse pointer when
  73   // dragging scaled and unscaled representations, and also to calculate the
  74   // position of detached windows.
  75   gfx::Point mouse_tab_offset_;
  76
  77   // The size of the tab renderer.
  78   gfx::Size tab_size_;
  79
  80   // A handle to the DIB containing the current screenshot of the WebContents
  81   // we are dragging.
  82   scoped_ptr<NativeViewPhotobooth> photobooth_;
  83
  84   // Size of the WebContents being dragged.
  85   gfx::Size contents_size_;
  86
  87   DISALLOW_COPY_AND_ASSIGN(DraggedTabView);
  88 };
  89
  90 #endif  // CHROME_BROWSER_UI_VIEWS_TABS_DRAGGED_TAB_VIEW_H_