CollectionViewForTiger
This is a NSCollectionView like class that works on Tiger. It derives directly from NSView. I tried to customize NSTableView but there were too many bugs with drag/drop and scrollbars for it too work. If you don't need those features then you might want to start there first (see http://www.joar.com/code ). --SaileshAgrawal
This is written specifically with the requirements I had in mind. It has the following features and limitations hard coded into it:
- Like NSCollectionView allows you to create you row's view in Interface Builder and add it to the collection view.
- One column only
- Always has at least one selected item.
- Allows multiple selection.
- Allows reordering of items using drag/drop.
- Allows files to be dragged into it.
- Allows rows to be dragged out of it as shortcuts to files.
- Automatically changes text field colors to white when a row is selected.
- Your row view must derive from TigerCollectionViewItem to be added to the collection view.
- Allows menus on right click
Remember that this is mostly sample code. Feel free to use it any way you like but there will likely be some bugs in it.
Interface
- import <Cocoa/Cocoa.h>
@class TigerCollectionViewItem;
@protocol TigerCollectionViewTarget <NSObject>
- (NSDragOperation)dragOperationForFiles: (NSArray )filePaths; - (void)dragFiles: (NSArray )filePaths toIndex: (int)index; - (void)dragItemsAtIndexes: (NSArray )indexes toIndex: (int)index; - (BOOL)shouldRemoveItemsAtIndexes: (NSArray )indexes; - (void)performDoubleClickActionForIndex: (int)index; - (void)onSelectionDidChange; - (NSString )filePathForIndex: (int)index;
@end
@interface TigerCollectionView : NSView
{
IBOutlet id<TigerCollectionViewTarget> target; NSMutableArray items; BOOL needsLayout;
}
- (void)addItem: (TigerCollectionViewItem )item
atIndex: (int)index;
- (void)removeItemAtIndex: (int)index;
- (void)removeAllItems;
- (int)numberOfItems;
- (NSArray )selectedIndexes;
@end
@interface TigerCollectionViewItem : NSView
{
BOOL isSelected; NSPoint mouseDownPos; int dragTargetType; NSMutableDictionary cachedTextColors;
} @end
Implementation
- import "TigerCollectionView.h"
static const float DRAG_START_DISTANCE = 10;
static const float DRAG_IMAGE_ALPHA = 0.5;
static NSString const DRAG_ITEM_TYPE = @"TigerCollectionViewDragType";
typedef enum {
DragTargetType_None, DragTargetType_Top, DragTargetType_Bottom,
@interface TigerCollectionView (Private)
// Override NSView - (void)moveDown: (id)sender; - (void)moveUp: (id)sender; - (BOOL)isFlipped; - (void)selectAll: (id)sender; - (void)keyDown: (NSEvent )event; - (void)deleteBackward: (id)sender; - (void)deleteForward: (id)sender; - (NSDragOperation)draggingEntered: (id<NSDraggingInfo>)sender; - (void)draggingExited: (id<NSDraggingInfo>)sender; - (BOOL)prepareForDragOperation: (id<NSDraggingInfo>)sender; - (BOOL)performDragOperation: (id<NSDraggingInfo>)sender; - (NSDragOperation)draggingUpdated: (id<NSDraggingInfo>)sender; - (BOOL)wantsPeriodicDraggingUpdates; - (NSDragOperation)draggingSourceOperationMaskForLocal: (BOOL)isLocal; - (void)resizeWithOldSuperviewSize: (NSSize)oldBoundsSize;
// Internal methods - (void)setNeedsLayout: (BOOL)flag; - (void)performLayout; - (void)startDrag: (NSEvent )event
withItem: (TigerCollectionViewItem )item;
- (NSImage )dragImageForIndexes: (NSArray )indexes
dragPoint: (NSPoint )dragPoint;
- (void)itemClicked: (TigerCollectionViewItem )item
event: (NSEvent )event;
- (void)setAllItemsSelected: (BOOL)selected; - (void)growSelectionToItem: (TigerCollectionViewItem )item; - (void)moveSelection: (BOOL)moveUp
byExtending: (BOOL)byExtending;
- (void)scrollToItem: (TigerCollectionViewItem )item; - (void)maintainNonEmptySelection: (int)index; - (void)removeItemsAtIndexes: (NSArray )indexes; - (int)indexFromDragTarget: (NSView )targetView
draggingInfo: (id<NSDraggingInfo>)draggingInfo;
- (void)setDragTarget: (NSView )targetView
draggingInfo: (id<NSDraggingInfo>)draggingInfo;
- (void)setIndex: (int)index
isDragTarget: (BOOL)isDragTarget;
