Re: Scrolling List of Thumbnails?
Re: Scrolling List of Thumbnails?
- Subject: Re: Scrolling List of Thumbnails?
- From: Jerry LeVan <email@hidden>
- Date: Fri, 18 Jun 2004 20:08:26 -0400
Below is my code for creating a scrolling list of images. The cells
are sized to 200x200.
Regrettably, the code is not swift and uses a lot of memory. One
of my directories contains almost 100 images of size 9-14 MB.
Top shows VM at almost one gig ( on my one gig g4 quicksilver 2002).
I would have thought that since the images are scaled to 200x200 that
the memory usage would not be nearly this high...Am I missing something?
"thumbArray" is really a one column matrix of "ActionImageCell"s
(thanks John)
"filesLeft" is a text field in the FileCount nib, it displays the number
of files left to process. (displayIfNeeded was really needed :)
Jerry
- (IBAction)openFile:(id)sender
{
int fcnt; // number of files
int mcnt; // current size of thumbMatrix
int i; // counter
// Get list of files to process
NSOpenPanel *op = [NSOpenPanel openPanel];
[op setCanChooseDirectories:YES];
[op setCanChooseFiles:NO];
int returnCode = [op runModalForTypes:nil];
if (returnCode != NSOKButton) {
return;
}
NSString *path = [op filename];
NSMutableArray *tmp = [NSMutableArray arrayWithCapacity:10];
// get all of the filenames for images we understand in the directory
[self getFileList: tmp withPath:path];
if([tmp count] == 0) return; // no image files
[fileNameList setArray: tmp];
// Get the size of the filenamelist array
fcnt = [fileNameList count];
//Make sure we have enough items in the matrix
while( fcnt < [thumbArray numberOfRows]) { [thumbArray
removeRow:[thumbArray numberOfRows]-1];}
while (fcnt > [thumbArray numberOfRows]) { [thumbArray addRow];}
// load the progress indicator...
if(!thePanel) {
[NSBundle loadNibNamed: @"FileCount" owner:self];
}
[thePanel orderFront:self];
[progressInd setUsesThreadedAnimation:YES];
[progressInd startAnimation:self];
fileCtr=fcnt;
for(i=0 ; i< fcnt ; i++) {
NSImage * tmp= [[NSImage
alloc]initWithContentsOfFile:(NSString*)[fileNameList
objectAtIndex:i]];
[[thumbArray cellAtRow:i column:0] setImage: tmp];
[[thumbArray cellAtRow:i column:0] setTarget:self];
[[thumbArray cellAtRow:i column:0] setAction:@selector(showMe:)];
[tmp release];
[filesLeft setIntValue: fileCtr--];
[filesLeft displayIfNeeded];
}
[progressInd stopAnimation:self];
[thePanel orderOut:self]; // hide the panel
if(displayedImage) { [displayedImage release]; displayedImage=NULL;}
[thumbArray sizeToCells];
[thumbArray setNeedsDisplay];
}
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