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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/image_button.h"
#include "app/throb_animation.h"
#include "gfx/canvas.h"
#include "gfx/skbitmap_operations.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.
////////////////////////////////////////////////////////////////////////////////
// ImageButton, public:
ImageButton::ImageButton(ButtonListener* listener)
: CustomButton(listener),
h_alignment_(ALIGN_LEFT),
v_alignment_(ALIGN_TOP),
preferred_size_(kDefaultWidth, kDefaultHeight) {
// By default, we request that the gfx::Canvas 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);
}
ImageButton::~ImageButton() {
}
void ImageButton::SetImage(ButtonState aState, const SkBitmap* anImage) {
images_[aState] = anImage ? *anImage : SkBitmap();
PreferredSizeChanged();
}
void ImageButton::SetBackground(SkColor color,
const SkBitmap* image,
const SkBitmap* mask) {
if (!image || !mask) {
background_image_.reset();
return;
}
background_image_ =
SkBitmapOperations::CreateButtonBackground(color, *image, *mask);
}
void ImageButton::SetImageAlignment(HorizontalAlignment h_align,
VerticalAlignment v_align) {
h_alignment_ = h_align;
v_alignment_ = v_align;
SchedulePaint();
}
////////////////////////////////////////////////////////////////////////////////
// ImageButton, View overrides:
gfx::Size ImageButton::GetPreferredSize() {
if (!images_[BS_NORMAL].isNull())
return gfx::Size(images_[BS_NORMAL].width(), images_[BS_NORMAL].height());
return preferred_size_;
}
void ImageButton::Paint(gfx::Canvas* canvas) {
// Call the base class first to paint any background/borders.
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();
if (!background_image_.empty())
canvas->DrawBitmapInt(background_image_, x, y);
canvas->DrawBitmapInt(img, x, y);
}
PaintFocusBorder(canvas);
}
////////////////////////////////////////////////////////////////////////////////
// ImageButton, protected:
SkBitmap ImageButton::GetImageToPaint() {
SkBitmap img;
if (!images_[BS_HOT].isNull() && hover_animation_->is_animating()) {
img = SkBitmapOperations::CreateBlendedBitmap(images_[BS_NORMAL],
images_[BS_HOT], hover_animation_->GetCurrentValue());
} else {
img = images_[state_];
}
return !img.isNull() ? img : images_[BS_NORMAL];
}
////////////////////////////////////////////////////////////////////////////////
// ToggleImageButton, public:
ToggleImageButton::ToggleImageButton(ButtonListener* listener)
: ImageButton(listener),
toggled_(false) {
}
ToggleImageButton::~ToggleImageButton() {
}
void ToggleImageButton::SetToggled(bool toggled) {
if (toggled == toggled_)
return;
for (int i = 0; i < BS_COUNT; ++i) {
SkBitmap temp = images_[i];
images_[i] = alternate_images_[i];
alternate_images_[i] = temp;
}
toggled_ = toggled;
SchedulePaint();
}
void ToggleImageButton::SetToggledImage(ButtonState state,
const SkBitmap* image) {
if (toggled_) {
images_[state] = image ? *image : SkBitmap();
if (state_ == state)
SchedulePaint();
} else {
alternate_images_[state] = image ? *image : SkBitmap();
}
}
void ToggleImageButton::SetToggledTooltipText(const std::wstring& tooltip) {
toggled_tooltip_text_.assign(tooltip);
}
////////////////////////////////////////////////////////////////////////////////
// ToggleImageButton, ImageButton overrides:
void ToggleImageButton::SetImage(ButtonState state, const SkBitmap* image) {
if (toggled_) {
alternate_images_[state] = image ? *image : SkBitmap();
} else {
images_[state] = image ? *image : SkBitmap();
if (state_ == state)
SchedulePaint();
}
PreferredSizeChanged();
}
////////////////////////////////////////////////////////////////////////////////
// ToggleImageButton, View overrides:
bool ToggleImageButton::GetTooltipText(const gfx::Point& p,
std::wstring* tooltip) {
if (!toggled_ || toggled_tooltip_text_.empty())
return Button::GetTooltipText(p, tooltip);
*tooltip = toggled_tooltip_text_;
return true;
}
} // namespace views
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