Merge pull request gpambrozio#10 from romaonthego/master

Added a nice vignette to the background view
barrettj · Feb 28, 2012 · 2b81b33 · 2b81b33
2 parents 43de9fa + 9c7de96
commit 2b81b33
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Showing 6 changed files with 30 additions and 1 deletion.
diff --git a/BlockAlertsDemo/ToAddToYourProjects/BlockActionSheet.h b/BlockAlertsDemo/ToAddToYourProjects/BlockActionSheet.h
@@ -16,6 +16,7 @@
 }
 
 @property (nonatomic, readonly) UIView *view;
+@property (nonatomic, readwrite) BOOL vignetteBackground;
 
 + (id)sheetWithTitle:(NSString *)title;
 

diff --git a/BlockAlertsDemo/ToAddToYourProjects/BlockActionSheet.m b/BlockAlertsDemo/ToAddToYourProjects/BlockActionSheet.m
@@ -10,6 +10,7 @@
 @implementation BlockActionSheet
 
 @synthesize view = _view;
+@synthesize vignetteBackground = _vignetteBackground;
 
 static UIImage *background = nil;
 static UIFont *titleFont = nil;
@@ -65,6 +66,7 @@ - (id)initWithTitle:(NSString *)title
 
             _height += size.height + 5;
         }
+        _vignetteBackground = YES;
     }
 
     return self;
@@ -172,6 +174,7 @@ - (void)showInView:(UIView *)view
     [_view insertSubview:modalBackground atIndex:0];
     [modalBackground release];
 
+    [BlockBackground sharedInstance].vignetteBackground = _vignetteBackground;
     [[BlockBackground sharedInstance] addToMainWindow:_view];
     CGRect frame = _view.frame;
     frame.origin.y = [BlockBackground sharedInstance].bounds.size.height;

diff --git a/BlockAlertsDemo/ToAddToYourProjects/BlockAlertView.h b/BlockAlertsDemo/ToAddToYourProjects/BlockAlertView.h
@@ -25,5 +25,6 @@
 
 @property (nonatomic, retain) UIImage *backgroundImage;
 @property (nonatomic, readonly) UIView *view;
+@property (nonatomic, readwrite) BOOL vignetteBackground;
 
 @end
diff --git a/BlockAlertsDemo/ToAddToYourProjects/BlockAlertView.m b/BlockAlertsDemo/ToAddToYourProjects/BlockAlertView.m
@@ -11,6 +11,7 @@ @implementation BlockAlertView
 
 @synthesize view = _view;
 @synthesize backgroundImage = _backgroundImage;
+@synthesize vignetteBackground = _vignetteBackground;
 
 static UIImage *background = nil;
 static UIFont *titleFont = nil;
@@ -95,6 +96,8 @@ - (id)initWithTitle:(NSString *)title message:(NSString *)message
 
             _height += size.height + kAlertViewBorder;
         }
+
+        _vignetteBackground = YES;
     }
 
     return self;
@@ -261,7 +264,7 @@ - (void)show
         [_backgroundImage release];
         _backgroundImage = nil;
     }
-
+    [BlockBackground sharedInstance].vignetteBackground = _vignetteBackground;
     [[BlockBackground sharedInstance] addToMainWindow:_view];
 
     __block CGPoint center = _view.center;

diff --git a/BlockAlertsDemo/ToAddToYourProjects/BlockBackground.h b/BlockAlertsDemo/ToAddToYourProjects/BlockBackground.h
@@ -20,5 +20,6 @@
 - (void)removeView:(UIView *)view;
 
 @property (nonatomic, retain) UIImage *backgroundImage;
+@property (nonatomic, readwrite) BOOL vignetteBackground;
 
 @end
diff --git a/BlockAlertsDemo/ToAddToYourProjects/BlockBackground.m b/BlockAlertsDemo/ToAddToYourProjects/BlockBackground.m
@@ -11,6 +11,7 @@
 @implementation BlockBackground
 
 @synthesize backgroundImage = _backgroundImage;
+@synthesize vignetteBackground = _vignetteBackground;
 
 static BlockBackground *_sharedInstance = nil;
 
@@ -73,6 +74,7 @@ - (id)init
         self.hidden = YES;
         self.userInteractionEnabled = NO;
         self.backgroundColor = [UIColor colorWithWhite:0.4 alpha:0.5f];
+        self.vignetteBackground = YES;
     }
     return self;
 }
@@ -140,4 +142,22 @@ - (void)removeView:(UIView *)view
     }
 }
 
+- (void)drawRect:(CGRect)rect 
+{    
+    if (_backgroundImage || !_vignetteBackground) return;
+    CGContextRef context = UIGraphicsGetCurrentContext();
+
+	size_t locationsCount = 2;
+	CGFloat locations[2] = {0.0f, 1.0f};
+	CGFloat colors[8] = {0.0f,0.0f,0.0f,0.0f,0.0f,0.0f,0.0f,0.75f}; 
+	CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
+	CGGradientRef gradient = CGGradientCreateWithColorComponents(colorSpace, colors, locations, locationsCount);
+	CGColorSpaceRelease(colorSpace);
+
+	CGPoint center = CGPointMake(self.bounds.size.width/2, self.bounds.size.height/2);
+	float radius = MIN(self.bounds.size.width , self.bounds.size.height) ;
+	CGContextDrawRadialGradient (context, gradient, center, 0, center, radius, kCGGradientDrawsAfterEndLocation);
+	CGGradientRelease(gradient);
+}
+
 @end