- (id<TigerCollectionViewTarget>)target; - (int)dragTargetIndex; - (void)maximizeViewWidth: (id)sender; - (void)onKeyWindowChanged: (NSNotification )notification; - (void)testSelectionChanged: (NSArray )oldSelection; - (NSArray )filePathsForIndexes: (NSArray )indexes;
@end
@interface TigerCollectionViewItem (Private)
// Override NSView - (NSMenu )menuForEvent:(NSEvent )event; - (NSView )hitTest: (NSPoint)point; - (void)mouseDown: (NSEvent )event; - (void)mouseUp: (NSEvent )event; - (void)mouseDragged: (NSEvent )event; - (BOOL)acceptsFirstResponder;
// Internal methods - (void)setIsSelected: (BOOL)flag; - (BOOL)isSelected; - (TigerCollectionView )collectionView; - (BOOL)isLeftClickEvent: (NSEvent )event; - (void)setDragTargetType: (DragTargetType)type; - (DragTargetType)dragTargetType; - (void)updateHighlightState; - (void)setHighlight: (BOOL)isHighlighted
forTextField: (NSTextField )textField;
- (BOOL)shouldDrawSecondaryHighlight;
@end
static float
PointDistance(NSPoint start,
NSPoint end)
{
float deltaX = end.x - start.x; float deltaY = end.y - start.y; return sqrt(deltaX deltaX + deltaY deltaY);
}
@implementation TigerCollectionView
- (id)initWithFrame: (NSRect)frame
{
if ((self = [super initWithFrame:frame])) {
items = [[NSMutableArray alloc] init];
}
return self;
}
- (void)dealloc
{
[[NSNotificationCenter defaultCenter] removeObserver:self]; [items release]; items = nil; [super dealloc];
}
- (void)awakeFromNib
{
ASSERT([[self target] conformsToProtocol:
@protocol(TigerCollectionViewTarget)]);
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(onKeyWindowChanged:) name:NSWindowDidBecomeKeyNotification object:[self window]]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(onKeyWindowChanged:) name:NSWindowDidResignKeyNotification object:[self window]];
[[[self enclosingScrollView] contentView] setCopiesOnScroll:NO];
[self registerForDraggedTypes:
[[[NSArray]] arrayWithObjects:NSFilenamesPboardType, DRAG_ITEM_TYPE, nil]];
[self maximizeViewWidth:nil];
}
- (void)drawRect: (NSRect)rect
{
/
XXX: This is a hack to work around autohide scrollbars not working
correctly. When removing an item causes the vertical scrollbar to
be hidden our items don't automatically resize to fit the new width.
Until that bug is fixed this hack disables the "needsLayout" optimization
and forces a layout on every dray. The layout code is pretty fast so this
isn't very expensive.
/
needsLayout = YES;
if (needsLayout) {
[self performLayout];
[self maintainNonEmptySelection:0];
}
[super drawRect:rect];
[[NSColor colorWithCalibratedRed:214.0/255.0 green:221.0/255.0 blue:229.0/255.0 alpha:1.0] set]; NSRectFill([self bounds]);
}
- (void)addItem: (TigerCollectionViewItem )item
atIndex: (int)index
{
ASSERT(item); [items insertObject:item atIndex:index]; [item setAutoresizingMask:NSViewWidthSizable | NSViewMinYMargin]; [self addSubview:item]; [self setNeedsLayout:YES];
}
- (void)removeItemAtIndex: (int)index
{
[self removeItemsAtIndexes:
[[[NSArray]] arrayWithObject:[[[NSNumber]] numberWithInt:index]]];
[self maintainNonEmptySelection:index];
}
- (void)removeAllItems {
[items removeAllObjects]; [self setNeedsLayout:YES]; [self setNeedsDisplay:YES];
}
- (int)numberOfItems
{
return [items count];
}
- (NSArray )selectedIndexes
{
NSMutableArray selectedIndexes = [[[NSMutableArray]] array]; int count = [items count]; int i; for (i = 0; i < count; i++) { TigerCollectionViewItem item = [items objectAtIndex:i]; if ([item isSelected]) { [selectedIndexes addObject:[[[NSNumber]] numberWithInt:i]]; } } return selectedIndexes;
}
@end // TigerCollectionView
@implementation TigerCollectionView (Private)
- (void)setNeedsLayout: (BOOL)flag
{
needsLayout = flag;
}
- (void)performLayout
{
// Calculate the total height. float myHeight = 0; NSEnumerator e = [items objectEnumerator]; TigerCollectionViewItem item; while ((item = [e nextObject])) { myHeight += [item frame].size.height; }
// Resize the collection view to fit. NSRect myFrame = [self frame]; [self setFrameSize:NSMakeSize(myFrame.size.width, myHeight)]; if (myFrame.size.height != myHeight) { [self setNeedsDisplay:YES]; }
// Layout all the items.
