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// Copyright 2013 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 "ui/app_list/cocoa/app_list_pager_view.h"
#include "base/mac/foundation_util.h"
#include "skia/ext/skia_utils_mac.h"
#include "ui/app_list/app_list_constants.h"
#include "ui/gfx/scoped_ns_graphics_context_save_gstate_mac.h"
namespace {
const CGFloat kButtonHeight = 6;
const CGFloat kButtonCornerRadius = 2;
const CGFloat kButtonStripPadding = 20;
} // namespace
@interface AppListPagerView ()
@property(assign, nonatomic) NSInteger hoveredSegment;
- (NSInteger)segmentUnderLocation:(NSPoint)locationInWindow;
@end
@interface AppListPagerCell : NSSegmentedCell;
@end
@implementation AppListPagerView
@synthesize hoveredSegment = hoveredSegment_;
+ (Class)cellClass {
return [AppListPagerCell class];
}
- (id)init {
if ((self = [super initWithFrame:NSZeroRect])) {
trackingArea_.reset(
[[CrTrackingArea alloc] initWithRect:NSZeroRect
options:NSTrackingInVisibleRect |
NSTrackingMouseEnteredAndExited |
NSTrackingMouseMoved |
NSTrackingActiveInKeyWindow
owner:self
userInfo:nil]);
[self addTrackingArea:trackingArea_.get()];
hoveredSegment_ = -1;
}
return self;
}
- (NSInteger)findAndHighlightSegmentAtLocation:(NSPoint)locationInWindow {
NSInteger segment = [self segmentUnderLocation:locationInWindow];
[self setHoveredSegment:segment];
return segment;
}
- (void)setHoveredSegment:(NSInteger)segment {
if (segment == hoveredSegment_)
return;
hoveredSegment_ = segment;
[self setNeedsDisplay:YES];
return;
}
- (NSInteger)segmentUnderLocation:(NSPoint)locationInWindow {
if ([self segmentCount] == 0)
return -1;
NSPoint pointInView = [self convertPoint:locationInWindow
fromView:nil];
if (![self mouse:pointInView inRect:[self bounds]])
return -1;
CGFloat segmentWidth = [self bounds].size.width / [self segmentCount];
return pointInView.x / segmentWidth;
}
- (BOOL)isHoveredForSegment:(NSInteger)segment {
return segment == hoveredSegment_;
}
- (void)mouseExited:(NSEvent*)theEvent {
[self setHoveredSegment:-1];
}
- (void)mouseMoved:(NSEvent*)theEvent {
[self findAndHighlightSegmentAtLocation:[theEvent locationInWindow]];
}
- (void)mouseDown:(NSEvent*)theEvent {
// Temporarily clear the highlight to give feedback.
[self setHoveredSegment:-1];
}
// The stock NSSegmentedControl ignores any clicks outside the non-default
// control height, so process all clicks here.
- (void)mouseUp:(NSEvent*)theEvent {
[self findAndHighlightSegmentAtLocation:[theEvent locationInWindow]];
if (hoveredSegment_ < 0)
return;
[self setSelectedSegment:hoveredSegment_];
[[self target] performSelector:[self action]
withObject:self];
}
@end
@implementation AppListPagerCell
- (void)drawWithFrame:(NSRect)cellFrame
inView:(NSView*)controlView {
// Draw nothing if there are less than two segments.
if ([self segmentCount] < 2)
return;
cellFrame.size.width /= [self segmentCount];
for (NSInteger i = 0; i < [self segmentCount]; ++i) {
[self drawSegment:i
inFrame:cellFrame
withView:controlView];
cellFrame.origin.x += cellFrame.size.width;
}
}
- (void)drawSegment:(NSInteger)segment
inFrame:(NSRect)frame
withView:(NSView*)controlView {
gfx::ScopedNSGraphicsContextSaveGState context;
NSRect clipRect = NSMakeRect(
frame.origin.x + kButtonStripPadding / 2,
floor(frame.origin.y + (frame.size.height - kButtonHeight) / 2),
frame.size.width - kButtonStripPadding,
kButtonHeight);
[[NSBezierPath bezierPathWithRoundedRect:clipRect
xRadius:kButtonCornerRadius
yRadius:kButtonCornerRadius] addClip];
AppListPagerView* pagerControl =
base::mac::ObjCCastStrict<AppListPagerView>(controlView);
SkColor backgroundColor = [pagerControl hoveredSegment] == segment ?
app_list::kPagerHoverColor :
app_list::kPagerNormalColor;
[gfx::SkColorToSRGBNSColor(backgroundColor) set];
NSRectFill(frame);
if (![[self target] conformsToProtocol:@protocol(AppListPagerDelegate)])
return;
CGFloat selectedRatio = [[self target] visiblePortionOfPage:segment];
if (selectedRatio == 0.0)
return;
[gfx::SkColorToSRGBNSColor(app_list::kPagerSelectedColor) set];
if (selectedRatio < 0)
frame.origin.x += frame.size.width + frame.size.width * selectedRatio;
frame.size.width *= fabs(selectedRatio);
NSRectFill(frame);
}
@end
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