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      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
     97