ui/base/cocoa/base_view.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 #include "ui/base/cocoa/base_view.h"
   6
   7 NSString* kViewDidBecomeFirstResponder =
   8     @"Chromium.kViewDidBecomeFirstResponder";
   9 NSString* kSelectionDirection = @"Chromium.kSelectionDirection";
  10
  11 const int kTrackingOptions = NSTrackingMouseMoved |
  12                              NSTrackingMouseEnteredAndExited |
  13                              NSTrackingActiveAlways;
  14
  15 @implementation BaseView
  16
  17 - (void)dealloc {
  18   if (trackingArea_.get())
  19     [self removeTrackingArea:trackingArea_.get()];
  20   trackingArea_.reset(nil);
  21
  22   [super dealloc];
  23 }
  24
  25 - (void)mouseEvent:(NSEvent*)theEvent {
  26   // This method left intentionally blank.
  27 }
  28
  29 - (EventHandled)keyEvent:(NSEvent*)theEvent {
  30   // The default implementation of this method does not handle any key events.
  31   // Derived classes should return kEventHandled if they handled an event,
  32   // otherwise it will be forwarded on to |super|.
  33   return kEventNotHandled;
  34 }
  35
  36 - (void)mouseDown:(NSEvent*)theEvent {
  37   dragging_ = YES;
  38   [self mouseEvent:theEvent];
  39 }
  40
  41 - (void)rightMouseDown:(NSEvent*)theEvent {
  42   [self mouseEvent:theEvent];
  43 }
  44
  45 - (void)otherMouseDown:(NSEvent*)theEvent {
  46   [self mouseEvent:theEvent];
  47 }
  48
  49 - (void)mouseUp:(NSEvent*)theEvent {
  50   [self mouseEvent:theEvent];
  51
  52   dragging_ = NO;
  53   if (pendingExitEvent_.get()) {
  54     NSEvent* exitEvent =
  55         [NSEvent enterExitEventWithType:NSMouseExited
  56                                location:[theEvent locationInWindow]
  57                           modifierFlags:[theEvent modifierFlags]
  58                               timestamp:[theEvent timestamp]
  59                            windowNumber:[theEvent windowNumber]
  60                                 context:[theEvent context]
  61                             eventNumber:[pendingExitEvent_.get() eventNumber]
  62                          trackingNumber:[pendingExitEvent_.get() trackingNumber]
  63                                userData:[pendingExitEvent_.get() userData]];
  64     [self mouseEvent:exitEvent];
  65     pendingExitEvent_.reset();
  66   }
  67 }
  68
  69 - (void)rightMouseUp:(NSEvent*)theEvent {
  70   [self mouseEvent:theEvent];
  71 }
  72
  73 - (void)otherMouseUp:(NSEvent*)theEvent {
  74   [self mouseEvent:theEvent];
  75 }
  76
  77 - (void)mouseMoved:(NSEvent*)theEvent {
  78   [self mouseEvent:theEvent];
  79 }
  80
  81 - (void)mouseDragged:(NSEvent*)theEvent {
  82   [self mouseEvent:theEvent];
  83 }
  84
  85 - (void)rightMouseDragged:(NSEvent*)theEvent {
  86   [self mouseEvent:theEvent];
  87 }
  88
  89 - (void)otherMouseDragged:(NSEvent*)theEvent {
  90   [self mouseEvent:theEvent];
  91 }
  92
  93 - (void)mouseEntered:(NSEvent*)theEvent {
  94   if (pendingExitEvent_.get()) {
  95     pendingExitEvent_.reset();
  96     return;
  97   }
  98
  99   [self mouseEvent:theEvent];
 100 }
 101
 102 - (void)mouseExited:(NSEvent*)theEvent {
 103   // The tracking area will send an exit event even during a drag, which isn't
 104   // how the event flow for drags should work. This stores the exit event, and
 105   // sends it when the drag completes instead.
 106   if (dragging_) {
 107     pendingExitEvent_.reset([theEvent retain]);
 108     return;
 109   }
 110
 111   [self mouseEvent:theEvent];
 112 }
 113
 114 - (void)keyDown:(NSEvent*)theEvent {
 115   if ([self keyEvent:theEvent] != kEventHandled)
 116     [super keyDown:theEvent];
 117 }
 118
 119 - (void)keyUp:(NSEvent*)theEvent {
 120   if ([self keyEvent:theEvent] != kEventHandled)
 121     [super keyUp:theEvent];
 122 }
 123
 124 - (void)flagsChanged:(NSEvent*)theEvent {
 125   if ([self keyEvent:theEvent] != kEventHandled)
 126     [super flagsChanged:theEvent];
 127 }
 128
 129 - (gfx::Rect)flipNSRectToRect:(NSRect)rect {
 130   gfx::Rect new_rect(NSRectToCGRect(rect));
 131   new_rect.set_y(NSHeight([self bounds]) - new_rect.bottom());
 132   return new_rect;
 133 }
 134
 135 - (NSRect)flipRectToNSRect:(gfx::Rect)rect {
 136   NSRect new_rect(NSRectFromCGRect(rect.ToCGRect()));
 137   new_rect.origin.y = NSHeight([self bounds]) - NSMaxY(new_rect);
 138   return new_rect;
 139 }
 140
 141 - (void)updateTrackingAreas {
 142   [super updateTrackingAreas];
 143
 144   // NSTrackingInVisibleRect doesn't work correctly with Lion's window resizing,
 145   // http://crbug.com/176725 / http://openradar.appspot.com/radar?id=2773401 .
 146   // Tear down old tracking area and create a new one as workaround.
 147   if (trackingArea_.get())
 148     [self removeTrackingArea:trackingArea_.get()];
 149   trackingArea_.reset([[CrTrackingArea alloc] initWithRect:[self bounds]
 150                                                    options:kTrackingOptions
 151                                                      owner:self
 152                                                   userInfo:nil]);
 153   [self addTrackingArea:trackingArea_.get()];
 154 }
 155
 156 @end