float yPos = 0;
e = [items objectEnumerator];
while ((item = [e nextObject])) {
NSRect oldItemFrame = [item frame];
NSRect newItemFrame;
newItemFrame.origin.y = yPos;
newItemFrame.origin.x = 0;
newItemFrame.size.width = myFrame.size.width;
newItemFrame.size.height = oldItemFrame.size.height;
[item setFrame:newItemFrame];
yPos += newItemFrame.size.height;
if (!NSEqualRects(newItemFrame, oldItemFrame)) {
[item setNeedsDisplay:YES];
}
}
[self setNeedsLayout:NO];
}
- (BOOL)isFlipped
{
return YES;
}
- (void)startDrag: (NSEvent )event
withItem: (TigerCollectionViewItem )item
{
// If the dragged item is selected then drag all selected items too. NSArray dragIndexes = nil; if ([item isSelected]) { dragIndexes = [self selectedIndexes]; } else { dragIndexes = [[[NSArray]] arrayWithObject: [[[NSNumber]] numberWithInt:[items indexOfObject:item]]]; }
// Write data to the paste board. NSPasteboard pboard = [[[NSPasteboard]] pasteboardWithName:NSDragPboard]; [pboard declareTypes:[[[NSArray]] arrayWithObjects:DRAG_ITEM_TYPE, NSFilenamesPboardType, nil] owner:self]; [pboard setPropertyList:dragIndexes forType:DRAG_ITEM_TYPE]; [pboard setPropertyList:[self filePathsForIndexes:dragIndexes] forType:NSFilenamesPboardType];
// Generate the drag image from the dragged items. NSPoint dragPos; NSImage dragImage = [self dragImageForIndexes:dragIndexes dragPoint:&dragPos];
// Start the drag.
[self dragImage:dragImage
at:dragPos
offset:NSZeroSize
event:event
pasteboard:pboard
source:self
slideBack:YES];
}
- (NSImage )dragImageForIndexes: (NSArray )indexes
dragPoint: (NSPoint )dragPoint
{
// Make an image as big as the visible rect. NSRect dragRect = [self convertRect:[self visibleRect] fromView:[self superview]]; NSImage dragImage = [[[[[NSImage]] alloc] initWithSize:dragRect.size] autorelease];
NSEnumerator e = [indexes objectEnumerator]; NSNumber indexNumber; while ((indexNumber = [e nextObject])) { TigerCollectionViewItem item = [items objectAtIndex:[indexNumber intValue]];
NSRect itemRect = [item visibleRect]; if (NSEqualRects(itemRect, NSZeroRect)) { continue; }
// Get an image of the dragged view without the selection.
BOOL oldSelectedValue = [item isSelected];
[item setIsSelected:NO];
NSData itemAsPDF = [item dataWithPDFInsideRect:itemRect];
[item setIsSelected:oldSelectedValue];
NSImage itemImage = [[NSImage alloc] initWithData:itemAsPDF];
// Convert from our flipped axis into the image's non-flipped axis.
NSPoint pos = [item frame].origin;
pos.y = dragRect.origin.y + dragRect.size.height - pos.y;
pos.y -= itemRect.size.height;
// Drag the view's image into the drag image.
