From 1ae99501e0a15b85f0593a71c939063027c802d4 Mon Sep 17 00:00:00 2001
From: "pinkerton@chromium.org"
<pinkerton@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98>
Date: Tue, 19 May 2009 20:46:37 +0000
Subject: Implement a status throbber on the mac, currently using the Win
artwork. Made the tab cell use a generic NSView for showing the icon instead
of relying on the NSButtonCell to draw it, so a NSImageView is in place by
default. Remove un-needed outlets, bindings, and views from the nib.
BUG=11916. TEST=loading pages, opening and closing tabs. Review URL:
http://codereview.chromium.org/115527
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@16410 0039d316-1c4b-4281-b951-d872f2087c98
---
chrome/browser/cocoa/throbber_view.mm | 88 +++++++++++++++++++++++++++++++++++
1 file changed, 88 insertions(+)
create mode 100644 chrome/browser/cocoa/throbber_view.mm
(limited to 'chrome/browser/cocoa/throbber_view.mm')
diff --git a/chrome/browser/cocoa/throbber_view.mm b/chrome/browser/cocoa/throbber_view.mm
new file mode 100644
index 0000000..948dcb4
--- /dev/null
+++ b/chrome/browser/cocoa/throbber_view.mm
@@ -0,0 +1,88 @@
+// 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/throbber_view.h"
+
+#include "base/logging.h"
+
+const float kAnimationIntervalSeconds = 0.03; // 30ms, same as windows
+
+@interface ThrobberView(PrivateMethods)
+- (void)animate;
+@end
+
+// A very simple object that is the target for the animation timer so that
+// the view isn't. We do this to avoid retain cycles as the timer
+// retains its target.
+@interface TimerTarget : NSObject {
+ @private
+ ThrobberView* throbber_; // Weak, owns us
+}
+- (id)initWithThrobber:(ThrobberView*)view;
+@end
+
+@implementation TimerTarget
+- (id)initWithThrobber:(ThrobberView*)view {
+ if ((self = [super init])) {
+ throbber_ = view;
+ }
+ return self;
+}
+
+- (void)animate:(NSTimer*)timer {
+ [throbber_ animate];
+}
+@end
+
+@implementation ThrobberView
+
+- (id)initWithFrame:(NSRect)frame image:(NSImage*)image {
+ if ((self = [super initWithFrame:frame])) {
+ // Ensure that the height divides evenly into the width. Cache the
+ // number of frames in the animation for later.
+ NSSize imageSize = [image size];
+ DCHECK(imageSize.height && imageSize.width);
+ if (!imageSize.height)
+ return nil;
+ DCHECK((int)imageSize.width % (int)imageSize.height == 0);
+ numFrames_ = (int)imageSize.width / (int)imageSize.height;
+ DCHECK(numFrames_);
+ image_.reset([image retain]);
+
+ // Start a timer for the animation frames.
+ target_.reset([[TimerTarget alloc] initWithThrobber:self]);
+ timer_ =
+ [NSTimer scheduledTimerWithTimeInterval:kAnimationIntervalSeconds
+ target:target_.get()
+ selector:@selector(animate:)
+ userInfo:nil
+ repeats:YES];
+ }
+ return self;
+}
+
+- (void)dealloc {
+ [timer_ invalidate];
+ [super dealloc];
+}
+
+// Called when the TimerTarget gets tickled by our timer. Increment the frame
+// counter and mark as needing display.
+- (void)animate {
+ animationFrame_ = ++animationFrame_ % numFrames_;
+ [self setNeedsDisplay:YES];
+}
+
+// Overridden to draw the appropriate frame in the image strip.
+- (void)drawRect:(NSRect)rect {
+ float imageDimension = [image_ size].height;
+ float xOffset = animationFrame_ * imageDimension;
+ NSRect sourceImageRect =
+ NSMakeRect(xOffset, 0, imageDimension, imageDimension);
+ [image_ compositeToPoint:NSMakePoint(0, 0)
+ fromRect:sourceImageRect
+ operation:NSCompositeSourceOver];
+}
+
+@end
--
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