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// 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/geometry/insets.h"
#include "ui/gfx/geometry/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
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