[dragImage lockFocus];
[itemImage drawAtPoint:pos
fromRect:NSZeroRect
operation:NSCompositeSourceOver
fraction:DRAG_IMAGE_ALPHA];
[dragImage unlockFocus];
[itemImage release]; }
ASSERT(dragPoint); dragPoint = NSMakePoint(dragRect.origin.x, dragRect.origin.y + dragRect.size.height);
return dragImage;
}
- (void)itemClicked: (TigerCollectionViewItem )item
event: (NSEvent )event
{
NSArray oldSelection = [self selectedIndexes];
if (([event modifierFlags] & NSCommandKeyMask) != 0) { [item setIsSelected:![item isSelected]]; } else if (([event modifierFlags] & NSShiftKeyMask) != 0) { [self growSelectionToItem:item]; } else { [self setAllItemsSelected:NO]; [item setIsSelected:YES]; if ([event clickCount] == 2) { [[self target] performDoubleClickActionForIndex:[items indexOfObject:item]]; } } [self scrollToItem:item];
[self testSelectionChanged:oldSelection];
}
- (void)setAllItemsSelected: (BOOL)selected
{
NSEnumerator e = [items objectEnumerator]; TigerCollectionViewItem item; while ((item = [e nextObject])) { [item setIsSelected:selected]; }
}
- (void)growSelectionToItem: (TigerCollectionViewItem )item
{
NSArray oldSelection = [self selectedIndexes];
int itemIndex = [items indexOfObject:item]; int startIndex = [[oldSelection objectAtIndex:0] intValue]; int endIndex = [[oldSelection lastObject] intValue];
if (itemIndex < startIndex) {
startIndex = itemIndex;
} else if (itemIndex > endIndex) {
endIndex = itemIndex;
}
int i;
for (i = startIndex; i <= endIndex; i++) {
[[items objectAtIndex:i] setIsSelected:YES];
}
[self testSelectionChanged:oldSelection];
}
- (void)moveDown: (id)sender
{
BOOL shift = ([[NSApp currentEvent] modifierFlags] & NSShiftKeyMask) != 0; [self moveSelection:NO byExtending:shift];
}
- (void)moveUp: (id)sender
{
BOOL shift = ([[NSApp currentEvent] modifierFlags] & NSShiftKeyMask) != 0; [self moveSelection:YES byExtending:shift];
}
- (void)moveSelection: (BOOL)moveUp
byExtending: (BOOL)byExtending
{
if ([items count] == 0) {
return;
}
NSArray oldSelection = [self selectedIndexes];
int index = NSNotFound; if (moveUp) { int firstIndex = [[oldSelection objectAtIndex:0] intValue]; firstIndex--; if (firstIndex >= 0) { index = firstIndex; } } else { int lastIndex = [[oldSelection lastObject] intValue]; lastIndex++; if (lastIndex < [items count]) { index = lastIndex; } }
if (index != NSNotFound) { if (!byExtending) { [self setAllItemsSelected:NO]; } TigerCollectionViewItem item = [items objectAtIndex:index]; [item setIsSelected:YES]; [self scrollToItem:item]; }
[self testSelectionChanged:oldSelection];
}
- (void)scrollToItem: (TigerCollectionViewItem )item
{
NSRect itemFrame = [item frame]; NSPoint top, bottom; bottom.y = NSMaxY(itemFrame); top.y = NSMinY(itemFrame); top.x = 0; bottom.x = 0;
NSRect visibleRect = [self visibleRect]; BOOL bottomVisible = NSPointInRect(bottom, visibleRect); BOOL topVisible = NSPointInRect(top, visibleRect); if (!topVisible || !bottomVisible) { NSPoint scrollPos; if (!bottomVisible) { scrollPos.y = bottom.y - visibleRect.size.height; } else { scrollPos.y = top.y; } scrollPos.x = 0;
NSClipView clipView = [[self enclosingScrollView] contentView]; [clipView scrollToPoint:[clipView constrainScrollPoint:scrollPos]]; [[self enclosingScrollView] reflectScrolledClipView:clipView]; }
}
- (void)selectAll: (id)sender
{
NSArray oldSelection = [self selectedIndexes]; [self setAllItemsSelected:YES]; [self testSelectionChanged:oldSelection];
}
- (void)maintainNonEmptySelection: (int)index
{
NSArray oldSelection = [self selectedIndexes]; if ([items count] > 0 && [oldSelection count] == 0) { int selectionIndex = index; if (selectionIndex < 0) { selectionIndex = 0; } else if (selectionIndex >= [items count]) { selectionIndex = [items count] - 1; } [[items objectAtIndex:selectionIndex] setIsSelected:YES];
