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      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_VIEWS_COLOR_CHOOSER_DIALOG_H_
      6 #define CHROME_BROWSER_UI_VIEWS_COLOR_CHOOSER_DIALOG_H_
      7 
      8 #include "base/memory/ref_counted.h"
      9 #include "chrome/browser/ui/views/color_chooser_dialog.h"
     10 #include "third_party/skia/include/core/SkColor.h"
     11 #include "ui/shell_dialogs/base_shell_dialog.h"
     12 #include "ui/shell_dialogs/base_shell_dialog_win.h"
     13 
     14 namespace views {
     15 class ColorChooserListener;
     16 }
     17 
     18 class ColorChooserDialog
     19     : public base::RefCountedThreadSafe<ColorChooserDialog>,
     20       public ui::BaseShellDialog,
     21       public ui::BaseShellDialogImpl {
     22  public:
     23   ColorChooserDialog(views::ColorChooserListener* listener,
     24                      SkColor initial_color,
     25                      gfx::NativeWindow owning_window);
     26   virtual ~ColorChooserDialog();
     27 
     28   // BaseShellDialog:
     29   virtual bool IsRunning(gfx::NativeWindow owning_window) const OVERRIDE;
     30   virtual void ListenerDestroyed() OVERRIDE;
     31 
     32  private:
     33   struct ExecuteOpenParams {
     34     ExecuteOpenParams(SkColor color, RunState run_state, HWND owner);
     35     SkColor color;
     36     RunState run_state;
     37     HWND owner;
     38   };
     39 
     40   // Called on the dialog thread to show the actual color chooser.  This is
     41   // shown modal to |params.owner|.  Once it's closed, calls back to
     42   // DidCloseDialog() on the UI thread.
     43   void ExecuteOpen(const ExecuteOpenParams& params);
     44 
     45   // Called on the UI thread when a color chooser is closed.  |chose_color| is
     46   // true if the user actually chose a color, in which case |color| is the
     47   // chosen color.  Calls back to the |listener_| (if applicable) to notify it
     48   // of the results, and copies the modified array of |custom_colors_| back to
     49   // |g_custom_colors| so future dialogs will see the changes.
     50   void DidCloseDialog(bool chose_color, SkColor color, RunState run_state);
     51 
     52   // Copies the array of colors in |src| to |dst|.
     53   void CopyCustomColors(COLORREF*, COLORREF*);
     54 
     55   // The user's custom colors.  Kept process-wide so that they can be persisted
     56   // from one dialog invocation to the next.
     57   static COLORREF g_custom_colors[16];
     58 
     59   // A copy of the custom colors for the current dialog to display and modify.
     60   // This allows us to safely access the colors even if multiple windows are
     61   // simultaneously showing color choosers (which would cause thread safety
     62   // problems if we gave them direct handles to |g_custom_colors|).
     63   COLORREF custom_colors_[16];
     64 
     65   // The listener to notify when the user closes the dialog.  This may be set to
     66   // NULL before the color chooser is closed, signalling that the listener no
     67   // longer cares about the outcome.
     68   views::ColorChooserListener* listener_;
     69 
     70   DISALLOW_COPY_AND_ASSIGN(ColorChooserDialog);
     71 };
     72 
     73 #endif  // CHROME_BROWSER_UI_VIEWS_COLOR_CHOOSER_DIALOG_H_
     74