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