chrome/browser/ui/cocoa/info_bubble_view.mm

   1 // Copyright (c) 2012 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 #import "chrome/browser/ui/cocoa/info_bubble_view.h"
   6
   7 #include "base/logging.h"
   8 #import "third_party/google_toolbox_for_mac/src/AppKit/GTMNSBezierPath+RoundRect.h"
   9
  10 @implementation InfoBubbleView
  11
  12 @synthesize arrowLocation = arrowLocation_;
  13 @synthesize alignment = alignment_;
  14 @synthesize cornerFlags = cornerFlags_;
  15
  16 - (id)initWithFrame:(NSRect)frameRect {
  17   if ((self = [super initWithFrame:frameRect])) {
  18     arrowLocation_ = info_bubble::kTopLeft;
  19     alignment_ = info_bubble::kAlignArrowToAnchor;
  20     cornerFlags_ = info_bubble::kRoundedAllCorners;
  21     backgroundColor_.reset([[NSColor whiteColor] retain]);
  22   }
  23   return self;
  24 }
  25
  26 - (void)drawRect:(NSRect)rect {
  27   // Make room for the border to be seen.
  28   NSRect bounds = [self bounds];
  29   if (arrowLocation_ != info_bubble::kNoArrow) {
  30     bounds.size.height -= info_bubble::kBubbleArrowHeight;
  31   }
  32   rect.size.height -= info_bubble::kBubbleArrowHeight;
  33
  34   float topRadius = cornerFlags_ & info_bubble::kRoundedTopCorners ?
  35       info_bubble::kBubbleCornerRadius : 0;
  36   float bottomRadius = cornerFlags_ & info_bubble::kRoundedBottomCorners ?
  37       info_bubble::kBubbleCornerRadius : 0;
  38
  39   NSBezierPath* bezier =
  40       [NSBezierPath gtm_bezierPathWithRoundRect:bounds
  41                             topLeftCornerRadius:topRadius
  42                            topRightCornerRadius:topRadius
  43                          bottomLeftCornerRadius:bottomRadius
  44                         bottomRightCornerRadius:bottomRadius];
  45
  46   // Add the bubble arrow.
  47   CGFloat dX = 0;
  48   switch (arrowLocation_) {
  49     case info_bubble::kTopLeft:
  50       dX = info_bubble::kBubbleArrowXOffset;
  51       break;
  52     case info_bubble::kTopRight:
  53       dX = NSWidth(bounds) - info_bubble::kBubbleArrowXOffset -
  54           info_bubble::kBubbleArrowWidth;
  55       break;
  56     case info_bubble::kTopCenter:
  57       dX = NSMidX(bounds) - info_bubble::kBubbleArrowWidth / 2.0;
  58       break;
  59     case info_bubble::kNoArrow:
  60       break;
  61     default:
  62       NOTREACHED();
  63       break;
  64   }
  65   NSPoint arrowStart = NSMakePoint(NSMinX(bounds), NSMaxY(bounds));
  66   arrowStart.x += dX;
  67   [bezier moveToPoint:NSMakePoint(arrowStart.x, arrowStart.y)];
  68   if (arrowLocation_ != info_bubble::kNoArrow) {
  69     [bezier lineToPoint:NSMakePoint(arrowStart.x +
  70                                         info_bubble::kBubbleArrowWidth / 2.0,
  71                                     arrowStart.y +
  72                                         info_bubble::kBubbleArrowHeight)];
  73   }
  74   [bezier lineToPoint:NSMakePoint(arrowStart.x + info_bubble::kBubbleArrowWidth,
  75                                   arrowStart.y)];
  76   [bezier closePath];
  77   [backgroundColor_ set];
  78   [bezier fill];
  79 }
  80
  81 - (NSPoint)arrowTip {
  82   NSRect bounds = [self bounds];
  83   CGFloat tipXOffset =
  84       info_bubble::kBubbleArrowXOffset + info_bubble::kBubbleArrowWidth / 2.0;
  85   CGFloat xOffset = 0.0;
  86   switch(arrowLocation_) {
  87     case info_bubble::kTopRight:
  88       xOffset = NSMaxX(bounds) - tipXOffset;
  89       break;
  90     case info_bubble::kTopLeft:
  91       xOffset = NSMinX(bounds) + tipXOffset;
  92       break;
  93     case info_bubble::kTopCenter:
  94       xOffset = NSMidX(bounds);
  95       break;
  96     default:
  97       NOTREACHED();
  98       break;
  99   }
 100   NSPoint arrowTip = NSMakePoint(xOffset, NSMaxY(bounds));
 101   return arrowTip;
 102 }
 103
 104 - (NSColor*)backgroundColor {
 105   return backgroundColor_;
 106 }
 107
 108 - (void)setBackgroundColor:(NSColor*)backgroundColor {
 109   backgroundColor_.reset([backgroundColor retain]);
 110 }
 111
 112 @end