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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/checkbox.h"
#include "chrome/common/gfx/chrome_canvas.h"
#include "chrome/views/checkbox.h"
#include "chrome/views/hwnd_view.h"
#include "chrome/views/label.h"
// FIXME(ACW) there got be a better way to find out the check box sizes
static int kCheckBoxWidth = 13;
static int kCheckBoxHeight = 13;
static int kCheckBoxToLabel = 4;
namespace ChromeViews {
// Horizontal focus padding.
const int CheckBox::kFocusPaddingHorizontal = 2;
const int CheckBox::kFocusPaddingVertical = 1;
const char CheckBox::kViewClassName[] = "chrome/views/CheckBox";
CheckBox::CheckBox(const std::wstring& label)
: NativeButton(label),
is_selected_(false) {
// Note: we paint the label as a floating view
SetMinSizeFromDLUs(gfx::Size(0, 0));
label_ = new ChromeViews::Label(label);
label_->SetHorizontalAlignment(Label::ALIGN_LEFT);
}
CheckBox::~CheckBox() {
delete label_;
}
void CheckBox::SetMultiLine(bool multi_line) {
label_->SetMultiLine(multi_line);
}
// static
int CheckBox::GetTextIndent() {
return kCheckBoxWidth + kCheckBoxToLabel + kFocusPaddingHorizontal;
}
void CheckBox::SetIsSelected(bool f) {
if (f != is_selected_) {
is_selected_ = f;
UpdateNativeButton();
}
}
bool CheckBox::IsSelected() const {
return is_selected_;
}
std::string CheckBox::GetClassName() const {
return kViewClassName;
}
void CheckBox::Layout() {
int label_x = GetTextIndent();
label_->SetBounds(label_x, 0, std::max(0, width() - label_x), height());
if (hwnd_view_) {
int first_line_height = label_->GetFont().height();
hwnd_view_->SetBounds(0, ((first_line_height - kCheckBoxHeight) / 2) + 1,
kCheckBoxWidth, kCheckBoxHeight);
hwnd_view_->UpdateHWNDBounds();
}
}
void CheckBox::ComputeTextRect(gfx::Rect* out) {
gfx::Size s = label_->GetPreferredSize();
out->set_x(GetTextIndent());
out->set_y(kFocusPaddingVertical);
int new_width = std::min(width() - (kCheckBoxWidth + kCheckBoxToLabel),
s.width());
out->set_width(std::max(0, new_width));
out->set_height(s.height());
}
void CheckBox::Paint(ChromeCanvas* canvas) {
gfx::Rect r;
ComputeTextRect(&r);
// Paint the focus border if any.
if (HasFocus())
canvas->DrawFocusRect(r.x() - kFocusPaddingHorizontal,
r.y() - kFocusPaddingVertical,
r.width() + kFocusPaddingHorizontal * 2,
r.height() + kFocusPaddingVertical * 2);
PaintFloatingView(canvas, label_, r.x(), r.y(), r.width(), r.height());
}
void CheckBox::SetEnabled(bool enabled) {
if (enabled_ == enabled)
return;
NativeButton::SetEnabled(enabled);
label_->SetEnabled(enabled);
}
HWND CheckBox::CreateNativeControl(HWND parent_container) {
HWND r = ::CreateWindowEx(WS_EX_TRANSPARENT | GetAdditionalExStyle(),
L"BUTTON",
L"",
WS_CHILD | BS_CHECKBOX | WS_VISIBLE,
0, 0, width(), height(),
parent_container, NULL, NULL, NULL);
ConfigureNativeButton(r);
return r;
}
void CheckBox::ConfigureNativeButton(HWND hwnd) {
::SendMessage(hwnd,
static_cast<UINT>(BM_SETCHECK),
static_cast<WPARAM>(is_selected_ ? BST_CHECKED : BST_UNCHECKED),
0);
label_->SetText(GetLabel());
}
gfx::Size CheckBox::GetPreferredSize() {
gfx::Size prefsize = label_->GetPreferredSize();
prefsize.set_height(std::max(prefsize.height() + kFocusPaddingVertical * 2,
kCheckBoxHeight));
prefsize.Enlarge(GetTextIndent() * 2, 0);
return prefsize;
}
LRESULT CheckBox::OnCommand(UINT code, int id, HWND source) {
if (code == BN_CLICKED)
SetIsSelected(!is_selected_);
return NativeButton::OnCommand(code, id, source);
}
void CheckBox::HighlightButton(bool f) {
::SendMessage(GetNativeControlHWND(),
static_cast<UINT>(BM_SETSTATE),
static_cast<WPARAM>(f),
0);
}
bool CheckBox::LabelHitTest(const MouseEvent& event) {
CPoint p(event.x(), event.y());
gfx::Rect r;
ComputeTextRect(&r);
return r.Contains(event.x(), event.y());
}
void CheckBox::OnMouseEntered(const MouseEvent& event) {
HighlightButton(LabelHitTest(event));
}
void CheckBox::OnMouseMoved(const MouseEvent& event) {
HighlightButton(LabelHitTest(event));
}
void CheckBox::OnMouseExited(const MouseEvent& event) {
HighlightButton(false);
}
bool CheckBox::OnMousePressed(const MouseEvent& event) {
HighlightButton(LabelHitTest(event));
return true;
}
bool CheckBox::OnMouseDragged(const MouseEvent& event) {
HighlightButton(LabelHitTest(event));
return true;
}
void CheckBox::OnMouseReleased(const MouseEvent& event,
bool canceled) {
HighlightButton(false);
if (!canceled && LabelHitTest(event))
OnCommand(BN_CLICKED, 0, GetNativeControlHWND());
}
}
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