Make clicking on side tabs to select them work.

Use a simple round rect for the visual treatment. 
Add some rect conversion utils. 

http://crbug.com/34509 
TEST=none 

Review URL: http://codereview.chromium.org/597012

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@38856 0039d316-1c4b-4281-b951-d872f2087c98

5 files changed, 88 insertions, 0 deletions

diff --git a/app/app_base.gypi b/app/app_base.gypi
index fdc8854..81305aa 100644
--- a/app/app_base.gypi
+++ b/app/app_base.gypi
@@ -150,6 +150,8 @@
         'gfx/scrollbar_size.h',
         'gfx/skbitmap_operations.cc',
         'gfx/skbitmap_operations.h',
+        'gfx/skia_util.cc',
+        'gfx/skia_util.h',
         'gfx/text_elider.cc',
         'gfx/text_elider.h',
         'gtk_dnd_util.cc',
diff --git a/app/gfx/canvas.cc b/app/gfx/canvas.cc
index 306531c4..420c984 100644
--- a/app/gfx/canvas.cc
+++ b/app/gfx/canvas.cc
@@ -221,6 +221,14 @@ void Canvas::DrawStringInt(const std::wstring& text,
                 l10n_util::DefaultCanvasTextAlignment());
 }
 
+void Canvas::DrawStringInt(const std::wstring& text,
+                           const gfx::Font& font,
+                           const SkColor& color,
+                           const gfx::Rect& display_rect) {
+  DrawStringInt(text, font, color, display_rect.x(), display_rect.y(),
+                display_rect.width(), display_rect.height());
+}
+
 void Canvas::TileImageInt(const SkBitmap& bitmap, int x, int y, int w, int h) {
   TileImageInt(bitmap, 0, 0, x, y, w, h);
 }
diff --git a/app/gfx/canvas.h b/app/gfx/canvas.h
index e59db16..79eed9c 100644
--- a/app/gfx/canvas.h
+++ b/app/gfx/canvas.h
@@ -163,6 +163,8 @@ class Canvas : public skia::PlatformCanvas {
   // text is too big, it is truncated and '...' is added to the end.
   void DrawStringInt(const std::wstring& text, const gfx::Font& font,
                      const SkColor& color, int x, int y, int w, int h);
+  void DrawStringInt(const std::wstring& text, const gfx::Font& font,
+                     const SkColor& color, const gfx::Rect& display_rect);
 
   // Draws text with the specified color, font and location. The last argument
   // specifies flags for how the text should be rendered. It can be one of
diff --git a/app/gfx/skia_util.cc b/app/gfx/skia_util.cc
new file mode 100644
index 0000000..fa6ec24
--- /dev/null
+++ b/app/gfx/skia_util.cc
@@ -0,0 +1,42 @@
+// Copyright (c) 2010 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 "app/gfx/skia_util.h"
+
+#include "base/gfx/rect.h"
+#include "third_party/skia/include/core/SkColorPriv.h"
+#include "third_party/skia/include/core/SkShader.h"
+#include "third_party/skia/include/effects/SkGradientShader.h"
+
+namespace gfx {
+
+SkRect RectToSkRect(const gfx::Rect& rect) {
+  SkRect r;
+  r.set(SkIntToScalar(rect.x()), SkIntToScalar(rect.y()),
+        SkIntToScalar(rect.right()), SkIntToScalar(rect.bottom()));
+  return r;
+}
+
+gfx::Rect SkRectToRect(const SkRect& rect) {
+  return gfx::Rect(SkScalarToFixed(rect.fLeft),
+                   SkScalarToFixed(rect.fTop),
+                   SkScalarToFixed(rect.width()),
+                   SkScalarToFixed(rect.height()));
+}
+
+SkShader* CreateGradientShader(int start_point,
+                               int end_point,
+                               SkColor start_color,
+                               SkColor end_color) {
+  SkColor grad_colors[2] = { start_color, end_color};
+  SkPoint grad_points[2];
+  grad_points[0].set(SkIntToScalar(0), SkIntToScalar(start_point));
+  grad_points[1].set(SkIntToScalar(0), SkIntToScalar(end_point));
+
+  return SkGradientShader::CreateLinear(
+      grad_points, grad_colors, NULL, 2, SkShader::kRepeat_TileMode);
+}
+
+}  // namespace gfx
+
diff --git a/app/gfx/skia_util.h b/app/gfx/skia_util.h
new file mode 100644
index 0000000..66a8aeb
--- /dev/null
+++ b/app/gfx/skia_util.h
@@ -0,0 +1,34 @@
+// Copyright (c) 2010 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.
+
+#ifndef APP_GFX_SKIA_UTIL_H_
+#define APP_GFX_SKIA_UTIL_H_
+
+#include "third_party/skia/include/core/SkColor.h"
+#include "third_party/skia/include/core/SkRect.h"
+
+class SkShader;
+
+namespace gfx {
+
+class Rect;
+
+// Convert between Skia and gfx rect types.
+SkRect RectToSkRect(const gfx::Rect& rect);
+gfx::Rect SkRectToRect(const SkRect& rect);
+
+// Creates a vertical gradient shader. The caller owns the shader.
+// Example usage to avoid leaks:
+//   paint.setShader(gfx::CreateGradientShader(0, 10, red, blue))->safeUnref();
+//
+// (The old shader in the paint, if any, needs to be freed, and safeUnref will
+// handle the NULL case.)
+SkShader* CreateGradientShader(int start_point,
+                               int end_point,
+                               SkColor start_color,
+                               SkColor end_color);
+
+}  // namespace gfx;
+
+#endif  // APP_GFX_SKIA_UTIL_H_