chrome/browser/ui/cocoa/new_tab_button.mm

   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 #import "chrome/browser/ui/cocoa/new_tab_button.h"
   6
   7 #import "chrome/browser/ui/cocoa/image_button_cell.h"
   8 #include "grit/theme_resources.h"
   9 #include "ui/base/resource/resource_bundle.h"
  10
  11 namespace {
  12
  13 NSImage* GetMaskImage() {
  14   ui::ResourceBundle& bundle = ui::ResourceBundle::GetSharedInstance();
  15   return bundle.GetNativeImageNamed(IDR_NEWTAB_BUTTON_MASK).ToNSImage();
  16 }
  17
  18 }
  19
  20 // A simple override of the ImageButtonCell to disable handling of
  21 // -mouseEntered.
  22 @interface NewTabButtonCell : ImageButtonCell
  23
  24 - (void)mouseEntered:(NSEvent*)theEvent;
  25
  26 @end
  27
  28 @implementation NewTabButtonCell
  29
  30 - (void)mouseEntered:(NSEvent*)theEvent {
  31   // Ignore this since the NTB enter is handled by the TabStripController.
  32 }
  33
  34 - (void)drawFocusRingMaskWithFrame:(NSRect)cellFrame inView:(NSView*)view {
  35   // Match the button's shape.
  36   [self drawImage:GetMaskImage() withFrame:cellFrame inView:view];
  37 }
  38
  39 @end
  40
  41
  42 @implementation NewTabButton
  43
  44 + (Class)cellClass {
  45   return [NewTabButtonCell class];
  46 }
  47
  48 - (BOOL)pointIsOverButton:(NSPoint)point {
  49   NSPoint localPoint = [self convertPoint:point fromView:[self superview]];
  50   NSRect pointRect = NSMakeRect(localPoint.x, localPoint.y, 1, 1);
  51   NSImage* buttonMask = GetMaskImage();
  52   NSRect destinationRect = NSMakeRect(
  53       (NSWidth(self.bounds) - [buttonMask size].width) / 2,
  54       (NSHeight(self.bounds) - [buttonMask size].height) / 2,
  55       [buttonMask size].width, [buttonMask size].height);
  56   return [buttonMask hitTestRect:pointRect
  57         withImageDestinationRect:destinationRect
  58                          context:nil
  59                            hints:nil
  60                          flipped:YES];
  61 }
  62
  63 // Override to only accept clicks within the bounds of the defined path, not
  64 // the entire bounding box. |aPoint| is in the superview's coordinate system.
  65 - (NSView*)hitTest:(NSPoint)aPoint {
  66   if ([self pointIsOverButton:aPoint])
  67     return [super hitTest:aPoint];
  68   return nil;
  69 }
  70
  71 // ThemedWindowDrawing implementation.
  72
  73 - (void)windowDidChangeTheme {
  74   [self setNeedsDisplay:YES];
  75 }
  76
  77 - (void)windowDidChangeActive {
  78   [self setNeedsDisplay:YES];
  79 }
  80
  81 @end