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// Copyright (c) 2009 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#import "chrome/browser/cocoa/delayedmenu_button.h"
#include "base/logging.h"
#include "base/scoped_nsobject.h"
#import "chrome/browser/cocoa/clickhold_button_cell.h"
@interface DelayedMenuButton (Private)
- (void)setupCell;
- (void)attachedMenuAction:(id)sender;
@end // @interface DelayedMenuButton (Private)
@implementation DelayedMenuButton
// Overrides:
+ (Class)cellClass {
return [ClickHoldButtonCell class];
}
- (id)init {
if ((self = [super init]))
[self setupCell];
return self;
}
- (id)initWithCoder:(NSCoder*)decoder {
if ((self = [super initWithCoder:decoder]))
[self setupCell];
return self;
}
- (id)initWithFrame:(NSRect)frameRect {
if ((self = [super initWithFrame:frameRect]))
[self setupCell];
return self;
}
- (void)dealloc {
[attachedMenu_ release];
[super dealloc];
}
- (void)awakeFromNib {
[self setupCell];
}
- (void)setCell:(NSCell*)cell {
[super setCell:cell];
[self setupCell];
}
// Accessors and mutators:
@synthesize attachedMenu = attachedMenu_;
// Don't synthesize for attachedMenuEnabled_; its mutator must do other things.
- (void)setAttachedMenuEnabled:(BOOL)enabled {
attachedMenuEnabled_ = enabled;
[[self cell] setEnableClickHold:attachedMenuEnabled_];
}
- (BOOL)attachedMenuEnabled {
return attachedMenuEnabled_;
}
@end // @implementation DelayedMenuButton
@implementation DelayedMenuButton (Private)
// Set up the button's cell if we've reached a point where it's been set.
- (void)setupCell {
ClickHoldButtonCell* cell = [self cell];
if (cell) {
DCHECK([cell isKindOfClass:[ClickHoldButtonCell class]]);
[self setEnabled:NO]; // Make the controller put in a menu and
// enable it explicitly. This also takes
// care of |[cell setEnableClickHold:]|.
[cell setClickHoldAction:@selector(attachedMenuAction:)];
[cell setClickHoldTarget:self];
}
}
// Display the menu.
- (void)attachedMenuAction:(id)sender {
// We shouldn't get here unless the menu is enabled.
DCHECK(attachedMenuEnabled_);
// If we don't have a menu (in which case the person using this control is
// being bad), just wait for a mouse up.
if (!attachedMenu_) {
LOG(WARNING) << "No menu available.";
[NSApp nextEventMatchingMask:NSLeftMouseUpMask
untilDate:[NSDate distantFuture]
inMode:NSEventTrackingRunLoopMode
dequeue:YES];
return;
}
// TODO(viettrungluu): We have some fudge factors below to make things line up
// (approximately). I wish I knew how to get rid of them. (Note that our view
// is flipped, and that frame should be in our coordinates.) The y/height is
// very odd, since it doesn't seem to respond to changes the way that it
// should. I don't understand it.
NSRect frame = [self convertRect:[self frame]
fromView:[self superview]];
frame.origin.x -= 2.0;
frame.size.height += 10.0;
// Make our pop-up button cell and set things up. This is, as of 10.5, the
// official Apple-recommended hack. Later, perhaps |-[NSMenu
// popUpMenuPositioningItem:atLocation:inView:]| may be a better option.
// However, using a pulldown has the benefit that Cocoa automatically places
// the menu correctly even when we're at the edge of the screen (including
// "dragging upwards" when the button is close to the bottom of the screen).
// A |scoped_nsobject| local variable cannot be used here because
// Accessibility on 10.5 grabs the NSPopUpButtonCell without retaining it, and
// uses it later. (This is fixed in 10.6.)
if (!popUpCell_.get()) {
popUpCell_.reset([[NSPopUpButtonCell alloc] initTextCell:@""
pullsDown:YES]);
}
DCHECK(popUpCell_.get());
[popUpCell_ setMenu:attachedMenu_];
[popUpCell_ selectItem:nil];
[popUpCell_ attachPopUpWithFrame:frame
inView:self];
[popUpCell_ performClickWithFrame:frame
inView:self];
}
@end // @implementation DelayedMenuButton (Private)
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