Provide font customization options

[orschaef]

It would be nice to customize the fonts of the title and message "labels" (I saw you render the text in drawRect).
I discovered the static constants in the implementation file (kTWMessageViewTitleFont and kTWMessageViewDescriptionFont - didn't dive into details).

Wouldn't that be a nice and a low hanging fruit enhancement?

Greetings.

[terryworona]

It would be easy to add a new protocol function to the TWMessageBarStyleSheet:

 - (UIFont *)fontForMessageType:(TWMessageBarMessageType)type;

Don't have time to tackle this myself. Why don't you take a swing at it?

[albertmartga]

fyi here's a patch for this I just did:

commit 7ede0a4d85b0f72d05479d39192ce8474ff0b40b
Author: Albert <albert@bloomfits.com>
Date:   Wed Jun 4 11:36:16 2014 +0200

    inapp push notification design

diff --git a/TWMessageBarManager/Classes/TWMessageBarManager.h b/TWMessageBarManager/Classes/TWMessageBarManager.h
index 77a7e4f..4f22265 100644
--- a/TWMessageBarManager/Classes/TWMessageBarManager.h
+++ b/TWMessageBarManager/Classes/TWMessageBarManager.h
@@ -45,6 +45,12 @@ typedef enum {
  */
 - (UIImage *)iconImageForMessageType:(TWMessageBarMessageType)type;

+- (UIFont *)fontTitleForMessageType:(TWMessageBarMessageType)type;
+- (UIFont *)fontDescriptionForMessageType:(TWMessageBarMessageType)type;
+- (UIColor *)fontTitleColorForMessageType:(TWMessageBarMessageType)type;
+- (UIColor *)fontDescriptionColorForMessageType:(TWMessageBarMessageType)type;
+
+
 @end

 @interface TWMessageBarManager : NSObject
diff --git a/TWMessageBarManager/Classes/TWMessageBarManager.m b/TWMessageBarManager/Classes/TWMessageBarManager.m
index 454164e..4f6b24b 100644
--- a/TWMessageBarManager/Classes/TWMessageBarManager.m
+++ b/TWMessageBarManager/Classes/TWMessageBarManager.m
@@ -5,6 +5,7 @@
 //  Copyright (c) 2013 Terry Worona. All rights reserved.
 //

+
 #import "TWMessageBarManager.h"

 // Quartz
@@ -552,29 +553,29 @@ static UIColor *kTWDefaultMessageBarStyleSheetInfoStrokeColor = nil;
             NSMutableParagraphStyle *paragraphStyle = [[NSParagraphStyle defaultParagraphStyle] mutableCopy];
             paragraphStyle.alignment = NSTextAlignmentLeft;

-            [kTWMessageViewTitleColor set];
+            [[styleSheet fontTitleColorForMessageType:self.messageType] set];
             [self.titleString drawWithRect:CGRectMake(xOffset, yOffset, titleLabelSize.width, titleLabelSize.height)
                                    options:NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingTruncatesLastVisibleLine
-                                attributes:@{NSFontAttributeName:kTWMessageViewTitleFont, NSForegroundColorAttributeName:kTWMessageViewTitleColor, NSParagraphStyleAttributeName:paragraphStyle}
+                                attributes:@{NSFontAttributeName:[styleSheet fontTitleForMessageType:self.messageType], NSForegroundColorAttributeName:[styleSheet fontTitleColorForMessageType:self.messageType], NSParagraphStyleAttributeName:paragraphStyle}
                                    context:nil];

             yOffset += titleLabelSize.height;

-            [kTWMessageViewDescriptionColor set];
+            [[styleSheet fontDescriptionColorForMessageType:self.messageType] set];
             [self.descriptionString drawWithRect:CGRectMake(xOffset, yOffset, descriptionLabelSize.width, descriptionLabelSize.height)
                                          options:NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingTruncatesLastVisibleLine
-                                      attributes:@{NSFontAttributeName:kTWMessageViewDescriptionFont, NSForegroundColorAttributeName:kTWMessageViewDescriptionColor, NSParagraphStyleAttributeName:paragraphStyle}
+                                      attributes:@{NSFontAttributeName:[styleSheet fontDescriptionForMessageType:self.messageType], NSForegroundColorAttributeName:[styleSheet fontDescriptionColorForMessageType:self.messageType], NSParagraphStyleAttributeName:paragraphStyle}
                                          context:nil];
         }
         else
         {
-            [kTWMessageViewTitleColor set];
-            [self.titleString drawInRect:CGRectMake(xOffset, yOffset, titleLabelSize.width, titleLabelSize.height) withFont:kTWMessageViewTitleFont lineBreakMode:NSLineBreakByTruncatingTail alignment:NSTextAlignmentLeft];
+            [[styleSheet fontTitleColorForMessageType:self.messageType] set];
+            [self.titleString drawInRect:CGRectMake(xOffset, yOffset, titleLabelSize.width, titleLabelSize.height) withFont:[styleSheet fontTitleForMessageType:self.messageType] lineBreakMode:NSLineBreakByTruncatingTail alignment:NSTextAlignmentLeft];

             yOffset += titleLabelSize.height;

