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| 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/app_list/cocoa/item_drag_controller.h" | |
| 6 | |
| 7 #include "base/logging.h" | |
| 8 #import "ui/app_list/cocoa/apps_grid_view_item.h" | |
| 9 #include "ui/base/cocoa/window_size_constants.h" | |
| 10 | |
| 11 // Scale to transform the grid cell when a drag starts. Note that 1.5 ensures | |
| 12 // that integers are used for the layer bounds when the grid cell dimensions | |
| 13 // are even. | |
| 14 const CGFloat kDraggingIconScale = 1.5; | |
| 15 | |
| 16 const NSTimeInterval kAnimationDuration = 0.2; | |
| 17 | |
| 18 | |
| 19 @interface ItemDragController () | |
| 20 | |
| 21 - (void)animateTransformFrom:(CATransform3D)fromValue | |
| 22 useDelegate:(BOOL)useDelegate; | |
| 23 | |
| 24 - (void)clearAnimations; | |
| 25 | |
| 26 @end | |
| 27 | |
| 28 @implementation ItemDragController | |
| 29 | |
| 30 - (id)initWithGridCellSize:(NSSize)size { | |
| 31 if ((self = [super init])) { | |
| 32 NSRect frameRect = NSMakeRect(0, | |
| 33 0, | |
| 34 size.width * kDraggingIconScale, | |
| 35 size.height * kDraggingIconScale); | |
| 36 base::scoped_nsobject<NSView> dragView( | |
| 37 [[NSView alloc] initWithFrame:frameRect]); | |
| 38 [dragView setWantsLayer:YES]; | |
| 39 [dragView setHidden:YES]; | |
| 40 | |
| 41 dragLayer_.reset([[CALayer layer] retain]); | |
| 42 [dragLayer_ setFrame:NSRectToCGRect(frameRect)]; | |
| 43 [[dragView layer] addSublayer:dragLayer_]; | |
| 44 | |
| 45 [self setView:dragView]; | |
| 46 } | |
| 47 return self; | |
| 48 } | |
| 49 | |
| 50 - (void)initiate:(AppsGridViewItem*)item | |
| 51 mouseDownLocation:(NSPoint)mouseDownLocation | |
| 52 currentLocation:(NSPoint)currentLocation | |
| 53 timestamp:(NSTimeInterval)eventTimestamp { | |
| 54 [self clearAnimations]; | |
| 55 NSView* itemView = [item view]; | |
| 56 NSPoint pointInGridCell = [itemView convertPoint:mouseDownLocation | |
| 57 fromView:nil]; | |
| 58 mouseOffset_ = NSMakePoint(pointInGridCell.x - NSMidX([itemView bounds]), | |
| 59 NSMidY([itemView bounds]) - pointInGridCell.y); | |
| 60 | |
| 61 NSBitmapImageRep* imageRep = [item dragRepresentationForRestore:NO]; | |
| 62 [dragLayer_ setContents:reinterpret_cast<id>([imageRep CGImage])]; | |
| 63 [dragLayer_ setTransform:CATransform3DIdentity]; | |
| 64 | |
| 65 // Add a grow animation to the layer. | |
| 66 CATransform3D growFrom = CATransform3DScale(CATransform3DIdentity, | |
| 67 1.0 / kDraggingIconScale, | |
| 68 1.0 / kDraggingIconScale, | |
| 69 1.0); | |
| 70 [self animateTransformFrom:growFrom | |
| 71 useDelegate:NO]; | |
| 72 | |
| 73 growStart_ = eventTimestamp; | |
| 74 [[self view] setHidden:NO]; | |
| 75 } | |
| 76 | |
| 77 - (void)update:(NSPoint)currentLocation | |
| 78 timestamp:(NSTimeInterval)eventTimestamp { | |
| 79 NSPoint pointInSuperview = [[[self view] superview] | |
| 80 convertPoint:currentLocation | |
| 81 fromView:nil]; | |
| 82 NSRect rect = [[self view] bounds]; | |
| 83 NSPoint anchor = NSMakePoint(NSMidX(rect), NSMidY(rect)); | |
| 84 | |
| 85 // If the grow animation is still in progress, make the point of the image | |
| 86 // that was clicked appear stuck to the mouse cursor. | |
| 87 CGFloat progress = (eventTimestamp - growStart_) / kAnimationDuration; | |
| 88 CGFloat currentIconScale = progress < 1.0 ? | |
| 89 1.0 + (kDraggingIconScale - 1.0) * progress : | |
| 90 kDraggingIconScale; | |
| 91 | |
| 92 pointInSuperview.x -= (mouseOffset_.x * currentIconScale + anchor.x); | |
| 93 pointInSuperview.y -= (mouseOffset_.y * currentIconScale + anchor.y); | |
| 94 [[self view] setFrameOrigin:pointInSuperview]; | |
| 95 } | |
| 96 | |
| 97 - (void)complete:(AppsGridViewItem*)item | |