[self testSelectionChanged:oldSelection]; }
}
- (void)keyDown: (NSEvent )event
{
unichar u = [[event charactersIgnoringModifiers] characterAtIndex: 0];
if (u == NSDeleteCharacter || u == NSDeleteFunctionKey) { // Forward or backward delete. [self interpretKeyEvents:[[[NSArray]] arrayWithObject:event]]; } else if (u == NSEnterCharacter || u == NSCarriageReturnCharacter) { NSArray indexes = [self selectedIndexes]; if ([indexes count] > 0) { [[self target] performDoubleClickActionForIndex: [[indexes objectAtIndex:0] intValue]]; } } else { [super keyDown:event]; }
}
- (void)deleteBackward: (id)sender
{
NSArray indexes = [self selectedIndexes]; if ([indexes count] > 0 && [[self target] shouldRemoveItemsAtIndexes:indexes]) { [self removeItemsAtIndexes:indexes]; [self maintainNonEmptySelection:[[indexes objectAtIndex:0] intValue] - 1]; [[self window] makeFirstResponder:self]; }
}
- (void)deleteForward: (id)sender
{
NSArray indexes = [self selectedIndexes]; if ([indexes count] > 0 && [[self target] shouldRemoveItemsAtIndexes:indexes]) { [self removeItemsAtIndexes:indexes]; [self maintainNonEmptySelection:[[indexes objectAtIndex:0] intValue]]; [[self window] makeFirstResponder:self]; }
}
- (void)removeItemsAtIndexes: (NSArray )indexes
{
if ([indexes count] == 0) {
return;
}
NSMutableIndexSet indexSet = [[[NSMutableIndexSet]] indexSet];
NSEnumerator e = [indexes objectEnumerator]; NSNumber indexNumber; while ((indexNumber = [e nextObject])) { int index = [indexNumber intValue]; TigerCollectionViewItem item = [items objectAtIndex:index]; [item removeFromSuperview]; [indexSet addIndex:index]; }
[items removeObjectsAtIndexes:indexSet];
/
Need to force the layout to change right away so that scrolling and
selection code will work.
/
[self performLayout];
}
- (NSDragOperation)draggingEntered: (id<NSDraggingInfo>)sender
{
return [self draggingUpdated:sender];
}
- (void)draggingExited: (id<NSDraggingInfo>)sender
{
[self setDragTarget:nil draggingInfo:sender];
}
- (BOOL)prepareForDragOperation: (id<NSDraggingInfo>)sender
{
BOOL acceptDrop = NO; NSArray dragTypes = [[sender draggingPasteboard] types];
if ([dragTypes containsObject:DRAG_ITEM_TYPE]) {
acceptDrop = YES;
} else if ([dragTypes containsObject:NSFilenamesPboardType]) {
NSArray filePaths = [[sender draggingPasteboard]
propertyListForType:NSFilenamesPboardType];
acceptDrop = [[self target] dragOperationForFiles:filePaths] !=
NSDragOperationNone;
}
if (!acceptDrop) {
[self setDragTarget:nil draggingInfo:sender];
}
return acceptDrop;
}
- (BOOL)performDragOperation: (id<NSDraggingInfo>)sender
{
int destIndex = [self dragTargetIndex]; ASSERT(destIndex != NSNotFound); [self setDragTarget:nil draggingInfo:sender];
NSArray dragTypes = [[sender draggingPasteboard] types]; if ([dragTypes containsObject:DRAG_ITEM_TYPE]) { NSArray indexes = [[sender draggingPasteboard] propertyListForType:DRAG_ITEM_TYPE]; [[self target] dragItemsAtIndexes:indexes toIndex:destIndex]; } else if ([dragTypes containsObject:NSFilenamesPboardType]) { NSArray filePaths = [[sender draggingPasteboard] propertyListForType:NSFilenamesPboardType]; [[self target] dragFiles:filePaths toIndex:destIndex]; } return YES;
}
- (NSDragOperation)draggingUpdated: (id<NSDraggingInfo>)sender
{
NSPoint dragPos = [[self superview] convertPoint:[sender draggingLocation] fromView:nil]; NSView targetView = [self hitTest:dragPos];
