src/ui/message_center/cocoa/settings_entry_view.mm

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #import "ui/message_center/cocoa/settings_entry_view.h"
   6
   7 #include <algorithm>
   8
   9 #include "base/strings/sys_string_conversions.h"
  10 #include "skia/ext/skia_utils_mac.h"
  11 #include "ui/base/resource/resource_bundle.h"
  12 #import "ui/message_center/cocoa/settings_controller.h"
  13 #include "ui/message_center/message_center_style.h"
  14 #include "ui/resources/grit/ui_resources.h"
  15
  16 using message_center::settings::kEntryIconSize;
  17 using message_center::settings::kInternalHorizontalSpacing;
  18
  19 // Size of the widget rendered for us by Cocoa.
  20 const int kCocoaCheckboxSize = 14;
  21
  22 // Intrinsic padding pixels out of our control.
  23 // Cocoa gives the checkmark some blank space on either side.
  24 const int kIntrinsicCheckmarkLeftPadding = 2;
  25 const int kIntrinsicCheckmarkRightPadding = 4;
  26 // Labels have a bit of whitespace to the left, which can throw
  27 // off measurements.
  28 const int kIntrinsicTextLeftPadding = 1;
  29
  30 // The learn more image is bigger than the actual size of the learn more
  31 // pixels, this represents the difference.
  32 const int kIntrinsicLearnMorePadding = 2;
  33
  34 // Corrected padding values used in layout.
  35 // This computes the amout of padding based on the area reserved for the
  36 // checkbox and the actual checkbox size in pixels.
  37 const int kCheckmarkPaddingNecessary =
  38     (message_center::settings::kCheckboxSizeWithPadding - kCocoaCheckboxSize) /
  39     2;
  40
  41 // These represent the additional padding that we must give the checkmark
  42 // control based on the required padding and the intrinsic padding.
  43 const int kCorrectedCheckmarkLeftPadding =
  44     kCheckmarkPaddingNecessary - kIntrinsicCheckmarkLeftPadding;
  45 const int kCorrectedCheckmarkRightPadding =
  46     kCheckmarkPaddingNecessary + kInternalHorizontalSpacing -
  47     kIntrinsicCheckmarkRightPadding;
  48
  49 // The amount of space we want, based on the spec and the intrinsic text space
  50 // included by Cocoa.
  51 const int kCorrectedIconTextPadding =
  52     kInternalHorizontalSpacing - kIntrinsicTextLeftPadding;
  53
  54 // We want a certain amount of space to the right of the learn more button,
  55 // this metric incorporates the intrinsic learn more blank space to compute it.
  56 const int kCorrectedEntryRightPadding =
  57     kInternalHorizontalSpacing - kIntrinsicLearnMorePadding;
  58
  59 ////////////////////////////////////////////////////////////////////////////////
  60
  61 @interface MCSettingsButton : NSButton
  62 @end
  63
  64 @implementation MCSettingsButton
  65 // drawRect: needs to fill the button with a background, otherwise we don't get
  66 // subpixel antialiasing.
  67 - (void)drawRect:(NSRect)dirtyRect {
  68   NSColor* color = gfx::SkColorToCalibratedNSColor(
  69       message_center::kMessageCenterBackgroundColor);
  70   [color set];
  71   NSRectFill(dirtyRect);
  72   [super drawRect:dirtyRect];
  73 }
  74 @end
  75
  76 @interface MCSettingsButtonCell : NSButtonCell {
  77   // A checkbox's regular image is the checkmark image. This additional image
  78   // is used for the favicon or app icon shown next to the checkmark.
  79   base::scoped_nsobject<NSImage> extraImage_;
  80 }
  81 - (void)setExtraImage:(NSImage*)extraImage;
  82 @end
  83
  84 @implementation MCSettingsButtonCell
  85 - (BOOL)isOpaque {
  86   return YES;
  87 }
  88
  89 - (void)setExtraImage:(NSImage*)extraImage {
  90   extraImage_.reset([extraImage retain]);
  91 }
  92
  93 - (NSRect)drawTitle:(NSAttributedString*)title
  94           withFrame:(NSRect)frame
  95              inView:(NSView*)controlView {
  96   CGFloat inset = kCorrectedCheckmarkRightPadding;
  97   // drawTitle:withFrame:inView: draws the checkmark image. Draw the extra
  98   // image as part of the checkbox's text.
