diff options
author | gtm.daemon <gtm.daemon@7dc7ac4e-7543-0410-b95c-c1676fc8e2a3> | 2011-08-24 16:00:31 +0000 |
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committer | gtm.daemon <gtm.daemon@7dc7ac4e-7543-0410-b95c-c1676fc8e2a3> | 2011-08-24 16:00:31 +0000 |
commit | d75eaf5688872bd6fe245e11c048c40817b7ee1b (patch) | |
tree | dce81e16a511779eb804dbc14e4971f8c61c2077 /iPhone | |
parent | 5254e4910abd5fbb5d915ff033edd9212bf0d7fd (diff) |
[Author: justincohen]
Fade to translucent mask used by chrome instead of an ellipses or just truncating the string.
R=dmaclach
APPROVED=dmaclach
DELTA=249 (249 added, 0 deleted, 0 changed)
Diffstat (limited to 'iPhone')
-rwxr-xr-x | iPhone/GTMFadeTruncatingLabel.h | 32 | ||||
-rwxr-xr-x | iPhone/GTMFadeTruncatingLabel.m | 115 | ||||
-rw-r--r-- | iPhone/GTMFadeTruncatingLabelTest.m | 67 | ||||
-rw-r--r-- | iPhone/TestData/GTMFadeTruncatingLabelTest1.png | bin | 0 -> 2788 bytes | |||
-rw-r--r-- | iPhone/TestData/GTMFadeTruncatingLabelTest2.png | bin | 0 -> 1569 bytes | |||
-rw-r--r-- | iPhone/TestData/GTMFadeTruncatingLabelTest3.png | bin | 0 -> 3289 bytes | |||
-rw-r--r-- | iPhone/TestData/GTMFadeTruncatingLabelTest4.png | bin | 0 -> 1919 bytes | |||
-rw-r--r-- | iPhone/TestData/GTMFadeTruncatingLabelTest5.png | bin | 0 -> 2665 bytes |
8 files changed, 214 insertions, 0 deletions
diff --git a/iPhone/GTMFadeTruncatingLabel.h b/iPhone/GTMFadeTruncatingLabel.h new file mode 100755 index 0000000..5b768f0 --- /dev/null +++ b/iPhone/GTMFadeTruncatingLabel.h @@ -0,0 +1,32 @@ +// +// GTMFadeTruncatingLabel.h +// +// Copyright 2011 Google Inc. +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations under +// the License. +// + +#import <UIKit/UIKit.h> + +typedef enum { + GTMFadeTruncatingTail = 0x1, + GTMFadeTruncatingHead = 0x2, + GTMFadeTruncatingHeadAndTail = GTMFadeTruncatingHead | GTMFadeTruncatingTail +} GTMFadeTruncatingMode; + +@interface GTMFadeTruncatingLabel : UILabel + +// Which side(s) to truncate. +@property(nonatomic, assign) GTMFadeTruncatingMode truncateMode; + +@end diff --git a/iPhone/GTMFadeTruncatingLabel.m b/iPhone/GTMFadeTruncatingLabel.m new file mode 100755 index 0000000..619e7bb --- /dev/null +++ b/iPhone/GTMFadeTruncatingLabel.m @@ -0,0 +1,115 @@ +// +// GTMFadeTruncatingLabel.m +// +// Copyright 2011 Google Inc. +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations under +// the License. +// +#import "GTMFadeTruncatingLabel.h" + +@interface GTMFadeTruncatingLabel () +- (void)setup; +- (UIImage*)getLinearGradient:(CGRect)rect; +@end + +@implementation GTMFadeTruncatingLabel + +@synthesize truncateMode = truncateMode_; + +- (void)setup { + self.backgroundColor = [UIColor clearColor]; + truncateMode_ = GTMFadeTruncatingTail; +} + +- (id)initWithFrame:(CGRect)frame { + self = [super initWithFrame:frame]; + if (self) { + [self setup]; + } + return self; +} + +- (void)awakeFromNib { + [self setup]; +} + +// Draw fade gradient mask if text is wider than rect. +- (void)drawTextInRect:(CGRect)requestedRect { + CGContextRef context = UIGraphicsGetCurrentContext(); + CGContextSaveGState(context); + + CGSize size = [self.text sizeWithFont:self.font]; + if (size.width > requestedRect.size.width) { + UIImage* image = [self getLinearGradient:requestedRect]; + CGContextClipToMask(context, self.bounds, image.CGImage); + } + + CGContextSetFillColorWithColor(context, self.textColor.CGColor); + [self.text drawInRect:requestedRect + withFont:self.font + lineBreakMode:UILineBreakModeClip + alignment:self.textAlignment]; + + CGContextRestoreGState(context); +} + +// Create gradient opacity mask based on direction. +- (UIImage*)getLinearGradient:(CGRect)rect { + // Create an opaque context. + CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceGray(); + CGContextRef context = CGBitmapContextCreate (NULL, + rect.size.width, + rect.size.height, + 8, + 4*rect.size.width, + colorSpace, + kCGImageAlphaNone); + + // White background will mask opaque, black gradient will mask transparent. + CGContextSetFillColorWithColor(context, [UIColor whiteColor].CGColor); + CGContextFillRect(context, rect); + + // Create gradient from white to black. + CGFloat locs[2] = { 0.0f, 1.0f }; + CGFloat components[4] = { 1.0f, 1.0f, 0.0f, 