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// Copyright (c) 2012 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 "ash/wm/partial_screenshot_view.h"
#include "ash/screenshot_delegate.h"
#include "ash/shell.h"
#include "ash/shell_window_ids.h"
#include "ash/wm/partial_screenshot_event_filter.h"
#include "ui/aura/root_window.h"
#include "ui/aura/window.h"
#include "ui/base/events.h"
#include "ui/base/cursor/cursor.h"
#include "ui/gfx/canvas.h"
#include "ui/gfx/rect.h"
#include "ui/views/view.h"
#include "ui/views/widget/widget.h"
namespace ash {
PartialScreenshotView::PartialScreenshotView(
ScreenshotDelegate* screenshot_delegate)
: is_dragging_(false),
screenshot_delegate_(screenshot_delegate),
window_(NULL) {
}
PartialScreenshotView::~PartialScreenshotView() {
screenshot_delegate_ = NULL;
// Do not delete the |window_| here because |window_| has the
// ownership to this object. In case that finishing browser happens
// while |window_| != NULL, |window_| is still removed correctly by
// its parent container.
window_ = NULL;
}
// static
void PartialScreenshotView::StartPartialScreenshot(
ScreenshotDelegate* screenshot_delegate) {
views::Widget* widget = new views::Widget;
PartialScreenshotView* view = new PartialScreenshotView(
screenshot_delegate);
aura::RootWindow* root_window = Shell::GetActiveRootWindow();
views::Widget::InitParams params(
views::Widget::InitParams::TYPE_WINDOW_FRAMELESS);
params.transparent = true;
params.delegate = view;
// The partial screenshot rectangle has to be at the real top of
// the screen.
params.parent = Shell::GetContainer(
root_window,
internal::kShellWindowId_OverlayContainer);
widget->Init(params);
widget->SetContentsView(view);
widget->SetBounds(root_window->bounds());
widget->GetNativeView()->SetName("PartialScreenshotView");
widget->StackAtTop();
widget->Show();
// Captures mouse events in case that context menu already captures the
// events. This will close the context menu.
widget->GetNativeView()->SetCapture();
view->set_window(widget->GetNativeWindow());
Shell::GetInstance()->partial_screenshot_filter()->Activate(view);
}
void PartialScreenshotView::Cancel() {
DCHECK(window_);
window_->Hide();
Shell::GetInstance()->partial_screenshot_filter()->Deactivate();
MessageLoop::current()->DeleteSoon(FROM_HERE, window_);
}
gfx::NativeCursor PartialScreenshotView::GetCursor(
const views::MouseEvent& event) {
// Always use "crosshair" cursor.
return ui::kCursorCross;
}
void PartialScreenshotView::OnPaint(gfx::Canvas* canvas) {
if (is_dragging_) {
// Screenshot area representation: black rectangle with white
// rectangle inside. To avoid capturing these rectangles when mouse
// release, they should be outside of the actual capturing area.
gfx::Rect screenshot_rect = GetScreenshotRect();
screenshot_rect.Inset(-1, -1, -1, -1);
canvas->DrawRect(screenshot_rect, SK_ColorWHITE);
screenshot_rect.Inset(-1, -1, -1, -1);
canvas->DrawRect(screenshot_rect, SK_ColorBLACK);
}
}
void PartialScreenshotView::OnMouseCaptureLost() {
Cancel();
}
bool PartialScreenshotView::OnMousePressed(const views::MouseEvent& event) {
start_position_ = event.location();
return true;
}
bool PartialScreenshotView::OnMouseDragged(const views::MouseEvent& event) {
current_position_ = event.location();
SchedulePaint();
is_dragging_ = true;
return true;
}
bool PartialScreenshotView::OnMouseWheel(const views::MouseWheelEvent& event) {
// Do nothing but do not propagate events futhermore.
return true;
}
void PartialScreenshotView::OnMouseReleased(const views::MouseEvent& event) {
Cancel();
if (!is_dragging_)
return;
is_dragging_ = false;
if (screenshot_delegate_) {
aura::RootWindow *root_window = Shell::GetPrimaryRootWindow();
screenshot_delegate_->HandleTakePartialScreenshot(
root_window, root_window->bounds().Intersect(GetScreenshotRect()));
}
}
gfx::Rect PartialScreenshotView::GetScreenshotRect() const {
int left = std::min(start_position_.x(), current_position_.x());
int top = std::min(start_position_.y(), current_position_.y());
int width = ::abs(start_position_.x() - current_position_.x());
int height = ::abs(start_position_.y() - current_position_.y());
return gfx::Rect(left, top, width, height);
}
} // namespace ash
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