chrome/browser/ui/cocoa/tabs/tab_strip_background_view.mm

   1 // Copyright 2014 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/tabs/tab_strip_background_view.h"
   6
   7 #import "chrome/browser/ui/cocoa/framed_browser_window.h"
   8 #import "ui/base/cocoa/nsview_additions.h"
   9
  10 @implementation TabStripBackgroundView
  11
  12 - (void)drawRect:(NSRect)dirtyRect {
  13   // Only the top corners are rounded. For simplicity, round all 4 corners but
  14   // draw the bottom corners outside of the visible bounds.
  15   float cornerRadius = 4.0;
  16   NSRect roundedRect = [self bounds];
  17   roundedRect.origin.y -= cornerRadius;
  18   roundedRect.size.height += cornerRadius;
  19   [[NSBezierPath bezierPathWithRoundedRect:roundedRect
  20                                    xRadius:cornerRadius
  21                                    yRadius:cornerRadius] addClip];
  22   BOOL themed = [FramedBrowserWindow drawWindowThemeInDirtyRect:dirtyRect
  23                                                         forView:self
  24                                                          bounds:roundedRect
  25                                            forceBlackBackground:NO];
  26
  27   // Draw a 1px border on the top edge and top corners.
  28   if (themed) {
  29     CGFloat lineWidth = [self cr_lineWidth];
  30     // Inset the vertical lines by 0.5px so that the top line gets a full pixel.
  31     // Outset the horizontal lines by 0.5px so that they are not visible, but
  32     // still get the rounded corners to get a border.
  33     NSRect strokeRect = NSInsetRect(roundedRect, -lineWidth/2, lineWidth/2);
  34     NSBezierPath* path = [NSBezierPath bezierPathWithRoundedRect:strokeRect
  35                                                          xRadius:cornerRadius
  36                                                          yRadius:cornerRadius];
  37     [path setLineWidth:lineWidth];
  38     [[NSColor colorWithCalibratedWhite:1.0 alpha:0.5] set];
  39     [path stroke];
  40   }
  41 }
  42
  43 // ThemedWindowDrawing implementation.
  44
  45 - (void)windowDidChangeTheme {
  46   [self setNeedsDisplay:YES];
  47 }
  48
  49 - (void)windowDidChangeActive {
  50   [self setNeedsDisplay:YES];
  51 }
  52
  53 @end