  99   if (extraImage_) {
 100     NSRect imageRect = frame;
 101     imageRect.origin.x += inset;
 102     // Center the image vertically.
 103     if (NSHeight(frame) > kEntryIconSize)
 104       imageRect.origin.y += (NSHeight(frame) - kEntryIconSize) / 2;
 105     imageRect.size = NSMakeSize(kEntryIconSize, kEntryIconSize);
 106     [extraImage_ drawInRect:imageRect
 107                    fromRect:NSZeroRect
 108                   operation:NSCompositeSourceOver
 109                    fraction:1.0
 110              respectFlipped:YES
 111                       hints:nil];
 112
 113     inset += kEntryIconSize + kCorrectedIconTextPadding;
 114   }
 115   frame.origin.x += inset;
 116   frame.size.width -= inset;
 117   return [super drawTitle:title withFrame:frame inView:controlView];
 118 }
 119
 120 - (NSSize)cellSizeForBounds:(NSRect)aRect {
 121   NSSize size = [super cellSizeForBounds:aRect];
 122   size.width += kCorrectedCheckmarkRightPadding;
 123   if (extraImage_) {
 124     size.width += kEntryIconSize + kCorrectedIconTextPadding;
 125     size.height = std::max(static_cast<CGFloat>(kEntryIconSize), size.height);
 126   }
 127   return size;
 128 }
 129
 130 - (NSUInteger)hitTestForEvent:(NSEvent*)event
 131                        inRect:(NSRect)cellFrame
 132                        ofView:(NSView*)controlView {
 133   NSUInteger result =
 134       [super hitTestForEvent:event inRect:cellFrame ofView:controlView];
 135   if (result == NSCellHitNone) {
 136     // The default button cell does hit testing on the attributed string. Since
 137     // this cell draws additional spacing and an icon in front of the string,
 138     // tweak the hit testing result.
 139     NSPoint point =
 140         [controlView convertPoint:[event locationInWindow] fromView:nil];
 141
 142     NSRect rect = [self titleRectForBounds:[controlView bounds]];
 143     rect.size = [[self attributedTitle] size];
 144     rect.size.width += kCorrectedCheckmarkRightPadding;
 145
 146     if (extraImage_)
 147       rect.size.width += kEntryIconSize + kCorrectedIconTextPadding;
 148
 149     if (NSPointInRect(point, rect))
 150       result = NSCellHitContentArea | NSCellHitTrackableArea;
 151   }
 152   return result;
 153 }
 154 @end
 155
 156 @implementation MCSettingsEntryView
 157 - (id)initWithController:(MCSettingsController*)controller
 158                 notifier:(message_center::Notifier*)notifier
 159                    frame:(NSRect)frame
 160             hasSeparator:(BOOL)hasSeparator {
 161   if ((self = [super initWithFrame:frame])) {
 162     [self setBoxType:NSBoxCustom];
 163     [self setBorderType:NSNoBorder];
 164     [self setTitlePosition:NSNoTitle];
 165     [self setContentViewMargins:NSZeroSize];
 166
 167     hasSeparator_ = hasSeparator;
 168     controller_ = controller;
 169     notifier_ = notifier;
 170     if (!notifier->icon.IsEmpty())
 171       notifierIcon_.reset(notifier->icon.CopyNSImage());
 172     [self layout];
 173   }
 174   return self;
 175 }
 176
 177 - (void)setNotifierIcon:(NSImage*)notifierIcon {
 178   notifierIcon_.reset([notifierIcon retain]);
 179   [self layout];
 180 }
 181
 182 - (NSButton*)checkbox {
 183   return checkbox_;
 184 }
 185
 186 - (void)layout {
 187   BOOL hasLearnMore =
 188       [controller_ notifierHasAdvancedSettings:notifier_->notifier_id];
 189
 190   // Now calculate the space available for the checkbox button.
 191   NSRect checkboxFrame = [self bounds];
 192   checkboxFrame.origin.x += kCorrectedCheckmarkLeftPadding;
 193   checkboxFrame.size.width -=
 194       kCorrectedCheckmarkLeftPadding + kCorrectedEntryRightPadding;
 195
 196   NSRect learnMoreFrame =
 197       NSMakeRect(checkboxFrame.origin.x + checkboxFrame.size.width,
 198                  checkboxFrame.origin.y,
 199                  0,
 200                  checkboxFrame.size.height);
 201
 202   // Initially place the learn more button right-aligned.
