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Diffstat (limited to 'chromium/ash/wm/workspace/frame_maximize_button.h')
| -rw-r--r-- | chromium/ash/wm/workspace/frame_maximize_button.h | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/chromium/ash/wm/workspace/frame_maximize_button.h b/chromium/ash/wm/workspace/frame_maximize_button.h new file mode 100644 index 00000000000..f01df6c267a --- /dev/null +++ b/chromium/ash/wm/workspace/frame_maximize_button.h @@ -0,0 +1,183 @@ +// 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. + +#ifndef ASH_WM_WORKSPACE_FRAME_MAXIMIZE_BUTTON_H_ +#define ASH_WM_WORKSPACE_FRAME_MAXIMIZE_BUTTON_H_ + +#include "ash/ash_export.h" +#include "ash/wm/workspace/maximize_bubble_frame_state.h" +#include "ash/wm/workspace/snap_types.h" +#include "base/memory/scoped_ptr.h" +#include "base/timer/timer.h" +#include "ui/aura/window_observer.h" +#include "ui/views/controls/button/image_button.h" +#include "ui/views/widget/widget_observer.h" + +namespace views { +class NonClientFrameView; +} + +namespace ash { + +namespace internal { +class PhantomWindowController; +class SnapSizer; +} + +class MaximizeBubbleController; + +// Button used for the maximize control on the frame. Handles snapping logic. +class ASH_EXPORT FrameMaximizeButton : public views::ImageButton, + public views::WidgetObserver, + public aura::WindowObserver { + public: + FrameMaximizeButton(views::ButtonListener* listener, + views::NonClientFrameView* frame); + virtual ~FrameMaximizeButton(); + + // Updates |snap_type_| based on a a given snap type. This is used by + // external hover events from the button menu. + void SnapButtonHovered(SnapType type); + + // The user clicked the |type| button and the action needs to be performed, + // which will at the same time close the window. + void ExecuteSnapAndCloseMenu(SnapType type); + + // Remove the maximize menu from the screen (and destroy it). + void DestroyMaximizeMenu(); + + // Returns true when the user clicks and drags the button. + bool is_snap_enabled() const { return is_snap_enabled_; } + + // WindowObserver overrides: + virtual void OnWindowBoundsChanged(aura::Window* window, + const gfx::Rect& old_bounds, + const gfx::Rect& new_bounds) OVERRIDE; + virtual void OnWindowPropertyChanged(aura::Window* window, + const void* key, + intptr_t old) OVERRIDE; + virtual void OnWindowDestroying(aura::Window* window) OVERRIDE; + + // WidgetObserver overrides: + virtual void OnWidgetActivationChanged(views::Widget* widget, + bool active) OVERRIDE; + + // ImageButton overrides: + virtual bool OnMousePressed(const ui::MouseEvent& event) OVERRIDE; + virtual void OnMouseEntered(const ui::MouseEvent& event) OVERRIDE; + virtual void OnMouseExited(const ui::MouseEvent& event) OVERRIDE; + virtual bool OnMouseDragged(const ui::MouseEvent& event) OVERRIDE; + virtual void OnMouseReleased(const ui::MouseEvent& event) OVERRIDE; + virtual void OnMouseCaptureLost() OVERRIDE; + + // ui::EventHandler overrides: + virtual void OnGestureEvent(ui::GestureEvent* event) OVERRIDE; + + // views::View overwrite: + virtual void SetVisible(bool visible) OVERRIDE; + + // Unit test overwrite: Change the UI delay used for the bubble show up. + void set_bubble_appearance_delay_ms(int bubble_appearance_delay_ms) { + bubble_appearance_delay_ms_ = bubble_appearance_delay_ms; + } + + // Unit test accessor for the maximize bubble. + MaximizeBubbleController* maximizer() { return maximizer_.get(); } + + // Unit test to see if phantom window is open. + bool phantom_window_open() { return phantom_window_.get() != NULL; } + + private: + class EscapeEventFilter; + + // Initializes the snap-gesture based on the event. This should only be called + // when the event is confirmed to have started a snap gesture. + void ProcessStartEvent(const ui::LocatedEvent& event); + + // Updates the snap-state based on the current event. This should only be + // called after the snap gesture has already started. + void ProcessUpdateEvent(const ui::LocatedEvent& event); + + // Returns true if the window was snapped. Returns false otherwise. + bool ProcessEndEvent(const ui::LocatedEvent& event); + + // Cancels snap behavior. If |keep_menu_open| is set, a possibly opened + // bubble help will remain open. + void Cancel(bool keep_menu_open); + + // Installs/uninstalls an EventFilter to track when escape is pressed. + void InstallEventFilter(); + void UninstallEventFilter(); + + // Updates the snap position from the event location. This is invoked by + // |update_timer_|. + void UpdateSnapFromEventLocation(); + + // Updates |snap_type_| based on a mouse drag. If |select_default| is set, + // the single button click default setting of the snap sizer should be used. + // Set |is_touch| to true to make touch snapping at the corners possible. + void UpdateSnap(const gfx::Point& location, + bool select_default, + bool is_touch); + + // Returns the type of snap based on the specified location. + SnapType SnapTypeForLocation(const gfx::Point& location) const; + + // Returns the bounds of the resulting window for the specified type. + gfx::Rect ScreenBoundsForType(SnapType type, + const internal::SnapSizer& snap_sizer) const; + + // Converts location to screen coordinates and returns it. These are the + // coordinates used by the SnapSizer. + gfx::Point LocationForSnapSizer(const gfx::Point& location) const; + + // Snaps the window to the current snap position. + void Snap(const internal::SnapSizer& snap_sizer); + + // Determine the maximize type of this window. + MaximizeBubbleFrameState GetMaximizeBubbleFrameState() const; + + // Frame that the maximize button acts on. + views::NonClientFrameView* frame_; + + // Renders the snap position. + scoped_ptr<internal::PhantomWindowController> phantom_window_; + + // Is snapping enabled? Set on press so that in drag we know whether we + // should show the snap locations. + bool is_snap_enabled_; + + // Did the user drag far enough to trigger snapping? + bool exceeded_drag_threshold_; + + // Remember the widget on which we have put some an observers, + // so that we can remove it upon destruction. + views::Widget* widget_; + + // Location of the press. + gfx::Point press_location_; + + // True if the press was triggered by a gesture/touch. + bool press_is_gesture_; + + // Current snap type. + SnapType snap_type_; + + scoped_ptr<internal::SnapSizer> snap_sizer_; + + scoped_ptr<EscapeEventFilter> escape_event_filter_; + + base::OneShotTimer<FrameMaximizeButton> update_timer_; + + scoped_ptr<MaximizeBubbleController> maximizer_; + + // The delay of the bubble appearance. + int bubble_appearance_delay_ms_; + + DISALLOW_COPY_AND_ASSIGN(FrameMaximizeButton); +}; + +} // namespace ash + +#endif // ASH_WM_WORKSPACE_FRAME_MAXIMIZE_BUTTON_H_ |