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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/button.h"
#include <atlbase.h>
#include <atlapp.h>
#include "chrome/app/chrome_dll_resource.h"
#include "chrome/common/gfx/chrome_canvas.h"
#include "chrome/common/l10n_util.h"
#include "chrome/common/throb_animation.h"
#include "chrome/views/event.h"
#include "skia/ext/image_operations.h"
#include "generated_resources.h"
namespace views {
static const int kDefaultWidth = 16; // Default button width if no theme.
static const int kDefaultHeight = 14; // Default button height if no theme.
////////////////////////////////////////////////////////////////////////////////
//
// Button - constructors, destructors, initialization
//
////////////////////////////////////////////////////////////////////////////////
Button::Button() : BaseButton(),
h_alignment_(ALIGN_LEFT),
v_alignment_(ALIGN_TOP) {
// By default, we request that the ChromeCanvas passed to our View::Paint()
// implementation is flipped horizontally so that the button's bitmaps are
// mirrored when the UI directionality is right-to-left.
EnableCanvasFlippingForRTLUI(true);
}
Button::~Button() {
}
////////////////////////////////////////////////////////////////////////////////
//
// Button - properties
//
////////////////////////////////////////////////////////////////////////////////
void Button::SetImage(ButtonState aState, SkBitmap* anImage) {
images_[aState] = anImage ? *anImage : SkBitmap();
}
void Button::SetImageAlignment(HorizontalAlignment h_align,
VerticalAlignment v_align) {
h_alignment_ = h_align;
v_alignment_ = v_align;
SchedulePaint();
}
gfx::Size Button::GetPreferredSize() {
if (!images_[BS_NORMAL].isNull())
return gfx::Size(images_[BS_NORMAL].width(), images_[BS_NORMAL].height());
return gfx::Size(kDefaultWidth, kDefaultHeight);
}
// Set the tooltip text for this button.
void Button::SetTooltipText(const std::wstring& text) {
tooltip_text_ = text;
TooltipTextChanged();
}
// Return the tooltip text currently used by this button.
std::wstring Button::GetTooltipText() const {
return tooltip_text_;
}
////////////////////////////////////////////////////////////////////////////////
//
// Button - painting
//
////////////////////////////////////////////////////////////////////////////////
void Button::Paint(ChromeCanvas* canvas) {
View::Paint(canvas);
SkBitmap img = GetImageToPaint();
if (!img.isNull()) {
int x = 0, y = 0;
if (h_alignment_ == ALIGN_CENTER)
x = (width() - img.width()) / 2;
else if (h_alignment_ == ALIGN_RIGHT)
x = width() - img.width();
if (v_alignment_ == ALIGN_MIDDLE)
y = (height() - img.height()) / 2;
else if (v_alignment_ == ALIGN_BOTTOM)
y = height() - img.height();
canvas->DrawBitmapInt(img, x, y);
}
PaintFocusBorder(canvas);
}
SkBitmap Button::GetImageToPaint() {
SkBitmap img;
if (!images_[BS_HOT].isNull() && hover_animation_->IsAnimating()) {
img = gfx::ImageOperations::CreateBlendedBitmap(images_[BS_NORMAL],
images_[BS_HOT], hover_animation_->GetCurrentValue());
} else {
img = images_[GetState()];
}
return !img.isNull() ? img : images_[BS_NORMAL];
}
////////////////////////////////////////////////////////////////////////////////
//
// Button - accessibility
//
////////////////////////////////////////////////////////////////////////////////
bool Button::GetAccessibleDefaultAction(std::wstring* action) {
DCHECK(action);
action->assign(l10n_util::GetString(IDS_ACCACTION_PRESS));
return true;
}
bool Button::GetAccessibleRole(VARIANT* role) {
DCHECK(role);
role->vt = VT_I4;
role->lVal = ROLE_SYSTEM_PUSHBUTTON;
return true;
}
bool Button::GetTooltipText(int x, int y, std::wstring* tooltip) {
if (tooltip_text_.empty())
return false;
*tooltip = tooltip_text_;
return true;
}
////////////////////////////////////////////////////////////////////////////////
//
// ToggleButton
//
////////////////////////////////////////////////////////////////////////////////
ToggleButton::ToggleButton() : Button(), toggled_(false) {
}
ToggleButton::~ToggleButton() {
}
void ToggleButton::SetImage(ButtonState state, SkBitmap* image) {
if (toggled_) {
alternate_images_[state] = image ? *image : SkBitmap();
} else {
images_[state] = image ? *image : SkBitmap();
if (state_ == state)
SchedulePaint();
}
}
void ToggleButton::SetToggledImage(ButtonState state, SkBitmap* image) {
if (toggled_) {
images_[state] = image ? *image : SkBitmap();
if (state_ == state)
SchedulePaint();
} else {
alternate_images_[state] = image ? *image : SkBitmap();
}
}
bool ToggleButton::GetTooltipText(int x, int y, std::wstring* tooltip) {
if (!toggled_ || toggled_tooltip_text_.empty())
return Button::GetTooltipText(x, y, tooltip);
*tooltip = toggled_tooltip_text_;
return true;
}
void ToggleButton::SetToggled(bool toggled) {
if (toggled == toggled_)
return;
for (int i = 0; i < kButtonStateCount; ++i) {
SkBitmap temp = images_[i];
images_[i] = alternate_images_[i];
alternate_images_[i] = temp;
}
toggled_ = toggled;
SchedulePaint();
}
void ToggleButton::SetToggledTooltipText(const std::wstring& tooltip) {
toggled_tooltip_text_.assign(tooltip);
}
} // namespace views
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