NSDragOperation dragOperation = NSDragOperationNone; NSArray dragTypes = [[sender draggingPasteboard] types]; if ([dragTypes containsObject:DRAG_ITEM_TYPE]) { dragOperation = NSDragOperationMove; } else if ([dragTypes containsObject:NSFilenamesPboardType]) { NSArray filePaths = [[sender draggingPasteboard] propertyListForType:NSFilenamesPboardType]; dragOperation = [[self target] dragOperationForFiles:filePaths]; }
if (dragOperation == NSDragOperationNone) { [self setDragTarget:nil draggingInfo:sender]; } else { [self setDragTarget:targetView draggingInfo:sender]; } return dragOperation;
}
- (BOOL)wantsPeriodicDraggingUpdates
{
return NO;
}
- (NSDragOperation)draggingSourceOperationMaskForLocal: (BOOL)isLocal
{
if (isLocal) {
return NSDragOperationMove;
} else {
return NSDragOperationLink;
}
}
- (int)indexFromDragTarget: (NSView )targetView
draggingInfo: (id<NSDraggingInfo>)draggingInfo
{
int index = NSNotFound; if (targetView && [targetView isKindOfClass:[[[TigerCollectionViewItem]] class]]) { index = [items indexOfObject:targetView]; }
if (index != NSNotFound) { TigerCollectionViewItem item = [items objectAtIndex:index]; NSPoint viewPos = [item convertPoint:[draggingInfo draggingLocation] fromView:nil]; NSRect bounds = [item bounds]; if (viewPos.y < bounds.size.height / 2.0) { index = fmin(index + 1, [items count]); } }
return index;
}
- (void)setDragTarget: (NSView )targetView
draggingInfo: (id<NSDraggingInfo>)draggingInfo
{
int newDragTargetIndex = [self indexFromDragTarget:targetView
draggingInfo:draggingInfo];
int curDragTargetIndex = [self dragTargetIndex];
if (newDragTargetIndex != curDragTargetIndex) {
[self setIndex:curDragTargetIndex isDragTarget:NO];
[self setIndex:newDragTargetIndex isDragTarget:YES];
}
}
- (void)setIndex: (int)index
isDragTarget: (BOOL)isDragTarget
{
if (index != NSNotFound) { DragTargetType dragTargetType = isDragTarget ? DragTargetType_Top : DragTargetType_None; int actualIndex = index; if (actualIndex == [items count]) { actualIndex = [items count] - 1; if (isDragTarget) { dragTargetType = DragTargetType_Bottom; } } [[items objectAtIndex:actualIndex] setDragTargetType:dragTargetType]; }
}
- (id<TigerCollectionViewTarget>)target
{
return target;
}
- (int)dragTargetIndex
{
int count = [items count];
int i;
for (i = 0; i < count; i++) {
TigerCollectionViewItem item = [items objectAtIndex:i];
if ([item dragTargetType] == DragTargetType_Top) {
return i;
} else if ([item dragTargetType] == DragTargetType_Bottom) {
return i + 1;
}
}
return NSNotFound;
}
- (void)resizeWithOldSuperviewSize: (NSSize)oldBoundsSize
{
[super resizeWithOldSuperviewSize:oldBoundsSize]; [self performSelector:@selector(maximizeViewWidth:) withObject:nil afterDelay:0.10]; //[self maximizeViewWidth:nil];
}
- (void)maximizeViewWidth: (id)sender
{
float width = [[[self enclosingScrollView] contentView] frame].size.width; NSRect myOldFrame = [self frame]; if (myOldFrame.size.width != width) { [self setFrameSize:NSMakeSize(width, myOldFrame.size.height)]; [self setNeedsDisplay:YES]; }
}
- (void)onKeyWindowChanged: (NSNotification )notification
{
[self setNeedsDisplay:YES];
NSEnumerator e = [items objectEnumerator]; TigerCollectionViewItem item; while ((item = [e nextObject])) { [item updateHighlightState]; }
}
- (void)testSelectionChanged: (NSArray )oldSelection
{
BOOL didChange = NO;
if (!oldSelection) {
didChange = YES;
} else {
NSArray newSelection = [self selectedIndexes];
didChange = ![oldSelection isEqualToArray:newSelection];
}
if (didChange) {
[[self target] onSelectionDidChange];
}
}
- (NSArray )filePathsForIndexes: (NSArray )indexes
{
NSMutableArray filePaths = [[[NSMutableArray]] array];
NSEnumerator e = [indexes objectEnumerator]; NSNumber indexNumber; while ((indexNumber = [e nextObject])) { NSString filePath = [[self target] filePathForIndex:[indexNumber intValue]]; if (filePath) { [filePaths addObject:filePath]; } } return filePaths;
