Databases
StackOverflow2013
Postsdbo
POGetting an NSImage from an NSProgressIndicator
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POGetting an NSImage from an NSProgressIndicator
    primarykey
    data
    text
    <p>I need to put the image from an NSProgressIndicator into an NSOutlineView Cell. I have written up code that does this for a determinate indicator and it works just great:</p> <pre><code>NSProgressIndicator *progressIndicator = [[NSProgressIndicator alloc] initWithFrame:NSMakeRect(0, 0, 16, 16)]; [progressIndicator setStyle:NSProgressIndicatorSpinningStyle]; [progressIndicator setIndeterminate:NO]; [progressIndicator setMaxValue:100.0]; [progressIndicator setDoubleValue:somePercentage]; NSImage *updateImage = [[NSImage alloc] initWithData:[progressIndicator dataWithPDFInsideRect:[progressIndicator frame]]]; [progressIndicator release]; return [updateImage autorelease]; </code></pre> <p>I have tried to modify the code to also give me indeterminate indicator images. However for the indeterminate case, I always get a blank 16x16 image. (I have confirmed this by writing the image to a file in each case, the determinate case gives me the progress indicator image, the indeterminate case is always 16x16 white square).</p> <p>The modified code is:</p> <pre><code>if(self.lengthUnknown) { NSProgressIndicator *progressIndicator = [[NSProgressIndicator alloc] initWithFrame:NSMakeRect(0, 0, 16, 16)]; [progressIndicator setStyle:NSProgressIndicatorSpinningStyle]; [progressIndicator setIndeterminate:YES]; NSImage *updateImage = [[NSImage alloc] initWithData:[progressIndicator dataWithPDFInsideRect:[progressIndicator frame]]]; [progressIndicator release]; return [updateImage autorelease]; } else { // Same code as the first listing, this case works fine } </code></pre> <p>Do indeterminate progress indicators use some type of drawing that causes -dataWithPDFInsideRect: to be unable to capture their image?</p> <hr> <p>More information: I tried setting the progress indicator to not use threaded animation as well as trying to grab the contents through NSImage's lockFocus method as suggested below but neither of those attempts made a difference.</p> <p>The progress indicator cell code that Dave mentions below (<a href="http://www.harmless.de/cocoa-code.php" rel="nofollow noreferrer">AMIndeterminateProgressIndicatorCell</a>) is a great workaround, but I would still like to know why I can't use the same technique that works with the determinate mode.</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USNed Batchelder
    1. USlfalin
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POGetting an NSImage from an NSProgressIndicator
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POGetting an NSImage from an NSProgressIndicator
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. POGetting an NSImage from an NSProgressIndicator
      1. This table or related slice is empty.
      1. VTUpMod
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload