I've just created my first view-based NSTableView in Interface Builder and I've correctly set up the data source and the bindings to update the views in the tableview. Each view has two labels and a NSProgressIndicator. Updating the progress indicator through the bindings and the data source works perfectly, but I'd like to change its state from determinate to indeterminate at some time. As my NSTableCellView subclass has access to the progress indicator, how can I get access to the cell view at a given row index? I've tried calling viewAtColumn:row:makeIfNecessary: on the tableview with both NO and YES for the makeIfNecessary argument, but neither seems to work.
Solution 1: In your NSTableCellView subclass add a property (IBOutlet) for your NSProgressIndicator control. Wire it in IB to set the property when the view is loaded. You can then access the progress control in your cell view subclass by using the property.
Solution 2: In IB give your NSProgressIndicator a unique integer tag. In your cell view subclass use [self viewWithTag:] to get the object.
I am not sure about the answer to your main question but you can bind the indeterminate state as well. In IB Is Indeterminate is listed in the Parameters section.
Related
A .nib file contains NSOutlineView (1-column, view-based). Column has identifier "UserCell"; it also has one cell which has two NSTextField's and bunch of buttons; this cell also has identifier "UserCell". Class for this cell is set in IB to be a custom class derived from NSTableCellView class. I option-dragged both NSTextField's to the custom code (see picture attached) to create IBOutlets.
In delegate's method -outlineView:viewForTableColumn:item: I load cell using -makeViewWithIdentifier:owner: and it loads fine - I get my custom cell view object. However, both text fields are nil's.
How one should fix it? The same story with NSTableView.
I am using a view-based table, and I want to create an outlet for an element in a cell view. I cannot get the outlet to connect though... it's always nil.
Specifically, I have a NSProgressIndicator in a table cell and want to manipulate it in code.
Here's what I have so far:
I have created a subclass of NSTableView, with the corresponding outlet property:
#interface MyTableCellView : NSTableCellView
#property IBOutlet NSProgressIndicator *myProgressIndicator;
#end
#implementation MyTableCellView
-(void)awakeFromNib
{
// _myProgressIndicator is nil!
}
#end
And I have set the custom class in the nib. The existing NSTableCellView is replaced with MyTableCellView via the dropdown.
At this point, some observations:
If I Ctrl+Click and drag the progress indicator to connect this outlet, it is not shown.
Likewise, if I try to Ctrl+Click and drag the progress indicator using the assistant editor, I can only connect to the property via binding. It doesn't recognize this as a valid outlet.
However this outlet IS shown on the sidebar, with a warning that it doesn't exist:
I know MyTableCellView is being used. Breakpoint on awakeFromNib confirms this, and confirms that _myProgressIndicator is nil.
This is a sandbox project, with barely more than what I've described.
SO, how do I access this progress indicator from code?
I don't believe you should do it that way; instead:
Modify the model object used by the table view's data source to populate the table view.
Call the table view reloadData (or better reloadDataForRowIndexes:columnIndexes:).
Therefore you should only need an outlet to the table view to do this and any modification of the table view's cell objects should be done within the table view delegate and/or data source methods.
As described in the question, the usual method to connect outlets in Interface Builder does not work (maybe it is fixed in a recent version of Xcode, I am still using a version earlier than 6). Anyhow, it does work via the Connections Inspector.
Create an IBOutlet in your subclass of NSTableCellView.
In your XIB, from Identity Inspector, change the NSTableCellView to your subclass.
From Connections Inspector, drag from your outlet to the View object.
I have a very basic setup with a NSCollectionView. I have a subclassed NSCollectionViewItem which is used as the itemPrototype for the collection view. The collection view item has a view.
Using Interface Builder, I added an NSImageView to the collection view item's view and connected an IBOutlet to the instance of my collection view item subclass. The property for the IBOutlet is uses retain for its memory management.
My goal is to hide or show this image view whenever the selection state for the collection view item changes. But within the setSelected: method my property for the image view is nil, even though I am 100% sure its outlet is connected, its property is set to retain and i have not unset or released the image view.
I had a similar issue with collection view items where an activity indicator added to the view was always nil too. Why does this happen and what do I need to do to fix it?
As far as I now, IBOutlets pointing to non-top level objects in nib/xib file should be defined (weak).
Are you sure you have changed the class of NSCollectionView item correctly?
When breaking in setSelected:, and doing a po self in the debugger console, are you seeing the name of your class?
As the title suggest, I've enabled right clicks for my tableview with customized rows. Anywhere there is an NSTextField, it blocks the right click.
is there a userInteractionEnabled equivalent for cocoa like on the iphone?
I though I probably needed to subclass everything in my NSTableCellView subclass, but I just needed to override -(NSView*)hitTest:(NSPoint)aPoint method in my NSTableCellView subclass to return self.
I'm able to right click on text fields within my custom view based table view cell. Here is how I configure it:
NSTextField *tf = [[NSTextField alloc] initWithFrame:NSZeroRect];
self.textField = tf;
self.imageView.autoresizingMask=NSViewWidthSizable;
self.textField.editable=NO;
self.textField.selectable=NO;
self.textField.drawsBackground=NO;
self.textField.bordered=NO;
self.textField.bezeled=NO;
self.textField.target=self;
self.textField.action=#selector(textDidEndEditing:);
[self.textField.cell setLineBreakMode:NSLineBreakByTruncatingMiddle];
Also, make sure you are setting the -menu property of NSTableView and not the cell view to enable to menu. (I don't know if that will make a difference to your issue but it is how I do right clicking in a table view.)
I made a Cocoa application that has an NSTableView, an NSTextField, and an NSButton. The user enters text into the text field and clicks the button. When the user does this, I want the text in the textfield to be placed in the NSTableView. I find that I can't even bind an IBOutlet to a cell in the NSTableView. What should be done?
The Model-View-Controller pattern, which is used extensively in Cocoa is your friend here.
What you need to do is to bind the NSTableView to an array (The model). Then configure the button so that a click tells the controller to add the content of the text field to the array and if the bindings are set up correctly the NSTableView (The View) will be updated.
What I think you need to do is make a class, AppController for instance which will be your data source and the delegate of the NSTableView. So you need the following.
Two IBOutlets (one for the NSTextField and one for the NSTableView)
An IBAction for the NSButton.
Make those connections in Interface Builder.
Remember to use the mandatory delegate methods (there are two of them) so you can add the data from your data source (usually a collection class..an array, dictionary...etc.