I want to have the table view cell expand and show the buttons that I have laid out below the visible view when the cell isn't selected. So far I have managed to expand the cell so that the entire view shows with the buttons, but there is one major problem with this....
The buttons that are supposed to be revealed only when the cell is selected always appear in the table, and the table view looks really weird becuase for each cell there are buttons overlapping the next cell which were supposed to be hidden!
I have tired making a subclass of the cell, but I am stuck because when I override the setSelected method to show the button, all the buttons from all the cells show up, not just the one I clicked, Ill provide my code below.
I there an easier way to show the buttons without using a subclass? And if not how could I use the subclass in a way that wouldn't show all the buttons for all the cells?
Cell Subclass (.m file)
- (void)awakeFromNib {
// Initialization code
editHidden.hidden = YES;
removeHidden.hidden = YES;
}
- (void)setSelected:(BOOL)selected animated:(BOOL)animated {
[super setSelected:selected animated:animated];
editHidden.hidden = NO;
removeHidden.hidden = NO;
// Configure the view for the selected state
}
Your table view delegate needs to implement tableView:heightForRowAtIndexPath:. Implement this method to return the correct height for your cell given the state that it is in (collapsed or expanded). When it comes time to expand your cell you should update your state and call [tableView beginUpdates]; [tableView endUpdates]; to have it recalculate and relayout the tableview.
Related
I have an NSOutlineView which when a row in the outline view is double-clicked, an NSPopover is displayed using the following code:
-(void)doubleClick:(id)nid{
NSLog(#"Test double click");
[_popover showRelativeToRect:[nid bounds] ofView:nid preferredEdge:NSMaxXEdge];
}
The code works fine but places the popover in the middle of the vertical height of the outline view. I would like the popup to appear next to the row which is selected (double-clicked) in the outline view. Is there a call I can make to the Outline View to return the position of the selected row? I couldn't seem to find such a method in the documentation. Clearly I would replace [nid bounds] which such a call. Else, any other suggestions of how I could work around this would be appreciated.
Don't forget that NSOutlineView inherits from NSTableView. You're looking for -frameOfCellAtColumn:row:. The column is probably 0. The row you can obtain with -selectedRow.
If your outline view is view-based, you could also pass the row view (-rowViewAtRow:makeIfNecessary:) and NSZeroRect for the rect to -showRelativeToRect:..., so it automatically tracks the row.
I have a NSTextField which is nested by a custom view and I want to change the default behavior of multiple clicks in a row (double click, tripple click etc.), similarly to the behavior of text nodes MindNode (see the image below).
I want the first click to "activate" the text field and then go on from the beginning (like reseting the click count of the event).
I have following ideas, but I don't know how to implement them and if they actually make sense:
Somehow change the time using +[NSEvent doubleClickInterval] and slow down the second click.
Reduce the click count programmatically?
Make the NSTextField non-selectable using -hitTest:, forward the click to the superview, change some parameter of the text field and accept the next clicks. In this case, the click count of the second click is still 2.
Override -mouseDown: and not call super. This breaks the NSTextField's selection functionality.
I hope there is an easier way to achieve this, which I have overlooked.
Thanks for your answers!
Here is a graphical representation of the problem:
I would do this by embedding the text field and a custom view in an NSBox, which would be set to the custom type, initially with no background color or border (so it would be invisible). Initially, the custom view would be on top and it would have a mouseDown: method that would receive the first click. In that method you could rearrange the box's subviews so that the text field would then be on top and receive the next clicks. If you wanted, the box could be somewhat bigger than the text field so you could give it a background color or other drawing that would look like a custom activation ring around the text field. In the text field's controlTextDidEndEditing: method, you could reset the system back to the beginning state, so it would be ready for the next time you click on it.
After Edit: Here is the code I'm using in my overlay class:
#implementation Overlay
static NSComparisonResult rdComparator( NSView *view1, NSView *view2, void *context ) {
if ([view1 isKindOfClass:[NSTextField class]])
return NSOrderedDescending;
else if ([view2 isKindOfClass:[NSTextField class]])
return NSOrderedAscending;
return NSOrderedSame;
}
-(void)mouseDown:(NSEvent *)theEvent {
self.box.fillColor = [NSColor redColor];
NSView *contentView = self.box.subviews.lastObject;
[contentView sortSubviewsUsingFunction:rdComparator context:nil];
}
I've solved it by subclassing NSTextField and decrementing click count of mouse down events programmatically. Using a boolean property of the subclass I am able to turn this special behavior on and off.
- (void)mouseDown:(NSEvent *)theEvent
{
if (self.specialBehavior) {
theEvent = [NSEvent mouseEventWithType:theEvent.type
location:theEvent.locationInWindow
modifierFlags:theEvent.modifierFlags
timestamp:theEvent.timestamp
windowNumber:theEvent.windowNumber
context:theEvent.context
eventNumber:theEvent.eventNumber
clickCount:theEvent.clickCount - 1
pressure:theEvent.pressure];
}
[super mouseDown:theEvent];
}
To simplify this long method call, I wrote a category method for NSEvent which decrements the click count of an event.
I've a vertical NSSplitView, the bottom subview contains a custom view (eg NSView) and a NSTextView.
The NSView contains inside it two NSButtons.
