Retired Document
Important: This sample code may not represent best practices for current development. The project may use deprecated symbols and illustrate technologies and techniques that are no longer recommended.
DisplayController.m
/* |
File: DisplayController.m |
Abstract: A window controller to display the titles of the text snippets. |
Version: 1.1 |
Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple |
Inc. ("Apple") in consideration of your agreement to the following |
terms, and your use, installation, modification or redistribution of |
this Apple software constitutes acceptance of these terms. If you do |
not agree with these terms, please do not use, install, modify or |
redistribute this Apple software. |
In consideration of your agreement to abide by the following terms, and |
subject to these terms, Apple grants you a personal, non-exclusive |
license, under Apple's copyrights in this original Apple software (the |
"Apple Software"), to use, reproduce, modify and redistribute the Apple |
Software, with or without modifications, in source and/or binary forms; |
provided that if you redistribute the Apple Software in its entirety and |
without modifications, you must retain this notice and the following |
text and disclaimers in all such redistributions of the Apple Software. |
Neither the name, trademarks, service marks or logos of Apple Inc. may |
be used to endorse or promote products derived from the Apple Software |
without specific prior written permission from Apple. Except as |
expressly stated in this notice, no other rights or licenses, express or |
implied, are granted by Apple herein, including but not limited to any |
patent rights that may be infringed by your derivative works or by other |
works in which the Apple Software may be incorporated. |
The Apple Software is provided by Apple on an "AS IS" basis. APPLE |
MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION |
THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS |
FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND |
OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS. |
IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL |
OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, |
MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED |
AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE), |
STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE |
POSSIBILITY OF SUCH DAMAGE. |
Copyright (C) 2010 Apple Inc. All Rights Reserved. |
*/ |
#import "AppDelegate.h" |
#import "DisplayController.h" |
#import "Step.h" |
@implementation DisplayController |
@synthesize arrayController, tableView; |
#pragma mark - |
#pragma mark Services methods |
-(NSString *)textForCurrentSelectionAndAdvance { |
NSString *string = nil; |
NSUInteger selectedRow = [arrayController selectionIndex]; |
if (selectedRow != NSNotFound) { |
Step *step = (Step *)[[arrayController arrangedObjects] objectAtIndex:selectedRow]; |
string = step.body; |
if (string == nil) { |
string = @""; |
} |
[self moveDownOneLine]; |
} |
else { |
string = @""; |
} |
return string; |
} |
- (void)rewind { |
[tableView selectRowIndexes:[NSIndexSet indexSetWithIndex:0] byExtendingSelection:NO]; |
[tableView scrollRowToVisible:0]; |
} |
- (void)moveUpOneLine { |
NSUInteger selectedRow = [arrayController selectionIndex]; |
if ((selectedRow > 0) && (selectedRow != NSNotFound)) { |
[tableView selectRowIndexes:[NSIndexSet indexSetWithIndex:(selectedRow -1)] byExtendingSelection:NO]; |
[tableView scrollRowToVisible:(selectedRow -1)]; |
} |
} |
- (void)moveDownOneLine { |
NSUInteger selectedRow = [arrayController selectionIndex]; |
if (selectedRow == NSNotFound) { |
return; |
} |
selectedRow++; |
if (selectedRow < [[arrayController arrangedObjects] count]) { |
[arrayController setSelectionIndex:selectedRow]; |
[tableView scrollRowToVisible:selectedRow]; |
} |
} |
#pragma mark - |
#pragma mark Table view delegate methods |
- (NSString *)tableView:(NSTableView *)aTableView toolTipForCell:(NSCell *)aCell rect:(NSRectPointer)rect tableColumn:(NSTableColumn *)aTableColumn row:(NSInteger)row mouseLocation:(NSPoint)mouseLocation { |
