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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.
#ifndef CHROME_BROWSER_GTK_TABS_TAB_BUTTON_GTK_H_
#define CHROME_BROWSER_GTK_TABS_TAB_BUTTON_GTK_H_
#include <gdk/gdk.h>
#include "base/gfx/rect.h"
#include "chrome/browser/tabs/tab_strip_model.h"
#include "chrome/common/gfx/chrome_canvas.h"
#include "skia/include/SkBitmap.h"
///////////////////////////////////////////////////////////////////////////////
// TabButtonGtk
//
// Performs hit-testing and rendering of a Tab button.
//
class TabButtonGtk {
public:
// Possible button states
enum ButtonState {
BS_NORMAL,
BS_HOT,
BS_PUSHED,
BS_COUNT
};
class Delegate {
public:
// Creates a clickable region of the button's visual representation used
// for hit-testing. Caller is responsible for destroying the region. If
// NULL is returned, the bounds of the button will be used for hit-testing.
virtual GdkRegion* MakeRegionForButton(
const TabButtonGtk* button) const = 0;
// Sent when the user activates the button, which is defined as a press
// and release of a mouse click over the button.
virtual void OnButtonActivate(const TabButtonGtk* button) = 0;
};
explicit TabButtonGtk(Delegate* delegate);
virtual ~TabButtonGtk();
// Returns the bounds of the button.
int x() const { return bounds_.x(); }
int y() const { return bounds_.y(); }
int width() const { return bounds_.width(); }
int height() const { return bounds_.height(); }
const gfx::Rect& bounds() const { return bounds_; }
// Sets the bounds of the button.
void set_bounds(const gfx::Rect& bounds) { bounds_ = bounds; }
// Checks whether |point| is inside the bounds of the button.
bool IsPointInBounds(const gfx::Point& point);
// Sent by the tabstrip when the mouse moves within this button. Mouse state
// is in |event|. Returns true if the tabstrip needs to be redrawn as a
// result of the motion.
bool OnMotionNotify(GdkEventMotion* event);
// Sent by the tabstrip when the mouse clicks within this button. Returns
// true if the tabstrip needs to be redrawn as a result of the click.
bool OnMousePress();
// Sent by the tabstrip when the mouse click is released.
void OnMouseRelease();
// Sent by the tabstrip when the mouse leaves this button. Returns true
// if the tabstrip needs to be redrawn as a result of the movement.
bool OnLeaveNotify();
// Paints the Tab button into |canvas|.
void Paint(ChromeCanvasPaint* canvas);
// Sets the image the button should use for the provided state.
void SetImage(ButtonState state, SkBitmap* bitmap);
private:
// When the tab animation completes, we send the widget a message to
// simulate a mouse moved event at the current mouse position. This tickles
// the button to show the "hot" state.
void HighlightTabButton();
// The images used to render the different states of this button.
SkBitmap images_[BS_COUNT];
// The current state of the button.
ButtonState state_;
// The current bounds of the button.
gfx::Rect bounds_;
// Set if the mouse is pressed anywhere inside the button.
bool mouse_pressed_;
// Delegate to receive button messages.
Delegate* delegate_;
DISALLOW_COPY_AND_ASSIGN(TabButtonGtk);
};
#endif // CHROME_BROWSER_GTK_TABS_TAB_BUTTON_GTK_H_
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