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Diffstat (limited to 'ui/views/events/event_gtk.cc')
| -rw-r--r-- | ui/views/events/event_gtk.cc | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/ui/views/events/event_gtk.cc b/ui/views/events/event_gtk.cc new file mode 100644 index 0000000..fb0c88a --- /dev/null +++ b/ui/views/events/event_gtk.cc @@ -0,0 +1,183 @@ +// 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/events/event.h" + +#include <gdk/gdk.h> + +#include "base/logging.h" +#include "ui/base/keycodes/keyboard_code_conversion_gtk.h" +#include "ui/gfx/point.h" + +namespace { + +unsigned int GetGdkStateFromNative(GdkEvent* gdk_event) { + switch (gdk_event->type) { + case GDK_KEY_PRESS: + case GDK_KEY_RELEASE: + return gdk_event->key.state; + case GDK_BUTTON_PRESS: + case GDK_2BUTTON_PRESS: + case GDK_3BUTTON_PRESS: + case GDK_BUTTON_RELEASE: + return gdk_event->button.state; + case GDK_SCROLL: + return gdk_event->scroll.state; + case GDK_MOTION_NOTIFY: + return gdk_event->motion.state; + case GDK_ENTER_NOTIFY: + case GDK_LEAVE_NOTIFY: + return gdk_event->crossing.state; + default: + NOTREACHED(); + break; + } + return 0; +} + +int GetFlagsFromGdkState(unsigned int state) { + int flags = 0; + flags |= (state & GDK_LOCK_MASK) ? ui::EF_CAPS_LOCK_DOWN : 0; + flags |= (state & GDK_CONTROL_MASK) ? ui::EF_CONTROL_DOWN : 0; + flags |= (state & GDK_SHIFT_MASK) ? ui::EF_SHIFT_DOWN : 0; + flags |= (state & GDK_MOD1_MASK) ? ui::EF_ALT_DOWN : 0; + flags |= (state & GDK_BUTTON1_MASK) ? ui::EF_LEFT_BUTTON_DOWN : 0; + flags |= (state & GDK_BUTTON2_MASK) ? ui::EF_MIDDLE_BUTTON_DOWN : 0; + flags |= (state & GDK_BUTTON3_MASK) ? ui::EF_RIGHT_BUTTON_DOWN : 0; + return flags; +} + +//////////////////////////////////////////////////////////////////////////////// +// These functions mirror ui/base/events.h, but GTK is in the midst of removal. + +ui::EventType EventTypeFromNative(GdkEvent* gdk_event) { + // Add new event types as necessary. + switch (gdk_event->type) { + case GDK_2BUTTON_PRESS: + case GDK_3BUTTON_PRESS: + case GDK_BUTTON_PRESS: + return ui::ET_MOUSE_PRESSED; + case GDK_BUTTON_RELEASE: + return ui::ET_MOUSE_RELEASED; + case GDK_DRAG_MOTION: + return ui::ET_MOUSE_DRAGGED; + case GDK_ENTER_NOTIFY: + return ui::ET_MOUSE_ENTERED; + case GDK_KEY_PRESS: + return ui::ET_KEY_PRESSED; + case GDK_KEY_RELEASE: + return ui::ET_KEY_RELEASED; + case GDK_LEAVE_NOTIFY: + return ui::ET_MOUSE_EXITED; + case GDK_MOTION_NOTIFY: + if (gdk_event->motion.state & GDK_BUTTON1_MASK || + gdk_event->motion.state & GDK_BUTTON2_MASK || + gdk_event->motion.state & GDK_BUTTON3_MASK || + gdk_event->motion.state & GDK_BUTTON4_MASK || + gdk_event->motion.state & GDK_BUTTON5_MASK) { + return ui::ET_MOUSE_DRAGGED; + } + return ui::ET_MOUSE_MOVED; + case GDK_SCROLL: + return ui::ET_MOUSEWHEEL; + default: + NOTREACHED(); + break; + } + return ui::ET_UNKNOWN; +} + +int EventFlagsFromNative(GdkEvent* gdk_event) { + int flags = GetFlagsFromGdkState(GetGdkStateFromNative(gdk_event)); + if (gdk_event->type == GDK_2BUTTON_PRESS) + flags |= ui::EF_IS_DOUBLE_CLICK; + if (gdk_event->type == GDK_BUTTON_PRESS || + gdk_event->type == GDK_2BUTTON_PRESS || + gdk_event->type == GDK_3BUTTON_PRESS || + gdk_event->type == GDK_BUTTON_RELEASE) { + switch (gdk_event->button.button) { + case 1: + return flags | ui::EF_LEFT_BUTTON_DOWN; + case 2: + return flags | ui::EF_MIDDLE_BUTTON_DOWN; + case 3: + return flags | ui::EF_RIGHT_BUTTON_DOWN; + } + } + return flags; +} + +gfx::Point EventLocationFromNative(GdkEvent* gdk_event) { + double x = 0, y = 0; + if (gdk_event_get_coords(gdk_event, &x, &y)) + return gfx::Point(static_cast<int>(x), static_cast<int>(y)); + return gfx::Point(); +} + +ui::KeyboardCode KeyboardCodeFromNative(GdkEvent* gdk_event) { + DCHECK(gdk_event->type == GDK_KEY_PRESS || + gdk_event->type == GDK_KEY_RELEASE); + return ui::KeyboardCodeFromGdkEventKey(&gdk_event->key); +} + +int GetMouseWheelOffset(GdkEvent* gdk_event) { + DCHECK(gdk_event->type == GDK_SCROLL); + int offset = (gdk_event->scroll.direction == GDK_SCROLL_UP || + gdk_event->scroll.direction == GDK_SCROLL_LEFT) ? 1 : -1; + return offset; +} + +} // namespace + +namespace views { + +//////////////////////////////////////////////////////////////////////////////// +// Event, protected: + +Event::Event(GdkEvent* gdk_event, ui::EventType type, int flags) + : native_event_(NULL), + gdk_event_(gdk_event), + type_(type), + time_stamp_(base::Time::NowFromSystemTime()), + flags_(flags) { +} + +//////////////////////////////////////////////////////////////////////////////// +// LocatedEvent, protected: + +LocatedEvent::LocatedEvent(GdkEvent* gdk_event) + : Event(gdk_event, + EventTypeFromNative(gdk_event), + EventFlagsFromNative(gdk_event)), + location_(EventLocationFromNative(gdk_event)) { +} + +//////////////////////////////////////////////////////////////////////////////// +// KeyEvent, public: + +KeyEvent::KeyEvent(GdkEvent* gdk_event) + : Event(gdk_event, + EventTypeFromNative(gdk_event), + EventFlagsFromNative(gdk_event)), + key_code_(KeyboardCodeFromNative(gdk_event)), + character_(0), + unmodified_character_(0) { +} + +//////////////////////////////////////////////////////////////////////////////// +// MouseEvent, public: + +MouseEvent::MouseEvent(GdkEvent* gdk_event) + : LocatedEvent(gdk_event) { +} + +//////////////////////////////////////////////////////////////////////////////// +// MouseWheelEvent, public: + +MouseWheelEvent::MouseWheelEvent(GdkEvent* gdk_event) + : MouseEvent(gdk_event), + offset_(kWheelDelta * GetMouseWheelOffset(gdk_event)) { +} + +} // namespace views |