chrome/browser/ui/cocoa/tabs/tab_strip_drag_controller.h

   1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_BROWSER_UI_COCOA_TABS_TAB_STRIP_DRAG_CONTROLLER_H_
   6 #define CHROME_BROWSER_UI_COCOA_TABS_TAB_STRIP_DRAG_CONTROLLER_H_
   7
   8 #import <Cocoa/Cocoa.h>
   9 #include <map>
  10
  11 @class TabController;
  12 @class TabStripController;
  13 @class TabWindowController;
  14
  15 ////////////////////////////////////////////////////////////////////////////////
  16
  17 // This protocol is used to carry mouse events to the TabStripDragController,
  18 // which manages the logic for actually dragging tabs.
  19 @protocol TabDraggingEventTarget
  20
  21 // Returns YES if the tab represented by the controller can be dragged.
  22 - (BOOL)tabCanBeDragged:(TabController*)tab;
  23
  24 // Initiates a dragging session with a mouseDown event. The tab controller
  25 // passed here is the one used for the rest of the dragging session.
  26 - (void)maybeStartDrag:(NSEvent*)event forTab:(TabController*)tab;
  27
  28 @end
  29
  30 ////////////////////////////////////////////////////////////////////////////////
  31
  32 // This controller is owned by the TabStripController and is used to delegate
  33 // all the logic for tab dragging from the TabView's events.
  34 @interface TabStripDragController : NSObject<TabDraggingEventTarget> {
  35  @private
  36   TabStripController* tabStrip_;  // Weak; owns this.
  37
  38   // These are released on mouseUp:
  39   BOOL moveWindowOnDrag_;  // Set if the only tab of a window is dragged.
  40   BOOL tabWasDragged_;  // Has the tab been dragged?
  41   BOOL draggingWithinTabStrip_;  // Did drag stay in the current tab strip?
  42   BOOL chromeIsVisible_;
  43
  44   NSTimeInterval tearTime_;  // Time since tear happened
  45   NSPoint tearOrigin_;  // Origin of the tear rect
  46   NSPoint dragOrigin_;  // Origin point of the drag
  47
  48   TabWindowController* sourceController_;  // weak. controller starting the drag
  49   NSWindow* sourceWindow_;  // Weak. The window starting the drag.
  50   NSRect sourceWindowFrame_;
  51   NSRect sourceTabFrame_;
  52
  53   TabController* draggedTab_;  // Weak. The tab controller being dragged.
  54
  55   TabWindowController* draggedController_;  // Weak. Controller being dragged.
  56   NSWindow* dragWindow_;  // Weak. The window being dragged
  57   NSWindow* dragOverlay_;  // Weak. The overlay being dragged
  58
  59   TabWindowController* targetController_;  // weak. Controller being targeted
  60 }
  61
  62 // Designated initializer.
  63 - (id)initWithTabStripController:(TabStripController*)controller;
  64
  65 // TabDraggingEventTarget methods are also implemented.
  66
  67 @end
  68
  69 #endif  // CHROME_BROWSER_UI_COCOA_TABS_TAB_STRIP_DRAG_CONTROLLER_H_