Add new views::LabelButton and LabelButtonBorder.

ui/views/controls/button/label_button_border.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/label_button_border.h"
+
+#include "base/basictypes.h"
+#include "base/logging.h"
+#include "grit/ui_resources.h"
+#include "ui/base/animation/animation.h"
+#include "ui/base/resource/resource_bundle.h"
+#include "ui/gfx/canvas.h"
+#include "ui/views/controls/button/label_button.h"
+
+namespace {
+
+// Preferred padding between content and edge.
+static const int kPreferredPaddingHorizontal = 6;
+static const int kPreferredPaddingVertical = 5;
+
+// Preferred padding between content and edge for NativeTheme border.
+static const int kPreferredNativeThemePaddingHorizontal = 12;
+static const int kPreferredNativeThemePaddingVertical = 5;
+
+const int kHoverImageSet[] = {
+  IDR_TEXTBUTTON_HOVER_TOP_LEFT,
+  IDR_TEXTBUTTON_HOVER_TOP,
+  IDR_TEXTBUTTON_HOVER_TOP_RIGHT,
+  IDR_TEXTBUTTON_HOVER_LEFT,
+  IDR_TEXTBUTTON_HOVER_CENTER,
+  IDR_TEXTBUTTON_HOVER_RIGHT,
+  IDR_TEXTBUTTON_HOVER_BOTTOM_LEFT,
+  IDR_TEXTBUTTON_HOVER_BOTTOM,
+  IDR_TEXTBUTTON_HOVER_BOTTOM_RIGHT,
+};
+
+const int kPressedImageSet[] = {
+  IDR_TEXTBUTTON_PRESSED_TOP_LEFT,
+  IDR_TEXTBUTTON_PRESSED_TOP,
+  IDR_TEXTBUTTON_PRESSED_TOP_RIGHT,
+  IDR_TEXTBUTTON_PRESSED_LEFT,
+  IDR_TEXTBUTTON_PRESSED_CENTER,
+  IDR_TEXTBUTTON_PRESSED_RIGHT,
+  IDR_TEXTBUTTON_PRESSED_BOTTOM_LEFT,
+  IDR_TEXTBUTTON_PRESSED_BOTTOM,
+  IDR_TEXTBUTTON_PRESSED_BOTTOM_RIGHT,
+};
+
+}  // namespace
+
+namespace views {
+
+LabelButtonBorder::LabelButtonBorder(NativeThemeDelegate* delegate)
+    : native_theme_delegate_(delegate),
+      native_theme_(false) {
+  SetImages(CustomButton::BS_HOT, BorderImages(kHoverImageSet));
+  SetImages(CustomButton::BS_PUSHED, BorderImages(kPressedImageSet));
+}
+
+LabelButtonBorder::~LabelButtonBorder() {}
+
+void LabelButtonBorder::Paint(const View& view, gfx::Canvas* canvas) const {
+  const CustomButton* button = static_cast<const CustomButton*>(&view);
+  if (native_theme()) {
+    PaintNativeTheme(view, canvas);
+  } else if (native_theme_delegate_->GetThemeAnimation() &&
+             native_theme_delegate_->GetThemeAnimation()->is_animating()) {
+    // TODO(pkasting|msw): Crossfade between button state image sets.
