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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/native_button.h"
#include "base/logging.h"
#include "chrome/common/gfx/chrome_canvas.h"
#include "chrome/common/l10n_util.h"
#include "chrome/common/resource_bundle.h"
#include "chrome/views/background.h"
namespace views {
const char NativeButton::kViewClassName[] = "chrome/views/NativeButton";
NativeButton::NativeButton(const std::wstring& label)
: enforce_dlu_min_size_(true) {
Init(label, false);
}
NativeButton::NativeButton(const std::wstring& label, bool is_default)
: enforce_dlu_min_size_(true) {
Init(label, is_default);
}
NativeButton::~NativeButton() {
}
std::string NativeButton::GetClassName() const {
return kViewClassName;
}
void NativeButton::SetListener(Listener *l) {
listener_ = l;
}
void NativeButton::SetPadding(CSize size) {
padding_ = size;
}
gfx::Size NativeButton::GetPreferredSize() {
HWND hwnd = GetNativeControlHWND();
if (hwnd) {
SIZE sz = {0, 0};
::SendMessage(hwnd,
BCM_GETIDEALSIZE,
0,
reinterpret_cast<LPARAM>(&sz));
sz.cx += 2 * padding_.cx;
sz.cy += 2 * padding_.cy;
if (enforce_dlu_min_size_) {
if (min_dlu_size_.width()) {
sz.cx =
std::max(static_cast<int>(sz.cx),
font_.horizontal_dlus_to_pixels(min_dlu_size_.width()));
}
if (min_dlu_size_.height())
sz.cy = std::max(static_cast<int>(sz.cy),
font_.vertical_dlus_to_pixels(min_dlu_size_.height()));
}
return gfx::Size(sz.cx, sz.cy);
}
return gfx::Size();
}
void NativeButton::SetLabel(const std::wstring& l) {
// 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 (l10n_util::AdjustStringForLocaleDirection(l, &localized_label))
label_.assign(localized_label);
else
label_.assign(l);
SetAccessibleName(l);
UpdateNativeButton();
}
const std::wstring NativeButton::GetLabel() const {
return label_;
}
HWND NativeButton::CreateNativeControl(HWND parent_container) {
DWORD flags = WS_CHILD | BS_PUSHBUTTON;
if (is_default_)
flags |= BS_DEFPUSHBUTTON;
HWND r = ::CreateWindowEx(GetAdditionalExStyle(), L"BUTTON", L"", flags, 0, 0,
width(), height(), parent_container, NULL,
NULL, NULL);
SendMessage(r, WM_SETFONT, reinterpret_cast<WPARAM>(font_.hfont()), FALSE);
ConfigureNativeButton(r);
return r;
}
LRESULT NativeButton::OnNotify(int w_param, LPNMHDR l_param) {
return 0;
}
LRESULT NativeButton::OnCommand(UINT code, int id, HWND source) {
if (code == BN_CLICKED)
Clicked();
return 0;
}
void NativeButton::UpdateNativeButton() {
HWND hwnd = GetNativeControlHWND();
if (hwnd)
ConfigureNativeButton(hwnd);
}
void NativeButton::ConfigureNativeButton(HWND hwnd) {
::SetWindowText(hwnd, label_.c_str());
}
void NativeButton::SetDefaultButton(bool is_default_button) {
if (is_default_button == is_default_)
return;
is_default_ = is_default_button;
if (is_default_button)
AddAccelerator(Accelerator(VK_RETURN, false, false, false));
else
RemoveAccelerator(Accelerator(VK_RETURN, false, false, false));
SendMessage(GetNativeControlHWND(), BM_SETSTYLE,
is_default_button ? BS_DEFPUSHBUTTON : BS_PUSHBUTTON, true);
}
bool NativeButton::AcceleratorPressed(const Accelerator& accelerator) {
if (enabled_) {
Clicked();
return true;
}
return false;
}
bool NativeButton::GetAccessibleRole(VARIANT* role) {
DCHECK(role);
role->vt = VT_I4;
role->lVal = ROLE_SYSTEM_PUSHBUTTON;
return true;
}
bool NativeButton::GetAccessibleName(std::wstring* name) {
if (!accessible_name_.empty()) {
*name = accessible_name_;
return true;
}
return false;
}
void NativeButton::SetAccessibleName(const std::wstring& name) {
accessible_name_.assign(name);
}
void NativeButton::Init(const std::wstring& label, bool is_default) {
// Marking the string as an RTL string if the locale is RTL. Refer to
// the comments in NativeButton::SetLabel for more details.
std::wstring localized_label;
if (l10n_util::AdjustStringForLocaleDirection(label, &localized_label))
label_.assign(localized_label);
else
label_.assign(label);
l10n_util::AdjustStringForLocaleDirection(label, &label_);
listener_ = NULL;
SetAccessibleName(label);
// The padding of 8 is a bit arbitrary, there appears to be no way to
// get a recommended padding, and this value varies greatly among windows
// dialogs.
//
// The min size in DLUs comes from
// http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnwue/html/ch14e.asp
padding_ = CSize(8, 0);
is_default_ = is_default;
min_dlu_size_.SetSize(50, 14);
SetFocusable(true);
if (is_default)
AddAccelerator(Accelerator(VK_RETURN, false, false, false));
}
void NativeButton::Clicked() {
DCHECK(enabled_);
// Give the focus to the button.
RequestFocus();
if (listener_)
listener_->ButtonPressed(this);
}
bool NativeButton::NotifyOnKeyDown() const {
return true;
}
bool NativeButton::OnKeyDown(int virtual_key_code) {
if (virtual_key_code == VK_RETURN) {
Clicked();
return true;
}
return false;
}
} // namespace views
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