/*
File: AppController.m
Abstract: Application Controller object, and the NSBrowser delegate. An instance of this object is in the MainMenu.xib.
Version: 1.1
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*/
#import "AppController.h"
#import "FileSystemNode.h"
// Turn on or off this define to use the new SnowLeopard item-based API
#define USE_ITEM_BASED_API 1
@implementation AppController
- (void)dealloc {
[_rootNode release];
[super dealloc];
}
- (void) awakeFromNib
{
[_browser setDelegate:self];
[_browser setDraggingSourceOperationMask:NSDragOperationAll forLocal:NO];
}
- (BOOL)browser:(NSBrowser *)browser canDragRowsWithIndexes:(NSIndexSet *)rowIndexes inColumn:(NSInteger)column withEvent:(NSEvent *)event
{
return YES;
}
- (BOOL)browser:(NSBrowser *)browser writeRowsWithIndexes:(NSIndexSet *)rowIndexes inColumn:(NSInteger)column toPasteboard:(NSPasteboard *)pasteboard
{
BOOL bValue;
NSInteger row = [rowIndexes lastIndex];
FileSystemNode *item = [browser itemAtRow:row inColumn:column];
[pasteboard declareTypes:@[NSPasteboardTypeString, NSPasteboardTypeHTML] owner:self];
bValue = [pasteboard setString:item.displayName forType:NSPasteboardTypeString];
bValue = [pasteboard setString:[NSString stringWithFormat:@"<html><body>%@</body></html>", item.displayName] forType:NSPasteboardTypeHTML];
return YES;
}
#if USE_ITEM_BASED_API
// This method is optional, but makes the code much easier to understand
- (id)rootItemForBrowser:(NSBrowser *)browser {
if (_rootNode == nil) {
_rootNode = [[FileSystemNode alloc] initWithURL:[NSURL fileURLWithPath:@"/"]];
}
return _rootNode;
}
- (NSInteger)browser:(NSBrowser *)browser numberOfChildrenOfItem:(id)item {
FileSystemNode *node = (FileSystemNode *)item;
return node.children.count;
}
- (id)browser:(NSBrowser *)browser child:(NSInteger)index ofItem:(id)item {
FileSystemNode *node = (FileSystemNode *)item;
return [node.children objectAtIndex:index];
}
- (BOOL)browser:(NSBrowser *)browser isLeafItem:(id)item {
FileSystemNode *node = (FileSystemNode *)item;
return !node.isDirectory;
}
- (id)browser:(NSBrowser *)browser objectValueForItem:(id)item {
FileSystemNode *node = (FileSystemNode *)item;
return node.displayName;
}
#else
// This is a utility method to find the parent item for a given column. The item based API eliminates the need for this method.
- (FileSystemNode *)parentNodeForColumn:(NSInteger)column {
if (_rootNode == nil) {
_rootNode = [[FileSystemNode alloc] initWithURL:[NSURL fileURLWithPath:@"/"]];
}
FileSystemNode *result = _rootNode;
// Walk up to this column, finding the selected row in the column before it and using that in the children array
for (NSInteger i = 0; i < column; i++) {
NSInteger selectedRowInColumn = [_browser selectedRowInColumn:i];
FileSystemNode *selectedChildNode = [result.children objectAtIndex:selectedRowInColumn];
result = selectedChildNode;
}
return result;
}
// Non-item based API example. This code will work on all systems, but applications targeting SnowLeopard and higher should use the new item-based API.
- (NSInteger)browser:(NSBrowser *)sender numberOfRowsInColumn:(NSInteger)column {
FileSystemNode *parentNode = [self parentNodeForColumn:column];
return parentNode.children.count;
}
- (void)browser:(NSBrowser *)sender willDisplayCell:(NSBrowserCell *)cell atRow:(NSInteger)row column:(NSInteger)column {
// Lazily setup the cell's properties in this method
FileSystemNode *parentNode = [self parentNodeForColumn:column];
FileSystemNode *childNode = [parentNode.children objectAtIndex:row];
[cell setTitle:childNode.displayName];
[cell setLeaf:!childNode.isDirectory];
}
#endif
@end