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// Copyright (c) 2011 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/native_control_gtk.h"
#include <gtk/gtk.h>
#include "base/logging.h"
#include "ui/base/accessibility/accessibility_types.h"
#include "views/focus/focus_manager.h"
#include "views/widget/widget.h"
#if defined(TOUCH_UI)
namespace {
GdkEvent* MouseButtonEvent(const views::MouseEvent& mouseev,
const views::NativeViewHost* source) {
GdkEvent* event = NULL;
switch (mouseev.type()) {
case ui::ET_MOUSE_PRESSED:
event = gdk_event_new(GDK_BUTTON_PRESS);
break;
case ui::ET_MOUSE_RELEASED:
event = gdk_event_new(GDK_BUTTON_RELEASE);
break;
default:
NOTREACHED();
return NULL;
}
event->button.send_event = false;
event->button.time = GDK_CURRENT_TIME;
// Ideally using native_view()->window should work, but it doesn't.
event->button.window = gdk_window_at_pointer(NULL, NULL);
g_object_ref(event->button.window);
event->button.x = mouseev.location().x();
event->button.y = mouseev.location().y();
gfx::Point point = mouseev.location();
views::View::ConvertPointToScreen(source, &point);
event->button.x_root = point.x();
event->button.y_root = point.y();
event->button.axes = NULL;
// Ideally, this should reconstruct the state from mouseev.flags().
GdkModifierType modifier;
gdk_window_get_pointer(event->button.window, NULL, NULL, &modifier);
event->button.state = modifier;
event->button.button = (mouseev.flags() & ui::EF_LEFT_BUTTON_DOWN) ? 1 :
(mouseev.flags() & ui::EF_RIGHT_BUTTON_DOWN) ? 3 :
2;
event->button.device = gdk_device_get_core_pointer();
return event;
}
GdkEvent* MouseMoveEvent(const views::MouseEvent& mouseev,
const views::NativeViewHost* source) {
GdkEvent* event = gdk_event_new(GDK_MOTION_NOTIFY);
event->motion.send_event = false;
event->motion.time = GDK_CURRENT_TIME;
event->motion.window = source->native_view()->window;
g_object_ref(event->motion.window);
event->motion.x = mouseev.location().x();
event->motion.y = mouseev.location().y();
gfx::Point point = mouseev.location();
views::View::ConvertPointToScreen(source, &point);
event->motion.x_root = point.x();
event->motion.y_root = point.y();
event->motion.device = gdk_device_get_core_pointer();
return event;
}
GdkEvent* MouseCrossEvent(const views::MouseEvent& mouseev,
const views::NativeViewHost* source) {
GdkEvent* event = NULL;
switch (mouseev.type()) {
case ui::ET_MOUSE_ENTERED:
event = gdk_event_new(GDK_ENTER_NOTIFY);
break;
case ui::ET_MOUSE_EXITED:
event = gdk_event_new(GDK_LEAVE_NOTIFY);
break;
default:
NOTREACHED();
return NULL;
}
event->crossing.send_event = false;
event->crossing.time = GDK_CURRENT_TIME;
event->crossing.window = source->native_view()->window;
g_object_ref(event->crossing.window);
event->crossing.x = event->crossing.y = 0;
event->crossing.x_root = event->crossing.y_root = 0;
event->crossing.mode = GDK_CROSSING_NORMAL;
event->crossing.detail = GDK_NOTIFY_VIRTUAL;
event->crossing.focus = false;
event->crossing.state = 0;
return event;
}
} // namespace
#endif // defined(TOUCH_UI)
namespace views {
#if defined(TOUCH_UI)
void NativeControlGtk::FakeNativeMouseEvent(const MouseEvent& mouseev) {
GdkEvent* event = NULL;
switch (mouseev.type()) {
case ui::ET_MOUSE_PRESSED:
case ui::ET_MOUSE_RELEASED:
event = MouseButtonEvent(mouseev, this);
break;
case ui::ET_MOUSE_MOVED:
event = MouseMoveEvent(mouseev, this);
break;
case ui::ET_MOUSE_ENTERED:
case ui::ET_MOUSE_EXITED:
event = MouseCrossEvent(mouseev, this);
break;
default:
NOTREACHED();
return;
}
if (event) {
// Do not gdk_event_put, since that will end up going through the
// message-loop and turn into an infinite loop.
