In NSTableView I have NSTableRowView and in this row there is some NSImageView subview.
Question: how to track click event on this image?
You would need to create NSImageView subclass to handle mouse events. But NSTableView does not allow handling -[NSImageView mouseUp:] and other mouse messages. (I think this is related to how a table handles selection).
In this situation I had to use a borderless "Bevel - Switch" button to handle clicks.
I have a NSButton on a view I subclass the NSView and draw something in the drawRect:, and the view is belong to a NSWindow which
Then when I click the button, I find the view become transparent, which I guess is because the button click changes the button's background. So I subclass the NSButton,
- (void)mouseDown:(NSEvent *)theEvent {
[self.window.contentView setNeedsDisplay:YES];
[super mouseDown:theEvent];
[self.window.contentView setNeedsDisplay:YES];
}
Right now when I mouseDown and mouseUp, the view seems right, except there is a flash transparent when I click, even more, when I mouseDown and move out of the button, the background becomes transparent again.
Can anyone tell me what should I do to make the background of a clicked button do not change?or where to put the redraw code.
THANKS!
So I have two scroll views that I want my XIB to show.
My first scroll view is loaded with the XIB and I want the second to be loaded when a button is pressed.
Does any body know how I can do this?
UIScrollView inherits from UIView. All you have to do is set it's hidden property to hidden. It is a simple set method. By default it will display as long as you add the view.
On your click action or method triggered simply set the property for the UIScrollView like:
[myScrollView setHidden:NO];
And if you want it to disappear again, on a different action:
[myScrollView setHidden:YES];
I need fixed-size NSTextViews inside a larger scrolling window. IB requires that the textviews be inside their own NSScrollViews, even though their min/max sizes are fixed so that they won’t actually scroll. When trackpad gestures are made within the textview frames (regardless of whether they have focus), they are captured by the textviews’ scrollviews, so nothing happens.
How do I tell the textviews’ scrollviews to pass scroll events up to the window’s main scrollview? (Or perhaps I should be asking how I tell the window’s main scrollview to handle these events itself and not pass them on to its child scrollviews.)
The IB structure is like this:
window
window’s content view
big scrollview for window (desired target for scroll events)
box
swappable content view in separate xib
scrollview for textview
textview
And, yes, the window does scroll correctly when the textviews do not have focus.
You needn't create a outlet "svActive" to track your super scrollview. Just write this sentence in scrollWheel event:
[[self nextResponder] scrollWheel:event];
this will pass the event to next responder in the responder chain.
IB does not require you have a text view inside a NSScrollView; this is just the default, because most of the time you'll want your view to scroll. Select the NSTextView and choose Layout > Unembed Objects. Note that after this point, you can no longer move or resize your view in IB. This seems to be a bug.
Here's an example of how to put two NSTextViews in a single NSScrollView.
Add two text views next to each other; put some text in them so you can see what's happening.
Select the views; choose Layout > Embed Objects In > Scroll View. This puts them in a generic NSView inside a NSScrollView.
Select the text views; choose Layout > Unembed Objects.
Turn off the springs and struts (autosizing) for each text view, so they don't resize when you shrink the scroll view.
Take note of the height of the document view (here it's 175).
Make the scroll view smaller. This also resizes the document view (NSView).
Restore the document view to its original size (I set the height back to 175).
Done! Scrolling works as you'd expect.
This is really embarrassing. After weeks of putting it off, I made a first attempt to get a subclassed NSScrollView to behave passively — and it turned out to be a no brainer.
Here’s the subclass:
h file:
#import <Cocoa/Cocoa.h>
#interface ScrollViewPassive : NSScrollView {
// This property is assigned a ref to windowController’s main scrollview.
NSScrollView *svActive;
}
#property (nonatomic, retain) NSScrollView *svActive;
#end
m file:
#import "ScrollViewPassive.h"
#implementation ScrollViewPassive
#synthesize svActive;
// Pass any gesture scrolling up to the main, active scrollview.
- (void)scrollWheel:(NSEvent *)event {
[svActive scrollWheel:event];
}
#end
There’s no need to make outlets for these passive scrollviews; I give them their refs to the main scrollview right after their xibs are assigned as content to the NSBox:
[self.boxDisplayingTextViews setContentView:self.subviewCtllr1.view];
// A textview's superview's superview is its scrollview:
((ScrollViewPassive *)[[self.subviewCtllr1.textview1 superview] superview]).svActive = self.scrollviewMain;
That’s it. Works like a charm.
I find that IB3 and Xcode4 both fight you if you try to do this directly, but you can do it indirectly. First, drag the textview out of the scrollview and delete the scrollview. You'll wind up with an orphaned textview. I don't know any way to get IB to allow you to put this into your window, but it'll be in your NIB. Now, attach an IBOutlet to it, and at runtime do a addSubview: and adjust its frame to move it into whatever scrollview you wanted it to be in.
In my experience, NIBs are a good thing, but every complex NIB I've ever worked with needed some final rearranging in code.
Based on #phaibin's answer, here's how you'd do it in Swift 4.2.
First, subclass NSScrollView and override scrollWheel:
class ScrollThingy: NSScrollView{
override func scrollWheel(with event: NSEvent) {
self.nextResponder?.scrollWheel(with: event)
}
}
Then place the ScrollThingy class (or whatever you name it) on the NSScrollView that is wrapped around your NSTextView. The parent NSScrollView will get the scroll event thereafter.
I'm creating a custom subclass of NSPopUpButton and NSPopUpButtonCell to display a lone icon on top of the button instead of the usual text.
To do this I'm overriding
- (void)drawInteriorWithFrame:(NSRect)cellFrame inView:(NSView *)controlView
in my button cell subclass to draw my icon at the appropriate size and location. When the user mouses over the button I then want to change the image. My only problem is I can't figure out how to make the button cell redisplay (by calling drawInterior... again). By default it only seems to redisplay when the button is clicked or when focus is moved to another window. I've tried setNeedsDisplay:YES but that doesn't seem to do it.
The way I found to do this was to insert a call to
[self updateCell:self.cell];
inside my NSPopUpButton subclass immediately after any point I changed the image displayed by the cell.