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// Copyright 2014 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/browser/ui/views/panels/x11_panel_resizer.h"
#include "chrome/browser/ui/panels/panel.h"
#include "chrome/browser/ui/panels/panel_manager.h"
#include "ui/aura/window.h"
#include "ui/aura/window_delegate.h"
#include "ui/base/hit_test.h"
#include "ui/events/event.h"
#include "ui/events/event_utils.h"
#include "ui/views/view.h"
namespace {
// Returns true if the window can be resized via |component|.
bool IsWindowBorder(int component) {
return component == HTBOTTOM ||
component == HTBOTTOMLEFT ||
component == HTBOTTOMRIGHT ||
component == HTLEFT ||
component == HTRIGHT ||
component == HTTOP ||
component == HTTOPLEFT ||
component == HTTOPRIGHT;
}
} // namespace
X11PanelResizer::X11PanelResizer(Panel* panel, aura::Window* window)
: panel_(panel),
window_(window),
resize_state_(NOT_RESIZING),
resize_component_(HTNOWHERE) {
}
X11PanelResizer::~X11PanelResizer() {
StopResizing(NULL, true);
}
void X11PanelResizer::OnMousePressed(ui::MouseEvent* event) {
if (resize_state_ != NOT_RESIZING ||
event->type() != ui::ET_MOUSE_PRESSED ||
!event->IsLeftMouseButton() ||
!event->HasNativeEvent()) {
return;
}
int component = window_->delegate()->GetNonClientComponent(event->location());
if (!IsWindowBorder(component))
return;
// Set capture so that we get notified of all subsequent events.
window_->SetCapture();
resize_state_ = RESIZE_CAN_START;
initial_press_location_in_screen_ = ui::EventSystemLocationFromNative(
event->native_event());
resize_component_ = component;
event->StopPropagation();
}
void X11PanelResizer::OnMouseDragged(ui::MouseEvent* event) {
if (resize_state_ != RESIZE_CAN_START &&
resize_state_ != RESIZE_IN_PROGRESS) {
return;
}
if (!event->HasNativeEvent())
return;
// Get the location in screen coordinates from the XEvent because converting
// the mouse location to screen coordinates using ScreenPositionClient returns
// an incorrect location while the panel is moving. See crbug.com/353393 for
// more details.
// TODO: Fix conversion to screen coordinates.
gfx::Point location_in_screen = ui::EventSystemLocationFromNative(
event->native_event());
if (resize_state_ == RESIZE_CAN_START) {
gfx::Vector2d delta =
location_in_screen - initial_press_location_in_screen_;
if (views::View::ExceededDragThreshold(delta)) {
resize_state_ = RESIZE_IN_PROGRESS;
panel_->manager()->StartResizingByMouse(panel_, location_in_screen,
resize_component_);
}
}
if (resize_state_ == RESIZE_IN_PROGRESS)
panel_->manager()->ResizeByMouse(location_in_screen);
event->StopPropagation();
}
void X11PanelResizer::StopResizing(ui::MouseEvent* event, bool canceled) {
if (resize_state_ == NOT_RESIZING)
return;
if (resize_state_ == RESIZE_IN_PROGRESS) {
panel_->manager()->EndResizingByMouse(canceled);
window_->ReleaseCapture();
}
if (event)
event->StopPropagation();
resize_state_ = NOT_RESIZING;
}
void X11PanelResizer::OnMouseEvent(ui::MouseEvent* event) {
switch (event->type()) {
case ui::ET_MOUSE_PRESSED:
OnMousePressed(event);
break;
case ui::ET_MOUSE_DRAGGED:
OnMouseDragged(event);
break;
case ui::ET_MOUSE_RELEASED:
StopResizing(event, false);
break;
case ui::ET_MOUSE_CAPTURE_CHANGED:
StopResizing(event, true);
break;
default:
break;
}
}
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