ui/app_list/cocoa/app_list_pager_view.h

   1 // Copyright 2013 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 UI_APP_LIST_COCOA_APP_LIST_PAGER_VIEW_H_
   6 #define UI_APP_LIST_COCOA_APP_LIST_PAGER_VIEW_H_
   7
   8 #import <Cocoa/Cocoa.h>
   9
  10 #import "ui/base/cocoa/tracking_area.h"
  11
  12 @class AppListPagerView;
  13
  14 // Delegate to obtain the visible portion of a page and respond to clicks.
  15 @protocol AppListPagerDelegate<NSObject>
  16
  17 // Returns the portion of a page that is visible, in the range (-1.0, 1.0].
  18 // Positive indicates the left side is visible, negative indicates the right.
  19 - (CGFloat)visiblePortionOfPage:(int)page;
  20
  21 // Invoked when the pager is clicked.
  22 - (void)onPagerClicked:(AppListPagerView*)sender;
  23
  24 @end
  25
  26 // AppListPagerView draws a button strip with buttons representing pages, and a
  27 // highlight that mirrors the visible portion of the page.
  28 @interface AppListPagerView : NSSegmentedControl {
  29  @private
  30   // Used to auto-select a segment on hover.
  31   ui::ScopedCrTrackingArea trackingArea_;
  32
  33   // The segment currently highlighted with a mouse hover, or -1 for none.
  34   NSInteger hoveredSegment_;
  35 }
  36
  37 // Returns -1 if |locationInWindow| is not over a segment. Otherwise returns the
  38 // segment index and highlights it.
  39 - (NSInteger)findAndHighlightSegmentAtLocation:(NSPoint)locationInWindow;
  40
  41 @end
  42
  43 #endif  // UI_APP_LIST_COCOA_APP_LIST_PAGER_VIEW_H_