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// 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 CHROME_BROWSER_UI_VIEWS_TABS_TAB_H_
#define CHROME_BROWSER_UI_VIEWS_TABS_TAB_H_
#pragma once
#include <string>
#include "base/scoped_ptr.h"
#include "chrome/browser/views/tabs/base_tab.h"
#include "gfx/point.h"
class MultiAnimation;
class SlideAnimation;
///////////////////////////////////////////////////////////////////////////////
//
// TabRenderer
//
// A View that renders a Tab, either in a TabStrip or in a DraggedTabView.
//
///////////////////////////////////////////////////////////////////////////////
class Tab : public BaseTab {
public:
// The menu button's class name.
static const char kViewClassName[];
explicit Tab(TabController* controller);
virtual ~Tab();
// Start/stop the mini-tab title animation.
void StartMiniTabTitleAnimation();
void StopMiniTabTitleAnimation();
// Set the background offset used to match the image in the inactive tab
// to the frame image.
void SetBackgroundOffset(const gfx::Point& offset) {
background_offset_ = offset;
}
// Paints the icon. Most of the time you'll want to invoke Paint directly, but
// in certain situations this invoked outside of Paint.
void PaintIcon(gfx::Canvas* canvas);
// Returns the minimum possible size of a single unselected Tab.
static gfx::Size GetMinimumUnselectedSize();
// Returns the minimum possible size of a selected Tab. Selected tabs must
// always show a close button and have a larger minimum size than unselected
// tabs.
static gfx::Size GetMinimumSelectedSize();
// Returns the preferred size of a single Tab, assuming space is
// available.
static gfx::Size GetStandardSize();
// Returns the width for mini-tabs. Mini-tabs always have this width.
static int GetMiniWidth();
// Loads the images to be used for the tab background.
static void LoadTabImages();
protected:
virtual const gfx::Rect& title_bounds() const { return title_bounds_; }
// BaseTab overrides:
virtual void DataChanged(const TabRendererData& old);
private:
// Overridden from views::View:
virtual void Paint(gfx::Canvas* canvas);
virtual void Layout();
virtual void OnThemeChanged();
virtual std::string GetClassName() const { return kViewClassName; }
virtual bool HasHitTestMask() const;
virtual void GetHitTestMask(gfx::Path* path) const;
virtual bool GetTooltipTextOrigin(const gfx::Point& p, gfx::Point* origin);
// Paint various portions of the Tab
void PaintTabBackground(gfx::Canvas* canvas);
void PaintInactiveTabBackgroundWithTitleChange(gfx::Canvas* canvas);
void PaintInactiveTabBackground(gfx::Canvas* canvas);
void PaintActiveTabBackground(gfx::Canvas* canvas);
// Returns the number of favicon-size elements that can fit in the tab's
// current size.
int IconCapacity() const;
// Returns whether the Tab should display a favicon.
bool ShouldShowIcon() const;
// Returns whether the Tab should display a close button.
bool ShouldShowCloseBox() const;
// Gets the throb value for the tab. When a tab is not selected the
// active background is drawn at |GetThrobValue()|%. This is used for hover,
// mini tab title change and pulsing.
double GetThrobValue();
// The bounds of various sections of the display.
gfx::Rect favicon_bounds_;
gfx::Rect title_bounds_;
// The offset used to paint the inactive background image.
gfx::Point background_offset_;
// Hover animation.
scoped_ptr<SlideAnimation> hover_animation_;
// Animation used when the title of an inactive mini tab changes.
scoped_ptr<MultiAnimation> mini_title_animation_;
struct TabImage {
SkBitmap* image_l;
SkBitmap* image_c;
SkBitmap* image_r;
int l_width;
int r_width;
int y_offset;
};
static TabImage tab_active;
static TabImage tab_inactive;
static TabImage tab_alpha;
// Whether we're showing the icon. It is cached so that we can detect when it
// changes and layout appropriately.
bool showing_icon_;
// Whether we are showing the close button. It is cached so that we can
// detect when it changes and layout appropriately.
bool showing_close_button_;
// The current color of the close button.
SkColor close_button_color_;
static bool initialized_;
DISALLOW_COPY_AND_ASSIGN(Tab);
};
#endif // CHROME_BROWSER_UI_VIEWS_TABS_TAB_H_
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