+    canvas->SaveLayerAlpha(static_cast<uint8>(native_theme_delegate_->
+        GetThemeAnimation()->CurrentValueBetween(0, 255)));
+    canvas->DrawColor(SkColorSetARGB(0x00, 0xFF, 0xFF, 0xFF),
+                      SkXfermode::kClear_Mode);
+    PaintImages(view, canvas, button->state());
+    canvas->Restore();
+  } else {
+    PaintImages(view, canvas, button->state());
+  }
+}
+
+void LabelButtonBorder::GetInsets(gfx::Insets* insets) const {
+  if (native_theme()) {
+    insets->Set(kPreferredNativeThemePaddingVertical,
+                kPreferredNativeThemePaddingHorizontal,
+                kPreferredNativeThemePaddingVertical,
+                kPreferredNativeThemePaddingHorizontal);
+  } else {
+    insets->Set(kPreferredPaddingVertical, kPreferredPaddingHorizontal,
+                kPreferredPaddingVertical, kPreferredPaddingHorizontal);
+  }
+}
+
+LabelButtonBorder::BorderImages::BorderImages() {}
+
+LabelButtonBorder::BorderImages::~BorderImages() {}
+
+LabelButtonBorder::BorderImages::BorderImages(const int image_ids[]) {
+  ResourceBundle& rb = ResourceBundle::GetSharedInstance();
+  top_left = *rb.GetImageSkiaNamed(image_ids[0]);
+  top = *rb.GetImageSkiaNamed(image_ids[1]);
+  top_right = *rb.GetImageSkiaNamed(image_ids[2]);
+  left = *rb.GetImageSkiaNamed(image_ids[3]);
+  center = *rb.GetImageSkiaNamed(image_ids[4]);
+  right = *rb.GetImageSkiaNamed(image_ids[5]);
+  bottom_left = *rb.GetImageSkiaNamed(image_ids[6]);
+  bottom = *rb.GetImageSkiaNamed(image_ids[7]);
+  bottom_right = *rb.GetImageSkiaNamed(image_ids[8]);
+}
+
+void LabelButtonBorder::SetImages(CustomButton::ButtonState state,
+                                  const BorderImages& set) {
+  images_[state] = set;
+}
+
+void LabelButtonBorder::PaintImages(const View& view,
+                                    gfx::Canvas* canvas,
+                                    CustomButton::ButtonState state) const {
+  const BorderImages& set = images_[state];
+  if (set.top_left.isNull())
+    return;
+
+  const int width = view.bounds().width();
+  const int height = view.bounds().height();
+  const int tl_width = set.top_left.width();
+  const int tl_height = set.top_left.height();
+  const int t_height = set.top.height();
+  const int tr_height = set.top_right.height();
+  const int l_width = set.left.width();
+  const int r_width = set.right.width();
+  const int bl_width = set.bottom_left.width();
+  const int bl_height = set.bottom_left.height();
+  const int b_height = set.bottom.height();
+  const int br_width = set.bottom_right.width();
+  const int br_height = set.bottom_right.height();
+
+  canvas->DrawImageInt(set.top_left, 0, 0);
+  canvas->DrawImageInt(set.top, 0, 0, set.top.width(), t_height, tl_width, 0,
+      width - tl_width - set.top_right.width(), t_height, false);
+  canvas->DrawImageInt(set.top_right, width - set.top_right.width(), 0);
+  canvas->DrawImageInt(set.left, 0, 0, l_width, set.left.height(), 0,
+      tl_height, tl_width, height - tl_height - bl_height, false);
+  canvas->DrawImageInt(set.center, 0, 0, set.center.width(),
+      set.center.height(), l_width, t_height, width - l_width - r_width,
+      height - t_height - b_height, false);
+  canvas->DrawImageInt(set.right, 0, 0, r_width, set.right.height(),
+                       width - r_width, tr_height, r_width,
+                       height - tr_height - br_height, false);
+  canvas->DrawImageInt(set.bottom_left, 0, height - bl_height);
+  canvas->DrawImageInt(set.bottom, 0, 0, set.bottom.width(), b_height,
+                       bl_width, height - b_height,
+                       width - bl_width - br_width, b_height, false);
+  canvas->DrawImageInt(set.bottom_right, width - br_width,
+                       height - br_height);
+}
+
+void LabelButtonBorder::PaintNativeTheme(const View& view,
+                                         gfx::Canvas* canvas) const {
+  const ui::NativeTheme* theme = ui::NativeTheme::instance();
+  ui::NativeTheme::Part part = native_theme_delegate_->GetThemePart();
+  gfx::Rect rect(native_theme_delegate_->GetThemePaintRect());
+
+  ui::NativeTheme::State state;
+  ui::NativeTheme::ExtraParams extra;
+  const ui::Animation* animation = native_theme_delegate_->GetThemeAnimation();
+  if (animation && animation->is_animating()) {
+    // Paint the background state.
+    state = native_theme_delegate_->GetBackgroundThemeState(&extra);
+    theme->Paint(canvas->sk_canvas(), part, state, rect, extra);
+
+    // Composite the foreground state above the background state.
+    state = native_theme_delegate_->GetForegroundThemeState(&extra);
+    const int alpha = animation->CurrentValueBetween(0, 255);
+    canvas->SaveLayerAlpha(static_cast<uint8>(alpha));
+    theme->Paint(canvas->sk_canvas(), part, state, rect, extra);
+    canvas->Restore();
+  } else {
+    state = native_theme_delegate_->GetThemeState(&extra);
+    theme->Paint(canvas->sk_canvas(), part, state, rect, extra);
+  }
+
+  // Draw the Views focus border for the native theme style.
+  if (view.focus_border() && extra.button.is_focused)
+    view.focus_border()->Paint(view, canvas);
+}
+
+}  // namespace views