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// Copyright (c) 2009 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/views/tabs/tab_overview_container.h"
#include "app/gfx/canvas.h"
#include "chrome/browser/views/tabs/tab_overview_grid.h"
#include "third_party/skia/include/core/SkPath.h"
#include "third_party/skia/include/effects/SkGradientShader.h"
// Padding between the edges of us and the grid.
static const int kVerticalPadding = 43;
static const int kHorizontalPadding = 30;
// Height of the arrow.
static const int kArrowHeight = 28;
// Radius of the corners of the rectangle.
static const int kEdgeSize = 8;
TabOverviewContainer::TabOverviewContainer() : arrow_center_(0) {
}
TabOverviewContainer::~TabOverviewContainer() {
}
void TabOverviewContainer::SetMaxSize(const gfx::Size& max_size) {
GetTabOverviewGrid()->set_max_size(
gfx::Size(max_size.width() - kHorizontalPadding * 2,
max_size.height() - kVerticalPadding * 2 - kArrowHeight));
}
gfx::Size TabOverviewContainer::GetPreferredSize() {
gfx::Size tab_overview_pref = GetTabOverviewGrid()->GetPreferredSize();
return gfx::Size(kHorizontalPadding * 2 + tab_overview_pref.width(),
kVerticalPadding * 2 + tab_overview_pref.height() +
kArrowHeight);
}
void TabOverviewContainer::Layout() {
GetTabOverviewGrid()->SetBounds(kHorizontalPadding, kVerticalPadding,
width() - kHorizontalPadding * 2,
height() - kVerticalPadding * 2 -
kArrowHeight);
}
void TabOverviewContainer::Paint(gfx::Canvas* canvas) {
// Create a path with a rounded rect and arrow pointing down.
SkPath outline;
int right = width() - 1;
int bottom = height() - 1 - kArrowHeight;
outline.moveTo(SkIntToScalar(kEdgeSize), SkIntToScalar(0));
outline.arcTo(SkIntToScalar(right), SkIntToScalar(0),
SkIntToScalar(right), SkIntToScalar(bottom),
SkIntToScalar(kEdgeSize));
outline.arcTo(SkIntToScalar(right), SkIntToScalar(bottom),
SkIntToScalar(0), SkIntToScalar(bottom),
SkIntToScalar(kEdgeSize));
// Convert arrow_center to our coordinates.
int arrow_center = arrow_center_ - bounds().x();
if (arrow_center >= kArrowHeight && arrow_center < width() - kArrowHeight) {
// Only draw the arrow if we have enough space.
outline.lineTo(SkIntToScalar(width() / 2 + kArrowHeight / 2),
SkIntToScalar(bottom));
outline.lineTo(SkIntToScalar(arrow_center),
SkIntToScalar(bottom + kArrowHeight));
outline.lineTo(SkIntToScalar(width() / 2 - kArrowHeight / 2),
SkIntToScalar(bottom));
}
outline.arcTo(SkIntToScalar(0), SkIntToScalar(bottom),
SkIntToScalar(0), SkIntToScalar(0),
SkIntToScalar(kEdgeSize));
outline.arcTo(SkIntToScalar(0), SkIntToScalar(0),
SkIntToScalar(right), SkIntToScalar(0),
SkIntToScalar(kEdgeSize));
canvas->save();
// Clip out the outline.
canvas->clipPath(outline);
// Fill the interior with a gradient.
SkPoint points[] = { { SkIntToScalar(0), SkIntToScalar(0) },
{ SkIntToScalar(0), SkIntToScalar(height()) } };
SkColor colors[] = { SkColorSetARGB(242, 255, 255, 255),
SkColorSetARGB(212, 255, 255, 255), };
SkShader* shader = SkGradientShader::CreateLinear(
points, colors, NULL, 2, SkShader::kRepeat_TileMode);
SkPaint paint;
paint.setShader(shader);
shader = NULL;
paint.setStyle(SkPaint::kFill_Style);
paint.setXfermodeMode(SkXfermode::kSrcOver_Mode);
canvas->drawPaint(paint);
// Restore the canvas (resetting the clip).
canvas->restore();
SkPaint paint2;
paint2.setStyle(SkPaint::kStroke_Style);
paint2.setAntiAlias(true);
paint2.setColor(SK_ColorWHITE);
paint2.setStrokeWidth(SkIntToScalar(0));
// And stroke the rounded rect with arrow pointing down.
canvas->drawPath(outline, paint2);
}
TabOverviewGrid* TabOverviewContainer::GetTabOverviewGrid() {
return static_cast<TabOverviewGrid*>(GetChildViewAt(0));
}
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