Compact Navigation prototype

chrome/browser/ui/views/dropdown_bar_view.cc

+// Copyright (c) 2011 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 "chrome/browser/ui/views/dropdown_bar_view.h"
+
+#include "chrome/browser/themes/theme_service.h"
+#include "chrome/browser/ui/view_ids.h"
+#include "chrome/browser/ui/views/frame/browser_view.h"
+#include "grit/generated_resources.h"
+#include "grit/theme_resources_standard.h"
+#include "ui/base/resource/resource_bundle.h"
+#include "ui/gfx/canvas.h"
+#include "views/background.h"
+#include "views/widget/widget.h"
+
+namespace {
+
+// When we are animating, we draw only the top part of the left and right
+// edges to give the illusion that the find dialog is attached to the
+// window during this animation; this is the height of the items we draw.
+const int kAnimatingEdgeHeight = 5;
+
+}  // namespace
+
+DropdownBarView::DropdownBarView(DropdownBarHost* host)
+    : host_(host),
+      animation_offset_(0),
+      dialog_left_(NULL),
+      dialog_middle_(NULL),
+      dialog_right_(NULL) {
+}
+
+DropdownBarView::~DropdownBarView() {
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// DropDownBarView, public:
+
+void DropdownBarView::SetAnimationOffset(int offset) {
+  animation_offset_ = offset;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// DropDownBarView, protected:
+
+void DropdownBarView::SetDialogBorderBitmaps(const SkBitmap* dialog_left,
+                                             const SkBitmap* dialog_middle,
+                                             const SkBitmap* dialog_right) {
+  dialog_left_ = dialog_left;
+  dialog_middle_ = dialog_middle;
+  dialog_right_ = dialog_right;
+}
+
+gfx::Rect DropdownBarView::PaintOffsetToolbarBackground(gfx::Canvas* canvas) {
+  // Determine the find bar size as well as the offset from which to tile the
+  // toolbar background image.  First, get the widget bounds.
+  gfx::Rect bounds = GetWidget()->GetWindowScreenBounds();
+  // Now convert from screen to parent coordinates.
+  gfx::Point origin(bounds.origin());
+  BrowserView* browser_view = host()->browser_view();
+  ConvertPointToView(NULL, browser_view, &origin);
+  bounds.set_origin(origin);
+  // Finally, calculate the background image tiling offset.
+  origin = browser_view->OffsetPointForToolbarBackgroundImage(origin);
+
+  // First, we draw the background image for the whole dialog (3 images: left,
+  // middle and right). Note, that the window region has been set by the
+  // controller, so the whitespace in the left and right background images is
+  // actually outside the window region and is therefore not drawn. See
+  // FindInPageWidgetWin::CreateRoundedWindowEdges() for details.
+  ui::ThemeProvider* tp = GetThemeProvider();
+  canvas->TileImageInt(*tp->GetBitmapNamed(IDR_THEME_TOOLBAR), origin.x(),
+      origin.y(), 0, 0, bounds.width(), bounds.height());
+  return bounds;
+}
+
+void DropdownBarView::PaintDialogBorder(gfx::Canvas* canvas,
+                                        const gfx::Rect& bounds) const {
+  DCHECK(dialog_left_);
+  DCHECK(dialog_middle_);
+  DCHECK(dialog_right_);
+
+  canvas->DrawBitmapInt(*dialog_left_, 0, 0);
+
+  // Stretch the middle background to cover all of the area between the two
+  // other images.
+  canvas->TileImageInt(*dialog_middle_, dialog_left_->width(), 0,
+      bounds.width() - dialog_left_->width() - dialog_right_->width(),
+      dialog_middle_->height());
+
+  canvas->DrawBitmapInt(*dialog_right_, bounds.width() - dialog_right_->width(),
+      0);
+}
+
+void DropdownBarView::PaintAnimatingEdges(gfx::Canvas* canvas,
+                                         const gfx::Rect& bounds) const {
+  if (animation_offset() > 0) {
+    // While animating we draw the curved edges at the point where the
+    // controller told us the top of the window is: |animation_offset()|.
+    canvas->TileImageInt(*dialog_left_, bounds.x(), animation_offset(),
+                         dialog_left_->width(), kAnimatingEdgeHeight);
+    canvas->TileImageInt(*dialog_right_,
+        bounds.width() - dialog_right_->width(), animation_offset(),
+        dialog_right_->width(), kAnimatingEdgeHeight);
+  }
+}