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// 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 "ui/views/examples/scroll_view_example.h"
#include "base/strings/stringprintf.h"
#include "base/strings/utf_string_conversions.h"
#include "ui/views/background.h"
#include "ui/views/controls/button/label_button.h"
#include "ui/views/controls/button/radio_button.h"
#include "ui/views/layout/grid_layout.h"
#include "ui/views/view.h"
using base::ASCIIToUTF16;
namespace views {
namespace examples {
// ScrollView's content, which draws gradient color on background.
// TODO(oshima): add child views as well.
class ScrollViewExample::ScrollableView : public View {
public:
ScrollableView() {
SetColor(SK_ColorRED, SK_ColorCYAN);
AddChildView(new LabelButton(NULL, ASCIIToUTF16("Button")));
AddChildView(new RadioButton(ASCIIToUTF16("Radio Button"), 0));
}
gfx::Size GetPreferredSize() const override {
return gfx::Size(width(), height());
}
void SetColor(SkColor from, SkColor to) {
set_background(Background::CreateVerticalGradientBackground(from, to));
}
void PlaceChildY(int index, int y) {
View* view = child_at(index);
gfx::Size size = view->GetPreferredSize();
view->SetBounds(0, y, size.width(), size.height());
}
void Layout() override {
PlaceChildY(0, 0);
PlaceChildY(1, height() / 2);
SizeToPreferredSize();
}
private:
DISALLOW_COPY_AND_ASSIGN(ScrollableView);
};
ScrollViewExample::ScrollViewExample() : ExampleBase("Scroll View") {
}
ScrollViewExample::~ScrollViewExample() {
}
void ScrollViewExample::CreateExampleView(View* container) {
wide_ = new LabelButton(this, ASCIIToUTF16("Wide"));
tall_ = new LabelButton(this, ASCIIToUTF16("Tall"));
big_square_ = new LabelButton(this, ASCIIToUTF16("Big Square"));
small_square_ = new LabelButton(this, ASCIIToUTF16("Small Square"));
scroll_to_ = new LabelButton(this, ASCIIToUTF16("Scroll to"));
scrollable_ = new ScrollableView();
scroll_view_ = new ScrollView();
scroll_view_->SetContents(scrollable_);
scrollable_->SetBounds(0, 0, 1000, 100);
scrollable_->SetColor(SK_ColorYELLOW, SK_ColorCYAN);
GridLayout* layout = new GridLayout(container);
container->SetLayoutManager(layout);
// Add scroll view.
ColumnSet* column_set = layout->AddColumnSet(0);
column_set->AddColumn(GridLayout::FILL, GridLayout::FILL, 1,
GridLayout::USE_PREF, 0, 0);
layout->StartRow(1, 0);
layout->AddView(scroll_view_);
// Add control buttons.
column_set = layout->AddColumnSet(1);
for (int i = 0; i < 5; i++) {
column_set->AddColumn(GridLayout::FILL, GridLayout::FILL, 1,
GridLayout::USE_PREF, 0, 0);
}
layout->StartRow(0, 1);
layout->AddView(wide_);
layout->AddView(tall_);
layout->AddView(big_square_);
layout->AddView(small_square_);
layout->AddView(scroll_to_);
}
void ScrollViewExample::ButtonPressed(Button* sender, const ui::Event& event) {
if (sender == wide_) {
scrollable_->SetBounds(0, 0, 1000, 100);
scrollable_->SetColor(SK_ColorYELLOW, SK_ColorCYAN);
} else if (sender == tall_) {
scrollable_->SetBounds(0, 0, 100, 1000);
scrollable_->SetColor(SK_ColorRED, SK_ColorCYAN);
} else if (sender == big_square_) {
scrollable_->SetBounds(0, 0, 1000, 1000);
scrollable_->SetColor(SK_ColorRED, SK_ColorGREEN);
} else if (sender == small_square_) {
scrollable_->SetBounds(0, 0, 100, 100);
scrollable_->SetColor(SK_ColorYELLOW, SK_ColorGREEN);
} else if (sender == scroll_to_) {
scroll_view_->contents()->ScrollRectToVisible(
gfx::Rect(20, 500, 1000, 500));
}
scroll_view_->Layout();
}
} // namespace examples
} // namespace views
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