ui/message_center/views/padded_button.cc

   1 // Copyright 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 #include "ui/message_center/views/padded_button.h"
   6
   7 #include "ui/base/resource/resource_bundle.h"
   8 #include "ui/gfx/canvas.h"
   9 #include "ui/message_center/message_center_style.h"
  10 #include "ui/views/controls/button/image_button.h"
  11 #include "ui/views/painter.h"
  12
  13 namespace message_center {
  14
  15 PaddedButton::PaddedButton(views::ButtonListener* listener)
  16     : views::ImageButton(listener) {
  17   SetFocusable(true);
  18   set_request_focus_on_press(false);
  19   SetFocusPainter(views::Painter::CreateSolidFocusPainter(
  20       kFocusBorderColor,
  21       gfx::Insets(1, 2, 2, 2)));
  22 }
  23
  24 PaddedButton::~PaddedButton() {
  25 }
  26
  27 void PaddedButton::SetPadding(int horizontal_padding, int vertical_padding) {
  28   padding_.Set(std::max(vertical_padding, 0),
  29                std::max(horizontal_padding, 0),
  30                std::max(-vertical_padding, 0),
  31                std::max(-horizontal_padding, 0));
  32 }
  33
  34 void PaddedButton::SetNormalImage(int resource_id) {
  35   SetImage(views::CustomButton::STATE_NORMAL,
  36            ResourceBundle::GetSharedInstance().GetImageSkiaNamed(
  37                resource_id));
  38 }
  39
  40 void PaddedButton::SetHoveredImage(int resource_id) {
  41   SetImage(views::CustomButton::STATE_HOVERED,
  42            ResourceBundle::GetSharedInstance().GetImageSkiaNamed(
  43                resource_id));
  44 }
  45
  46 void PaddedButton::SetPressedImage(int resource_id) {
  47   SetImage(views::CustomButton::STATE_PRESSED,
  48            ResourceBundle::GetSharedInstance().GetImageSkiaNamed(
  49                resource_id));
  50 }
  51
  52 gfx::Size PaddedButton::GetPreferredSize() const {
  53   return gfx::Size(message_center::kControlButtonSize,
  54                    message_center::kControlButtonSize);
  55 }
  56
  57 void PaddedButton::OnPaint(gfx::Canvas* canvas) {
  58   // This is the same implementation as ImageButton::OnPaint except
  59   // that it calls ComputePaddedImagePaintPosition() instead of
  60   // ComputeImagePaintPosition(), in effect overriding that private method.
  61   View::OnPaint(canvas);
  62   gfx::ImageSkia image = GetImageToPaint();
  63   if (!image.isNull()) {
  64     gfx::Point position = ComputePaddedImagePaintPosition(image);
  65     if (!background_image_.isNull())
  66       canvas->DrawImageInt(background_image_, position.x(), position.y());
  67     canvas->DrawImageInt(image, position.x(), position.y());
  68   }
  69   views::Painter::PaintFocusPainter(this, canvas, focus_painter());
  70 }
  71
  72 void PaddedButton::OnFocus() {
  73   views::ImageButton::OnFocus();
  74   ScrollRectToVisible(GetLocalBounds());
  75 }
  76
  77 gfx::Point PaddedButton::ComputePaddedImagePaintPosition(
  78     const gfx::ImageSkia& image) {
  79   gfx::Vector2d offset;
  80   gfx::Rect bounds = GetContentsBounds();
  81   bounds.Inset(padding_);
  82
  83   if (padding_.left() == 0 && padding_.right() == 0)
  84     offset.set_x((bounds.width() - image.width()) / 2);  // Center align.
  85   else if (padding_.right() > 0)
  86     offset.set_x(bounds.width() - image.width());  // Right align.
  87
  88   if (padding_.top() == 0 && padding_.bottom() == 0)
  89     offset.set_y((bounds.height() - image.height()) / 2);  // Middle align.
  90   else if (padding_.bottom() > 0)
  91     offset.set_y(bounds.height() - image.height());  // Bottom align.
  92
  93   return bounds.origin() + offset;
  94 }
  95
  96 }  // namespace message_center