ui/views/controls/button/label_button_border.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 UI_VIEWS_CONTROLS_BUTTON_LABEL_BUTTON_BORDER_H_
   6 #define UI_VIEWS_CONTROLS_BUTTON_LABEL_BUTTON_BORDER_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/compiler_specific.h"
  10 #include "base/memory/scoped_ptr.h"
  11 #include "ui/gfx/geometry/insets.h"
  12 #include "ui/views/border.h"
  13 #include "ui/views/controls/button/button.h"
  14 #include "ui/views/painter.h"
  15
  16 namespace views {
  17
  18 // An empty Border with customizable insets used by a LabelButton.
  19 class VIEWS_EXPORT LabelButtonBorder : public Border {
  20  public:
  21   LabelButtonBorder();
  22   ~LabelButtonBorder() override;
  23
  24   void set_insets(const gfx::Insets& insets) { insets_ = insets; }
  25
  26   // Returns true if |this| is able to paint for the given |focused| and |state|
  27   // values.
  28   virtual bool PaintsButtonState(bool focused, Button::ButtonState state);
  29
  30   // Overridden from Border:
  31   void Paint(const View& view, gfx::Canvas* canvas) override;
  32   gfx::Insets GetInsets() const override;
  33   gfx::Size GetMinimumSize() const override;
  34
  35  private:
  36   gfx::Insets insets_;
  37
  38   DISALLOW_COPY_AND_ASSIGN(LabelButtonBorder);
  39 };
  40
  41 // A Border that paints a LabelButton's background frame using image assets.
  42 class VIEWS_EXPORT LabelButtonAssetBorder : public LabelButtonBorder {
  43  public:
  44   explicit LabelButtonAssetBorder(Button::ButtonStyle style);
  45   ~LabelButtonAssetBorder() override;
  46
  47   // Returns the default insets for a given |style|.
  48   static gfx::Insets GetDefaultInsetsForStyle(Button::ButtonStyle style);
  49
  50   // Overridden from LabelButtonBorder:
  51   bool PaintsButtonState(bool focused, Button::ButtonState state) override;
  52
  53   // Overridden from Border:
  54   void Paint(const View& view, gfx::Canvas* canvas) override;
  55   gfx::Size GetMinimumSize() const override;
  56
  57   // Get or set the painter used for the specified |focused| button |state|.
  58   // LabelButtonAssetBorder takes and retains ownership of |painter|.
  59   Painter* GetPainter(bool focused, Button::ButtonState state);
  60   void SetPainter(bool focused, Button::ButtonState state, Painter* painter);
  61
  62  private:
  63   // The painters used for each unfocused or focused button state.
  64   scoped_ptr<Painter> painters_[2][Button::STATE_COUNT];
  65
  66   DISALLOW_COPY_AND_ASSIGN(LabelButtonAssetBorder);
  67 };
  68
  69 }  // namespace views
  70
  71 #endif  // UI_VIEWS_CONTROLS_BUTTON_LABEL_BUTTON_BORDER_H_