| 98 targetOrigin:(NSPoint)targetOrigin { | |
| 99 [self clearAnimations]; | |
| 100 | |
| 101 NSView* itemView = [item view]; | |
| 102 NSBitmapImageRep* imageRep = [item dragRepresentationForRestore:YES]; | |
| 103 | |
| 104 [dragLayer_ setContents:reinterpret_cast<id>([imageRep CGImage])]; | |
| 105 [dragLayer_ setTransform:CATransform3DScale(CATransform3DIdentity, | |
| 106 1.0 / kDraggingIconScale, | |
| 107 1.0 / kDraggingIconScale, | |
| 108 1.0)]; | |
| 109 | |
| 110 // Retain the button so it can be unhidden when the animation completes. Note | |
| 111 // that the |item| and corresponding button can differ from the |item| passed | |
| 112 // to initiate(), if it moved to a new page during the drag. At this point the | |
| 113 // destination page is known, so retain the button. | |
| 114 buttonToRestore_.reset([[item button] retain]); | |
| 115 | |
| 116 // Add the shrink animation for the layer. | |
| 117 [self animateTransformFrom:CATransform3DIdentity | |
| 118 useDelegate:YES]; | |
| 119 shrinking_ = YES; | |
| 120 | |
| 121 // Also animate the translation, on the view. | |
| 122 // TODO(tapted): This should be merged into the scale transform, instead of | |
| 123 // using a separate NSViewAnimation. | |
| 124 NSRect startRect = [[self view] frame]; | |
| 125 | |
| 126 // The final position needs to be adjusted since it shrinks from each side. | |
| 127 NSRect targetRect = NSMakeRect( | |
| 128 targetOrigin.x - NSMidX([itemView bounds]) * (kDraggingIconScale - 1), | |
| 129 targetOrigin.y - NSMidY([itemView bounds]) * (kDraggingIconScale - 1), | |
| 130 startRect.size.width, | |
| 131 startRect.size.height); | |
| 132 | |
| 133 NSDictionary* animationDict = @{ | |
| 134 NSViewAnimationTargetKey: [self view], | |
| 135 NSViewAnimationStartFrameKey: [NSValue valueWithRect:startRect], | |
| 136 NSViewAnimationEndFrameKey: [NSValue valueWithRect:targetRect] | |
| 137 }; | |
| 138 | |
| 139 base::scoped_nsobject<NSViewAnimation> translate([[NSViewAnimation alloc] | |
| 140 initWithViewAnimations:[NSArray arrayWithObject:animationDict]]); | |
| 141 [translate setDuration:kAnimationDuration]; | |
| 142 [translate startAnimation]; | |
| 143 } | |
| 144 | |
| 145 - (void)animateTransformFrom:(CATransform3D)fromValue | |
| 146 useDelegate:(BOOL)useDelegate { | |
| 147 CABasicAnimation* animation = | |
| 148 [CABasicAnimation animationWithKeyPath:@"transform"]; | |
| 149 [animation setFromValue:[NSValue valueWithCATransform3D:fromValue]]; | |
| 150 if (useDelegate) | |
| 151 [animation setDelegate:self]; | |
| 152 | |
| 153 [animation setDuration:kAnimationDuration]; | |
| 154 [CATransaction begin]; | |
| 155 [CATransaction setValue:[NSNumber numberWithFloat:kAnimationDuration] | |
| 156 forKey:kCATransactionAnimationDuration]; | |
| 157 [dragLayer_ addAnimation:animation | |
| 158 forKey:@"transform"]; | |
| 159 [CATransaction commit]; | |
| 160 } | |
| 161 | |
| 162 - (void)clearAnimations { | |
| 163 [dragLayer_ removeAllAnimations]; | |
| 164 if (!shrinking_) | |
| 165 return; | |
| 166 | |
| 167 DCHECK(buttonToRestore_); | |
| 168 [buttonToRestore_ setHidden:NO]; | |
| 169 buttonToRestore_.reset(); | |
| 170 shrinking_ = NO; | |
| 171 } | |
| 172 | |
| 173 - (void)animationDidStop:(CAAnimation*)anim | |
| 174 finished:(BOOL)finished { | |
| 175 if (!finished) | |
| 176 return; | |
| 177 | |
| 178 DCHECK(shrinking_); | |
| 179 [self clearAnimations]; | |
| 180 [dragLayer_ setContents:nil]; | |
| 181 [[self view] setHidden:YES]; | |
| 182 } | |
| 183 | |
| 184 @end | |
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Chromium Code Reviews
Issue 187483005:
Extending the Views-on-Mac experiment: whole app list grid.
Base URL: svn://svn.chromium.org/chrome/trunk/src