content/browser/web_contents/aura/image_window_delegate.h

   1 // Copyright (c) 2013 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 CONTENT_BROWSER_WEB_CONTENTS_AURA_IMAGE_WINDOW_DELEGATE_H_
   6 #define CONTENT_BROWSER_WEB_CONTENTS_AURA_IMAGE_WINDOW_DELEGATE_H_
   7
   8 #include "content/common/content_export.h"
   9 #include "ui/aura/window_delegate.h"
  10 #include "ui/gfx/image/image.h"
  11 #include "ui/gfx/size.h"
  12
  13 namespace content {
  14
  15 // An ImageWindowDelegate paints an image for a Window. The delegate destroys
  16 // itself when the Window is destroyed. The delegate does not consume any event.
  17 class CONTENT_EXPORT ImageWindowDelegate : public aura::WindowDelegate {
  18  public:
  19   ImageWindowDelegate();
  20
  21   void SetImage(const gfx::Image& image);
  22   bool has_image() const { return !image_.IsEmpty(); }
  23
  24  protected:
  25   ~ImageWindowDelegate() override;
  26
  27   // Overridden from aura::WindowDelegate:
  28   gfx::Size GetMinimumSize() const override;
  29   gfx::Size GetMaximumSize() const override;
  30   void OnBoundsChanged(const gfx::Rect& old_bounds,
  31                        const gfx::Rect& new_bounds) override;
  32   gfx::NativeCursor GetCursor(const gfx::Point& point) override;
  33   int GetNonClientComponent(const gfx::Point& point) const override;
  34   bool ShouldDescendIntoChildForEventHandling(
  35       aura::Window* child,
  36       const gfx::Point& location) override;
  37   bool CanFocus() override;
  38   void OnCaptureLost() override;
  39   void OnPaint(gfx::Canvas* canvas) override;
  40   void OnDeviceScaleFactorChanged(float device_scale_factor) override;
  41   void OnWindowDestroying(aura::Window* window) override;
  42   void OnWindowDestroyed(aura::Window* window) override;
  43   void OnWindowTargetVisibilityChanged(bool visible) override;
  44   bool HasHitTestMask() const override;
  45   void GetHitTestMask(gfx::Path* mask) const override;
  46
  47  protected:
  48   gfx::Image image_;
  49   gfx::Size window_size_;
  50
  51   // Keeps track of whether the window size matches the image size or not. If
  52   // the image size is smaller than the window size, then the delegate paints a
  53   // white background for the missing regions.
  54   bool size_mismatch_;
  55
  56   DISALLOW_COPY_AND_ASSIGN(ImageWindowDelegate);
  57 };
  58
  59 }  // namespace content
  60
  61 #endif  // CONTENT_BROWSER_WEB_CONTENTS_AURA_IMAGE_WINDOW_DELEGATE_H_