When I resize the splitView, making it smaller, the NSView containing the buttons is resized, too.
I don't want this behavior.
To better explain my problem please view the attached image.
Image 1: the window at application startup, everything is ok
Image 2: I've resized making smaller the split view, only a little part of buttons is visible
Image 3: I've enlarged again the split view but as you can see the NSView remains smaller and buttons are no longer visible (if I resize the splitView to bottom the NSView 'disappears')
This is a vicious problem that's based on the legacy workings of Cocoa views. The best solution I've seen is to constrain the minimum dimension of any portion of the split view. If the subviews never collapse, their metrics don't cross into another dimension and they should re-enlarge just fine.
To do this, set up a delegate for your split view, which will implement - splitView:constrainMaxCoordinate:ofSubviewAt:. The split view will call your delegate method hoping it can leave the max divider position at the height of the split view (passing this in as the second argument), but you can simply subtract some quantity from that value (say, 60) to return it as the minimum height for the bottom view.
- (CGFloat)splitView:(NSSplitView *)aSplitView
constrainMaxCoordinate:(CGFloat)proposedMin
ofSubviewAt:(NSInteger)dividerIndex {
return proposedMin - 60;
}
Of course, you'll probably want to do more checking in this method to make sure you're talking about the right split view, and the right subview, to avoid overreaching effects, but this is the basic idea.
(See also this fabulicious article on the subject.)
Constraining the divider position did not help in my case, as I'm animating the subviews and subviews can be collapsed.
I managed to achieve an acceptable solution by implementing the splitView delegate method -splitviewWillResizeSubviews: (means, you have to connect the delegate property from the split view to your controller in IB or in code) to maintain a minimum width by setting the subview to hidden instead of shrinking it to zero:
- (void)splitViewWillResizeSubviews:(NSNotification *)notification {
NSUInteger divider = [[[notification userInfo] valueForKey:#"NSSplitViewDividerIndex"] intValue];
NSView *subview = nil;
if(divider == SPLITVIEW_DIVIDER_SIDEBAR) {
subview = (NSView*)[self.splitView.subviews objectAtIndex:SPLITVIEW_SIDEBAR_INDEX];
}
if(subview) {
if(subview.frame.size.width < SPLITVIEW_MINIMUM_SIDEBAR_WIDTH) {
CGRect correctedFrame = subview.frame;
correctedFrame.size.width = SPLITVIEW_MINIMUM_SIDEBAR_WIDTH;
subview.frame = correctedFrame;
subview.hidden = YES;
} else {
subview.hidden = NO;
}
}
}
I have a View within an NSPopover, and I am unable to set the tab order correctly. I have set the nextKeyView within my 4 text fields. But it tends to flip from TextField1 to Search1, instead of TextField1 -> TextField2. I have tried inserting [self.view.window makeFirstResponder:textField1] also [self.view.window setInitialFirstResponder:textField1] along with recalculatekeyviewloop but with no luck.
Any help would be much appreciated.
I had a similiar problem when composing the popover-view of certain subviews programatically in awakeFromNIB. I could solve the problem by inserting the subviews after the popover had its private NSPopoverWindow set (i.e. it was shown the first time). It seems like the popover is re-evaluating the view-loop when the popover-view is embedded in the private child-window - ignoring the view-loop given in the view.
You could try the following:
-(void) popoverDidShow:(NSNotification *)notification{ // NSPopoverDelegate-method
if (!popoverDidShowForTheFirstTime){
[self setUpViews];
}...
-(void) setUpViews{
popoverDidShowForTheFirstTime = YES;
// insert views and establish nextKeyViews ...
I'm trying to display an NSPopover with additional information to a selected row of an NSTableView. For that I need to get a reference to the view representation of the selected row so I can "attach" my popover to it:
NSInteger row = [[self membersTableView] selectedRow];
NSTableRowView *aView = [[self membersTableView] rowViewAtRow: row makeIfNecessary: YES];
[self setQuickLookPopoverController: [QuickLookPopoverController showPopoverFor: anObject at: aView]];
In the above, the result of aView is always nil. According to Apple documentation, this is the method to obtain a view object, given a selected row. Especially the last sentence of the discussion is a bit weird:
Discussion This method will first attempt to return a currently
displayed view in the visible area. If there is no visible view, and
makeIfNecessary is YES, a prepared temporary view is returned. If
makeIfNecessary is NO, and the view is not visible, nil will be
returned.
In general, makeIfNecessary should be YES if you require a resulting
view, and NO if you only want to update properties on a view only if
it is available (generally this means it is visible).
An exception will be thrown if row is not within the numberOfRows. The
returned result should generally not be held onto for longer than the
current run loop cycle. It is better to call
rowViewAtRow:makeIfNecessary: whenever a view is required..
Why is this method always returning nil?
Solved it. I used NSTableView's method (NSRect) rectOfRow: (NSInteger) rowIndex which will give the frame of the required row.
Thanks for showing me the right direction, I had the same problem! I ended up doing the following, but note that I disabled selection of empty rows and that the following code is inside an IBAction:
[popOver showRelativeToRect:[sender bounds]
ofView:[sender rowViewAtRow:[sender selectedRow]
makeIfNecessary:YES]
preferredEdge:NSMaxXEdge];