gtk_widget_event(native_view(), event);
gdk_event_free(event);
}
}
#endif // defined(TOUCH_UI)
NativeControlGtk::NativeControlGtk() {
}
NativeControlGtk::~NativeControlGtk() {
if (native_view())
gtk_widget_destroy(native_view());
}
////////////////////////////////////////////////////////////////////////////////
// NativeControlGtk, View overrides:
void NativeControlGtk::SetEnabled(bool enabled) {
if (IsEnabled() != enabled) {
View::SetEnabled(enabled);
if (native_view())
gtk_widget_set_sensitive(native_view(), IsEnabled());
}
}
void NativeControlGtk::ViewHierarchyChanged(bool is_add, View* parent,
View* child) {
// Call the base class to hide the view if we're being removed.
NativeViewHost::ViewHierarchyChanged(is_add, parent, child);
if (!is_add && child == this && native_view()) {
Detach();
} else if (is_add && GetWidget() && !native_view()) {
// Create the widget when we're added to a valid Widget. Many
// controls need a parent widget to function properly.
CreateNativeControl();
}
}
void NativeControlGtk::VisibilityChanged(View* starting_from, bool is_visible) {
if (!is_visible) {
if (native_view()) {
// We destroy the child widget when we become invisible because of the
// performance cost of maintaining widgets that aren't currently needed.
Detach();
// Make sure that Detach destroyed the widget.
DCHECK(!native_view());
}
} else if (!native_view()) {
if (GetWidget())
CreateNativeControl();
} else {
// The view becomes visible after native control is created.
// Layout now.
Layout();
}
}
void NativeControlGtk::OnFocus() {
DCHECK(native_view());
gtk_widget_grab_focus(native_view());
GetWidget()->NotifyAccessibilityEvent(
parent(), ui::AccessibilityTypes::EVENT_FOCUS, true);
}
#if defined(TOUCH_UI)
bool NativeControlGtk::OnMousePressed(const MouseEvent& mouseev) {
FakeNativeMouseEvent(mouseev);
return true;
}
void NativeControlGtk::OnMouseReleased(const MouseEvent& mouseev) {
FakeNativeMouseEvent(mouseev);
}
void NativeControlGtk::OnMouseMoved(const MouseEvent& mouseev) {
FakeNativeMouseEvent(mouseev);
}
void NativeControlGtk::OnMouseEntered(const MouseEvent& mouseev) {
FakeNativeMouseEvent(mouseev);
}
void NativeControlGtk::OnMouseExited(const MouseEvent& mouseev) {
FakeNativeMouseEvent(mouseev);
}
#endif // defined(TOUCH_UI)
void NativeControlGtk::NativeControlCreated(GtkWidget* native_control) {
Attach(native_control);
// Update the newly created GtkWidget with any resident enabled state.
gtk_widget_set_sensitive(native_view(), IsEnabled());
// Listen for focus change event to update the FocusManager focused view.
g_signal_connect(native_control, "focus-in-event",
G_CALLBACK(CallFocusIn), this);
}
// static
gboolean NativeControlGtk::CallFocusIn(GtkWidget* widget,
GdkEventFocus* event,
NativeControlGtk* control) {
FocusManager* focus_manager =
FocusManager::GetFocusManagerForNativeView(widget);
if (!focus_manager) {
// TODO(jcampan): http://crbug.com/21378 Reenable this NOTREACHED() when the
// options page is only based on views.
// NOTREACHED();
NOTIMPLEMENTED();
return false;
}
focus_manager->SetFocusedView(control->focus_view());
return false;
}
} // namespace views
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