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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.
#include "views/controls/button/native_button.h"
#include "app/keyboard_codes.h"
#include "base/i18n/rtl.h"
#include "views/controls/native/native_view_host.h"
#if defined(OS_WIN)
#include "gfx/platform_font_win.h"
#elif defined(OS_LINUX)
#include <gdk/gdkkeysyms.h>
#include "views/screen.h"
#endif
namespace views {
#if defined(OS_WIN)
// The min size in DLUs comes from
// http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnwue/html/ch14e.asp
static const int kMinWidthDLUs = 50;
static const int kMinHeightDLUs = 14;
// Horizontal padding (on each side).
static const int kButtonBorderHWidth = 8;
#else
// Horizontal padding (on each side).
static const int kButtonBorderHWidth = 0;
#endif
// static
const char NativeButton::kViewClassName[] = "views/NativeButton";
////////////////////////////////////////////////////////////////////////////////
// NativeButton, public:
NativeButton::NativeButton(ButtonListener* listener)
: Button(listener),
native_wrapper_(NULL),
is_default_(false),
need_elevation_(false),
ignore_minimum_size_(false) {
InitBorder();
SetFocusable(true);
}
NativeButton::NativeButton(ButtonListener* listener, const std::wstring& label)
: Button(listener),
native_wrapper_(NULL),
is_default_(false),
need_elevation_(false),
ignore_minimum_size_(false) {
SetLabel(label); // SetLabel takes care of label layout in RTL UI.
InitBorder();
SetFocusable(true);
}
NativeButton::~NativeButton() {
}
void NativeButton::SetLabel(const std::wstring& label) {
label_ = label;
// Even though we create a flipped HWND for a native button when the locale
// is right-to-left, Windows does not render text for the button using a
// right-to-left context (perhaps because the parent HWND is not flipped).
// The result is that RTL strings containing punctuation marks are not
// displayed properly. For example, the string "...ABC" (where A, B and C are
// Hebrew characters) is displayed as "ABC..." which is incorrect.
//
// In order to overcome this problem, we mark the localized Hebrew strings as
// RTL strings explicitly (using the appropriate Unicode formatting) so that
// Windows displays the text correctly regardless of the HWND hierarchy.
std::wstring localized_label;
if (base::i18n::AdjustStringForLocaleDirection(label_, &localized_label))
label_ = localized_label;
if (native_wrapper_)
native_wrapper_->UpdateLabel();
// Update the accessible name whenever the label changes.
SetAccessibleName(label);
PreferredSizeChanged();
}
void NativeButton::SetIsDefault(bool is_default) {
if (is_default == is_default_)
return;
if (is_default)
AddAccelerator(Accelerator(app::VKEY_RETURN, false, false, false));
else
RemoveAccelerator(Accelerator(app::VKEY_RETURN, false, false, false));
SetAppearsAsDefault(is_default);
}
void NativeButton::SetNeedElevation(bool need_elevation) {
need_elevation_ = need_elevation;
if (native_wrapper_)
native_wrapper_->UpdateLabel();
PreferredSizeChanged();
}
void NativeButton::SetAppearsAsDefault(bool appears_as_default) {
is_default_ = appears_as_default;
if (native_wrapper_)
native_wrapper_->UpdateDefault();
PreferredSizeChanged();
}
void NativeButton::ButtonPressed() {
RequestFocus();
// TODO(beng): obtain mouse event flags for native buttons someday.
#if defined(OS_WIN)
DWORD pos = GetMessagePos();
POINTS points = MAKEPOINTS(pos);
gfx::Point cursor_point(points.x, points.y);
#elif defined(OS_LINUX)
gfx::Point cursor_point = Screen::GetCursorScreenPoint();
#endif
views::MouseEvent event(views::Event::ET_MOUSE_RELEASED,
cursor_point.x(), cursor_point.y(),
views::Event::EF_LEFT_BUTTON_DOWN);
NotifyClick(event);
}
////////////////////////////////////////////////////////////////////////////////
// NativeButton, View overrides:
gfx::Size NativeButton::GetPreferredSize() {
if (!native_wrapper_)
return gfx::Size();
gfx::Size sz = native_wrapper_->GetView()->GetPreferredSize();
// Add in the border size. (Do this before clamping the minimum size in case
// that clamping causes an increase in size that would include the borders.
gfx::Insets border = GetInsets();
sz.set_width(sz.width() + border.left() + border.right());
sz.set_height(sz.height() + border.top() + border.bottom());
#if defined(OS_WIN)
// Clamp the size returned to at least the minimum size.
if (!ignore_minimum_size_) {
gfx::PlatformFontWin* platform_font =
static_cast<gfx::PlatformFontWin*>(font_.platform_font());
sz.set_width(std::max(
sz.width(),
platform_font->horizontal_dlus_to_pixels(kMinWidthDLUs)));
sz.set_height(std::max(
sz.height(),
platform_font->vertical_dlus_to_pixels(kMinHeightDLUs)));
}
// GTK returns a meaningful preferred size so that we don't need to adjust
// the preferred size as we do on windows.
#endif
return sz;
}
void NativeButton::Layout() {
if (native_wrapper_) {
native_wrapper_->GetView()->SetBounds(0, 0, width(), height());
native_wrapper_->GetView()->Layout();
}
}
void NativeButton::SetEnabled(bool flag) {
Button::SetEnabled(flag);
if (native_wrapper_)
native_wrapper_->UpdateEnabled();
}
void NativeButton::ViewHierarchyChanged(bool is_add, View* parent,
View* child) {
if (is_add && !native_wrapper_ && GetWidget()) {
// The native wrapper's lifetime will be managed by the view hierarchy after
// we call AddChildView.
native_wrapper_ = CreateWrapper();
AddChildView(native_wrapper_->GetView());
}
}
std::string NativeButton::GetClassName() const {
return kViewClassName;
}
bool NativeButton::AcceleratorPressed(const Accelerator& accelerator) {
if (IsEnabled()) {
#if defined(OS_WIN)
DWORD pos = GetMessagePos();
POINTS points = MAKEPOINTS(pos);
gfx::Point cursor_point(points.x, points.y);
#elif defined(OS_LINUX)
gfx::Point cursor_point = Screen::GetCursorScreenPoint();
#endif
views::MouseEvent event(views::Event::ET_MOUSE_RELEASED,
cursor_point.x(), cursor_point.y(),
views::Event::EF_LEFT_BUTTON_DOWN);
NotifyClick(event);
return true;
}
return false;
}
void NativeButton::Focus() {
// Forward the focus to the wrapper.
if (native_wrapper_)
native_wrapper_->SetFocus();
else
Button::Focus(); // Will focus the RootView window (so we still get
// keyboard messages).
}
void NativeButton::PaintFocusBorder(gfx::Canvas* canvas) {
if (NativeViewHost::kRenderNativeControlFocus)
View::PaintFocusBorder(canvas);
}
////////////////////////////////////////////////////////////////////////////////
// NativeButton, protected:
NativeButtonWrapper* NativeButton::CreateWrapper() {
NativeButtonWrapper* native_wrapper =
NativeButtonWrapper::CreateNativeButtonWrapper(this);
native_wrapper->UpdateLabel();
native_wrapper->UpdateEnabled();
return native_wrapper;
}
void NativeButton::InitBorder() {
set_border(Border::CreateEmptyBorder(0, kButtonBorderHWidth, 0,
kButtonBorderHWidth));
}
} // namespace views
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