 203   if (hasLearnMore) {
 204     ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
 205     NSImage* defaultImage =
 206         rb.GetNativeImageNamed(IDR_NOTIFICATION_ADVANCED_SETTINGS).ToNSImage();
 207     NSSize defaultImageSize = [defaultImage size];
 208     learnMoreFrame.size.width = defaultImageSize.width;
 209     learnMoreFrame.origin.x -= defaultImageSize.width;
 210
 211     // May need to center the image if it's shorter than the entry.
 212     if (defaultImageSize.height < learnMoreFrame.size.height) {
 213       learnMoreFrame.origin.y +=
 214           (learnMoreFrame.size.height - defaultImageSize.height) / 2;
 215       learnMoreFrame.size.height = defaultImageSize.height;
 216     }
 217
 218     // Since we have an image then we need to ensure that the text from the
 219     // checkbox doesn't overlap with the learn more image.
 220     checkboxFrame.size.width -=
 221         kCorrectedIconTextPadding + learnMoreFrame.size.width;
 222
 223     if (!learnMoreButton_.get()) {
 224       learnMoreButton_.reset(
 225           [[HoverImageButton alloc] initWithFrame:learnMoreFrame]);
 226       [self addSubview:learnMoreButton_];
 227     } else {
 228       [learnMoreButton_ setFrame:learnMoreFrame];
 229     }
 230     [learnMoreButton_ setDefaultImage:defaultImage];
 231     [learnMoreButton_ setHoverImage:rb.GetNativeImageNamed(
 232         IDR_NOTIFICATION_ADVANCED_SETTINGS_HOVER).ToNSImage()];
 233     [learnMoreButton_ setPressedImage:rb.GetNativeImageNamed(
 234         IDR_NOTIFICATION_ADVANCED_SETTINGS_PRESSED).ToNSImage()];
 235     [learnMoreButton_ setBordered:NO];
 236     [learnMoreButton_ setTarget:self];
 237     [learnMoreButton_ setAction:@selector(learnMoreClicked:)];
 238   }
 239
 240   if (!checkbox_.get()) {
 241     checkbox_.reset([[MCSettingsButton alloc] initWithFrame:checkboxFrame]);
 242     [self addSubview:checkbox_];
 243   } else {
 244     [checkbox_ setFrame:checkboxFrame];
 245   }
 246
 247   base::scoped_nsobject<MCSettingsButtonCell> cell([[MCSettingsButtonCell alloc]
 248       initTextCell:base::SysUTF16ToNSString(notifier_->name)]);
 249   if ([notifierIcon_ isValid])
 250     [cell setExtraImage:notifierIcon_];
 251
 252   [checkbox_ setCell:cell];
 253   [checkbox_ setButtonType:NSSwitchButton];
 254   [checkbox_ setState:notifier_->enabled ? NSOnState : NSOffState];
 255   [checkbox_ setTarget:self];
 256   [checkbox_ setAction:@selector(checkboxClicked:)];
 257
 258   if (hasSeparator_) {
 259     NSRect separatorRect = [self bounds];
 260     separatorRect.size.height = 1;
 261     if (!separator_.get()) {
 262       separator_.reset([[NSBox alloc] initWithFrame:separatorRect]);
 263       [separator_ setBoxType:NSBoxCustom];
 264       [separator_ setBorderType:NSLineBorder];
 265       [separator_ setBorderColor:gfx::SkColorToCalibratedNSColor(
 266           message_center::settings::kEntrySeparatorColor)];
 267       [separator_ setTitlePosition:NSNoTitle];
 268       [separator_ setContentViewMargins:NSZeroSize];
 269       [self addSubview:separator_];
 270     } else {
 271       [separator_ setFrame:separatorRect];
 272     }
 273   }
 274 }
 275
 276 - (void)checkboxClicked:(id)sender {
 277   BOOL enabled = [sender state] == NSOnState;
 278   [controller_ setSettingsNotifier:notifier_ enabled:enabled];
 279 }
 280
 281 - (void)learnMoreClicked:(id)sender {
 282   [controller_ learnMoreClicked:notifier_];
 283 }
 284
 285 // Testing API /////////////////////////////////////////////////////////////////
 286
 287 - (void)clickLearnMore {
 288   [learnMoreButton_ performClick:nil];
 289 }
 290
 291 @end
 292
 293 ///////////////////////////////////////////////////////////////////////////////