mojo/examples/keyboard/keyboard_view.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 MOJO_EXAMPLES_KEYBOARD_KEYBOARD_VIEW_H_
   6 #define MOJO_EXAMPLES_KEYBOARD_KEYBOARD_VIEW_H_
   7
   8 #include <vector>
   9
  10 #include "ui/gfx/font_list.h"
  11 #include "ui/views/controls/button/button.h"
  12 #include "ui/views/view.h"
  13
  14 namespace views {
  15 class LabelButton;
  16 }
  17
  18 namespace mojo {
  19 namespace examples {
  20
  21 class KeyboardDelegate;
  22 struct Key;
  23 struct Row;
  24
  25 // Shows a keyboard the user can interact with. The delegate is notified any
  26 // time the user presses a button.
  27 class KeyboardView : public views::View, public views::ButtonListener {
  28  public:
  29   explicit KeyboardView(KeyboardDelegate* delegate);
  30   virtual ~KeyboardView();
  31
  32   // views::View:
  33   virtual void Layout() OVERRIDE;
  34
  35  private:
  36   // The type of keys that are shown.
  37   enum KeyboardLayout {
  38     KEYBOARD_LAYOUT_ALPHA,
  39
  40     // Uppercase characters.
  41     KEYBOARD_LAYOUT_SHIFT,
  42
  43     // Numeric characters.
  44     KEYBOARD_LAYOUT_NUMERIC,
  45   };
  46
  47   int event_flags() const {
  48     return (keyboard_layout_ == KEYBOARD_LAYOUT_SHIFT) ?
  49       ui::EF_SHIFT_DOWN : ui::EF_NONE;
  50   }
  51
  52   void SetLayout(KeyboardLayout layout);
  53
  54   // Lays out the buttons for the specified row.
  55   void LayoutRow(const Row& row,
  56                  int row_index,
  57                  int initial_x,
  58                  int button_width,
  59                  int button_height);
  60
  61   // Sets the rows to show.
  62   void SetRows(const std::vector<const Row*>& rows);
  63
  64   // Configures the button in a row.
  65   void ConfigureButtonsInRow(int row_index, const Row& row);
  66
  67   // Creates a new button.
  68   views::View* CreateButton();
  69
  70   // Returns the button corresponding to a key at the specified row/column.
  71   views::LabelButton* GetButton(int row, int column);
  72
  73   const Key& GetKeyForButton(views::Button* button) const;
  74
  75   // Reset the fonts of all the buttons. |special_font| is used for the buttons
  76   // that toggle the layout.
  77   void ResetFonts(const gfx::FontList& button_font,
  78                   const gfx::FontList& special_font);
  79
  80   // views::ButtonListener:
  81   virtual void ButtonPressed(views::Button* sender,
  82                              const ui::Event& event) OVERRIDE;
  83
  84   KeyboardDelegate* delegate_;
  85
  86   // Maximium number of keys in a row. Determined from |rows_|.
  87   int max_keys_in_row_;
  88
  89   KeyboardLayout keyboard_layout_;
  90
  91   std::vector<const Row*> rows_;
  92
  93   gfx::Size last_layout_size_;
  94
  95   gfx::FontList button_font_;
  96
  97   DISALLOW_COPY_AND_ASSIGN(KeyboardView);
  98 };
  99
 100 }  // namespace examples
 101 }  // namespace mojo
 102
 103 #endif  // MOJO_EXAMPLES_KEYBOARD_KEYBOARD_VIEW_H_