| // Copyright 2013 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/shadow_border.h" |
| |
| #include "ui/gfx/canvas.h" |
| #include "ui/gfx/insets.h" |
| #include "ui/gfx/rect.h" |
| #include "ui/gfx/shadow_value.h" |
| #include "ui/gfx/skia_util.h" |
| #include "ui/views/view.h" |
| |
| namespace views { |
| |
| ShadowBorder::ShadowBorder(int blur, |
| SkColor color, |
| int vertical_offset, |
| int horizontal_offset) |
| : views::Border(), |
| blur_(blur), |
| color_(color), |
| vertical_offset_(vertical_offset), |
| horizontal_offset_(horizontal_offset) {} |
| |
| ShadowBorder::~ShadowBorder() {} |
| |
| // TODO(sidharthms): Re-painting a shadow looper on every paint call may yield |
| // poor performance. Ideally we should be caching the border to bitmaps. |
| void ShadowBorder::Paint(const views::View& view, gfx::Canvas* canvas) { |
| SkPaint paint; |
| std::vector<gfx::ShadowValue> shadows; |
| shadows.push_back(gfx::ShadowValue(gfx::Point(), blur_, color_)); |
| skia::RefPtr<SkDrawLooper> looper = gfx::CreateShadowDrawLooper(shadows); |
| paint.setLooper(looper.get()); |
| paint.setColor(SK_ColorTRANSPARENT); |
| paint.setStrokeJoin(SkPaint::kRound_Join); |
| gfx::Rect bounds(view.size()); |
| // TODO(pkasting): This isn't right if one of the offsets is larger than |
| // (blur_ / 2). |
| bounds.Inset(gfx::Insets(blur_ / 2, blur_ / 2, blur_ / 2, blur_ / 2)); |
| canvas->DrawRect(bounds, paint); |
| } |
| |
| gfx::Insets ShadowBorder::GetInsets() const { |
| return gfx::Insets(blur_ / 2 - vertical_offset_, |
| blur_ / 2 - horizontal_offset_, |
| blur_ / 2 + vertical_offset_, |
| blur_ / 2 + horizontal_offset_); |
| } |
| |
| gfx::Size ShadowBorder::GetMinimumSize() const { |
| return gfx::Size(blur_, blur_); |
| } |
| |
| } // namespace views |