}
@end // TigerCollectionView (Private)
@implementation TigerCollectionViewItem
- (void)dealloc
{
[cachedTextColors release]; cachedTextColors = nil; [super dealloc];
}
- (void)awakeFromNib {
[self setNextResponder:[self superview]];
}
- (void)drawRect: (NSRect)rect
{
[super drawRect:rect];
if ([self isSelected]) {
if ([self shouldDrawSecondaryHighlight]) {
[[NSColor grayColor] set];
} else {
[[NSColor blueColor] set];
}
NSRectFill(rect);
}
if (dragTargetType != DragTargetType_None) {
NSRect dRect = [self bounds];
if (dragTargetType == DragTargetType_Top) {
dRect.origin.y = dRect.size.height - 2.0;
}
dRect.size.height = 2;
[[NSColor blackColor] set];
NSRectFill(dRect);
}
}
@end // TigerCollectionViewItem
@implementation TigerCollectionViewItem (Private)
- (NSMenu )menuForEvent:(NSEvent )event
{
if (![self isSelected]) {
[[self collectionView] itemClicked:self event:event];
}
return [[self superview] menuForEvent:event];
}
- (NSView )hitTest: (NSPoint)point
{
NSView result = [super hitTest:point]; if (result && ![result isKindOfClass:[[[NSButton]] class]]) { return self; } else { return result; }
}
- (void)mouseDown: (NSEvent )event
{
if ([self isLeftClickEvent:event]) {
mouseDownPos = [event locationInWindow];
}
}
- (void)mouseUp: (NSEvent )event
{
if ([self isLeftClickEvent:event]) {
[[self collectionView] itemClicked:self event:event];
}
}
- (void)mouseDragged: (NSEvent )event
{
if ([self isLeftClickEvent:event]) {
NSPoint mouseDragPos = [event locationInWindow];
float distance = PointDistance(mouseDragPos, mouseDownPos);
if (distance > DRAG_START_DISTANCE) {
[[self collectionView] startDrag:event withItem:self];
}
}
}
- (BOOL)acceptsFirstResponder
{
return NO;
}
- (void)setIsSelected: (BOOL)flag
{
if (isSelected != flag) {
isSelected = flag;
[self updateHighlightState];
[self setNeedsDisplay:YES];
}
}
- (BOOL)isSelected
{
return isSelected;
}
- (TigerCollectionView )collectionView
{
ASSERT([[self superview] isKindOfClass:[[[TigerCollectionView]] class]]); return (TigerCollectionView )[self superview];
}
- (BOOL)isLeftClickEvent: (NSEvent )event
{
return [event buttonNumber] == 0 &&
([event modifierFlags] & NSControlKeyMask) == 0;
}
- (void)setDragTargetType: (DragTargetType)type
{
if (dragTargetType != type) {
dragTargetType = type;
[self setNeedsDisplay:YES];
}
}
- (DragTargetType)dragTargetType
{
return dragTargetType;
}
- (void)updateHighlightState
{
BOOL isHighlighted = [self isSelected] &&
![self shouldDrawSecondaryHighlight];
NSEnumerator e = [[self subviews] objectEnumerator]; id subview; while ((subview = [e nextObject])) { if ([subview isKindOfClass:[[[NSTextField]] class]]) { [self setHighlight:isHighlighted forTextField:(NSTextField )subview]; } else if ([subview respondsToSelector:@selector(setIsSelected:)]) { [subview setIsSelected:isHighlighted]; } }
}
- (void)setHighlight: (BOOL)isHighlighted
forTextField: (NSTextField )textField
{
NSNumber key = [[[NSNumber]] numberWithInt:[textField hash]];
if (!cachedTextColors) {
cachedTextColors = [[NSMutableDictionary alloc] init];
}
if (isHighlighted) {
if (![cachedTextColors objectForKey:key]) {
[cachedTextColors setObject:[textField textColor] forKey:key];
[textField setTextColor:[[[NSColor]] whiteColor]];
}
} else {
if ([cachedTextColors objectForKey:key]) {
[textField setTextColor:[cachedTextColors objectForKey:key]];
[cachedTextColors removeObjectForKey:key];
}
}
}
- (BOOL)shouldDrawSecondaryHighlight
{
if ([[self window] isKeyWindow]) {
return NO;
} else {
return YES;
}
}
@end // TigerCollectionViewItem (Private)
