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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 VIEWS_CONTROLS_LINK_H_
#define VIEWS_CONTROLS_LINK_H_
#pragma once
#include <string>
#include "views/controls/label.h"
namespace views {
class Link;
////////////////////////////////////////////////////////////////////////////////
//
// LinkController defines the method that should be implemented to
// receive a notification when a link is clicked
//
////////////////////////////////////////////////////////////////////////////////
class LinkController {
public:
virtual void LinkActivated(Link* source, int event_flags) = 0;
protected:
virtual ~LinkController() {}
};
////////////////////////////////////////////////////////////////////////////////
//
// Link class
//
// A Link is a label subclass that looks like an HTML link. It has a
// controller which is notified when a click occurs.
//
////////////////////////////////////////////////////////////////////////////////
class Link : public Label {
public:
Link();
explicit Link(const std::wstring& title);
virtual ~Link();
void SetController(LinkController* controller);
const LinkController* GetController();
// Overridden from View:
virtual bool OnMousePressed(const MouseEvent& event);
virtual bool OnMouseDragged(const MouseEvent& event);
virtual void OnMouseReleased(const MouseEvent& event,
bool canceled);
virtual bool OnKeyPressed(const KeyEvent& e);
virtual bool SkipDefaultKeyEventProcessing(const KeyEvent& e);
// Accessibility accessors, overridden from View:
virtual AccessibilityTypes::Role GetAccessibleRole();
virtual void SetFont(const gfx::Font& font);
// Set whether the link is enabled.
virtual void SetEnabled(bool f);
virtual gfx::NativeCursor GetCursorForPoint(Event::EventType event_type,
const gfx::Point& p);
virtual std::string GetClassName() const;
void SetHighlightedColor(const SkColor& color);
void SetDisabledColor(const SkColor& color);
void SetNormalColor(const SkColor& color);
// If you'll be displaying the link over some non-system background color,
// call this with the relevant color and the link will auto-set its colors to
// be readable.
void MakeReadableOverBackgroundColor(const SkColor& color);
static const char kViewClassName[];
private:
// A highlighted link is clicked.
void SetHighlighted(bool f);
// Make sure the label style matched the current state.
void ValidateStyle();
void Init();
LinkController* controller_;
// Whether the link is currently highlighted.
bool highlighted_;
// The color when the link is highlighted.
SkColor highlighted_color_;
// The color when the link is disabled.
SkColor disabled_color_;
// The color when the link is neither highlighted nor disabled.
SkColor normal_color_;
DISALLOW_COPY_AND_ASSIGN(Link);
};
} // namespace views
#endif // VIEWS_CONTROLS_LINK_H_
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