Update ConstrainedWindowViews appearance according to mock

ui/views/controls/button/web_style_text_button.cc

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "ui/views/controls/button/web_style_text_button.h"
+
+#include <algorithm>
+
+#include "ui/gfx/canvas.h"
+#include "ui/gfx/color_utils.h"
+#include "ui/views/painter.h"
+#include "ui/views/background.h"
+
+namespace views {
+namespace {
+const int kMinWidth = 72;
+const int kMinHeight = 27;
+
+// Fractional position between top and bottom of button where the
+// gradient starts.
+const SkScalar kGradientStartLocation = 0.38f;
+const SkColor kNormalBackgroundTopColor = SkColorSetRGB(0xf0, 0xf0, 0xf0);
+const SkColor kNormalBackgroundBottomColor = SkColorSetRGB(0xe0, 0xe0, 0xe0);
+const SkColor kHotBackgroundTopColor = SkColorSetRGB(0xf4, 0xf4, 0xf4);
+const SkColor kHotBackgroundBottomColor = SkColorSetRGB(0xe4, 0xe4, 0xe4);
+const SkColor kPushedBackgroundTopColor = SkColorSetRGB(0xeb, 0xeb, 0xeb);
+const SkColor kPushedBackgroundBottomColor = SkColorSetRGB(0xdb, 0xdb, 0xdb);
+const SkColor kDisabledBackgroundTopColor = SkColorSetRGB(0xed, 0xed, 0xed);
+const SkColor kDisabledBackgroundBottomColor = SkColorSetRGB(0xde, 0xde, 0xde);
+
+const SkColor kEnabledTextColor = SkColorSetRGB(0x33, 0x33, 0x33);
+const SkColor kDisabledTextColor = SkColorSetRGB(0xaa, 0xaa, 0xaa);
+const SkColor kHoverTextColor = SkColorSetRGB(0x0, 0x0, 0x0);
+
+const SkColor kTextShadowColor = SkColorSetRGB(0xf0, 0xf0, 0xf0);
+const int kTextShadowOffsetX = 0;
+const int kTextShadowOffsetY = 1;
+
+const int kBorderWidth = 1;
+const int kBorderRadius = 2;
+const SkColor kBorderNormalColor = SkColorSetARGB(0x3f, 0x0, 0x0, 0x0);
+const SkColor kBorderActiveColor = SkColorSetARGB(0x4b, 0x0, 0x0, 0x0);
+const SkColor kBorderDisabledColor = SkColorSetARGB(0x1d, 0x0, 0x0, 0x0);
+
+const int kFocusRingWidth = 2;
+const int kFocusRingRadius = 2;
+const SkColor kFocusRingColor = SkColorSetARGB(0x7f, 0xe5, 0x97, 0x00);
+
+// Returns the uniform inset of the button from its local bounds.
+int GetButtonInset() {
+  return std::max(kBorderWidth, kFocusRingWidth);
+}
+}  // namespace
+
+class WebStyleTextButtonBackground : public Background {

[Ben Goodger (Google), 2012/09/17 22:37:26]

Also I would like to come up with a different name for this stuff. WebStyle had
me confused for a while. ChromeStyle?

[Mike Wittman, 2012/09/21 22:53:18]

Works for me.  I wasn't sure what the best name for this was.