// If user defaults allows tooltips, then return the step's tooltip. |
if ([[[[NSUserDefaultsController sharedUserDefaultsController] |
values] valueForKey:DMKDisplayToolTipsKey] boolValue]) { |
Step *step = (Step *)[[arrayController arrangedObjects] objectAtIndex:row]; |
return step.tooltip; |
} |
return nil; |
} |
- (BOOL)tableView:(NSTableView *)aTableView shouldSelectRow:(NSInteger)rowIndex { |
// For convenience, automatically write the row to the pasteboard then make sure the next row is displayed, ready for the next selection. |
BOOL ok = [self writeRow:rowIndex toPasteboard:[NSPasteboard generalPasteboard]]; |
if (ok && (rowIndex < [[arrayController arrangedObjects] count] -1)) { |
[self performSelector:@selector(scrollTableViewToRow:) withObject:[NSNumber numberWithInteger:(rowIndex+1)] afterDelay:0.1]; |
} |
return ok; |
} |
- (BOOL)tableView:(NSTableView *)tv writeRowsWithIndexes:(NSIndexSet *)rowIndexes toPasteboard:(NSPasteboard*)pboard { |
// Don't write anything if more than one row is selected. |
if ([rowIndexes count] != 1) { |
return NO; |
} |
NSInteger row = [rowIndexes firstIndex]; |
if (row < [[arrayController arrangedObjects] count] -1) { |
[self performSelector:@selector(scrollTableViewToRow:) withObject:[NSNumber numberWithInteger:(row+1)] afterDelay:0.1]; |
} |
return [self writeRow:row toPasteboard:pboard]; |
} |
#pragma mark - |
#pragma mark Table view drag and drop |
/* |
The display table view shouldn't support drag and drop or any reordering. |
*/ |
- (NSDragOperation)tableView:(NSTableView*)tv validateDrop:(id <NSDraggingInfo>)info proposedRow:(NSInteger)row proposedDropOperation:(NSTableViewDropOperation)op { |
return NSDragOperationNone; |
} |
- (BOOL)tableView:(NSTableView*)tv acceptDrop:(id <NSDraggingInfo>)info row:(NSInteger)row dropOperation:(NSTableViewDropOperation)op { |
return NO; |
} |
#pragma mark - |
#pragma mark Scroll to view |
- (void)scrollTableViewToRow:(NSNumber *)row { |
[tableView scrollRowToVisible:[row integerValue]]; |
} |
#pragma mark - |
#pragma mark Writing rows |
- (BOOL)writeRow:(NSInteger)row toPasteboard:(NSPasteboard*)pboard { |
// For the display window, just write the selected step's body, not the complete step. |
Step *step = (Step *)[[arrayController arrangedObjects] objectAtIndex:row]; |
NSString *stepBody = step.body; |
if (stepBody == nil) { |
return NO; |
} |
[pboard clearContents]; |
[pboard writeObjects:[NSArray arrayWithObject:stepBody]]; |
return YES; |
} |
#pragma mark - |
#pragma mark Window transparency |
/* |
Observe the shared user defaults controller for changes to the displayWindowAlpha preference. |
Update the window's alpha value in response. |
*/ |
static const NSString *windowAlphaContext; |
- (void)windowDidLoad { |
[super windowDidLoad]; |
[tableView setDraggingSourceOperationMask:NSDragOperationCopy forLocal:NO]; |
NSUserDefaultsController *udc = [NSUserDefaultsController sharedUserDefaultsController]; |
NSString *displayWindowAlphaKeyPath = [@"values." stringByAppendingString:DMKDisplayWindowAlphaKey]; |
[udc addObserver:self forKeyPath:displayWindowAlphaKeyPath options:0 context:&windowAlphaContext]; |
[[self window] setAlphaValue:[[udc valueForKeyPath:displayWindowAlphaKeyPath] floatValue]]; |
} |
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context { |
if (context != &windowAlphaContext) { |
[super observeValueForKeyPath:keyPath ofObject:object change:change context:context]; |
return; |
} |
[[self window] setAlphaValue:[[object valueForKeyPath:[@"values." stringByAppendingString:DMKDisplayWindowAlphaKey]] floatValue]]; |
} |
#pragma mark - |
#pragma mark Object lifecycle |
- (void) dealloc { |
NSUserDefaultsController *udc = [NSUserDefaultsController sharedUserDefaultsController]; |
[udc removeObserver:self forKeyPath:[@"values." stringByAppendingString:DMKDisplayWindowAlphaKey]]; |
[super dealloc]; |
} |
@end |
Copyright © 2010 Apple Inc. All Rights Reserved. Terms of Use | Privacy Policy | Updated: 2010-08-31