1.0f }; + CGGradientRef gradient = + CGGradientCreateWithColorComponents(colorSpace, components, locs, 2); + CGColorSpaceRelease(colorSpace); + + // Draw head and/or tail gradient. + CGFloat fadeWidth = MIN(rect.size.height * 2, floor(rect.size.width / 4)); + CGFloat minX = CGRectGetMinX(rect); + CGFloat maxX = CGRectGetMaxX(rect); + if (self.truncateMode & GTMFadeTruncatingTail) { + CGFloat startX = maxX - fadeWidth; + CGPoint startPoint = CGPointMake(startX, CGRectGetMidY(rect)); + CGPoint endPoint = CGPointMake(maxX, CGRectGetMidY(rect)); + CGContextDrawLinearGradient(context, gradient, startPoint, endPoint, 0); + } + if (self.truncateMode & GTMFadeTruncatingHead) { + CGFloat startX = minX + fadeWidth; + CGPoint startPoint = CGPointMake(startX, CGRectGetMidY(rect)); + CGPoint endPoint = CGPointMake(minX, CGRectGetMidY(rect)); + CGContextDrawLinearGradient(context, gradient, startPoint, endPoint, 0); + } + CGGradientRelease(gradient); + + // Clean up, return image. + CGImageRef ref = CGBitmapContextCreateImage(context); + UIImage* image = [UIImage imageWithCGImage:ref]; + CGImageRelease(ref); + CGContextRelease(context); + return image; +} + +@end diff --git a/iPhone/GTMFadeTruncatingLabelTest.m b/iPhone/GTMFadeTruncatingLabelTest.m new file mode 100644 index 0000000..052a32f --- /dev/null +++ b/iPhone/GTMFadeTruncatingLabelTest.m @@ -0,0 +1,67 @@ +// +// GTMFadeTruncatingLabelTest.m +// +// Copyright 2011 Google Inc. +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations under +// the License. +// +#import "GTMNSObject+UnitTesting.h" +#import "GTMSenTestCase.h" +#import "GTMFadeTruncatingLabel.h" + +@interface GTMFadeTruncatingLabelTest : GTMTestCase +@end + + +@implementation GTMFadeTruncatingLabelTest + +- (void)testFadeTruncatingLabelRight { + GTMFadeTruncatingLabel* label = [[[GTMFadeTruncatingLabel alloc] + initWithFrame:CGRectMake(0, 0, 200, 25)] + autorelease]; + label.text = @"A very long string that won't fit"; + GTMAssertObjectImageEqualToImageNamed(label, + @"GTMFadeTruncatingLabelTest1", + @"Mismatched image."); + label.text = @"A short string"; + GTMAssertObjectImageEqualToImageNamed(label, + @"GTMFadeTruncatingLabelTest2", + @"Mismatched image."); + + // Dark background, light text. + label.backgroundColor = [UIColor blackColor]; + [label setTextColor:[UIColor whiteColor]]; + + label.text = @"A very long string that won't fit"; + GTMAssertObjectImageEqualToImageNamed(label, + @"GTMFadeTruncatingLabelTest3", + @"Mismatched image."); + label.text = @"A short string"; + GTMAssertObjectImageEqualToImageNamed(label, + @"GTMFadeTruncatingLabelTest4", + @"Mismatched image."); +} + +- (void)testFadeTruncatingLabelLeftAndRight { + GTMFadeTruncatingLabel* label = [[[GTMFadeTruncatingLabel alloc] + initWithFrame:CGRectMake(0, 0, 200, 25)] + autorelease]; + label.truncateMode = GTMFadeTruncatingHeadAndTail; + + label.text = @"Fade on both left and right"; + GTMAssertObjectImageEqualToImageNamed(label, + @"GTMFadeTruncatingLabelTest5", + @"Mismatched image."); +} + +@end diff --git a/iPhone/TestData/GTMFadeTruncatingLabelTest1.png b/iPhone/TestData/GTMFadeTruncatingLabelTest1.png Binary files differnew file mode 100644 index 0000000..d5d7910 --- /dev/null +++ b/iPhone/TestData/GTMFadeTruncatingLabelTest1.png diff --git a/iPhone/TestData/GTMFadeTruncatingLabelTest2.png b/iPhone/TestData/GTMFadeTruncatingLabelTest2.png Binary files differnew file mode 100644 index 0000000..80d95fd --- /dev/null +++ b/iPhone/TestData/GTMFadeTruncatingLabelTest2.png diff --git a/iPhone/TestData/GTMFadeTruncatingLabelTest3.png b/iPhone/TestData/GTMFadeTruncatingLabelTest3.png Binary files differnew file mode 100644 index 0000000..eba21b2 --- /dev/null +++ b/iPhone/TestData/GTMFadeTruncatingLabelTest3.png diff --git a/iPhone/TestData/GTMFadeTruncatingLabelTest4.png b/iPhone/TestData/GTMFadeTruncatingLabelTest4.png Binary files differnew file mode 100644 index 0000000..e9f59c8 --- /dev/null +++ b/iPhone/TestData/GTMFadeTruncatingLabelTest4.png diff --git a/iPhone/TestData/GTMFadeTruncatingLabelTest5.png b/iPhone/TestData/GTMFadeTruncatingLabelTest5.png Binary files differnew file mode 100644 index 0000000..ba378d2 --- /dev/null +++ b/iPhone/TestData/GTMFadeTruncatingLabelTest5.png |