+ public:
+  WebStyleTextButtonBackground() {
+  }
+
+  virtual ~WebStyleTextButtonBackground() {
+  }
+
+  // Overriden from Background
+  virtual void Paint(gfx::Canvas* canvas, View* view) const {
+    if (painter_.get())
+    {
+      gfx::Rect bounds = view->GetLocalBounds();
+      // Inset to the actual button region.
+      int inset = GetButtonInset();
+      bounds.Inset(inset, inset, inset, inset);
+      Painter::PaintPainterAt(canvas, painter_.get(), bounds);
+    }
+  }
+
+  void SetColors(SkColor top, SkColor bottom) {
+    static const int count = 3;
+    SkColor colors[count] = { top, top, bottom };
+    SkScalar pos[count] = { 0.0f, kGradientStartLocation, 1.0f };
+
+    painter_.reset(
+        Painter::CreateVerticalMultiColorGradient(colors, pos, count));
+    SetNativeControlColor(
+        color_utils::AlphaBlend(colors[0], colors[count - 1], 128));
+  }
+
+ private:
+  scoped_ptr<Painter> painter_;
+
+  DISALLOW_COPY_AND_ASSIGN(WebStyleTextButtonBackground);
+};
+
+class WebStyleTextButtonBorderPainter : public views::Painter {
+ public:
+  WebStyleTextButtonBorderPainter()
+      // This value should be updated prior to rendering; it's set to a
+      // well-defined value here defensively.
+      : color_(SkColorSetRGB(0x0, 0x0, 0x0)) {
+  }
+
+  // Overriden from Painter
+  virtual void Paint(gfx::Canvas* canvas, const gfx::Size& size) {
+    SkPaint paint;
+    paint.setStyle(SkPaint::kStroke_Style);
+    paint.setColor(color_);
+    paint.setStrokeWidth(kBorderWidth);
+
+    // Inset by 1/2 pixel to align the stroke with pixel centers.
+    SkScalar inset = 0.5f;
+    SkRect rect = SkRect::MakeLTRB(inset, inset,
+                                   SkIntToScalar(size.width()) - inset,
+                                   SkIntToScalar(size.height()) - inset);
+
+    canvas->sk_canvas()->drawRoundRect(
+        rect, kBorderRadius, kBorderRadius, paint);
+  }
+
+  void set_color(SkColor color) {
+    color_ = color;
+  }
+
+ private:
+  SkColor color_;
+
+  DISALLOW_COPY_AND_ASSIGN(WebStyleTextButtonBorderPainter);
+};
+
+
+class WebStyleTextButtonBorder : public views::Border {
+ public:
+  WebStyleTextButtonBorder()
+      : painter_(new WebStyleTextButtonBorderPainter) {
+  }
+
+  // Overriden from Border
+  virtual void Paint(const View& view, gfx::Canvas* canvas) const {
+    gfx::Rect bounds = view.GetLocalBounds();
+    int border_inset = GetButtonInset() - kBorderWidth;
+    bounds.Inset(border_inset, border_inset, border_inset, border_inset);
+    Painter::PaintPainterAt(canvas, painter_, bounds);
+  }
+  virtual void GetInsets(gfx::Insets* insets) const {
+    DCHECK(insets);
+    int inset = GetButtonInset();
+    insets->Set(inset, inset, inset, inset);
+  }
+
+  void SetColor(SkColor color) {
+    painter_->set_color(color);
+  }
+
+ private:
+  WebStyleTextButtonBorderPainter* painter_;
+
+  DISALLOW_COPY_AND_ASSIGN(WebStyleTextButtonBorder);
+};
+
+
+
+const char WebStyleTextButton::kViewClassName[] = "WebStyleTextButton";
+
+WebStyleTextButton::WebStyleTextButton(ButtonListener* listener,
+                                       const string16& title)
+    : TextButton(listener, title),
+      prior_state_(state()),
+      web_style_background_(NULL),
+      web_style_border_(NULL) {
+  set_focusable(true);
+  set_request_focus_on_press(false);
+
+  set_alignment(ALIGN_CENTER);
+  web_style_background_ = new WebStyleTextButtonBackground;
+  set_background(web_style_background_);
+
+  SetEnabledColor(kEnabledTextColor);
+  SetDisabledColor(kDisabledTextColor);
+  SetHoverColor(kHoverTextColor);
+
+  SetBackgroundForState(state());
+  SetShadowForState(state());
+
+  web_style_border_ = new WebStyleTextButtonBorder;
+  set_border(web_style_border_);
+
+  SetBorderColorForState(state());
+}
+
+gfx::Size WebStyleTextButton::GetPreferredSize() {
+  gfx::Size prefsize(TextButton::GetPreferredSize());
+  prefsize.set_width(std::max(prefsize.height(), kMinWidth));
+  prefsize.set_height(std::max(prefsize.height(), kMinHeight));
+
+  return prefsize;
+}
+
+void WebStyleTextButton::OnPaintFocusBorder(gfx::Canvas* canvas) {
+  if (HasFocus() && (focusable() || IsAccessibilityFocusable())) {
+    gfx::Rect rect(GetLocalBounds());
+    SkScalar inset = GetButtonInset() - kFocusRingWidth / 2.0f;
+    rect.Inset(inset, inset);
+    SkPaint paint;
+    paint.setStyle(SkPaint::kStroke_Style);
+    paint.setStrokeWidth(SkScalar(kFocusRingWidth));
+    paint.setColor(kFocusRingColor);
+    canvas->DrawRoundRect(rect, SkScalar(kFocusRingRadius), paint);
+  }
+}
+
+void WebStyleTextButton::StateChanged() {
+  TextButton::StateChanged();
+
+  SetBackgroundForState(state());
+
+  // Update text shadow when transitioning to/from pushed state.
+  if (state() == BS_PUSHED || prior_state_ == BS_PUSHED) {
+    SetShadowForState(state());
+  }
+
+  // Update border color.  We need to change it in all cases except hot
+  // followed by pushed.
+  if (!(state() == BS_PUSHED && prior_state_ == BS_HOT)) {
+    SetBorderColorForState(state());
+  }
+
+  prior_state_ = state();
+}
+
+std::string WebStyleTextButton::GetClassName() const {
+  return kViewClassName;
+}
+
+void WebStyleTextButton::SetBackgroundForState(ButtonState state) {
+  SkColor top;
+  SkColor bottom;
+
+  switch (state) {
+    case BS_NORMAL:
+      top = kNormalBackgroundTopColor;
+      bottom = kNormalBackgroundBottomColor;
+      break;
+
+    case BS_HOT:
+      top = kHotBackgroundTopColor;
+      bottom = kHotBackgroundBottomColor;
+      break;
+
+    case BS_PUSHED:
+      top = kPushedBackgroundTopColor;
+      bottom = kPushedBackgroundBottomColor;
+      break;
+
+    case BS_DISABLED:
+      top = kDisabledBackgroundTopColor;
+      bottom = kDisabledBackgroundBottomColor;
+      break;
+
+    default:
+      NOTREACHED();
+      break;
+  }
+
+  web_style_background_->SetColors(top, bottom);
+}
+
+void WebStyleTextButton::SetShadowForState(ButtonState state) {
+  if (state == BS_PUSHED) {
+    // Turn off text shadow.
+    ClearEmbellishing();
+  } else {
+    SetTextShadowColors(kTextShadowColor, kTextShadowColor);
+    SetTextShadowOffset(kTextShadowOffsetX, kTextShadowOffsetY);
+  }
+}
+
+void WebStyleTextButton::SetBorderColorForState(ButtonState state) {
+  SkColor border_color;
+
+  switch (state) {
+    case BS_NORMAL:
+      border_color = kBorderNormalColor;
+      break;
+
+    case BS_HOT:
+    case BS_PUSHED:
+      border_color = kBorderActiveColor;
+      break;
+
+    case BS_DISABLED:
+      border_color = kBorderDisabledColor;
+      break;
+
+    default:
+      NOTREACHED();
+      break;
+  }
+
+  web_style_border_->SetColor(border_color);
+}
+
+}  // namespace views