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// Copyright (c) 2006-2008 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/views/link.h"
#include "base/scoped_ptr.h"
#include "chrome/common/gfx/chrome_font.h"
#include "chrome/views/event.h"
namespace views {
static HCURSOR g_hand_cursor = NULL;
// Default colors used for links.
static const SkColor kHighlightedColor = SkColorSetRGB(255, 0x00, 0x00);
static const SkColor kNormalColor = SkColorSetRGB(0, 51, 153);
static const SkColor kDisabledColor = SkColorSetRGB(0, 0, 0);
const char Link::kViewClassName[] = "chrome/views/Link";
Link::Link() : Label(L""),
controller_(NULL),
highlighted_(false),
highlighted_color_(kHighlightedColor),
disabled_color_(kDisabledColor),
normal_color_(kNormalColor) {
Init();
SetFocusable(true);
}
Link::Link(const std::wstring& title) : Label(title),
controller_(NULL),
highlighted_(false),
highlighted_color_(kHighlightedColor),
disabled_color_(kDisabledColor),
normal_color_(kNormalColor) {
Init();
SetFocusable(true);
}
void Link::Init() {
SetColor(normal_color_);
ValidateStyle();
}
Link::~Link() {
}
void Link::SetController(LinkController* controller) {
controller_ = controller;
}
const LinkController* Link::GetController() {
return controller_;
}
std::string Link::GetClassName() const {
return kViewClassName;
}
void Link::SetHighlightedColor(const SkColor& color) {
normal_color_ = color;
ValidateStyle();
}
void Link::SetDisabledColor(const SkColor& color) {
disabled_color_ = color;
ValidateStyle();
}
void Link::SetNormalColor(const SkColor& color) {
normal_color_ = color;
ValidateStyle();
}
bool Link::OnMousePressed(const MouseEvent& e) {
if (!enabled_ || (!e.IsLeftMouseButton() && !e.IsMiddleMouseButton()))
return false;
SetHighlighted(true);
return true;
}
bool Link::OnMouseDragged(const MouseEvent& e) {
SetHighlighted(enabled_ &&
(e.IsLeftMouseButton() || e.IsMiddleMouseButton()) &&
HitTest(e.location()));
return true;
}
void Link::OnMouseReleased(const MouseEvent& e, bool canceled) {
// Change the highlight first just in case this instance is deleted
// while calling the controller
SetHighlighted(false);
if (enabled_ && !canceled &&
(e.IsLeftMouseButton() || e.IsMiddleMouseButton()) &&
HitTest(e.location())) {
// Focus the link on click.
RequestFocus();
if (controller_)
controller_->LinkActivated(this, e.GetFlags());
}
}
bool Link::OnKeyPressed(const KeyEvent& e) {
if ((e.GetCharacter() == VK_SPACE) || (e.GetCharacter() == VK_RETURN)) {
SetHighlighted(false);
// Focus the link on key pressed.
RequestFocus();
if (controller_)
controller_->LinkActivated(this, e.GetFlags());
return true;
}
return false;
}
bool Link::OverrideAccelerator(const Accelerator& accelerator) {
return (accelerator.GetKeyCode() == VK_SPACE) ||
(accelerator.GetKeyCode() == VK_RETURN);
}
void Link::SetHighlighted(bool f) {
if (f != highlighted_) {
highlighted_ = f;
ValidateStyle();
SchedulePaint();
}
}
void Link::ValidateStyle() {
ChromeFont font = GetFont();
if (enabled_) {
if ((font.style() & ChromeFont::UNDERLINED) == 0) {
Label::SetFont(font.DeriveFont(0, font.style() |
ChromeFont::UNDERLINED));
}
} else {
if ((font.style() & ChromeFont::UNDERLINED) != 0) {
Label::SetFont(font.DeriveFont(0, font.style() &
~ChromeFont::UNDERLINED));
}
}
if (enabled_) {
if (highlighted_) {
Label::SetColor(highlighted_color_);
} else {
Label::SetColor(normal_color_);
}
} else {
Label::SetColor(disabled_color_);
}
}
void Link::SetFont(const ChromeFont& font) {
Label::SetFont(font);
ValidateStyle();
}
void Link::SetEnabled(bool f) {
if (f != enabled_) {
enabled_ = f;
ValidateStyle();
SchedulePaint();
}
}
HCURSOR Link::GetCursorForPoint(Event::EventType event_type, int x, int y) {
if (enabled_) {
if (!g_hand_cursor) {
g_hand_cursor = LoadCursor(NULL, IDC_HAND);
}
return g_hand_cursor;
} else {
return NULL;
}
}
} // namespace views
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