ui/app_list/folder_image_source.h

   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 #ifndef UI_APP_LIST_APP_LIST_FOLDER_IMAGE_SOURCE_H_
   6 #define UI_APP_LIST_APP_LIST_FOLDER_IMAGE_SOURCE_H_
   7
   8 #include <vector>
   9
  10 #include "ui/gfx/image/canvas_image_source.h"
  11
  12 namespace gfx {
  13 class Canvas;
  14 class ImageSkia;
  15 class Rect;
  16 class Size;
  17 }
  18
  19 namespace app_list {
  20
  21 // Generates the folder icon with the top 4 child item icons laid in 2x2 tile.
  22 class FolderImageSource : public gfx::CanvasImageSource {
  23  public:
  24   typedef std::vector<gfx::ImageSkia> Icons;
  25
  26   FolderImageSource(const Icons& icons, const gfx::Size& size);
  27   ~FolderImageSource() override;
  28
  29   // Gets the size of a small app icon inside the folder icon.
  30   static gfx::Size ItemIconSize();
  31
  32   // Calculates the top item icons' bounds inside |folder_icon_bounds|.
  33   // Returns the bounds of top item icons in sequence of top left, top right,
  34   // bottom left, bottom right.
  35   static std::vector<gfx::Rect> GetTopIconsBounds(
  36       const gfx::Rect& folder_icon_bounds);
  37
  38  private:
  39   void DrawIcon(gfx::Canvas* canvas,
  40                 const gfx::ImageSkia& icon,
  41                 const gfx::Size icon_size,
  42                 int x,
  43                 int y);
  44
  45   // gfx::CanvasImageSource overrides:
  46   void Draw(gfx::Canvas* canvas) override;
  47
  48   Icons icons_;
  49   gfx::Size size_;
  50
  51   DISALLOW_COPY_AND_ASSIGN(FolderImageSource);
  52 };
  53
  54 }  // namespace app_list
  55
  56 #endif  // UI_APP_LIST_APP_LIST_FOLDER_ITEM_H_