-            [kTWMessageViewDescriptionColor set];
-            [self.descriptionString drawInRect:CGRectMake(xOffset, yOffset, descriptionLabelSize.width, descriptionLabelSize.height) withFont:kTWMessageViewDescriptionFont lineBreakMode:NSLineBreakByTruncatingTail alignment:NSTextAlignmentLeft];
+            [[styleSheet fontDescriptionColorForMessageType:self.messageType] set];
+            [self.descriptionString drawInRect:CGRectMake(xOffset, yOffset, descriptionLabelSize.width, descriptionLabelSize.height) withFont:[styleSheet fontDescriptionForMessageType:self.messageType] lineBreakMode:NSLineBreakByTruncatingTail alignment:NSTextAlignmentLeft];
         }
     }
 }
@@ -605,12 +606,22 @@ static UIColor *kTWDefaultMessageBarStyleSheetInfoStrokeColor = nil;

 - (CGSize)titleSize
 {
+
+    UIFont *titleFont;
+    if ([self.delegate respondsToSelector:@selector(styleSheetForMessageView:)])
+    {
+        id<TWMessageBarStyleSheet> styleSheet = [self.delegate styleSheetForMessageView:self];
+        titleFont=[styleSheet fontTitleForMessageType:self.messageType];
+    } else {
+        titleFont=kTWMessageViewTitleFont;
+    }
+        
     CGSize boundedSize = CGSizeMake([self availableWidth], CGFLOAT_MAX);
     CGSize titleLabelSize;

     if ([[UIDevice currentDevice] isRunningiOS7OrLater])
     {
-        NSDictionary *titleStringAttributes = [NSDictionary dictionaryWithObject:kTWMessageViewTitleFont forKey: NSFontAttributeName];
+        NSDictionary *titleStringAttributes = [NSDictionary dictionaryWithObject:titleFont forKey: NSFontAttributeName];
         titleLabelSize = [self.titleString boundingRectWithSize:boundedSize
                                                         options:NSStringDrawingTruncatesLastVisibleLine | NSStringDrawingUsesLineFragmentOrigin
                                                      attributes:titleStringAttributes
@@ -618,7 +629,7 @@ static UIColor *kTWDefaultMessageBarStyleSheetInfoStrokeColor = nil;
     }
     else
     {
-        titleLabelSize = [_titleString sizeWithFont:kTWMessageViewTitleFont constrainedToSize:boundedSize lineBreakMode:NSLineBreakByTruncatingTail];
+        titleLabelSize = [_titleString sizeWithFont:titleFont constrainedToSize:boundedSize lineBreakMode:NSLineBreakByTruncatingTail];
     }

     return CGSizeMake(ceilf(titleLabelSize.width), ceilf(titleLabelSize.height));
@@ -626,12 +637,22 @@ static UIColor *kTWDefaultMessageBarStyleSheetInfoStrokeColor = nil;

 - (CGSize)descriptionSize
 {
+    UIFont *descriptionFont;
+    if ([self.delegate respondsToSelector:@selector(styleSheetForMessageView:)])
+    {
+        id<TWMessageBarStyleSheet> styleSheet = [self.delegate styleSheetForMessageView:self];
+        descriptionFont=[styleSheet fontDescriptionForMessageType:self.messageType];
+    } else {
+        descriptionFont=kTWMessageViewDescriptionFont;
+    }
+    
+    
     CGSize boundedSize = CGSizeMake([self availableWidth], CGFLOAT_MAX);
     CGSize descriptionLabelSize;

     if ([[UIDevice currentDevice] isRunningiOS7OrLater])
     {
-        NSDictionary *descriptionStringAttributes = [NSDictionary dictionaryWithObject:kTWMessageViewDescriptionFont forKey: NSFontAttributeName];
+        NSDictionary *descriptionStringAttributes = [NSDictionary dictionaryWithObject:descriptionFont forKey: NSFontAttributeName];
         descriptionLabelSize = [self.descriptionString boundingRectWithSize:boundedSize
                                                                     options:NSStringDrawingTruncatesLastVisibleLine | NSStringDrawingUsesLineFragmentOrigin
                                                                  attributes:descriptionStringAttributes
@@ -639,7 +660,7 @@ static UIColor *kTWDefaultMessageBarStyleSheetInfoStrokeColor = nil;
     }
     else
     {
-        descriptionLabelSize = [_descriptionString sizeWithFont:kTWMessageViewDescriptionFont constrainedToSize:boundedSize lineBreakMode:NSLineBreakByTruncatingTail];
+        descriptionLabelSize = [_descriptionString sizeWithFont:descriptionFont constrainedToSize:boundedSize lineBreakMode:NSLineBreakByTruncatingTail];
     }

     return CGSizeMake(ceilf(descriptionLabelSize.width), ceilf(descriptionLabelSize.height));
@@ -760,6 +781,21 @@ static UIColor *kTWDefaultMessageBarStyleSheetInfoStrokeColor = nil;
     return iconImage;
 }

+
+- (UIFont *)fontTitleForMessageType:(TWMessageBarMessageType)type{
+    return kTWMessageViewTitleFont;
+}
+- (UIFont *)fontDescriptionForMessageType:(TWMessageBarMessageType)type{
+    return kTWMessageViewDescriptionFont;
+    
+}
+- (UIColor *)fontTitleColorForMessageType:(TWMessageBarMessageType)type{
+    return kTWMessageViewTitleColor;
+}
+- (UIColor *)fontDescriptionColorForMessageType:(TWMessageBarMessageType)type{
+    return kTWMessageViewDescriptionColor;
+}
+
 @end

 @implementation TWMessageWindow

[terryworona]

This was pulled in via #52